|
428
|
1 ;;; window.el --- XEmacs window commands aside from those written in C.
|
|
|
2
|
|
|
3 ;; Copyright (C) 1985, 1989, 1993-94, 1997 Free Software Foundation, Inc.
|
|
|
4 ;; Copyright (C) 1995, 1996 Ben Wing.
|
|
|
5
|
|
|
6 ;; Maintainer: XEmacs Development Team
|
|
|
7 ;; Keywords: frames, extensions, dumped
|
|
|
8
|
|
|
9 ;; This file is part of XEmacs.
|
|
|
10
|
|
|
11 ;; XEmacs is free software; you can redistribute it and/or modify it
|
|
|
12 ;; under the terms of the GNU General Public License as published by
|
|
|
13 ;; the Free Software Foundation; either version 2, or (at your option)
|
|
|
14 ;; any later version.
|
|
|
15
|
|
|
16 ;; XEmacs is distributed in the hope that it will be useful, but
|
|
|
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
19 ;; General Public License for more details.
|
|
|
20
|
|
|
21 ;; You should have received a copy of the GNU General Public License
|
|
|
22 ;; along with XEmacs; see the file COPYING. If not, write to the
|
|
|
23 ;; Free Software Foundation, 59 Temple Place - Suite 330,
|
|
|
24 ;; Boston, MA 02111-1307, USA.
|
|
|
25
|
|
|
26 ;;; Synched up with: Emacs/Mule zeta.
|
|
|
27
|
|
|
28 ;;; Commentary:
|
|
|
29
|
|
|
30 ;; This file is dumped with XEmacs.
|
|
|
31
|
|
|
32 ;;; Code:
|
|
|
33
|
|
|
34 ;;;; Window tree functions.
|
|
|
35
|
|
444
|
36 (defun one-window-p (&optional nomini which-frames which-devices)
|
|
428
|
37 "Return non-nil if the selected window is the only window (in its frame).
|
|
|
38 Optional arg NOMINI non-nil means don't count the minibuffer
|
|
|
39 even if it is active.
|
|
|
40
|
|
444
|
41 By default, only the windows in the selected frame are considered.
|
|
|
42 The optional argument WHICH-FRAMES changes this behavior:
|
|
|
43 WHICH-FRAMES nil or omitted means count only the selected frame,
|
|
428
|
44 plus the minibuffer it uses (which may be on another frame).
|
|
444
|
45 WHICH-FRAMES = `visible' means include windows on all visible frames.
|
|
|
46 WHICH-FRAMES = 0 means include windows on all visible and iconified frames.
|
|
|
47 WHICH-FRAMES = t means include windows on all frames including invisible frames.
|
|
|
48 If WHICH-FRAMES is any other value, count only the selected frame.
|
|
428
|
49
|
|
444
|
50 The optional third argument WHICH-DEVICES further clarifies on which
|
|
|
51 devices to search for frames as specified by WHICH-FRAMES. This value
|
|
|
52 is only meaningful if WHICH-FRAMES is non-nil.
|
|
|
53 If nil or omitted, search all devices on the selected console.
|
|
|
54 If a device, only search that device.
|
|
|
55 If a console, search all devices on that console.
|
|
|
56 If a device type, search all devices of that type.
|
|
|
57 If `window-system', search all devices on window-system consoles.
|
|
|
58 Any other non-nil value means search all devices."
|
|
428
|
59 (let ((base-window (selected-window)))
|
|
|
60 (if (and nomini (eq base-window (minibuffer-window)))
|
|
|
61 (setq base-window (next-window base-window)))
|
|
|
62 (eq base-window
|
|
444
|
63 (next-window base-window (if nomini 'arg) which-frames which-devices))))
|
|
428
|
64
|
|
444
|
65 (defun walk-windows (function &optional minibuf which-frames which-devices)
|
|
|
66 "Cycle through all visible windows, calling FUNCTION for each one.
|
|
|
67 FUNCTION is called with a window as argument.
|
|
428
|
68
|
|
|
69 Optional second arg MINIBUF t means count the minibuffer window even
|
|
|
70 if not active. MINIBUF nil or omitted means count the minibuffer iff
|
|
|
71 it is active. MINIBUF neither t nor nil means not to count the
|
|
|
72 minibuffer even if it is active.
