mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-14 09:39:42 +00:00
ca7b6a4451
* lisp/international/quail.el, lisp/language/ind-util.el: * lisp/language/indian.el, lisp/mail/smtpmail.el, lisp/mwheel.el: * lisp/obsolete/longlines.el, lisp/progmodes/idlw-complete-structtag.el: * lisp/progmodes/idlw-help.el, lisp/progmodes/idlw-shell.el: * lisp/progmodes/idlw-toolbar.el, lisp/progmodes/idlwave.el: * lisp/progmodes/simula.el, lisp/ps-print.el, lisp/ps-samp.el: Remove Maintainer: lines for maintainers who have retired.
342 lines
13 KiB
EmacsLisp
342 lines
13 KiB
EmacsLisp
;;; mwheel.el --- Wheel mouse support
|
|
|
|
;; Copyright (C) 1998, 2000-2019 Free Software Foundation, Inc.
|
|
;; Keywords: mouse
|
|
;; Package: emacs
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs is free software: you can redistribute it and/or modify
|
|
;; it under the terms of the GNU General Public License as published by
|
|
;; the Free Software Foundation, either version 3 of the License, or
|
|
;; (at your option) any later version.
|
|
|
|
;; GNU Emacs is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;; GNU General Public License for more details.
|
|
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This code will enable the use of the infamous 'wheel' on the new
|
|
;; crop of mice. Under XFree86 and the XSuSE X Servers, the wheel
|
|
;; events are sent as button4/button5 events.
|
|
|
|
;; I for one would prefer some way of converting the button4/button5
|
|
;; events into different event types, like 'mwheel-up' or
|
|
;; 'mwheel-down', but I cannot find a way to do this very easily (or
|
|
;; portably), so for now I just live with it.
|
|
|
|
;; To enable this code, simply put this at the top of your .emacs
|
|
;; file:
|
|
;;
|
|
;; (mouse-wheel-mode 1)
|
|
|
|
;;; Code:
|
|
|
|
(require 'custom)
|
|
(require 'timer)
|
|
|
|
(defvar mouse-wheel-mode)
|
|
|
|
;; Setter function for mouse-button user-options. Switch Mouse Wheel
|
|
;; mode off and on again so that the old button is unbound and
|
|
;; new button is bound to mwheel-scroll.
|
|
|
|
(defun mouse-wheel-change-button (var button)
|
|
(set-default var button)
|
|
;; Sync the bindings.
|
|
(when (bound-and-true-p mouse-wheel-mode) (mouse-wheel-mode 1)))
|
|
|
|
(defcustom mouse-wheel-down-event
|
|
(if (or (featurep 'w32-win) (featurep 'ns-win))
|
|
'wheel-up
|
|
'mouse-4)
|
|
"Event used for scrolling down."
|
|
:group 'mouse
|
|
:type 'symbol
|
|
:set 'mouse-wheel-change-button)
|
|
|
|
(defcustom mouse-wheel-up-event
|
|
(if (or (featurep 'w32-win) (featurep 'ns-win))
|
|
'wheel-down
|
|
'mouse-5)
|
|
"Event used for scrolling up."
|
|
:group 'mouse
|
|
:type 'symbol
|
|
:set 'mouse-wheel-change-button)
|
|
|
|
(defcustom mouse-wheel-click-event 'mouse-2
|
|
"Event that should be temporarily inhibited after mouse scrolling.
|
|
The mouse wheel is typically on the mouse-2 button, so it may easily
|
|
happen that text is accidentally yanked into the buffer when
|
|
scrolling with the mouse wheel. To prevent that, this variable can be
|
|
set to the event sent when clicking on the mouse wheel button."
|
|
:group 'mouse
|
|
:type 'symbol
|
|
:set 'mouse-wheel-change-button)
|
|
|
|
(defcustom mouse-wheel-inhibit-click-time 0.35
|
|
"Time in seconds to inhibit clicking on mouse wheel button after scroll."
|
|
:group 'mouse
|
|
:type 'number)
|
|
|
|
(defcustom mouse-wheel-scroll-amount '(5 ((shift) . 1) ((control) . nil))
|
|
"Amount to scroll windows by when spinning the mouse wheel.
