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[Emacs-diffs] trunk r113126: New version of todo-mode.el.


From: Stephen Berman
Subject: [Emacs-diffs] trunk r113126: New version of todo-mode.el.
Date: Fri, 21 Jun 2013 21:59:04 +0000
User-agent: Bazaar (2.6b2)

------------------------------------------------------------
revno: 113126 [merge]
revision-id: address@hidden
parent: address@hidden
parent: address@hidden
committer: Stephen Berman <address@hidden>
branch nick: trunk
timestamp: Fri 2013-06-21 23:58:09 +0200
message:
  New version of todo-mode.el.
  
  2013-06-21  Stephen Berman  <address@hidden>
  
        * obsolete/otodo-mode.el: Move and rename from calendar/todo-mode.el.
  
        * calendar/diary-lib.el (diary-goto-entry-function): New variable.
        (diary-entry): Use it in the action of this button type instead of
        diary-goto-entry.
  
        * calendar/todo-mode.el: New version.
        (todo-add-category): Append new category to end of file and give
        it the highest number, instead of putting it at the beginning and
        giving it 0.  Incorporate noninteractive functionality.
        (todo-forward-category): Adapt to 1-based category numbering.
        Allow skipping over archived categories.
        (todo-backward-category): Derive from todo-forward-category.
        (todo-backward-item, todo-forward-item): Make noninteractive and
        delegate interactive part to new commands.  Make sensitive to done 
items.
        (todo-categories): Make value an alist of category names and
        vectors of item counts.
        (todo-category-beg): Make a defconst.
        (todo-category-number): Use 1 instead of 0 as initial value.
        (todo-category-select): Make sensitive to overlays, optional item
        highlighting and done items.
        (todo-delete-item): Make sensitive to overlays and marked and done 
items.
        (todo-edit-item): Make sensitive to overlays and editing of
        date/time header optional.  Add format checks.
        (todo-edit-multiline): Rename to todo-edit-multiline-item.  Make a
        no-op if point is not on an item.  Advertise using todo-edit-quit.
        (todo-edit-mode): Make sensitive to new format, font-locking, and
        multiple todo files.
        (todo-insert-item, todo-insert-item-here): Derive from
        todo-basic-insert-item and extend functionality.
        (todo-item-end, todo-item-start): Make sensitive to done items.
        (todo-item-string): Don't return text properties.  Restore point.
        (todo-jump-to-category): Make sensitive to multiple todo files and
        todo archives.  Use extended category completion.
        (todo-lower-item, todo-raise-item): Rename to *-priority and
        derive from todo-set-item-priority.
        (todo-mode): Derive from special-mode.  Make sensitive to new
        format, font-locking and multiple todo files.  Make read-only.
        (todo-mode-map): Don't suppress digit keys, so they can supply
        prefix arguments.  Add many new key bindings.
        (todo-prefix): Insert as an overlay instead of file text.
        Change semantics from diary date expression to purely visual mark.
        (todo-print): Rename to todo-print-buffer.  Make buffer display
        features printable.  Remove option to restrict number of items
        printed.  Add option to print to file.
        (todo-print-function): Rename to todo-print-buffer-function.
        (todo-quit): Extend to handle exiting new todo modes.
        (todo-remove-item): Make sensitive to overlays.
        (todo-save): Extend to buffers of filtered items.
        (todo-show): Make sensitive to done items, multiple todo files and
        new todo modes.  Offer to convert legacy todo file before creating
        first new todo file.
        (todo-show-priorities): Rename to todo-top-priorities.
        Change semantics of value 0.
        (todo-top-priorities): Rename to todo-filter-top-priorities,
        derive from todo-filter-items and extend functionality.
        (todo-save-top-priorities): Rename to todo-save-filtered-items-buffer
        and extend functionality to other types of filtered items.
        (todo-add-item-non-interactively, todo-ask-p, todo-cat-slct)
        (todo-category-end, todo-category-sep, todo-cats, todo-cmd-back)
        (todo-cmd-done, todo-cmd-edit, todo-cmd-forw, todo-cmd-inst)
        (todo-cmd-kill, todo-cmd-lowr, todo-cmd-next, todo-cmd-prev)
        (todo-cmd-rais, todo-cmd-save, todo-completing-read, todo-cp)
        (todo-edit-mode-hook, todo-entry-prefix-function)
        (todo-entry-timestamp-initials, todo-file-do, todo-file-done)
        (todo-file-item, todo-file-top, todo-header, todo-initial-setup)
        (todo-initials, todo-insert-threshold, todo-item-string-start)
        (todo-line-string, todo-menu, todo-mode-hook)
        (todo-more-important-p, todo-previous-answer, todo-previous-line)
        (todo-print-priorities, todo-remove-separator)
        (todo-save-top-priorities-too, todo-string-count-lines)
        (todo-string-multiline-p, todo-time-string-format)
        (todo-tmp-buffer-name): Remove.
        (todo-add-file, todo-archive-done-item, todo-choose-archive)
        (todo-convert-legacy-files, todo-copy-item, todo-delete-category)
        (todo-edit-category-diary-inclusion)
        (todo-edit-category-diary-nonmarking, todo-edit-done-item-comment)
        (todo-edit-file, todo-edit-item-date-day)
        (todo-edit-item-date-day-name, todo-edit-item-date-from-calendar)
        (todo-edit-item-date-month, todo-edit-item-date-to-today)
        (todo-edit-item-date-year, todo-edit-item-diary-inclusion)
        (todo-edit-item-diary-nonmarking, todo-edit-item-header)
        (todo-edit-item-time, todo-edit-quit, todo-filter-diary-items)
        (todo-filter-diary-items-multifile, todo-filter-regexp-items)
        (todo-filter-regexp-items-multifile, todo-filter-top-priorities)
        (todo-filter-top-priorities-multifile, todo-find-archive)
        (todo-find-filtered-items-file, todo-go-to-source-item)
        (todo-insert-item-from-calendar, todo-item-done, todo-item-undone)
        (todo-jump-to-archive-category, todo-lower-category)
        (todo-mark-category, todo-marked-item-p, todo-merge-category)
        (todo-move-category, todo-move-item, todo-next-button)
        (todo-next-item, todo-padded-string, todo-powerset)
        (todo-previous-button, todo-previous-item)
        (todo-print-buffer-to-file, todo-raise-category)
        (todo-rename-category, todo-repair-categories-sexp, todo-search)
        (todo-set-category-number, todo-set-item-priority)
        (todo-set-top-priorities-in-category)
        (todo-set-top-priorities-in-file, todo-show-categories-table)
        (todo-sort-categories-alphabetically-or-numerically)
        (todo-sort-categories-by-archived, todo-sort-categories-by-diary)
        (todo-sort-categories-by-done, todo-sort-categories-by-todo)
        (todo-toggle-item-header, todo-toggle-item-highlighting)
        (todo-toggle-mark-item, todo-toggle-prefix-numbers)
        (todo-toggle-view-done-items, todo-toggle-view-done-only)
        (todo-unarchive-items, todo-unmark-category): New commands.
        (todo-absolute-file-name, todo-add-to-buffer-list)
        (todo-adjusted-category-label-length, todo-basic-edit-item-header)
        (todo-basic-insert-item, todo-category-completions)
        (todo-category-number, todo-category-string-matcher-1)
        (todo-category-string-matcher-2, todo-check-filtered-items-file)
        (todo-check-format, todo-clear-matches)
        (todo-comment-string-matcher, todo-convert-legacy-date-time)
        (todo-current-category, todo-date-string-matcher)
        (todo-define-insertion-command, todo-diary-expired-matcher)
        (todo-diary-goto-entry, todo-diary-item-p)
        (todo-diary-nonmarking-matcher, todo-display-as-todo-file)
        (todo-display-categories, todo-display-sorted, todo-done-item-p)
        (todo-done-item-section-p, todo-done-separator)
        (todo-done-string-matcher, todo-files, todo-filter-items)
        (todo-filter-items-1, todo-filter-items-filename, todo-find-item)
        (todo-gen-arglists, todo-get-count, todo-get-overlay, todo-indent)
        (todo-insert-category-line, todo-insert-item-from-calendar)
        (todo-insert-sort-button, todo-insert-with-overlays)
        (todo-insertion-command-name, todo-insertion-key-bindings)
        (todo-label-to-key, todo-longest-category-name-length)
        (todo-make-categories-list, todo-mode-external-set)
        (todo-mode-line-control, todo-modes-set-1, todo-modes-set-2)
        (todo-modes-set-3, todo-multiple-filter-files)
        (todo-nondiary-marker-matcher, todo-prefix-overlays)
        (todo-read-category, todo-read-date, todo-read-dayname)
        (todo-read-file-name, todo-read-time)
        (todo-reevaluate-category-completions-files-defcustom)
        (todo-reevaluate-default-file-defcustom)
        (todo-reevaluate-filelist-defcustoms)
        (todo-reevaluate-filter-files-defcustom)
        (todo-reset-and-enable-done-separator, todo-reset-comment-string)
        (todo-reset-done-separator, todo-reset-done-separator-string)
        (todo-reset-done-string, todo-reset-global-current-todo-file)
        (todo-reset-highlight-item, todo-reset-nondiary-marker)
        (todo-reset-prefix, todo-set-categories)
        (todo-set-date-from-calendar, todo-set-show-current-file)
        (todo-set-top-priorities, todo-short-file-name)
        (todo-show-current-file, todo-sort, todo-time-string-matcher)
        (todo-total-item-counts, todo-update-buffer-list)
        (todo-update-categories-display, todo-update-categories-sexp)
        (todo-update-count, todo-validate-name, todo-y-or-n-p):
        New functions.
        (todo-archive-mode, todo-categories-mode, todo-filtered-items-mode):
        New major modes.
        (todo-categories, todo-display, todo-edit, todo-faces)
        (todo-filtered): New defgroups.
        (todo-archived-only, todo-button, todo-category-string, todo-date)
        (todo-diary-expired, todo-done, todo-done-sep, todo-comment)
        (todo-mark, todo-nondiary, todo-prefix-string, todo-search)
        (todo-sorted-column, todo-time, todo-top-priority): New deffaces.
        (todo-add-item-if-new-category, todo-always-add-time-string)
        (todo-categories-align, todo-categories-archived-label)
        (todo-categories-category-label, todo-categories-diary-label)
        (todo-categories-done-label, todo-categories-number-separator)
        (todo-categories-todo-label, todo-categories-totals-label)
        (todo-category-completions-files, todo-completion-ignore-case)
        (todo-default-todo-file, todo-diary-nonmarking, todo-directory)
        (todo-done-separator-string, todo-done-string)
        (todo-files-function, todo-filter-done-items, todo-filter-files)
        (todo-highlight-item, todo-include-in-diary, todo-indent-to-here)
        (todo-initial-category, todo-initial-file, todo-item-mark)
        (todo-legacy-date-time-regexp, todo-mode-line-function)
        (todo-nondiary-marker, todo-number-prefix)
        (todo-print-buffer-function, todo-show-current-file)
        (todo-show-done-only, todo-show-first, todo-show-with-done)
        (todo-skip-archived-categories, todo-top-priorities-overrides)
        (todo-undo-item-omit-comment, todo-use-only-highlighted-region)
        (todo-visit-files-commands, todo-wrap-lines, todo-y-with-space):
        New defcustoms.
        (todo-category-done, todo-date-pattern, todo-date-string-start)
        (todo-diary-items-buffer, todo-done-string-start)
        (todo-filtered-items-buffer, todo-item-start)
        (todo-month-abbrev-array, todo-month-name-array)
        (todo-nondiary-end, todo-nondiary-start, todo-regexp-items-buffer)
        (todo-top-priorities-buffer): New defconsts.
        (todo-archive-mode-map, todo-archives, todo-categories-mode-map)
        (todo-categories-with-marks, todo-category-string-face)
        (todo-comment-face, todo-comment-string, todo-current-todo-file)
        (todo-date-face, todo-date-from-calendar, todo-descending-counts)
        (todo-diary-expired-face, todo-done-face, todo-done-sep-face)
        (todo-done-separator, todo-edit-buffer, todo-edit-mode-map)
        (todo-file-buffers, todo-files, todo-filtered-items-mode-map)
        (todo-font-lock-keywords, todo-global-current-todo-file)
        (todo-insertion-commands, todo-insertion-commands-arg-key-list)
        (todo-insertion-commands-args)
        (todo-insertion-commands-args-genlist)
        (todo-insertion-commands-names, todo-insertion-map)
        (todo-key-bindings-t, todo-key-bindings-t+a)
        (todo-key-bindings-t+a+f, todo-key-bindings-t+f, todo-mode-map)
        (todo-multiple-filter-files, todo-multiple-filter-files-widget)
        (todo-nondiary-face, todo-print-buffer, todo-time-face)
        (todo-visited): New variables.
added:
  lisp/calendar/todo-mode.el     todos.el-20120911155047-0ytqo2nidwqquefa-1
renamed:
  lisp/calendar/todo-mode.el => lisp/obsolete/otodo-mode.el 
todomode.el-20091113204419-o5vbwnq5f7feedwu-1238
modified:
  lisp/ChangeLog                 changelog-20091113204419-o5vbwnq5f7feedwu-1432
  lisp/calendar/diary-lib.el     diarylib.el-20091113204419-o5vbwnq5f7feedwu-902
=== modified file 'lisp/ChangeLog'
--- a/lisp/ChangeLog    2013-06-21 16:00:00 +0000
+++ b/lisp/ChangeLog    2013-06-21 21:55:44 +0000
@@ -1,3 +1,203 @@
+2013-06-21  Stephen Berman  <address@hidden>
+
+       * obsolete/otodo-mode.el: Move and rename from calendar/todo-mode.el.
+
+       * calendar/diary-lib.el (diary-goto-entry-function): New variable.
+       (diary-entry): Use it in the action of this button type instead of
+       diary-goto-entry.
+
+       * calendar/todo-mode.el: New version.
+       (todo-add-category): Append new category to end of file and give
+       it the highest number, instead of putting it at the beginning and
+       giving it 0.  Incorporate noninteractive functionality.
+       (todo-forward-category): Adapt to 1-based category numbering.
+       Allow skipping over archived categories.
+       (todo-backward-category): Derive from todo-forward-category.
+       (todo-backward-item, todo-forward-item): Make noninteractive and
+       delegate interactive part to new commands.  Make sensitive to done 
items.
+       (todo-categories): Make value an alist of category names and
+       vectors of item counts.
+       (todo-category-beg): Make a defconst.
+       (todo-category-number): Use 1 instead of 0 as initial value.
+       (todo-category-select): Make sensitive to overlays, optional item
+       highlighting and done items.
+       (todo-delete-item): Make sensitive to overlays and marked and done 
items.
+       (todo-edit-item): Make sensitive to overlays and editing of
+       date/time header optional.  Add format checks.
+       (todo-edit-multiline): Rename to todo-edit-multiline-item.  Make a
+       no-op if point is not on an item.  Advertise using todo-edit-quit.
+       (todo-edit-mode): Make sensitive to new format, font-locking, and
+       multiple todo files.
+       (todo-insert-item, todo-insert-item-here): Derive from
+       todo-basic-insert-item and extend functionality.
+       (todo-item-end, todo-item-start): Make sensitive to done items.
+       (todo-item-string): Don't return text properties.  Restore point.
+       (todo-jump-to-category): Make sensitive to multiple todo files and
+       todo archives.  Use extended category completion.
+       (todo-lower-item, todo-raise-item): Rename to *-priority and
+       derive from todo-set-item-priority.
+       (todo-mode): Derive from special-mode.  Make sensitive to new
+       format, font-locking and multiple todo files.  Make read-only.
+       (todo-mode-map): Don't suppress digit keys, so they can supply
+       prefix arguments.  Add many new key bindings.
+       (todo-prefix): Insert as an overlay instead of file text.
+       Change semantics from diary date expression to purely visual mark.
+       (todo-print): Rename to todo-print-buffer.  Make buffer display
+       features printable.  Remove option to restrict number of items
+       printed.  Add option to print to file.
+       (todo-print-function): Rename to todo-print-buffer-function.
+       (todo-quit): Extend to handle exiting new todo modes.
+       (todo-remove-item): Make sensitive to overlays.
+       (todo-save): Extend to buffers of filtered items.
+       (todo-show): Make sensitive to done items, multiple todo files and
+       new todo modes.  Offer to convert legacy todo file before creating
+       first new todo file.
+       (todo-show-priorities): Rename to todo-top-priorities.
+       Change semantics of value 0.
+       (todo-top-priorities): Rename to todo-filter-top-priorities,
+       derive from todo-filter-items and extend functionality.
+       (todo-save-top-priorities): Rename to todo-save-filtered-items-buffer
+       and extend functionality to other types of filtered items.
+       (todo-add-item-non-interactively, todo-ask-p, todo-cat-slct)
+       (todo-category-end, todo-category-sep, todo-cats, todo-cmd-back)
+       (todo-cmd-done, todo-cmd-edit, todo-cmd-forw, todo-cmd-inst)
+       (todo-cmd-kill, todo-cmd-lowr, todo-cmd-next, todo-cmd-prev)
+       (todo-cmd-rais, todo-cmd-save, todo-completing-read, todo-cp)
+       (todo-edit-mode-hook, todo-entry-prefix-function)
+       (todo-entry-timestamp-initials, todo-file-do, todo-file-done)
+       (todo-file-item, todo-file-top, todo-header, todo-initial-setup)
+       (todo-initials, todo-insert-threshold, todo-item-string-start)
+       (todo-line-string, todo-menu, todo-mode-hook)
+       (todo-more-important-p, todo-previous-answer, todo-previous-line)
+       (todo-print-priorities, todo-remove-separator)
+       (todo-save-top-priorities-too, todo-string-count-lines)
+       (todo-string-multiline-p, todo-time-string-format)
+       (todo-tmp-buffer-name): Remove.
+       (todo-add-file, todo-archive-done-item, todo-choose-archive)
+       (todo-convert-legacy-files, todo-copy-item, todo-delete-category)
+       (todo-edit-category-diary-inclusion)
+       (todo-edit-category-diary-nonmarking, todo-edit-done-item-comment)
+       (todo-edit-file, todo-edit-item-date-day)
+       (todo-edit-item-date-day-name, todo-edit-item-date-from-calendar)
+       (todo-edit-item-date-month, todo-edit-item-date-to-today)
+       (todo-edit-item-date-year, todo-edit-item-diary-inclusion)
+       (todo-edit-item-diary-nonmarking, todo-edit-item-header)
+       (todo-edit-item-time, todo-edit-quit, todo-filter-diary-items)
+       (todo-filter-diary-items-multifile, todo-filter-regexp-items)
+       (todo-filter-regexp-items-multifile, todo-filter-top-priorities)
+       (todo-filter-top-priorities-multifile, todo-find-archive)
+       (todo-find-filtered-items-file, todo-go-to-source-item)
+       (todo-insert-item-from-calendar, todo-item-done, todo-item-undone)
+       (todo-jump-to-archive-category, todo-lower-category)
+       (todo-mark-category, todo-marked-item-p, todo-merge-category)
+       (todo-move-category, todo-move-item, todo-next-button)
+       (todo-next-item, todo-padded-string, todo-powerset)
+       (todo-previous-button, todo-previous-item)
+       (todo-print-buffer-to-file, todo-raise-category)
+       (todo-rename-category, todo-repair-categories-sexp, todo-search)
+       (todo-set-category-number, todo-set-item-priority)
+       (todo-set-top-priorities-in-category)
+       (todo-set-top-priorities-in-file, todo-show-categories-table)
+       (todo-sort-categories-alphabetically-or-numerically)
+       (todo-sort-categories-by-archived, todo-sort-categories-by-diary)
+       (todo-sort-categories-by-done, todo-sort-categories-by-todo)
+       (todo-toggle-item-header, todo-toggle-item-highlighting)
+       (todo-toggle-mark-item, todo-toggle-prefix-numbers)
+       (todo-toggle-view-done-items, todo-toggle-view-done-only)
+       (todo-unarchive-items, todo-unmark-category): New commands.
+       (todo-absolute-file-name, todo-add-to-buffer-list)
+       (todo-adjusted-category-label-length, todo-basic-edit-item-header)
+       (todo-basic-insert-item, todo-category-completions)
+       (todo-category-number, todo-category-string-matcher-1)
+       (todo-category-string-matcher-2, todo-check-filtered-items-file)
+       (todo-check-format, todo-clear-matches)
+       (todo-comment-string-matcher, todo-convert-legacy-date-time)
+       (todo-current-category, todo-date-string-matcher)
+       (todo-define-insertion-command, todo-diary-expired-matcher)
+       (todo-diary-goto-entry, todo-diary-item-p)
+       (todo-diary-nonmarking-matcher, todo-display-as-todo-file)
+       (todo-display-categories, todo-display-sorted, todo-done-item-p)
+       (todo-done-item-section-p, todo-done-separator)
+       (todo-done-string-matcher, todo-files, todo-filter-items)
+       (todo-filter-items-1, todo-filter-items-filename, todo-find-item)
+       (todo-gen-arglists, todo-get-count, todo-get-overlay, todo-indent)
+       (todo-insert-category-line, todo-insert-item-from-calendar)
+       (todo-insert-sort-button, todo-insert-with-overlays)
+       (todo-insertion-command-name, todo-insertion-key-bindings)
+       (todo-label-to-key, todo-longest-category-name-length)
+       (todo-make-categories-list, todo-mode-external-set)
+       (todo-mode-line-control, todo-modes-set-1, todo-modes-set-2)
+       (todo-modes-set-3, todo-multiple-filter-files)
+       (todo-nondiary-marker-matcher, todo-prefix-overlays)
+       (todo-read-category, todo-read-date, todo-read-dayname)
+       (todo-read-file-name, todo-read-time)
+       (todo-reevaluate-category-completions-files-defcustom)
+       (todo-reevaluate-default-file-defcustom)
+       (todo-reevaluate-filelist-defcustoms)
+       (todo-reevaluate-filter-files-defcustom)
+       (todo-reset-and-enable-done-separator, todo-reset-comment-string)
+       (todo-reset-done-separator, todo-reset-done-separator-string)
+       (todo-reset-done-string, todo-reset-global-current-todo-file)
+       (todo-reset-highlight-item, todo-reset-nondiary-marker)
+       (todo-reset-prefix, todo-set-categories)
+       (todo-set-date-from-calendar, todo-set-show-current-file)
+       (todo-set-top-priorities, todo-short-file-name)
+       (todo-show-current-file, todo-sort, todo-time-string-matcher)
+       (todo-total-item-counts, todo-update-buffer-list)
+       (todo-update-categories-display, todo-update-categories-sexp)
+       (todo-update-count, todo-validate-name, todo-y-or-n-p):
+       New functions.
+       (todo-archive-mode, todo-categories-mode, todo-filtered-items-mode):
+       New major modes.
+       (todo-categories, todo-display, todo-edit, todo-faces)
+       (todo-filtered): New defgroups.
+       (todo-archived-only, todo-button, todo-category-string, todo-date)
+       (todo-diary-expired, todo-done, todo-done-sep, todo-comment)
+       (todo-mark, todo-nondiary, todo-prefix-string, todo-search)
+       (todo-sorted-column, todo-time, todo-top-priority): New deffaces.
+       (todo-add-item-if-new-category, todo-always-add-time-string)
+       (todo-categories-align, todo-categories-archived-label)
+       (todo-categories-category-label, todo-categories-diary-label)
+       (todo-categories-done-label, todo-categories-number-separator)
+       (todo-categories-todo-label, todo-categories-totals-label)
+       (todo-category-completions-files, todo-completion-ignore-case)
+       (todo-default-todo-file, todo-diary-nonmarking, todo-directory)
+       (todo-done-separator-string, todo-done-string)
+       (todo-files-function, todo-filter-done-items, todo-filter-files)
+       (todo-highlight-item, todo-include-in-diary, todo-indent-to-here)
+       (todo-initial-category, todo-initial-file, todo-item-mark)
+       (todo-legacy-date-time-regexp, todo-mode-line-function)
+       (todo-nondiary-marker, todo-number-prefix)
+       (todo-print-buffer-function, todo-show-current-file)
+       (todo-show-done-only, todo-show-first, todo-show-with-done)
+       (todo-skip-archived-categories, todo-top-priorities-overrides)
+       (todo-undo-item-omit-comment, todo-use-only-highlighted-region)
+       (todo-visit-files-commands, todo-wrap-lines, todo-y-with-space):
+       New defcustoms.
+       (todo-category-done, todo-date-pattern, todo-date-string-start)
+       (todo-diary-items-buffer, todo-done-string-start)
+       (todo-filtered-items-buffer, todo-item-start)
+       (todo-month-abbrev-array, todo-month-name-array)
+       (todo-nondiary-end, todo-nondiary-start, todo-regexp-items-buffer)
+       (todo-top-priorities-buffer): New defconsts.
+       (todo-archive-mode-map, todo-archives, todo-categories-mode-map)
+       (todo-categories-with-marks, todo-category-string-face)
+       (todo-comment-face, todo-comment-string, todo-current-todo-file)
+       (todo-date-face, todo-date-from-calendar, todo-descending-counts)
+       (todo-diary-expired-face, todo-done-face, todo-done-sep-face)
+       (todo-done-separator, todo-edit-buffer, todo-edit-mode-map)
+       (todo-file-buffers, todo-files, todo-filtered-items-mode-map)
+       (todo-font-lock-keywords, todo-global-current-todo-file)
+       (todo-insertion-commands, todo-insertion-commands-arg-key-list)
+       (todo-insertion-commands-args)
+       (todo-insertion-commands-args-genlist)
+       (todo-insertion-commands-names, todo-insertion-map)
+       (todo-key-bindings-t, todo-key-bindings-t+a)
+       (todo-key-bindings-t+a+f, todo-key-bindings-t+f, todo-mode-map)
+       (todo-multiple-filter-files, todo-multiple-filter-files-widget)
+       (todo-nondiary-face, todo-print-buffer, todo-time-face)
+       (todo-visited): New variables.
+
 2013-06-21  Glenn Morris  <address@hidden>
 
        * play/cookie1.el (cookie-apropos): Add optional display argument.

=== modified file 'lisp/calendar/diary-lib.el'
--- a/lisp/calendar/diary-lib.el        2013-05-12 01:34:30 +0000
+++ b/lisp/calendar/diary-lib.el        2013-06-18 16:05:01 +0000
@@ -1032,7 +1032,14 @@
 (define-obsolete-function-alias 'simple-diary-display
   'diary-simple-display "23.1")
 
-(define-button-type 'diary-entry 'action #'diary-goto-entry
+(defvar diary-goto-entry-function 'diary-goto-entry
+  "Function called to jump to a diary entry.
+Modes that require special handling of the included file
+containing the diary entry can assign a suitable function to this
+variable.")
+
+(define-button-type 'diary-entry
+  'action (lambda (button) (funcall diary-goto-entry-function button))
   'face 'diary-button 'help-echo "Find this diary entry"
   'follow-link t)
 

=== added file 'lisp/calendar/todo-mode.el'
--- a/lisp/calendar/todo-mode.el        1970-01-01 00:00:00 +0000
+++ b/lisp/calendar/todo-mode.el        2013-06-21 14:07:46 +0000
@@ -0,0 +1,6390 @@
+;;; todo-mode.el --- facilities for making and maintaining todo lists
+
+;; Copyright (C) 1997, 1999, 2001-2013  Free Software Foundation, Inc.
+
+;; Author: Oliver Seidel <address@hidden>
+;;     Stephen Berman <address@hidden>
+;; Maintainer: Stephen Berman <address@hidden>
+;; Keywords: calendar, todo
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This package provides facilities for making, displaying, navigating
+;; and editing todo lists, which are prioritized lists of todo items.
+;; Todo lists are identified with named categories, so you can group
+;; together and separately prioritize thematically related todo items.
+;; Each category is stored in a file, which thus provides a further
+;; level of organization.  You can create as many todo files, and in
+;; each as many categories, as you want.
+
+;; With Todo mode you can navigate among the items of a category, and
+;; between categories in the same and in different todo files.  You
+;; can edit todo items, reprioritize them within their category, move
+;; them to another category, delete them, or mark items as done and
+;; store them separately from the not yet done items in a category.
+;; You can add new todo files and categories, rename categories, move
+;; them to another file or delete them.  You can also display summary
+;; tables of the categories in a file and the types of items they
+;; contain.  And you can build cross-categorial lists of items that
+;; satisfy various criteria.
+
+;; To get started, load this package and type `M-x todo-show'.  This
+;; will prompt you for the name of the first todo file, its first
+;; category and the category's first item, create these and display
+;; them in Todo mode.  Now you can insert further items into the list
+;; (i.e., the category) and assign them priorities by typing `i i'.
+
+;; You will probably find it convenient to give `todo-show' a global
+;; key binding in your init file, since it is one of the entry points
+;; to Todo mode; a good choice is `C-c t', since `todo-show' is
+;; bound to `t' in Todo mode.
+
+;; To see a list of all Todo mode commands and their key bindings,
+;; including other entry points, type `C-h m' in Todo mode.  Consult
+;; the documentation strings of the commands for details of their use.
+;; The `todo' customization group and its subgroups list the options
+;; you can set to alter the behavior of many commands and various
+;; aspects of the display.
+
+;; This package is a new version of Oliver Seidel's todo-mode.el.
+;; While it retains the same basic organization and handling of todo
+;; lists and the basic UI, it significantly extends these and adds
+;; many features.  This required also making changes to the internals,
+;; including the file format.  If you have a todo file in old format,
+;; then the first time you invoke `todo-show' (i.e., before you have
+;; created any todo file in the current format), it will ask you
+;; whether to convert that file and show it.  If you choose not to
+;; convert the old-style file at this time, you can do so later by
+;; calling the command `todo-convert-legacy-files'.
+
+;;; Code:
+
+(require 'diary-lib)
+;; For cl-remove-duplicates (in todo-insertion-commands-args) and
+;; cl-oddp.
+(require 'cl-lib)
+
+;; 
-----------------------------------------------------------------------------
+;;; Setting up todo files, categories, and items
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-directory (locate-user-emacs-file "todo/")
+  "Directory where user's todo files are saved."
+  :type 'directory
+  :group 'todo)
+
+(defun todo-files (&optional archives)
+  "Default value of `todo-files-function'.
+This returns the case-insensitive alphabetically sorted list of
+file truenames in `todo-directory' with the extension
+\".todo\".  With non-nil ARCHIVES return the list of archive file
+truenames (those with the extension \".toda\")."
+  (let ((files (if (file-exists-p todo-directory)
+                  (mapcar 'file-truename
+                   (directory-files todo-directory t
+                                    (if archives "\.toda$" "\.todo$") t)))))
+    (sort files (lambda (s1 s2) (let ((cis1 (upcase s1))
+                                     (cis2 (upcase s2)))
+                                 (string< cis1 cis2))))))
+
+(defcustom todo-files-function 'todo-files
+  "Function returning the value of the variable `todo-files'.
+This function should take an optional argument that, if non-nil,
+makes it return the value of the variable `todo-archives'."
+  :type 'function
+  :group 'todo)
+
+(defvar todo-files (funcall todo-files-function)
+  "List of truenames of user's todo files.")
+
+(defvar todo-archives (funcall todo-files-function t)
+  "List of truenames of user's todo archives.")
+
+(defvar todo-visited nil
+  "List of todo files visited in this session by `todo-show'.
+Used to determine initial display according to the value of
+`todo-show-first'.")
+
+(defvar todo-file-buffers nil
+  "List of file names of live Todo mode buffers.")
+
+(defvar todo-global-current-todo-file nil
+  "Variable holding name of current todo file.
+Used by functions called from outside of Todo mode to visit the
+current todo file rather than the default todo file (i.e. when
+users option `todo-show-current-file' is non-nil).")
+
+(defvar todo-current-todo-file nil
+  "Variable holding the name of the currently active todo file.")
+
+(defvar todo-categories nil
+  "Alist of categories in the current todo file.
+The elements are cons cells whose car is a category name and
+whose cdr is a vector of the category's item counts.  These are,
+in order, the numbers of todo items, of todo items included in
+the Diary, of done items and of archived items.")
+
+(defvar todo-category-number 1
+  "Variable holding the number of the current todo category.
+Todo categories are numbered starting from 1.")
+
+(defvar todo-categories-with-marks nil
+  "Alist of categories and number of marked items they contain.")
+
+(defconst todo-category-beg "--==-- "
+  "String marking beginning of category (inserted with its name).")
+
+(defconst todo-category-done "==--== DONE "
+  "String marking beginning of category's done items.")
+
+(defcustom todo-done-separator-string "="
+  "String determining the value of variable `todo-done-separator'.
+If the string consists of a single character,
+`todo-done-separator' will be the string made by repeating this
+character for the width of the window, and the length is
+automatically recalculated when the window width changes.  If the
+string consists of more (or less) than one character, it will be
+the value of `todo-done-separator'."
+  :type 'string
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-done-separator-string
+  :group 'todo-display)
+
+(defun todo-done-separator ()
+  "Return string used as value of variable `todo-done-separator'."
+  (let ((sep todo-done-separator-string))
+    (propertize (if (= 1 (length sep))
+                   ;; Until bug#2749 is fixed, if separator's length
+                   ;; is window-width and todo-wrap-lines is
+                   ;; non-nil, an indented empty line appears between
+                   ;; the separator and the first done item.
+                   ;; (make-string (window-width) (string-to-char sep))
+                   (make-string (1- (window-width)) (string-to-char sep))
+                 todo-done-separator-string)
+               'face 'todo-done-sep)))
+
+(defvar todo-done-separator (todo-done-separator)
+  "String used to visually separate done from not done items.
+Displayed as an overlay instead of `todo-category-done' when
+done items are shown.  Its value is determined by user option
+`todo-done-separator-string'.")
+
+(defvar todo-show-done-only nil
+  "If non-nil display only done items in current category.
+Set by the command `todo-toggle-view-done-only' and used by
+`todo-category-select'.")
+
+(defcustom todo-nondiary-marker '("[" "]")
+  "List of strings surrounding item date to block diary inclusion.
+The first string is inserted before the item date and must be a
+non-empty string that does not match a diary date in order to
+have its intended effect.  The second string is inserted after
+the diary date."
+  :type '(list string string)
+  :group 'todo-edit
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-nondiary-marker)
+
+(defconst todo-nondiary-start (nth 0 todo-nondiary-marker)
+  "String inserted before item date to block diary inclusion.")
+
+(defconst todo-nondiary-end (nth 1 todo-nondiary-marker)
+  "String inserted after item date matching `todo-nondiary-start'.")
+
+(defconst todo-month-name-array
+  (vconcat calendar-month-name-array (vector "*"))
+  "Array of month names, in order.
+The final element is \"*\", indicating an unspecified month.")
+
+(defconst todo-month-abbrev-array
+  (vconcat calendar-month-abbrev-array (vector "*"))
+  "Array of abbreviated month names, in order.
+The final element is \"*\", indicating an unspecified month.")
+
+(defconst todo-date-pattern
+  (let ((dayname (diary-name-pattern calendar-day-name-array nil t)))
+    (concat "\\(?4:\\(?5:" dayname "\\)\\|"
+           (let ((dayname)
+                 (monthname (format "\\(?6:%s\\)" (diary-name-pattern
+                                                   todo-month-name-array
+                                                   todo-month-abbrev-array)))
+                 (month "\\(?7:[0-9]+\\|\\*\\)")
+                 (day "\\(?8:[0-9]+\\|\\*\\)")
+                 (year "-?\\(?9:[0-9]+\\|\\*\\)"))
+             (mapconcat 'eval calendar-date-display-form ""))
+           "\\)"))
+  "Regular expression matching a todo item date header.")
