[Emacs-diffs] Changes to emacs/lisp/calendar/calendar.el,v

[Glenn Morris]

CVSROOT:        /sources/emacs
Module name:    emacs
Changes by:     Glenn Morris <gm>       08/03/10 02:45:27

Index: calendar.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/calendar/calendar.el,v
retrieving revision 1.216
retrieving revision 1.217
diff -u -b -r1.216 -r1.217
--- calendar.el 9 Mar 2008 19:20:52 -0000       1.216
+++ calendar.el 10 Mar 2008 02:45:26 -0000      1.217
@@ -93,8 +93,6 @@
 
 ;;; Code:
 
-(defvar displayed-month)
-(defvar displayed-year)
 
 (require 'cal-loaddefs)
 (require 'cal-menu)
@@ -334,7 +332,7 @@
 that date.  MONTH and DAY are one or two digit numbers, YEAR is a
 number and may be written in full or abbreviated to the final two
 digits (if `abbreviated-calendar-year' is non-nil).  MONTHNAME
-and DAYNAME can be spelled in full (as specified by the variables
+and DAYNAME can be spelt in full (as specified by the variables
 `calendar-month-name-array' and `calendar-day-name-array'),
 abbreviated (as specified by `calendar-month-abbrev-array' and
 `calendar-day-abbrev-array') with or without a period,
@@ -759,7 +757,8 @@
                           (list m 1 y))))))
              (if (zerop (% (1+ year) 4))
                  22
-               21))) "\"Tal Umatar\" (evening)"))))
+               21))) "\"Tal Umatar\" (evening)")))
+  "Component of the default value of `hebrew-holidays'.")
 ;;;###autoload
 (put 'hebrew-holidays-1 'risky-local-variable t)
 
@@ -781,7 +780,8 @@
              11 10))
        "Tzom Teveth"))
     (if all-hebrew-calendar-holidays
-        (holiday-hebrew 11 15 "Tu B'Shevat"))))
+        (holiday-hebrew 11 15 "Tu B'Shevat")))
+  "Component of the default value of `hebrew-holidays'.")
 ;;;###autoload
 (put 'hebrew-holidays-2 'risky-local-variable t)
 
@@ -814,7 +814,8 @@
                           (list 11 16 h-year))))))
                   (day (extract-calendar-day s-s)))
              day))
-         "Shabbat Shirah"))))
+         "Shabbat Shirah")))
+  "Component of the default value of `hebrew-holidays'.")
 ;;;###autoload
 (put 'hebrew-holidays-3 'risky-local-variable t)
 
@@ -828,12 +829,13 @@
                (increment-calendar-month m y -1)
                (let ((year (extract-calendar-year
                             (calendar-julian-from-absolute
-                             (calendar-absolute-from-gregorian
+                            cd - (calendar-absolute-from-gregorian
                               (list m 1 y))))))
                  (= 21 (% year 28)))))
         (holiday-julian 3 26 "Kiddush HaHamah"))
     (if all-hebrew-calendar-holidays
-        (holiday-tisha-b-av-etc))))
+        (holiday-tisha-b-av-etc)))
+    "Component of the default value of `hebrew-holidays'.")
 ;;;###autoload
 (put 'hebrew-holidays-4 'risky-local-variable t)
 
@@ -1172,6 +1174,9 @@
      (and (< macro-y 0) (> ,mon 1) (setq ,yr (1- ,yr)))
      (if (< ,yr 1) (setq ,yr (1- ,yr))))) ; 0 AD -> -1 BC, etc
 
+(defvar displayed-month)
+(defvar displayed-year)
+
 (defun calendar-increment-month (n &optional mon yr)
   "Return the Nth month after MON/YR.
 The return value is a pair (MONTH . YEAR).
@@ -1224,8 +1229,6 @@
 ;;    43   calendar-date-equal
 ;;    38   calendar-gregorian-from-absolute
 ;;     .
-;;     .
-;;     .
 ;;
 ;; The use of these seven macros eliminates the overhead of 92% of the function
 ;; calls; it's faster this way.
@@ -1255,11 +1258,11 @@
 ;; The foregoing is a bit faster, but not as clear as the following:
 ;;
 ;;(defsubst calendar-leap-year-p (year)
-;;  "Returns t if YEAR is a Gregorian leap year."
+;;  "Return t if YEAR is a Gregorian leap year."
 ;;  (or
-;;    (and (=  (% year   4) 0)
-;;         (/= (% year 100) 0))
-;;    (= (% year 400) 0)))
+;;   (and (zerop (% year 4))
+;;        (not (zerop (% year 100))))
+;;   (zerop (% year 400)))
 
