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1 ;;; viper-mous.el --- mouse support for Viper
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2
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82
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3 ;; Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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0
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4
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5 ;; This file is part of GNU Emacs.
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6
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7 ;; GNU Emacs is free software; you can redistribute it and/or modify
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8 ;; it under the terms of the GNU General Public License as published by
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9 ;; the Free Software Foundation; either version 2, or (at your option)
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10 ;; any later version.
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11
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12 ;; GNU Emacs is distributed in the hope that it will be useful,
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13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 ;; GNU General Public License for more details.
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16
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17 ;; You should have received a copy of the GNU General Public License
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18 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 ;; Boston, MA 02111-1307, USA.
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21
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22 ;; Code
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23
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80
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24 (provide 'viper-mous)
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25
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26 ;; compiler pacifier
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27 (defvar double-click-time)
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28 (defvar mouse-track-multi-click-time)
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80
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29 (defvar vip-search-start-marker)
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30 (defvar vip-local-search-start-marker)
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31 (defvar vip-search-history)
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32 (defvar vip-s-string)
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33 (defvar vip-re-search)
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34
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163
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35 ;; loading happens only in non-interactive compilation
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36 ;; in order to spare non-viperized emacs from being viperized
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37 (if noninteractive
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38 (eval-when-compile
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39 (let ((load-path (cons (expand-file-name ".") load-path)))
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40 (or (featurep 'viper-util)
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41 (load "viper-util.el" nil nil 'nosuffix))
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42 (or (featurep 'viper-cmd)
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43 (load "viper-cmd.el" nil nil 'nosuffix))
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44 )))
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80
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45 ;; end pacifier
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46
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47 (require 'viper-util)
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48
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82
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49
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50
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51 ;;; Variables
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52
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53 ;; Variable used for catching the switch-frame event.
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54 ;; If non-nil, indicates that previous-frame should be the selected
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55 ;; one. Used by vip-mouse-click-get-word. Not a user option.
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56 (defvar vip-frame-of-focus nil)
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57
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58 ;; Frame that was selected before the switch-frame event.
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59 (defconst vip-current-frame-saved (selected-frame))
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60
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61 (defvar vip-surrounding-word-function 'vip-surrounding-word
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62 "*Function that determines what constitutes a word for clicking events.
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63 Takes two parameters: a COUNT, indicating how many words to return,
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64 and CLICK-COUNT, telling whether this is the first click, a double-click,
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65 or a tripple-click.")
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66
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67 ;; time interval in millisecond within which successive clicks are
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68 ;; considered related
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163
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69 (defconst vip-multiclick-timeout (if (vip-window-display-p)
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70 (if vip-xemacs-p
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71 mouse-track-multi-click-time
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72 double-click-time)
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73 500)
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0
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74 "*Time interval in millisecond within which successive clicks are
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75 considered related.")
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76
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77 ;; current event click count; XEmacs only
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78 (defvar vip-current-click-count 0)
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79 ;; time stamp of the last click event; XEmacs only
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80 (defvar vip-last-click-event-timestamp 0)
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81
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82 ;; Local variable used to toggle wraparound search on click.
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83 (vip-deflocalvar vip-mouse-click-search-noerror t)
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84
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85 ;; Local variable used to delimit search after wraparound.
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86 (vip-deflocalvar vip-mouse-click-search-limit nil)
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87
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88 ;; remembers prefix argument to pass along to commands invoked by second
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89 ;; click.
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90 ;; This is needed because in Emacs (not XEmacs), assigning to preix-arg
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91 ;; causes Emacs to count the second click as if it was a single click
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92 (defvar vip-global-prefix-argument nil)
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93
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94
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95
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96 ;;; Code
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97
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98 (defsubst vip-multiclick-p ()
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99 (not (vip-sit-for-short vip-multiclick-timeout t)))
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100
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101 ;; Returns window where click occurs
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102 (defsubst vip-mouse-click-window (click)
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103 (if vip-xemacs-p
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104 (event-window click)
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105 (posn-window (event-start click))))
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106
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107 ;; Returns window where click occurs
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108 (defsubst vip-mouse-click-frame (click)
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109 (window-frame (vip-mouse-click-window click)))
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110
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111 ;; Returns the buffer of the window where click occurs
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112 (defsubst vip-mouse-click-window-buffer (click)
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113 (window-buffer (vip-mouse-click-window click)))
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114
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115 ;; Returns the name of the buffer in the window where click occurs
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116 (defsubst vip-mouse-click-window-buffer-name (click)
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117 (buffer-name (vip-mouse-click-window-buffer click)))
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118
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119 ;; Returns position of a click
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120 (defsubst vip-mouse-click-posn (click)
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121 (if vip-xemacs-p
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122 (event-point click)
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123 (posn-point (event-start click))))
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124
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125
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126 (defun vip-surrounding-word (count click-count)
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127 "Returns word surrounding point according to a heuristic.
