Commit 614b38a9 authored by Eli Zaretskii's avatar Eli Zaretskii
Browse files

(bw-get-tree, bw-get-tree-1, bw-find-tree-sub)

(bw-find-tree-sub-1, bw-l, bw-t, bw-r, bw-b, bw-dir, bw-eqdir)
(bw-refresh-edges, bw-adjust-window, bw-balance-sub): New functions.
(balance-windows): Rewrite using the above new functions.
parent a8514f71
2005-12-10 Lennart Borgman <lennart.borgman.073@student.lu.se>
* window.el (bw-get-tree, bw-get-tree-1, bw-find-tree-sub)
(bw-find-tree-sub-1, bw-l, bw-t, bw-r, bw-b, bw-dir, bw-eqdir)
(bw-refresh-edges, bw-adjust-window, bw-balance-sub): New functions.
(balance-windows): Rewrite using the above new functions.
2005-12-10 David Koppelman <koppel@ece.lsu.edu>
 
* hi-lock.el: (hi-lock-mode) Renamed from hi-lock-buffer-mode;
......
......@@ -228,75 +228,201 @@ If WINDOW is nil or omitted, it defaults to the currently selected window."
(or (= (nth 2 edges) (nth 2 (window-edges (previous-window))))
(= (nth 0 edges) (nth 0 (window-edges (next-window))))))))
(defun balance-windows ()
"Make all visible windows the same height (approximately)."
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; `balance-windows' subroutines using `window-tree'
;;; Translate from internal window tree format
(defun bw-get-tree (&optional window-or-frame)
"Get a window split tree in our format.
WINDOW-OR-FRAME must be nil, a frame, or a window. If it is nil,
then the whole window split tree for `selected-frame' is returned.
If it is a frame, then this is used instead. If it is a window,
then the smallest tree containing that window is returned."
(when window-or-frame
(unless (or (framep window-or-frame)
(windowp window-or-frame))
(error "Not a frame or window: %s" window-or-frame)))
(let ((subtree (bw-find-tree-sub window-or-frame)))
(if (integerp subtree)
nil
(bw-get-tree-1 subtree))))
(defun bw-get-tree-1 (split)
(if (windowp split)
split
(let ((dir (car split))
(edges (car (cdr split)))
(childs (cdr (cdr split))))
(list
(cons 'dir (if dir 'ver 'hor))
(cons 'b (nth 3 edges))
(cons 'r (nth 2 edges))
(cons 't (nth 1 edges))
(cons 'l (nth 0 edges))
(cons 'childs (mapcar #'bw-get-tree-1 childs))))))
(defun bw-find-tree-sub (window-or-frame &optional get-parent)
(let* ((window (when (windowp window-or-frame) window-or-frame))
(frame (when (windowp window) (window-frame window)))
(wt (car (window-tree frame))))
(when (< 1 (length (window-list frame 0)))
(if window
(bw-find-tree-sub-1 wt window get-parent)
wt))))
(defun bw-find-tree-sub-1 (tree win &optional get-parent)
(unless (windowp win) (error "Not a window: %s" win))
(if (memq win tree)
(if get-parent
get-parent
tree)
(let ((childs (cdr (cdr tree)))
child
subtree)
(while (and childs (not subtree))
(setq child (car childs))
(setq childs (cdr childs))
(when (and child (listp child))
(setq subtree (bw-find-tree-sub-1 child win get-parent))))
(if (integerp subtree)
(progn
(if (= 1 subtree)
tree
(1- subtree)))
subtree
))))
;;; Window or object edges
(defun bw-l(obj)
"Left edge of OBJ."
(if (windowp obj) (nth 0 (window-edges obj)) (cdr (assq 'l obj))))
(defun bw-t(obj)
"Top edge of OBJ."
(if (windowp obj) (nth 1 (window-edges obj)) (cdr (assq 't obj))))
(defun bw-r(obj)
"Right edge of OBJ."
(if (windowp obj) (nth 2 (window-edges obj)) (cdr (assq 'r obj))))
(defun bw-b(obj)
"Bottom edge of OBJ."
(if (windowp obj) (nth 3 (window-edges obj)) (cdr (assq 'b obj))))
;;; Split directions
(defun bw-dir(obj)
"Return window split tree direction if OBJ.
If OBJ is a window return 'both. If it is a window split tree
then return its direction."
(if (symbolp obj)
obj
(if (windowp obj)
'both
(let ((dir (cdr (assq 'dir obj))))
(unless (memq dir '(hor ver both))
(error "Can't find dir in %s" obj))
dir))))
(defun bw-eqdir(obj1 obj2)
"Return t if window split tree directions are equal.
OBJ1 and OBJ2 should be either windows or window split trees in
our format. The directions returned by `bw-dir' are compared and
t is returned if they are `eq' or one of them is 'both."
(let ((dir1 (bw-dir obj1))
(dir2 (bw-dir obj2)))
(or (eq dir1 dir2)
(eq dir1 'both)
(eq dir2 'both))))
;;; Building split tree
(defun bw-refresh-edges(obj)
"Refresh the edge information of OBJ and return OBJ."
(unless (windowp obj)
(let ((childs (cdr (assq 'childs obj)))
(ol 1000)
(ot 1000)
(or -1)
(ob -1))
(dolist (o childs)
(when (> ol (bw-l o)) (setq ol (bw-l o)))
(when (> ot (bw-t o)) (setq ot (bw-t o)))
(when (< or (bw-r o)) (setq or (bw-r o)))
