;;; window.el --- GNU Emacs window commands aside from those written in C.
-;; Copyright (C) 1985, 1989, 1992, 1993, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1989, 1992, 1993, 1994, 2000
+;; Free Software Foundation, Inc.
;; Maintainer: FSF
ALL-FRAMES = `visible' means include windows on all visible frames.
ALL-FRAMES = 0 means include windows on all visible and iconified frames.
ALL-FRAMES = t means include windows on all frames including invisible frames.
+If ALL-FRAMES is a frame, it means include windows on that frame.
Anything else means restrict to the selected frame."
;; If we start from the minibuffer window, don't fail to come back to it.
(if (window-minibuffer-p (selected-window))
(setq minibuf t))
- (let* ((walk-windows-start (selected-window))
- (walk-windows-current walk-windows-start))
- (while (progn
- (setq walk-windows-current
- (next-window walk-windows-current minibuf all-frames))
- (funcall proc walk-windows-current)
- (not (eq walk-windows-current walk-windows-start))))))
+ (save-selected-window
+ (if (framep all-frames)
+ (select-window (frame-first-window all-frames)))
+ (let* ((walk-windows-start (selected-window))
+ (walk-windows-current walk-windows-start))
+ (while (progn
+ (setq walk-windows-current
+ (next-window walk-windows-current minibuf all-frames))
+ (funcall proc walk-windows-current)
+ (not (eq walk-windows-current walk-windows-start)))))))
(defun minibuffer-window-active-p (window)
"Return t if WINDOW (a minibuffer window) is now active."
\f
(defun count-windows (&optional minibuf)
"Returns the number of visible windows.
-Optional arg MINIBUF non-nil means count the minibuffer
+This counts the windows in the selected frame and (if the minibuffer is
+to be counted) its minibuffer frame (if that's not the same frame).
+The optional arg MINIBUF non-nil means count the minibuffer
even if it is inactive."
(let ((count 0))
(walk-windows (function (lambda (w)
With no argument, split equally or close to it.
Both windows display the same buffer now current.
-If the variable split-window-keep-point is non-nil, both new windows
+If the variable `split-window-keep-point' is non-nil, both new windows
will get the same value of point as the current window. This is often
more convenient for editing.
(select-window new-w)))))
(split-window-save-restore-data new-w old-w)))
+;; This is to avoid compiler warnings.
+(defvar view-return-to-alist)
+
(defun split-window-save-restore-data (new-w old-w)
(save-excursion
(set-buffer (window-buffer))
"Split current window into two windows side by side.
This window becomes the leftmost of the two, and gets ARG columns.
Negative arg means select the size of the rightmost window instead.
-No arg means split equally."
+The argument includes the width of the window's scroll bar; if there
+are no scroll bars, it includes the width of the divider column
+to the window's right, if any. No arg means split equally."
(interactive "P")
(let ((old-w (selected-window))
(size (and arg (prefix-numeric-value arg))))
(interactive "p")
(shrink-window arg t))
+(defun window-buffer-height (window)
+ "Return the height (in screen lines) of the buffer that WINDOW is displaying."
+ (save-excursion
+ (set-buffer (window-buffer window))
+ (goto-char (point-min))
+ (let ((ignore-final-newline
+ ;; If buffer ends with a newline, ignore it when counting height
+ ;; unless point is after it.
+ (and (not (eobp)) (eq ?\n (char-after (1- (point-max)))))))
+ (+ 1 (nth 2 (compute-motion (point-min)
+ '(0 . 0)
+ (- (point-max) (if ignore-final-newline 1 0))
+ (cons 0 100000000)
+ (window-width window)
+ nil
+ window))))))
+
+(defun count-screen-lines (&optional beg end count-final-newline window)
+ "Return the number of screen lines in the region.
+The number of screen lines may be different from the number of actual lines,
+due to line breaking, display table, etc.
+
+Optional arguments BEG and END default to `point-min' and `point-max'
+respectively.
+
+If region ends with a newline, ignore it unless optinal third argument
+COUNT-FINAL-NEWLINE is non-nil.
+
+The optional fourth argument WINDOW specifies the window used for obtaining
+parameters such as width, horizontal scrolling, and so on. The default is
+to use the selected window's parameters.
+
+Like `vertical-motion', `count-screen-lines' always uses the current buffer,
+regardless of which buffer is displayed in WINDOW. This makes possible to use
+`count-screen-lines' in any buffer, whether or not it is currently displayed
+in some window."
+ (unless beg
+ (setq beg (point-min)))
+ (unless end
+ (setq end (point-max)))
+ (if (= beg end)
+ 0
+ (save-excursion
+ (save-restriction
+ (widen)
+ (narrow-to-region (min beg end)
+ (if (and (not count-final-newline)
+ (= ?\n (char-before (max beg end))))
+ (1- (max beg end))
+ (max beg end)))
+ (goto-char (point-min))
+ (1+ (vertical-motion (buffer-size) window))))))
+
(defun shrink-window-if-larger-than-buffer (&optional window)
"Shrink the WINDOW to be as small as possible to display its contents.
Do not shrink to less than `window-min-height' lines.
or if the window is not the full width of the frame,
or if the window is the only window of its frame."