+
+;; By itself this matches anything, because of the `?'; however, it's only
+;; used in the context of `todo-date-pattern' (but Emacs Lisp lacks
+;; lookahead).
+(defconst todo-date-string-start
+  (concat "^\\(" (regexp-quote todo-nondiary-start) "\\|"
+         (regexp-quote diary-nonmarking-symbol) "\\)?")
+  "Regular expression matching part of item header before the date.")
+
+(defcustom todo-done-string "DONE "
+  "Identifying string appended to the front of done todo items."
+  :type 'string
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-done-string
+  :group 'todo-edit)
+
+(defconst todo-done-string-start
+  (concat "^\\[" (regexp-quote todo-done-string))
+  "Regular expression matching start of done item.")
+
+(defconst todo-item-start (concat "\\(" todo-date-string-start "\\|"
+                                todo-done-string-start "\\)"
+                                todo-date-pattern)
+  "String identifying start of a todo item.")
+
+;; 
-----------------------------------------------------------------------------
+;;; Todo mode display options
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-prefix ""
+  "String prefixed to todo items for visual distinction."
+  :type '(string :validate
+                (lambda (widget)
+                  (when (string= (widget-value widget) todo-item-mark)
+                    (widget-put
+                     widget :error
+                     "Invalid value: must be distinct from `todo-item-mark'")
+                    widget)))
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-prefix
+  :group 'todo-display)
+
+(defcustom todo-number-prefix t
+  "Non-nil to prefix items with consecutively increasing integers.
+These reflect the priorities of the items in each category."
+  :type 'boolean
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-prefix
+  :group 'todo-display)
+
+(defun todo-mode-line-control (cat)
+  "Return a mode line control for todo or archive file buffers.
+Argument CAT is the name of the current todo category.
+This function is the value of the user variable
+`todo-mode-line-function'."
+  (let ((file (todo-short-file-name todo-current-todo-file)))
+    (format "%s category %d: %s" file todo-category-number cat)))
+
+(defcustom todo-mode-line-function 'todo-mode-line-control
+  "Function that returns a mode line control for Todo mode buffers.
+The function expects one argument holding the name of the current
+todo category.  The resulting control becomes the local value of
+`mode-line-buffer-identification' in each Todo mode buffer."
+  :type 'function
+  :group 'todo-display)
+
+(defcustom todo-highlight-item nil
+  "Non-nil means highlight items at point."
+  :type 'boolean
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-highlight-item
+  :group 'todo-display)
+
+(defcustom todo-wrap-lines t
+  "Non-nil to activate Visual Line mode and use wrap prefix."
+  :type 'boolean
+  :group 'todo-display)
+
+(defcustom todo-indent-to-here 3
+  "Number of spaces to indent continuation lines of items.
+This must be a positive number to ensure such items are fully
+shown in the Fancy Diary display."
+  :type '(integer :validate
+                 (lambda (widget)
+                   (unless (> (widget-value widget) 0)
+                     (widget-put widget :error
+                                 "Invalid value: must be a positive integer")
+                     widget)))
+  :group 'todo-display)
+
+(defun todo-indent ()
+  "Indent from point to `todo-indent-to-here'."
+  (indent-to todo-indent-to-here todo-indent-to-here))
+
+(defcustom todo-show-with-done nil
+  "Non-nil to display done items in all categories."
+  :type 'boolean
+  :group 'todo-display)
+
+;; 
-----------------------------------------------------------------------------
+;;; Faces
+;; 
-----------------------------------------------------------------------------
+
+(defface todo-mark
+  ;; '((t :inherit font-lock-warning-face))
+  '((((class color)
+      (min-colors 88)
+      (background light))
+     (:weight bold :foreground "Red1"))
+    (((class color)
+      (min-colors 88)
+      (background dark))
+     (:weight bold :foreground "Pink"))
+    (((class color)
+      (min-colors 16)
+      (background light))
+     (:weight bold :foreground "Red1"))
+    (((class color)
+      (min-colors 16)
+      (background dark))
+     (:weight bold :foreground "Pink"))
+    (((class color)
+      (min-colors 8))
+     (:foreground "red"))
+    (t
+     (:weight bold :inverse-video t)))
+  "Face for marks on marked items."
+  :group 'todo-faces)
+
+(defface todo-prefix-string
+  ;; '((t :inherit font-lock-constant-face))
+  '((((class grayscale) (background light))
+     (:foreground "LightGray" :weight bold :underline t))
+    (((class grayscale) (background dark))
+     (:foreground "Gray50" :weight bold :underline t))
+    (((class color) (min-colors 88) (background light)) (:foreground "dark 
cyan"))
+    (((class color) (min-colors 88) (background dark)) (:foreground 
"Aquamarine"))
+    (((class color) (min-colors 16) (background light)) (:foreground 
"CadetBlue"))
+    (((class color) (min-colors 16) (background dark)) (:foreground 
"Aquamarine"))
+    (((class color) (min-colors 8)) (:foreground "magenta"))
+    (t (:weight bold :underline t)))
+  "Face for todo item prefix or numerical priority string."
+  :group 'todo-faces)
+
+(defface todo-top-priority
+  ;; bold font-lock-comment-face
+  '((default :weight bold)
+    (((class grayscale) (background light)) :foreground "DimGray" :slant 
italic)
+    (((class grayscale) (background dark)) :foreground "LightGray" :slant 
italic)
+    (((class color) (min-colors 88) (background light)) :foreground 
"Firebrick")
+    (((class color) (min-colors 88) (background dark)) :foreground 
"chocolate1")
+    (((class color) (min-colors 16) (background light)) :foreground "red")
+    (((class color) (min-colors 16) (background dark)) :foreground "red1")
+    (((class color) (min-colors 8) (background light)) :foreground "red")
+    (((class color) (min-colors 8) (background dark)) :foreground "yellow")
+    (t :slant italic))
+  "Face for top priority todo item numerical priority string.
+The item's priority number string has this face if the number is
+less than or equal the category's top priority setting."
+  :group 'todo-faces)
+
+(defface todo-nondiary
+  ;; '((t :inherit font-lock-type-face))
+  '((((class grayscale) (background light)) :foreground "Gray90" :weight bold)
+    (((class grayscale) (background dark))  :foreground "DimGray" :weight bold)
+    (((class color) (min-colors 88) (background light)) :foreground 
"ForestGreen")
+    (((class color) (min-colors 88) (background dark))  :foreground 
"PaleGreen")
+    (((class color) (min-colors 16) (background light)) :foreground 
"ForestGreen")
+    (((class color) (min-colors 16) (background dark))  :foreground 
"PaleGreen")
+    (((class color) (min-colors 8)) :foreground "green")
+    (t :weight bold :underline t))
+  "Face for non-diary markers around todo item date/time header."
+  :group 'todo-faces)
+
+(defface todo-date
+  '((t :inherit diary))
+  "Face for the date string of a todo item."
+  :group 'todo-faces)
+
+(defface todo-time
+  '((t :inherit diary-time))
+  "Face for the time string of a todo item."
+  :group 'todo-faces)
+
+(defface todo-diary-expired
+  ;; Doesn't contrast enough with todo-date (= diary) face.
+  ;; ;; '((t :inherit warning))
+  ;; '((default :weight bold)
+  ;;   (((class color) (min-colors 16)) :foreground "DarkOrange")
+  ;;   (((class color)) :foreground "yellow"))
+  ;; bold font-lock-function-name-face
+  '((default :weight bold)
+    (((class color) (min-colors 88) (background light)) :foreground "Blue1")
+    (((class color) (min-colors 88) (background dark))  :foreground 
"LightSkyBlue")
+    (((class color) (min-colors 16) (background light)) :foreground "Blue")
+    (((class color) (min-colors 16) (background dark))  :foreground 
"LightSkyBlue")
+    (((class color) (min-colors 8)) :foreground "blue")
+    (t :inverse-video t))
+  "Face for expired dates of diary items."
+  :group 'todo-faces)
+
+(defface todo-done-sep
+  ;; '((t :inherit font-lock-builtin-face))
+  '((((class grayscale) (background light)) :foreground "LightGray" :weight 
bold)
+    (((class grayscale) (background dark))  :foreground "DimGray" :weight bold)
+    (((class color) (min-colors 88) (background light)) :foreground "dark 
slate blue")
+    (((class color) (min-colors 88) (background dark))  :foreground 
"LightSteelBlue")
+    (((class color) (min-colors 16) (background light)) :foreground "Orchid")
+    (((class color) (min-colors 16) (background dark)) :foreground 
"LightSteelBlue")
+    (((class color) (min-colors 8)) :foreground "blue" :weight bold)
+    (t :weight bold))
+  "Face for separator string bewteen done and not done todo items."
+  :group 'todo-faces)
+
+(defface todo-done
+  ;; '((t :inherit font-lock-keyword-face))
+  '((((class grayscale) (background light)) :foreground "LightGray" :weight 
bold)
+    (((class grayscale) (background dark))  :foreground "DimGray" :weight bold)
+    (((class color) (min-colors 88) (background light)) :foreground "Purple")
+    (((class color) (min-colors 88) (background dark))  :foreground "Cyan1")
+    (((class color) (min-colors 16) (background light)) :foreground "Purple")
+    (((class color) (min-colors 16) (background dark))  :foreground "Cyan")
+    (((class color) (min-colors 8)) :foreground "cyan" :weight bold)
+    (t :weight bold))
+  "Face for done todo item header string."
+  :group 'todo-faces)
+
+(defface todo-comment
+  ;; '((t :inherit font-lock-comment-face))
+  '((((class grayscale) (background light))
+     :foreground "DimGray" :weight bold :slant italic)
+    (((class grayscale) (background dark))
+     :foreground "LightGray" :weight bold :slant italic)
+    (((class color) (min-colors 88) (background light))
+     :foreground "Firebrick")
+    (((class color) (min-colors 88) (background dark))
+     :foreground "chocolate1")
+    (((class color) (min-colors 16) (background light))
+     :foreground "red")
+    (((class color) (min-colors 16) (background dark))
+     :foreground "red1")
+    (((class color) (min-colors 8) (background light))
+     :foreground "red")
+    (((class color) (min-colors 8) (background dark))
+     :foreground "yellow")
+    (t :weight bold :slant italic))
+  "Face for comments appended to done todo items."
+  :group 'todo-faces)
+
+(defface todo-search
+  ;; '((t :inherit match))
+  '((((class color)
+      (min-colors 88)
+      (background light))
+     (:background "yellow1"))
+    (((class color)
+      (min-colors 88)
+      (background dark))
+     (:background "RoyalBlue3"))
+    (((class color)
+      (min-colors 8)
+      (background light))
+     (:foreground "black" :background "yellow"))
+    (((class color)
+      (min-colors 8)
+      (background dark))
+     (:foreground "white" :background "blue"))
+    (((type tty)
+      (class mono))
+     (:inverse-video t))
+    (t
+     (:background "gray")))
+  "Face for matches found by `todo-search'."
+  :group 'todo-faces)
+
+(defface todo-button
+  ;; '((t :inherit widget-field))
+  '((((type tty))
+     (:foreground "black" :background "yellow3"))
+    (((class grayscale color)
+      (background light))
+     (:background "gray85"))
+    (((class grayscale color)
+      (background dark))
+     (:background "dim gray"))
+    (t
+     (:slant italic)))
+  "Face for buttons in table of categories."
+  :group 'todo-faces)
+
+(defface todo-sorted-column
+  '((((type tty))
+     (:inverse-video t))
+    (((class color)
+      (background light))
+     (:background "grey85"))
+    (((class color)
+      (background dark))
+      (:background "grey85" :foreground "grey10"))
+    (t
+     (:background "gray")))
+  "Face for sorted column in table of categories."
+  :group 'todo-faces)
+
+(defface todo-archived-only
+  ;; '((t (:inherit (shadow))))
+  '((((class color)
+      (background light))
+     (:foreground "grey50"))
+    (((class color)
+      (background dark))
+     (:foreground "grey70"))
+    (t
+     (:foreground "gray")))
+  "Face for archived-only category names in table of categories."
+  :group 'todo-faces)
+
+(defface todo-category-string
+    ;; '((t :inherit font-lock-type-face))
+  '((((class grayscale) (background light)) :foreground "Gray90" :weight bold)
+    (((class grayscale) (background dark))  :foreground "DimGray" :weight bold)
+    (((class color) (min-colors 88) (background light)) :foreground 
"ForestGreen")
+    (((class color) (min-colors 88) (background dark))  :foreground 
"PaleGreen")
+    (((class color) (min-colors 16) (background light)) :foreground 
"ForestGreen")
+    (((class color) (min-colors 16) (background dark))  :foreground 
"PaleGreen")
+    (((class color) (min-colors 8)) :foreground "green")
+    (t :weight bold :underline t))
+  "Face for category-file header in Todo Filtered Items mode."
+  :group 'todo-faces)
+
+;; 
-----------------------------------------------------------------------------
+;;; Entering and exiting
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-visit-files-commands (list 'find-file 'dired-find-file)
+  "List of file finding commands for `todo-display-as-todo-file'.
+Invoking these commands to visit a todo file or todo archive file
+calls `todo-show' or `todo-find-archive', so that the file is
+displayed correctly."
+  :type '(repeat function)
+  :group 'todo)
+
+(defun todo-short-file-name (file)
+  "Return the short form of todo file FILE's name.
+This lacks the extension and directory components."
+  (when (stringp file)
+    (file-name-sans-extension (file-name-nondirectory file))))
+
+(defcustom todo-default-todo-file (todo-short-file-name
+                                    (car (funcall todo-files-function)))
+  "Todo file visited by first session invocation of `todo-show'."
+  :type `(radio ,@(mapcar (lambda (f) (list 'const f))
+                         (mapcar 'todo-short-file-name
+                                 (funcall todo-files-function))))
+  :group 'todo)
+
+(defcustom todo-show-current-file t
+  "Non-nil to make `todo-show' visit the current todo file.
+Otherwise, `todo-show' always visits `todo-default-todo-file'."
+  :type 'boolean
+  :initialize 'custom-initialize-default
+  :set 'todo-set-show-current-file
+  :group 'todo)
+
+(defcustom todo-show-first 'first
+  "What action to take on first use of `todo-show' on a file."
+  :type '(choice (const :tag "Show first category" first)
+                (const :tag "Show table of categories" table)
+                (const :tag "Show top priorities" top)
+                (const :tag "Show diary items" diary)
+                (const :tag "Show regexp items" regexp))
+  :group 'todo)
+
+(defcustom todo-add-item-if-new-category t
+  "Non-nil to prompt for an item after adding a new category."
+  :type 'boolean
+  :group 'todo-edit)
+
+(defcustom todo-initial-file "Todo"
+  "Default file name offered on adding first todo file."
+  :type 'string
+  :group 'todo)
+
+(defcustom todo-initial-category "Todo"
+  "Default category name offered on initializing a new todo file."
+  :type 'string
+  :group 'todo)
+
+(defcustom todo-category-completions-files nil
+  "List of files for building `todo-read-category' completions."
+  :type `(set ,@(mapcar (lambda (f) (list 'const f))
+                       (mapcar 'todo-short-file-name
+                               (funcall todo-files-function))))
+  :group 'todo)
+
+(defcustom todo-completion-ignore-case nil
+  "Non-nil means case is ignored by `todo-read-*' functions."
+  :type 'boolean
+  :group 'todo)
+
+;;;###autoload
+(defun todo-show (&optional solicit-file)
+  "Visit a todo file and display one of its categories.
+
+When invoked in Todo mode, prompt for which todo file to visit.
+When invoked outside of Todo mode with non-nil prefix argument
+SOLICIT-FILE prompt for which todo file to visit; otherwise visit
+`todo-default-todo-file'.  Subsequent invocations from outside
+of Todo mode revisit this file or, with option
+`todo-show-current-file' non-nil (the default), whichever todo
+file was last visited.
+
+If you call this command before you have created any todo file in
+the current format, and you have an todo file in old format, it
+will ask you whether to convert that file and show it.
+Otherwise, calling this command before any todo file exists
+prompts for a file name and an initial category (defaulting to
+`todo-initial-file' and `todo-initial-category'), creates both of
+these, visits the file and displays the category, and if option
+`todo-add-item-if-new-category' is non-nil (the default), prompts
+for the first item.
+
+The first invocation of this command on an existing todo file
+interacts with the option `todo-show-first': if its value is
+`first' (the default), show the first category in the file; if
+its value is `table', show the table of categories in the file;
+if its value is one of `top', `diary' or `regexp', show the
+corresponding saved top priorities, diary items, or regexp items
+file, if any.  Subsequent invocations always show the file's
+current (i.e., last displayed) category.
+
+In Todo mode just the category's unfinished todo items are shown
+by default.  The done items are hidden, but typing
+`\\[todo-toggle-view-done-items]' displays them below the todo
+items.  With non-nil user option `todo-show-with-done' both todo
+and done items are always shown on visiting a category.
+
+Invoking this command in Todo Archive mode visits the
+corresponding todo file, displaying the corresponding category."
+  (interactive "P")
+  (catch 'shown
+    ;; If there is a legacy todo file but no todo file in the current
+    ;; format, offer to convert the legacy file and show it.
+    (unless todo-default-todo-file
+      (let ((legacy-todo-file (if (boundp 'todo-file-do)
+                                 todo-file-do
+                               (locate-user-emacs-file "todo-do" ".todo-do"))))
+       (when (and (file-exists-p legacy-todo-file)
+                  (y-or-n-p (concat "Do you want to convert a copy of your "
+                                    "old todo file to the new format? ")))
+         (when (todo-convert-legacy-files)
+           (throw 'shown nil)))))
+    (let* ((cat)
+          (show-first todo-show-first)
+          (file (cond ((or solicit-file
+                           (and (called-interactively-p 'any)
+                                (memq major-mode '(todo-mode
+                                                   todo-archive-mode
+                                                   todo-filtered-items-mode))))
+                       (if (funcall todo-files-function)
+                           (todo-read-file-name "Choose a todo file to visit: "
+                                                 nil t)
+                         (user-error "There are no todo files")))
+                      ((and (eq major-mode 'todo-archive-mode)
+                            ;; Called noninteractively via todo-quit
+                            ;; to jump to corresponding category in
+                            ;; todo file.
+                            (not (called-interactively-p 'any)))
+                       (setq cat (todo-current-category))
+                       (concat (file-name-sans-extension
+                                todo-current-todo-file) ".todo"))
+                      (t
+                       (or todo-current-todo-file
+                           (and todo-show-current-file
+                                todo-global-current-todo-file)
+                           (todo-absolute-file-name todo-default-todo-file)
+                           (todo-add-file)))))
+          add-item first-file)
+      (unless todo-default-todo-file
+       ;; We just initialized the first todo file, so make it the default.
+       (setq todo-default-todo-file (todo-short-file-name file)
+             first-file t)
+       (todo-reevaluate-default-file-defcustom))
+      (unless (member file todo-visited)
+       ;; Can't setq t-c-t-f here, otherwise wrong file shown when
+       ;; todo-show is called from todo-show-categories-table.
+       (let ((todo-current-todo-file file))
+         (cond ((eq todo-show-first 'table)
+                (todo-show-categories-table))
+               ((memq todo-show-first '(top diary regexp))
+                (let* ((shortf (todo-short-file-name file))
+                       (fi-file (todo-absolute-file-name
+                                 shortf todo-show-first)))
+                  (when (eq todo-show-first 'regexp)
+                    (let ((rxfiles (directory-files todo-directory t
+                                                    ".*\\.todr$" t)))
+                      (when (and rxfiles (> (length rxfiles) 1))
+                        (let ((rxf (mapcar 'todo-short-file-name rxfiles)))
+                          (setq fi-file (todo-absolute-file-name
+                                         (completing-read
+                                          "Choose a regexp items file: "
+                                          rxf) 'regexp))))))
+                  (if (file-exists-p fi-file)
+                      (set-window-buffer
+                       (selected-window)
+                       (set-buffer (find-file-noselect fi-file 'nowarn)))
+                    (message "There is no %s file for %s"
+                             (cond ((eq todo-show-first 'top)
+                                    "top priorities")
+                                   ((eq todo-show-first 'diary)
+                                    "diary items")
+                                   ((eq todo-show-first 'regexp)
+                                    "regexp items"))
+                             shortf)
+                    (setq todo-show-first 'first)))))))
+      (when (or (member file todo-visited)
+               (eq todo-show-first 'first))
+       (set-window-buffer (selected-window)
+                          (set-buffer (find-file-noselect file 'nowarn)))
+       ;; When quitting an archive file, show the corresponding
+       ;; category in the corresponding todo file, if it exists.
+       (when (assoc cat todo-categories)
+         (setq todo-category-number (todo-category-number cat)))
+       ;; If this is a new todo file, add its first category.
+       (when (zerop (buffer-size))
+         (let (cat-added)
+           (unwind-protect
+               (setq todo-category-number
+                     (todo-add-category todo-current-todo-file "")
+                     add-item todo-add-item-if-new-category
+                     cat-added t)
+             (if cat-added
+                 ;; If the category was added, save the file now, so we
+                 ;; don't risk having an empty todo file, which would
+                 ;; signal an error if we tried to visit it later,
+                 ;; since doing that looks for category boundaries.
+                 (save-buffer 0)
+               ;; If user cancels before adding the category, clean up
+               ;; and exit, so we have a fresh slate the next time.
+               (delete-file file)
+               (setq todo-files (delete file todo-files))
+               (when first-file
+                 (setq todo-default-todo-file nil
+                       todo-current-todo-file nil))
+               (kill-buffer)
+               (keyboard-quit)))))
+       (save-excursion (todo-category-select))
+       (when add-item (todo-basic-insert-item)))
+      (setq todo-show-first show-first)
+      (add-to-list 'todo-visited file))))
+
+(defun todo-save ()
+  "Save the current todo file."
+  (interactive)
+  (cond ((eq major-mode 'todo-filtered-items-mode)
+        (todo-check-filtered-items-file)
+        (todo-save-filtered-items-buffer))
+       (t
+        (save-buffer))))
+
+(defvar todo-descending-counts)
+
+(defun todo-quit ()
+  "Exit the current Todo-related buffer.
+Depending on the specific mode, this either kills the buffer or
+buries it and restores state as needed."
+  (interactive)
+  (let ((buf (current-buffer)))
+    (cond ((eq major-mode 'todo-categories-mode)
+          ;; Postpone killing buffer till after calling todo-show, to
+          ;; prevent killing todo-mode buffer.
+          (setq todo-descending-counts nil)
+          ;; Ensure todo-show calls todo-show-categories-table only on
+          ;; first invocation per file.
+          (when (eq todo-show-first 'table)
+            (add-to-list 'todo-visited todo-current-todo-file))
+          (todo-show)
+          (kill-buffer buf))
+         ((eq major-mode 'todo-filtered-items-mode)
+          (kill-buffer)
+          (unless (eq major-mode 'todo-mode) (todo-show)))
+         ((eq major-mode 'todo-archive-mode)
+          ;; Have to write a newly created archive to file to avoid
+          ;; subsequent errors.
+          (todo-save)
+          (todo-show)
+          (bury-buffer buf))
+         ((eq major-mode 'todo-mode)
+          (todo-save)
+          ;; If we just quit archive mode, just burying the buffer
+          ;; in todo-mode would return to archive.
+          (set-window-buffer (selected-window)
+                             (set-buffer (other-buffer)))
+          (bury-buffer buf)))))
+
+;; 
-----------------------------------------------------------------------------
+;;; Navigation between and within categories
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-skip-archived-categories nil
+  "Non-nil to handle categories with only archived items specially.
+
+Sequential category navigation using \\[todo-forward-category]
+or \\[todo-backward-category] skips categories that contain only
+archived items.  Other commands still recognize these categories.
+In Todo Categories mode (\\[todo-show-categories-table]) these
+categories shown in `todo-archived-only' face and pressing the
+category button visits the category in the archive instead of the
+todo file."
+  :type 'boolean
+  :group 'todo-display)
+
+(defun todo-forward-category (&optional back)
+  "Visit the numerically next category in this todo file.
+If the current category is the highest numbered, visit the first
+category.  With non-nil argument BACK, visit the numerically
+previous category (the highest numbered one, if the current
+category is the first)."
+  (interactive)
+  (setq todo-category-number
+        (1+ (mod (- todo-category-number (if back 2 0))
+                (length todo-categories))))
+  (when todo-skip-archived-categories
+    (while (and (zerop (todo-get-count 'todo))
+               (zerop (todo-get-count 'done))
+               (not (zerop (todo-get-count 'archived))))
+      (setq todo-category-number
+           (apply (if back '1- '1+) (list todo-category-number)))))
+  (todo-category-select)
+  (goto-char (point-min)))
+
+(defun todo-backward-category ()
+  "Visit the numerically previous category in this todo file.
+If the current category is the highest numbered, visit the first
+category."
+  (interactive)
+  (todo-forward-category t))
+
+(defvar todo-categories-buffer)
+
+(defun todo-jump-to-category (&optional file where)
+  "Prompt for a category in a todo file and jump to it.
+
+With non-nil FILE (interactively a prefix argument), prompt for a
+specific todo file and choose (with TAB completion) a category
+in it to jump to; otherwise, choose and jump to any category in
+either the current todo file or a file in
+`todo-category-completions-files'.
+
+Also accept a non-existing category name and ask whether to add a
+new category by that name; on confirmation, add it and jump to
+that category, and if option `todo-add-item-if-new-category' is
+non-nil (the default), then prompt for the first item.
+
+In noninteractive calls non-nil WHERE specifies either the goal
+category or its file.  If its value is `archive', the choice of
+categories is restricted to the current archive file or the
+archive you were prompted to choose; this is used by
+`todo-jump-to-archive-category'.  If its value is the name of a
+category, jump directly to that category; this is used in Todo
+Categories mode."
+  (interactive "P")
+  ;; If invoked outside of Todo mode and there is not yet any Todo
+  ;; file, initialize one.
+  (if (null todo-files)
+      (todo-show)
+    (let* ((archive (eq where 'archive))
+          (cat (unless archive where))
+          (file0 (when cat             ; We're in Todo Categories mode.
+                   ;; With non-nil `todo-skip-archived-categories'
+                   ;; jump to archive file of a category with only
+                   ;; archived items.
+                   (if (and todo-skip-archived-categories
+                            (zerop (todo-get-count 'todo cat))
+                            (zerop (todo-get-count 'done cat))
+                            (not (zerop (todo-get-count 'archived cat))))
+                       (concat (file-name-sans-extension
+                                todo-current-todo-file) ".toda")
+                     ;; Otherwise, jump to current todo file.
+                     todo-current-todo-file)))
+          (len (length todo-categories))
+          (cat+file (unless cat
+                      (todo-read-category "Jump to category: "
+                                           (if archive 'archive) file)))
+          (add-item (and todo-add-item-if-new-category
+                         (> (length todo-categories) len)))
+          (category (or cat (car cat+file))))
+      (unless cat (setq file0 (cdr cat+file)))
+      (with-current-buffer (find-file-noselect file0 'nowarn)
+       (setq todo-current-todo-file file0)
+       ;; If called from Todo Categories mode, clean up before jumping.
+       (if (string= (buffer-name) todo-categories-buffer)
+           (kill-buffer))
+       (set-window-buffer (selected-window)
+                          (set-buffer (find-buffer-visiting file0)))
+       (unless todo-global-current-todo-file
+         (setq todo-global-current-todo-file todo-current-todo-file))
+       (todo-category-number category)
+       (todo-category-select)
+       (goto-char (point-min))
+       (when add-item (todo-basic-insert-item))))))
+
+(defun todo-next-item (&optional count)
+  "Move point down to the beginning of the next item.
+With positive numerical prefix COUNT, move point COUNT items
+downward.
+
+If the category's done items are hidden, this command also moves
+point to the empty line below the last todo item from any higher
+item in the category, i.e., when invoked with or without a prefix
+argument.  If the category's done items are visible, this command
+called with a prefix argument only moves point to a lower item,
+e.g., with point on the last todo item and called with prefix 1,
+it moves point to the first done item; but if called with point
+on the last todo item without a prefix argument, it moves point
+the the empty line above the done items separator."
+  (interactive "p")
+  ;; It's not worth the trouble to allow prefix arg value < 1, since
+  ;; we have the corresponding command.
+  (cond ((and current-prefix-arg (< count 1))
+        (user-error "The prefix argument must be a positive number"))
+       (current-prefix-arg
+        (todo-forward-item count))
+       (t
+        (todo-forward-item))))
+
+(defun todo-previous-item (&optional count)
+  "Move point up to start of item with next higher priority.
+With positive numerical prefix COUNT, move point COUNT items
+upward.
+
+If the category's done items are visible, this command called
+with a prefix argument only moves point to a higher item, e.g.,
+with point on the first done item and called with prefix 1, it
+moves to the last todo item; but if called with point on the
+first done item without a prefix argument, it moves point the the
+empty line above the done items separator."
+  (interactive "p")
+  ;; Avoid moving to bob if on the first item but not at bob.
+  (when (> (line-number-at-pos) 1)
+    ;; It's not worth the trouble to allow prefix arg value < 1, since
+    ;; we have the corresponding command.
+    (cond ((and current-prefix-arg (< count 1))
+          (user-error "The prefix argument must be a positive number"))
+         (current-prefix-arg
+          (todo-backward-item count))
+         (t
+          (todo-backward-item)))))
+
+;; 
-----------------------------------------------------------------------------
+;;; Display toggle commands
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-toggle-prefix-numbers ()
+  "Hide item numbering if shown, show if hidden."
+  (interactive)
+  (save-excursion
+    (save-restriction
+      (goto-char (point-min))
+      (let* ((ov (todo-get-overlay 'prefix))
+            (show-done (re-search-forward todo-done-string-start nil t))
+            (todo-show-with-done show-done)
+            (todo-number-prefix (not (equal (overlay-get ov 'before-string)
+                                             "1 "))))
+       (if (eq major-mode 'todo-filtered-items-mode)
+           (todo-prefix-overlays)
+         (todo-category-select))))))
+
+(defun todo-toggle-view-done-items ()
+  "Show hidden or hide visible done items in current category."
+  (interactive)
+  (if (zerop (todo-get-count 'done (todo-current-category)))
+      (message "There are no done items in this category.")
+    (let ((opoint (point)))
+      (goto-char (point-min))
+      (let* ((shown (re-search-forward todo-done-string-start nil t))
+            (todo-show-with-done (not shown)))
+       (todo-category-select)
+       (goto-char opoint)
+       ;; If start of done items sections is below the bottom of the
+       ;; window, make it visible.
+       (unless shown
+         (setq shown (progn
+                       (goto-char (point-min))
+                       (re-search-forward todo-done-string-start nil t)))
+         (if (not (pos-visible-in-window-p shown))
+             (recenter)
+           (goto-char opoint)))))))
+
+(defun todo-toggle-view-done-only ()
+  "Switch between displaying only done or only todo items."
+  (interactive)
+  (setq todo-show-done-only (not todo-show-done-only))
+  (todo-category-select))
+
+(defun todo-toggle-item-highlighting ()
+  "Highlight or unhighlight the todo item the cursor is on."
+  (interactive)
+  (eval-when-compile (require 'hl-line))
+  (when (memq major-mode
+             '(todo-mode todo-archive-mode todo-filtered-items-mode))
+    (if hl-line-mode
+       (hl-line-mode -1)
+      (hl-line-mode 1))))
+
+(defun todo-toggle-item-header ()
+  "Hide or show item date-time headers in the current file.
+With done items, this hides only the done date-time string, not
+the the original date-time string."
+  (interactive)
+  (save-excursion
+    (save-restriction
+      (goto-char (point-min))
+      (let ((ov (todo-get-overlay 'header)))
+       (if ov
+           (remove-overlays 1 (1+ (buffer-size)) 'todo 'header)
+         (widen)
+         (goto-char (point-min))
+         (while (not (eobp))
+           (when (re-search-forward
+                  (concat todo-item-start
+                          "\\( " diary-time-regexp "\\)?"
+                          (regexp-quote todo-nondiary-end) "? ")
+                  nil t)
+             (setq ov (make-overlay (match-beginning 0) (match-end 0) nil t))
+             (overlay-put ov 'todo 'header)
+             (overlay-put ov 'display ""))
+           (todo-forward-item)))))))
+
+;; 
-----------------------------------------------------------------------------
+;;; File and category editing
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-add-file ()
+  "Name and initialize a new todo file.
+Interactively, prompt for a category and display it, and if
+option `todo-add-item-if-new-category' is non-nil (the default),
+prompt for the first item.
+Noninteractively, return the name of the new file."
+  (interactive)
+  (let ((prompt (concat "Enter name of new todo file "
+                       "(TAB or SPC to see current names): "))
+       file)
+    (setq file (todo-read-file-name prompt))
+    (with-current-buffer (get-buffer-create file)
+      (erase-buffer)
+      (write-region (point-min) (point-max) file nil 'nomessage nil t)
+      (kill-buffer file))
+    (setq todo-files (funcall todo-files-function))
+    (todo-reevaluate-filelist-defcustoms)
+    (if (called-interactively-p 'any)
+       (progn
+         (set-window-buffer (selected-window)
+                            (set-buffer (find-file-noselect file)))
+         (setq todo-current-todo-file file)
+         (todo-show))
+      file)))
+
+(defvar todo-edit-buffer "*Todo Edit*"
+  "Name of current buffer in Todo Edit mode.")
+
+(defun todo-edit-file ()
+  "Put current buffer in `todo-edit-mode'.
+This makes the entire file visible and the buffer writeable and
+you can use the self-insertion keys and standard Emacs editing
+commands to make changes.  To return to Todo mode, type
+\\[todo-edit-quit].  This runs a file format check, signalling
+an error if the format has become invalid.  However, this check
+cannot tell if the number of items changed, which could result in
+the file containing inconsistent information.  For this reason
+this command should be used with caution."
+  (interactive)
+  (widen)
+  (todo-edit-mode)
+  (remove-overlays)
+  (message "%s" (substitute-command-keys
+                (concat "Type \\[todo-edit-quit] to check file format "
+                        "validity and return to Todo mode.\n"))))
+
+(defun todo-add-category (&optional file cat)
+  "Add a new category to a todo file.
+
+Called interactively with prefix argument FILE, prompt for a file
+and then for a new category to add to that file, otherwise prompt
+just for a category to add to the current todo file.  After
+adding the category, visit it in Todo mode and if option
+`todo-add-item-if-new-category' is non-nil (the default), prompt
+for the first item.
+
+Non-interactively, add category CAT to file FILE; if FILE is nil,
+add CAT to the current todo file.  After adding the category,
+return the new category number."
+  (interactive "P")
+  (let (catfil file0)
+    ;; If cat is passed from caller, don't prompt, unless it is "",
+    ;; which means the file was just added and has no category yet.
+    (if (and cat (> (length cat) 0))
+       (setq file0 (or (and (stringp file) file)
+                       todo-current-todo-file))
+      (setq catfil (todo-read-category "Enter a new category name: "
+                                       'add (when (called-interactively-p 'any)
+                                              file))
+           cat (car catfil)
+           file0 (if (called-interactively-p 'any)
+                     (cdr catfil)
+                   file)))
+    (find-file file0)
+    (let ((counts (make-vector 4 0))   ; [todo diary done archived]
+         (num (1+ (length todo-categories)))
+         (buffer-read-only nil))
+      (setq todo-current-todo-file file0)
+      (setq todo-categories (append todo-categories
+                                    (list (cons cat counts))))
+      (widen)
+      (goto-char (point-max))
+      (save-excursion                  ; Save point for todo-category-select.
