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[Emacs-diffs] Changes to emacs/lisp/windmove.el
From: |
Kim F . Storm |
Subject: |
[Emacs-diffs] Changes to emacs/lisp/windmove.el |
Date: |
Wed, 17 Aug 2005 11:03:02 -0400 |
Index: emacs/lisp/windmove.el
diff -c emacs/lisp/windmove.el:1.11 emacs/lisp/windmove.el:1.12
*** emacs/lisp/windmove.el:1.11 Sat Aug 6 22:13:43 2005
--- emacs/lisp/windmove.el Wed Aug 17 15:03:00 2005
***************
*** 207,217 ****
;; rest.
;;
;; This work is done by `windmove-reference-loc'. It can figure out
! ;; the locations of the corners by calling `window-edges', but to
! ;; calculate the frame-based location of point, it calls the workhorse
! ;; function `windmove-coordinates-of-position', which itself calls the
! ;; incredibly hairy builtin `compute-motion'. There is a good deal of
! ;; black magic in getting all the arguments to this function just right.
;;
;; The second step is more messy. Conceptually, it is fairly simple:
;; if we know the reference location, and the coordinates of the
--- 207,214 ----
;; rest.
;;
;; This work is done by `windmove-reference-loc'. It can figure out
! ;; the locations of the corners by calling `window-edges' combined
! ;; with the result of `posn-at-point'.
;;
;; The second step is more messy. Conceptually, it is fairly simple:
;; if we know the reference location, and the coordinates of the
***************
*** 405,462 ****
(windmove-constrain-around-range (cdr coord) min-y max-y)))))
-
- ;; `windmove-coordinates-of-position' is stolen and modified from the
- ;; Emacs 20 Lisp Reference Manual, section 27.2.5. It seems to work
- ;; okay, although I am bothered by the fact that tab-offset (the cdr
- ;; of the next-to- last argument) is set to 0. On the other hand, I
- ;; can't find a single usage of `compute-motion' anywhere that doesn't
- ;; set this component to zero, and I'm too lazy to grovel through the
- ;; C source to figure out what's happening in the background. there
- ;; also seems to be a good deal of fun in calculating the correct
- ;; width of lines for telling `compute-motion' about; in particular,
- ;; it seems we need to subtract 1 (for the continuation column) from
- ;; the number that `window-width' gives, or continuation lines aren't
- ;; counted correctly. I haven't seen anyone doing this before,
- ;; though.
- ;;
- ;; Now updated for Emacs 21, based on the Emacs 21 Lisp Reference
- ;; Manual, section 30.2.5. It is no longer necessary to subtract
- ;; 1 for the usable width of the window.
- ;; TODO: also handle minibuffer case, w/ `minibuffer-prompt-width'.
- (defun windmove-coordinates-of-position (pos)
- "Return the coordinates of position POS in the current window.
- Return the window-based coodinates in a cons pair: (HPOS . VPOS),
- where HPOS and VPOS are the zero-based x and y components of the
- screen location of POS.
- As an example, if point is in the top left corner of a window, then
- the return value from `windmove-coordinates-of-position' is (0 . 0)
- regardless of the where point is in the buffer and where the window
- is placed in the frame."
- (let ((big-hairy-result (compute-motion
- (window-start)
- '(0 . 0)
- pos
- nil ; (window-width window-height)
- nil ; window-width
- (cons (window-hscroll)
- 0) ; why zero?
- (selected-window))))
- (cons (nth 1 big-hairy-result) ; hpos, not vpos as documented
- (nth 2 big-hairy-result)))) ; vpos, not hpos as documented
-
- (defun windmove-coordinates-of-window-position (pos &optional window)
- "Return the coordinates of position POS in WINDOW.
- Return the window-based coodinates in a cons pair: (HPOS . VPOS),
- where HPOS and VPOS are the zero-based x and y components of the
- screen location of POS. If WINDOW is nil, return the coordinates in
- the currently selected window."
- (if (null window)
- (windmove-coordinates-of-position pos)
- (save-selected-window
- (select-window window)
- (windmove-coordinates-of-position pos))))
-
;; This calculates the reference location in the current window: the
;; frame-based (x . y) of either point, the top-left, or the
;; bottom-right of the window, depending on ARG.
--- 402,407 ----
***************
*** 483,491 ****
((= effective-arg 0)
(windmove-coord-add
top-left
! (windmove-coordinates-of-window-position
! (window-point window)
! window)))))))
;; This uses the reference location in the current window (calculated
;; by `windmove-reference-loc' above) to find a reference location
--- 428,438 ----
((= effective-arg 0)
(windmove-coord-add
top-left
! (let ((col-row
! (posn-col-row
! (posn-at-point (window-point window) window))))
! (cons (- (car col-row) (window-hscroll window))
! (cdr col-row)))))))))
;; This uses the reference location in the current window (calculated
;; by `windmove-reference-loc' above) to find a reference location