;;; scroll-bar.el --- window system-independent scroll bar support
-;; Copyright (C) 1993, 1994, 1995, 1999, 2000, 2001, 2002, 2003,
-;; 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+;; Copyright (C) 1993-1995, 1999-2011 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: hardware
+;; Package: emacs
;; This file is part of GNU Emacs.
;;; Code:
(require 'mouse)
+(eval-when-compile (require 'cl))
\f
;;;; Utilities.
"Non-nil means `set-scroll-bar-mode' should really do something.
This is nil while loading `scroll-bar.el', and t afterward.")
-(defun set-scroll-bar-mode-1 (ignore value)
- (set-scroll-bar-mode value))
-
(defun set-scroll-bar-mode (value)
"Set `scroll-bar-mode' to VALUE and put the new value into effect."
(if scroll-bar-mode
;; The default value for :initialize would try to use :set
;; when processing the file in cus-dep.el.
:initialize 'custom-initialize-default
- :set 'set-scroll-bar-mode-1)
+ :set (lambda (sym val) (set-scroll-bar-mode val)))
;; We just set scroll-bar-mode, but that was the default.
;; If it is set again, that is for real.
(setq scroll-bar-mode-explicit t)
-(defun scroll-bar-mode (&optional flag)
+(defun get-scroll-bar-mode () scroll-bar-mode)
+(defsetf get-scroll-bar-mode set-scroll-bar-mode)
+(define-minor-mode scroll-bar-mode
"Toggle display of vertical scroll bars on all frames.
This command applies to all frames that exist and frames to be
created in the future.
With a numeric argument, if the argument is positive
turn on scroll bars; otherwise turn off scroll bars."
- (interactive "P")
-
- ;; Tweedle the variable according to the argument.
- (set-scroll-bar-mode (if (if (null flag)
- (not scroll-bar-mode)
- (setq flag (prefix-numeric-value flag))
- (or (not (numberp flag)) (> flag 0)))
- (or previous-scroll-bar-mode
- default-frame-scroll-bars))))
+ :variable (eq (get-scroll-bar-mode)
+ (or previous-scroll-bar-mode
+ default-frame-scroll-bars)))
(defun toggle-scroll-bar (arg)
"Toggle whether or not the selected frame has vertical scroll bars.
(let* ((start-position (event-start event))
(window (nth 0 start-position))
(portion-whole (nth 2 start-position)))
- (with-current-buffer (window-buffer window)
- ;; Calculate position relative to the accessible part of the buffer.
- (goto-char (+ (point-min)
- (scroll-bar-scale portion-whole
- (- (point-max) (point-min)))))
- (vertical-motion 0 window)
- (set-window-start window (point)))))
+ (save-excursion
+ (with-current-buffer (window-buffer window)
+ ;; Calculate position relative to the accessible part of the buffer.
+ (goto-char (+ (point-min)
+ (scroll-bar-scale portion-whole
+ (- (point-max) (point-min)))))
+ (vertical-motion 0 window)
+ (set-window-start window (point))))))
(defun scroll-bar-drag (event)
"Scroll the window by dragging the scroll bar slider.
\f
(provide 'scroll-bar)
-;; arch-tag: 6f1d01d0-0b1e-4bf8-86db-d491e0f399f3
;;; scroll-bar.el ends here