+       (insert todo-category-beg cat "\n\n" todo-category-done "\n"))
+      (todo-update-categories-sexp)
+      ;; If invoked by user, display the newly added category, if
+      ;; called programmatically return the category number to the
+      ;; caller.
+      (if (called-interactively-p 'any)
+         (progn
+           (setq todo-category-number num)
+           (todo-category-select)
+           (when todo-add-item-if-new-category
+             (todo-basic-insert-item)))
+       num))))
+
+(defun todo-rename-category ()
+  "Rename current todo category.
+If this file has an archive containing this category, rename the
+category there as well."
+  (interactive)
+  (let* ((cat (todo-current-category))
+        (new (read-from-minibuffer
+              (format "Rename category \"%s\" to: " cat))))
+    (setq new (todo-validate-name new 'category))
+    (let* ((ofile todo-current-todo-file)
+          (archive (concat (file-name-sans-extension ofile) ".toda"))
+          (buffers (append (list ofile)
+                           (unless (zerop (todo-get-count 'archived cat))
+                             (list archive)))))
+      (dolist (buf buffers)
+       (with-current-buffer (find-file-noselect buf)
+         (let (buffer-read-only)
+           (setq todo-categories (todo-set-categories))
+           (save-excursion
+             (save-restriction
+               (setcar (assoc cat todo-categories) new)
+               (widen)
+               (goto-char (point-min))
+               (todo-update-categories-sexp)
+               (re-search-forward (concat (regexp-quote todo-category-beg)
+                                          "\\(" (regexp-quote cat) "\\)\n")
+                                  nil t)
+               (replace-match new t t nil 1)))))))
+    (force-mode-line-update))
+  (save-excursion (todo-category-select)))
+
+(defun todo-delete-category (&optional arg)
+  "Delete current todo category provided it is empty.
+With ARG non-nil delete the category unconditionally,
+i.e. including all existing todo and done items."
+  (interactive "P")
+  (let* ((file todo-current-todo-file)
+        (cat (todo-current-category))
+        (todo (todo-get-count 'todo cat))
+        (done (todo-get-count 'done cat))
+        (archived (todo-get-count 'archived cat)))
+    (if (and (not arg)
+            (or (> todo 0) (> done 0)))
+       (message "%s" (substitute-command-keys
+                      (concat "To delete a non-empty category, "
+                              "type C-u \\[todo-delete-category].")))
+      (when (cond ((= (length todo-categories) 1)
+                  (todo-y-or-n-p
+                   (concat "This is the only category in this file; "
+                           "deleting it will also delete the file.\n"
+                           "Do you want to proceed? ")))
+                 ((> archived 0)
+                  (todo-y-or-n-p (concat "This category has archived items; "
+                                    "the archived category will remain\n"
+                                    "after deleting the todo category.  "
+                                    "Do you still want to delete it\n"
+                                    "(see `todo-skip-archived-categories' "
+                                    "for another option)? ")))
+                 (t
+                  (todo-y-or-n-p (concat "Permanently remove category \"" cat
+                                    "\"" (and arg " and all its entries")
+                                    "? "))))
+       (widen)
+       (let ((buffer-read-only)
+             (beg (re-search-backward
+                   (concat "^" (regexp-quote (concat todo-category-beg cat))
+                           "\n") nil t))
+             (end (if (re-search-forward
+                       (concat "\n\\(" (regexp-quote todo-category-beg)
+                               ".*\n\\)") nil t)
+                      (match-beginning 1)
+                    (point-max))))
+         (remove-overlays beg end)
+         (delete-region beg end)
+         (if (= (length todo-categories) 1)
+             ;; If deleted category was the only one, delete the file.
+             (progn
+               (todo-reevaluate-filelist-defcustoms)
+               ;; Skip confirming killing the archive buffer if it has been
+               ;; modified and not saved.
+               (set-buffer-modified-p nil)
+               (delete-file file)
+               (kill-buffer)
+               (message "Deleted todo file %s." file))
+           (setq todo-categories (delete (assoc cat todo-categories)
+                                              todo-categories))
+           (todo-update-categories-sexp)
+           (setq todo-category-number
+                 (1+ (mod todo-category-number (length todo-categories))))
+           (todo-category-select)
+           (goto-char (point-min))
+           (message "Deleted category %s." cat)))))))
+
+(defun todo-move-category ()
+  "Move current category to a different todo file.
+If current category has archived items, also move those to the
+archive of the file moved to, creating it if it does not exist."
+  (interactive)
+  (when (or (> (length todo-categories) 1)
+           (todo-y-or-n-p (concat "This is the only category in this file; "
+                                   "moving it will also delete the file.\n"
+                                   "Do you want to proceed? ")))
+    (let* ((ofile todo-current-todo-file)
+          (cat (todo-current-category))
+          (nfile (todo-read-file-name
+                  "Choose a todo file to move this category to: " nil t))
+          (archive (concat (file-name-sans-extension ofile) ".toda"))
+          (buffers (append (list ofile)
+                           (unless (zerop (todo-get-count 'archived cat))
+                             (list archive))))
+          new)
+      (while (equal (file-truename nfile) (file-truename ofile))
+       (setq nfile (todo-read-file-name
+                    "Choose a file distinct from this file: " nil t)))
+      (dolist (buf buffers)
+       (with-current-buffer (find-file-noselect buf)
+         (widen)
+         (goto-char (point-max))
+         (let* ((beg (re-search-backward
+                      (concat "^"
+                              (regexp-quote (concat todo-category-beg cat))
+                              "$")
+                      nil t))
+                (end (if (re-search-forward
+                          (concat "^" (regexp-quote todo-category-beg))
+                          nil t 2)
+                         (match-beginning 0)
+                       (point-max)))
+                (content (buffer-substring-no-properties beg end))
+                (counts (cdr (assoc cat todo-categories)))
+                buffer-read-only)
+           ;; Move the category to the new file.  Also update or create
+           ;; archive file if necessary.
+           (with-current-buffer
+               (find-file-noselect
+                ;; Regenerate todo-archives in case there
+                ;; is a newly created archive.
+                (if (member buf (funcall todo-files-function t))
+                    (concat (file-name-sans-extension nfile) ".toda")
+                  nfile))
+             (let* ((nfile-short (todo-short-file-name nfile))
+                    (prompt (concat
+                             (format "Todo file \"%s\" already has "
+                                     nfile-short)
+                             (format "the category \"%s\";\n" cat)
+                             "enter a new category name: "))
+                    buffer-read-only)
+               (widen)
+               (goto-char (point-max))
+               (insert content)
+               ;; If the file moved to has a category with the same
+               ;; name, rename the moved category.
+               (when (assoc cat todo-categories)
+                 (unless (member (file-truename (buffer-file-name))
+                                 (funcall todo-files-function t))
+                   (setq new (read-from-minibuffer prompt))
+                   (setq new (todo-validate-name new 'category))))
+               ;; Replace old with new name in todo and archive files.
+               (when new
+                 (goto-char (point-max))
+                 (re-search-backward
+                  (concat "^" (regexp-quote todo-category-beg)
+                          "\\(" (regexp-quote cat) "\\)$") nil t)
+                 (replace-match new nil nil nil 1)))
+             (setq todo-categories
+                   (append todo-categories (list (cons new counts))))
+             (todo-update-categories-sexp)
+             ;; If archive was just created, save it to avoid "File
+             ;; <xyz> no longer exists!" message on invoking
+             ;; `todo-view-archived-items'.
+             (unless (file-exists-p (buffer-file-name))
+               (save-buffer))
+             (todo-category-number (or new cat))
+             (todo-category-select))
+           ;; Delete the category from the old file, and if that was the
+           ;; last category, delete the file.  Also handle archive file
+           ;; if necessary.
+           (remove-overlays beg end)
+           (delete-region beg end)
+           (goto-char (point-min))
+           ;; Put point after todo-categories sexp.
+           (forward-line)
+           (if (eobp)          ; Aside from sexp, file is empty.
+               (progn
+                 ;; Skip confirming killing the archive buffer.
+                 (set-buffer-modified-p nil)
+                 (delete-file todo-current-todo-file)
+                 (kill-buffer)
+                 (when (member todo-current-todo-file todo-files)
+                   (todo-reevaluate-filelist-defcustoms)))
+             (setq todo-categories (delete (assoc cat todo-categories)
+                                            todo-categories))
+             (todo-update-categories-sexp)
+             (todo-category-select)))))
+      (set-window-buffer (selected-window)
+                        (set-buffer (find-file-noselect nfile)))
+      (todo-category-number (or new cat))
+      (todo-category-select))))
+
+(defun todo-merge-category (&optional file)
+  "Merge current category into another existing category.
+
+With prefix argument FILE, prompt for a specific todo file and
+choose (with TAB completion) a category in it to merge into;
+otherwise, choose and merge into a category in either the
+current todo file or a file in `todo-category-completions-files'.
+
+After merging, the current category's todo and done items are
+appended to the chosen goal category's todo and done items,
+respectively.  The goal category becomes the current category,
+and the previous current category is deleted.
+
+If both the first and goal categories also have archived items,
+the former are merged to the latter.  If only the first category
+has archived items, the archived category is renamed to the goal
+category."
+  (interactive "P")
+  (let* ((tfile todo-current-todo-file)
+        (cat (todo-current-category))
+        (cat+file (todo-read-category "Merge into category: " 'todo file))
+        (goal (car cat+file))
+        (gfile  (cdr cat+file))
+        (archive (concat (file-name-sans-extension (if file gfile tfile))
+                         ".toda"))
+        archived-count here)
+    ;; Merge in todo file.
+    (with-current-buffer (get-buffer (find-file-noselect tfile))
+      (widen)
+      (let* ((buffer-read-only nil)
+            (cbeg (progn
+                    (re-search-backward
+                     (concat "^" (regexp-quote todo-category-beg)) nil t)
+                    (point-marker)))
+            (tbeg (progn (forward-line) (point-marker)))
+            (dbeg (progn
+                    (re-search-forward
+                     (concat "^" (regexp-quote todo-category-done)) nil t)
+                    (forward-line) (point-marker)))
+            ;; Omit empty line between todo and done items.
+            (tend (progn (forward-line -2) (point-marker)))
+            (cend (progn
+                    (if (re-search-forward
+                         (concat "^" (regexp-quote todo-category-beg)) nil t)
+                        (progn
+                          (goto-char (match-beginning 0))
+                          (point-marker))
+                      (point-max-marker))))
+            (todo (buffer-substring-no-properties tbeg tend))
+            (done (buffer-substring-no-properties dbeg cend)))
+       (goto-char (point-min))
+       ;; Merge any todo items.
+       (unless (zerop (length todo))
+         (re-search-forward
+          (concat "^" (regexp-quote (concat todo-category-beg goal)) "$")
+          nil t)
+         (re-search-forward
+          (concat "^" (regexp-quote todo-category-done)) nil t)
+         (forward-line -1)
+         (setq here (point-marker))
+         (insert todo)
+         (todo-update-count 'todo (todo-get-count 'todo cat) goal))
+       ;; Merge any done items.
+       (unless (zerop (length done))
+         (goto-char (if (re-search-forward
+                         (concat "^" (regexp-quote todo-category-beg)) nil t)
+                        (match-beginning 0)
+                      (point-max)))
+         (when (zerop (length todo)) (setq here (point-marker)))
+         (insert done)
+         (todo-update-count 'done (todo-get-count 'done cat) goal))
+       (remove-overlays cbeg cend)
+       (delete-region cbeg cend)
+       (setq todo-categories (delete (assoc cat todo-categories)
+                                      todo-categories))
+       (todo-update-categories-sexp)
+       (mapc (lambda (m) (set-marker m nil)) (list cbeg tbeg dbeg tend cend))))
+    (when (file-exists-p archive)
+      ;; Merge in archive file.
+      (with-current-buffer (get-buffer (find-file-noselect archive))
+       (widen)
+       (goto-char (point-min))
+       (let ((buffer-read-only nil)
+             (cbeg (save-excursion
+                     (when (re-search-forward
+                            (concat "^" (regexp-quote
+                                         (concat todo-category-beg cat)) "$")
+                            nil t)
+                       (goto-char (match-beginning 0))
+                       (point-marker))))
+             (gbeg (save-excursion
+                     (when (re-search-forward
+                            (concat "^" (regexp-quote
+                                         (concat todo-category-beg goal)) "$")
+                            nil t)
+                       (goto-char (match-beginning 0))
+                       (point-marker))))
+             cend carch)
+         (when cbeg
+           (setq archived-count (todo-get-count 'done cat))
+           (setq cend (save-excursion
+                        (if (re-search-forward
+                             (concat "^" (regexp-quote todo-category-beg))
+                             nil t)
+                            (match-beginning 0)
+                          (point-max))))
+           (setq carch (save-excursion (goto-char cbeg) (forward-line)
+                         (buffer-substring-no-properties (point) cend)))
+           ;; If both categories of the merge have archived items, merge the
+           ;; source items to the goal items, else "merge" by renaming the
+           ;; source category to goal.
+           (if gbeg
+               (progn
+                 (goto-char (if (re-search-forward
+                                 (concat "^" (regexp-quote todo-category-beg))
+                                 nil t)
+                                (match-beginning 0)
+                              (point-max)))
+                 (insert carch)
+                 (remove-overlays cbeg cend)
+                 (delete-region cbeg cend))
+             (goto-char cbeg)
+             (search-forward cat)
+             (replace-match goal))
+           (setq todo-categories (todo-make-categories-list t))
+           (todo-update-categories-sexp)))))
+    (with-current-buffer (get-file-buffer tfile)
+      (when archived-count
+       (unless (zerop archived-count)
+         (todo-update-count 'archived archived-count goal)
+         (todo-update-categories-sexp)))
+      (todo-category-number goal)
+      ;; If there are only merged done items, show them.
+      (let ((todo-show-with-done (zerop (todo-get-count 'todo goal))))
+       (todo-category-select)
+       ;; Put point on the first merged item.
+       (goto-char here)))
+    (set-marker here nil)))
+
+;; 
-----------------------------------------------------------------------------
+;;; Item editing
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-include-in-diary nil
+  "Non-nil to allow new todo items to be included in the diary."
+  :type 'boolean
+  :group 'todo-edit)
+
+(defcustom todo-diary-nonmarking nil
+  "Non-nil to insert new todo diary items as nonmarking by default.
+This appends `diary-nonmarking-symbol' to the front of an item on
+insertion provided it doesn't begin with `todo-nondiary-marker'."
+  :type 'boolean
+  :group 'todo-edit)
+
+(defcustom todo-always-add-time-string nil
+  "Non-nil adds current time to a new item's date header by default.
+When the todo insertion commands have a non-nil \"maybe-notime\"
+argument, this reverses the effect of
+`todo-always-add-time-string': if t, these commands omit the
+current time, if nil, they include it."
+  :type 'boolean
+  :group 'todo-edit)
+
+(defcustom todo-use-only-highlighted-region t
+  "Non-nil to enable inserting only highlighted region as new item."
+  :type 'boolean
+  :group 'todo-edit)
+
+(defcustom todo-item-mark "*"
+  "String used to mark items.
+To ensure item marking works, change the value of this option
+only when no items are marked."
+  :type '(string :validate
+                (lambda (widget)
+                  (when (string= (widget-value widget) todo-prefix)
+                    (widget-put
+                     widget :error
+                     "Invalid value: must be distinct from `todo-prefix'")
+                    widget)))
+  :set (lambda (symbol value)
+        (custom-set-default symbol (propertize value 'face 'todo-mark)))
+  :group 'todo-edit)
+
+(defcustom todo-comment-string "COMMENT"
+  "String inserted before optional comment appended to done item."
+  :type 'string
+  :initialize 'custom-initialize-default
+  :set 'todo-reset-comment-string
+  :group 'todo-edit)
+
+(defcustom todo-undo-item-omit-comment 'ask
+  "Whether to omit done item comment on undoing the item.
+Nil means never omit the comment, t means always omit it, `ask'
+means prompt user and omit comment only on confirmation."
+  :type '(choice (const :tag "Never" nil)
+                (const :tag "Always" t)
+                (const :tag "Ask" ask))
+  :group 'todo-edit)
+
+(defun todo-toggle-mark-item (&optional n)
+  "Mark item with `todo-item-mark' if unmarked, otherwise unmark it.
+With a positive numerical prefix argument N, change the
+marking of the next N items."
+  (interactive "p")
+  (when (todo-item-string)
+    (unless (> n 1) (setq n 1))
+    (dotimes (i n)
+      (let* ((cat (todo-current-category))
+            (marks (assoc cat todo-categories-with-marks))
+            (ov (progn
+                  (unless (looking-at todo-item-start)
+                    (todo-item-start))
+                  (todo-get-overlay 'prefix)))
+            (pref (overlay-get ov 'before-string)))
+       (if (todo-marked-item-p)
+           (progn
+             (overlay-put ov 'before-string (substring pref 1))
+             (if (= (cdr marks) 1)     ; Deleted last mark in this category.
+                 (setq todo-categories-with-marks
+                       (assq-delete-all cat todo-categories-with-marks))
+               (setcdr marks (1- (cdr marks)))))
+         (overlay-put ov 'before-string (concat todo-item-mark pref))
+         (if marks
+             (setcdr marks (1+ (cdr marks)))
+           (push (cons cat 1) todo-categories-with-marks))))
+      (todo-forward-item))))
+
+(defun todo-mark-category ()
+  "Mark all visiblw items in this category with `todo-item-mark'."
+  (interactive)
+  (let* ((cat (todo-current-category))
+        (marks (assoc cat todo-categories-with-marks)))
+    (save-excursion
+      (goto-char (point-min))
+      (while (not (eobp))
+       (let* ((ov (todo-get-overlay 'prefix))
+              (pref (overlay-get ov 'before-string)))
+         (unless (todo-marked-item-p)
+           (overlay-put ov 'before-string (concat todo-item-mark pref))
+           (if marks
+               (setcdr marks (1+ (cdr marks)))
+             (push (cons cat 1) todo-categories-with-marks))))
+       (todo-forward-item)))))
+
+(defun todo-unmark-category ()
+  "Remove `todo-item-mark' from all visible items in this category."
+  (interactive)
+  (let* ((cat (todo-current-category))
+        (marks (assoc cat todo-categories-with-marks)))
+    (save-excursion
+      (goto-char (point-min))
+      (while (not (eobp))
+       (let* ((ov (todo-get-overlay 'prefix))
+              ;; No overlay on empty line between todo and done items.
+              (pref (when ov (overlay-get ov 'before-string))))
+         (when (todo-marked-item-p)
+           (overlay-put ov 'before-string (substring pref 1)))
+         (todo-forward-item))))
+    (setq todo-categories-with-marks
+         (delq marks todo-categories-with-marks))))
+
+(defvar todo-date-from-calendar nil
+  "Helper variable for setting item date from the Emacs Calendar.")
+
+(defun todo-basic-insert-item (&optional arg diary nonmarking date-type time
+                                   region-or-here)
+  "Insert a new todo item into a category.
+This is the function from which the generated Todo mode item
+insertion commands derive.
+
+The generated commands have mnenomic key bindings based on the
+arguments' values and their order in the command's argument list,
+as follows: (1) for DIARY `d', (2) for NONMARKING `k', (3) for
+DATE-TYPE either `c' for calendar or `d' for date or `n' for
+weekday name, (4) for TIME `t', (5) for REGION-OR-HERE either `r'
+for region or `h' for here.  Sequences of these keys are appended
+to the insertion prefix key `i'.  Keys that allow a following
+key (i.e., any but `r' or `h') must be doubled when used finally.
+For example, the command bound to the key sequence `i y h' will
+insert a new item with today's date, marked according to the
+DIARY argument described below, and with priority according to
+the HERE argument; `i y y' does the same except that the priority
+is not given by HERE but by prompting.
+
+In command invocations, ARG is passed as a prefix argument as
+follows.  With no prefix argument, add the item to the current
+category; with one prefix argument (`C-u'), prompt for a category
+from the current todo file; with two prefix arguments (`C-u C-u'),
+first prompt for a todo file, then a category in that file.  If
+a non-existing category is entered, ask whether to add it to the
+todo file; if answered affirmatively, add the category and
+insert the item there.
+
+The remaining arguments are set or left nil by the generated item
+insertion commands; their meanings are described in the follows
+paragraphs.
+
+When argument DIARY is non-nil, this overrides the intent of the
+user option `todo-include-in-diary' for this item: if
+`todo-include-in-diary' is nil, include the item in the Fancy
+Diary display, and if it is non-nil, exclude the item from the
+Fancy Diary display.  When DIARY is nil, `todo-include-in-diary'
+has its intended effect.
+
+When the item is included in the Fancy Diary display and the
+argument NONMARKING is non-nil, this overrides the intent of the
+user option `todo-diary-nonmarking' for this item: if
+`todo-diary-nonmarking' is nil, append `diary-nonmarking-symbol'
+to the item, and if it is non-nil, omit `diary-nonmarking-symbol'.
+
+The argument DATE-TYPE determines the content of the item's
+mandatory date header string and how it is added:
+- If DATE-TYPE is the symbol `calendar', the Calendar pops up and
+  when the user puts the cursor on a date and hits RET, that
+  date, in the format set by `calendar-date-display-form',
+  becomes the date in the header.
+- If DATE-TYPE is a string matching the regexp
+  `todo-date-pattern', that string becomes the date in the
+  header.  This case is for the command
+  `todo-insert-item-from-calendar' which is called from the
+  Calendar.
+- If DATE-TYPE is the symbol `date', the header contains the date
+  in the format set by `calendar-date-display-form', with year,
+  month and day individually prompted for (month with tab
+  completion).
+- If DATE-TYPE is the symbol `dayname' the header contains a
+  weekday name instead of a date, prompted for with tab
+  completion.
+- If DATE-TYPE has any other value (including nil or none) the
+  header contains the current date (in the format set by
+  `calendar-date-display-form').
+
+With non-nil argument TIME prompt for a time string, which must
+match `diary-time-regexp'.  Typing `<return>' at the prompt
+returns the current time, if the user option
+`todo-always-add-time-string' is non-nil, otherwise the empty
+string (i.e., no time string).  If TIME is absent or nil, add or
+omit the current time string according as
+`todo-always-add-time-string' is non-nil or nil, respectively.
+
+The argument REGION-OR-HERE determines the source and location of
+the new item:
+- If the REGION-OR-HERE is the symbol `here', prompt for the text of
+  the new item and, if the command was invoked with point in the todo
+  items section of the current category, give the new item the
+  priority of the item at point, lowering the latter's priority and
+  the priority of the remaining items.  If point is in the done items
+  section of the category, insert the new item as the first todo item
+  in the category.  Likewise, if the command with `here' is invoked
+  outside of the current category, jump to the chosen category and
+  insert the new item as the first item in the category.
+- If REGION-OR-HERE is the symbol `region', use the region of the
+  current buffer as the text of the new item, depending on the
+  value of user option `todo-use-only-highlighted-region': if
+  this is non-nil, then use the region only when it is
+  highlighted; otherwise, use the region regardless of
+  highlighting.  An error is signalled if there is no region in
+  the current buffer.  Prompt for the item's priority in the
+  category (an integer between 1 and one more than the number of
+  items in the category), and insert the item accordingly.
+- If REGION-OR-HERE has any other value (in particular, nil or
+  none), prompt for the text and the item's priority, and insert
+  the item accordingly."
+  ;; If invoked outside of Todo mode and there is not yet any Todo
+  ;; file, initialize one.
+  (if (null todo-files)
+      (todo-show)
+    (let ((region (eq region-or-here 'region))
+         (here (eq region-or-here 'here)))
+      (when region
+       (let (use-empty-active-region)
+         (unless (and todo-use-only-highlighted-region (use-region-p))
+           (user-error "There is no active region"))))
+      (let* ((obuf (current-buffer))
+            (ocat (todo-current-category))
+            (opoint (point))
+            (todo-mm (eq major-mode 'todo-mode))
+            (cat+file (cond ((equal arg '(4))
+                             (todo-read-category "Insert in category: "))
+                            ((equal arg '(16))
+                             (todo-read-category "Insert in category: "
+                                                  nil 'file))
+                            (t
+                             (cons (todo-current-category)
+                                   (or todo-current-todo-file
+                                       (and todo-show-current-file
+                                            todo-global-current-todo-file)
+                                       (todo-absolute-file-name
+                                        todo-default-todo-file))))))
+            (cat (car cat+file))
+            (file (cdr cat+file))
+            (new-item (if region
+                          (buffer-substring-no-properties
+                           (region-beginning) (region-end))
+                        (read-from-minibuffer "Todo item: ")))
+            (date-string (cond
+                          ((eq date-type 'date)
+                           (todo-read-date))
+                          ((eq date-type 'dayname)
+                           (todo-read-dayname))
+                          ((eq date-type 'calendar)
+                           (setq todo-date-from-calendar t)
+                           (or (todo-set-date-from-calendar)
+                               ;; If user exits Calendar before choosing
+                               ;; a date, cancel item insertion.
+                               (keyboard-quit)))
+                          ((and (stringp date-type)
+                                (string-match todo-date-pattern date-type))
+                           (setq todo-date-from-calendar date-type)
+                           (todo-set-date-from-calendar))
+                          (t
+                           (calendar-date-string
+                            (calendar-current-date) t t))))
+            (time-string (or (and time (todo-read-time))
+                             (and todo-always-add-time-string
+                                  (substring (current-time-string) 11 16)))))
+       (setq todo-date-from-calendar nil)
+       (find-file-noselect file 'nowarn)
+       (set-window-buffer (selected-window)
+                          (set-buffer (find-buffer-visiting file)))
+       ;; If this command was invoked outside of a Todo mode buffer,
+       ;; the call to todo-current-category above returned nil.  If
+       ;; we just entered Todo mode now, then cat was set to the
+       ;; file's first category, but if todo-mode was already
+       ;; enabled, cat did not get set, so we have to do that.
+       (unless cat
+         (setq cat (todo-current-category)))
+       (setq todo-current-todo-file file)
+       (unless todo-global-current-todo-file
+         (setq todo-global-current-todo-file todo-current-todo-file))
+       (let ((buffer-read-only nil)
+             (called-from-outside (not (and todo-mm (equal cat ocat))))
+             done-only item-added)
+         (setq new-item
+               ;; Add date, time and diary marking as required.
+               (concat (if (not (and diary (not todo-include-in-diary)))
+                           todo-nondiary-start
+                         (when (and nonmarking (not todo-diary-nonmarking))
+                           diary-nonmarking-symbol))
+                       date-string (when (and time-string ; Can be empty.
+                                              (not (zerop (length
+                                                           time-string))))
+                                     (concat " " time-string))
+                       (when (not (and diary (not todo-include-in-diary)))
+                         todo-nondiary-end)
+                       " " new-item))
+         ;; Indent newlines inserted by C-q C-j if nonspace char follows.
+         (setq new-item (replace-regexp-in-string "\\(\n\\)[^[:blank:]]"
+                                                  "\n\t" new-item nil nil 1))
+         (unwind-protect
+             (progn
+               ;; Make sure the correct category is selected.  There
+               ;; are two cases: (i) we just visited the file, so no
+               ;; category is selected yet, or (ii) we invoked
+               ;; insertion "here" from outside the category we want
+               ;; to insert in (with priority insertion, category
+               ;; selection is done by todo-set-item-priority).
+               (when (or (= (- (point-max) (point-min)) (buffer-size))
+                         (and here called-from-outside))
+                 (todo-category-number cat)
+                 (todo-category-select))
+               ;; If only done items are displayed in category,
+               ;; toggle to todo items before inserting new item.
+               (when (save-excursion
+                       (goto-char (point-min))
+                       (looking-at todo-done-string-start))
+                 (setq done-only t)
+                 (todo-toggle-view-done-only))
+               (if here
+                   (progn
+                     ;; If command was invoked with point in done
+                     ;; items section or outside of the current
+                     ;; category, can't insert "here", so to be
+                     ;; useful give new item top priority.
+                     (when (or (todo-done-item-section-p)
+                               called-from-outside
+                               done-only)
+                       (goto-char (point-min)))
+                     (todo-insert-with-overlays new-item))
+                 (todo-set-item-priority new-item cat t))
+               (setq item-added t))
+           ;; If user cancels before setting priority, restore
+           ;; display.
+           (unless item-added
+             (if ocat
+                 (progn
+                   (unless (equal cat ocat)
+                     (todo-category-number ocat)
+                     (todo-category-select))
+                   (and done-only (todo-toggle-view-done-only)))
+               (set-window-buffer (selected-window) (set-buffer obuf)))
+             (goto-char opoint))
+           ;; If the todo items section is not visible when the
+           ;; insertion command is called (either because only done
+           ;; items were shown or because the category was not in the
+           ;; current buffer), then if the item is inserted at the
+           ;; end of the category, point is at eob and eob at
+           ;; window-start, so that higher priority todo items are
+           ;; out of view.  So we recenter to make sure the todo
+           ;; items are displayed in the window.
+           (when item-added (recenter)))
+         (todo-update-count 'todo 1)
+         (if (or diary todo-include-in-diary) (todo-update-count 'diary 1))
+         (todo-update-categories-sexp))))))
+
+(defun todo-set-date-from-calendar ()
+  "Return string of date chosen from Calendar."
+  (cond ((and (stringp todo-date-from-calendar)
+             (string-match todo-date-pattern todo-date-from-calendar))
+        todo-date-from-calendar)
+       (todo-date-from-calendar
+        (let (calendar-view-diary-initially-flag)
+          (calendar))                  ; *Calendar* is now current buffer.
+        (define-key calendar-mode-map [remap newline] 'exit-recursive-edit)
+        ;; If user exits Calendar before choosing a date, clean up properly.
+        (define-key calendar-mode-map
+          [remap calendar-exit] (lambda ()
+                                   (interactive)
+                                   (progn
+                                     (calendar-exit)
+                                     (exit-recursive-edit))))
+        (message "Put cursor on a date and type <return> to set it.")
+        (recursive-edit)
+        (unwind-protect
+            (when (equal (buffer-name) calendar-buffer)
+              (setq todo-date-from-calendar
+                    (calendar-date-string (calendar-cursor-to-date t) t t))
+              (calendar-exit)
+              todo-date-from-calendar)
+          (define-key calendar-mode-map [remap newline] nil)
+          (define-key calendar-mode-map [remap calendar-exit] nil)
+          (unless (zerop (recursion-depth)) (exit-recursive-edit))
+          (when (stringp todo-date-from-calendar)
+            todo-date-from-calendar)))))
+
+(defun todo-insert-item-from-calendar (&optional arg)
+  "Prompt for and insert a new item with date selected from calendar.
+Invoked without prefix argument ARG, insert the item into the
+current category, without one prefix argument, prompt for the
+category from the current todo file or from one listed in
+`todo-category-completions-files'; with two prefix arguments,
+prompt for a todo file and then for a category in it."
+  (interactive "P")
+  (setq todo-date-from-calendar
+       (calendar-date-string (calendar-cursor-to-date t) t t))
+  (calendar-exit)
+  (todo-basic-insert-item arg nil nil todo-date-from-calendar))
+
+(define-key calendar-mode-map "it" 'todo-insert-item-from-calendar)
+
+(defun todo-copy-item ()
+  "Copy item at point and insert the copy as a new item."
+  (interactive)
+  (unless (or (todo-done-item-p) (looking-at "^$"))
+    (let ((copy (todo-item-string))
+         (diary-item (todo-diary-item-p)))
+      (todo-set-item-priority copy (todo-current-category) t)
+      (todo-update-count 'todo 1)
+      (when diary-item (todo-update-count 'diary 1))
+      (todo-update-categories-sexp))))
+
+(defun todo-delete-item ()
+  "Delete at least one item in this category.
+If there are marked items, delete all of these; otherwise, delete
+the item at point."
+  (interactive)
+  (let (ov)
+    (unwind-protect
+       (let* ((cat (todo-current-category))
+              (marked (assoc cat todo-categories-with-marks))
+              (item (unless marked (todo-item-string)))
+              (answer (if marked
+                          (todo-y-or-n-p
+                           "Permanently delete all marked items? ")
+                        (when item
+                          (setq ov (make-overlay
+                                    (save-excursion (todo-item-start))
+                                    (save-excursion (todo-item-end))))
+                          (overlay-put ov 'face 'todo-search)
+                          (todo-y-or-n-p "Permanently delete this item? "))))
+              buffer-read-only)
+         (when answer
+           (and marked (goto-char (point-min)))
+           (catch 'done
+             (while (not (eobp))
+               (if (or (and marked (todo-marked-item-p)) item)
+                   (progn
+                     (if (todo-done-item-p)
+                         (todo-update-count 'done -1)
+                       (todo-update-count 'todo -1 cat)
+                       (and (todo-diary-item-p)
+                            (todo-update-count 'diary -1)))
+                     (if ov (delete-overlay ov))
+                     (todo-remove-item)
+                     ;; Don't leave point below last item.
+                     (and item (bolp) (eolp) (< (point-min) (point-max))
+                          (todo-backward-item))
+                     (when item
+                       (throw 'done (setq item nil))))
+                 (todo-forward-item))))
+           (when marked
+             (setq todo-categories-with-marks
+                   (assq-delete-all cat todo-categories-with-marks)))
+           (todo-update-categories-sexp)
+           (todo-prefix-overlays)))
+      (if ov (delete-overlay ov)))))
+
+(defun todo-edit-item (&optional arg)
+  "Edit the todo item at point.
+With non-nil prefix argument ARG, include the item's date/time
+header, making it also editable; otherwise, include only the item
+content.
+
+If the item consists of only one logical line, edit it in the
+minibuffer; otherwise, edit it in Todo Edit mode."
+  (interactive "P")
+  (when (todo-item-string)
+    (let* ((opoint (point))
+          (start (todo-item-start))
+          (item-beg (progn
+                      (re-search-forward
+                       (concat todo-date-string-start todo-date-pattern
+                               "\\( " diary-time-regexp "\\)?"
+                               (regexp-quote todo-nondiary-end) "?")
+                       (line-end-position) t)
+                      (1+ (- (point) start))))
+          (header (substring (todo-item-string) 0 item-beg))
+          (item (if arg (todo-item-string)
+                  (substring (todo-item-string) item-beg)))
+          (multiline (> (length (split-string item "\n")) 1))
+          (buffer-read-only nil))
+      (if multiline
+         (todo-edit-multiline-item)
+       (let ((new (concat (if arg "" header)
+                          (read-string "Edit: " (if arg
+                                                    (cons item item-beg)
+                                                  (cons item 0))))))
+         (when arg
+           (while (not (string-match (concat todo-date-string-start
+                                             todo-date-pattern) new))
+             (setq new (read-from-minibuffer
+                        "Item must start with a date: " new))))
+         ;; Ensure lines following hard newlines are indented.
+         (setq new (replace-regexp-in-string "\\(\n\\)[^[:blank:]]"
+                                             "\n\t" new nil nil 1))
+         ;; If user moved point during editing, make sure it moves back.
+         (goto-char opoint)
+         (todo-remove-item)
+         (todo-insert-with-overlays new)
+         (move-to-column item-beg))))))
+
+(defun todo-edit-multiline-item ()
+  "Edit current todo item in Todo Edit mode.
+Use of newlines invokes `todo-indent' to insure compliance with
+the format of Diary entries."
