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;; Mouse support for X window system.
;; Copyright (C) 1985, 1987 Free Software Foundation, Inc.
;; 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 1, 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; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
(provide 'x-mouse)
(defconst x-button-right (char-to-string 0))
(defconst x-button-middle (char-to-string 1))
(defconst x-button-left (char-to-string 2))
(defconst x-button-right-up (char-to-string 4))
(defconst x-button-middle-up (char-to-string 5))
(defconst x-button-left-up (char-to-string 6))
(defconst x-button-s-right (char-to-string 16))
(defconst x-button-s-middle (char-to-string 17))
(defconst x-button-s-left (char-to-string 18))
(defconst x-button-s-right-up (char-to-string 20))
(defconst x-button-s-middle-up (char-to-string 21))
(defconst x-button-s-left-up (char-to-string 22))
(defconst x-button-m-right (char-to-string 32))
(defconst x-button-m-middle (char-to-string 33))
(defconst x-button-m-left (char-to-string 34))
(defconst x-button-m-right-up (char-to-string 36))
(defconst x-button-m-middle-up (char-to-string 37))
(defconst x-button-m-left-up (char-to-string 38))
(defconst x-button-c-right (char-to-string 64))
(defconst x-button-c-middle (char-to-string 65))
(defconst x-button-c-left (char-to-string 66))
(defconst x-button-c-right-up (char-to-string 68))
(defconst x-button-c-middle-up (char-to-string 69))
(defconst x-button-c-left-up (char-to-string 70))
(defconst x-button-m-s-right (char-to-string 48))
(defconst x-button-m-s-middle (char-to-string 49))
(defconst x-button-m-s-left (char-to-string 50))
(defconst x-button-m-s-right-up (char-to-string 52))
(defconst x-button-m-s-middle-up (char-to-string 53))
(defconst x-button-m-s-left-up (char-to-string 54))
(defconst x-button-c-s-right (char-to-string 80))
(defconst x-button-c-s-middle (char-to-string 81))
(defconst x-button-c-s-left (char-to-string 82))
(defconst x-button-c-s-right-up (char-to-string 84))
(defconst x-button-c-s-middle-up (char-to-string 85))
(defconst x-button-c-s-left-up (char-to-string 86))
(defconst x-button-c-m-right (char-to-string 96))
(defconst x-button-c-m-middle (char-to-string 97))
(defconst x-button-c-m-left (char-to-string 98))
(defconst x-button-c-m-right-up (char-to-string 100))
(defconst x-button-c-m-middle-up (char-to-string 101))
(defconst x-button-c-m-left-up (char-to-string 102))
(defconst x-button-c-m-s-right (char-to-string 112))
(defconst x-button-c-m-s-middle (char-to-string 113))
(defconst x-button-c-m-s-left (char-to-string 114))
(defconst x-button-c-m-s-right-up (char-to-string 116))
(defconst x-button-c-m-s-middle-up (char-to-string 117))
(defconst x-button-c-m-s-left-up (char-to-string 118))
(defvar x-process-mouse-hook nil
"Hook to run after each mouse event is processed. Should take two
arguments; the first being a list (XPOS YPOS) corresponding to character
offset from top left of screen and the second being a specifier for the
buttons/keys.
This will normally be set on a per-buffer basis.")
(defun x-flush-mouse-queue ()
"Process all queued mouse events."
;; A mouse event causes a special character sequence to be given
;; as keyboard input. That runs this function, which process all
;; queued mouse events and returns.
(interactive)
(while (> (x-mouse-events) 0)
(x-proc-mouse-event)
(and (boundp 'x-process-mouse-hook)
(symbol-value 'x-process-mouse-hook)
(funcall x-process-mouse-hook x-mouse-pos x-mouse-item))))
(define-key global-map "\C-c\C-m" 'x-flush-mouse-queue)
(define-key global-map "\C-x\C-@" 'x-flush-mouse-queue)
(defun x-mouse-select (arg)
"Select Emacs window the mouse is on."
(let ((start-w (selected-window))
(done nil)
(w (selected-window))
(rel-coordinate nil))
(while (and (not done)
(null (setq rel-coordinate
(coordinates-in-window-p arg w))))
(setq w (next-window w))
(if (eq w start-w)
(setq done t)))
(select-window w)
rel-coordinate))
(defun x-mouse-keep-one-window (arg)
"Select Emacs window mouse is on, then kill all other Emacs windows."
(if (x-mouse-select arg)
(delete-other-windows)))
(defun x-mouse-select-and-split (arg)
"Select Emacs window mouse is on, then split it vertically in half."
(if (x-mouse-select arg)
(split-window-vertically nil)))
(defun x-mouse-set-point (arg)
"Select Emacs window mouse is on, and move point to mouse position."
