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209
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1 ;;; modeline.el --- modeline hackery.
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2
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3 ;; Copyright (C) 1988, 1992-1994, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995, 1996 Ben Wing.
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5
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Keywords: extensions, dumped
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify it
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12 ;; under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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24 ;; Boston, MA 02111-1307, USA.
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25
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26 ;;; Synched up with: Not in FSF.
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27
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28 ;;; Commentary:
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29
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30 ;; This file is dumped with XEmacs.
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31
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32 ;;; Code:
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33
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34 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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35 ;;; General mouse modeline stuff ;;;
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36 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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37
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38 (defgroup modeline nil
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39 "Modeline customizations"
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40 :group 'environment)
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41
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42 (defcustom drag-modeline-event-lag 150
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43 "*The pause (in msecs) between drag modeline events before redisplaying.
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44 If this value is too small, dragging will be choppy because redisplay cannot
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45 keep up. If it is too large, dragging will be choppy because of the explicit
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46 redisplay delay specified."
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47 :type 'integer
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48 :group 'modeline)
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49
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50 (defcustom modeline-click-swaps-buffers nil
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51 "*If non-nil, clicking on the modeline changes the current buffer.
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52 Click on the left half of the modeline cycles forward through the
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53 buffer list and clicking on the right half cycles backward."
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54 :type 'boolean
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55 :group 'modeline)
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56
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57 (defun mouse-drag-modeline (event)
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58 "Resize a window by dragging its modeline.
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59 This command should be bound to a button-press event in modeline-map.
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60 Holding down a mouse button and moving the mouse up and down will
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61 make the clicked-on window taller or shorter."
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62 (interactive "e")
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63 (or (button-press-event-p event)
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64 (error "%s must be invoked by a mouse-press" this-command))
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65 (or (event-over-modeline-p event)
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66 (error "not over a modeline"))
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67 (let ((done nil)
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68 (depress-line (event-y event))
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69 (start-event-frame (event-frame event))
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70 (start-event-window (event-window event))
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71 (start-nwindows (count-windows t))
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72 (last-timestamp 0)
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73 default-line-height
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74 modeline-height
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75 should-enlarge-minibuffer
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76 event min-height minibuffer y top bot edges wconfig growth)
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77 (setq minibuffer (minibuffer-window start-event-frame)
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78 default-line-height (face-height 'default start-event-window)
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79 min-height (+ (* window-min-height default-line-height)
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80 ;; Don't let the window shrink by a
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81 ;; non-multiple of the default line
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82 ;; height. (enlarge-window -1) will do
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83 ;; this if the difference between the
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84 ;; current window height and the minimum
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85 ;; window height is less than the height
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86 ;; of the default font. These extra
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87 ;; lost pixels of height don't come back
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88 ;; if you grow the window again. This
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89 ;; can make it impossible to drag back
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90 ;; to the exact original size, which is
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91 ;; disconcerting.
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92 (% (window-pixel-height start-event-window)
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93 default-line-height))
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94 modeline-height
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95 (if (specifier-instance has-modeline-p start-event-window)
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96 (+ (face-height 'modeline start-event-window)
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97 (* 2 (specifier-instance modeline-shadow-thickness
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98 start-event-window)))
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99 (* 2 (specifier-instance modeline-shadow-thickness
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100 start-event-window))))
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101 (if (not (eq (window-frame minibuffer) start-event-frame))
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102 (setq minibuffer nil))
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103 (if (and (null minibuffer) (one-window-p t))
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104 (error "Attempt to resize sole window"))
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105 ;; if this is the bottommost ordinary window, then to
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106 ;; move its modeline the minibuffer must be enlarged.
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107 (setq should-enlarge-minibuffer
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108 (and minibuffer (window-lowest-p start-event-window)))
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109 ;; loop reading events
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110 (while (not done)
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111 (setq event (next-event event))
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112 ;; requeue event and quit if this is a misc-user, eval or
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113 ;; keypress event.
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114 ;; quit if this is a button press or release event, or if the event
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115 ;; occurred in some other frame.
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116 ;; drag if this is a mouse motion event and the time
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117 ;; between this event and the last event is greater than
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118 ;; drag-modeline-event-lag.
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119 ;; do nothing if this is any other kind of event.
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120 (cond ((or (misc-user-event-p event)
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121 (key-press-event-p event))
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122 (setq unread-command-events (nconc unread-command-events
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123 (list event))
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124 done t))
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125 ((button-release-event-p event)
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126 (setq done t)
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127 (if modeline-click-swaps-buffers
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128 (mouse-release-modeline event depress-line)))
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129 ((button-event-p event)
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130 (setq done t))
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131 ((not (motion-event-p event))
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132 (dispatch-event event))
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133 ((not (eq start-event-frame (event-frame event)))
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134 (setq done t))
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135 ((< (abs (- (event-timestamp event) last-timestamp))
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136 drag-modeline-event-lag)
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137 nil)
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138 (t
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139 (setq last-timestamp (event-timestamp event)
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140 y (event-y-pixel event)
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141 edges (window-pixel-edges start-event-window)
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142 top (nth 1 edges)
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143 bot (nth 3 edges))
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144 ;; scale back a move that would make the
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145 ;; window too short.
