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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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16
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48
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82
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49
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175
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50 (defgroup viper-mouse nil
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51 "Support for Viper special mouse-bound commands"
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52 :prefix "vip-"
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53 :group 'viper)
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54
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55
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56 ;;; Variables
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57
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58 ;; Variable used for catching the switch-frame event.
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59 ;; If non-nil, indicates that previous-frame should be the selected
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60 ;; one. Used by vip-mouse-click-get-word. Not a user option.
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61 (defvar vip-frame-of-focus nil)
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62
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63 ;; Frame that was selected before the switch-frame event.
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64 (defconst vip-current-frame-saved (selected-frame))
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65
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175
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66 (defcustom vip-surrounding-word-function 'vip-surrounding-word
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67 "*Function that determines what constitutes a word for clicking events.
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68 Takes two parameters: a COUNT, indicating how many words to return,
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69 and CLICK-COUNT, telling whether this is the first click, a double-click,
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175
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70 or a tripple-click."
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71 :type 'boolean
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72 :group 'viper-mouse)
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73
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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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175
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76 (defcustom vip-multiclick-timeout (if (vip-window-display-p)
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77 (if vip-xemacs-p
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78 mouse-track-multi-click-time
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79 double-click-time)
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80 500)
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81 "*Time interval in millisecond within which successive mouse clicks are
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82 considered related."
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83 :type 'integer
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84 :group 'viper-mouse)
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85
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86 ;; current event click count; XEmacs only
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87 (defvar vip-current-click-count 0)
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88 ;; time stamp of the last click event; XEmacs only
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89 (defvar vip-last-click-event-timestamp 0)
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90
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91 ;; Local variable used to toggle wraparound search on click.
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92 (vip-deflocalvar vip-mouse-click-search-noerror t)
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93
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94 ;; Local variable used to delimit search after wraparound.
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95 (vip-deflocalvar vip-mouse-click-search-limit nil)
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96
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97 ;; remembers prefix argument to pass along to commands invoked by second
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98 ;; click.
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99 ;; This is needed because in Emacs (not XEmacs), assigning to preix-arg
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100 ;; causes Emacs to count the second click as if it was a single click
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101 (defvar vip-global-prefix-argument nil)
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102
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103
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104
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105 ;;; Code
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106
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107 (defsubst vip-multiclick-p ()
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108 (not (vip-sit-for-short vip-multiclick-timeout t)))
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109
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110 ;; Returns window where click occurs
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111 (defsubst vip-mouse-click-window (click)
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112 (if vip-xemacs-p
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113 (event-window click)
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114 (posn-window (event-start click))))
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115
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116 ;; Returns window where click occurs
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117 (defsubst vip-mouse-click-frame (click)
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118 (window-frame (vip-mouse-click-window click)))
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119
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120 ;; Returns the buffer of the window where click occurs
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121 (defsubst vip-mouse-click-window-buffer (click)
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122 (window-buffer (vip-mouse-click-window click)))
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123
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124 ;; Returns the name of the buffer in the window where click occurs
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125 (defsubst vip-mouse-click-window-buffer-name (click)
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126 (buffer-name (vip-mouse-click-window-buffer click)))
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127
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128 ;; Returns position of a click
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129 (defsubst vip-mouse-click-posn (click)
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130 (if vip-xemacs-p
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131 (event-point click)
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132 (posn-point (event-start click))))
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133
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134
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135 (defun vip-surrounding-word (count click-count)
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136 "Returns word surrounding point according to a heuristic.
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137 COUNT indicates how many regions to return.
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138 If CLICK-COUNT is 1, `word' is a word in Vi sense.
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139 If CLICK-COUNT is 2,then `word' is a Word in Vi sense.
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140 If the character clicked on is a non-separator and is non-alphanumeric but
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141 is adjacent to an alphanumeric symbol, then it is considered alphanumeric
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142 for the purpose of this command. If this character has a matching
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143 character, such as `\(' is a match for `\)', then the matching character is
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144 also considered alphanumeric.
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145 For convenience, in Lisp modes, `-' is considered alphanumeric.
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146
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147 If CLICK-COUNT is 3 or more, returns the line clicked on with leading and
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148 trailing space and tabs removed. In that case, the first argument, COUNT,
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149 is ignored."
