;;; 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."
"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.
(if window
(select-window window)
(setq window (selected-window)))
- (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))))))
- (params (frame-parameters))
- (mini (cdr (assq 'minibuffer params)))
- (edges (window-edges))
- text-height)
- (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)))))
- (let (result height)
- (setq result
- (compute-motion (point-min) '(0 . 0)
- (- (point-max)
- (if ignore-final-newline 1 0))
- (cons 0 (window-height))
- (window-width) nil
- window))
- ;; Get number of screen lines that the text needs.
- (setq text-height (+ 1 (nth 2 result)))
- ;; Shrink down to that, or as far as we can go.
- (if (> (window-height) (1+ text-height))
- (shrink-window (- (window-height)
- (max (1+ text-height) window-min-height))))))))))
+ (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."