(mouse-drag-mode-line-1): Extension of former

mouse-drag-mode-line that also drags the header line.
(mouse-drag-mode-line): Call it.
(mouse-drag-header-line): New.
(toplevel): Bind down-mouse-1 on header lines to
mouse-drage-header-line.

diff --git a/lisp/mouse.el b/lisp/mouse.el
index 46a187ffc54c309bd2eabf526e90f8f8c424d9ac..f59890c1913c90019ff50596fbe6742f52e9be18 100644 (file)
--- a/lisp/mouse.el
+++ b/lisp/mouse.el
@@ -197,9 +197,10 @@ This command must be bound to a mouse click."
        (split-window-horizontally
         (min (max new-width first-col) last-col))))))
 
-(defun mouse-drag-mode-line (start-event)
-  "Change the height of a window by dragging on the mode line."
-  (interactive "e")
+(defun mouse-drag-mode-line-1 (start-event mode-line-p)
+  "Change the height of a window by dragging on the mode or header line.
+START-EVENT is the starting mouse-event of the drag action.
+MODE-LINE-P non-nil means a mode line is dragged."
   ;; Give temporary modes such as isearch a chance to turn off.
   (run-hooks 'mouse-leave-buffer-hook)
   (let ((done nil)
@@ -222,6 +223,7 @@ This command must be bound to a mouse click."
        ;; move its modeline the minibuffer must be enlarged.
        (setq should-enlarge-minibuffer
              (and minibuffer
+                  mode-line-p
                   (not (one-window-p t))
                   (= (nth 1 (window-edges minibuffer))
                      (nth 3 (window-edges)))))
@@ -260,18 +262,26 @@ This command must be bound to a mouse click."
                       edges (window-edges)
                       top (nth 1 edges)
                       bot (nth 3 edges))
-                ;; scale back a move that would make the
-                ;; window too short.
-                (cond ((< (- y top -1) window-min-height)
-                       (setq y (+ top window-min-height -1))))
+                
                 ;; compute size change needed
-                (setq growth (- y bot -1)
-                      wconfig (current-window-configuration))
+                (cond (mode-line-p
+                       ;; Scale back a move that would make the
+                       ;; window too short.
+                       (when (< (- y top -1) window-min-height)
+                         (setq y (+ top window-min-height -1)))
+                       (setq growth (- y bot -1)))
+                      (t
+                       (when (< (- bot y -1) window-min-height)
+                         (setq y (- bot window-min-height -1)))
+                       (setq growth (- top y -1))))
+                (setq wconfig (current-window-configuration))
+                
                 ;; Check for an error case.
                 (if (and (/= growth 0)
                          (not minibuffer)
                          (one-window-p t))
                     (error "Attempt to resize sole window"))
+                
                 ;; grow/shrink minibuffer?
                 (if should-enlarge-minibuffer
                     (progn
@@ -290,7 +300,9 @@ This command must be bound to a mouse click."
                       (enlarge-window (- growth))
                       (select-window start-event-window))
                   ;; no.  grow/shrink the selected window
+                  (message "growth = %d" growth)
                   (enlarge-window growth))
+                
                 ;; if this window's growth caused another
                 ;; window to be deleted because it was too
                 ;; short, rescind the change.
@@ -303,8 +315,20 @@ This command must be bound to a mouse click."
                 ;; around it.
                 (if (or (/= start-nwindows (count-windows t))
                         (and (not should-enlarge-minibuffer)
+                             mode-line-p
                              (/= top (nth 1 (window-edges)))))
                     (set-window-configuration wconfig)))))))))
+
+(defun mouse-drag-mode-line (start-event)
+  "Change the height of a window by dragging on the mode line."
+  (interactive "e")
+  (mouse-drag-mode-line-1 start-event t))
+
+(defun mouse-drag-header-line (start-event)
+  "Change the height of a window by dragging on the header line."
+  (interactive "e")
+  (mouse-drag-mode-line-1 start-event nil))
+
 \f
 (defun mouse-drag-vertical-line (start-event)
   "Change the width of a window by dragging on the vertical line."
@@ -2015,6 +2039,7 @@ and selects that window."
 (global-set-key [mode-line mouse-1] 'mouse-select-window)
 (global-set-key [mode-line drag-mouse-1] 'mouse-select-window)
 (global-set-key [mode-line down-mouse-1] 'mouse-drag-mode-line)
+(global-set-key [header-line down-mouse-1] 'mouse-drag-header-line)
 (global-set-key [mode-line mouse-2] 'mouse-delete-other-windows)
 (global-set-key [mode-line mouse-3] 'mouse-delete-window)
 (global-set-key [mode-line C-mouse-2] 'mouse-split-window-horizontally)