+  (interactive)
+  (when (todo-item-string)
+    (let ((buf todo-edit-buffer))
+      (set-window-buffer (selected-window)
+                        (set-buffer (make-indirect-buffer (buffer-name) buf)))
+      (narrow-to-region (todo-item-start) (todo-item-end))
+      (todo-edit-mode)
+      (message "%s" (substitute-command-keys
+                    (concat "Type \\[todo-edit-quit] "
+                            "to return to Todo mode.\n"))))))
+
+(defun todo-edit-quit ()
+  "Return from Todo Edit mode to Todo mode.
+If the item contains hard line breaks, make sure the following
+lines are indented by `todo-indent-to-here' to conform to diary
+format.
+
+If the whole file was in Todo Edit mode, check before returning
+whether the file is still a valid todo file and if so, also
+recalculate the todo file's categories sexp, in case changes were
+made in the number or names of categories."
+  (interactive)
+  (if (> (buffer-size) (- (point-max) (point-min)))
+      ;; We got here via `e m'.
+      (let ((item (buffer-string))
+           (regex "\\(\n\\)[^[:blank:]]")
+           (buf (buffer-base-buffer)))
+       (while (not (string-match (concat todo-date-string-start
+                                         todo-date-pattern) item))
+         (setq item (read-from-minibuffer
+                    "Item must start with a date: " item)))
+       ;; Ensure lines following hard newlines are indented.
+       (when (string-match regex (buffer-string))
+         (setq item (replace-regexp-in-string regex "\n\t" item nil nil 1))
+         (delete-region (point-min) (point-max))
+         (insert item))
+       (kill-buffer)
+       (unless (eq (current-buffer) buf)
+         (set-window-buffer (selected-window) (set-buffer buf))))
+    ;; We got here via `F e'.
+    (when (todo-check-format)
+      ;; FIXME: separate out sexp check?
+      ;; If manual editing makes e.g. item counts change, have to
+      ;; call this to update todo-categories, but it restores
+      ;; category order to list order.
+      ;; (todo-repair-categories-sexp)
+      ;; Compare (todo-make-categories-list t) with sexp and if
+      ;; different ask (todo-update-categories-sexp) ?
+      (todo-mode)
+      (let* ((cat-beg (concat "^" (regexp-quote todo-category-beg)
+                             "\\(.*\\)$"))
+            (curline (buffer-substring-no-properties
+                      (line-beginning-position) (line-end-position)))
+            (cat (cond ((string-match cat-beg curline)
+                        (match-string-no-properties 1 curline))
+                       ((or (re-search-backward cat-beg nil t)
+                            (re-search-forward cat-beg nil t))
+                        (match-string-no-properties 1)))))
+       (todo-category-number cat)
+       (todo-category-select)
+       (goto-char (point-min))))))
+
+(defun todo-basic-edit-item-header (what &optional inc)
+  "Function underlying commands to edit item date/time header.
+
+The argument WHAT (passed by invoking commands) specifies what
+part of the header to edit; possible values are these symbols:
+`date', to edit the year, month, and day of the date string;
+`time', to edit just the time string; `calendar', to select the
+date from the Calendar; `today', to set the date to today's date;
+`dayname', to set the date string to the name of a day or to
+change the day name; and `year', `month' or `day', to edit only
+these respective parts of the date string (`day' is the number of
+the given day of the month, and `month' is either the name of the
+given month or its number, depending on the value of
+`calendar-date-display-form').
+
+The optional argument INC is a positive or negative integer
+\(passed by invoking commands as a numerical prefix argument)
+that in conjunction with the WHAT values `year', `month' or
+`day', increments or decrements the specified date string
+component by the specified number of suitable units, i.e., years,
+months, or days, with automatic adjustment of the other date
+string components as necessary.
+
+If there are marked items, apply the same edit to all of these;
+otherwise, edit just the item at point."
+  (let* ((cat (todo-current-category))
+        (marked (assoc cat todo-categories-with-marks))
+        (first t)
+        (todo-date-from-calendar t)
+        (buffer-read-only nil)
+        ndate ntime year monthname month day
+        dayname)       ; Needed by calendar-date-display-form.
+    (save-excursion
+      (or (and marked (goto-char (point-min))) (todo-item-start))
+      (catch 'end
+       (while (not (eobp))
+         (and marked
+              (while (not (todo-marked-item-p))
+                (todo-forward-item)
+                (and (eobp) (throw 'end nil))))
+         (re-search-forward (concat todo-date-string-start "\\(?1:"
+                                    todo-date-pattern
+                                    "\\)\\(?2: " diary-time-regexp "\\)?"
+                                    (regexp-quote todo-nondiary-end) "?")
+                            (line-end-position) t)
+         (let* ((odate (match-string-no-properties 1))
+                (otime (match-string-no-properties 2))
+                (odayname (match-string-no-properties 5))
+                (omonthname (match-string-no-properties 6))
+                (omonth (match-string-no-properties 7))
+                (oday (match-string-no-properties 8))
+                (oyear (match-string-no-properties 9))
+                (tmn-array todo-month-name-array)
+                (mlist (append tmn-array nil))
+                (tma-array todo-month-abbrev-array)
+                (mablist (append tma-array nil))
+                (yy (and oyear (unless (string= oyear "*")
+                                 (string-to-number oyear))))
+                (mm (or (and omonth (unless (string= omonth "*")
+                                      (string-to-number omonth)))
+                        (1+ (- (length mlist)
+                               (length (or (member omonthname mlist)
+                                           (member omonthname mablist)))))))
+                (dd (and oday (unless (string= oday "*")
+                                (string-to-number oday)))))
+           ;; If there are marked items, use only the first to set
+           ;; header changes, and apply these to all marked items.
+           (when first
+             (cond
+              ((eq what 'date)
+               (setq ndate (todo-read-date)))
+              ((eq what 'calendar)
+               (setq ndate (save-match-data (todo-set-date-from-calendar))))
+              ((eq what 'today)
+               (setq ndate (calendar-date-string (calendar-current-date) t t)))
+              ((eq what 'dayname)
+               (setq ndate (todo-read-dayname)))
+              ((eq what 'time)
+               (setq ntime (save-match-data (todo-read-time)))
+               (when (> (length ntime) 0)
+                 (setq ntime (concat " " ntime))))
+              ;; When date string consists only of a day name,
+              ;; passing other date components is a noop.
+              ((and odayname (memq what '(year month day))))
+              ((eq what 'year)
+               (setq day oday
+                     monthname omonthname
+                     month omonth
+                     year (cond ((not current-prefix-arg)
+                                 (todo-read-date 'year))
+                                ((string= oyear "*")
+                                 (user-error "Cannot increment *"))
+                                (t
+                                 (number-to-string (+ yy inc))))))
+              ((eq what 'month)
+               (setf day oday
+                     year oyear
+                     (if (memq 'month calendar-date-display-form)
+                         month
+                       monthname)
+                     (cond ((not current-prefix-arg)
+                            (todo-read-date 'month))
+                           ((or (string= omonth "*") (= mm 13))
+                            (user-error "Cannot increment *"))
+                           (t
+                            (let ((mminc (+ mm inc)))
+                              ;; Increment or decrement month by INC
+                              ;; modulo 12.
+                              (setq mm (% mminc 12))
+                              ;; If result is 0, make month December.
+                              (setq mm (if (= mm 0) 12 (abs mm)))
+                              ;; Adjust year if necessary.
+                              (setq year (or (and (cond ((> mminc 12)
+                                                         (+ yy (/ mminc 12)))
+                                                        ((< mminc 1)
+                                                         (- yy (/ mminc 12) 1))
+                                                        (t yy))
+                                                  (number-to-string yy))
+                                             oyear)))
+                            ;; Return the changed numerical month as
+                            ;; a string or the corresponding month name.
+                            (if omonth
+                                (number-to-string mm)
+                              (aref tma-array (1- mm))))))
+               (let ((yy (string-to-number year)) ; 0 if year is "*".
+                     ;; When mm is 13 (corresponding to "*" as value
+                     ;; of month), this raises an args-out-of-range
+                     ;; error in calendar-last-day-of-month, so use 1
+                     ;; (corresponding to January) to get 31 days.
+                     (mm (if (= mm 13) 1 mm)))
+                 (if (> (string-to-number day)
+                        (calendar-last-day-of-month mm yy))
+                     (user-error "%s %s does not have %s days"
+                            (aref tmn-array (1- mm))
+                            (if (= mm 2) yy "") day))))
+              ((eq what 'day)
+               (setq year oyear
+                     month omonth
+                     monthname omonthname
+                     day (cond
+                          ((not current-prefix-arg)
+                           (todo-read-date 'day mm oyear))
+                          ((string= oday "*")
+                           (user-error "Cannot increment *"))
+                          ((or (string= omonth "*") (string= omonthname "*"))
+                           (setq dd (+ dd inc))
+                           (if (> dd 31)
+                               (user-error "A month cannot have more than 31 
days")
+                             (number-to-string dd)))
+                          ;; Increment or decrement day by INC,
+                          ;; adjusting month and year if necessary
+                          ;; (if year is "*" assume current year to
+                          ;; calculate adjustment).
+                          (t
+                           (let* ((yy (or yy (calendar-extract-year
+                                              (calendar-current-date))))
+                                  (date (calendar-gregorian-from-absolute
+                                         (+ (calendar-absolute-from-gregorian
+                                             (list mm dd yy)) inc)))
+                                  (adjmm (nth 0 date)))
+                             ;; Set year and month(name) to adjusted values.
+                             (unless (string= year "*")
+                               (setq year (number-to-string (nth 2 date))))
+                             (if month
+                                 (setq month (number-to-string adjmm))
+                               (setq monthname (aref tma-array (1- adjmm))))
+                             ;; Return changed numerical day as a string.
+                             (number-to-string (nth 1 date)))))))))
+           (unless odayname
+             ;; If year, month or day date string components were
+             ;; changed, rebuild the date string.
+             (when (memq what '(year month day))
+               (setq ndate (mapconcat 'eval calendar-date-display-form ""))))
+           (when ndate (replace-match ndate nil nil nil 1))
+           ;; Add new time string to the header, if it was supplied.
+           (when ntime
+             (if otime
+                 (replace-match ntime nil nil nil 2)
+               (goto-char (match-end 1))
+               (insert ntime)))
+           (setq todo-date-from-calendar nil)
+           (setq first nil))
+         ;; Apply the changes to the first marked item header to the
+         ;; remaining marked items.  If there are no marked items,
+         ;; we're finished.
+         (if marked
+             (todo-forward-item)
+           (goto-char (point-max))))))))
+
+(defun todo-edit-item-header ()
+  "Interactively edit at least the date of item's date/time header.
+If user option `todo-always-add-time-string' is non-nil, also
+edit item's time string."
+  (interactive)
+  (todo-basic-edit-item-header 'date)
+  (when todo-always-add-time-string
+    (todo-edit-item-time)))
+
+(defun todo-edit-item-time ()
+  "Interactively edit the time string of item's date/time header."
+  (interactive)
+  (todo-basic-edit-item-header 'time))
+
+(defun todo-edit-item-date-from-calendar ()
+  "Interactively edit item's date using the Calendar."
+  (interactive)
+  (todo-basic-edit-item-header 'calendar))
+
+(defun todo-edit-item-date-to-today ()
+  "Set item's date to today's date."
+  (interactive)
+  (todo-basic-edit-item-header 'today))
+
+(defun todo-edit-item-date-day-name ()
+  "Replace item's date with the name of a day of the week."
+  (interactive)
+  (todo-basic-edit-item-header 'dayname))
+
+(defun todo-edit-item-date-year (&optional inc)
+  "Interactively edit the year of item's date string.
+With prefix argument INC a positive or negative integer,
+increment or decrement the year by INC."
+  (interactive "p")
+  (todo-basic-edit-item-header 'year inc))
+
+(defun todo-edit-item-date-month (&optional inc)
+  "Interactively edit the month of item's date string.
+With prefix argument INC a positive or negative integer,
+increment or decrement the month by INC."
+  (interactive "p")
+  (todo-basic-edit-item-header 'month inc))
+
+(defun todo-edit-item-date-day (&optional inc)
+  "Interactively edit the day of the month of item's date string.
+With prefix argument INC a positive or negative integer,
+increment or decrement the day by INC."
+  (interactive "p")
+  (todo-basic-edit-item-header 'day inc))
+
+(defun todo-edit-item-diary-inclusion ()
+  "Change diary status of one or more todo items in this category.
+That is, insert `todo-nondiary-marker' if the candidate items
+lack this marking; otherwise, remove it.
+
+If there are marked todo items, change the diary status of all
+and only these, otherwise change the diary status of the item at
+point."
+  (interactive)
+  (let ((buffer-read-only)
+       (marked (assoc (todo-current-category)
+                      todo-categories-with-marks)))
+    (catch 'stop
+      (save-excursion
+       (when marked (goto-char (point-min)))
+       (while (not (eobp))
+         (if (todo-done-item-p)
+             (throw 'stop (message "Done items cannot be edited"))
+           (unless (and marked (not (todo-marked-item-p)))
+             (let* ((beg (todo-item-start))
+                    (lim (save-excursion (todo-item-end)))
+                    (end (save-excursion
+                           (or (todo-time-string-matcher lim)
+                               (todo-date-string-matcher lim)))))
+               (if (looking-at (regexp-quote todo-nondiary-start))
+                   (progn
+                     (replace-match "")
+                     (search-forward todo-nondiary-end (1+ end) t)
+                     (replace-match "")
+                     (todo-update-count 'diary 1))
+                 (when end
+                   (insert todo-nondiary-start)
+                   (goto-char (1+ end))
+                   (insert todo-nondiary-end)
+                   (todo-update-count 'diary -1)))))
+           (unless marked (throw 'stop nil))
+           (todo-forward-item)))))
+    (todo-update-categories-sexp)))
+
+(defun todo-edit-category-diary-inclusion (arg)
+  "Make all items in this category diary items.
+With prefix ARG, make all items in this category non-diary
+items."
+  (interactive "P")
+  (save-excursion
+    (goto-char (point-min))
+    (let ((todo-count (todo-get-count 'todo))
+         (diary-count (todo-get-count 'diary))
+         (buffer-read-only))
+      (catch 'stop
+       (while (not (eobp))
+         (if (todo-done-item-p)        ; We've gone too far.
+             (throw 'stop nil)
+           (let* ((beg (todo-item-start))
+                  (lim (save-excursion (todo-item-end)))
+                  (end (save-excursion
+                         (or (todo-time-string-matcher lim)
+                             (todo-date-string-matcher lim)))))
+             (if arg
+                 (unless (looking-at (regexp-quote todo-nondiary-start))
+                   (insert todo-nondiary-start)
+                   (goto-char (1+ end))
+                   (insert todo-nondiary-end))
+               (when (looking-at (regexp-quote todo-nondiary-start))
+                 (replace-match "")
+                 (search-forward todo-nondiary-end (1+ end) t)
+                 (replace-match "")))))
+         (todo-forward-item))
+       (unless (if arg (zerop diary-count) (= diary-count todo-count))
+         (todo-update-count 'diary (if arg
+                                     (- diary-count)
+                                   (- todo-count diary-count))))
+       (todo-update-categories-sexp)))))
+
+(defun todo-edit-item-diary-nonmarking ()
+  "Change non-marking of one or more diary items in this category.
+That is, insert `diary-nonmarking-symbol' if the candidate items
+lack this marking; otherwise, remove it.
+
+If there are marked todo items, change the non-marking status of
+all and only these, otherwise change the non-marking status of
+the item at point."
+  (interactive)
+  (let ((buffer-read-only)
+       (marked (assoc (todo-current-category)
+                      todo-categories-with-marks)))
+    (catch 'stop
+      (save-excursion
+       (when marked (goto-char (point-min)))
+       (while (not (eobp))
+         (if (todo-done-item-p)
+             (throw 'stop (message "Done items cannot be edited"))
+           (unless (and marked (not (todo-marked-item-p)))
+             (todo-item-start)
+             (unless (looking-at (regexp-quote todo-nondiary-start))
+               (if (looking-at (regexp-quote diary-nonmarking-symbol))
+                   (replace-match "")
+                 (insert diary-nonmarking-symbol))))
+           (unless marked (throw 'stop nil))
+           (todo-forward-item)))))))
+
+(defun todo-edit-category-diary-nonmarking (arg)
+  "Add `diary-nonmarking-symbol' to all diary items in this category.
+With prefix ARG, remove `diary-nonmarking-symbol' from all diary
+items in this category."
+  (interactive "P")
+  (save-excursion
+    (goto-char (point-min))
+    (let (buffer-read-only)
+      (catch 'stop
+      (while (not (eobp))
+       (if (todo-done-item-p)          ; We've gone too far.
+           (throw 'stop nil)
+         (unless (looking-at (regexp-quote todo-nondiary-start))
+           (if arg
+               (when (looking-at (regexp-quote diary-nonmarking-symbol))
+                 (replace-match ""))
+             (unless (looking-at (regexp-quote diary-nonmarking-symbol))
+               (insert diary-nonmarking-symbol))))
+       (todo-forward-item)))))))
+
+(defun todo-set-item-priority (&optional item cat new arg)
+  "Prompt for and set ITEM's priority in CATegory.
+
+Interactively, ITEM is the todo item at point, CAT is the current
+category, and the priority is a number between 1 and the number
+of items in the category.  Non-interactively, non-nil NEW means
+ITEM is a new item and the lowest priority is one more than the
+number of items in CAT.
+
+The new priority is set either interactively by prompt or by a
+numerical prefix argument, or noninteractively by argument ARG,
+whose value can be either of the symbols `raise' or `lower',
+meaning to raise or lower the item's priority by one."
+  (interactive)
+  (unless (and (called-interactively-p 'any)
+              (or (todo-done-item-p) (looking-at "^$")))
+    (let* ((item (or item (todo-item-string)))
+          (marked (todo-marked-item-p))
+          (cat (or cat (cond ((eq major-mode 'todo-mode)
+                              (todo-current-category))
+                             ((eq major-mode 'todo-filtered-items-mode)
+                              (let* ((regexp1
+                                      (concat todo-date-string-start
+                                              todo-date-pattern
+                                              "\\( " diary-time-regexp "\\)?"
+                                              (regexp-quote todo-nondiary-end)
+                                              "?\\(?1: 
\\[\\(.+:\\)?.+\\]\\)")))
+                                (save-excursion
+                                  (re-search-forward regexp1 nil t)
+                                  (match-string-no-properties 1)))))))
+          curnum
+          (todo (cond ((or (eq arg 'raise) (eq arg 'lower)
+                           (eq major-mode 'todo-filtered-items-mode))
+                       (save-excursion
+                         (let ((curstart (todo-item-start))
+                               (count 0))
+                           (goto-char (point-min))
+                           (while (looking-at todo-item-start)
+                             (setq count (1+ count))
+                             (when (= (point) curstart) (setq curnum count))
+                             (todo-forward-item))
+                           count)))
+                      ((eq major-mode 'todo-mode)
+                       (todo-get-count 'todo cat))))
+          (maxnum (if new (1+ todo) todo))
+          (prompt (format "Set item priority (1-%d): " maxnum))
+          (priority (cond ((and (not arg) (numberp current-prefix-arg))
+                           current-prefix-arg)
+                          ((and (eq arg 'raise) (>= curnum 1))
+                           (1- curnum))
+                          ((and (eq arg 'lower) (<= curnum maxnum))
+                           (1+ curnum))))
+          candidate
+          buffer-read-only)
+      (unless (and priority
+                  (or (and (eq arg 'raise) (zerop priority))
+                      (and (eq arg 'lower) (> priority maxnum))))
+       ;; When moving item to another category, show the category before
+       ;; prompting for its priority.
+       (unless (or arg (called-interactively-p 'any))
+         (todo-category-number cat)
+         ;; If done items in category are visible, keep them visible.
+         (let ((done todo-show-with-done))
+           (when (> (buffer-size) (- (point-max) (point-min)))
+             (save-excursion
+               (goto-char (point-min))
+               (setq done (re-search-forward todo-done-string-start nil t))))
+           (let ((todo-show-with-done done))
+             (todo-category-select)
+             ;; Keep top of category in view while setting priority.
+             (goto-char (point-min)))))
+       ;; Prompt for priority only when the category has at least one
+       ;; todo item.
+       (when (> maxnum 1)
+         (while (not priority)
+           (setq candidate (read-number prompt))
+           (setq prompt (when (or (< candidate 1) (> candidate maxnum))
+                          (format "Priority must be an integer between 1 and 
%d.\n"
+                                  maxnum)))
+           (unless prompt (setq priority candidate))))
+       ;; In Top Priorities buffer, an item's priority can be changed
+       ;; wrt items in another category, but not wrt items in the same
+       ;; category.
+       (when (eq major-mode 'todo-filtered-items-mode)
+         (let* ((regexp2 (concat todo-date-string-start todo-date-pattern
+                                 "\\( " diary-time-regexp "\\)?"
+                                 (regexp-quote todo-nondiary-end)
+                                 "?\\(?1:" (regexp-quote cat) "\\)"))
+                (end (cond ((< curnum priority)
+                            (save-excursion (todo-item-end)))
+                           ((> curnum priority)
+                            (save-excursion (todo-item-start)))))
+                (match (save-excursion
+                         (cond ((< curnum priority)
+                                (todo-forward-item (1+ (- priority curnum)))
+                                (when (re-search-backward regexp2 end t)
+                                  (match-string-no-properties 1)))
+                               ((> curnum priority)
+                                (todo-backward-item (- curnum priority))
+                                (when (re-search-forward regexp2 end t)
+                                  (match-string-no-properties 1)))))))
+           (when match
+             (user-error (concat "Cannot reprioritize items from the same "
+                            "category in this mode, only in Todo mode")))))
+       ;; Interactively or with non-nil ARG, relocate the item within its
+       ;; category.
+       (when (or arg (called-interactively-p 'any))
+         (todo-remove-item))
+       (goto-char (point-min))
+       (when priority
+         (unless (= priority 1)
+           (todo-forward-item (1- priority))
+           ;; When called from todo-item-undone and the highest priority
+           ;; is chosen, this advances point to the first done item, so
+           ;; move it up to the empty line above the done items
+           ;; separator.
+           (when (looking-back (concat "^"
+                                       (regexp-quote todo-category-done)
+                                       "\n"))
+             (todo-backward-item))))
+       (todo-insert-with-overlays item)
+       ;; If item was marked, restore the mark.
+       (and marked
+            (let* ((ov (todo-get-overlay 'prefix))
+                   (pref (overlay-get ov 'before-string)))
+              (overlay-put ov 'before-string
+                           (concat todo-item-mark pref))))))))
+
+(defun todo-raise-item-priority ()
+  "Raise priority of current item by moving it up by one item."
+  (interactive)
+  (todo-set-item-priority nil nil nil 'raise))
+
+(defun todo-lower-item-priority ()
+  "Lower priority of current item by moving it down by one item."
+  (interactive)
+  (todo-set-item-priority nil nil nil 'lower))
+
+(defun todo-move-item (&optional file)
+  "Move at least one todo or done item to another category.
+If there are marked items, move all of these; otherwise, move
+the item at point.
+
+With prefix argument FILE, prompt for a specific todo file and
+choose (with TAB completion) a category in it to move the item or
+items to; otherwise, choose and move to any category in either
+the current todo file or one of the files in
+`todo-category-completions-files'.  If the chosen category is
+not an existing categories, then it is created and the item(s)
+become(s) the first entry/entries in that category.
+
+With moved todo items, prompt to set the priority in the category
+moved to (with multiple todo items, the one that had the highest
+priority in the category moved from gets the new priority and the
+rest of the moved todo items are inserted in sequence below it).
+Moved done items are appended to the top of the done items
+section in the category moved to."
+  (interactive "P")
+  (let* ((cat1 (todo-current-category))
+        (marked (assoc cat1 todo-categories-with-marks)))
+    ;; Noop if point is not on an item and there are no marked items.
+    (unless (and (looking-at "^$")
+                (not marked))
+      (let* ((buffer-read-only)
+            (file1 todo-current-todo-file)
+            (num todo-category-number)
+            (item (todo-item-string))
+            (diary-item (todo-diary-item-p))
+            (done-item (and (todo-done-item-p) (concat item "\n")))
+            (omark (save-excursion (todo-item-start) (point-marker)))
+            (todo 0)
+            (diary 0)
+            (done 0)
+            ov cat2 file2 moved nmark todo-items done-items)
+       (unwind-protect
+           (progn
+             (unless marked
+               (setq ov (make-overlay (save-excursion (todo-item-start))
+                                      (save-excursion (todo-item-end))))
+               (overlay-put ov 'face 'todo-search))
+             (let* ((pl (if (and marked (> (cdr marked) 1)) "s" ""))
+                    (cat+file (todo-read-category (concat "Move item" pl
+                                                           " to category: ")
+                                                   nil file)))
+               (while (and (equal (car cat+file) cat1)
+                           (equal (cdr cat+file) file1))
+                 (setq cat+file (todo-read-category
+                                 "Choose a different category: ")))
+               (setq cat2 (car cat+file)
+                     file2 (cdr cat+file))))
+         (if ov (delete-overlay ov)))
+       (set-buffer (find-buffer-visiting file1))
+       (if marked
+           (progn
+             (goto-char (point-min))
+             (while (not (eobp))
+               (when (todo-marked-item-p)
+                 (if (todo-done-item-p)
+                     (setq done-items (concat done-items
+                                              (todo-item-string) "\n")
+                           done (1+ done))
+                   (setq todo-items (concat todo-items
+                                            (todo-item-string) "\n")
+                         todo (1+ todo))
+                   (when (todo-diary-item-p)
+                     (setq diary (1+ diary)))))
+               (todo-forward-item))
+             ;; Chop off last newline of multiple todo item string,
+             ;; since it will be reinserted when setting priority
+             ;; (but with done items priority is not set, so keep
+             ;; last newline).
+             (and todo-items
+                  (setq todo-items (substring todo-items 0 -1))))
+         (if (todo-done-item-p)
+             (setq done 1)
+           (setq todo 1)
+           (when (todo-diary-item-p) (setq diary 1))))
+       (set-window-buffer (selected-window)
+                          (set-buffer (find-file-noselect file2 'nowarn)))
+       (unwind-protect
+           (progn
+             (when (or todo-items (and item (not done-item)))
+               (todo-set-item-priority (or todo-items item) cat2 t))
+             ;; Move done items en bloc to top of done items section.
+             (when (or done-items done-item)
+               (todo-category-number cat2)
+               (widen)
+               (goto-char (point-min))
+               (re-search-forward
+                (concat "^" (regexp-quote (concat todo-category-beg cat2))
+                        "$") nil t)
+               (re-search-forward
+                (concat "^" (regexp-quote todo-category-done)) nil t)
+               (forward-line)
+               (insert (or done-items done-item)))
+             (setq moved t))
+         (cond
+          ;; Move succeeded, so remove item from starting category,
+          ;; update item counts and display the category containing
+          ;; the moved item.
+          (moved
+           (setq nmark (point-marker))
+           (when todo (todo-update-count 'todo todo))
+           (when diary (todo-update-count 'diary diary))
+           (when done (todo-update-count 'done done))
+           (todo-update-categories-sexp)
+           (with-current-buffer (find-buffer-visiting file1)
+             (save-excursion
+               (save-restriction
+                 (widen)
+                 (goto-char omark)
+                 (if marked
+                     (let (beg end)
+                       (setq item nil)
+                       (re-search-backward
+                        (concat "^" (regexp-quote todo-category-beg)) nil t)
+                       (forward-line)
+                       (setq beg (point))
+                       (setq end (if (re-search-forward
+                                      (concat "^" (regexp-quote
+                                                   todo-category-beg)) nil t)
+                                     (match-beginning 0)
+                                   (point-max)))
+                       (goto-char beg)
+                       (while (< (point) end)
+                         (if (todo-marked-item-p)
+                             (todo-remove-item)
+                           (todo-forward-item)))
+                       (setq todo-categories-with-marks
+                             (assq-delete-all cat1 
todo-categories-with-marks)))
+                   (if ov (delete-overlay ov))
+                   (todo-remove-item))))
+             (when todo (todo-update-count 'todo (- todo) cat1))
+             (when diary (todo-update-count 'diary (- diary) cat1))
+             (when done (todo-update-count 'done (- done) cat1))
+             (todo-update-categories-sexp))
+           (set-window-buffer (selected-window)
+                              (set-buffer (find-file-noselect file2 'nowarn)))
+           (setq todo-category-number (todo-category-number cat2))
+           (let ((todo-show-with-done (or done-items done-item)))
+             (todo-category-select))
+           (goto-char nmark)
+           ;; If item is moved to end of (just first?) category, make
+           ;; sure the items above it are displayed in the window.
+           (recenter))
+          ;; User quit before setting priority of todo item(s), so
+          ;; return to starting category.
+          (t
+           (set-window-buffer (selected-window)
+                              (set-buffer (find-file-noselect file1 'nowarn)))
+           (todo-category-number cat1)
+           (todo-category-select)
+           (goto-char omark))))))))
+
+(defun todo-item-done (&optional arg)
+  "Tag a todo item in this category as done and relocate it.
+
+With prefix argument ARG prompt for a comment and append it to
+the done item; this is only possible if there are no marked
+items.  If there are marked items, tag all of these with
+`todo-done-string' plus the current date and, if
+`todo-always-add-time-string' is non-nil, the current time;
+otherwise, just tag the item at point.  Items tagged as done are
+relocated to the category's (by default hidden) done section.  If
+done items are visible on invoking this command, they remain
+visible."
+  (interactive "P")
+  (let* ((cat (todo-current-category))
+        (marked (assoc cat todo-categories-with-marks)))
+    (when marked
+      (save-excursion
+       (save-restriction
+         (goto-char (point-max))
+         (todo-backward-item)
+         (unless (todo-done-item-p)
+           (widen)
+           (unless (re-search-forward
+                    (concat "^" (regexp-quote todo-category-beg)) nil t)
+             (goto-char (point-max)))
+           (forward-line -1))
+         (while (todo-done-item-p)
+           (when (todo-marked-item-p)
+             (user-error "This command does not apply to done items"))
+           (todo-backward-item)))))
+    (unless (and (not marked)
+                (or (todo-done-item-p)
+                    ;; Point is between todo and done items.
+                    (looking-at "^$")))
+      (let* ((date-string (calendar-date-string (calendar-current-date) t t))
+            (time-string (if todo-always-add-time-string
+                             (concat " " (substring (current-time-string)
+                                                    11 16))
+                           ""))
+            (done-prefix (concat "[" todo-done-string date-string time-string
+                                 "] "))
+            (comment (and arg (read-string "Enter a comment: ")))
+            (item-count 0)
+            (diary-count 0)
+            (show-done (save-excursion
+                         (goto-char (point-min))
+                         (re-search-forward todo-done-string-start nil t)))
+            (buffer-read-only nil)
+            item done-item opoint)
+       ;; Don't add empty comment to done item.
+       (setq comment (unless (zerop (length comment))
+                       (concat " [" todo-comment-string ": " comment "]")))
+       (and marked (goto-char (point-min)))
+       (catch 'done
+         ;; Stop looping when we hit the empty line below the last
+         ;; todo item (this is eobp if only done items are hidden).
+         (while (not (looking-at "^$"))
+           (if (or (not marked) (and marked (todo-marked-item-p)))
+               (progn
+                 (setq item (todo-item-string))
+                 (setq done-item (concat done-item done-prefix item
+                                         comment (and marked "\n")))
+                 (setq item-count (1+ item-count))
+                 (when (todo-diary-item-p)
+                   (setq diary-count (1+ diary-count)))
+                 (todo-remove-item)
+                 (unless marked (throw 'done nil)))
+             (todo-forward-item))))
+       (when marked
+         ;; Chop off last newline of done item string.
+         (setq done-item (substring done-item 0 -1))
+         (setq todo-categories-with-marks
+               (assq-delete-all cat todo-categories-with-marks)))
+       (save-excursion
+         (widen)
+         (re-search-forward
+          (concat "^" (regexp-quote todo-category-done)) nil t)
+         (forward-char)
+         (when show-done (setq opoint (point)))
+         (insert done-item "\n"))
+       (todo-update-count 'todo (- item-count))
+       (todo-update-count 'done item-count)
+       (todo-update-count 'diary (- diary-count))
+       (todo-update-categories-sexp)
+       (let ((todo-show-with-done show-done))
+         (todo-category-select)
+         ;; When done items are shown, put cursor on first just done item.
+         (when opoint (goto-char opoint)))))))
+
+(defun todo-edit-done-item-comment (&optional arg)
+  "Add a comment to this done item or edit an existing comment.
+With prefix ARG delete an existing comment."
+  (interactive "P")
+  (when (todo-done-item-p)
+    (let ((item (todo-item-string))
+         (opoint (point))
+         (end (save-excursion (todo-item-end)))
+         comment buffer-read-only)
+      (save-excursion
+       (todo-item-start)
+       (if (re-search-forward (concat " \\["
+                                      (regexp-quote todo-comment-string)
+                                      ": \\([^]]+\\)\\]") end t)
+           (if arg
+               (when (todo-y-or-n-p "Delete comment? ")
+                 (delete-region (match-beginning 0) (match-end 0)))
+             (setq comment (read-string "Edit comment: "
+                                        (cons (match-string 1) 1)))
+             (replace-match comment nil nil nil 1))
+         (setq comment (read-string "Enter a comment: "))
+         ;; If user moved point during editing, make sure it moves back.
+         (goto-char opoint)
+         (todo-item-end)
+         (insert " [" todo-comment-string ": " comment "]"))))))
+
+(defun todo-item-undone ()
+  "Restore at least one done item to this category's todo section.
+Prompt for the new priority.  If there are marked items, undo all
+of these, giving the first undone item the new priority and the
+rest following directly in sequence; otherwise, undo just the
+item at point.
+
+If the done item has a comment, ask whether to omit the comment
+from the restored item.  With multiple marked done items with
+comments, only ask once, and if affirmed, omit subsequent
+comments without asking."
+  (interactive)
+  (let* ((cat (todo-current-category))
+        (marked (assoc cat todo-categories-with-marks))
+        (pl (if (and marked (> (cdr marked) 1)) "s" "")))
+    (when (or marked (todo-done-item-p))
+      (let ((buffer-read-only)
+           (opoint (point))
+           (omark (point-marker))
+           (first 'first)
+           (item-count 0)
+           (diary-count 0)
+           start end item ov npoint undone)
+       (and marked (goto-char (point-min)))
+       (catch 'done
+         (while (not (eobp))
+           (when (or (not marked) (and marked (todo-marked-item-p)))
+             (if (not (todo-done-item-p))
+                 (user-error "Only done items can be undone")
+               (todo-item-start)
+               (unless marked
+                 (setq ov (make-overlay (save-excursion (todo-item-start))
+                                        (save-excursion (todo-item-end))))
+                 (overlay-put ov 'face 'todo-search))
+               ;; Find the end of the date string added upon tagging item as
+               ;; done.
+               (setq start (search-forward "] "))
+               (setq item-count (1+ item-count))
+               (unless (looking-at (regexp-quote todo-nondiary-start))
+                 (setq diary-count (1+ diary-count)))
+               (setq end (save-excursion (todo-item-end)))
+               ;; Ask (once) whether to omit done item's comment.  If
+               ;; affirmed, omit subsequent comments without asking.