(interactive)
- (or window (setq window (selected-window)))
- (save-excursion
- (set-buffer (window-buffer window))
- (let* ((w (selected-window)) ;save-window-excursion can't win
- (buffer-file-name buffer-file-name)
- (p (point))
- (n 0)
- (ignore-final-newline
- ;; If buffer ends with a newline, ignore it when counting height
- ;; unless point is after it.
- (and (not (eobp))
- (eq ?\n (char-after (1- (point-max))))))
- (buffer-read-only nil)
- (modified (buffer-modified-p))
- (buffer (current-buffer))
- (params (frame-parameters (window-frame window)))
- (mini (cdr (assq 'minibuffer params)))
- (edges (window-edges (selected-window))))
- (if (and (< 1 (let ((frame (selected-frame)))
- (select-frame (window-frame window))
- (unwind-protect
- (count-windows)
- (select-frame frame))))
- (= (window-width window) (frame-width (window-frame window)))
- (pos-visible-in-window-p (point-min) window)
- (not (eq mini 'only))
- (or (not mini)
- (< (nth 3 edges)
- (nth 1 (window-edges mini)))
- (> (nth 1 edges)
- (cdr (assq 'menu-bar-lines params)))))
- (unwind-protect
- (progn
- (select-window (or window w))
- (goto-char (point-min))
- (while (pos-visible-in-window-p
- (- (point-max)
- (if ignore-final-newline 1 0)))
- ;; defeat file locking... don't try this at home, kids!
- (setq buffer-file-name nil)
- (insert ?\n) (setq n (1+ n)))
- (if (> n 0)
- (shrink-window (min (1- n)
- (- (window-height)
- window-min-height)))))
- (delete-region (point-min) (point))
- (set-buffer-modified-p modified)
- (goto-char p)
- (select-window w)
- ;; Make sure we unbind buffer-read-only
- ;; with the proper current buffer.
- (set-buffer buffer))))))
+ (save-selected-window
+ (if window
+ (select-window window)
+ (setq window (selected-window)))
+ (let* ((params (frame-parameters))
+ (mini (cdr (assq 'minibuffer params)))
+ (edges (window-edges)))
+ (if (and (< 1 (count-windows))
+ (= (window-width) (frame-width))
+ (pos-visible-in-window-p (point-min) window)
+ (not (eq mini 'only))
+ (or (not mini)
+ (< (nth 3 edges) (nth 1 (window-edges mini)))
+ (> (nth 1 edges) (cdr (assq 'menu-bar-lines params)))))
+ ;; `count-screen-lines' always works on the current buffer, so
+ ;; make sure it is the buffer displayed by WINDOW.
+ (let ((text-height (with-current-buffer (window-buffer window)
+ (count-screen-lines)))
+ (window-height (window-height)))
+ ;; Don't try to redisplay with the cursor at the end
+ ;; on its own line--that would force a scroll and spoil things.
+ (when (and (eobp) (bolp) (not (bobp)))
+ (forward-char -1))
+ (when (> window-height (1+ text-height))
+ (shrink-window
+ (- window-height (max (1+ text-height) window-min-height)))))))))
(defun kill-buffer-and-window ()
"Kill the current buffer and delete the selected window."
(kill-buffer buffer))
(error "Aborted")))
+(defun quit-window (&optional kill window)
+ "Quit the current buffer. Bury it, and maybe delete the selected frame.
+\(The frame is deleted if it is contains a dedicated window for the buffer.)
+With a prefix argument, kill the buffer instead.
+
+Noninteractively, if KILL is non-nil, then kill the current buffer,
+otherwise bury it.
+
+If WINDOW is non-nil, it specifies a window; we delete that window,
+and the buffer that is killed or buried is the one in that window."
+ (interactive "P")
+ (let ((buffer (window-buffer window))
+ (frame (window-frame (or window (selected-window))))
+ (window-solitary
+ (save-selected-window
+ (if window
+ (select-window window))
+ (one-window-p t)))
+ window-handled)
+
+ (save-selected-window
+ (if window
+ (select-window window))
+ (or (window-minibuffer-p)
+ (window-dedicated-p (selected-window))
+ (switch-to-buffer (other-buffer))))
+
+ ;; Get rid of the frame, if it has just one dedicated window
+ ;; and other visible frames exist.
+ (and (or (window-minibuffer-p) (window-dedicated-p window))
+ (delq frame (visible-frame-list))
+ window-solitary
+ (if (and (eq default-minibuffer-frame frame)
+ (= 1 (length (minibuffer-frame-list))))
+ (setq window nil)
+ (delete-frame frame)
+ (setq window-handled t)))
+
+ ;; Deal with the buffer.
+ (if kill
+ (kill-buffer buffer)
+ (bury-buffer buffer))
+
+ ;; Maybe get rid of the window.
+ (and window (not window-handled) (not window-solitary)
+ (delete-window window))))
+
(define-key ctl-x-map "2" 'split-window-vertically)
(define-key ctl-x-map "3" 'split-window-horizontally)
(define-key ctl-x-map "}" 'enlarge-window-horizontally)