|
|
|
73
|
|
|
74 Several frames may share a single minibuffer; if the minibuffer
|
|
|
75 counts, all windows on all frames that share that minibuffer count
|
|
|
76 too. Therefore, when a separate minibuffer frame is active,
|
|
|
77 `walk-windows' includes the windows in the frame from which you
|
|
|
78 entered the minibuffer, as well as the minibuffer window. But if the
|
|
444
|
79 minibuffer does not count, only the selected window counts.
|
|
428
|
80
|
|
444
|
81 By default, only the windows in the selected frame are included.
|
|
|
82 The optional argument WHICH-FRAMES changes this behavior:
|
|
|
83 WHICH-FRAMES nil or omitted means cycle within the frames as specified above.
|
|
|
84 WHICH-FRAMES = `visible' means include windows on all visible frames.
|
|
|
85 WHICH-FRAMES = 0 means include windows on all visible and iconified frames.
|
|
|
86 WHICH-FRAMES = t means include windows on all frames including invisible frames.
|
|
428
|
87 Anything else means restrict to WINDOW's frame.
|
|
|
88
|
|
444
|
89 The optional fourth argument WHICH-DEVICES further clarifies on which
|
|
|
90 devices to search for frames as specified by WHICH-FRAMES. This value
|
|
|
91 is only meaningful if WHICH-FRAMES is non-nil.
|
|
|
92 If nil or omitted, search all devices on the selected console.
|
|
|
93 If a device, only search that device.
|
|
|
94 If a console, search all devices on that console.
|
|
|
95 If a device type, search all devices of that type.
|
|
|
96 If `window-system', search all devices on window-system consoles.
|
|
|
97 Any other non-nil value means search all devices."
|
|
428
|
98 ;; If we start from the minibuffer window, don't fail to come back to it.
|
|
|
99 (if (window-minibuffer-p (selected-window))
|
|
|
100 (setq minibuf t))
|
|
|
101 ;; Note that, like next-window & previous-window, this behaves a little
|
|
|
102 ;; strangely if the selected window is on an invisible frame: it hits
|
|
|
103 ;; some of the windows on that frame, and all windows on visible frames.
|
|
|
104 (let* ((walk-windows-start (selected-window))
|
|
|
105 (walk-windows-current walk-windows-start))
|
|
|
106 (while (progn
|
|
|
107 (setq walk-windows-current
|
|
444
|
108 (next-window walk-windows-current minibuf which-frames
|
|
|
109 which-devices))
|
|
|
110 (funcall function walk-windows-current)
|
|
428
|
111 (not (eq walk-windows-current walk-windows-start))))))
|
|
|
112 ;; The old XEmacs definition of the above clause. It's more correct in
|
|
|
113 ;; that it will never hit a window that's already been hit even if you
|
|
|
114 ;; do something odd like `delete-other-windows', but has the problem
|
|
|
115 ;; that it conses. (This may be called repeatedly, from lazy-lock
|
|
|
116 ;; for example.)
|
|
|
117 ; (let* ((walk-windows-history nil)
|
|
|
118 ; (walk-windows-current (selected-window)))
|
|
|
119 ; (while (progn
|
|
|
120 ; (setq walk-windows-current
|
|
444
|
121 ; (next-window walk-windows-current minibuf which-frames
|
|
|
122 ; which-devices))
|
|
428
|
123 ; (not (memq walk-windows-current walk-windows-history)))
|
|
|
124 ; (setq walk-windows-history (cons walk-windows-current
|
|
|
125 ; walk-windows-history))
|
|
444
|
126 ; (funcall function walk-windows-current))))
|
|
428
|
127
|
|
|
128 (defun minibuffer-window-active-p (window)
|
|
|
129 "Return t if WINDOW (a minibuffer window) is now active."
|
|
|
130 (eq window (active-minibuffer-window)))
|
|
|
131
|
|
|
132 (defmacro save-selected-window (&rest body)
|
|
|
133 "Execute BODY, then select the window that was selected before BODY."