|
|
This is an alist mapping the modifier key to the amount to scroll when
|
|
the wheel is moved with the modifier key depressed.
|
|
Elements of the list have the form (MODIFIERS . AMOUNT) or just AMOUNT if
|
|
MODIFIERS is nil.
|
|
|
|
AMOUNT should be the number of lines to scroll, or nil for near full
|
|
screen. It can also be a floating point number, specifying the fraction of
|
|
a full screen to scroll. A near full screen is `next-screen-context-lines'
|
|
less than a full screen."
|
|
:group 'mouse
|
|
:type '(cons
|
|
(choice :tag "Normal"
|
|
(const :tag "Full screen" :value nil)
|
|
(integer :tag "Specific # of lines")
|
|
(float :tag "Fraction of window")
|
|
(cons
|
|
(repeat (choice :tag "modifier"
|
|
(const alt) (const control) (const hyper)
|
|
(const meta) (const shift) (const super)))
|
|
(choice :tag "scroll amount"
|
|
(const :tag "Full screen" :value nil)
|
|
(integer :tag "Specific # of lines")
|
|
(float :tag "Fraction of window"))))
|
|
(repeat
|
|
(cons
|
|
(repeat (choice :tag "modifier"
|
|
(const alt) (const control) (const hyper)
|
|
(const meta) (const shift) (const super)))
|
|
(choice :tag "scroll amount"
|
|
(const :tag "Full screen" :value nil)
|
|
(integer :tag "Specific # of lines")
|
|
(float :tag "Fraction of window")))))
|
|
:set 'mouse-wheel-change-button)
|
|
|
|
(defcustom mouse-wheel-progressive-speed t
|
|
"If non-nil, the faster the user moves the wheel, the faster the scrolling.
|
|
Note that this has no effect when `mouse-wheel-scroll-amount' specifies
|
|
a \"near full screen\" scroll or when the mouse wheel sends key instead
|
|
of button events."
|
|
:group 'mouse
|
|
:type 'boolean)
|
|
|
|
(defcustom mouse-wheel-follow-mouse t
|
|
"Whether the mouse wheel should scroll the window that the mouse is over.
|
|
This can be slightly disconcerting, but some people prefer it."
|
|
:group 'mouse
|
|
:type 'boolean)
|
|
|
|
;;; For tilt-scroll
|
|
;;;
|
|
(defcustom mouse-wheel-tilt-scroll nil
|
|
"Enable scroll using tilting mouse wheel."
|
|
:group 'mouse
|
|
:type 'boolean
|
|
:version "26.1")
|
|
|
|
(defcustom mouse-wheel-flip-direction nil
|
|
"Swap direction of 'wheel-right and 'wheel-left."
|
|
:group 'mouse
|
|
:type 'boolean
|
|
:version "26.1")
|
|
|
|
(eval-and-compile
|
|
(if (fboundp 'event-button)
|
|
(fset 'mwheel-event-button 'event-button)
|
|
(defun mwheel-event-button (event)
|
|
(let ((x (event-basic-type event)))
|
|
;; Map mouse-wheel events to appropriate buttons
|
|
(if (eq 'mouse-wheel x)
|
|
(let ((amount (car (cdr (cdr (cdr event))))))
|
|
(if (< amount 0)
|
|
mouse-wheel-up-event
|
|
mouse-wheel-down-event))
|
|
x))))
|
|
|
|
(if (fboundp 'event-window)
|
|
(fset 'mwheel-event-window 'event-window)
|
|
(defun mwheel-event-window (event)
|
|
(posn-window (event-start event)))))
|
|
|
|
(defvar mwheel-inhibit-click-event-timer nil
|
|
"Timer running while mouse wheel click event is inhibited.")
|
|
|
|
(defun mwheel-inhibit-click-timeout ()
|
|
"Handler for `mwheel-inhibit-click-event-timer'."
|
|
(setq mwheel-inhibit-click-event-timer nil)
|
|
(remove-hook 'pre-command-hook 'mwheel-filter-click-events))
|
|
|
|
(defun mwheel-filter-click-events ()
|
|
"Discard `mouse-wheel-click-event' while scrolling the mouse."