(when (< ob (bw-b o)) (setq ob (bw-b o))))
(setq obj (delq 'l obj))
(setq obj (delq 't obj))
(setq obj (delq 'r obj))
(setq obj (delq 'b obj))
(add-to-list 'obj (cons 'l ol))
(add-to-list 'obj (cons 't ot))
(add-to-list 'obj (cons 'r or))
(add-to-list 'obj (cons 'b ob))
))
obj)
;;; Balance windows
(defun balance-windows(&optional window-or-frame)
"Make windows the same heights or widths in window split subtrees.
When called non-interactively WINDOW-OR-FRAME may be either a
window or a frame. It then balances the windows on the implied
frame. If the parameter is a window only the corresponding window
subtree is balanced."
(interactive)
(let ((count -1) levels newsizes level-size
;; Don't count the lines that are above the uppermost windows.
;; (These are the menu bar lines, if any.)
(mbl (nth 1 (window-edges (frame-first-window (selected-frame)))))
(last-window (previous-window (frame-first-window (selected-frame))))
;; Don't count the lines that are past the lowest main window.
total)
;; Bottom edge of last window determines what size we have to work with.
(setq total
(+ (window-height last-window)
(nth 1 (window-edges last-window))))
;; Find all the different vpos's at which windows start,
;; then count them. But ignore levels that differ by only 1.
(let (tops (prev-top -2))
(walk-windows (function (lambda (w)
(setq tops (cons (nth 1 (window-edges w))
tops))))
'nomini)
(setq tops (sort tops '<))
(while tops
(if (> (car tops) (1+ prev-top))
(setq prev-top (car tops)
count (1+ count)))
(setq levels (cons (cons (car tops) count) levels))
(setq tops (cdr tops)))
(setq count (1+ count)))
;; Subdivide the frame into desired number of vertical levels.
(setq level-size (/ (- total mbl) count))
(save-selected-window
;; Set up NEWSIZES to map windows to their desired sizes.
;; If a window ends at the bottom level, don't include
;; it in NEWSIZES. Those windows get the right sizes
;; by adjusting the ones above them.
(walk-windows (function
(lambda (w)
(let ((newtop (cdr (assq (nth 1 (window-edges w))
levels)))
(newbot (cdr (assq (+ (window-height w)
(nth 1 (window-edges w)))
levels))))
(if newbot
(setq newsizes
(cons (cons w (* level-size (- newbot newtop)))
newsizes))))))
'nomini)
;; Make walk-windows start with the topmost window.
(select-window (previous-window (frame-first-window (selected-frame))))
(let (done (count 0))
;; Give each window its precomputed size, or at least try.
;; Keep trying until they all get the intended sizes,
;; but not more than 3 times (to prevent infinite loop).
(while (and (not done) (< count 3))
(setq done t)
(setq count (1+ count))
(walk-windows (function (lambda (w)
(select-window w)
(let ((newsize (cdr (assq w newsizes))))
(when newsize
(enlarge-window (- newsize
(window-height))
nil)
(unless (= (window-height) newsize)
(setq done nil))))))
'nomini))))))
(let (
(wt (bw-get-tree window-or-frame))
(w)
(h)
(tried-sizes)
(last-sizes)
(windows (window-list nil 0))
(counter 0))
(when wt
(while (not (member last-sizes tried-sizes))
(when last-sizes (setq tried-sizes (cons last-sizes tried-sizes)))
(setq last-sizes (mapcar (lambda(w)
(window-edges w))
windows))
(when (eq 'hor (bw-dir wt))
(setq w (- (bw-r wt) (bw-l wt))))
(when (eq 'ver (bw-dir wt))
(setq h (- (bw-b wt) (bw-t wt))))
(bw-balance-sub wt w h)))))
(defun bw-adjust-window(window delta horizontal)
"Wrapper around `adjust-window-trailing-edge' with error checking.
Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function."
(condition-case err
(adjust-window-trailing-edge window delta horizontal)
(error
;;(message "adjust: %s" (error-message-string err))
)))
(defun bw-balance-sub(wt w h)
(setq wt (bw-refresh-edges wt))
(unless w (setq w (- (bw-r wt) (bw-l wt))))
(unless h (setq h (- (bw-b wt) (bw-t wt))))
(if (windowp wt)
(progn
(when w
(let ((dw (- w (- (bw-r wt) (bw-l wt)))))
(when (/= 0 dw)
(bw-adjust-window wt dw t))))
(when h
(let ((dh (- h (- (bw-b wt) (bw-t wt)))))
(when (/= 0 dh)
(bw-adjust-window wt dh nil)))))
(let* ((childs (cdr (assq 'childs wt)))
(lastchild (car (last childs)))
(cw (when w (/ w (if (bw-eqdir 'hor wt) (length childs) 1))))
(ch (when h (/ h (if (bw-eqdir 'ver wt) (length childs) 1)))))
(dolist (c childs)
(bw-balance-sub c cw ch)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; I think this should be the default; I think people will prefer it--rms.
(defcustom split-window-keep-point t
......
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