;;; windmove.el --- directional window-selection routines
;;
-;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+;; Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004,
+;; 2005, 2006 Free Software Foundation, Inc.
;;
;; Author: Hovav Shacham (hovav@cs.stanford.edu)
;; Created: 17 October 1998
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;
;; --------------------------------------------------------------------
;; 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 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
(let* ((frame (if window
(window-frame window)
(selected-frame)))
- (top-left (window-inside-edges (frame-first-window frame)))
+ (top-left (window-edges (frame-first-window frame)))
(x-min (nth 0 top-left))
(y-min (nth 1 top-left))
- (x-max (+ x-min (frame-width frame) -1)) ; 1- for last row & col
- (y-max (+ x-max (frame-height frame) -1)))
+ (x-max (1- (frame-width frame))) ; 1- for last row & col
+ (y-max (1- (frame-height frame))))
(list x-min y-min x-max y-max)))
;; it turns out that constraining is always a good thing, even when
(windmove-constrain-around-range (cdr coord) min-y max-y)))))
-
-;; `windmove-coordinates-of-position' is stolen and modified from the
-;; Emacs 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.
-(defun windmove-coordinates-of-position (pos &optional window)
- "Return the coordinates of position POS in window 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.
-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* ((wind (if (null window) (selected-window) window))
- (usable-width (1- (window-width wind))) ; 1- for cont. column
- (usable-height (1- (window-height wind))) ; 1- for mode line
- (big-hairy-result (compute-motion
- (window-start)
- '(0 . 0)
- pos
- (cons usable-width usable-height)
- usable-width
- (cons (window-hscroll)
- 0) ; why zero?
- wind)))
- (cons (nth 1 big-hairy-result) ; hpos, not vpos as documented
- (nth 2 big-hairy-result)))) ; vpos, not hpos as documented
-
;; 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.
((= effective-arg 0)
(windmove-coord-add
top-left
- (windmove-coordinates-of-position (window-point window)
- window)))))))
+ (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
(- (nth 1 edges)
windmove-window-distance-delta))) ; (x, y0-d)
((eq dir 'right)
- (cons (+ (nth 2 edges)
+ (cons (+ (1- (nth 2 edges)) ; -1 to get actual max x
windmove-window-distance-delta)
- (cdr refpoint))) ; (x1+d, y)
- ((eq dir 'down)
+ (cdr refpoint))) ; (x1+d-1, y)
+ ((eq dir 'down) ; -1 to get actual max y
(cons (car refpoint)
- (+ (nth 3 edges)
- windmove-window-distance-delta))) ; (x, y1+d)
+ (+ (1- (nth 3 edges))
+ windmove-window-distance-delta))) ; (x, y1+d-1)
(t (error "Invalid direction of movement: %s" dir)))))
(defun windmove-find-other-window (dir &optional arg window)
(provide 'windmove)
+;;; arch-tag: 56267432-bf1a-4296-a9a0-85c6bd9f2375
;;; windmove.el ends here