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150 (let ((modifiers "")
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151 beg skip-flag result
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152 word-beg)
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153 (if (> click-count 2)
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154 (save-excursion
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155 (beginning-of-line)
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156 (vip-skip-all-separators-forward 'within-line)
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157 (setq beg (point))
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158 (end-of-line)
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159 (setq result (buffer-substring beg (point))))
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160
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161 (if (and (not (vip-looking-at-alphasep))
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162 (or (save-excursion (vip-backward-char-carefully)
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163 (vip-looking-at-alpha))
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164 (save-excursion (vip-forward-char-carefully)
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165 (vip-looking-at-alpha))))
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166 (setq modifiers
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167 (cond ((looking-at "\\\\") "\\\\")
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168 ((looking-at "-") "C-C-")
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169 ((looking-at "[][]") "][")
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170 ((looking-at "[()]") ")(")
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171 ((looking-at "[{}]") "{}")
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172 ((looking-at "[<>]") "<>")
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173 ((looking-at "[`']") "`'")
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174 ((looking-at "\\^") "\\^")
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175 ((vip-looking-at-separator) "")
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176 (t (char-to-string (following-char))))
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177 ))
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178
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179 ;; Add `-' to alphanum, if it wasn't added and if we are in Lisp
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180 (or (looking-at "-")
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181 (not (string-match "lisp" (symbol-name major-mode)))
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182 (setq modifiers (concat modifiers "C-C-")))
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183
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184
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185 (save-excursion
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186 (cond ((> click-count 1) (vip-skip-nonseparators 'backward))
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187 ((vip-looking-at-alpha modifiers)
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188 (vip-skip-alpha-backward modifiers))
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189 ((not (vip-looking-at-alphasep modifiers))
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190 (vip-skip-nonalphasep-backward))
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191 (t (if (> click-count 1)
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192 (vip-skip-nonseparators 'backward)
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193 (vip-skip-alpha-backward modifiers))))
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194
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195 (setq word-beg (point))
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196
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197 (setq skip-flag nil) ; don't move 1 char forw the first time
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198 (while (> count 0)
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199 (if skip-flag (vip-forward-char-carefully 1))
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200 (setq skip-flag t) ; now always move 1 char forward
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201 (if (> click-count 1)
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202 (vip-skip-nonseparators 'forward)
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203 (vip-skip-alpha-forward modifiers))
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204 (setq count (1- count)))
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205
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206 (setq result (buffer-substring word-beg (point))))
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207 ) ; if
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208 ;; XEmacs doesn't have set-text-properties, but there buffer-substring
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209 ;; doesn't return properties together with the string, so it's not needed.
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210 (if vip-emacs-p
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211 (set-text-properties 0 (length result) nil result))
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212 result
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213 ))
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214
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215
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216 (defun vip-mouse-click-get-word (click count click-count)
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217 "Returns word surrounding the position of a mouse click.
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218 Click may be in another window. Current window and buffer isn't changed.
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219 On single or double click, returns the word as determined by
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220 `vip-surrounding-word-function'."
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221
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222 (let ((click-word "")
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223 (click-pos (vip-mouse-click-posn click))
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224 (click-buf (vip-mouse-click-window-buffer click)))
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225 (or (natnump count) (setq count 1))
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226 (or (natnump click-count) (setq click-count 1))
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227
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228 (save-excursion
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229 (save-window-excursion
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230 (if click-pos
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231 (progn
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232 (set-buffer click-buf)
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233
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234 (goto-char click-pos)
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235 (setq click-word
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236 (funcall vip-surrounding-word-function count click-count)))
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237 (error "Click must be over a window."))
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238 click-word))))
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239
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240
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241 (defun vip-mouse-click-insert-word (click arg)
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242 "Insert word clicked or double-clicked on.
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243 With prefix argument, N, insert that many words.
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244 This command must be bound to a mouse click.
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245 The double-click action of the same mouse button must not be bound
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246 \(or it must be bound to the same function\).
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247 See `vip-surrounding-word' for the definition of a word in this case."