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128 COUNT indicates how many regions to return.
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129 If CLICK-COUNT is 1, `word' is a word in Vi sense.
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130 If CLICK-COUNT is 2,then `word' is a Word in Vi sense.
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131 If the character clicked on is a non-separator and is non-alphanumeric but
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132 is adjacent to an alphanumeric symbol, then it is considered alphanumeric
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133 for the purpose of this command. If this character has a matching
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134 character, such as `\(' is a match for `\)', then the matching character is
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135 also considered alphanumeric.
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136 For convenience, in Lisp modes, `-' is considered alphanumeric.
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137
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138 If CLICK-COUNT is 3 or more, returns the line clicked on with leading and
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139 trailing space and tabs removed. In that case, the first argument, COUNT,
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140 is ignored."
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141 (let ((modifiers "")
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142 beg skip-flag result
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143 word-beg)
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144 (if (> click-count 2)
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145 (save-excursion
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146 (beginning-of-line)
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147 (vip-skip-all-separators-forward 'within-line)
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148 (setq beg (point))
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149 (end-of-line)
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150 (setq result (buffer-substring beg (point))))
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151
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152 (if (and (not (vip-looking-at-alphasep))
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153 (or (save-excursion (vip-backward-char-carefully)
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154 (vip-looking-at-alpha))
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155 (save-excursion (vip-forward-char-carefully)
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156 (vip-looking-at-alpha))))
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157 (setq modifiers
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158 (cond ((looking-at "\\\\") "\\\\")
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159 ((looking-at "-") "C-C-")
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160 ((looking-at "[][]") "][")
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161 ((looking-at "[()]") ")(")
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162 ((looking-at "[{}]") "{}")
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163 ((looking-at "[<>]") "<>")
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164 ((looking-at "[`']") "`'")
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165 ((looking-at "\\^") "\\^")
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166 ((vip-looking-at-separator) "")
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167 (t (char-to-string (following-char))))
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168 ))
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169
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170 ;; Add `-' to alphanum, if it wasn't added and if we are in Lisp
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171 (or (looking-at "-")
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172 (not (string-match "lisp" (symbol-name major-mode)))
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173 (setq modifiers (concat modifiers "C-C-")))
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174
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175
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176 (save-excursion
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177 (cond ((> click-count 1) (vip-skip-nonseparators 'backward))
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178 ((vip-looking-at-alpha modifiers)
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179 (vip-skip-alpha-backward modifiers))
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180 ((not (vip-looking-at-alphasep modifiers))
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181 (vip-skip-nonalphasep-backward))
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182 (t (if (> click-count 1)
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183 (vip-skip-nonseparators 'backward)
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184 (vip-skip-alpha-backward modifiers))))
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185
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186 (setq word-beg (point))
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187
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188 (setq skip-flag nil) ; don't move 1 char forw the first time
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189 (while (> count 0)
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190 (if skip-flag (vip-forward-char-carefully 1))
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191 (setq skip-flag t) ; now always move 1 char forward
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192 (if (> click-count 1)
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193 (vip-skip-nonseparators 'forward)
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194 (vip-skip-alpha-forward modifiers))
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195 (setq count (1- count)))
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196
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197 (setq result (buffer-substring word-beg (point))))
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198 ) ; if
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199 ;; XEmacs doesn't have set-text-properties, but there buffer-substring
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200 ;; doesn't return properties together with the string, so it's not needed.
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201 (if vip-emacs-p
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202 (set-text-properties 0 (length result) nil result))
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203 result
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204 ))
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205
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206
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207 (defun vip-mouse-click-get-word (click count click-count)
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208 "Returns word surrounding the position of a mouse click.
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209 Click may be in another window. Current window and buffer isn't changed.
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210 On single or double click, returns the word as determined by
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211 `vip-surrounding-word-function'."
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212
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213 (let ((click-word "")
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214 (click-pos (vip-mouse-click-posn click))
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215 (click-buf (vip-mouse-click-window-buffer click)))
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216 (or (natnump count) (setq count 1))
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217 (or (natnump click-count) (setq click-count 1))
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218
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219 (save-excursion
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220 (save-window-excursion
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221 (if click-pos
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222 (progn
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223 (set-buffer click-buf)
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224
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225 (goto-char click-pos)
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226 (setq click-word
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227 (funcall vip-surrounding-word-function count click-count)))
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228 (error "Click must be over a window."))