|
|
442
|
134 `(let ((save-selected-window-window (selected-window)))
|
|
|
135 (unwind-protect
|
|
|
136 (progn ,@body)
|
|
|
137 (when (window-live-p save-selected-window-window)
|
|
|
138 (select-window save-selected-window-window)))))
|
|
|
139
|
|
|
140 (defmacro with-selected-window (window &rest body)
|
|
|
141 "Execute forms in BODY with WINDOW as the selected window.
|
|
|
142 The value returned is the value of the last form in BODY."
|
|
|
143 `(save-selected-window
|
|
|
144 (select-window ,window)
|
|
|
145 ,@body))
|
|
|
146
|
|
428
|
147
|
|
|
148 (defun count-windows (&optional minibuf)
|
|
|
149 "Return the number of visible windows.
|
|
|
150 Optional arg MINIBUF non-nil means count the minibuffer
|
|
|
151 even if it is inactive."
|
|
|
152 (let ((count 0))
|
|
|
153 (walk-windows (function (lambda (w)
|
|
|
154 (setq count (+ count 1))))
|
|
|
155 minibuf)
|
|
|
156 count))
|
|
|
157
|
|
|
158 (defun balance-windows ()
|
|
|
159 "Make all visible windows the same height (approximately)."
|
|
|
160 (interactive)
|
|
|
161 (let ((count -1) levels newsizes size)
|
|
|
162 ;FSFmacs
|
|
|
163 ;;; Don't count the lines that are above the uppermost windows.
|
|
|
164 ;;; (These are the menu bar lines, if any.)
|
|
|
165 ;(mbl (nth 1 (window-edges (frame-first-window (selected-frame))))))
|
|
|
166 ;; Find all the different vpos's at which windows start,
|
|
|
167 ;; then count them. But ignore levels that differ by only 1.
|
|
|
168 (save-window-excursion
|
|
|
169 (let (tops (prev-top -2))
|
|
|
170 (walk-windows (function (lambda (w)
|
|
|
171 (setq tops (cons (nth 1 (window-pixel-edges w))
|
|
|
172 tops))))
|
|
|
173 'nomini)
|
|
|
174 (setq tops (sort tops '<))
|
|
|
175 (while tops
|
|
|
176 (if (> (car tops) (1+ prev-top))
|
|
|
177 (setq prev-top (car tops)
|
|
|
178 count (1+ count)))
|
|
|
179 (setq levels (cons (cons (car tops) count) levels))
|
|
|
180 (setq tops (cdr tops)))
|
|
|
181 (setq count (1+ count))))
|
|
|
182 ;; Subdivide the frame into that many vertical levels.
|
|
|
183 ;FSFmacs (setq size (/ (- (frame-height) mbl) count))
|
|
|
184 (setq size (/ (window-pixel-height (frame-root-window)) count))
|
|
|
185 (walk-windows (function
|
|
|
186 (lambda (w)
|
|
|
187 (select-window w)
|
|
|
188 (let ((newtop (cdr (assq (nth 1 (window-pixel-edges))
|
|
|
189 levels)))
|
|
|
190 (newbot (or (cdr (assq
|
|
|
191 (+ (window-pixel-height)
|
|
|
192 (nth 1 (window-pixel-edges)))
|
|
|
193 levels))
|
|
|
194 count)))
|
|
|
195 (setq newsizes
|
|
|
196 (cons (cons w (* size (- newbot newtop)))
|
|
|
197 newsizes)))))
|
|
|
198 'nomini)
|
|
|
199 (walk-windows (function (lambda (w)
|
|
|
200 (select-window w)
|
|
|
201 (let ((newsize (cdr (assq w newsizes))))
|
|
|
202 (enlarge-window
|
|
|
203 (/ (- newsize (window-pixel-height))
|
|
|
204 (face-height 'default))))))
|
|
|
205 'nomini)))
|
|
|
206
|
|
|
207 ;;; I think this should be the default; I think people will prefer it--rms.
|
|
|
208 (defcustom split-window-keep-point t
|
|
|
209 "*If non-nil, split windows keeps the original point in both children.
|
|
|
210 This is often more convenient for editing.
|
|
|
211 If nil, adjust point in each of the two windows to minimize redisplay.
|
|
|
212 This is convenient on slow terminals, but point can move strangely."
|
|
|
213 :type 'boolean
|
|
|
214 :group 'windows)
|
|
|
215
|
|
|
216 (defun split-window-vertically (&optional arg)
|
|
|
217 "Split current window into two windows, one above the other.