 (defsubst calendar-last-day-of-month (month year)
   "The last day in MONTH during YEAR."
@@ -1293,12 +1296,12 @@
 return negative results."
   (let ((year (extract-calendar-year date))
         offset-years)
-    (cond ((= year 0)
+    (cond ((zerop year)
            (error "There was no year zero"))
           ((> year 0)
            (setq offset-years (1- year))
-           (+ (calendar-day-number date) ; Days this year
-              (* 365 offset-years)       ; + Days in prior years
+           (+ (calendar-day-number date) ; days this year
+              (* 365 offset-years)       ; + days in prior years
               (/ offset-years 4)         ; + Julian leap years
               (- (/ offset-years 100))   ; - century years
               (/ offset-years 400)))     ; + Gregorian leap years
@@ -1315,7 +1318,7 @@
 ;;;###autoload
 (defun calendar (&optional arg)
   "Choose between the one frame, two frame, or basic calendar displays.
-If called with an optional prefix argument, prompts for month and year.
+If called with an optional prefix argument ARG, prompts for month and year.
 
 The original function `calendar' has been renamed `calendar-basic-setup'.
 See the documentation of that function for more information."
@@ -1344,7 +1347,7 @@
 The three months appear side by side, with the current month in the middle
 surrounded by the previous and next months.  The cursor is put on today's date.
 
-If called with an optional prefix argument, prompts for month and year.
+If called with an optional prefix argument ARG, prompts for month and year.
 
 This function is suitable for execution in a .emacs file; appropriate setting
 of the variable `view-diary-entries-initially' will cause the diary entries for
@@ -1370,7 +1373,7 @@
 
 After loading the calendar, the hooks given by the variable
 `calendar-load-hook' are run.  This is the place to add key bindings to the
-calendar-mode-map.
+`calendar-mode-map'.
 
 After preparing the calendar window initially, the hooks given by the variable
 `initial-calendar-window-hook' are run.
@@ -1521,13 +1524,13 @@
      (if today-visible today (list displayed-month 1 displayed-year)))
     (set-buffer-modified-p nil)
     ;; Don't do any window-related stuff if we weren't called from a
-    ;; window displaying the calendar
+    ;; window displaying the calendar.
     (when in-calendar-window
       (if (or (one-window-p t) (not (window-full-width-p)))
           ;; Don't mess with the window size, but ensure that the first
-          ;; line is fully visible
+          ;; line is fully visible.
           (set-window-vscroll nil 0)
-        ;; Adjust the window to exactly fit the displayed calendar
+        ;; Adjust the window to exactly fit the displayed calendar.
         (fit-window-to-buffer nil nil calendar-minimum-window-height))
       (sit-for 0))
     (if (and (boundp 'font-lock-mode)
@@ -1565,7 +1568,7 @@
 located, but indented INDENT spaces.  The indentation is done from the first
 character on the line and does not disturb the first INDENT characters on the
 line."
-  (let* ((blank-days;; at start of month
+  (let* ((blank-days                    ; at start of month
           (mod
            (- (calendar-day-of-week (list month 1 year))
               calendar-week-start-day)
@@ -1576,7 +1579,7 @@
     (calendar-string-spread
      (list (format "%s %d" (calendar-month-name month) year)) ?  20)
     indent t)
-   (calendar-insert-indented "" indent);; Go to proper spot
+   (calendar-insert-indented "" indent) ; go to proper spot
    ;; Use the first two characters of each day to head the columns.
    (dotimes (i 7)
      (insert
@@ -1586,11 +1589,11 @@
             (truncate-string-to-width string 2)
           (substring string 0 2)))
       " "))
-   (calendar-insert-indented "" 0 t);; Force onto following line
-   (calendar-insert-indented "" indent);; Go to proper spot
-   ;; Add blank days before the first of the month
+   (calendar-insert-indented "" 0 t)    ; force onto following line
+   (calendar-insert-indented "" indent) ; go to proper spot
+   ;; Add blank days before the first of the month.
    (dotimes (idummy blank-days) (insert "   "))
-   ;; Put in the days of the month
+   ;; Put in the days of the month.
    (calendar-for-loop i from 1 to last do
       (insert (format "%2d " i))
       (add-text-properties
@@ -1599,8 +1602,8 @@
         help-echo "mouse-2: menu of operations for this date"))
       (and (zerop (mod (+ i blank-days) 7))
            (/= i last)
-           (calendar-insert-indented "" 0 t)    ;; Force onto following line
-           (calendar-insert-indented "" indent)))));; Go to proper spot
+           (calendar-insert-indented "" 0 t) ; force onto following line
+           (calendar-insert-indented "" indent))))) ; go to proper spot
 