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229 click-word))))
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230
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231
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232 (defun vip-mouse-click-insert-word (click arg)
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233 "Insert word clicked or double-clicked on.
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234 With prefix argument, N, insert that many words.
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235 This command must be bound to a mouse click.
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236 The double-click action of the same mouse button must not be bound
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237 \(or it must be bound to the same function\).
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238 See `vip-surrounding-word' for the definition of a word in this case."
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239 (interactive "e\nP")
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240 (if vip-frame-of-focus ;; to handle clicks in another frame
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241 (select-frame vip-frame-of-focus))
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242
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243 ;; turn arg into a number
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244 (cond ((integerp arg) nil)
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245 ;; prefix arg is a list when one hits C-u then command
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246 ((and (listp arg) (integerp (car arg)))
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247 (setq arg (car arg)))
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248 (t (setq arg 1)))
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249
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250 (let (click-count interrupting-event)
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251 (if (and
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252 (vip-multiclick-p)
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253 ;; This trick checks if there is a pending mouse event
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254 ;; if so, we use this latter event and discard the current mouse click
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255 ;; If the next pending event is not a mouse event, we execute
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256 ;; the current mouse event
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257 (progn
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258 (setq interrupting-event (vip-read-event))
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259 (vip-mouse-event-p last-input-event)))
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260 (progn ;; interrupted wait
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261 (setq vip-global-prefix-argument arg)
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262 ;; count this click for XEmacs
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263 (vip-event-click-count click))
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264 ;; uninterrupted wait or the interrupting event wasn't a mouse event
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265 (setq click-count (vip-event-click-count click))
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266 (if (> click-count 1)
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267 (setq arg vip-global-prefix-argument
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268 vip-global-prefix-argument nil))
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269 (insert (vip-mouse-click-get-word click arg click-count))
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270 (if (and interrupting-event
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271 (eventp interrupting-event)
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272 (not (vip-mouse-event-p interrupting-event)))
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273 (vip-set-unread-command-events interrupting-event))
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274 )))
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275
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276 ;; arg is an event. accepts symbols and numbers, too
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277 (defun vip-mouse-event-p (event)
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278 (if (eventp event)
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279 (string-match "\\(mouse-\\|frame\\|screen\\|track\\)"
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280 (prin1-to-string (vip-event-key event)))))
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281
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282 ;; XEmacs has no double-click events. So, we must simulate.
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283 ;; So, we have to simulate event-click-count.
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284 (defun vip-event-click-count (click)
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285 (if vip-xemacs-p
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286 (progn
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287 ;; if more than 1 second
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288 (if (> (- (event-timestamp click) vip-last-click-event-timestamp)
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289 vip-multiclick-timeout)
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290 (setq vip-current-click-count 0))
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291 (setq vip-last-click-event-timestamp (event-timestamp click)
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292 vip-current-click-count (1+ vip-current-click-count)))
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293 (event-click-count click)))
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294
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295
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296
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297 (defun vip-mouse-click-search-word (click arg)
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298 "Find the word clicked or double-clicked on. Word may be in another window.
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299 With prefix argument, N, search for N-th occurrence.
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300 This command must be bound to a mouse click. The double-click action of the
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301 same button must not be bound \(or it must be bound to the same function\).
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302 See `vip-surrounding-word' for the details on what constitutes a word for
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303 this command."
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304 (interactive "e\nP")
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305 (if vip-frame-of-focus ;; to handle clicks in another frame
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306 (select-frame vip-frame-of-focus))
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307 (let (click-word click-count
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308 (previous-search-string vip-s-string))
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309
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310 (if (and
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311 (vip-multiclick-p)
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312 ;; This trick checks if there is a pending mouse event
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313 ;; if so, we use this latter event and discard the current mouse click
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314 ;; If the next pending event is not a mouse event, we execute
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315 ;; the current mouse event
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316 (progn
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317 (vip-read-event)
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318 (vip-mouse-event-p last-input-event)))
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319 (progn ;; interrupted wait
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320 (setq vip-global-prefix-argument
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321 (or vip-global-prefix-argument arg))
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322 ;; remember command that was before the multiclick
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323 (setq this-command last-command)
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324 ;; make sure we counted this event---needed for XEmacs only
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325 (vip-event-click-count click))
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326 ;; uninterrupted wait
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327 (setq click-count (vip-event-click-count click))
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328 (setq click-word (vip-mouse-click-get-word click nil click-count))
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329
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330 (if (> click-count 1)
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331 (setq arg vip-global-prefix-argument
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332 vip-global-prefix-argument nil))
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333 (setq arg (or arg 1))
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334