|
|
|
218 The uppermost window gets ARG lines and the other gets the rest.
|
|
|
219 Negative arg means select the size of the lowermost window instead.
|
|
|
220 With no argument, split equally or close to it.
|
|
|
221 Both windows display the same buffer now current.
|
|
|
222
|
|
|
223 If the variable split-window-keep-point is non-nil, both new windows
|
|
|
224 will get the same value of point as the current window. This is often
|
|
|
225 more convenient for editing.
|
|
|
226
|
|
444
|
227 Otherwise, we choose window starts so as to minimize the amount of
|
|
428
|
228 redisplay; this is convenient on slow terminals. The new selected
|
|
|
229 window is the one that the current value of point appears in. The
|
|
|
230 value of point can change if the text around point is hidden by the
|
|
|
231 new mode line.
|
|
|
232
|
|
|
233 Programs should probably use split-window instead of this."
|
|
|
234 (interactive "P")
|
|
|
235 (let ((old-w (selected-window))
|
|
|
236 (old-point (point))
|
|
|
237 (size (and arg (prefix-numeric-value arg)))
|
|
|
238 (window-full-p nil)
|
|
|
239 new-w bottom moved)
|
|
|
240 (and size (< size 0) (setq size (+ (window-height) size)))
|
|
|
241 (setq new-w (split-window nil size))
|
|
|
242 (or split-window-keep-point
|
|
|
243 (progn
|
|
|
244 (save-excursion
|
|
|
245 (set-buffer (window-buffer))
|
|
|
246 (goto-char (window-start))
|
|
|
247 (setq moved (vertical-motion (window-height)))
|
|
|
248 (set-window-start new-w (point))
|
|
|
249 (if (> (point) (window-point new-w))
|
|
|
250 (set-window-point new-w (point)))
|
|
|
251 (and (= moved (window-height))
|
|
|
252 (progn
|
|
|
253 (setq window-full-p t)
|
|
|
254 (vertical-motion -1)))
|
|
|
255 (setq bottom (point)))
|
|
|
256 (and window-full-p
|
|
|
257 (<= bottom (point))
|
|
|
258 (set-window-point old-w (1- bottom)))
|
|
|
259 (and window-full-p
|
|
|
260 (<= (window-start new-w) old-point)
|
|
|
261 (progn
|
|
|
262 (set-window-point new-w old-point)
|
|
|
263 (select-window new-w)))))
|
|
|
264 new-w))
|
|
|
265
|
|
|
266 (defun split-window-horizontally (&optional arg)
|
|
|
267 "Split current window into two windows side by side.
|
|
|
268 This window becomes the leftmost of the two, and gets ARG columns.
|
|
|
269 Negative arg means select the size of the rightmost window instead.
|
|
|
270 No arg means split equally."
|
|
|
271 (interactive "P")
|
|
|
272 (let ((size (and arg (prefix-numeric-value arg))))
|
|
|
273 (and size (< size 0)
|
|
|
274 (setq size (+ (window-width) size)))
|
|
|
275 (split-window nil size t)))
|
|
|
276
|
|
|
277 (defun enlarge-window-horizontally (arg)
|
|
|
278 "Make current window ARG columns wider."
|
|
|
279 (interactive "p")
|
|
|
280 (enlarge-window arg t))
|
|
|
281
|
|
|
282 (defun shrink-window-horizontally (arg)
|
|
|
283 "Make current window ARG columns narrower."
|
|
|
284 (interactive "p")
|
|
|
285 (shrink-window arg t))
|
|
|
286
|
|
|
287 (defun shrink-window-if-larger-than-buffer (&optional window)
|
|
|
288 "Shrink the WINDOW to be as small as possible to display its contents.
|
|
|
289 Do not shrink to less than `window-min-height' lines.
|
|
|
290 Do nothing if the buffer contains more lines than the present window height,
|
|
|
291 or if some of the window's contents are scrolled out of view,
|
|
|
292 or if the window is not the full width of the frame,
|
|
|
293 or if the window is the only window of its frame."