 (defun calendar-insert-indented (string indent &optional newline)
   "Insert STRING at column INDENT.
@@ -1773,7 +1776,8 @@
     (define-key map [down-mouse-2]
       (easy-menu-binding cal-menu-global-mouse-menu))
 
-    map))
+    map)
+  "Keymap for `calendar-mode'.")
 
 (defun describe-calendar-mode ()
   "Create a help buffer with a brief description of the `calendar-mode'."
@@ -1791,7 +1795,8 @@
 ;; Calendar mode is suitable only for specially formatted data.
 (put 'calendar-mode 'mode-class 'special)
 
-(defvar calendar-mode-line-format
+;; After calendar-mode-map.
+(defcustom calendar-mode-line-format
   (list
    (propertize "<"
               'help-echo "mouse-1: previous month"
@@ -1835,7 +1840,7 @@
 defaults to the current date if it is otherwise undefined.  Here is an example
 value that has the Hebrew date, the day number/days remaining in the year,
 and the ISO week/year numbers in the mode.  When `calendar-move-hook' is set
-to `update-calendar-mode-line', these mode line shows these values for the date
+to `update-calendar-mode-line', the mode line shows these values for the date
 under the cursor:
 
       (list
@@ -1851,7 +1856,9 @@
           (format \"ISO week %d of %d\"
             (extract-calendar-month iso-date)
             (extract-calendar-year iso-date)))
-       \"\"))")
+       \"\"))"
+  :type 'sexp
+  :group 'calendar)
 