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248 (interactive "e\nP")
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249 (if vip-frame-of-focus ;; to handle clicks in another frame
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250 (select-frame vip-frame-of-focus))
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251
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252 ;; turn arg into a number
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253 (cond ((integerp arg) nil)
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254 ;; prefix arg is a list when one hits C-u then command
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255 ((and (listp arg) (integerp (car arg)))
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256 (setq arg (car arg)))
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257 (t (setq arg 1)))
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258
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259 (let (click-count interrupting-event)
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260 (if (and
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261 (vip-multiclick-p)
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262 ;; This trick checks if there is a pending mouse event
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263 ;; if so, we use this latter event and discard the current mouse click
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264 ;; If the next pending event is not a mouse event, we execute
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265 ;; the current mouse event
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266 (progn
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267 (setq interrupting-event (vip-read-event))
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268 (vip-mouse-event-p last-input-event)))
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269 (progn ;; interrupted wait
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270 (setq vip-global-prefix-argument arg)
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271 ;; count this click for XEmacs
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272 (vip-event-click-count click))
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273 ;; uninterrupted wait or the interrupting event wasn't a mouse event
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274 (setq click-count (vip-event-click-count click))
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275 (if (> click-count 1)
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276 (setq arg vip-global-prefix-argument
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277 vip-global-prefix-argument nil))
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278 (insert (vip-mouse-click-get-word click arg click-count))
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279 (if (and interrupting-event
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280 (eventp interrupting-event)
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281 (not (vip-mouse-event-p interrupting-event)))
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282 (vip-set-unread-command-events interrupting-event))
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283 )))
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284
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285 ;; arg is an event. accepts symbols and numbers, too
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286 (defun vip-mouse-event-p (event)
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287 (if (eventp event)
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288 (string-match "\\(mouse-\\|frame\\|screen\\|track\\)"
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289 (prin1-to-string (vip-event-key event)))))
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290
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291 ;; XEmacs has no double-click events. So, we must simulate.
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292 ;; So, we have to simulate event-click-count.
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293 (defun vip-event-click-count (click)
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294 (if vip-xemacs-p
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295 (progn
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296 ;; if more than 1 second
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297 (if (> (- (event-timestamp click) vip-last-click-event-timestamp)
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298 vip-multiclick-timeout)
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299 (setq vip-current-click-count 0))
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300 (setq vip-last-click-event-timestamp (event-timestamp click)
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301 vip-current-click-count (1+ vip-current-click-count)))
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302 (event-click-count click)))
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303
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304
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305
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306 (defun vip-mouse-click-search-word (click arg)
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307 "Find the word clicked or double-clicked on. Word may be in another window.
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308 With prefix argument, N, search for N-th occurrence.
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309 This command must be bound to a mouse click. The double-click action of the
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310 same button must not be bound \(or it must be bound to the same function\).
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311 See `vip-surrounding-word' for the details on what constitutes a word for
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312 this command."
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313 (interactive "e\nP")
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314 (if vip-frame-of-focus ;; to handle clicks in another frame
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315 (select-frame vip-frame-of-focus))
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316 (let (click-word click-count
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317 (previous-search-string vip-s-string))
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318
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319 (if (and
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320 (vip-multiclick-p)
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321 ;; This trick checks if there is a pending mouse event
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322 ;; if so, we use this latter event and discard the current mouse click
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323 ;; If the next pending event is not a mouse event, we execute
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324 ;; the current mouse event
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325 (progn
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326 (vip-read-event)
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327 (vip-mouse-event-p last-input-event)))
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328 (progn ;; interrupted wait
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329 (setq vip-global-prefix-argument
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330 (or vip-global-prefix-argument arg))
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331 ;; remember command that was before the multiclick
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332 (setq this-command last-command)
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333 ;; make sure we counted this event---needed for XEmacs only
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334 (vip-event-click-count click))
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335 ;; uninterrupted wait
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336 (setq click-count (vip-event-click-count click))
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337 (setq click-word (vip-mouse-click-get-word click nil click-count))
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338
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339 (if (> click-count 1)
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340 (setq arg vip-global-prefix-argument
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341 vip-global-prefix-argument nil))
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342 (setq arg (or arg 1))
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343
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344 (vip-deactivate-mark)
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345 (if (or (not (string= click-word vip-s-string))
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346 (not (markerp vip-search-start-marker))
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347 (not (equal (marker-buffer vip-search-start-marker)
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348 (current-buffer)))
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349 (not (eq last-command 'vip-mouse-click-search-word)))
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350 (progn