+               (when (re-search-forward
+                      (concat " \\[" (regexp-quote todo-comment-string)
+                              ": [^]]+\\]") end t)
+                 (unwind-protect
+                     (if (eq first 'first)
+                         (setq first
+                               (if (eq todo-undo-item-omit-comment 'ask)
+                                   (when (todo-y-or-n-p
+                                          (concat "Omit comment" pl
+                                                  " from restored item"
+                                                  pl "? "))
+                                     'omit)
+                                 (when todo-undo-item-omit-comment 'omit)))
+                       t)
+                   (when (and (eq first 'first) ov) (delete-overlay ov)))
+                 (when (eq first 'omit)
+                   (setq end (match-beginning 0))))
+               (setq item (concat item
+                                  (buffer-substring-no-properties start end)
+                                  (when marked "\n")))
+               (unless marked (throw 'done nil))))
+           (todo-forward-item)))
+       (unwind-protect
+           (progn
+             ;; Chop off last newline of multiple items string, since
+             ;; it will be reinserted on setting priority.
+             (and marked (setq item (substring item 0 -1)))
+             (todo-set-item-priority item cat t)
+             (setq npoint (point))
+             (setq undone t))
+         (when ov (delete-overlay ov))
+         (if (not undone)
+             (goto-char opoint)
+           (if marked
+               (progn
+                 (setq item nil)
+                 (re-search-forward
+                  (concat "^" (regexp-quote todo-category-done)) nil t)
+                 (while (not (eobp))
+                   (if (todo-marked-item-p)
+                       (todo-remove-item)
+                     (todo-forward-item)))
+                 (setq todo-categories-with-marks
+                       (assq-delete-all cat todo-categories-with-marks)))
+             (goto-char omark)
+             (todo-remove-item))
+           (todo-update-count 'todo item-count)
+           (todo-update-count 'done (- item-count))
+           (when diary-count (todo-update-count 'diary diary-count))
+           (todo-update-categories-sexp)
+           (let ((todo-show-with-done (> (todo-get-count 'done) 0)))
+             (todo-category-select))
+           ;; Put cursor on undone item.
+           (goto-char npoint)))
+       (set-marker omark nil)))))
+
+;; 
-----------------------------------------------------------------------------
+;;; Done item archives
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-find-archive (&optional ask)
+  "Visit the archive of the current todo category, if it exists.
+If the category has no archived items, prompt to visit the
+archive anyway.  If there is no archive for this file or with
+non-nil argument ASK, prompt to visit another archive.
+
+The buffer showing the archive is in Todo Archive mode.  The
+first visit in a session displays the first category in the
+archive, subsequent visits return to the last category
+displayed."
+  (interactive)
+  (let* ((cat (todo-current-category))
+        (count (todo-get-count 'archived cat))
+        (archive (concat (file-name-sans-extension todo-current-todo-file)
+                         ".toda"))
+        place)
+    (setq place (cond (ask 'other-archive)
+                     ((file-exists-p archive) 'this-archive)
+                     (t (when (todo-y-or-n-p
+                               (concat "This file has no archive; "
+                                       "visit another archive? "))
+                          'other-archive))))
+    (when (eq place 'other-archive)
+      (setq archive (todo-read-file-name "Choose a todo archive: " t t)))
+    (when (and (eq place 'this-archive) (zerop count))
+      (setq place (when (todo-y-or-n-p
+                         (concat "This category has no archived items;"
+                                 " visit archive anyway? "))
+                    'other-cat)))
+    (when place
+      (set-window-buffer (selected-window)
+                        (set-buffer (find-file-noselect archive)))
+      (if (member place '(other-archive other-cat))
+         (setq todo-category-number 1)
+       (todo-category-number cat))
+      (todo-category-select))))
+
+(defun todo-choose-archive ()
+  "Choose an archive and visit it."
+  (interactive)
+  (todo-find-archive t))
+
+(defun todo-archive-done-item (&optional all)
+  "Archive at least one done item in this category.
+
+With prefix argument ALL, prompt whether to archive all done
+items in this category and on confirmation archive them.
+Otherwise, if there are marked done items (and no marked todo
+items), archive all of these; otherwise, archive the done item at
+point.
+
+If the archive of this file does not exist, it is created.  If
+this category does not exist in the archive, it is created."
+  (interactive "P")
+  (when (eq major-mode 'todo-mode)
+    (if (and all (zerop (todo-get-count 'done)))
+       (message "No done items in this category")
+      (catch 'end
+       (let* ((cat (todo-current-category))
+              (tbuf (current-buffer))
+              (marked (assoc cat todo-categories-with-marks))
+              (afile (concat (file-name-sans-extension
+                              todo-current-todo-file) ".toda"))
+              (archive (if (file-exists-p afile)
+                           (find-file-noselect afile t)
+                         (get-buffer-create afile)))
+              (item (and (todo-done-item-p)
+                         (concat (todo-item-string) "\n")))
+              (count 0)
+              (opoint (unless (todo-done-item-p) (point)))
+              marked-items beg end all-done
+              buffer-read-only)
+         (cond
+          (all
+           (if (todo-y-or-n-p "Archive all done items in this category? ")
+               (save-excursion
+                 (save-restriction
+                   (goto-char (point-min))
+                   (widen)
+                   (setq beg (progn
+                               (re-search-forward todo-done-string-start
+                                                  nil t)
+                               (match-beginning 0))
+                         end (if (re-search-forward
+                                  (concat "^"
+                                          (regexp-quote todo-category-beg))
+                                  nil t)
+                                 (match-beginning 0)
+                               (point-max))
+                         all-done (buffer-substring-no-properties beg end)
+                         count (todo-get-count 'done))
+                   ;; Restore starting point, unless it was on a done
+                   ;; item, since they will all be deleted.
+                   (when opoint (goto-char opoint))))
+             (throw 'end nil)))
+          (marked
+           (save-excursion
+             (goto-char (point-min))
+             (while (not (eobp))
+               (when (todo-marked-item-p)
+                 (if (not (todo-done-item-p))
+                     (throw 'end (message "Only done items can be archived"))
+                   (setq marked-items
+                         (concat marked-items (todo-item-string) "\n"))
+                   (setq count (1+ count))))
+               (todo-forward-item)))))
+         (if (not (or marked all item))
+             (throw 'end (message "Only done items can be archived"))
+           (with-current-buffer archive
+             (unless buffer-file-name (erase-buffer))
+             (let (buffer-read-only)
+               (widen)
+               (goto-char (point-min))
+               (if (and (re-search-forward
+                         (concat "^" (regexp-quote
+                                      (concat todo-category-beg cat)) "$")
+                         nil t)
+                        (re-search-forward (regexp-quote todo-category-done)
+                                           nil t))
+                   ;; Start of done items section in existing category.
+                   (forward-char)
+                 (todo-add-category nil cat)
+                 ;; Start of done items section in new category.
+                 (goto-char (point-max)))
+               (insert (cond (marked marked-items)
+                             (all all-done)
+                             (item)))
+               (todo-update-count 'done (if (or marked all) count 1) cat)
+               (todo-update-categories-sexp)
+               ;; If archive is new, save to file now (using write-region in
+               ;; order not to get prompted for file to save to), to let
+               ;; auto-mode-alist take effect below.
+               (unless buffer-file-name
+                 (write-region nil nil afile)
+                 (kill-buffer))))
+           (with-current-buffer tbuf
+             (cond
+              (all
+               (save-excursion
+                 (save-restriction
+                   ;; Make sure done items are accessible.
+                   (widen)
+                   (remove-overlays beg end)
+                   (delete-region beg end)
+                   (todo-update-count 'done (- count))
+                   (todo-update-count 'archived count))))
+              ((or marked
+                   ;; If we're archiving all done items, can't
+                   ;; first archive item point was on, since
+                   ;; that will short-circuit the rest.
+                   (and item (not all)))
+               (and marked (goto-char (point-min)))
+               (catch 'done
+                 (while (not (eobp))
+                   (if (or (and marked (todo-marked-item-p)) item)
+                       (progn
+                         (todo-remove-item)
+                         (todo-update-count 'done -1)
+                         (todo-update-count 'archived 1)
+                         ;; Don't leave point below last item.
+                         (and item (bolp) (eolp) (< (point-min) (point-max))
+                              (todo-backward-item))
+                         (when item
+                           (throw 'done (setq item nil))))
+                     (todo-forward-item))))))
+             (when marked
+               (setq todo-categories-with-marks
+                     (assq-delete-all cat todo-categories-with-marks)))
+             (todo-update-categories-sexp)
+             (todo-prefix-overlays)))
+         (find-file afile)
+         (todo-category-number cat)
+         (todo-category-select)
+         (split-window-below)
+         (set-window-buffer (selected-window) tbuf)
+         ;; Make todo file current to select category.
+         (find-file (buffer-file-name tbuf))
+         ;; Make sure done item separator is hidden (if done items
+         ;; were initially visible).
+         (let (todo-show-with-done) (todo-category-select)))))))
+
+(defun todo-unarchive-items ()
+  "Unarchive at least one item in this archive category.
+If there are marked items, unarchive all of these; otherwise,
+unarchive the item at point.
+
+Unarchived items are restored as done items to the corresponding
+category in the todo file, inserted at the top of done items
+section.  If all items in the archive category have been
+restored, the category is deleted from the archive.  If this was
+the only category in the archive, the archive file is deleted."
+  (interactive)
+  (when (eq major-mode 'todo-archive-mode)
+    (let* ((cat (todo-current-category))
+          (tbuf (find-file-noselect
+                 (concat (file-name-sans-extension todo-current-todo-file)
+                         ".todo") t))
+          (marked (assoc cat todo-categories-with-marks))
+          (item (concat (todo-item-string) "\n"))
+          (marked-count 0)
+          marked-items
+          buffer-read-only)
+      (when marked
+       (save-excursion
+         (goto-char (point-min))
+         (while (not (eobp))
+           (when (todo-marked-item-p)
+             (setq marked-items (concat marked-items (todo-item-string) "\n"))
+             (setq marked-count (1+ marked-count)))
+           (todo-forward-item))))
+      ;; Restore items to top of category's done section and update counts.
+      (with-current-buffer tbuf
+       (let (buffer-read-only newcat)
+         (widen)
+         (goto-char (point-min))
+         ;; Find the corresponding todo category, or if there isn't
+         ;; one, add it.
+         (unless (re-search-forward
+                  (concat "^" (regexp-quote (concat todo-category-beg cat))
+                          "$") nil t)
+           (todo-add-category nil cat)
+           (setq newcat t))
+         ;; Go to top of category's done section.
+         (re-search-forward
+          (concat "^" (regexp-quote todo-category-done)) nil t)
+         (forward-line)
+         (cond (marked
+                (insert marked-items)
+                (todo-update-count 'done marked-count cat)
+                (unless newcat         ; Newly added category has no archive.
+                  (todo-update-count 'archived (- marked-count) cat)))
+               (t
+                (insert item)
+                (todo-update-count 'done 1 cat)
+                (unless newcat         ; Newly added category has no archive.
+                  (todo-update-count 'archived -1 cat))))
+         (todo-update-categories-sexp)))
+      ;; Delete restored items from archive.
+      (when marked
+       (setq item nil)
+       (goto-char (point-min)))
+      (catch 'done
+       (while (not (eobp))
+         (if (or (todo-marked-item-p) item)
+             (progn
+               (todo-remove-item)
+               (when item
+                 (throw 'done (setq item nil))))
+           (todo-forward-item))))
+      (todo-update-count 'done (if marked (- marked-count) -1) cat)
+      ;; If that was the last category in the archive, delete the whole file.
+      (if (= (length todo-categories) 1)
+         (progn
+           (delete-file todo-current-todo-file)
+           ;; Kill the archive buffer silently.
+           (set-buffer-modified-p nil)
+           (kill-buffer))
+       ;; Otherwise, if the archive category is now empty, delete it.
+       (when (eq (point-min) (point-max))
+         (widen)
+         (let ((beg (re-search-backward
+                     (concat "^" (regexp-quote todo-category-beg) cat "$")
+                     nil t))
+               (end (if (re-search-forward
+                         (concat "^" (regexp-quote todo-category-beg))
+                         nil t 2)
+                        (match-beginning 0)
+                      (point-max))))
+           (remove-overlays beg end)
+           (delete-region beg end)
+           (setq todo-categories (delete (assoc cat todo-categories)
+                                          todo-categories))
+           (todo-update-categories-sexp))))
+      ;; Visit category in todo file and show restored done items.
+      (let ((tfile (buffer-file-name tbuf))
+           (todo-show-with-done t))
+       (set-window-buffer (selected-window)
+                          (set-buffer (find-file-noselect tfile)))
+       (todo-category-number cat)
+       (todo-category-select)
+       (message "Items unarchived.")))))
+
+(defun todo-jump-to-archive-category (&optional file)
+  "Prompt for a category in a todo archive and jump to it.
+With prefix argument FILE, prompt for an archive and choose (with
+TAB completion) a category in it to jump to; otherwise, choose
+and jump to any category in the current archive."
+  (interactive "P")
+  (todo-jump-to-category file 'archive))
+
+;; 
-----------------------------------------------------------------------------
+;;; Displaying and sorting tables of categories
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-categories-category-label "Category"
+  "Category button label in Todo Categories mode."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-todo-label "Todo"
+  "Todo button label in Todo Categories mode."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-diary-label "Diary"
+  "Diary button label in Todo Categories mode."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-done-label "Done"
+  "Done button label in Todo Categories mode."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-archived-label "Archived"
+  "Archived button label in Todo Categories mode."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-totals-label "Totals"
+  "String to label total item counts in Todo Categories mode."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-number-separator " | "
+  "String between number and category in Todo Categories mode.
+This separates the number from the category name in the default
+categories display according to priority."
+  :type 'string
+  :group 'todo-categories)
+
+(defcustom todo-categories-align 'center
+  "Alignment of category names in Todo Categories mode."
+  :type '(radio (const left) (const center) (const right))
+  :group 'todo-categories)
+
+(defun todo-show-categories-table ()
+  "Display a table of the current file's categories and item counts.
+
+In the initial display the categories are numbered, indicating
+their current order for navigating by \\[todo-forward-category]
+and \\[todo-backward-category].  You can persistantly change the
+order of the category at point by typing
+\\[todo-set-category-number], \\[todo-raise-category] or
+\\[todo-lower-category].
+
+The labels above the category names and item counts are buttons,
+and clicking these changes the display: sorted by category name
+or by the respective item counts (alternately descending or
+ascending).  In these displays the categories are not numbered
+and \\[todo-set-category-number], \\[todo-raise-category] and
+\\[todo-lower-category] are disabled.  (Programmatically, the
+sorting is triggered by passing a non-nil SORTKEY argument.)
+
+In addition, the lines with the category names and item counts
+are buttonized, and pressing one of these button jumps to the
+category in Todo mode (or Todo Archive mode, for categories
+containing only archived items, provided user option
+`todo-skip-archived-categories' is non-nil.  These categories
+are shown in `todo-archived-only' face."
+  (interactive)
+  (todo-display-categories)
+  (let (sortkey)
+    (todo-update-categories-display sortkey)))
+
+(defun todo-next-button (n)
+  "Move point to the Nth next button in the table of categories."
+  (interactive "p")
+  (forward-button n 'wrap 'display-message)
+  (and (bolp) (button-at (point))
+       ;; Align with beginning of category label.
+       (forward-char (+ 4 (length todo-categories-number-separator)))))
+
+(defun todo-previous-button (n)
+  "Move point to the Nth previous button in the table of categories."
+  (interactive "p")
+  (backward-button n 'wrap 'display-message)
+  (and (bolp) (button-at (point))
+       ;; Align with beginning of category label.
+       (forward-char (+ 4 (length todo-categories-number-separator)))))
+
+(defun todo-set-category-number (&optional arg)
+  "Change number of category at point in the table of categories.
+
+With ARG nil, prompt for the new number.  Alternatively, the
+enter the new number with numerical prefix ARG.  Otherwise, if
+ARG is either of the symbols `raise' or `lower', raise or lower
+the category line in the table by one, respectively, thereby
+decreasing or increasing its number."
+  (interactive "P")
+  (let ((curnum (save-excursion
+                 ;; Get the number representing the priority of the category
+                 ;; on the current line.
+                 (forward-line 0) (skip-chars-forward " ") (number-at-point))))
+    (when curnum               ; Do nothing if we're not on a category line.
+      (let* ((maxnum (length todo-categories))
+            (prompt (format "Set category priority (1-%d): " maxnum))
+            (col (current-column))
+            (buffer-read-only nil)
+            (priority (cond ((and (eq arg 'raise) (> curnum 1))
+                             (1- curnum))
+                            ((and (eq arg 'lower) (< curnum maxnum))
+                             (1+ curnum))))
+            candidate)
+       (while (not priority)
+         (setq candidate (or arg (read-number prompt)))
+         (setq arg nil)
+         (setq prompt
+               (cond ((or (< candidate 1) (> candidate maxnum))
+                      (format "Priority must be an integer between 1 and %d: "
+                              maxnum))
+                     ((= candidate curnum)
+                      "Choose a different priority than the current one: ")))
+         (unless prompt (setq priority candidate)))
+       (let* ((lower (< curnum priority)) ; Priority is being lowered.
+              (head (butlast todo-categories
+                             (apply (if lower 'identity '1+)
+                                    (list (- maxnum priority)))))
+              (tail (nthcdr (apply (if lower 'identity '1-) (list priority))
+                            todo-categories))
+              ;; Category's name and items counts list.
+              (catcons (nth (1- curnum) todo-categories))
+              (todo-categories (nconc head (list catcons) tail))
+              newcats)
+         (when lower (setq todo-categories (nreverse todo-categories)))
+         (setq todo-categories (delete-dups todo-categories))
+         (when lower (setq todo-categories (nreverse todo-categories)))
+         (setq newcats todo-categories)
+         (kill-buffer)
+         (with-current-buffer (find-buffer-visiting todo-current-todo-file)
+           (setq todo-categories newcats)
+           (todo-update-categories-sexp))
+         (todo-show-categories-table)
+         (forward-line (1+ priority))
+         (forward-char col))))))
+
+(defun todo-raise-category ()
+  "Raise priority of category at point in the table of categories."
+  (interactive)
+  (todo-set-category-number 'raise))
+
+(defun todo-lower-category ()
+  "Lower priority of category at point in the table of categories."
+  (interactive)
+  (todo-set-category-number 'lower))
+
+(defun todo-sort-categories-alphabetically-or-numerically ()
+  "Sort table of categories alphabetically or numerically."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (forward-line 2)
+    (if (member 'alpha todo-descending-counts)
+       (progn
+         (todo-update-categories-display nil)
+         (setq todo-descending-counts
+               (delete 'alpha todo-descending-counts)))
+      (todo-update-categories-display 'alpha))))
+
+(defun todo-sort-categories-by-todo ()
+  "Sort table of categories by number of todo items."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (forward-line 2)
+    (todo-update-categories-display 'todo)))
+
+(defun todo-sort-categories-by-diary ()
+  "Sort table of categories by number of diary items."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (forward-line 2)
+    (todo-update-categories-display 'diary)))
+
+(defun todo-sort-categories-by-done ()
+  "Sort table of categories by number of non-archived done items."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (forward-line 2)
+    (todo-update-categories-display 'done)))
+
+(defun todo-sort-categories-by-archived ()
+  "Sort table of categories by number of archived items."
+  (interactive)
+  (save-excursion
+    (goto-char (point-min))
+    (forward-line 2)
+    (todo-update-categories-display 'archived)))
+
+(defvar todo-categories-buffer "*Todo Categories*"
+  "Name of buffer in Todo Categories mode.")
+
+(defun todo-longest-category-name-length (categories)
+  "Return the length of the longest name in list CATEGORIES."
+  (let ((longest 0))
+    (dolist (c categories longest)
+      (setq longest (max longest (length c))))))
+
+(defun todo-adjusted-category-label-length ()
+  "Return adjusted length of category label button.
+The adjustment ensures proper tabular alignment in Todo
+Categories mode."
+  (let* ((categories (mapcar 'car todo-categories))
+        (longest (todo-longest-category-name-length categories))
+        (catlablen (length todo-categories-category-label))
+        (lc-diff (- longest catlablen)))
+    (if (and (natnump lc-diff) (cl-oddp lc-diff))
+       (1+ longest)
+      (max longest catlablen))))
+
+(defun todo-padded-string (str)
+  "Return category name or label string STR padded with spaces.
+The placement of the padding is determined by the value of user
+option `todo-categories-align'."
+  (let* ((len (todo-adjusted-category-label-length))
+        (strlen (length str))
+        (strlen-odd (eq (logand strlen 1) 1))
+        (padding (max 0 (/ (- len strlen) 2)))
+        (padding-left (cond ((eq todo-categories-align 'left) 0)
+                            ((eq todo-categories-align 'center) padding)
+                            ((eq todo-categories-align 'right)
+                             (if strlen-odd (1+ (* padding 2)) (* padding 
2)))))
+        (padding-right (cond ((eq todo-categories-align 'left)
+                              (if strlen-odd (1+ (* padding 2)) (* padding 2)))
+                             ((eq todo-categories-align 'center)
+                              (if strlen-odd (1+ padding) padding))
+                             ((eq todo-categories-align 'right) 0))))
+    (concat (make-string padding-left 32) str (make-string padding-right 32))))
+
+(defvar todo-descending-counts nil
+  "List of keys for category counts sorted in descending order.")
+
+(defun todo-sort (list &optional key)
+  "Return a copy of LIST, possibly sorted according to KEY."
+  (let* ((l (copy-sequence list))
+        (fn (if (eq key 'alpha)
+                  (lambda (x) (upcase x)) ; Alphabetize case insensitively.
+                (lambda (x) (todo-get-count key x))))
+        ;; Keep track of whether the last sort by key was descending or
+        ;; ascending.
+        (descending (member key todo-descending-counts))
+        (cmp (if (eq key 'alpha)
+                 'string<
+               (if descending '< '>)))
+        (pred (lambda (s1 s2) (let ((t1 (funcall fn (car s1)))
+                                    (t2 (funcall fn (car s2))))
+                                (funcall cmp t1 t2)))))
+    (when key
+      (setq l (sort l pred))
+      ;; Switch between descending and ascending sort order.
+      (if descending
+         (setq todo-descending-counts
+               (delete key todo-descending-counts))
+       (push key todo-descending-counts)))
+    l))
+
+(defun todo-display-sorted (type)
+  "Keep point on the TYPE count sorting button just clicked."
+  (let ((opoint (point)))
+    (todo-update-categories-display type)
+    (goto-char opoint)))
+
+(defun todo-label-to-key (label)
+  "Return symbol for sort key associated with LABEL."
+  (let (key)
+    (cond ((string= label todo-categories-category-label)
+          (setq key 'alpha))
+         ((string= label todo-categories-todo-label)
+          (setq key 'todo))
+         ((string= label todo-categories-diary-label)
+          (setq key 'diary))
+         ((string= label todo-categories-done-label)
+          (setq key 'done))
+         ((string= label todo-categories-archived-label)
+          (setq key 'archived)))
+    key))
+
+(defun todo-insert-sort-button (label)
+  "Insert button for displaying categories sorted by item counts.
+LABEL determines which type of count is sorted."
+  (let* ((str (if (string= label todo-categories-category-label)
+                 (todo-padded-string label)
+               label))
+        (beg (point))
+        (end (+ beg (length str)))
+        ov)
+    (insert-button str 'face nil
+                  'action
+                  `(lambda (button)
+                     (let ((key (todo-label-to-key ,label)))
+                       (if (and (member key todo-descending-counts)
+                                (eq key 'alpha))
+                           (progn
+                             ;; If display is alphabetical, switch back to
+                             ;; category priority order.
+                             (todo-display-sorted nil)
+                             (setq todo-descending-counts
+                                   (delete key todo-descending-counts)))
+                         (todo-display-sorted key)))))
+    (setq ov (make-overlay beg end))
+    (overlay-put ov 'face 'todo-button)))
+
+(defun todo-total-item-counts ()
+  "Return a list of total item counts for the current file."
+  (mapcar (lambda (i) (apply '+ (mapcar (lambda (l) (aref l i))
+                                       (mapcar 'cdr todo-categories))))
+         (list 0 1 2 3)))
+
+(defvar todo-categories-category-number 0
+  "Variable for numbering categories in Todo Categories mode.")
+
+(defun todo-insert-category-line (cat &optional nonum)
+  "Insert button with category CAT's name and item counts.
+With non-nil argument NONUM show only these; otherwise, insert a
+number in front of the button indicating the category's priority.
+The number and the category name are separated by the string
+which is the value of the user option
+`todo-categories-number-separator'."
+  (let ((archive (member todo-current-todo-file todo-archives))
+       (num todo-categories-category-number)
+       (str (todo-padded-string cat))
+       (opoint (point)))
+    (setq num (1+ num) todo-categories-category-number num)
+    (insert-button
+     (concat (if nonum
+                (make-string (+ 4 (length todo-categories-number-separator))
+                             32)
+              (format " %3d%s" num todo-categories-number-separator))
+            str
+            (mapconcat (lambda (elt)
+                         (concat
+                          (make-string (1+ (/ (length (car elt)) 2)) 32) ; 
label
+                          (format "%3d" (todo-get-count (cdr elt) cat)) ; count
+                          ;; Add an extra space if label length is odd.
+                          (when (cl-oddp (length (car elt))) " ")))
+                       (if archive
+                           (list (cons todo-categories-done-label 'done))
+                         (list (cons todo-categories-todo-label 'todo)
+                               (cons todo-categories-diary-label 'diary)
+                               (cons todo-categories-done-label 'done)
+                               (cons todo-categories-archived-label
+                                     'archived)))
+                         "")
+            " ") ; Make highlighting on last column look better.
+     'face (if (and todo-skip-archived-categories
+                   (zerop (todo-get-count 'todo cat))
+                   (zerop (todo-get-count 'done cat))
+                   (not (zerop (todo-get-count 'archived cat))))
+              'todo-archived-only
+            nil)
+     'action `(lambda (button) (let ((buf (current-buffer)))
+                                (todo-jump-to-category nil ,cat)
+                                (kill-buffer buf))))
+    ;; Highlight the sorted count column.
+    (let* ((beg (+ opoint 7 (length str)))
+          end ovl)
+      (cond ((eq nonum 'todo)
+            (setq beg (+ beg 1 (/ (length todo-categories-todo-label) 2))))
+           ((eq nonum 'diary)
+            (setq beg (+ beg 1 (length todo-categories-todo-label)
+                          2 (/ (length todo-categories-diary-label) 2))))
+           ((eq nonum 'done)
+            (setq beg (+ beg 1 (length todo-categories-todo-label)
+                          2 (length todo-categories-diary-label)
+                          2 (/ (length todo-categories-done-label) 2))))
+           ((eq nonum 'archived)
+            (setq beg (+ beg 1 (length todo-categories-todo-label)
+                          2 (length todo-categories-diary-label)
+                          2 (length todo-categories-done-label)
+                          2 (/ (length todo-categories-archived-label) 2)))))
+      (unless (= beg (+ opoint 7 (length str))) ; Don't highlight categories.
+       (setq end (+ beg 4))
+       (setq ovl (make-overlay beg end))
+       (overlay-put ovl 'face 'todo-sorted-column)))
+    (newline)))
+
+(defun todo-display-categories ()
+  "Prepare buffer for displaying table of categories and item counts."
+  (unless (eq major-mode 'todo-categories-mode)
+    (setq todo-global-current-todo-file
+         (or todo-current-todo-file
+             (todo-absolute-file-name todo-default-todo-file)))
+    (set-window-buffer (selected-window)
+                      (set-buffer (get-buffer-create todo-categories-buffer)))
+    (kill-all-local-variables)
+    (todo-categories-mode)
+    (let ((archive (member todo-current-todo-file todo-archives))
+         buffer-read-only)
+      (erase-buffer)
+      (insert (format (concat "Category counts for todo "
+                             (if archive "archive" "file")
+                             " \"%s\".")
+                     (todo-short-file-name todo-current-todo-file)))
+      (newline 2)
+      ;; Make space for the column of category numbers.
+      (insert (make-string (+ 4 (length todo-categories-number-separator)) 32))
+      ;; Add the category and item count buttons (if this is the list of
+      ;; categories in an archive, show only done item counts).
+      (todo-insert-sort-button todo-categories-category-label)
+      (if archive
+         (progn
+           (insert (make-string 3 32))
+           (todo-insert-sort-button todo-categories-done-label))
+       (insert (make-string 3 32))
+       (todo-insert-sort-button todo-categories-todo-label)
+       (insert (make-string 2 32))
+       (todo-insert-sort-button todo-categories-diary-label)
+       (insert (make-string 2 32))
+       (todo-insert-sort-button todo-categories-done-label)
+       (insert (make-string 2 32))
+       (todo-insert-sort-button todo-categories-archived-label))
+      (newline 2))))
+
+(defun todo-update-categories-display (sortkey)
+  "Populate table of categories and sort by SORTKEY."
+  (let* ((cats0 todo-categories)
+        (cats (todo-sort cats0 sortkey))
+        (archive (member todo-current-todo-file todo-archives))
+        (todo-categories-category-number 0)
+        ;; Find start of Category button if we just entered Todo Categories
+        ;; mode.
+        (pt (if (eq (point) (point-max))
+                (save-excursion
+                  (forward-line -2)
+                  (goto-char (next-single-char-property-change
+                              (point) 'face nil (line-end-position))))))
+        (buffer-read-only))
+    (forward-line 2)
+    (delete-region (point) (point-max))
+    ;; Fill in the table with buttonized lines, each showing a category and
+    ;; its item counts.
+    (mapc (lambda (cat) (todo-insert-category-line cat sortkey))
+         (mapcar 'car cats))
+    (newline)
+    ;; Add a line showing item count totals.
+    (insert (make-string (+ 4 (length todo-categories-number-separator)) 32)
+           (todo-padded-string todo-categories-totals-label)
+           (mapconcat
+            (lambda (elt)
+              (concat
+               (make-string (1+ (/ (length (car elt)) 2)) 32)
+               (format "%3d" (nth (cdr elt) (todo-total-item-counts)))
+               ;; Add an extra space if label length is odd.
+               (when (cl-oddp (length (car elt))) " ")))
+            (if archive
+                (list (cons todo-categories-done-label 2))
+              (list (cons todo-categories-todo-label 0)
+                    (cons todo-categories-diary-label 1)
+                    (cons todo-categories-done-label 2)
+                    (cons todo-categories-archived-label 3)))
+            ""))
+    ;; Put cursor on Category button initially.
+    (if pt (goto-char pt))
+    (setq buffer-read-only t)))
+
+;; 
-----------------------------------------------------------------------------
+;;; Searching and item filtering
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-search ()
+  "Search for a regular expression in this todo file.
+The search runs through the whole file and encompasses all and
+only todo and done items; it excludes category names.  Multiple
+matches are shown sequentially, highlighted in `todo-search'
+face."
+  (interactive)
+  (let ((regex (read-from-minibuffer "Enter a search string (regexp): "))
+       (opoint (point))
+       matches match cat in-done ov mlen msg)
+    (widen)
+    (goto-char (point-min))
+    (while (not (eobp))
+      (setq match (re-search-forward regex nil t))
+      (goto-char (line-beginning-position))
+      (unless (or (equal (point) 1)
+                 (looking-at (concat "^" (regexp-quote todo-category-beg))))
+       (if match (push match matches)))
+      (forward-line))
+    (setq matches (reverse matches))
+    (if matches
+       (catch 'stop
+         (while matches
+           (setq match (pop matches))
+           (goto-char match)
+           (todo-item-start)
+           (when (looking-at todo-done-string-start)
+             (setq in-done t))
+           (re-search-backward (concat "^" (regexp-quote todo-category-beg)
+                                       "\\(.*\\)\n") nil t)
+           (setq cat (match-string-no-properties 1))
+           (todo-category-number cat)
+           (todo-category-select)
+           (if in-done
+               (unless todo-show-with-done (todo-toggle-view-done-items)))
+           (goto-char match)
+           (setq ov (make-overlay (- (point) (length regex)) (point)))
+           (overlay-put ov 'face 'todo-search)
+           (when matches
+             (setq mlen (length matches))
+             (if (todo-y-or-n-p
+                  (if (> mlen 1)
+                      (format "There are %d more matches; go to next match? "
+                              mlen)
+                    "There is one more match; go to it? "))
+                 (widen)
+               (throw 'stop (setq msg (if (> mlen 1)
+                                          (format "There are %d more matches."
+                                                  mlen)
+                                        "There is one more match."))))))
+         (setq msg "There are no more matches."))
+      (todo-category-select)
+      (goto-char opoint)
+      (message "No match for \"%s\"" regex))
+    (when msg
+      (if (todo-y-or-n-p (concat msg "\nUnhighlight matches? "))
+         (todo-clear-matches)
+       (message "You can unhighlight the matches later by typing %s"
+                (key-description (car (where-is-internal
+                                       'todo-clear-matches))))))))
+
+(defun todo-clear-matches ()
+  "Remove highlighting on matches found by todo-search."
+  (interactive)
+  (remove-overlays 1 (1+ (buffer-size)) 'face 'todo-search))
+
+(defcustom todo-top-priorities-overrides nil
+  "List of rules specifying number of top priority items to show.
+These rules override `todo-top-priorities' on invocations of
+`\\[todo-filter-top-priorities]' and
+`\\[todo-filter-top-priorities-multifile]'.  Each rule is a list
+of the form (FILE NUM ALIST), where FILE is a member of
+`todo-files', NUM is a number specifying the default number of
+top priority items for each category in that file, and ALIST,
+when non-nil, consists of conses of a category name in FILE and a
+number specifying the default number of top priority items in
+that category, which overrides NUM.
+
+This variable should be set interactively by
+`\\[todo-set-top-priorities-in-file]' or
+`\\[todo-set-top-priorities-in-category]'."
+  :type 'sexp
+  :group 'todo-filtered)
+
+(defcustom todo-top-priorities 1
+  "Default number of top priorities shown by `todo-filter-top-priorities'."
+  :type 'integer
+  :group 'todo-filtered)
+
+(defcustom todo-filter-files nil
+  "List of default files for multifile item filtering."
+  :type `(set ,@(mapcar (lambda (f) (list 'const f))
+                       (mapcar 'todo-short-file-name
+                               (funcall todo-files-function))))
+  :group 'todo-filtered)
+
+(defcustom todo-filter-done-items nil
+  "Non-nil to include done items when processing regexp filters.
+Done items from corresponding archive files are also included."
+  :type 'boolean
+  :group 'todo-filtered)
+
+(defun todo-set-top-priorities-in-file ()
+  "Set number of top priorities for this file.
+See `todo-set-top-priorities' for more details."
+  (interactive)
+  (todo-set-top-priorities))
+
+(defun todo-set-top-priorities-in-category ()
+  "Set number of top priorities for this category.
+See `todo-set-top-priorities' for more details."
+  (interactive)
+  (todo-set-top-priorities t))
+
+(defun todo-filter-top-priorities (&optional arg)
+  "Display a list of top priority items from different categories.
+The categories can be any of those in the current todo file.
+
+With numerical prefix ARG show at most ARG top priority items
+from each category.  With `C-u' as prefix argument show the
+numbers of top priority items specified by category in
+`todo-top-priorities-overrides', if this has an entry for the file(s);
+otherwise show `todo-top-priorities' items per category in the
+file(s).  With no prefix argument, if a top priorities file for
+the current todo file has previously been saved (see
+`todo-save-filtered-items-buffer'), visit this file; if there is
+no such file, build the list as with prefix argument `C-u'.
+
+  The prefix ARG regulates how many top priorities from
+each category to show, as described above."