 (defun mouse-calendar-other-month (event)
   "Display a three-month calendar centered around a specified month and year."
@@ -1887,8 +1894,8 @@
   (update-calendar-mode-line)
   (make-local-variable 'calendar-mark-ring)
   (make-local-variable 'calendar-starred-day)
-  (make-local-variable 'displayed-month) ;; Month in middle of window.
-  (make-local-variable 'displayed-year)  ;; Year in middle of window.
+  (make-local-variable 'displayed-month) ; month in middle of window
+  (make-local-variable 'displayed-year)  ; year in middle of window
   ;; Most functions only work if displayed-month and displayed-year are set,
   ;; so let's make sure they're always set.  Most likely, this will be reset
   ;; soon in generate-calendar, but better safe than sorry.
@@ -1906,7 +1913,7 @@
 the STRINGS are just concatenated and the result truncated."
 ;; The algorithm is based on equation (3.25) on page 85 of Concrete
 ;; Mathematics by Ronald L. Graham, Donald E. Knuth, and Oren Patashnik,
-;; Addison-Wesley, Reading, MA, 1989
+;; Addison-Wesley, Reading, MA, 1989.
   (let* ((strings (mapcar 'eval
                           (if (< (length strings) 2)
                               (append (list "") strings (list ""))
@@ -1969,7 +1976,7 @@
             (yes-or-no-p
              "Diary modified; do you really want to exit the calendar? "))
         ;; Need to do this multiple times because one time can replace some
-        ;; calendar-related buffers with other calendar-related buffers
+        ;; calendar-related buffers with other calendar-related buffers.
         (mapc (lambda (x)
                 (mapc 'calendar-hide-window (calendar-window-list)))
               (calendar-window-list)))))
@@ -2034,19 +2041,19 @@
 ;;  "Compute the list (month day year) corresponding to the absolute DATE.
 ;;The absolute date is the number of days elapsed since the (imaginary)
 ;;Gregorian date Sunday, December 31, 1 BC."
-;;  (let* ((approx (/ date 366));; Approximation from below.
-;;         (year                ;; Search forward from the approximation.
+;;  (let* ((approx (/ date 366)) ; approximation from below
+;;         (year                ; search forward from the approximation
 ;;          (+ approx
 ;;             (calendar-sum y approx
 ;;                 (>= date (calendar-absolute-from-gregorian (list 1 1 (1+ 
y))))
 ;;                  1)))
-;;         (month         ;; Search forward from January.
+;;         (month                         ; search forward from January
 ;;          (1+ (calendar-sum m 1
 ;;                   (> date
 ;;                      (calendar-absolute-from-gregorian
 ;;                       (list m (calendar-last-day-of-month m year) year)))
 ;;                   1)))
-;;         (day           ;; Calculate the day by subtraction.
+;;         (day                      ; calculate the day by subtraction
 ;;          (- date
 ;;             (1- (calendar-absolute-from-gregorian (list month 1 year))))))
 ;;    (list month day year)))
@@ -2056,10 +2063,10 @@
 The absolute date is the number of days elapsed since the (imaginary)
 Gregorian date Sunday, December 31, 1 BC.  This function does not
 handle dates in years BC."
-;; See the footnote on page 384 of ``Calendrical Calculations, Part II:
-;; Three Historical Calendars'' by E. M. Reingold,  N. Dershowitz, and S. M.
-;; Clamen, Software--Practice and Experience, Volume 23, Number 4
-;; (April, 1993), pages 383-404 for an explanation.
+  ;; See the footnote on page 384 of ``Calendrical Calculations, Part II:
+  ;; Three Historical Calendars'' by E. M. Reingold,  N. Dershowitz, and S. M.
+  ;; Clamen, Software--Practice and Experience, Volume 23, Number 4
+  ;; (April, 1993), pages 383-404 for an explanation.
   (let* ((d0 (1- date))
          (n400 (/ d0 146097))
          (d1 (% d0 146097))
@@ -2098,7 +2105,7 @@
 (defun calendar-set-mark (arg)
   "Mark the date under the cursor, or jump to marked date.
 With no prefix argument, push current date onto marked date ring.
-With argument, jump to mark, pop it, and put point at end of ring."
+With argument ARG, jump to mark, pop it, and put point at end of ring."
   (interactive "P")
   (let ((date (calendar-cursor-to-date t)))
     (if (null arg)
@@ -2257,10 +2264,11 @@
     (,(regexp-opt
        (list (substring (aref calendar-day-name-array 6) 0 2)
             (substring (aref calendar-day-name-array 0) 0 2)))
-     ;; Saturdays and Sundays are hilited differently.
+     ;; Saturdays and Sundays are highlighted differently.
      . font-lock-comment-face)
     ;; First two chars of each day are used in the calendar.
-    (,(regexp-opt (mapcar (lambda (x) (substring x 0 2)) 
calendar-day-name-array))
+    (,(regexp-opt (mapcar (lambda (x) (substring x 0 2))
+                          calendar-day-name-array))
      . font-lock-reference-face))
   "Default keywords to highlight in Calendar mode.")
 
@@ -2379,11 +2387,11 @@
                     (and (facep mark) mark)                       ; face-name
                     diary-entry-marker))
           (cond
-           ;; face or an attr-list that contained a face
+           ;; Face or an attr-list that contained a face.
            ((facep mark)
             (overlay-put
              (make-overlay (1- (point)) (1+ (point))) 'face mark))
-           ;; single-char
+           ;; Single-character.
            ((and (stringp mark) (= (length mark) 1))
             (let ((inhibit-read-only t))
               (forward-char 1)
@@ -2391,7 +2399,7 @@
               (insert mark)
               (delete-char 1)
               (forward-char -2)))
-           (t ;; attr list
+           (t                           ; attr list
             (let ((temp-face
                    (make-symbol
                     (apply 'concat "temp-"
@@ -2403,14 +2411,13 @@
                                    mark))))
                   (faceinfo mark))
               (make-face temp-face)
-              ;; Remove :face info from the mark, copy the face info into
-              ;; temp-face
+              ;; Remove :face info from mark, copy the face info into 
temp-face.
               (while (setq faceinfo (memq :face faceinfo))
                 (copy-face (read (nth 1 faceinfo)) temp-face)
                 (setcar faceinfo nil)
                 (setcar (cdr faceinfo) nil))
               (setq mark (delq nil mark))
-              ;; Apply the font aspects
+              ;; Apply the font aspects.
               (apply 'set-face-attribute temp-face nil mark)
               (overlay-put
                (make-overlay (1- (point)) (1+ (point))) 'face temp-face))))))))
@@ -2586,6 +2593,7 @@
 
 
 (defun calendar-version ()
+  "Display the Calendar version."
   (interactive)
   (message "GNU Emacs %s" emacs-version))