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351 (setq vip-search-start-marker (point-marker)
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352 vip-local-search-start-marker vip-search-start-marker
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353 vip-mouse-click-search-noerror t
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354 vip-mouse-click-search-limit nil)
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355
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356 ;; make search string known to Viper
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357 (setq vip-s-string (if vip-re-search
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358 (regexp-quote click-word)
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359 click-word))
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360 (if (not (string= vip-s-string (car vip-search-history)))
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361 (setq vip-search-history
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362 (cons vip-s-string vip-search-history)))
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363 ))
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364
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365 (push-mark nil t)
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366 (while (> arg 0)
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367 (vip-forward-word 1)
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368 (condition-case nil
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369 (progn
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370 (if (not (search-forward click-word vip-mouse-click-search-limit
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371 vip-mouse-click-search-noerror))
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372 (progn
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373 (setq vip-mouse-click-search-noerror nil)
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374 (setq vip-mouse-click-search-limit
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375 (save-excursion
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376 (if (and
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377 (markerp vip-local-search-start-marker)
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378 (marker-buffer vip-local-search-start-marker))
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379 (goto-char vip-local-search-start-marker))
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380 (vip-line-pos 'end)))
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381
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382 (goto-char (point-min))
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383 (search-forward click-word
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384 vip-mouse-click-search-limit nil)))
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385 (goto-char (match-beginning 0))
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386 (message "Searching for: %s" vip-s-string)
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78
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387 (if (<= arg 1) ; found the right occurrence of the pattern
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388 (progn
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389 (vip-adjust-window)
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390 (vip-flash-search-pattern)))
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0
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391 )
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392 (error (beep 1)
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393 (if (or (not (string= click-word previous-search-string))
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394 (not (eq last-command 'vip-mouse-click-search-word)))
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395 (message "`%s': String not found in %s"
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396 vip-s-string (buffer-name (current-buffer)))
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397 (message
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398 "`%s': Last occurrence in %s. Back to beginning of search"
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399 click-word (buffer-name (current-buffer)))
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400 (setq arg 1) ;; to terminate the loop
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401 (sit-for 2))
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402 (setq vip-mouse-click-search-noerror t)
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403 (setq vip-mouse-click-search-limit nil)
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404 (if (and (markerp vip-local-search-start-marker)
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405 (marker-buffer vip-local-search-start-marker))
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406 (goto-char vip-local-search-start-marker))))
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407 (setq arg (1- arg)))
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408 )))
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409
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410 (defun vip-mouse-catch-frame-switch (event arg)
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411 "Catch the event of switching frame.
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412 Usually is bound to a 'down-mouse' event to work properly. See sample
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163
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413 bindings in the Viper manual."
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0
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414 (interactive "e\nP")
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415 (setq vip-frame-of-focus nil)
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416 ;; pass prefix arg along to vip-mouse-click-search/insert-word
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417 (setq prefix-arg arg)
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418 (if (eq last-command 'handle-switch-frame)
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419 (setq vip-frame-of-focus vip-current-frame-saved))
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420 ;; make Emacs forget that it executed vip-mouse-catch-frame-switch
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421 (setq this-command last-command))
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422
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423 ;; Called just before switching frames. Saves the old selected frame.
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424 ;; Sets last-command to handle-switch-frame (this is done automatically in
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425 ;; Emacs.
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426 ;; The semantics of switching frames is different in Emacs and XEmacs.
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427 ;; In Emacs, if you select-frame A while mouse is over frame B and then
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428 ;; start typing, input goes to frame B, which becomes selected.
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429 ;; In XEmacs, input will go to frame A. This may be a bug in one of the
|
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430 ;; Emacsen, but also may be a design decision.
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431 ;; Also, in Emacs sending input to frame B generates handle-switch-frame
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432 ;; event, while in XEmacs it doesn't.
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433 ;; All this accounts for the difference in the behavior of
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434 ;; vip-mouse-click-* commands when you click in a frame other than the one
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435 ;; that was the last to receive input. In Emacs, focus will be in frame A
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436 ;; until you do something other than vip-mouse-click-* command.
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437 ;; In XEmacs, you have to manually select frame B (with the mouse click) in
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438 ;; order to shift focus to frame B.
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439 (defsubst vip-remember-current-frame (frame)
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440 (setq last-command 'handle-switch-frame
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441 vip-current-frame-saved (selected-frame)))
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442
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443
|
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175
|
444 ;;; Local Variables:
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445 ;;; eval: (put 'vip-deflocalvar 'lisp-indent-hook 'defun)
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|
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446 ;;; End:
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447
|
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0
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448
|
|
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449 ;;; viper-mous.el ends here
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