+  (interactive "P")
+  (todo-filter-items 'top arg))
+
+(defun todo-filter-top-priorities-multifile (&optional arg)
+  "Display a list of top priority items from different categories.
+The categories are a subset of the categories in the files listed
+in `todo-filter-files', or if this nil, in the files chosen from
+a file selection dialog that pops up in this case.
+
+With numerical prefix ARG show at most ARG top priority items
+from each category in each file.  With `C-u' as prefix argument
+show the numbers of top priority items specified in
+`todo-top-priorities-overrides', if this is non-nil; otherwise show
+`todo-top-priorities' items per category.  With no prefix
+argument, if a top priorities file for the chosen todo files
+exists (see `todo-save-filtered-items-buffer'), visit this file;
+if there is no such file, do the same as with prefix argument
+`C-u'."
+  (interactive "P")
+  (todo-filter-items 'top arg t))
+
+(defun todo-filter-diary-items (&optional arg)
+  "Display a list of todo diary items from different categories.
+The categories can be any of those in the current todo file.
+
+Called with no prefix ARG, if a diary items file for the current
+todo file has previously been saved (see
+`todo-save-filtered-items-buffer'), visit this file; if there is
+no such file, build the list of diary items.  Called with a
+prefix argument, build the list even if there is a saved file of
+diary items."
+  (interactive "P")
+  (todo-filter-items 'diary arg))
+
+(defun todo-filter-diary-items-multifile (&optional arg)
+  "Display a list of todo diary items from different categories.
+The categories are a subset of the categories in the files listed
+in `todo-filter-files', or if this nil, in the files chosen from
+a file selection dialog that pops up in this case.
+
+Called with no prefix ARG, if a diary items file for the chosen
+todo files has previously been saved (see
+`todo-save-filtered-items-buffer'), visit this file; if there is
+no such file, build the list of diary items.  Called with a
+prefix argument, build the list even if there is a saved file of
+diary items."
+  (interactive "P")
+  (todo-filter-items 'diary arg t))
+
+(defun todo-filter-regexp-items (&optional arg)
+  "Prompt for a regular expression and display items that match it.
+The matches can be from any categories in the current todo file
+and with non-nil option `todo-filter-done-items', can include
+not only todo items but also done items, including those in
+Archive files.
+
+Called with no prefix ARG, if a regexp items file for the current
+todo file has previously been saved (see
+`todo-save-filtered-items-buffer'), visit this file; if there is
+no such file, build the list of regexp items.  Called with a
+prefix argument, build the list even if there is a saved file of
+regexp items."
+  (interactive "P")
+  (todo-filter-items 'regexp arg))
+
+(defun todo-filter-regexp-items-multifile (&optional arg)
+  "Prompt for a regular expression and display items that match it.
+The matches can be from any categories in the files listed in
+`todo-filter-files', or if this nil, in the files chosen from a
+file selection dialog that pops up in this case.  With non-nil
+option `todo-filter-done-items', the matches can include not
+only todo items but also done items, including those in Archive
+files.
+
+Called with no prefix ARG, if a regexp items file for the current
+todo file has previously been saved (see
+`todo-save-filtered-items-buffer'), visit this file; if there is
+no such file, build the list of regexp items.  Called with a
+prefix argument, build the list even if there is a saved file of
+regexp items."
+  (interactive "P")
+  (todo-filter-items 'regexp arg t))
+
+(defun todo-find-filtered-items-file ()
+  "Choose a filtered items file and visit it."
+  (interactive)
+  (let ((files (directory-files todo-directory t "\.tod[rty]$" t))
+       falist file)
+    (dolist (f files)
+      (let ((type (cond ((equal (file-name-extension f) "todr") "regexp")
+                       ((equal (file-name-extension f) "todt") "top")
+                       ((equal (file-name-extension f) "tody") "diary"))))
+       (push (cons (concat (todo-short-file-name f) " (" type ")") f)
+             falist)))
+    (setq file (completing-read "Choose a filtered items file: "
+                               falist nil t nil nil (car falist)))
+    (setq file (cdr (assoc-string file falist)))
+    (find-file file)))
+
+(defun todo-go-to-source-item ()
+  "Display the file and category of the filtered item at point."
+  (interactive)
+  (let* ((str (todo-item-string))
+        (buf (current-buffer))
+        (res (todo-find-item str))
+        (found (nth 0 res))
+        (file (nth 1 res))
+        (cat (nth 2 res)))
+    (if (not found)
+       (message "Category %s does not contain this item." cat)
+      (kill-buffer buf)
+      (set-window-buffer (selected-window)
+                        (set-buffer (find-buffer-visiting file)))
+      (setq todo-current-todo-file file)
+      (setq todo-category-number (todo-category-number cat))
+      (let ((todo-show-with-done (if (or todo-filter-done-items
+                                         (eq (cdr found) 'done))
+                                     t
+                                   todo-show-with-done)))
+       (todo-category-select))
+      (goto-char (car found)))))
+
+(defvar todo-multiple-filter-files nil
+  "List of files selected from `todo-multiple-filter-files' widget.")
+
+(defvar todo-multiple-filter-files-widget nil
+  "Variable holding widget created by `todo-multiple-filter-files'.")
+
+(defun todo-multiple-filter-files ()
+  "Pop to a buffer with a widget for choosing multiple filter files."
+  (require 'widget)
+  (eval-when-compile
+    (require 'wid-edit))
+  (with-current-buffer (get-buffer-create "*Todo Filter Files*")
+    (pop-to-buffer (current-buffer))
+    (erase-buffer)
+    (kill-all-local-variables)
+    (widget-insert "Select files for generating the top priorities list.\n\n")
+    (setq todo-multiple-filter-files-widget
+         (widget-create
+          `(set ,@(mapcar (lambda (x) (list 'const x))
+                          (mapcar 'todo-short-file-name
+                                  (funcall todo-files-function))))))
+    (widget-insert "\n")
+    (widget-create 'push-button
+                  :notify (lambda (widget &rest ignore)
+                            (setq todo-multiple-filter-files 'quit)
+                            (quit-window t)
+                            (exit-recursive-edit))
+                  "Cancel")
+    (widget-insert "   ")
+    (widget-create 'push-button
+                  :notify (lambda (&rest ignore)
+                            (setq todo-multiple-filter-files
+                                  (mapcar (lambda (f)
+                                            (file-truename
+                                             (concat todo-directory
+                                                     f ".todo")))
+                                          (widget-value
+                                           todo-multiple-filter-files-widget)))
+                            (quit-window t)
+                            (exit-recursive-edit))
+                  "Apply")
+    (use-local-map widget-keymap)
+    (widget-setup))
+  (message "Click \"Apply\" after selecting files.")
+  (recursive-edit))
+
+(defconst todo-filtered-items-buffer "Todo filtered items"
+  "Initial name of buffer in Todo Filter Items mode.")
+
+(defconst todo-top-priorities-buffer "Todo top priorities"
+  "Buffer type string for `todo-filter-items'.")
+
+(defconst todo-diary-items-buffer "Todo diary items"
+  "Buffer type string for `todo-filter-items'.")
+
+(defconst todo-regexp-items-buffer "Todo regexp items"
+  "Buffer type string for `todo-filter-items'.")
+
+(defun todo-filter-items (filter &optional new multifile)
+  "Display a cross-categorial list of items filtered by FILTER.
+The values of FILTER can be `top' for top priority items, a cons
+of `top' and a number passed by the caller, `diary' for diary
+items, or `regexp' for items matching a regular expresion entered
+by the user.  The items can be from any categories in the current
+todo file or, with non-nil MULTIFILE, from several files.  If NEW
+is nil, visit an appropriate file containing the list of filtered
+items; if there is no such file, or with non-nil NEW, build the
+list and display it.
+
+See the documentation strings of the commands
+`todo-filter-top-priorities', `todo-filter-diary-items',
+`todo-filter-regexp-items', and those of the corresponding
+multifile commands for further details."
+  (let* ((top (eq filter 'top))
+        (diary (eq filter 'diary))
+        (regexp (eq filter 'regexp))
+        (buf (cond (top todo-top-priorities-buffer)
+                   (diary todo-diary-items-buffer)
+                   (regexp todo-regexp-items-buffer)))
+        (flist (if multifile
+                   (or todo-filter-files
+                       (progn (todo-multiple-filter-files)
+                              todo-multiple-filter-files))
+                 (list todo-current-todo-file)))
+        (multi (> (length flist) 1))
+        (fname (if (equal flist 'quit)
+                   ;; Pressed `cancel' in t-m-f-f file selection dialog.
+                   (keyboard-quit)
+                 (concat todo-directory
+                         (mapconcat 'todo-short-file-name flist "-")
+                         (cond (top ".todt")
+                               (diary ".tody")
+                               (regexp ".todr")))))
+        (rxfiles (when regexp
+                   (directory-files todo-directory t ".*\\.todr$" t)))
+        (file-exists (or (file-exists-p fname) rxfiles)))
+    (cond ((and top new (natnump new))
+          (todo-filter-items-1 (cons 'top new) flist))
+         ((and (not new) file-exists)
+          (when (and rxfiles (> (length rxfiles) 1))
+            (let ((rxf (mapcar 'todo-short-file-name rxfiles)))
+              (setq fname (todo-absolute-file-name
+                           (completing-read "Choose a regexp items file: "
+                                            rxf) 'regexp))))
+          (find-file fname)
+          (todo-prefix-overlays)
+          (todo-check-filtered-items-file))
+         (t
+          (todo-filter-items-1 filter flist)))
+    (setq fname (replace-regexp-in-string "-" ", "
+                                         (todo-short-file-name fname)))
+    (rename-buffer (format (concat "%s for file" (if multi "s" "")
+                                  " \"%s\"") buf fname))))
+
+(defun todo-filter-items-1 (filter file-list)
+  "Build a list of items by applying FILTER to FILE-LIST.
+Internal subroutine called by `todo-filter-items', which passes
+the values of FILTER and FILE-LIST."
+  (let ((num (if (consp filter) (cdr filter) todo-top-priorities))
+       (buf (get-buffer-create todo-filtered-items-buffer))
+       (multifile (> (length file-list) 1))
+       regexp fname bufstr cat beg end done)
+    (if (null file-list)
+       (user-error "No files have been chosen for filtering")
+      (with-current-buffer buf
+       (erase-buffer)
+       (kill-all-local-variables)
+       (todo-filtered-items-mode))
+      (when (eq filter 'regexp)
+       (setq regexp (read-string "Enter a regular expression: ")))
+      (save-current-buffer
+       (dolist (f file-list)
+         ;; Before inserting file contents into temp buffer, save a modified
+         ;; buffer visiting it.
+         (let ((bf (find-buffer-visiting f)))
+           (when (buffer-modified-p bf)
+             (with-current-buffer bf (save-buffer))))
+         (setq fname (todo-short-file-name f))
+         (with-temp-buffer
+           (when (and todo-filter-done-items (eq filter 'regexp))
+             ;; If there is a corresponding archive file for the
+             ;; todo file, insert it first and add identifiers for
+             ;; todo-go-to-source-item.
+             (let ((arch (concat (file-name-sans-extension f) ".toda")))
+               (when (file-exists-p arch)
+                 (insert-file-contents arch)
+                 ;; Delete todo archive file's categories sexp.
+                 (delete-region (line-beginning-position)
+                                (1+ (line-end-position)))
+                 (save-excursion
+                   (while (not (eobp))
+                     (when (re-search-forward
+                            (concat (if todo-filter-done-items
+                                        (concat "\\(?:" todo-done-string-start
+                                                "\\|" todo-date-string-start
+                                                "\\)")
+                                      todo-date-string-start)
+                                    todo-date-pattern "\\(?: "
+                                    diary-time-regexp "\\)?"
+                                    (if todo-filter-done-items
+                                        "\\]"
+                                      (regexp-quote todo-nondiary-end)) "?")
+                            nil t)
+                       (insert "(archive) "))
+                     (forward-line))))))
+           (insert-file-contents f)
+           ;; Delete todo file's categories sexp.
+           (delete-region (line-beginning-position) (1+ (line-end-position)))
+           (let (fnum)
+             ;; Unless the number of top priorities to show was
+             ;; passed by the caller, the file-wide value from
+             ;; `todo-top-priorities-overrides', if non-nil, overrides
+             ;; `todo-top-priorities'.
+             (unless (consp filter)
+               (setq fnum (or (nth 1 (assoc f todo-top-priorities-overrides))
+                              todo-top-priorities)))
+             (while (re-search-forward
+                     (concat "^" (regexp-quote todo-category-beg)
+                             "\\(.+\\)\n") nil t)
+               (setq cat (match-string 1))
+               (let (cnum)
+                 ;; Unless the number of top priorities to show was
+                 ;; passed by the caller, the category-wide value
+                 ;; from `todo-top-priorities-overrides', if non-nil,
+                 ;; overrides a non-nil file-wide value from
+                 ;; `todo-top-priorities-overrides' as well as
+                 ;; `todo-top-priorities'.
+                 (unless (consp filter)
+                   (let ((cats (nth 2 (assoc f 
todo-top-priorities-overrides))))
+                     (setq cnum (or (cdr (assoc cat cats)) fnum))))
+                 (delete-region (match-beginning 0) (match-end 0))
+                 (setq beg (point))    ; First item in the current category.
+                 (setq end (if (re-search-forward
+                                (concat "^" (regexp-quote todo-category-beg))
+                                nil t)
+                               (match-beginning 0)
+                             (point-max)))
+                 (goto-char beg)
+                 (setq done
+                       (if (re-search-forward
+                            (concat "\n" (regexp-quote todo-category-done))
+                            end t)
+                           (match-beginning 0)
+                         end))
+                 (unless (and todo-filter-done-items (eq filter 'regexp))
+                   ;; Leave done items.
+                   (delete-region done end)
+                   (setq end done))
+                 (narrow-to-region beg end)    ; Process only current category.
+                 (goto-char (point-min))
+                 ;; Apply the filter.
+                 (cond ((eq filter 'diary)
+                        (while (not (eobp))
+                          (if (looking-at (regexp-quote todo-nondiary-start))
+                              (todo-remove-item)
+                            (todo-forward-item))))
+                       ((eq filter 'regexp)
+                        (while (not (eobp))
+                          (if (looking-at todo-item-start)
+                              (if (string-match regexp (todo-item-string))
+                                  (todo-forward-item)
+                                (todo-remove-item))
+                            ;; Kill lines that aren't part of a todo or done
+                            ;; item (empty or todo-category-done).
+                            (delete-region (line-beginning-position)
+                                           (1+ (line-end-position))))
+                          ;; If last todo item in file matches regexp and
+                          ;; there are no following done items,
+                          ;; todo-category-done string is left dangling,
+                          ;; because todo-forward-item jumps over it.
+                          (if (and (eobp)
+                                   (looking-back
+                                    (concat (regexp-quote todo-done-string)
+                                            "\n")))
+                              (delete-region (point) (progn
+                                                       (forward-line -2)
+                                                       (point))))))
+                       (t ; Filter top priority items.
+                        (setq num (or cnum fnum num))
+                        (unless (zerop num)
+                          (todo-forward-item num))))
+                 (setq beg (point))
+                 ;; Delete non-top-priority items.
+                 (unless (member filter '(diary regexp))
+                   (delete-region beg end))
+                 (goto-char (point-min))
+                 ;; Add file (if using multiple files) and category tags to
+                 ;; item.
+                 (while (not (eobp))
+                   (when (re-search-forward
+                          (concat (if todo-filter-done-items
+                                      (concat "\\(?:" todo-done-string-start
+                                              "\\|" todo-date-string-start
+                                              "\\)")
+                                    todo-date-string-start)
+                                  todo-date-pattern "\\(?: " diary-time-regexp
+                                  "\\)?" (if todo-filter-done-items
+                                             "\\]"
+                                           (regexp-quote todo-nondiary-end))
+                                  "?")
+                          nil t)
+                     (insert " [")
+                     (when (looking-at "(archive) ") (goto-char (match-end 0)))
+                     (insert (if multifile (concat fname ":") "") cat "]"))
+                   (forward-line))
+                 (widen)))
+               (setq bufstr (buffer-string))
+               (with-current-buffer buf
+                 (let (buffer-read-only)
+                   (insert bufstr)))))))
+      (set-window-buffer (selected-window) (set-buffer buf))
+      (todo-prefix-overlays)
+      (goto-char (point-min)))))
+
+(defun todo-set-top-priorities (&optional arg)
+  "Set number of top priorities shown by `todo-filter-top-priorities'.
+With non-nil ARG, set the number only for the current Todo
+category; otherwise, set the number for all categories in the
+current todo file.
+
+Calling this function via either of the commands
+`todo-set-top-priorities-in-file' or
+`todo-set-top-priorities-in-category' is the recommended way to
+set the user customizable option `todo-top-priorities-overrides'."
+  (let* ((cat (todo-current-category))
+        (file todo-current-todo-file)
+        (rules todo-top-priorities-overrides)
+        (frule (assoc-string file rules))
+        (crule (assoc-string cat (nth 2 frule)))
+        (crules (nth 2 frule))
+        (cur (or (if arg (cdr crule) (nth 1 frule))
+                 todo-top-priorities))
+        (prompt (if arg (concat "Number of top priorities in this category"
+                                " (currently %d): ")
+                  (concat "Default number of top priorities per category"
+                                " in this file (currently %d): ")))
+        (new -1)
+        nrule)
+    (while (< new 0)
+      (let ((cur0 cur))
+       (setq new (read-number (format prompt cur0))
+             prompt "Enter a non-negative number: "
+             cur0 nil)))
+    (setq nrule (if arg
+                   (append (delete crule crules) (list (cons cat new)))
+                 (append (list file new) (list crules))))
+    (setq rules (cons (if arg
+                         (list file cur nrule)
+                       nrule)
+                     (delete frule rules)))
+    (customize-save-variable 'todo-top-priorities-overrides rules)
+    (todo-prefix-overlays)))
+
+(defun todo-find-item (str)
+  "Search for filtered item STR in its saved todo file.
+Return the list (FOUND FILE CAT), where CAT and FILE are the
+item's category and file, and FOUND is a cons cell if the search
+succeeds, whose car is the start of the item in FILE and whose
+cdr is `done', if the item is now a done item, `changed', if its
+text was truncated or augmented or, for a top priority item, if
+its priority has changed, and `same' otherwise."
+  (string-match (concat (if todo-filter-done-items
+                           (concat "\\(?:" todo-done-string-start "\\|"
+                                   todo-date-string-start "\\)")
+                         todo-date-string-start)
+                       todo-date-pattern "\\(?: " diary-time-regexp "\\)?"
+                       (if todo-filter-done-items
+                           "\\]"
+                         (regexp-quote todo-nondiary-end)) "?"
+                       "\\(?4: \\[\\(?3:(archive) \\)?\\(?2:.*:\\)?"
+                       "\\(?1:.*\\)\\]\\).*$") str)
+  (let ((cat (match-string 1 str))
+       (file (match-string 2 str))
+       (archive (string= (match-string 3 str) "(archive) "))
+       (filcat (match-string 4 str))
+       (tpriority 1)
+       (tpbuf (save-match-data (string-match "top" (buffer-name))))
+       found)
+    (setq str (replace-match "" nil nil str 4))
+    (when tpbuf
+      ;; Calculate priority of STR wrt its category.
+      (save-excursion
+       (while (search-backward filcat nil t)
+           (setq tpriority (1+ tpriority)))))
+    (setq file (if file
+                  (concat todo-directory (substring file 0 -1)
+                          (if archive ".toda" ".todo"))
+                (if archive
+                    (concat (file-name-sans-extension
+                             todo-global-current-todo-file) ".toda")
+                  todo-global-current-todo-file)))
+    (find-file-noselect file)
+    (with-current-buffer (find-buffer-visiting file)
+      (save-restriction
+       (widen)
+       (goto-char (point-min))
+       (let ((beg (re-search-forward
+                   (concat "^" (regexp-quote (concat todo-category-beg cat))
+                           "$")
+                   nil t))
+             (done (save-excursion
+                     (re-search-forward
+                      (concat "^" (regexp-quote todo-category-done)) nil t)))
+             (end (save-excursion
+                    (or (re-search-forward
+                         (concat "^" (regexp-quote todo-category-beg))
+                         nil t)
+                        (point-max)))))
+         (setq found (when (search-forward str end t)
+                       (goto-char (match-beginning 0))))
+         (when found
+           (setq found
+                 (cons found (if (> (point) done)
+                                 'done
+                               (let ((cpriority 1))
+                                 (when tpbuf
+                                   (save-excursion
+                                     ;; Not top item in category.
+                                     (while (> (point) (1+ beg))
+                                       (let ((opoint (point)))
+                                         (todo-backward-item)
+                                         ;; Can't move backward beyond
+                                         ;; first item in file.
+                                         (unless (= (point) opoint)
+                                           (setq cpriority (1+ cpriority)))))))
+                                 (if (and (= tpriority cpriority)
+                                          ;; Proper substring is not the same.
+                                          (string= (todo-item-string)
+                                                   str))
+                                     'same
+                                   'changed)))))))))
+      (list found file cat)))
+
+(defun todo-check-filtered-items-file ()
+  "Check if filtered items file is up to date and a show suitable message."
+  ;; (catch 'old
+  (let ((count 0))
+    (while (not (eobp))
+      (let* ((item (todo-item-string))
+            (found (car (todo-find-item item))))
+       (unless (eq (cdr found) 'same)
+         (save-excursion
+           (overlay-put (make-overlay (todo-item-start) (todo-item-end))
+                        'face 'todo-search))
+         (setq count (1+ count))))
+         ;; (throw 'old (message "The marked item is not up to date.")))
+      (todo-forward-item))
+    (if (zerop count)
+       (message "Filtered items file is up to date.")
+      (message (concat "The highlighted item" (if (= count 1) " is " "s are ")
+                      "not up to date."
+                      ;; "\nType <return> on item for details."
+                      )))))
+
+(defun todo-filter-items-filename ()
+  "Return absolute file name for saving this Filtered Items buffer."
+  (let ((bufname (buffer-name)))
+    (string-match "\"\\([^\"]+\\)\"" bufname)
+    (let* ((filename-str (substring bufname (match-beginning 1) (match-end 1)))
+          (filename-base (replace-regexp-in-string ", " "-" filename-str))
+          (top-priorities (string-match "top priorities" bufname))
+          (diary-items (string-match "diary items" bufname))
+          (regexp-items (string-match "regexp items" bufname)))
+      (when regexp-items
+       (let ((prompt (concat "Enter a short identifying string"
+                             " to make this file name unique: ")))
+         (setq filename-base (concat filename-base "-" (read-string prompt)))))
+      (concat todo-directory filename-base
+             (cond (top-priorities ".todt")
+                   (diary-items ".tody")
+                   (regexp-items ".todr"))))))
+
+(defun todo-save-filtered-items-buffer ()
+  "Save current Filtered Items buffer to a file.
+If the file already exists, overwrite it only on confirmation."
+  (let ((filename (or (buffer-file-name) (todo-filter-items-filename))))
+    (write-file filename t)))
+
+;; 
-----------------------------------------------------------------------------
+;;; Printing Todo mode buffers
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-print-buffer-function 'ps-print-buffer-with-faces
+  "Function called by the command `todo-print-buffer'."
+  :type 'symbol
+  :group 'todo)
+
+(defvar todo-print-buffer "*Todo Print*"
+  "Name of buffer with printable version of Todo mode buffer.")
+
+(defun todo-print-buffer (&optional to-file)
+  "Produce a printable version of the current Todo mode buffer.
+This converts overlays and soft line wrapping and, depending on
+the value of `todo-print-buffer-function', includes faces.  With
+non-nil argument TO-FILE write the printable version to a file;
+otherwise, send it to the default printer."
+  (interactive)
+  (let ((buf todo-print-buffer)
+       (header (cond
+                ((eq major-mode 'todo-mode)
+                 (concat "Todo File: "
+                         (todo-short-file-name todo-current-todo-file)
+                         "\nCategory: " (todo-current-category)))
+                ((eq major-mode 'todo-filtered-items-mode)
+                 (buffer-name))))
+       (prefix (propertize (concat todo-prefix " ")
+                           'face 'todo-prefix-string))
+       (num 0)
+       (fill-prefix (make-string todo-indent-to-here 32))
+       (content (buffer-string))
+       file)
+    (with-current-buffer (get-buffer-create buf)
+      (insert content)
+      (goto-char (point-min))
+      (while (not (eobp))
+       (let ((beg (point))
+             (end (save-excursion (todo-item-end))))
+         (when todo-number-prefix
+           (setq num (1+ num))
+           (setq prefix (propertize (concat (number-to-string num) " ")
+                                    'face 'todo-prefix-string)))
+         (insert prefix)
+         (fill-region beg end))
+       ;; Calling todo-forward-item infloops at todo-item-start due to
+       ;; non-overlay prefix, so search for item start instead.
+       (if (re-search-forward todo-item-start nil t)
+           (beginning-of-line)
+         (goto-char (point-max))))
+      (if (re-search-backward (concat "^" (regexp-quote todo-category-done))
+                             nil t)
+         (replace-match todo-done-separator))
+      (goto-char (point-min))
+      (insert header)
+      (newline 2)
+      (if to-file
+         (let ((file (read-file-name "Print to file: ")))
+           (funcall todo-print-buffer-function file))
+       (funcall todo-print-buffer-function)))
+    (kill-buffer buf)))
+
+(defun todo-print-buffer-to-file ()
+  "Save printable version of this Todo mode buffer to a file."
+  (interactive)
+  (todo-print-buffer t))
+
+;; 
-----------------------------------------------------------------------------
+;;; Legacy Todo mode files
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-legacy-date-time-regexp
+  (concat "\\(?1:[0-9]\\{4\\}\\)-\\(?2:[0-9]\\{2\\}\\)-"
+         "\\(?3:[0-9]\\{2\\}\\) \\(?4:[0-9]\\{2\\}:[0-9]\\{2\\}\\)")
+  "Regexp matching legacy todo-mode.el item date-time strings.
+In order for `todo-convert-legacy-files' to correctly convert
+this string to the current Todo mode format, the regexp must
+contain four explicitly numbered groups (see `(elisp) Regexp
+Backslash'), where group 1 matches a string for the year, group 2
+a string for the month, group 3 a string for the day and group 4
+a string for the time.  The default value converts date-time
+strings built using the default value of
+`todo-time-string-format' from todo-mode.el."
+  :type 'regexp
+  :group 'todo)
+
+(defun todo-convert-legacy-date-time ()
+  "Return converted date-time string.
+Helper function for `todo-convert-legacy-files'."
+  (let* ((year (match-string 1))
+        (month (match-string 2))
+        (monthname (calendar-month-name (string-to-number month) t))
+        (day (match-string 3))
+        (time (match-string 4))
+        dayname)
+    (replace-match "")
+    (insert (mapconcat 'eval calendar-date-display-form "")
+           (when time (concat " " time)))))
+
+(defun todo-convert-legacy-files ()
+  "Convert legacy todo files to the current Todo mode format.
+The old-style files named by the variables `todo-file-do' and
+`todo-file-done' from the old package are converted to the new
+format and saved (the latter as a todo archive file) with a new
+name in `todo-directory'.  See also the documentation string of
+`todo-legacy-date-time-regexp' for further details."
+  (interactive)
+  ;; If there are user customizations of legacy options, use them,
+  ;; otherwise use the legacy default values.
+  (let ((todo-file-do-tem (if (boundp 'todo-file-do)
+                             todo-file-do
+                           (locate-user-emacs-file "todo-do" ".todo-do")))
+       (todo-file-done-tem (if (boundp 'todo-file-done)
+                               todo-file-done
+                             (locate-user-emacs-file "todo-done" 
".todo-done")))
+       (todo-initials-tem (and (boundp 'todo-initials) todo-initials))
+       (todo-entry-prefix-function-tem (and (boundp 
'todo-entry-prefix-function)
+                                            todo-entry-prefix-function))
+       todo-prefix-tem)
+    ;; Convert `todo-file-do'.
+    (if (not (file-exists-p todo-file-do-tem))
+       (message "No legacy todo file exists")
+      (let ((default "todo-do-conv")
+           file archive-sexp)
+       (with-temp-buffer
+         (insert-file-contents todo-file-do-tem)
+         ;; Eliminate old-style local variables list in first line.
+         (delete-region (line-beginning-position) (1+ (line-end-position)))
+         (search-forward " --- " nil t) ; Legacy todo-category-beg.
+         (setq todo-prefix-tem (buffer-substring-no-properties
+                                (line-beginning-position) (match-beginning 0)))
+         (goto-char (point-min))
+         (while (not (eobp))
+           (cond
+            ;; Old-style category start delimiter.
+            ((looking-at (regexp-quote (concat todo-prefix-tem " --- ")))
+             (replace-match todo-category-beg))
+            ;; Old-style category end delimiter.
+            ((looking-at (regexp-quote "--- End"))
+             (replace-match ""))
+            ;; Old-style category separator.
+            ((looking-at (regexp-quote
+                          (concat todo-prefix-tem " "
+                                  (make-string 75 ?-))))
+             (replace-match todo-category-done))
+            ;; Old-style item header (date/time/initials).
+            ((looking-at (concat (regexp-quote todo-prefix-tem) " "
+                                 (if todo-entry-prefix-function-tem
+                                     (funcall todo-entry-prefix-function-tem)
+                                   (concat todo-legacy-date-time-regexp " "
+                                           (if todo-initials-tem
+                                               (regexp-quote todo-initials-tem)
+                                             "[^:]*")
+                                           ":"))))
+             (todo-convert-legacy-date-time)))
+           (forward-line))
+         (setq file (concat todo-directory
+                            (read-string
+                             (format "Save file as (default \"%s\"): " default)
+                             nil nil default)
+                            ".todo"))
+         (unless (file-exists-p todo-directory)
+           (make-directory todo-directory))
+         (write-region (point-min) (point-max) file nil 'nomessage nil t))
+       (with-temp-buffer
+         (insert-file-contents file)
+         (let ((todo-categories (todo-make-categories-list t)))
+           (todo-update-categories-sexp)
+           (todo-check-format))
+         (write-region (point-min) (point-max) file nil 'nomessage))
+       (setq todo-files (funcall todo-files-function))
+       ;; Convert `todo-file-done'.
+       (when (file-exists-p todo-file-done-tem)
+         (with-temp-buffer
+           (insert-file-contents todo-file-done-tem)
+           (let ((beg (make-marker))
+                 (end (make-marker))
+                 cat cats comment item)
+             (while (not (eobp))
+               (when (looking-at todo-legacy-date-time-regexp)
+                 (set-marker beg (point))
+                 (todo-convert-legacy-date-time)
+                 (set-marker end (point))
+                 (goto-char beg)
+                 (insert "[" todo-done-string)
+                 (goto-char end)
+                 (insert "]")
+                 (forward-char)
+                 (when (looking-at todo-legacy-date-time-regexp)
+                   (todo-convert-legacy-date-time))
+                 (when (looking-at (concat " " (if todo-initials-tem
+                                                   (regexp-quote
+                                                    todo-initials-tem)
+                                                 "[^:]*")
+                                           ":"))
+                   (replace-match "")))
+               (if (re-search-forward
+                    (concat "^" todo-legacy-date-time-regexp) nil t)
+                   (goto-char (match-beginning 0))
+                 (goto-char (point-max)))
+               (backward-char)
+               (when (looking-back "\\[\\([^][]+\\)\\]")
+                 (setq cat (match-string 1))
+                 (goto-char (match-beginning 0))
+                 (replace-match ""))
+               ;; If the item ends with a non-comment parenthesis not
+               ;; followed by a period, we lose (but we inherit that
+               ;; problem from the legacy code).
+               (when (looking-back "(\\(.*\\)) ")
+                 (setq comment (match-string 1))
+                 (replace-match "")
+                 (insert "[" todo-comment-string ": " comment "]"))
+               (set-marker end (point))
+               (if (member cat cats)
+                   ;; If item is already in its category, leave it there.
+                   (unless (save-excursion
+                             (re-search-backward
+                              (concat "^" (regexp-quote todo-category-beg)
+                                      "\\(.*\\)$") nil t)
+                             (string= (match-string 1) cat))
+                     ;; Else move it to its category.
+                     (setq item (buffer-substring-no-properties beg end))
+                     (delete-region beg (1+ end))
+                     (set-marker beg (point))
+                     (re-search-backward
+                      (concat "^"
+                              (regexp-quote (concat todo-category-beg cat))
+                              "$")
+                      nil t)
+                     (forward-line)
+                     (if (re-search-forward
+                          (concat "^" (regexp-quote todo-category-beg)
+                                  "\\(.*\\)$") nil t)
+                         (progn (goto-char (match-beginning 0))
+                                (newline)
+                                (forward-line -1))
+                       (goto-char (point-max)))
+                     (insert item "\n")
+                     (goto-char beg))
+                 (push cat cats)
+                 (goto-char beg)
+                 (insert todo-category-beg cat "\n\n"
+                         todo-category-done "\n"))
+               (forward-line))
+             (set-marker beg nil)
+             (set-marker end nil))
+           (setq file (concat (file-name-sans-extension file) ".toda"))
+           (write-region (point-min) (point-max) file nil 'nomessage nil t))
+         (with-temp-buffer
+           (insert-file-contents file)
+           (let* ((todo-categories (todo-make-categories-list t)))
+             (todo-update-categories-sexp)
+             (todo-check-format))
+           (write-region (point-min) (point-max) file nil 'nomessage)
+           (setq archive-sexp (read (buffer-substring-no-properties
+                                     (line-beginning-position)
+                                     (line-end-position)))))
+         (setq file (concat (file-name-sans-extension file) ".todo"))
+         ;; Update categories sexp of converted todo file again, adding
+         ;; counts of archived items.
+         (with-temp-buffer
+           (insert-file-contents file)
+           (let ((sexp (read (buffer-substring-no-properties
+                              (line-beginning-position)
+                              (line-end-position)))))
+             (dolist (cat sexp)
+               (let ((archive-cat (assoc (car cat) archive-sexp)))
+                 (if archive-cat
+                     (aset (cdr cat) 3 (aref (cdr archive-cat) 2)))))
+             (delete-region (line-beginning-position) (line-end-position))
+             (prin1 sexp (current-buffer)))
+           (write-region (point-min) (point-max) file nil 'nomessage))
+         (setq todo-archives (funcall todo-files-function t)))
+       (todo-reevaluate-filelist-defcustoms)
+       (when (y-or-n-p (concat "Format conversion done; do you want to "
+                               "visit the converted file now? "))
+         (setq todo-current-todo-file file)
+         (unless todo-default-todo-file
+           ;; We just initialized the first todo file, so make it the
+           ;; default now to avoid an infinite recursion with todo-show.
+           (setq todo-default-todo-file (todo-short-file-name file)))
+         (todo-show))))))
+
+;; 
-----------------------------------------------------------------------------
+;;; Utility functions for todo files, categories and items
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-absolute-file-name (name &optional type)
+  "Return the absolute file name of short todo file NAME.
+With TYPE `archive' or `top' return the absolute file name of the
+short todo archive or top priorities file name, respectively."
+  ;; No-op if there is no todo file yet (i.e. don't concatenate nil).
+  (when name
+    (file-truename
+     (concat todo-directory name
+            (cond ((eq type 'archive) ".toda")
+                  ((eq type 'top) ".todt")
+                  ((eq type 'diary) ".tody")
+                  ((eq type 'regexp) ".todr")
+                  (t ".todo"))))))
+
+(defun todo-category-number (cat)
+  "Return the number of category CAT in this todo file.
