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1 ;;; bg-mouse.el --- GNU Emacs code for BBN Bitgraph mouse.
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2
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3 ;; Copyright (C) Free Software Foundation, Inc. Oct 1985.
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4
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5 ;; Author: John Robinson <jr@bbn-unix.arpa>
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6 ;; Stephen Gildea <gildea@bbn.com>
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7 ;; Maintainer: FSF
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8 ;; Keywords: hardware
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9
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10 ;; This file is part of GNU Emacs.
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11
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12 ;; GNU Emacs is free software; you can redistribute it and/or modify
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13 ;; it under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; GNU Emacs is distributed in the hope that it will be useful,
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18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 ;; GNU General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with GNU Emacs; see the file COPYING. If not, write to
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24 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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25
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26 ;;; Code:
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27
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28 ;;; Original version by John Robinson (jr@bbn-unix.arpa, bbncca!jr), Oct 1985
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29 ;;; Modularized and enhanced by gildea@bbn.com Nov 1987
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30 ;;; Time stamp <89/03/21 14:27:08 gildea>
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31
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32 ;;; User customization option:
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33
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34 (defvar bg-mouse-fast-select-window nil
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35 "*Non-nil for mouse hits to select new window, then execute; else just select.")
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36
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37 ;;; These numbers are summed to make the index into the mouse-map.
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38 ;;; The low three bits correspond to what the mouse actually sends.
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39 (defconst bg-button-r 1)
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40 (defconst bg-button-m 2)
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41 (defconst bg-button-c 2)
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42 (defconst bg-button-l 4)
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43 (defconst bg-in-modeline 8)
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44 (defconst bg-in-scrollbar 16)
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45 (defconst bg-in-minibuf 24)
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46
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47 ;;; semicolon screws up indenting, so use this instead
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48 (defconst semicolon ?\;)
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49
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50 ;;; Defuns:
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51
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52 (defun bg-mouse-report (prefix-arg)
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53 "Read, parse, and execute a BBN BitGraph mouse click.
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54
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55 L-- move point | These apply for mouse click in a window.
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56 --R set mark | If bg-mouse-fast-select-window is nil,
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57 L-R kill region | these commands on a nonselected window
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58 -C- move point and yank | just select that window.
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59 LC- yank-pop |
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60 -CR or LCR undo | \"Scroll bar\" is right-hand window column.
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61
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62 on modeline: on \"scroll bar\": in minibuffer:
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63 L-- scroll-up line to top execute-extended-command
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64 --R scroll-down line to bottom eval-expression
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65 -C- proportional goto-char line to middle suspend-emacs
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66
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67 To reinitialize the mouse if the terminal is reset, type ESC : RET"
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68 (interactive "P")
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69 (bg-get-tty-num semicolon)
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70 (let*
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71 ((screen-mouse-x (min (1- (frame-width)) ;don't hit column 86!
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72 (/ (bg-get-tty-num semicolon) 9)))
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73 (screen-mouse-y (- (1- (frame-height)) ;assume default font size.
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444
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74 (/ (bg-get-tty-num semicolon) 16)))
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0
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75 (bg-mouse-buttons (% (bg-get-tty-num ?c) 8))
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76 (bg-mouse-window (bg-window-from-x-y screen-mouse-x screen-mouse-y))
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77 (bg-cursor-window (selected-window))
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78 (edges (window-edges bg-mouse-window))
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79 (minibuf-p (= screen-mouse-y (1- (screen-height))))
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80 (in-modeline-p (and (not minibuf-p)
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81 (= screen-mouse-y (1- (nth 3 edges)))))
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82 (in-scrollbar-p (and (not minibuf-p) (not in-modeline-p)
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83 (>= screen-mouse-x (1- (nth 2 edges)))))
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84 (same-window-p (eq bg-mouse-window bg-cursor-window))
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85 (in-minibuf-p (and minibuf-p
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86 (not bg-mouse-window))) ;minibuf must be inactive
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87 (bg-mode-bits (+ (if in-minibuf-p bg-in-minibuf 0)
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88 (if in-modeline-p bg-in-modeline 0)
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89 (if in-scrollbar-p bg-in-scrollbar 0)))
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90 (bg-command
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91 (lookup-key mouse-map
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92 (char-to-string (+ bg-mode-bits bg-mouse-buttons))))
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93 (bg-mouse-x (- screen-mouse-x (nth 0 edges)))
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94 (bg-mouse-y (- screen-mouse-y (nth 1 edges))))
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95 (cond ((or in-modeline-p in-scrollbar-p)
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96 (select-window bg-mouse-window)
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97 (bg-command-execute bg-command)
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98 (select-window bg-cursor-window))
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99 ((or same-window-p in-minibuf-p)
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100 (bg-command-execute bg-command))
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101 (t ;in another window
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102 (select-window bg-mouse-window)
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103 (if bg-mouse-fast-select-window
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104 (bg-command-execute bg-command)))
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105 )))
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106
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107
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108 ;;; Library of commands:
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109
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110 (defun bg-set-point ()
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111 "Move point to location of BitGraph mouse."