(let* ((relative-coordinate (x-mouse-select arg))
margin-column
(rel-x (car relative-coordinate))
(rel-y (car (cdr relative-coordinate))))
(if relative-coordinate
(let ((prompt-width (if (eq (selected-window) (minibuffer-window))
minibuffer-prompt-width 0)))
(move-to-window-line rel-y)
(if (eobp)
;; If text ends before the desired line,
;; always position at end of that line.
nil
(setq margin-column
(if (or truncate-lines (> (window-hscroll) 0))
(current-column)
;; If we are using line continuation,
;; compensate if first character on a continuation line
;; does not start precisely at the margin.
(- (current-column)
(% (current-column) (1- (window-width))))))
(move-to-column (+ rel-x (1- (max 1 (window-hscroll)))
(if (= (point) 1)
(- prompt-width) 0)
margin-column)))))))
(defun x-mouse-set-mark (arg)
"Select Emacs window mouse is on, and set mark at mouse position.
Display cursor at that position for a second."
(if (x-mouse-select arg)
(let ((point-save (point)))
(unwind-protect
(progn (x-mouse-set-point arg)
(push-mark nil t)
(sit-for 1))
(goto-char point-save)))))
(defun x-cut-text (arg &optional kill)
"Copy text between point and mouse position into window system cut buffer.
Save in Emacs kill ring also."
(if (coordinates-in-window-p arg (selected-window))
(save-excursion
(let ((opoint (point))
beg end)
(x-mouse-set-point arg)
(setq beg (min opoint (point))
end (max opoint (point)))
(x-store-cut-buffer (buffer-substring beg end))
(copy-region-as-kill beg end)
(if kill (delete-region beg end))))
(message "Mouse not in selected window")))
(defun x-paste-text (arg)
"Move point to mouse position and insert window system cut buffer contents."
(x-mouse-set-point arg)
(insert (x-get-cut-buffer)))
(defun x-cut-and-wipe-text (arg)
"Kill text between point and mouse; also copy to window system cut buffer."
(x-cut-text arg t))
(defun x-mouse-ignore (arg)
"Don't do anything.")
(defun x-buffer-menu (arg)
"Pop up a menu of buffers for selection with the mouse."
(let ((menu
(list "Buffer Menu"
(cons "Select Buffer"
(let ((tail (buffer-list))
head)
(while tail
(let ((elt (car tail)))
(if (not (string-match "^ "
(buffer-name elt)))
(setq head (cons
(cons
(format
"%14s %s"
(buffer-name elt)
(or (buffer-file-name elt) ""))
elt)
head))))
(setq tail (cdr tail)))
(reverse head))))))
(switch-to-buffer (or (x-popup-menu arg menu) (current-buffer)))))
(defun x-help (arg)
"Enter a menu-based help system."
(let ((selection
(x-popup-menu
arg
'("Help" ("Is there a command that..."
("Command apropos" . command-apropos)
("Apropos" . apropos))
("Key Commands <==> Functions"
("List all keystroke commands" . describe-bindings)
("Describe key briefly" . describe-key-briefly)
("Describe key verbose" . describe-key)
("Describe Lisp function" . describe-function)
("Where is this command" . where-is))
("Manual and tutorial"
("Info system" . info)
("Invoke Emacs tutorial" . help-with-tutorial))
("Odds and ends"
("Last 100 Keystrokes" . view-lossage)
("Describe syntax table" . describe-syntax))
("Modes"
("Describe current major mode" . describe-mode)
("List all keystroke commands" . describe-bindings))
("Administrivia"
("View Emacs news" . view-emacs-news)
("View the GNU Emacs license" . describe-copying)
("Describe distribution" . describe-distribution)
("Describe (non)warranty" . describe-no-warranty))))))
(and selection (call-interactively selection))))
; Prevent beeps on button-up. If the button isn't bound to anything, it
; will beep on button-down.
(define-key mouse-map x-button-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-s-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-s-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-s-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-m-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-m-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-m-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-m-s-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-m-s-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-m-s-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-s-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-s-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-s-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-m-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-m-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-m-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-m-s-right-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-m-s-middle-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-m-s-left-up 'x-mouse-ignore)
(define-key mouse-map x-button-c-s-left 'x-buffer-menu)
(define-key mouse-map x-button-c-s-middle 'x-help)
(define-key mouse-map x-button-c-s-right 'x-mouse-keep-one-window)
(define-key mouse-map x-button-s-middle 'x-cut-text)
(define-key mouse-map x-button-s-right 'x-paste-text)
(define-key mouse-map x-button-c-middle 'x-cut-and-wipe-text)
(define-key mouse-map x-button-c-right 'x-mouse-select-and-split)
(if (= window-system-version 10)
(progn
(define-key mouse-map x-button-right 'x-mouse-select)
(define-key mouse-map x-button-left 'x-mouse-set-mark)
(define-key mouse-map x-button-middle 'x-mouse-set-point))
(define-key mouse-map x-button-right 'x-cut-text)
(define-key mouse-map x-button-left 'x-mouse-set-point)
(define-key mouse-map x-button-middle 'x-paste-text))
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