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335 (vip-deactivate-mark)
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336 (if (or (not (string= click-word vip-s-string))
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337 (not (markerp vip-search-start-marker))
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338 (not (equal (marker-buffer vip-search-start-marker)
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339 (current-buffer)))
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340 (not (eq last-command 'vip-mouse-click-search-word)))
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341 (progn
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342 (setq vip-search-start-marker (point-marker)
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343 vip-local-search-start-marker vip-search-start-marker
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344 vip-mouse-click-search-noerror t
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345 vip-mouse-click-search-limit nil)
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346
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347 ;; make search string known to Viper
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348 (setq vip-s-string (if vip-re-search
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349 (regexp-quote click-word)
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350 click-word))
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351 (if (not (string= vip-s-string (car vip-search-history)))
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352 (setq vip-search-history
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353 (cons vip-s-string vip-search-history)))
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354 ))
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355
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356 (push-mark nil t)
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357 (while (> arg 0)
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358 (vip-forward-word 1)
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359 (condition-case nil
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360 (progn
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361 (if (not (search-forward click-word vip-mouse-click-search-limit
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362 vip-mouse-click-search-noerror))
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363 (progn
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364 (setq vip-mouse-click-search-noerror nil)
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365 (setq vip-mouse-click-search-limit
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366 (save-excursion
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367 (if (and
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368 (markerp vip-local-search-start-marker)
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369 (marker-buffer vip-local-search-start-marker))
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370 (goto-char vip-local-search-start-marker))
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371 (vip-line-pos 'end)))
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372
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373 (goto-char (point-min))
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374 (search-forward click-word
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375 vip-mouse-click-search-limit nil)))
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376 (goto-char (match-beginning 0))
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377 (message "Searching for: %s" vip-s-string)
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78
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378 (if (<= arg 1) ; found the right occurrence of the pattern
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379 (progn
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380 (vip-adjust-window)
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381 (vip-flash-search-pattern)))
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0
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382 )
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383 (error (beep 1)
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384 (if (or (not (string= click-word previous-search-string))
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385 (not (eq last-command 'vip-mouse-click-search-word)))
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386 (message "`%s': String not found in %s"
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387 vip-s-string (buffer-name (current-buffer)))
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388 (message
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389 "`%s': Last occurrence in %s. Back to beginning of search"
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390 click-word (buffer-name (current-buffer)))
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391 (setq arg 1) ;; to terminate the loop
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392 (sit-for 2))
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393 (setq vip-mouse-click-search-noerror t)
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394 (setq vip-mouse-click-search-limit nil)
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395 (if (and (markerp vip-local-search-start-marker)
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396 (marker-buffer vip-local-search-start-marker))
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397 (goto-char vip-local-search-start-marker))))
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398 (setq arg (1- arg)))
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399 )))
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400
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401 (defun vip-mouse-catch-frame-switch (event arg)
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402 "Catch the event of switching frame.
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403 Usually is bound to a 'down-mouse' event to work properly. See sample
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163
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404 bindings in the Viper manual."
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0
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405 (interactive "e\nP")
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406 (setq vip-frame-of-focus nil)
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407 ;; pass prefix arg along to vip-mouse-click-search/insert-word
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408 (setq prefix-arg arg)
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409 (if (eq last-command 'handle-switch-frame)
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410 (setq vip-frame-of-focus vip-current-frame-saved))
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411 ;; make Emacs forget that it executed vip-mouse-catch-frame-switch
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412 (setq this-command last-command))
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413
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414 ;; Called just before switching frames. Saves the old selected frame.
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415 ;; Sets last-command to handle-switch-frame (this is done automatically in
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416 ;; Emacs.
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417 ;; The semantics of switching frames is different in Emacs and XEmacs.
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418 ;; In Emacs, if you select-frame A while mouse is over frame B and then
|
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419 ;; start typing, input goes to frame B, which becomes selected.
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420 ;; In XEmacs, input will go to frame A. This may be a bug in one of the
|
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421 ;; Emacsen, but also may be a design decision.
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422 ;; Also, in Emacs sending input to frame B generates handle-switch-frame
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423 ;; event, while in XEmacs it doesn't.
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|
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424 ;; All this accounts for the difference in the behavior of
|
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425 ;; vip-mouse-click-* commands when you click in a frame other than the one
|
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426 ;; that was the last to receive input. In Emacs, focus will be in frame A
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427 ;; until you do something other than vip-mouse-click-* command.
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428 ;; In XEmacs, you have to manually select frame B (with the mouse click) in
|
|
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429 ;; order to shift focus to frame B.
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|
|
430 (defsubst vip-remember-current-frame (frame)
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|
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431 (setq last-command 'handle-switch-frame
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432 vip-current-frame-saved (selected-frame)))
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433
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434
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435
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436 ;;; viper-mous.el ends here
|