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112 (interactive)
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113 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
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114 (setq this-command 'next-line) ;make subsequent line moves work
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115 (setq temporary-goal-column bg-mouse-x))
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116
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117 (defun bg-set-mark ()
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118 "Set mark at location of BitGraph mouse."
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119 (interactive)
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120 (push-mark)
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121 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
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122 (exchange-point-and-mark))
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123
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124 (defun bg-yank ()
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125 "Move point to location of BitGraph mouse and yank."
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126 (interactive "*")
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127 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
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128 (setq this-command 'yank)
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129 (yank))
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130
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131 (defun yank-pop-1 ()
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132 (interactive "*")
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133 (yank-pop 1))
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134
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135 (defun bg-yank-or-pop ()
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136 "Move point to location of BitGraph mouse and yank. If last command
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137 was a yank, do a yank-pop."
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138 (interactive "*")
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139 (if (eql last-command 'yank)
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140 (yank-pop 1)
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141 (bg-yank)))
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142
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143 ;;; In 18.51, Emacs Lisp doesn't provide most-positive-fixnum
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144 (defconst bg-most-positive-fixnum 8388607)
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145
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146 (defun bg-move-by-percentage ()
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147 "Go to location in buffer that is the same percentage of the way
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148 through the buffer as the BitGraph mouse's X position in the window."
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149 (interactive)
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150 ;; check carefully for overflow in intermediate calculations
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151 (goto-char
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152 (cond ((zerop bg-mouse-x)
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153 0)
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154 ((< (buffer-size) (/ bg-most-positive-fixnum bg-mouse-x))
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155 ;; no danger of overflow: compute it exactly
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156 (/ (* bg-mouse-x (buffer-size))
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157 (1- (window-width))))
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158 (t
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159 ;; overflow possible: approximate
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160 (* (/ (buffer-size) (1- (window-width)))
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161 bg-mouse-x))))
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162 (beginning-of-line)
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163 (what-cursor-position))
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164
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165 (defun bg-mouse-line-to-top ()
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166 "Scroll the line pointed to by the BitGraph mouse to the top of the window."
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167 (interactive)
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168 (scroll-up bg-mouse-y))
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169
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170 (defun bg-mouse-line-to-center ()
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444
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171 "Scroll the line pointed to by the BitGraph mouse to the center
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172 of the window."
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173 (interactive)
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174 (scroll-up (/ (+ 2 bg-mouse-y bg-mouse-y (- (window-height))) 2)))
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175
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176 (defun bg-mouse-line-to-bottom ()
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177 "Scroll the line pointed to by the mouse to the bottom of the window."
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178 (interactive)
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179 (scroll-up (+ bg-mouse-y (- 2 (window-height)))))
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180
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181 (defun bg-kill-region ()
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182 (interactive "*")
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183 (kill-region (region-beginning) (region-end)))
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184
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185 (defun bg-insert-moused-sexp ()
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186 "Insert a copy of the word (actually sexp) that the mouse is pointing at.
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187 Sexp is inserted into the buffer at point (where the text cursor is)."
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188 (interactive)
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189 (let ((moused-text
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190 (save-excursion
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191 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
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192 (if (looking-at "\\s)")
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193 (forward-char 1)
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194 (forward-sexp 1))
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195 (buffer-substring (save-excursion (backward-sexp 1) (point))
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196 (point)))))
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197 (select-window bg-cursor-window)
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198 (delete-horizontal-space)
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199 (cond
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200 ((bolp)
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201 (indent-according-to-mode))
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202 ;; In Lisp assume double-quote is closing; in Text assume opening.
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203 ;; Why? Because it does the right thing most often.
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446
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204 ((save-excursion (backward-char 1)
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205 (and (not (looking-at "\\s\""))
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206 (looking-at "[`'\"\\]\\|\\s(")))
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207 nil)
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208 (t
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209 (insert-string " ")))
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210 (insert-string moused-text)
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211 (or (eolp)
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212 (looking-at "\\s.\\|\\s)")
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213 (and (looking-at "'") (looking-at "\\sw")) ;hack for text mode
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214 (save-excursion (insert-string " ")))))
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215
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216 ;;; Utility functions:
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217
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218 (defun bg-get-tty-num (term-char)
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219 "Read from terminal until TERM-CHAR is read, and return intervening number.
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220 If non-numeric not matching TERM-CHAR, reprogram the mouse and signal an error."