+The buffer-local variable `todo-category-number' holds this
+number as its value."
+  (let ((categories (mapcar 'car todo-categories)))
+    (setq todo-category-number
+         ;; Increment by one, so that the highest priority category in Todo
+         ;; Categories mode is numbered one rather than zero.
+         (1+ (- (length categories)
+                (length (member cat categories)))))))
+
+(defun todo-current-category ()
+  "Return the name of the current category."
+  (car (nth (1- todo-category-number) todo-categories)))
+
+(defun todo-category-select ()
+  "Display the current category correctly."
+  (let ((name (todo-current-category))
+       cat-begin cat-end done-start done-sep-start done-end)
+    (widen)
+    (goto-char (point-min))
+    (re-search-forward
+     (concat "^" (regexp-quote (concat todo-category-beg name)) "$") nil t)
+    (setq cat-begin (1+ (line-end-position)))
+    (setq cat-end (if (re-search-forward
+                      (concat "^" (regexp-quote todo-category-beg)) nil t)
+                     (match-beginning 0)
+                   (point-max)))
+    (setq mode-line-buffer-identification
+         (funcall todo-mode-line-function name))
+    (narrow-to-region cat-begin cat-end)
+    (todo-prefix-overlays)
+    (goto-char (point-min))
+    (if (re-search-forward (concat "\n\\(" (regexp-quote todo-category-done)
+                                  "\\)") nil t)
+       (progn
+         (setq done-start (match-beginning 0))
+         (setq done-sep-start (match-beginning 1))
+         (setq done-end (match-end 0)))
+      (error "Category %s is missing todo-category-done string" name))
+    (if todo-show-done-only
+       (narrow-to-region (1+ done-end) (point-max))
+      (when (and todo-show-with-done
+                (re-search-forward todo-done-string-start nil t))
+       ;; Now we want to see the done items, so reset displayed end to end of
+       ;; done items.
+       (setq done-start cat-end)
+       ;; Make display overlay for done items separator string, unless there
+       ;; already is one.
+       (let* ((done-sep todo-done-separator)
+              (ov (progn (goto-char done-sep-start)
+                         (todo-get-overlay 'separator))))
+         (unless ov
+           (setq ov (make-overlay done-sep-start done-end))
+           (overlay-put ov 'todo 'separator)
+           (overlay-put ov 'display done-sep))))
+      (narrow-to-region (point-min) done-start)
+      ;; Loading this from todo-mode, or adding it to the mode hook, causes
+      ;; Emacs to hang in todo-item-start, at (looking-at todo-item-start).
+      (when todo-highlight-item
+       (require 'hl-line)
+       (hl-line-mode 1)))))
+
+(defun todo-get-count (type &optional category)
+  "Return count of TYPE items in CATEGORY.
+If CATEGORY is nil, default to the current category."
+  (let* ((cat (or category (todo-current-category)))
+        (counts (cdr (assoc cat todo-categories)))
+        (idx (cond ((eq type 'todo) 0)
+                   ((eq type 'diary) 1)
+                   ((eq type 'done) 2)
+                   ((eq type 'archived) 3))))
+    (aref counts idx)))
+
+(defun todo-update-count (type increment &optional category)
+  "Change count of TYPE items in CATEGORY by integer INCREMENT.
+With nil or omitted CATEGORY, default to the current category."
+  (let* ((cat (or category (todo-current-category)))
+        (counts (cdr (assoc cat todo-categories)))
+        (idx (cond ((eq type 'todo) 0)
+                   ((eq type 'diary) 1)
+                   ((eq type 'done) 2)
+                   ((eq type 'archived) 3))))
+    (aset counts idx (+ increment (aref counts idx)))))
+
+(defun todo-set-categories ()
+  "Set `todo-categories' from the sexp at the top of the file."
+  ;; New archive files created by `todo-move-category' are empty, which would
+  ;; make the sexp test fail and raise an error, so in this case we skip it.
+  (unless (zerop (buffer-size))
+    (save-excursion
+      (save-restriction
+       (widen)
+       (goto-char (point-min))
+       (setq todo-categories
+             (if (looking-at "\(\(\"")
+                 (read (buffer-substring-no-properties
+                        (line-beginning-position)
+                        (line-end-position)))
+               (error "Invalid or missing todo-categories sexp")))))))
+
+(defun todo-update-categories-sexp ()
+  "Update the `todo-categories' sexp at the top of the file."
+  (let (buffer-read-only)
+    (save-excursion
+      (save-restriction
+       (widen)
+       (goto-char (point-min))
+       (if (looking-at (concat "^" (regexp-quote todo-category-beg)))
+           (progn (newline) (goto-char (point-min)) ; Make space for sexp.
+                  (setq todo-categories (todo-make-categories-list t)))
+         (delete-region (line-beginning-position) (line-end-position)))
+       (prin1 todo-categories (current-buffer))))))
+
+(defun todo-make-categories-list (&optional force)
+  "Return an alist of todo categories and their item counts.
+With non-nil argument FORCE parse the entire file to build the
+list; otherwise, get the value by reading the sexp at the top of
+the file."
+  (setq todo-categories nil)
+  (save-excursion
+    (save-restriction
+      (widen)
+      (goto-char (point-min))
+      (let (counts cat archive)
+       ;; If the file is a todo file and has archived items, identify the
+       ;; archive, in order to count its items.  But skip this with
+       ;; `todo-convert-legacy-files', since that converts filed items to
+       ;; archived items.
+       (when buffer-file-name   ; During conversion there is no file yet.
+         ;; If the file is an archive, it doesn't have an archive.
+         (unless (member (file-truename buffer-file-name)
+                         (funcall todo-files-function t))
+           (setq archive (concat (file-name-sans-extension
+                                  todo-current-todo-file) ".toda"))))
+       (while (not (eobp))
+         (cond ((looking-at (concat (regexp-quote todo-category-beg)
+                                    "\\(.*\\)\n"))
+                (setq cat (match-string-no-properties 1))
+                ;; Counts for each category: [todo diary done archive]
+                (setq counts (make-vector 4 0))
+                (setq todo-categories
+                      (append todo-categories (list (cons cat counts))))
+                ;; Add archived item count to the todo file item counts.
+                ;; Make sure to include newly created archives, e.g. due to
+                ;; todo-move-category.
+                (when (member archive (funcall todo-files-function t))
+                  (let ((archive-count 0))
+                    (with-current-buffer (find-file-noselect archive)
+                      (widen)
+                      (goto-char (point-min))
+                      (when (re-search-forward
+                             (concat "^" (regexp-quote todo-category-beg)
+                                     cat "$")
+                             (point-max) t)
+                        (forward-line)
+                        (while (not (or (looking-at
+                                         (concat
+                                          (regexp-quote todo-category-beg)
+                                          "\\(.*\\)\n"))
+                                        (eobp)))
+                          (when (looking-at todo-done-string-start)
+                            (setq archive-count (1+ archive-count)))
+                          (forward-line))))
+                    (todo-update-count 'archived archive-count cat))))
+               ((looking-at todo-done-string-start)
+                (todo-update-count 'done 1 cat))
+               ((looking-at (concat "^\\("
+                                    (regexp-quote diary-nonmarking-symbol)
+                                    "\\)?" todo-date-pattern))
+                (todo-update-count 'diary 1 cat)
+                (todo-update-count 'todo 1 cat))
+               ((looking-at (concat todo-date-string-start todo-date-pattern))
+                (todo-update-count 'todo 1 cat))
+               ;; If first line is todo-categories list, use it and end loop
+               ;; -- unless FORCEd to scan whole file.
+               ((bobp)
+                (unless force
+                  (setq todo-categories (read (buffer-substring-no-properties
+                                                (line-beginning-position)
+                                                (line-end-position))))
+                  (goto-char (1- (point-max))))))
+         (forward-line)))))
+  todo-categories)
+
+(defun todo-repair-categories-sexp ()
+  "Repair corrupt todo file categories sexp.
+This should only be needed as a consequence of careless manual
+editing or a bug in todo.el.
+
+*Warning*: Calling this command restores the category order to
+the list element order in the todo file categories sexp, so any
+order changes made in Todo Categories mode will have to be made
+again."
+  (interactive)
+  (let ((todo-categories (todo-make-categories-list t)))
+    (todo-update-categories-sexp)))
+
+(defun todo-check-format ()
+  "Signal an error if the current todo file is ill-formatted.
+Otherwise return t.  Display a message if the file is well-formed
+but the categories sexp differs from the current value of
+`todo-categories'."
+  (save-excursion
+    (save-restriction
+      (widen)
+      (goto-char (point-min))
+      (let* ((cats (prin1-to-string todo-categories))
+            (ssexp (buffer-substring-no-properties (line-beginning-position)
+                                                   (line-end-position)))
+            (sexp (read ssexp)))
+       ;; Check the first line for `todo-categories' sexp.
+       (dolist (c sexp)
+         (let ((v (cdr c)))
+           (unless (and (stringp (car c))
+                        (vectorp v)
+                        (= 4 (length v)))
+             (user-error "Invalid or missing todo-categories sexp"))))
+       (forward-line)
+       ;; Check well-formedness of categories.
+       (let ((legit (concat
+                     "\\(^" (regexp-quote todo-category-beg) "\\)"
+                     "\\|\\(" todo-date-string-start todo-date-pattern "\\)"
+                     "\\|\\(^[ \t]+[^ \t]*\\)"
+                     "\\|^$"
+                     "\\|\\(^" (regexp-quote todo-category-done) "\\)"
+                     "\\|\\(" todo-done-string-start "\\)")))
+         (while (not (eobp))
+           (unless (looking-at legit)
+             (user-error "Illegitimate todo file format at line %d"
+                    (line-number-at-pos (point))))
+           (forward-line)))
+       ;; Warn user if categories sexp has changed.
+       (unless (string= ssexp cats)
+         (message (concat "The sexp at the beginning of the file differs "
+                          "from the value of `todo-categories.\n"
+                          "If the sexp is wrong, you can fix it with "
+                          "M-x todo-repair-categories-sexp,\n"
+                          "but note this reverts any changes you have "
+                          "made in the order of the categories."))))))
+  t)
+
+(defun todo-item-start ()
+  "Move to start of current todo item and return its position."
+  (unless (or
+          ;; Buffer is empty (invocation possible e.g. via todo-forward-item
+          ;; from todo-filter-items when processing category with no todo
+          ;; items).
+          (eq (point-min) (point-max))
+          ;; Point is on the empty line below category's last todo item...
+          (and (looking-at "^$")
+               (or (eobp)              ; ...and done items are hidden...
+                   (save-excursion     ; ...or done items are visible.
+                     (forward-line)
+                     (looking-at (concat "^"
+                                         (regexp-quote todo-category-done))))))
+          ;; Buffer is widened.
+          (looking-at (regexp-quote todo-category-beg)))
+    (goto-char (line-beginning-position))
+    (while (not (looking-at todo-item-start))
+      (forward-line -1))
+    (point)))
+
+(defun todo-item-end ()
+  "Move to end of current todo item and return its position."
+  ;; Items cannot end with a blank line.
+  (unless (looking-at "^$")
+    (let* ((done (todo-done-item-p))
+          (to-lim nil)
+          ;; For todo items, end is before the done items section, for done
+          ;; items, end is before the next category.  If these limits are
+          ;; missing or inaccessible, end it before the end of the buffer.
+          (lim (if (save-excursion
+                     (re-search-forward
+                      (concat "^" (regexp-quote (if done
+                                                    todo-category-beg
+                                                  todo-category-done)))
+                      nil t))
+                   (progn (setq to-lim t) (match-beginning 0))
+                 (point-max))))
+      (when (bolp) (forward-char))     ; Find start of next item.
+      (goto-char (if (re-search-forward todo-item-start lim t)
+                    (match-beginning 0)
+                  (if to-lim lim (point-max))))
+      ;; For last todo item, skip back over the empty line before the done
+      ;; items section, else just back to the end of the previous line.
+      (backward-char (when (and to-lim (not done) (eq (point) lim)) 2))
+      (point))))
+
+(defun todo-item-string ()
+  "Return bare text of current item as a string."
+  (let ((opoint (point))
+       (start (todo-item-start))
+       (end (todo-item-end)))
+    (goto-char opoint)
+    (and start end (buffer-substring-no-properties start end))))
+
+(defun todo-forward-item (&optional count)
+  "Move point COUNT items down (by default, move down by one item)."
+  (let* ((not-done (not (or (todo-done-item-p) (looking-at "^$"))))
+        (start (line-end-position)))
+    (goto-char start)
+    (if (re-search-forward todo-item-start nil t (or count 1))
+       (goto-char (match-beginning 0))
+      (goto-char (point-max)))
+    ;; If points advances by one from a todo to a done item, go back
+    ;; to the space above todo-done-separator, since that is a
+    ;; legitimate place to insert an item.  But skip this space if
+    ;; count > 1, since that should only stop on an item.
+    (when (and not-done (todo-done-item-p) (not count))
+      ;; (if (or (not count) (= count 1))
+         (re-search-backward "^$" start t))));)
+    ;; The preceding sexp is insufficient when buffer is not narrowed,
+    ;; since there could be no done items in this category, so the
+    ;; search puts us on first todo item of next category.  Does this
+    ;; ever happen?  If so:
+    ;; (let ((opoint) (point))
+    ;;   (forward-line -1)
+    ;;   (when (or (not count) (= count 1))
+    ;;         (cond ((looking-at (concat "^" (regexp-quote 
todo-category-beg)))
+    ;;                (forward-line -2))
+    ;;               ((looking-at (concat "^" (regexp-quote 
todo-category-done)))
+    ;;                (forward-line -1))
+    ;;               (t
+    ;;                (goto-char opoint)))))))
+
+(defun todo-backward-item (&optional count)
+  "Move point up to start of item with next higher priority.
+With positive numerical prefix COUNT, move point COUNT items
+upward.
+
+If the category's done items are visible, this command called
+with a prefix argument only moves point to a higher item, e.g.,
+with point on the first done item and called with prefix 1, it
+moves to the last todo item; but if called with point on the
+first done item without a prefix argument, it moves point the the
+empty line above the done items separator."
+  (let* ((done (todo-done-item-p)))
+    (todo-item-start)
+    (unless (bobp)
+      (re-search-backward todo-item-start nil t (or count 1)))
+    ;; Unless this is a regexp filtered items buffer (which can contain
+    ;; intermixed todo and done items), if points advances by one from a
+    ;; done to a todo item, go back to the space above
+    ;; todo-done-separator, since that is a legitimate place to insert an
+    ;; item.  But skip this space if count > 1, since that should only
+    ;; stop on an item.
+    (when (and done (not (todo-done-item-p)) (not count)
+                                   ;(or (not count) (= count 1))
+              (not (equal (buffer-name) todo-regexp-items-buffer)))
+      (re-search-forward (concat "^" (regexp-quote todo-category-done))
+                        nil t)
+      (forward-line -1))))
+
+(defun todo-remove-item ()
+  "Internal function called in editing, deleting or moving items."
+  (let* ((end (progn (todo-item-end) (1+ (point))))
+        (beg (todo-item-start))
+        (ov (todo-get-overlay 'prefix)))
+    (when ov (delete-overlay ov))
+    (delete-region beg end)))
+
+(defun todo-diary-item-p ()
+  "Return non-nil if item at point has diary entry format."
+  (save-excursion
+    (when (todo-item-string)           ; Exclude empty lines.
+      (todo-item-start)
+      (not (looking-at (regexp-quote todo-nondiary-start))))))
+
+;; This duplicates the item locating code from diary-goto-entry, but
+;; without the marker code, to test whether the latter is dispensible.
+;; If it is, diary-goto-entry can be simplified.  The code duplication
+;; here can also be eliminated, leaving only the widening and category
+;; selection, and instead of :override advice :around can be used.
+
+(defun todo-diary-goto-entry (button)
+  "Jump to the diary entry for the BUTTON at point.
+If the entry is a todo item, display its category properly.
+Overrides `diary-goto-entry'."
+  ;; Locate the diary item in its source file.
+  (let* ((locator (button-get button 'locator))
+        (file (cadr locator))
+        (date (regexp-quote (nth 2 locator)))
+        (content (regexp-quote (nth 3 locator))))
+    (if (not (and (file-exists-p file)
+                 (find-file-other-window file)))
+       (message "Unable to locate this diary entry")
+      (when (eq major-mode 'todo-mode) (widen))
+      (goto-char (point-min))
+      (when (re-search-forward (format "%s.*\\(%s\\)" date content) nil t)
+       (goto-char (match-beginning 1)))
+      ;; If it's a todo item, determine its category and display the
+      ;; category properly.
+      (when (eq major-mode 'todo-mode)
+       (let ((opoint (point)))
+         (re-search-backward (concat "^" (regexp-quote todo-category-beg)
+                                     "\\(.*\\)\n") nil t)
+         (todo-category-number (match-string 1))
+         (todo-category-select)
+         (goto-char opoint))))))
+
+(add-function :override diary-goto-entry-function #'todo-diary-goto-entry)
+
+(defun todo-done-item-p ()
+  "Return non-nil if item at point is a done item."
+  (save-excursion
+    (todo-item-start)
+    (looking-at todo-done-string-start)))
+
+(defun todo-done-item-section-p ()
+  "Return non-nil if point is in category's done items section."
+  (save-excursion
+    (or (re-search-backward (concat "^" (regexp-quote todo-category-done))
+                           nil t)
+       (progn (goto-char (point-min))
+              (looking-at todo-done-string-start)))))
+
+(defun todo-reset-done-separator (sep)
+  "Replace existing overlays of done items separator string SEP."
+  (save-excursion
+    (save-restriction
+      (widen)
+      (goto-char (point-min))
+      (while (re-search-forward
+             (concat "\n\\(" (regexp-quote todo-category-done) "\\)") nil t)
+       (let* ((beg (match-beginning 1))
+              (end (match-end 0))
+              (ov (progn (goto-char beg)
+                         (todo-get-overlay 'separator)))
+              (old-sep (when ov (overlay-get ov 'display)))
+              new-ov)
+         (when old-sep
+           (unless (string= old-sep sep)
+             (setq new-ov (make-overlay beg end))
+             (overlay-put new-ov 'todo 'separator)
+             (overlay-put new-ov 'display todo-done-separator)
+             (delete-overlay ov))))))))
+
+(defun todo-get-overlay (val)
+  "Return the overlay at point whose `todo' property has value VAL."
+  ;; Use overlays-in to find prefix overlays and check over two
+  ;; positions to find done separator overlay.
+  (let ((ovs (overlays-in (point) (1+ (point))))
+       ov)
+    (catch 'done
+      (while ovs
+       (setq ov (pop ovs))
+       (when (eq (overlay-get ov 'todo) val)
+         (throw 'done ov))))))
+
+(defun todo-marked-item-p ()
+  "Non-nil if this item begins with `todo-item-mark'.
+In that case, return the item's prefix overlay."
+  (let* ((ov (todo-get-overlay 'prefix))
+        ;; If an item insertion command is called on a todo file
+        ;; before it is visited, it has no prefix overlays yet, so
+        ;; check for this.
+        (pref (when ov (overlay-get ov 'before-string)))
+        (marked (when pref
+                  (string-match (concat "^" (regexp-quote todo-item-mark))
+                                pref))))
+    (when marked ov)))
+
+(defun todo-insert-with-overlays (item)
+  "Insert ITEM at point and update prefix/priority number overlays."
+  (todo-item-start)
+  ;; Insertion pushes item down but not its prefix overlay.  When the
+  ;; overlay includes a mark, this would now mark the inserted ITEM,
+  ;; so move it to the pushed down item.
+  (let ((ov (todo-get-overlay 'prefix))
+       (marked (todo-marked-item-p)))
+    (insert item "\n")
+    (when marked (move-overlay ov (point) (point))))
+  (todo-backward-item)
+  (todo-prefix-overlays))
+
+(defun todo-prefix-overlays ()
+  "Update the prefix overlays of the current category's items.
+The overlay's value is the string `todo-prefix' or with non-nil
+`todo-number-prefix' an integer in the sequence from 1 to
+the number of todo or done items in the category indicating the
+item's priority.  Todo and done items are numbered independently
+of each other."
+  (let ((num 0)
+       (cat-tp (or (cdr (assoc-string
+                         (todo-current-category)
+                         (nth 2 (assoc-string todo-current-todo-file
+                                              todo-top-priorities-overrides))))
+                   todo-top-priorities))
+       done prefix)
+    (save-excursion
+      (goto-char (point-min))
+      (while (not (eobp))
+       (when (or (todo-date-string-matcher (line-end-position))
+                 (todo-done-string-matcher (line-end-position)))
+         (goto-char (match-beginning 0))
+         (setq num (1+ num))
+         ;; Reset number to 1 for first done item.
+         (when (and (eq major-mode 'todo-mode)
+                    (looking-at todo-done-string-start)
+                    (looking-back (concat "^"
+                                          (regexp-quote todo-category-done)
+                                          "\n")))
+           (setq num 1
+                 done t))
+         (setq prefix (concat (propertize
+                               (if todo-number-prefix
+                                   (number-to-string num)
+                                 todo-prefix)
+                               'face
+                               ;; Prefix of top priority items has a
+                               ;; distinct face in Todo mode.
+                               (if (and (eq major-mode 'todo-mode)
+                                        (not done)
+                                        (<= num cat-tp))
+                                   'todo-top-priority
+                                 'todo-prefix-string))
+                              " "))
+         (let ((ov (todo-get-overlay 'prefix))
+               (marked (todo-marked-item-p)))
+           ;; Prefix overlay must be at a single position so its
+           ;; bounds aren't changed when (re)moving an item.
+           (unless ov (setq ov (make-overlay (point) (point))))
+           (overlay-put ov 'todo 'prefix)
+           (overlay-put ov 'before-string (if marked
+                                              (concat todo-item-mark prefix)
+                                            prefix))))
+       (forward-line)))))
+
+;; 
-----------------------------------------------------------------------------
+;;; Utilities for generating item insertion commands and key bindings
+;; 
-----------------------------------------------------------------------------
+
+;; Wolfgang Jenkner posted this powerset definition to emacs-devel
+;; (http://lists.gnu.org/archive/html/emacs-devel/2013-06/msg00423.html)
+;; and kindly gave me permission to use it.
+
+(defun todo-powerset (list)
+  "Return the powerset of LIST."
+  (let ((powerset (list nil)))
+    (dolist (elt list (mapcar 'reverse powerset))
+      (nconc powerset (mapcar (apply-partially 'cons elt) powerset)))))
+
+(defun todo-gen-arglists (arglist)
+  "Return list of lists of non-nil atoms produced from ARGLIST.
+The elements of ARGLIST may be atoms or lists."
+  (let (arglists)
+    (while arglist
+      (let ((arg (pop arglist)))
+       (cond ((symbolp arg)
+              (setq arglists (if arglists
+                                 (mapcar (lambda (l) (push arg l)) arglists)
+                               (list (push arg arglists)))))
+             ((listp arg)
+              (setq arglists
+                    (mapcar (lambda (a)
+                              (if (= 1 (length arglists))
+                                  (apply (lambda (l) (push a l)) arglists)
+                                (mapcar (lambda (l) (push a l)) arglists)))
+                            arg))))))
+    (setq arglists (mapcar 'reverse (apply 'append (mapc 'car arglists))))))
+
+(defvar todo-insertion-commands-args-genlist
+  '(diary nonmarking (calendar date dayname) time (here region))
+  "Generator list for argument lists of item insertion commands.")
+
+(defvar todo-insertion-commands-args
+  (let ((argslist (todo-gen-arglists todo-insertion-commands-args-genlist))
+       res new)
+    (setq res (cl-remove-duplicates
+              (apply 'append (mapcar 'todo-powerset argslist)) :test 'equal))
+    (dolist (l res)
+      (unless (= 5 (length l))
+       (let ((v (make-vector 5 nil)) elt)
+         (while l
+           (setq elt (pop l))
+           (cond ((eq elt 'diary)
+                  (aset v 0 elt))
+                 ((eq elt 'nonmarking)
+                  (aset v 1 elt))
+                 ((or (eq elt 'calendar)
+                      (eq elt 'date)
+                      (eq elt 'dayname))
+                  (aset v 2 elt))
+                 ((eq elt 'time)
+                  (aset v 3 elt))
+                 ((or (eq elt 'here)
+                      (eq elt 'region))
+                  (aset v 4 elt))))
+         (setq l (append v nil))))
+      (setq new (append new (list l))))
+    new)
+  "List of all argument lists for Todo mode item insertion commands.")
+
+(defun todo-insertion-command-name (arglist)
+  "Generate Todo mode item insertion command name from ARGLIST."
+  (replace-regexp-in-string
+   "-\\_>" ""
+   (replace-regexp-in-string
+    "-+" "-"
+    (concat "todo-insert-item-"
+           (mapconcat (lambda (e) (if e (symbol-name e))) arglist "-")))))
+
+(defvar todo-insertion-commands-names
+  (mapcar (lambda (l)
+          (todo-insertion-command-name l))
+         todo-insertion-commands-args)
+  "List of names of Todo mode item insertion commands.")
+
+(defmacro todo-define-insertion-command (&rest args)
+  "Generate Todo mode item insertion command definitions from ARGS."
+  (let ((name (intern (todo-insertion-command-name args)))
+       (arg0 (nth 0 args))
+       (arg1 (nth 1 args))
+       (arg2 (nth 2 args))
+       (arg3 (nth 3 args))
+       (arg4 (nth 4 args)))
+    `(defun ,name (&optional arg &rest args)
+       "Todo mode item insertion command generated from ARGS.
+For descriptions of the individual arguments, their values, and
+their relation to key bindings, see `todo-basic-insert-item'."
+       (interactive (list current-prefix-arg))
+       (todo-basic-insert-item arg ',arg0 ',arg1 ',arg2 ',arg3 ',arg4))))
+
+(defvar todo-insertion-commands
+  (mapcar (lambda (c)
+           (eval `(todo-define-insertion-command ,@c)))
+         todo-insertion-commands-args)
+  "List of Todo mode item insertion commands.")
+
+(defvar todo-insertion-commands-arg-key-list
+  '(("diary" "y" "yy")
+    ("nonmarking" "k" "kk")
+    ("calendar" "c" "cc")
+    ("date" "d" "dd")
+    ("dayname" "n" "nn")
+    ("time" "t" "tt")
+    ("here" "h" "h")
+    ("region" "r" "r"))
+  "List of mappings of item insertion command arguments to key sequences.")
+
+(defun todo-insertion-key-bindings (map)
+  "Generate key binding definitions for item insertion keymap MAP."
+  (dolist (c todo-insertion-commands)
+    (let* ((key "")
+          (cname (symbol-name c)))
+      (mapc (lambda (l)
+             (let ((arg (nth 0 l))
+                   (key1 (nth 1 l))
+                   (key2 (nth 2 l)))
+               (if (string-match (concat (regexp-quote arg) "\\_>") cname)
+                   (setq key (concat key key2)))
+               (if (string-match (concat (regexp-quote arg) ".+") cname)
+                   (setq key (concat key key1)))))
+           todo-insertion-commands-arg-key-list)
+      (if (string-match (concat (regexp-quote "todo-insert-item") "\\_>") 
cname)
+         (setq key (concat key "i")))
+      (define-key map key c))))
+
+;; 
-----------------------------------------------------------------------------
+;;; Todo minibuffer utilities
+;; 
-----------------------------------------------------------------------------
+
+(defcustom todo-y-with-space nil
+  "Non-nil means allow SPC to affirm a \"y or n\" question."
+  :type 'boolean
+  :group 'todo)
+
+(defun todo-y-or-n-p (prompt)
+  "Ask \"y or n\" question PROMPT and return t if answer is \"y\".
+Also return t if answer is \"Y\", but unlike `y-or-n-p', allow
+SPC to affirm the question only if option `todo-y-with-space' is
+non-nil."
+  (unless todo-y-with-space
+    (define-key query-replace-map " " 'ignore))
+  (prog1
+   (y-or-n-p prompt)
+   (define-key query-replace-map " " 'act)))
+
+(defun todo-category-completions (&optional archive)
+  "Return a list of completions for `todo-read-category'.
+Each element of the list is a cons of a category name and the
+file or list of files (as short file names) it is in.  The files
+are either the current (or if there is none, the default) todo
+file plus the files listed in `todo-category-completions-files',
+or, with non-nil ARCHIVE, the current archive file."
+  (let* ((curfile (or todo-current-todo-file
+                     (and todo-show-current-file
+                          todo-global-current-todo-file)
+                     (todo-absolute-file-name todo-default-todo-file)))
+        (files (or (unless archive
+                     (mapcar 'todo-absolute-file-name
+                             todo-category-completions-files))
+                   (list curfile)))
+        listall listf)
+    ;; If file was just added, it has no category completions.
+    (unless (zerop (buffer-size (find-buffer-visiting curfile)))
+      (unless (member curfile todo-archives)
+       (add-to-list 'files curfile))
+      (dolist (f files listall)
+       (with-current-buffer (find-file-noselect f 'nowarn)
+         ;; Ensure category is properly displayed in case user
+         ;; switches to file via a non-Todo mode command.  And if
+         ;; done items in category are visible, keep them visible.
+         (let ((done todo-show-with-done))
+           (when (> (buffer-size) (- (point-max) (point-min)))
+             (save-excursion
+               (goto-char (point-min))
+               (setq done (re-search-forward todo-done-string-start nil t))))
+           (let ((todo-show-with-done done))
+             (save-excursion (todo-category-select))))
+         (save-excursion
+           (save-restriction
+             (widen)
+             (goto-char (point-min))
+             (setq listf (read (buffer-substring-no-properties
+                                (line-beginning-position)
+                                (line-end-position)))))))
+       (mapc (lambda (elt) (let* ((cat (car elt))
+                                  (la-elt (assoc cat listall)))
+                             (if la-elt
+                                 (setcdr la-elt (append (list (cdr la-elt))
+                                                        (list f)))
+                               (push (cons cat f) listall))))
+             listf)))))
+
+(defun todo-read-file-name (prompt &optional archive mustmatch)
+  "Choose and return the name of a todo file, prompting with PROMPT.
+
+Show completions with TAB or SPC; the names are shown in short
+form but the absolute truename is returned.  With non-nil ARCHIVE
+return the absolute truename of a todo archive file.  With non-nil
+MUSTMATCH the name of an existing file must be chosen;
+otherwise, a new file name is allowed."
+  (let* ((completion-ignore-case todo-completion-ignore-case)
+        (files (mapcar 'todo-short-file-name
+                       (if archive todo-archives todo-files)))
+        (file (completing-read prompt files nil mustmatch nil nil
+                               (if files
+                                   ;; If user hit RET without
+                                   ;; choosing a file, default to
+                                   ;; current or default file.
+                                   (todo-short-file-name
+                                    (or todo-current-todo-file
+                                        (and todo-show-current-file
+                                             todo-global-current-todo-file)
+                                        (todo-absolute-file-name
+                                         todo-default-todo-file)))
+                                 ;; Trigger prompt for initial file.
+                                 ""))))
+    (unless (file-exists-p todo-directory)
+      (make-directory todo-directory))
+    (unless mustmatch
+      (setq file (todo-validate-name file 'file)))
+    (setq file (file-truename (concat todo-directory file
+                                     (if archive ".toda" ".todo"))))))
+
+(defun todo-read-category (prompt &optional match-type file)
+  "Choose and return a category name, prompting with PROMPT.
+Show completions for existing categories with TAB or SPC.
+
+The argument MATCH-TYPE specifies the matching requirements on
+the category name: with the value `todo' or `archive' the name
+must complete to that of an existing todo or archive category,
+respectively; with the value `add' the name must not be that of
+an existing category; with all other values both existing and new
+valid category names are accepted.
+
+With non-nil argument FILE prompt for a file and complete only
+against categories in that file; otherwise complete against all
+categories from `todo-category-completions-files'."
+  ;; Allow SPC to insert spaces, for adding new category names.
+  (let ((map minibuffer-local-completion-map))
+    (define-key map " " nil)
+    (let* ((add (eq match-type 'add))
+          (archive (eq match-type 'archive))
+          (file0 (when (and file (> (length todo-files) 1))
+                   (todo-read-file-name (concat "Choose a" (if archive
+                                                                "n archive"
+                                                              " todo")
+                                                 " file: ") archive t)))
+          (completions (unless file0 (todo-category-completions archive)))
+          (categories (cond (file0
+                             (with-current-buffer
+                                 (find-file-noselect file0 'nowarn)
+                               (let ((todo-current-todo-file file0))
+                                 todo-categories)))
+                            ((and add (not file))
+                             (with-current-buffer
+                                 (find-file-noselect todo-current-todo-file)
+                               todo-categories))
+                            (t
+                             completions)))
+          (completion-ignore-case todo-completion-ignore-case)
+          (cat (completing-read prompt categories nil
+                                (eq match-type 'todo) nil nil
+                                ;; Unless we're adding a category via
+                                ;; todo-add-category, set default
+                                ;; for existing categories to the
+                                ;; current category of the chosen
+                                ;; file or else of the current file.
+                                (if (and categories (not add))
+                                    (with-current-buffer
+                                        (find-file-noselect
+                                         (or file0
+                                             todo-current-todo-file
+                                             (todo-absolute-file-name
+                                              todo-default-todo-file)))
+                                      (todo-current-category))
+                                  ;; Trigger prompt for initial category.
+                                  "")))
+          (catfil (cdr (assoc cat completions)))
+          (str "Category \"%s\" from which file (TAB for choices)? "))
+      ;; If we do category completion and the chosen category name
+      ;; occurs in more than one file, prompt to choose one file.
+      (unless (or file0 add (not catfil))
+       (setq file0 (file-truename
+                    (if (atom catfil)
+                        catfil
+                      (todo-absolute-file-name
+                       (let ((files (mapcar 'todo-short-file-name catfil)))
+                         (completing-read (format str cat) files)))))))
+      ;; Default to the current file.
+      (unless file0 (setq file0 todo-current-todo-file))
+      ;; First validate only a name passed interactively from
+      ;; todo-add-category, which must be of a nonexisting category.
+      (unless (and (assoc cat categories) (not add))
+       ;; Validate only against completion categories.
+       (let ((todo-categories categories))
+         (setq cat (todo-validate-name cat 'category)))
+       ;; When user enters a nonexisting category name by jumping or
+       ;; moving, confirm that it should be added, then validate.
+       (unless add
+         (if (todo-y-or-n-p (format "Add new category \"%s\" to file \"%s\"? "
+                               cat (todo-short-file-name file0)))
+             (progn
+               (when (assoc cat categories)
+                 (let ((todo-categories categories))
+                   (setq cat (todo-validate-name cat 'category))))
+               ;; Restore point and narrowing after adding new
+               ;; category, to avoid moving to beginning of file when
+               ;; moving marked items to a new category
+               ;; (todo-move-item).
+               (save-excursion
+                 (save-restriction
+                   (todo-add-category file0 cat))))
+           ;; If we decide not to add a category, exit without returning.
+           (keyboard-quit))))
+      (cons cat file0))))
+
+(defun todo-validate-name (name type)
+  "Prompt for new NAME for TYPE until it is valid, then return it.
+TYPE can be either of the symbols `file' or `category'."
+  (let ((categories todo-categories)
+       (files (mapcar 'todo-short-file-name todo-files))
+       prompt)
+    (while
+       (and
+        (cond ((string= "" name)
+               (setq prompt
+                     (cond ((eq type 'file)
+                            (if files
+                                "Enter a non-empty file name: "
+                              ;; Empty string passed by todo-show to
+                              ;; prompt for initial todo file.