|
|
(if (eq (event-basic-type last-input-event) mouse-wheel-click-event)
|
|
(setq this-command 'ignore)))
|
|
|
|
(defvar mwheel-scroll-up-function 'scroll-up
|
|
"Function that does the job of scrolling upward.")
|
|
|
|
(defvar mwheel-scroll-down-function 'scroll-down
|
|
"Function that does the job of scrolling downward.")
|
|
|
|
(defvar mwheel-scroll-left-function 'scroll-left
|
|
"Function that does the job of scrolling left.")
|
|
|
|
(defvar mwheel-scroll-right-function 'scroll-right
|
|
"Function that does the job of scrolling right.")
|
|
|
|
(defvar mouse-wheel-left-event
|
|
(if (or (featurep 'w32-win) (featurep 'ns-win))
|
|
'wheel-left
|
|
(intern "mouse-6"))
|
|
"Event used for scrolling left.")
|
|
|
|
(defvar mouse-wheel-right-event
|
|
(if (or (featurep 'w32-win) (featurep 'ns-win))
|
|
'wheel-right
|
|
(intern "mouse-7"))
|
|
"Event used for scrolling right.")
|
|
|
|
(defun mwheel-scroll (event)
|
|
"Scroll up or down according to the EVENT.
|
|
This should be bound only to mouse buttons 4, 5, 6, and 7 on
|
|
non-Windows systems."
|
|
(interactive (list last-input-event))
|
|
(let* ((selected-window (selected-window))
|
|
(scroll-window
|
|
(or (catch 'found
|
|
(let* ((window (if mouse-wheel-follow-mouse
|
|
(mwheel-event-window event)
|
|
(selected-window)))
|
|
(frame (when (window-live-p window)
|
|
(frame-parameter
|
|
(window-frame window) 'mouse-wheel-frame))))
|
|
(when (frame-live-p frame)
|
|
(let* ((pos (mouse-absolute-pixel-position))
|
|
(pos-x (car pos))
|
|
(pos-y (cdr pos)))
|
|
(walk-window-tree
|
|
(lambda (window-1)
|
|
(let ((edges (window-edges window-1 nil t t)))
|
|
(when (and (<= (nth 0 edges) pos-x)
|
|
(<= pos-x (nth 2 edges))
|
|
(<= (nth 1 edges) pos-y)
|
|
(<= pos-y (nth 3 edges)))
|
|
(throw 'found window-1))))
|
|
frame nil t)))))
|
|
(mwheel-event-window event)))
|
|
(old-point
|
|
(and (eq scroll-window selected-window)
|
|
(eq (car-safe transient-mark-mode) 'only)
|
|
(window-point)))
|
|
(mods
|
|
(delq 'click (delq 'double (delq 'triple (event-modifiers event)))))
|
|
(amt (assoc mods mouse-wheel-scroll-amount)))
|
|
(unless (eq scroll-window selected-window)
|
|
;; Mark window to be scrolled for redisplay.
|
|
(select-window scroll-window 'mark-for-redisplay))
|
|
;; Extract the actual amount or find the element that has no modifiers.
|
|
(if amt (setq amt (cdr amt))
|
|
(let ((list-elt mouse-wheel-scroll-amount))
|
|
(while (consp (setq amt (pop list-elt))))))
|
|
(if (floatp amt) (setq amt (1+ (truncate (* amt (window-height))))))
|
|
(when (and mouse-wheel-progressive-speed (numberp amt))
|
|
;; When the double-mouse-N comes in, a mouse-N has been executed already,
|
|
;; So by adding things up we get a squaring up (1, 3, 6, 10, 15, ...).
|
|
(setq amt (* amt (event-click-count event))))
|
|
(when (numberp amt) (setq amt (* amt (event-line-count event))))
|
|
(unwind-protect
|
|
(let ((button (mwheel-event-button event)))
|
|
(cond ((eq button mouse-wheel-down-event)
|
|
(condition-case nil (funcall mwheel-scroll-down-function amt)
|
|
;; Make sure we do indeed scroll to the beginning of
|
|
;; the buffer.