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221 (let
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222 ((num 0)
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223 (char (- (read-char) 48)))
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224 (while (and (>= char 0)
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225 (<= char 9))
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226 (setq num (+ (* num 10) char))
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227 (setq char (- (read-char) 48)))
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228 (or (eq term-char (+ char 48))
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229 (progn
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230 (bg-program-mouse)
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231 (error
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232 "Invalid data format in bg-mouse command: mouse reinitialized.")))
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233 num))
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234
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235 ;;; Note that this fails in the minibuf because move-to-column doesn't
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236 ;;; allow for the width of the prompt.
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237 (defun bg-move-point-to-x-y (x y)
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238 "Position cursor in window coordinates.
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239 X and Y are 0-based character positions in the window."
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240 (move-to-window-line y)
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241 ;; if not on a wrapped line, zero-column will be 0
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242 (let ((zero-column (current-column))
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243 (scroll-offset (window-hscroll)))
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244 ;; scrolling takes up column 0 to display the $
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245 (if (> scroll-offset 0)
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246 (setq scroll-offset (1- scroll-offset)))
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247 (move-to-column (+ zero-column scroll-offset x))
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248 ))
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249
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250 ;;; Returns the window that screen position (x, y) is in or nil if none,
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251 ;;; meaning we are in the echo area with a non-active minibuffer.
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252 ;;; If coordinates-in-window-p were not in an X-windows-specific file
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253 ;;; we could use that. In Emacs 19 can even use locate-window-from-coordinates
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254 (defun bg-window-from-x-y (x y)
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255 "Find window corresponding to screen coordinates.
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256 X and Y are 0-based character positions on the screen."
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257 (let ((edges (window-edges))
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258 (window nil))
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259 (while (and (not (eq window (selected-window)))
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260 (or (< y (nth 1 edges))
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261 (>= y (nth 3 edges))
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262 (< x (nth 0 edges))
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263 (>= x (nth 2 edges))))
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264 (setq window (next-window window))
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265 (setq edges (window-edges window)))
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266 (cond ((eq window (selected-window))
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267 nil) ;we've looped: not found
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268 ((not window)
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269 (selected-window)) ;just starting: current window
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270 (t
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271 window))
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272 ))
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273
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274 (defun bg-command-execute (bg-command)
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275 (if (commandp bg-command)
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276 (command-execute bg-command)
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277 (ding)))
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278
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279 (defun bg-program-mouse ()
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280 (send-string-to-terminal "\e:0;7;;;360;512;9;16;9;16c"))
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281
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282 ;;; Note that the doc string for mouse-map (as defined in subr.el)
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283 ;;; says it is for the X-window mouse. This is wrong; that keymap
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284 ;;; should be used for your mouse no matter what terminal you have.
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285
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286 (or (keymapp mouse-map)
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287 (setq mouse-map (make-keymap)))
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288
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289 (defun bind-bg-mouse-click (click-code function)
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290 "Bind bg-mouse CLICK-CODE to run FUNCTION."
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291 (define-key mouse-map (char-to-string click-code) function))
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292
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444
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293 (bind-bg-mouse-click bg-button-l 'bg-set-point)
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0
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294 (bind-bg-mouse-click bg-button-m 'bg-yank)
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295 (bind-bg-mouse-click bg-button-r 'bg-set-mark)
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296 (bind-bg-mouse-click (+ bg-button-l bg-button-m) 'yank-pop-1)
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297 (bind-bg-mouse-click (+ bg-button-l bg-button-r) 'bg-kill-region)
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298 (bind-bg-mouse-click (+ bg-button-m bg-button-r) 'undo)
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299 (bind-bg-mouse-click (+ bg-button-l bg-button-m bg-button-r) 'undo)
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300 (bind-bg-mouse-click (+ bg-in-modeline bg-button-l) 'scroll-up)
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301 (bind-bg-mouse-click (+ bg-in-modeline bg-button-m) 'bg-move-by-percentage)
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302 (bind-bg-mouse-click (+ bg-in-modeline bg-button-r) 'scroll-down)
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303 (bind-bg-mouse-click (+ bg-in-scrollbar bg-button-l) 'bg-mouse-line-to-top)
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304 (bind-bg-mouse-click (+ bg-in-scrollbar bg-button-m) 'bg-mouse-line-to-center)
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305 (bind-bg-mouse-click (+ bg-in-scrollbar bg-button-r) 'bg-mouse-line-to-bottom)
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306 (bind-bg-mouse-click (+ bg-in-minibuf bg-button-l) 'execute-extended-command)
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307 (bind-bg-mouse-click (+ bg-in-minibuf bg-button-m) 'suspend-emacs)
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308 (bind-bg-mouse-click (+ bg-in-minibuf bg-button-r) 'eval-expression)
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309
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310 (provide 'bg-mouse)
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311
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312 ;;; bg-mouse.el ends here
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