lisp/term/sup-mouse.el

   1 ;;; sup-mouse.el --- supdup mouse support for lisp machines
   2
   3 ;; Author: Wolfgang Rupprecht
   4 ;; Maintainer: FSF
   5 ;; Created: 21 Nov 1986
   6 ;; Last-Modified: 16 Mar 1992
   7 ;; Keywords: hardware
   8
   9 ;;     (from code originally written by John Robinson@bbn for the bitgraph)
  10
  11 ;; Copyright (C) Free Software Foundation 1985, 1986
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software; you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation; either version 2, or (at your option)
  18 ;; any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  27 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  28
  29 ;;; Code:
  30
  31 ;;;  User customization option:
  32
  33 (defvar sup-mouse-fast-select-window nil
  34   "*Non-nil for mouse hits to select new window, then execute; else just select.")
  35
  36 (defconst mouse-left 0)
  37 (defconst mouse-center 1)
  38 (defconst mouse-right 2)
  39
  40 (defconst mouse-2left 4)
  41 (defconst mouse-2center 5)
  42 (defconst mouse-2right 6)
  43
  44 (defconst mouse-3left 8)
  45 (defconst mouse-3center 9)
  46 (defconst mouse-3right 10)
  47
  48 ;;;  Defuns:
  49
  50 (defun sup-mouse-report ()
  51   "This function is called directly by the mouse, it parses and
  52 executes the mouse commands.
  53
  54  L move point          *  |---- These apply for mouse click in a window.
  55 2L delete word            |
  56 3L copy word              | If sup-mouse-fast-select-window is nil,
  57  C move point and yank *  | just selects that window.
  58 2C yank pop               |
  59  R set mark            *  |
  60 2R delete region          |
  61 3R copy region            |
  62
  63 on modeline                 on \"scroll bar\"   in minibuffer
  64  L scroll-up                line to top         execute-extended-command
  65  C proportional goto-char   line to middle      mouse-help
  66  R scroll-down              line to bottom      eval-expression"
  67
  68   (interactive)
  69   (let*
  70 ;; expect a string of <esc>:<buttons>;<x-pos>;<y-pos>c
  71       ((buttons (sup-get-tty-num ?\;))
  72        (x (sup-get-tty-num ?\;))
  73        (y (sup-get-tty-num ?c))
  74        (window (sup-pos-to-window x y))
  75        (edges (window-edges window))
  76        (old-window (selected-window))
  77        (in-minibuf-p (eq y (1- (frame-height))))
  78        (same-window-p (and (not in-minibuf-p) (eq window old-window)))
  79        (in-modeline-p (eq y (1- (nth 3 edges))))
  80        (in-scrollbar-p (>= x (1- (nth 2 edges)))))
  81     (setq x (- x (nth 0 edges)))
  82     (setq y (- y (nth 1 edges)))
  83
  84 ;    (error "mouse-hit %d %d %d" buttons x y) ;;;; debug
  85
  86     (cond (in-modeline-p
  87            (select-window window)
  88            (cond ((= buttons mouse-left)
  89                   (scroll-up))
  90                  ((= buttons mouse-right)
  91                   (scroll-down))
  92                  ((= buttons mouse-center)
  93                   (goto-char (/ (* x
  94                                    (- (point-max) (point-min)))
  95                                 (1- (window-width))))
  96                   (beginning-of-line)
  97                   (what-cursor-position)))
  98            (select-window old-window))
  99           (in-scrollbar-p
 100            (select-window window)
 101            (scroll-up
 102             (cond ((= buttons mouse-left)
 103                    y)
 104                   ((= buttons mouse-right)
 105                    (+ y (- 2 (window-height))))
 106                   ((= buttons mouse-center)
 107                    (/ (+ 2 y y (- (window-height))) 2))
 108                   (t
 109                    0)))
 110            (select-window old-window))
 111           (same-window-p
 112            (cond ((= buttons mouse-left)
 113                   (sup-move-point-to-x-y x y))
 114                  ((= buttons mouse-2left)
 115                   (sup-move-point-to-x-y x y)
 116                   (kill-word 1))
 117                  ((= buttons mouse-3left)
 118                   (sup-move-point-to-x-y x y)
 119                   (save-excursion
 120                     (copy-region-as-kill
 121                      (point) (progn (forward-word 1) (point))))
 122                   (setq this-command 'yank)
 123                   )
 124                  ((= buttons mouse-right)
 125                   (push-mark)
 126                   (sup-move-point-to-x-y x y)
 127                   (exchange-point-and-mark))
 128                  ((= buttons mouse-2right)
 129                   (push-mark)
 130                   (sup-move-point-to-x-y x y)
 131                   (kill-region (mark) (point)))
 132                  ((= buttons mouse-3right)
 133                   (push-mark)
 134                   (sup-move-point-to-x-y x y)
 135                   (copy-region-as-kill (mark) (point))
 136                   (setq this-command 'yank))
 137                  ((= buttons mouse-center)
 138                   (sup-move-point-to-x-y x y)
 139                   (setq this-command 'yank)
 140                   (yank))
 141                  ((= buttons mouse-2center)
 142                   (yank-pop 1))
 143                  )
 144            )
 145           (in-minibuf-p
 146            (cond ((= buttons mouse-right)
 147                   (call-interactively 'eval-expression))
 148                  ((= buttons mouse-left)
 149                   (call-interactively 'execute-extended-command))
 150                  ((= buttons mouse-center)
 151                   (describe-function 'sup-mouse-report)); silly self help
 152                  ))
 153           (t                            ;in another window
 154            (select-window window)
 155            (cond ((not sup-mouse-fast-select-window))
 156                  ((= buttons mouse-left)
 157                   (sup-move-point-to-x-y x y))
 158                  ((= buttons mouse-right)
 159                   (push-mark)
 160                   (sup-move-point-to-x-y x y)
 161                   (exchange-point-and-mark))
 162                  ((= buttons mouse-center)
 163                   (sup-move-point-to-x-y x y)
 164                   (setq this-command 'yank)
 165                   (yank))
 166                  ))
 167           )))
 168 \f
 169
 170 (defun sup-get-tty-num (term-char)
 171   "Read from terminal until TERM-CHAR is read, and return intervening number.
 172 Upon non-numeric not matching TERM-CHAR signal an error."
 173   (let
 174       ((num 0)
 175        (char (read-char)))
 176     (while (and (>= char ?0)
 177                 (<= char ?9))
 178       (setq num (+ (* num 10) (- char ?0)))
 179       (setq char (read-char)))
 180     (or (eq term-char char)
 181         (error "Invalid data format in mouse command"))
 182     num))
 183
 184 (defun sup-move-point-to-x-y (x y)
 185   "Position cursor in window coordinates.
 186 X and Y are 0-based character positions in the window."
 187   (move-to-window-line y)
 188   (move-to-column x)
 189   )
 190
 191 (defun sup-pos-to-window (x y)
 192   "Find window corresponding to frame coordinates.
 193 X and Y are 0-based character positions on the frame."
 194   (let ((edges (window-edges))
 195         (window nil))
 196     (while (and (not (eq window (selected-window)))
 197                 (or (<  y (nth 1 edges))
 198                     (>= y (nth 3 edges))
 199                     (<  x (nth 0 edges))
 200                     (>= x (nth 2 edges))))
 201       (setq window (next-window window))
 202       (setq edges (window-edges window))
 203       )
 204     (or window (selected-window))
 205     )
 206   )
 207
 208 ;;; sup-mouse.el ends here