|
|
(beginning-of-buffer
|
|
(unwind-protect
|
|
(funcall mwheel-scroll-down-function)
|
|
;; If the first scroll succeeded, then some scrolling
|
|
;; is possible: keep scrolling til the beginning but
|
|
;; do not signal an error. For some reason, we have
|
|
;; to do it even if the first scroll signaled an
|
|
;; error, because otherwise the window is recentered
|
|
;; for a reason that escapes me. This problem seems
|
|
;; to only affect scroll-down. --Stef
|
|
(set-window-start (selected-window) (point-min))))))
|
|
((eq button mouse-wheel-up-event)
|
|
(condition-case nil (funcall mwheel-scroll-up-function amt)
|
|
;; Make sure we do indeed scroll to the end of the buffer.
|
|
(end-of-buffer (while t (funcall mwheel-scroll-up-function)))))
|
|
((eq button mouse-wheel-left-event) ; for tilt scroll
|
|
(when mouse-wheel-tilt-scroll
|
|
(funcall (if mouse-wheel-flip-direction
|
|
mwheel-scroll-right-function
|
|
mwheel-scroll-left-function) amt)))
|
|
((eq button mouse-wheel-right-event) ; for tilt scroll
|
|
(when mouse-wheel-tilt-scroll
|
|
(funcall (if mouse-wheel-flip-direction
|
|
mwheel-scroll-left-function
|
|
mwheel-scroll-right-function) amt)))
|
|
(t (error "Bad binding in mwheel-scroll"))))
|
|
(if (eq scroll-window selected-window)
|
|
;; If there is a temporarily active region, deactivate it if
|
|
;; scrolling moved point.
|
|
(when (and old-point (/= old-point (window-point)))
|
|
;; Call `deactivate-mark' at the original position, so that
|
|
;; the original region is saved to the X selection.
|
|
(let ((new-point (window-point)))
|
|
(goto-char old-point)
|
|
(deactivate-mark)
|
|
(goto-char new-point)))
|
|
(select-window selected-window t))))
|
|
|
|
(when (and mouse-wheel-click-event mouse-wheel-inhibit-click-time)
|
|
(if mwheel-inhibit-click-event-timer
|
|
(cancel-timer mwheel-inhibit-click-event-timer)
|
|
(add-hook 'pre-command-hook 'mwheel-filter-click-events))
|
|
(setq mwheel-inhibit-click-event-timer
|
|
(run-with-timer mouse-wheel-inhibit-click-time nil
|
|
'mwheel-inhibit-click-timeout))))
|
|
|
|
(put 'mwheel-scroll 'scroll-command t)
|
|
|
|
(defvar mwheel-installed-bindings nil)
|
|
|
|
(define-minor-mode mouse-wheel-mode
|
|
"Toggle mouse wheel support (Mouse Wheel mode)."
|
|
:init-value t
|
|
;; We'd like to use custom-initialize-set here so the setup is done
|
|
;; before dumping, but at the point where the defcustom is evaluated,
|
|
;; the corresponding function isn't defined yet, so
|
|
;; custom-initialize-set signals an error.
|
|
:initialize 'custom-initialize-delay
|
|
:global t
|
|
:group 'mouse
|
|
;; Remove previous bindings, if any.
|
|
(while mwheel-installed-bindings
|
|
(let ((key (pop mwheel-installed-bindings)))
|
|
(when (eq (lookup-key (current-global-map) key) 'mwheel-scroll)
|
|
(global-unset-key key))))
|
|
;; Setup bindings as needed.
|
|
(when mouse-wheel-mode
|
|
(dolist (event (list mouse-wheel-down-event mouse-wheel-up-event mouse-wheel-right-event mouse-wheel-left-event))
|
|
(dolist (key (mapcar (lambda (amt) `[(,@(if (consp amt) (car amt)) ,event)])
|
|
mouse-wheel-scroll-amount))
|
|
(global-set-key key 'mwheel-scroll)
|
|
(push key mwheel-installed-bindings)))))
|
|
|
|
;;; Compatibility entry point
|
|
;; preloaded ;;;###autoload
|
|
(defun mwheel-install (&optional uninstall)
|
|
"Enable mouse wheel support."
|
|
(mouse-wheel-mode (if uninstall -1 1)))
|
|
|
|
(provide 'mwheel)
|
|
|
|
;;; mwheel.el ends here
|