|
|
|
294 (interactive)
|
|
|
295 (or window (setq window (selected-window)))
|
|
|
296 (save-excursion
|
|
|
297 (set-buffer (window-buffer window))
|
|
|
298 (let ((n 0)
|
|
|
299 (test-pos
|
|
|
300 (- (point-max)
|
|
|
301 ;; If buffer ends with a newline, ignore it when counting
|
|
|
302 ;; height unless point is after it.
|
|
|
303 (if (and (not (eobp))
|
|
|
304 (eq ?\n (char-after (1- (point-max)))))
|
|
|
305 1 0)))
|
|
442
|
306 (mini (frame-property (window-frame window) 'minibuffer)))
|
|
428
|
307 (if (and (< 1 (let ((frame (selected-frame)))
|
|
|
308 (select-frame (window-frame window))
|
|
|
309 (unwind-protect
|
|
|
310 (count-windows)
|
|
|
311 (select-frame frame))))
|
|
|
312 ;; check to make sure that the window is the full width
|
|
|
313 ;; of the frame
|
|
440
|
314 (window-leftmost-p window)
|
|
|
315 (window-rightmost-p window)
|
|
428
|
316 ;; The whole buffer must be visible.
|
|
|
317 (pos-visible-in-window-p (point-min) window)
|
|
|
318 ;; The frame must not be minibuffer-only.
|
|
|
319 (not (eq mini 'only)))
|
|
|
320 (progn
|
|
|
321 (save-window-excursion
|
|
|
322 (goto-char (point-min))
|
|
|
323 (while (and (window-live-p window)
|
|
|
324 (pos-visible-in-window-p test-pos window))
|
|
|
325 (shrink-window 1 nil window)
|
|
|
326 (setq n (1+ n))))
|
|
|
327 (if (> n 0)
|
|
|
328 (shrink-window (min (1- n)
|
|
|
329 (- (window-height window)
|
|
|
330 (1+ window-min-height)))
|
|
|
331 nil
|
|
|
332 window)))))))
|
|
|
333
|
|
|
334 (defun kill-buffer-and-window ()
|
|
|
335 "Kill the current buffer and delete the selected window."
|
|
|
336 (interactive)
|
|
|
337 (if (yes-or-no-p (format "Kill buffer `%s'? " (buffer-name)))
|
|
|
338 (let ((buffer (current-buffer)))
|
|
|
339 (delete-window (selected-window))
|
|
|
340 (kill-buffer buffer))
|
|
|
341 (error "Aborted")))
|
|
|
342
|
|
444
|
343 (defun window-list (&optional minibuf which-frames which-devices)
|
|
428
|
344 "Return a list of existing windows.
|
|
|
345 If the optional argument MINIBUF is non-nil, then include minibuffer
|
|
|
346 windows in the result.
|
|
|
347
|
|
|
348 By default, only the windows in the selected frame are returned.
|
|
444
|
349 The optional argument WHICH-FRAMES changes this behavior:
|
|
|
350 WHICH-FRAMES = `visible' means include windows on all visible frames.
|
|
|
351 WHICH-FRAMES = 0 means include windows on all visible and iconified frames.
|
|
|
352 WHICH-FRAMES = t means include windows on all frames including invisible frames.
|
|
428
|
353 Anything else means restrict to the selected frame.
|
|
444
|
354
|
|
|
355 The optional fourth argument WHICH-DEVICES further clarifies on which
|
|
|
356 devices to search for frames as specified by WHICH-FRAMES. This value
|
|
|
357 is only meaningful if WHICH-FRAMES is non-nil.
|
|
|
358 If nil or omitted, search all devices on the selected console.
|
|
|
359 If a device, only search that device.
|
|
|
360 If a console, search all devices on that console.
|
|
|
361 If a device type, search all devices of that type.
|
|
|
362 If `window-system', search all devices on window-system consoles.
|
|
|
363 Any other non-nil value means search all devices."
|
|
428
|
364 (let ((wins nil))
|
|
|
365 (walk-windows (lambda (win)
|
|
|
366 (push win wins))
|
|
444
|
367 minibuf which-frames which-devices)
|
|
428
|
368 wins))
|
|
|
369
|
|
|
370 ;;; window.el ends here
|
