lisp/term/sup-mouse.el

   1 ;;; sup-mouse.el --- supdup mouse support for lisp machines
   2
   3 ;; Copyright (C) 1985-1986, 2001-2011 Free Software Foundation, Inc.
   4
   5 ;; Author: Wolfgang Rupprecht
   6 ;; Maintainer: FSF
   7 ;; Created: 21 Nov 1986
   8 ;; Keywords: hardware
   9
  10 ;;     (from code originally written by John Robinson@bbn for the bitgraph)
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software: you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation, either version 3 of the License, or
  17 ;; (at your option) any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28
  29 ;;; Code:
  30
  31 ;;;  User customization option:
  32
  33 (defcustom sup-mouse-fast-select-window nil
  34   "Non-nil means mouse hits select new window, then execute.
  35 Otherwise just select."
  36   :type 'boolean
  37   :group 'mouse)
  38
  39 (defconst mouse-left 0)
  40 (defconst mouse-center 1)
  41 (defconst mouse-right 2)
  42
  43 (defconst mouse-2left 4)
  44 (defconst mouse-2center 5)
  45 (defconst mouse-2right 6)
  46
  47 (defconst mouse-3left 8)
  48 (defconst mouse-3center 9)
  49 (defconst mouse-3right 10)
  50
  51 ;;;  Defuns:
  52
  53 (defun sup-mouse-report ()
  54   "This function is called directly by the mouse, it parses and
  55 executes the mouse commands.
  56
  57  L move point          *  |---- These apply for mouse click in a window.
  58 2L delete word            |
  59 3L copy word              | If sup-mouse-fast-select-window is nil,
  60  C move point and yank *  | just selects that window.
  61 2C yank pop               |
  62  R set mark            *  |
  63 2R delete region          |
  64 3R copy region            |
  65
  66 on modeline                 on \"scroll bar\"   in minibuffer
  67  L scroll-up                line to top         execute-extended-command
  68  C proportional goto-char   line to middle      mouse-help
  69  R scroll-down              line to bottom      eval-expression"
  70
  71   (interactive)
  72   (let*
  73 ;; expect a string of <esc>:<buttons>;<x-pos>;<y-pos>c
  74       ((buttons (sup-get-tty-num ?\;))
  75        (x (sup-get-tty-num ?\;))
  76        (y (sup-get-tty-num ?c))
  77        (window (sup-pos-to-window x y))
  78        (edges (window-edges window))
  79        (old-window (selected-window))
  80        (in-minibuf-p (eq y (1- (frame-height))))
  81        (same-window-p (and (not in-minibuf-p) (eq window old-window)))
  82        (in-modeline-p (eq y (1- (nth 3 edges))))
  83        (in-scrollbar-p (>= x (1- (nth 2 edges)))))
  84     (setq x (- x (nth 0 edges)))
  85     (setq y (- y (nth 1 edges)))
  86
  87 ;    (error "mouse-hit %d %d %d" buttons x y) ;;;; debug
  88
  89     (cond (in-modeline-p
  90            (select-window window)
  91            (cond ((= buttons mouse-left)
  92                   (scroll-up))
  93                  ((= buttons mouse-right)
  94                   (scroll-down))
  95                  ((= buttons mouse-center)
  96                   (goto-char (/ (* x
  97                                    (- (point-max) (point-min)))
  98                                 (1- (window-width))))
  99                   (beginning-of-line)
 100                   (what-cursor-position)))
 101            (select-window old-window))
 102           (in-scrollbar-p
 103            (select-window window)
 104            (scroll-up
 105             (cond ((= buttons mouse-left)
 106                    y)
 107                   ((= buttons mouse-right)
 108                    (+ y (- 2 (window-height))))
 109                   ((= buttons mouse-center)
 110                    (/ (+ 2 y y (- (window-height))) 2))
 111                   (t
 112                    0)))
 113            (select-window old-window))
 114           (same-window-p
 115            (cond ((= buttons mouse-left)
 116                   (sup-move-point-to-x-y x y))
 117                  ((= buttons mouse-2left)
 118                   (sup-move-point-to-x-y x y)
 119                   (kill-word 1))
 120                  ((= buttons mouse-3left)
 121                   (sup-move-point-to-x-y x y)
 122                   (save-excursion
 123                     (copy-region-as-kill
 124                      (point) (progn (forward-word 1) (point))))
 125                   (setq this-command 'yank)
 126                   )
 127                  ((= buttons mouse-right)
 128                   (push-mark)
 129                   (sup-move-point-to-x-y x y)
 130                   (exchange-point-and-mark))
 131                  ((= buttons mouse-2right)
 132                   (push-mark)
 133                   (sup-move-point-to-x-y x y)
 134                   (kill-region (mark) (point)))
 135                  ((= buttons mouse-3right)
 136                   (push-mark)
 137                   (sup-move-point-to-x-y x y)
 138                   (copy-region-as-kill (mark) (point))
 139                   (setq this-command 'yank))
 140                  ((= buttons mouse-center)
 141                   (sup-move-point-to-x-y x y)
 142                   (setq this-command 'yank)
 143                   (yank))
 144                  ((= buttons mouse-2center)
 145                   (yank-pop 1))
 146                  )
 147            )
 148           (in-minibuf-p
 149            (cond ((= buttons mouse-right)
 150                   (call-interactively 'eval-expression))
 151                  ((= buttons mouse-left)
 152                   (call-interactively 'execute-extended-command))
 153                  ((= buttons mouse-center)
 154                   (describe-function 'sup-mouse-report)); silly self help
 155                  ))
 156           (t                            ;in another window
 157            (select-window window)
 158            (cond ((not sup-mouse-fast-select-window))
 159                  ((= buttons mouse-left)
 160                   (sup-move-point-to-x-y x y))
 161                  ((= buttons mouse-right)
 162                   (push-mark)
 163                   (sup-move-point-to-x-y x y)
 164                   (exchange-point-and-mark))
 165                  ((= buttons mouse-center)
 166                   (sup-move-point-to-x-y x y)
 167                   (setq this-command 'yank)
 168                   (yank))
 169                  ))
 170           )))
 171 \f
 172
 173 (defun sup-get-tty-num (term-char)
 174   "Read from terminal until TERM-CHAR is read, and return intervening number.
 175 Upon non-numeric not matching TERM-CHAR signal an error."
 176   (let
 177       ((num 0)
 178        (char (read-char)))
 179     (while (and (>= char ?0)
 180                 (<= char ?9))
 181       (setq num (+ (* num 10) (- char ?0)))
 182       (setq char (read-char)))
 183     (or (eq term-char char)
 184         (error "Invalid data format in mouse command"))
 185     num))
 186
 187 (defun sup-move-point-to-x-y (x y)
 188   "Position cursor in window coordinates.
 189 X and Y are 0-based character positions in the window."
 190   (move-to-window-line y)
 191   (move-to-column x)
 192   )
 193
 194 (defun sup-pos-to-window (x y)
 195   "Find window corresponding to frame coordinates.
 196 X and Y are 0-based character positions on the frame."
 197   (get-window-with-predicate (lambda (w)
 198                                (coordinates-in-window-p (cons x y) w))))
 199
 200 ;;; sup-mouse.el ends here