+                              (concat "Initial file name ["
+                                      todo-initial-file "]: ")))
+                           ((eq type 'category)
+                            (if categories
+                                "Enter a non-empty category name: "
+                              ;; Empty string passed by todo-show to
+                              ;; prompt for initial category of a new
+                              ;; todo file.
+                              (concat "Initial category name ["
+                                      todo-initial-category "]: "))))))
+              ((string-match "\\`\\s-+\\'" name)
+               (setq prompt
+                     "Enter a name that does not contain only white space: "))
+              ((and (eq type 'file) (member name files))
+               (setq prompt "Enter a non-existing file name: "))
+              ((and (eq type 'category) (assoc name categories))
+               (setq prompt "Enter a non-existing category name: ")))
+        (setq name (if (or (and (eq type 'file) files)
+                           (and (eq type 'category) categories))
+                       (completing-read prompt (cond ((eq type 'file)
+                                                      files)
+                                                     ((eq type 'category)
+                                                      categories)))
+                     ;; Offer default initial name.
+                     (completing-read prompt (if (eq type 'file)
+                                                 files
+                                               categories)
+                                      nil nil (if (eq type 'file)
+                                                  todo-initial-file
+                                                todo-initial-category))))))
+    name))
+
+;; Adapted from calendar-read-date and calendar-date-string.
+(defun todo-read-date (&optional arg mo yr)
+  "Prompt for Gregorian date and return it in the current format.
+
+With non-nil ARG, prompt for and return only the date component
+specified by ARG, which can be one of these symbols:
+`month' (prompt for name, return name or number according to
+value of `calendar-date-display-form'), `day' of month, or
+`year'.  The value of each of these components can be `*',
+indicating an unspecified month, day, or year.
+
+When ARG is `day', non-nil arguments MO and YR determine the
+number of the last the day of the month."
+  (let (year monthname month day
+            dayname)                   ; Needed by calendar-date-display-form.
+    (when (or (not arg) (eq arg 'year))
+      (while (if (natnump year) (< year 1) (not (eq year '*)))
+       (setq year (read-from-minibuffer
+                   "Year (>0 or RET for this year or * for any year): "
+                   nil nil t nil (number-to-string
+                                  (calendar-extract-year
+                                   (calendar-current-date)))))))
+    (when (or (not arg) (eq arg 'month))
+      (let* ((marray todo-month-name-array)
+            (mlist (append marray nil))
+            (mabarray todo-month-abbrev-array)
+            (mablist (append mabarray nil))
+            (completion-ignore-case todo-completion-ignore-case))
+       (setq monthname (completing-read
+                        "Month name (RET for current month, * for any month): "
+                        mlist nil t nil nil
+                        (calendar-month-name (calendar-extract-month
+                                              (calendar-current-date)) t))
+             month (1+ (- (length mlist)
+                          (length (or (member monthname mlist)
+                                      (member monthname mablist))))))
+       (setq monthname (aref mabarray (1- month)))))
+    (when (or (not arg) (eq arg 'day))
+      (let ((last (let ((mm (or month mo))
+                       (yy (or year yr)))
+                   ;; If month is unspecified, use a month with 31
+                   ;; days for checking day of month input.  Does
+                   ;; Calendar do anything special when * is
+                   ;; currently a shorter month?
+                   (if (= mm 13) (setq mm 1))
+                   ;; If year is unspecified, use a leap year to
+                   ;; allow Feb. 29.
+                   (if (eq year '*) (setq yy 2012))
+                   (calendar-last-day-of-month mm yy))))
+       (while (if (natnump day) (or (< day 1) (> day last)) (not (eq day '*)))
+         (setq day (read-from-minibuffer
+                    (format "Day (1-%d or RET for today or * for any day): "
+                            last)
+                    nil nil t nil (number-to-string
+                                   (calendar-extract-day
+                                    (calendar-current-date))))))))
+    ;; Stringify read values (monthname is already a string).
+    (and year (setq year (if (eq year '*)
+                            (symbol-name '*)
+                          (number-to-string year))))
+    (and day (setq day (if (eq day '*)
+                          (symbol-name '*)
+                        (number-to-string day))))
+    (and month (setq month (if (eq month '*)
+                              (symbol-name '*)
+                            (number-to-string month))))
+    (if arg
+       (cond ((eq arg 'year) year)
+             ((eq arg 'day) day)
+             ((eq arg 'month)
+              (if (memq 'month calendar-date-display-form)
+                  month
+                monthname)))
+      (mapconcat 'eval calendar-date-display-form ""))))
+
+(defun todo-read-dayname ()
+  "Choose name of a day of the week with completion and return it."
+  (let ((completion-ignore-case todo-completion-ignore-case))
+    (completing-read "Enter a day name: "
+                    (append calendar-day-name-array nil)
+                    nil t)))
+  
+(defun todo-read-time ()
+  "Prompt for and return a valid clock time as a string.
+
+Valid time strings are those matching `diary-time-regexp'.
+Typing `<return>' at the prompt returns the current time, if the
+user option `todo-always-add-time-string' is non-nil, otherwise
+the empty string (i.e., no time string)."
+  (let (valid answer)
+    (while (not valid)
+      (setq answer (read-string "Enter a clock time: " nil nil
+                               (when todo-always-add-time-string
+                                 (substring (current-time-string) 11 16))))
+      (when (or (string= "" answer)
+               (string-match diary-time-regexp answer))
+       (setq valid t)))
+    answer))
+
+;; 
-----------------------------------------------------------------------------
+;;; Customization groups and utilities
+;; 
-----------------------------------------------------------------------------
+
+(defgroup todo nil
+  "Create and maintain categorized lists of todo items."
+  :link '(emacs-commentary-link "todo")
+  :version "24.4"
+  :group 'calendar)
+
+(defgroup todo-edit nil
+  "User options for adding and editing todo items."
+  :version "24.4"
+  :group 'todo)
+
+(defgroup todo-categories nil
+  "User options for Todo Categories mode."
+  :version "24.4"
+  :group 'todo)
+
+(defgroup todo-filtered nil
+  "User options for Todo Filter Items mode."
+  :version "24.4"
+  :group 'todo)
+
+(defgroup todo-display nil
+  "User display options for Todo mode."
+  :version "24.4"
+  :group 'todo)
+
+(defgroup todo-faces nil
+  "Faces for the Todo modes."
+  :version "24.4"
+  :group 'todo)
+
+(defun todo-set-show-current-file (symbol value)
+  "The :set function for user option `todo-show-current-file'."
+  (custom-set-default symbol value)
+  (if value
+      (add-hook 'pre-command-hook 'todo-show-current-file nil t)
+    (remove-hook 'pre-command-hook 'todo-show-current-file t)))
+
+(defun todo-reset-prefix (symbol value)
+  "The :set function for `todo-prefix' and `todo-number-prefix'."
+  (let ((oldvalue (symbol-value symbol))
+       (files todo-file-buffers))
+    (custom-set-default symbol value)
+    (when (not (equal value oldvalue))
+      (dolist (f files)
+       (with-current-buffer (find-file-noselect f)
+         ;; Activate the new setting in the current category.
+         (save-excursion (todo-category-select)))))))
+
+(defun todo-reset-nondiary-marker (symbol value)
+  "The :set function for user option `todo-nondiary-marker'."
+  (let ((oldvalue (symbol-value symbol))
+       (files (append todo-files todo-archives)))
+    (custom-set-default symbol value)
+    ;; Need to reset these to get font-locking right.
+    (setq todo-nondiary-start (nth 0 todo-nondiary-marker)
+         todo-nondiary-end (nth 1 todo-nondiary-marker)
+         todo-date-string-start
+         ;; See comment in defvar of `todo-date-string-start'.
+         (concat "^\\(" (regexp-quote todo-nondiary-start) "\\|"
+                 (regexp-quote diary-nonmarking-symbol) "\\)?"))
+    (when (not (equal value oldvalue))
+      (dolist (f files)
+       (with-current-buffer (find-file-noselect f)
+         (let (buffer-read-only)
+           (widen)
+           (goto-char (point-min))
+           (while (not (eobp))
+             (if (re-search-forward
+                  (concat "^\\(" todo-done-string-start "[^][]+] \\)?"
+                          "\\(?1:" (regexp-quote (car oldvalue))
+                          "\\)" todo-date-pattern "\\( "
+                          diary-time-regexp "\\)?\\(?2:"
+                          (regexp-quote (cadr oldvalue)) "\\)")
+                  nil t)
+                 (progn
+                   (replace-match (nth 0 value) t t nil 1)
+                   (replace-match (nth 1 value) t t nil 2))
+               (forward-line)))
+           (todo-category-select)))))))
+
+(defun todo-reset-done-separator-string (symbol value)
+  "The :set function for `todo-done-separator-string'."
+  (let ((oldvalue (symbol-value symbol))
+       (files todo-file-buffers)
+       (sep todo-done-separator))
+    (custom-set-default symbol value)
+    (when (not (equal value oldvalue))
+      (dolist (f files)
+       (with-current-buffer (find-file-noselect f)
+         (let (buffer-read-only)
+           (setq todo-done-separator (todo-done-separator))
+           (when (= 1 (length value))
+             (todo-reset-done-separator sep)))
+         (todo-category-select))))))
+
+(defun todo-reset-done-string (symbol value)
+  "The :set function for user option `todo-done-string'."
+  (let ((oldvalue (symbol-value symbol))
+       (files (append todo-files todo-archives)))
+    (custom-set-default symbol value)
+    ;; Need to reset this to get font-locking right.
+    (setq todo-done-string-start
+         (concat "^\\[" (regexp-quote todo-done-string)))
+    (when (not (equal value oldvalue))
+      (dolist (f files)
+       (with-current-buffer (find-file-noselect f)
+         (let (buffer-read-only)
+           (widen)
+           (goto-char (point-min))
+           (while (not (eobp))
+             (if (re-search-forward
+                  (concat "^" (regexp-quote todo-nondiary-start)
+                          "\\(" (regexp-quote oldvalue) "\\)")
+                  nil t)
+                 (replace-match value t t nil 1)
+               (forward-line)))
+           (todo-category-select)))))))
+
+(defun todo-reset-comment-string (symbol value)
+  "The :set function for user option `todo-comment-string'."
+  (let ((oldvalue (symbol-value symbol))
+       (files (append todo-files todo-archives)))
+    (custom-set-default symbol value)
+    (when (not (equal value oldvalue))
+      (dolist (f files)
+       (with-current-buffer (find-file-noselect f)
+         (let (buffer-read-only)
+           (save-excursion
+             (widen)
+             (goto-char (point-min))
+             (while (not (eobp))
+               (if (re-search-forward
+                    (concat
+                            "\\[\\(" (regexp-quote oldvalue) "\\): [^]]*\\]")
+                    nil t)
+                   (replace-match value t t nil 1)
+                 (forward-line)))
+             (todo-category-select))))))))
+
+(defun todo-reset-highlight-item (symbol value)
+  "The :set function for `todo-toggle-item-highlighting'."
+  (let ((oldvalue (symbol-value symbol))
+       (files (append todo-files todo-archives)))
+    (custom-set-default symbol value)
+    (when (not (equal value oldvalue))
+      (dolist (f files)
+       (let ((buf (find-buffer-visiting f)))
+         (when buf
+           (with-current-buffer buf
+             (require 'hl-line)
+             (if value
+                 (hl-line-mode 1)
+               (hl-line-mode -1)))))))))
+
+(defun todo-reevaluate-filelist-defcustoms ()
+  "Reevaluate defcustoms that provide choice list of todo files."
+  (custom-set-default 'todo-default-todo-file
+                     (symbol-value 'todo-default-todo-file))
+  (todo-reevaluate-default-file-defcustom)
+  (custom-set-default 'todo-filter-files (symbol-value 'todo-filter-files))
+  (todo-reevaluate-filter-files-defcustom)
+  (custom-set-default 'todo-category-completions-files
+                     (symbol-value 'todo-category-completions-files))
+  (todo-reevaluate-category-completions-files-defcustom))
+
+(defun todo-reevaluate-default-file-defcustom ()
+  "Reevaluate defcustom of `todo-default-todo-file'.
+Called after adding or deleting a todo file."
+  (eval (defcustom todo-default-todo-file (car (funcall todo-files-function))
+         "Todo file visited by first session invocation of `todo-show'."
+         :type `(radio ,@(mapcar (lambda (f) (list 'const f))
+                                 (mapcar 'todo-short-file-name
+                                         (funcall todo-files-function))))
+         :group 'todo)))
+
+(defun todo-reevaluate-category-completions-files-defcustom ()
+  "Reevaluate defcustom of `todo-category-completions-files'.
+Called after adding or deleting a todo file."
+  (eval (defcustom todo-category-completions-files nil
+  "List of files for building `todo-read-category' completions."
+         :type `(set ,@(mapcar (lambda (f) (list 'const f))
+                               (mapcar 'todo-short-file-name
+                                       (funcall todo-files-function))))
+         :group 'todo)))
+
+(defun todo-reevaluate-filter-files-defcustom ()
+  "Reevaluate defcustom of `todo-filter-files'.
+Called after adding or deleting a todo file."
+  (eval (defcustom todo-filter-files nil
+         "List of files for multifile item filtering."
+         :type `(set ,@(mapcar (lambda (f) (list 'const f))
+                               (mapcar 'todo-short-file-name
+                                       (funcall todo-files-function))))
+         :group 'todo)))
+
+;; 
-----------------------------------------------------------------------------
+;;; Font locking
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-nondiary-marker-matcher (lim)
+  "Search for todo item nondiary markers within LIM for font-locking."
+  (re-search-forward (concat "^\\(?1:" (regexp-quote todo-nondiary-start) "\\)"
+                            todo-date-pattern "\\(?: " diary-time-regexp
+                            "\\)?\\(?2:" (regexp-quote todo-nondiary-end) 
"\\)")
+                    lim t))
+
+(defun todo-diary-nonmarking-matcher (lim)
+  "Search for diary nonmarking symbol within LIM for font-locking."
+  (re-search-forward (concat "^\\(?1:" (regexp-quote diary-nonmarking-symbol)
+                            "\\)" todo-date-pattern) lim t))
+
+(defun todo-date-string-matcher (lim)
+  "Search for todo item date string within LIM for font-locking."
+  (re-search-forward
+   (concat todo-date-string-start "\\(?1:" todo-date-pattern "\\)") lim t))
+
+(defun todo-time-string-matcher (lim)
+  "Search for todo item time string within LIM for font-locking."
+  (re-search-forward (concat todo-date-string-start todo-date-pattern
+                            " \\(?1:" diary-time-regexp "\\)") lim t))
+
+(defun todo-diary-expired-matcher (lim)
+  "Search for expired diary item date within LIM for font-locking."
+  (when (re-search-forward (concat "^\\(?:"
+                                  (regexp-quote diary-nonmarking-symbol)
+                                  "\\)?\\(?1:" todo-date-pattern "\\) \\(?2:"
+                                  diary-time-regexp "\\)?") lim t)
+    (let* ((date (match-string-no-properties 1))
+          (time (match-string-no-properties 2))
+          ;; Function days-between requires a non-empty time string.
+          (date-time (concat date " " (or time "00:00"))))
+      (or (and (not (string-match ".+day\\|\\*" date))
+              (< (days-between date-time (current-time-string)) 0))
+         (todo-diary-expired-matcher lim)))))
+
+(defun todo-done-string-matcher (lim)
+  "Search for done todo item header within LIM for font-locking."
+  (re-search-forward (concat todo-done-string-start
+                     "[^][]+]")
+                    lim t))
+
+(defun todo-comment-string-matcher (lim)
+  "Search for done todo item comment within LIM for font-locking."
+  (re-search-forward (concat "\\[\\(?1:" todo-comment-string "\\):")
+                    lim t))
+
+(defun todo-category-string-matcher-1 (lim)
+  "Search for todo category name within LIM for font-locking.
+This is for fontifying category and file names appearing in Todo
+Filtered Items mode following done items."
+  (if (eq major-mode 'todo-filtered-items-mode)
+      (re-search-forward (concat todo-done-string-start todo-date-pattern
+                                "\\(?: " diary-time-regexp
+                                ;; Use non-greedy operator to prevent
+                                ;; capturing possible following non-diary
+                                ;; date string.
+                                "\\)?] \\(?1:\\[.+?\\]\\)")
+                        lim t)))
+
+(defun todo-category-string-matcher-2 (lim)
+  "Search for todo category name within LIM for font-locking.
+This is for fontifying category and file names appearing in Todo
+Filtered Items mode following todo (not done) items."
+  (if (eq major-mode 'todo-filtered-items-mode)
+      (re-search-forward (concat todo-date-string-start todo-date-pattern
+                                "\\(?: " diary-time-regexp "\\)?\\(?:"
+                                (regexp-quote todo-nondiary-end)
+                                "\\)? \\(?1:\\[.+\\]\\)")
+                        lim t)))
+
+(defvar todo-nondiary-face 'todo-nondiary)
+(defvar todo-date-face 'todo-date)
+(defvar todo-time-face 'todo-time)
+(defvar todo-diary-expired-face 'todo-diary-expired)
+(defvar todo-done-sep-face 'todo-done-sep)
+(defvar todo-done-face 'todo-done)
+(defvar todo-comment-face 'todo-comment)
+(defvar todo-category-string-face 'todo-category-string)
+(defvar todo-font-lock-keywords
+  (list
+   '(todo-nondiary-marker-matcher 1 todo-nondiary-face t)
+   '(todo-nondiary-marker-matcher 2 todo-nondiary-face t)
+   ;; diary-lib.el uses font-lock-constant-face for diary-nonmarking-symbol.
+   '(todo-diary-nonmarking-matcher 1 font-lock-constant-face t)
+   '(todo-date-string-matcher 1 todo-date-face t)
+   '(todo-time-string-matcher 1 todo-time-face t)
+   '(todo-done-string-matcher 0 todo-done-face t)
+   '(todo-comment-string-matcher 1 todo-comment-face t)
+   '(todo-category-string-matcher-1 1 todo-category-string-face t t)
+   '(todo-category-string-matcher-2 1 todo-category-string-face t t)
+   '(todo-diary-expired-matcher 1 todo-diary-expired-face t)
+   '(todo-diary-expired-matcher 2 todo-diary-expired-face t t)
+   )
+  "Font-locking for Todo modes.")
+
+;; 
-----------------------------------------------------------------------------
+;;; Key binding
+;; 
-----------------------------------------------------------------------------
+
+(defvar todo-insertion-map
+  (let ((map (make-keymap)))
+    (todo-insertion-key-bindings map)
+    (define-key map "p" 'todo-copy-item)
+    map)
+  "Keymap for Todo mode item insertion commands.")
+
+(defvar todo-key-bindings-t
+  `(
+    ("Af"           todo-find-archive)
+    ("Ac"           todo-choose-archive)
+    ("Ad"           todo-archive-done-item)
+    ("Cv"           todo-toggle-view-done-items)
+    ("v"            todo-toggle-view-done-items)
+    ("Ca"           todo-add-category)
+    ("Cr"           todo-rename-category)
+    ("Cg"           todo-merge-category)
+    ("Cm"           todo-move-category)
+    ("Ck"           todo-delete-category)
+    ("Cts"          todo-set-top-priorities-in-category)
+    ("Cey"          todo-edit-category-diary-inclusion)
+    ("Cek"          todo-edit-category-diary-nonmarking)
+    ("Fa"           todo-add-file)
+    ("Ff"           todo-find-filtered-items-file)
+    ("FV"           todo-toggle-view-done-only)
+    ("V"            todo-toggle-view-done-only)
+    ("Ftt"          todo-filter-top-priorities)
+    ("Ftm"          todo-filter-top-priorities-multifile)
+    ("Fts"          todo-set-top-priorities-in-file)
+    ("Fyy"          todo-filter-diary-items)
+    ("Fym"          todo-filter-diary-items-multifile)
+    ("Frr"          todo-filter-regexp-items)
+    ("Frm"          todo-filter-regexp-items-multifile)
+    ("ee"           todo-edit-item)
+    ("em"           todo-edit-multiline-item)
+    ("edt"          todo-edit-item-header)
+    ("edc"          todo-edit-item-date-from-calendar)
+    ("eda"          todo-edit-item-date-to-today)
+    ("edn"          todo-edit-item-date-day-name)
+    ("edy"          todo-edit-item-date-year)
+    ("edm"          todo-edit-item-date-month)
+    ("edd"          todo-edit-item-date-day)
+    ("et"           todo-edit-item-time)
+    ("eyy"          todo-edit-item-diary-inclusion)
+    ("eyk"          todo-edit-item-diary-nonmarking)
+    ("ec"           todo-edit-done-item-comment)
+    ("d"            todo-item-done)
+    ("i"            ,todo-insertion-map)
+    ("k"            todo-delete-item)
+    ("m"            todo-move-item)
+    ("u"            todo-item-undone)
+    ([remap newline] newline-and-indent)
+   )
+  "List of key bindings for Todo mode only.")
+
+(defvar todo-key-bindings-t+a+f
+  `(
+    ("C*" todo-mark-category)
+    ("Cu" todo-unmark-category)
+    ("Fh" todo-toggle-item-header)
+    ("h"  todo-toggle-item-header)
+    ("Fe" todo-edit-file)
+    ("FH" todo-toggle-item-highlighting)
+    ("H"  todo-toggle-item-highlighting)
+    ("FN" todo-toggle-prefix-numbers)
+    ("N"  todo-toggle-prefix-numbers)
+    ("PB" todo-print-buffer)
+    ("PF" todo-print-buffer-to-file)
+    ("b"  todo-backward-category)
+    ("d"  todo-item-done)
+    ("f"  todo-forward-category)
+    ("j"  todo-jump-to-category)
+    ("n"  todo-next-item)
+    ("p"  todo-previous-item)
+    ("q"  todo-quit)
+    ("s"  todo-save)
+    ("t"  todo-show)
+   )
+  "List of key bindings for Todo, Archive, and Filtered Items modes.")
+
+(defvar todo-key-bindings-t+a
+  `(
+    ("Fc" todo-show-categories-table)
+    ("S"  todo-search)
+    ("X"  todo-clear-matches)
+    ("*"  todo-toggle-mark-item)
+   )
+  "List of key bindings for Todo and Todo Archive modes.")
+
+(defvar todo-key-bindings-t+f
+  `(
+    ("l" todo-lower-item-priority)
+    ("r" todo-raise-item-priority)
+    ("#" todo-set-item-priority)
+   )
+  "List of key bindings for Todo and Todo Filtered Items modes.")
+
+(defvar todo-mode-map
+  (let ((map (make-keymap)))
+    ;; Don't suppress digit keys, so they can supply prefix arguments.
+    (suppress-keymap map)
+    (dolist (kb todo-key-bindings-t)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (dolist (kb todo-key-bindings-t+a+f)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (dolist (kb todo-key-bindings-t+a)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (dolist (kb todo-key-bindings-t+f)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    map)
+  "Todo mode keymap.")
+
+(defvar todo-archive-mode-map
+  (let ((map (make-sparse-keymap)))
+    (suppress-keymap map)
+    (dolist (kb todo-key-bindings-t+a+f)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (dolist (kb todo-key-bindings-t+a)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (define-key map "a" 'todo-jump-to-archive-category)
+    (define-key map "u" 'todo-unarchive-items)
+    map)
+  "Todo Archive mode keymap.")
+
+(defvar todo-edit-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "\C-x\C-q" 'todo-edit-quit)
+    (define-key map [remap newline] 'newline-and-indent)
+    map)
+  "Todo Edit mode keymap.")
+
+(defvar todo-categories-mode-map
+  (let ((map (make-sparse-keymap)))
+    (suppress-keymap map)
+    (define-key map "c" 'todo-sort-categories-alphabetically-or-numerically)
+    (define-key map "t" 'todo-sort-categories-by-todo)
+    (define-key map "y" 'todo-sort-categories-by-diary)
+    (define-key map "d" 'todo-sort-categories-by-done)
+    (define-key map "a" 'todo-sort-categories-by-archived)
+    (define-key map "#" 'todo-set-category-number)
+    (define-key map "l" 'todo-lower-category)
+    (define-key map "r" 'todo-raise-category)
+    (define-key map "n" 'todo-next-button)
+    (define-key map "p" 'todo-previous-button)
+    (define-key map [tab] 'todo-next-button)
+    (define-key map [backtab] 'todo-previous-button)
+    (define-key map "q" 'todo-quit)
+    map)
+  "Todo Categories mode keymap.")
+
+(defvar todo-filtered-items-mode-map
+  (let ((map (make-sparse-keymap)))
+    (suppress-keymap map)
+    (dolist (kb todo-key-bindings-t+a+f)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (dolist (kb todo-key-bindings-t+f)
+      (define-key map (nth 0 kb) (nth 1 kb)))
+    (define-key map "g" 'todo-go-to-source-item)
+    (define-key map [remap newline] 'todo-go-to-source-item)
+    map)
+  "Todo Filtered Items mode keymap.")
+
+;; FIXME: Is it worth having a menu and if so, which commands?
+;; (easy-menu-define
+;;   todo-menu todo-mode-map "Todo Menu"
+;;   '("Todo"
+;;     ("Navigation"
+;;      ["Next Item"            todo-forward-item t]
+;;      ["Previous Item"        todo-backward-item t]
+;;      "---"
+;;      ["Next Category"        todo-forward-category t]
+;;      ["Previous Category"    todo-backward-category t]
+;;      ["Jump to Category"     todo-jump-to-category t]
+;;      "---"
+;;      ["Search Todo File"    todo-search t]
+;;      ["Clear Highlighting on Search Matches" todo-category-done t])
+;;     ("Display"
+;;      ["List Current Categories" todo-show-categories-table t]
+;;      ;; ["List Categories Alphabetically" 
todo-display-categories-alphabetically t]
+;;      ["Turn Item Highlighting on/off" todo-toggle-item-highlighting t]
+;;      ["Turn Item Numbering on/off" todo-toggle-prefix-numbers t]
+;;      ["Turn Item Time Stamp on/off" todo-toggle-item-header t]
+;;      ["View/Hide Done Items" todo-toggle-view-done-items t]
+;;      "---"
+;;      ["View Diary Items" todo-filter-diary-items t]
+;;      ["View Top Priority Items" todo-filter-top-priorities t]
+;;      ["View Multifile Top Priority Items" 
todo-filter-top-priorities-multifile t]
+;;      "---"
+;;      ["Print Category"     todo-print-buffer t])
+;;     ("Editing"
+;;      ["Insert New Item"      todo-insert-item t]
+;;      ["Insert Item Here"     todo-insert-item-here t]
+;;      ("More Insertion Commands")
+;;      ["Edit Item"            todo-edit-item t]
+;;      ["Edit Multiline Item"  todo-edit-multiline-item t]
+;;      ["Edit Item Header"     todo-edit-item-header t]
+;;      ["Edit Item Date"       todo-edit-item-date t]
+;;      ["Edit Item Time"       todo-edit-item-time t]
+;;      "---"
+;;      ["Lower Item Priority"  todo-lower-item-priority t]
+;;      ["Raise Item Priority"  todo-raise-item-priority t]
+;;      ["Set Item Priority" todo-set-item-priority t]
+;;      ["Move (Recategorize) Item" todo-move-item t]
+;;      ["Delete Item"          todo-delete-item t]
+;;      ["Undo Done Item" todo-item-undone t]
+;;      ["Mark/Unmark Item for Diary" todo-toggle-item-diary-inclusion t]
+;;      ["Mark/Unmark Items for Diary" todo-edit-item-diary-inclusion t]
+;;      ["Mark & Hide Done Item" todo-item-done t]
+;;      ["Archive Done Items" todo-archive-category-done-items t]
+;;      "---"
+;;      ["Add New Todo File" todo-add-file t]
+;;      ["Add New Category" todo-add-category t]
+;;      ["Delete Current Category" todo-delete-category t]
+;;      ["Rename Current Category" todo-rename-category t]
+;;      "---"
+;;      ["Save Todo File"      todo-save t]
+;;      )
+;;     "---"
+;;     ["Quit"                 todo-quit t]
+;;     ))
+
+;; 
-----------------------------------------------------------------------------
+;;; Hook functions and mode definitions 
+;; 
-----------------------------------------------------------------------------
+
+(defun todo-show-current-file ()
+  "Visit current instead of default todo file with `todo-show'.
+This function is added to `pre-command-hook' when user option
+`todo-show-current-file' is set to non-nil."
+  (setq todo-global-current-todo-file todo-current-todo-file))
+
+(defun todo-display-as-todo-file ()
+  "Show todo files correctly when visited from outside of Todo mode."
+  (and (member this-command todo-visit-files-commands)
+       (= (- (point-max) (point-min)) (buffer-size))
+       (member major-mode '(todo-mode todo-archive-mode))
+       (todo-category-select)))
+
+(defun todo-add-to-buffer-list ()
+  "Add name of just visited todo file to `todo-file-buffers'.
+This function is added to `find-file-hook' in Todo mode."
+  (let ((filename (file-truename (buffer-file-name))))
+    (when (member filename todo-files)
+      (add-to-list 'todo-file-buffers filename))))
+
+(defun todo-update-buffer-list ()
+  "Make current Todo mode buffer file car of `todo-file-buffers'.
+This function is added to `post-command-hook' in Todo mode."
+  (let ((filename (file-truename (buffer-file-name))))
+    (unless (eq (car todo-file-buffers) filename)
+      (setq todo-file-buffers
+           (cons filename (delete filename todo-file-buffers))))))
+
+(defun todo-reset-global-current-todo-file ()
+  "Update the value of `todo-global-current-todo-file'.
+This becomes the latest existing todo file or, if there is none,
+the value of `todo-default-todo-file'.
+This function is added to `kill-buffer-hook' in Todo mode."
+  (let ((filename (file-truename (buffer-file-name))))
+    (setq todo-file-buffers (delete filename todo-file-buffers))
+    (setq todo-global-current-todo-file
+         (or (car todo-file-buffers)
+             (todo-absolute-file-name todo-default-todo-file)))))
+
+(defun todo-reset-and-enable-done-separator ()
+  "Show resized done items separator overlay after window change.
+Added to `window-configuration-change-hook' in `todo-mode'."
+  (when (= 1 (length todo-done-separator-string))
+    (let ((sep todo-done-separator))
+      (setq todo-done-separator (todo-done-separator))
+      (save-match-data (todo-reset-done-separator sep)))))
+
+(defun todo-modes-set-1 ()
+  "Make some settings that apply to multiple Todo modes."
+  (setq-local font-lock-defaults '(todo-font-lock-keywords t))
+  (setq-local tab-width todo-indent-to-here)
+  (setq-local indent-line-function 'todo-indent)
+  (when todo-wrap-lines
+    (visual-line-mode)
+    (setq wrap-prefix (make-string todo-indent-to-here 32))))
+
+(defun todo-modes-set-2 ()
+  "Make some settings that apply to multiple Todo modes."
+  (add-to-invisibility-spec 'todo)
+  (setq buffer-read-only t)
+  (when (boundp 'hl-line-range-function)
+    (setq-local hl-line-range-function
+               (lambda() (save-excursion
+                           (when (todo-item-end)
+                             (cons (todo-item-start)
+                                   (todo-item-end))))))))
+
+(defun todo-modes-set-3 ()
+  "Make some settings that apply to multiple Todo modes."
+  (setq-local todo-categories (todo-set-categories))
+  (setq-local todo-category-number 1)
+  (add-hook 'find-file-hook 'todo-display-as-todo-file nil t))
+
+(put 'todo-mode 'mode-class 'special)
+
+(define-derived-mode todo-mode special-mode "Todo"
+  "Major mode for displaying, navigating and editing todo lists.
+
+\\{todo-mode-map}"
+  ;; (easy-menu-add todo-menu)
+  (todo-modes-set-1)
+  (todo-modes-set-2)
+  (todo-modes-set-3)
+  ;; Initialize todo-current-todo-file.
+  (when (member (file-truename (buffer-file-name))
+               (funcall todo-files-function))
+    (setq-local todo-current-todo-file (file-truename (buffer-file-name))))
+  (setq-local todo-show-done-only nil)
+  (setq-local todo-categories-with-marks nil)
+  (add-hook 'find-file-hook 'todo-add-to-buffer-list nil t)
+  (add-hook 'post-command-hook 'todo-update-buffer-list nil t)
+  (when todo-show-current-file
+    (add-hook 'pre-command-hook 'todo-show-current-file nil t))
+  (add-hook 'window-configuration-change-hook
+           'todo-reset-and-enable-done-separator nil t)
+  (add-hook 'kill-buffer-hook 'todo-reset-global-current-todo-file nil t))
+
+(put 'todo-archive-mode 'mode-class 'special)
+
+;; If todo-mode is parent, all todo-mode key bindings appear to be
+;; available in todo-archive-mode (e.g. shown by C-h m).
+(define-derived-mode todo-archive-mode special-mode "Todo-Arch"
+  "Major mode for archived todo categories.
+
+\\{todo-archive-mode-map}"
+  (todo-modes-set-1)
+  (todo-modes-set-2)
+  (todo-modes-set-3)
+  (setq-local todo-current-todo-file (file-truename (buffer-file-name)))
+  (setq-local todo-show-done-only t))
+
+(defun todo-mode-external-set ()
+  "Set `todo-categories' externally to `todo-current-todo-file'."
+  (setq-local todo-current-todo-file todo-global-current-todo-file)
+  (let ((cats (with-current-buffer
+                 ;; Can't use find-buffer-visiting when
+                 ;; `todo-show-categories-table' is called on first
+                 ;; invocation of `todo-show', since there is then
+                 ;; no buffer visiting the current file.
+                 (find-file-noselect todo-current-todo-file 'nowarn)
+               (or todo-categories
+                   ;; In Todo Edit mode todo-categories is now nil
+                   ;; since it uses same buffer as Todo mode but
+                   ;; doesn't have the latter's local variables.
+                   (save-excursion
+                     (goto-char (point-min))
+                     (read (buffer-substring-no-properties
+                            (line-beginning-position)
+                            (line-end-position))))))))
+    (setq-local todo-categories cats)))
+
+(define-derived-mode todo-edit-mode text-mode "Todo-Ed"
+  "Major mode for editing multiline todo items.
+
+\\{todo-edit-mode-map}"
+  (todo-modes-set-1)
+  (todo-mode-external-set)
+  (setq buffer-read-only nil))
+
+(put 'todo-categories-mode 'mode-class 'special)
+
+(define-derived-mode todo-categories-mode special-mode "Todo-Cats"
+  "Major mode for displaying and editing todo categories.
+
+\\{todo-categories-mode-map}"
+  (todo-mode-external-set))
+
+(put 'todo-filtered-items-mode 'mode-class 'special)
+
+(define-derived-mode todo-filtered-items-mode special-mode "Todo-Fltr"
+  "Mode for displaying and reprioritizing top priority Todo.
+
+\\{todo-filtered-items-mode-map}"
+  (todo-modes-set-1)
+  (todo-modes-set-2))
+
+(add-to-list 'auto-mode-alist '("\\.todo\\'" . todo-mode))
+(add-to-list 'auto-mode-alist '("\\.toda\\'" . todo-archive-mode))
+(add-to-list 'auto-mode-alist '("\\.tod[tyr]\\'" . todo-filtered-items-mode))
+
+;; 
-----------------------------------------------------------------------------
+(provide 'todo-mode)
+
+;;; todo-mode.el ends here

=== renamed file 'lisp/calendar/todo-mode.el' => 'lisp/obsolete/otodo-mode.el'

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