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146 (cond ((< (- y top (- modeline-height)) min-height)
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147 (setq y (+ top min-height (- modeline-height)))))
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148 ;; compute size change needed
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149 (setq growth (- y bot (/ (- modeline-height) 2))
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150 wconfig (current-window-configuration))
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151 ;; grow/shrink minibuffer?
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152 (if should-enlarge-minibuffer
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153 (progn
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154 ;; yes. scale back shrinkage if it
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155 ;; would make the minibuffer less than 1
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156 ;; line tall.
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157 ;;
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158 ;; also flip the sign of the computed growth,
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159 ;; since if we want to grow the window with the
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160 ;; modeline we need to shrink the minibuffer
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161 ;; and vice versa.
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162 (if (and (> growth 0)
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163 (< (- (window-pixel-height minibuffer)
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164 growth)
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165 default-line-height))
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166 (setq growth
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167 (- (window-pixel-height minibuffer)
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168 default-line-height)))
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169 (setq growth (- growth))))
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170 ;; window grow and shrink by lines not pixels, so
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171 ;; divide the pixel height by the height of the
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172 ;; default face.
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173 (setq growth (/ growth default-line-height))
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174 ;; grow/shrink the window
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175 (enlarge-window growth nil (if should-enlarge-minibuffer
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176 minibuffer
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177 start-event-window))
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178 ;; if this window's growth caused another
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179 ;; window to be deleted because it was too
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180 ;; short, rescind the change.
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181 ;;
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182 ;; if size change caused space to be stolen
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183 ;; from a window above this one, rescind the
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184 ;; change, but only if we didn't grow/shrink
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185 ;; the minibuffer. minibuffer size changes
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186 ;; can cause all windows to shrink... no way
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187 ;; around it.
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188 (if (or (/= start-nwindows (count-windows t))
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189 (and (not should-enlarge-minibuffer)
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190 (/= top (nth 1 (window-pixel-edges
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191 start-event-window)))))
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192 (set-window-configuration wconfig)))))))
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193
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194 ;; from Bob Weiner (bob_weiner@pts.mot.com)
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195 (defun mouse-release-modeline (event line-num)
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196 "Handle modeline click EVENT on LINE-NUM by switching buffers.
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197 If click on left half of a frame's modeline, bury current buffer.
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198 If click on right half of a frame's modeline, raise bottommost buffer.
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199 Args are: EVENT, the mouse release event, and LINE-NUM, the line number
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200 within the frame at which the mouse was first depressed."
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201 (if (= line-num (event-y event))
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202 ;; Button press and release are at same line, treat this as
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203 ;; a click and switch buffers.
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204 (if (< (event-x event) (/ (window-width (event-window event)) 2))
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205 ;; On left half of modeline, bury current buffer,
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206 ;; displaying second buffer on list.
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207 (mouse-bury-buffer event)
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208 ;; On right half of modeline, raise and display bottommost
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209 ;; buffer in buffer list.
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210 (mouse-unbury-buffer event))))
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211
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212 (defconst modeline-menu
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213 '("Window Commands"
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214 ["Delete Window Above" delete-window t]
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215 ["Delete Other Windows" delete-other-windows t]
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216 ["Split Window Above" split-window-vertically t]
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217 ["Split Window Horizontally" split-window-horizontally t]
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218 ["Balance Windows" balance-windows t]
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219 ))
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220
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221 (defun modeline-menu (event)
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222 (interactive "e")
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223 (popup-menu-and-execute-in-window
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224 (cons (format "Window Commands for %S:"
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225 (buffer-name (event-buffer event)))
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226 (cdr modeline-menu))
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227 event))
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228
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229 (defvar modeline-map (make-sparse-keymap 'modeline-map)
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230 "Keymap consulted for mouse-clicks on the modeline of a window.
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231 This variable may be buffer-local; its value will be looked up in
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232 the buffer of the window whose modeline was clicked upon.")
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233
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234 (define-key modeline-map 'button1 'mouse-drag-modeline)
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235 ;; button2 selects the window without setting point
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236 (define-key modeline-map 'button2 (lambda () (interactive "@")))
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237 (define-key modeline-map 'button3 'modeline-menu)
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238
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239 (make-face 'modeline-mousable "Face for mousable portions of the modeline.")
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240 (set-face-parent 'modeline-mousable 'modeline)
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241 (when (featurep 'x)
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242 (set-face-foreground 'modeline-mousable "firebrick" 'global '(color x))
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243 (set-face-font 'modeline-mousable [bold] nil '(mono x))
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244 (set-face-font 'modeline-mousable [bold] nil '(grayscale x)))
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245
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246 (defmacro make-modeline-command-wrapper (command)
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247 `#'(lambda (event)
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248 (interactive "e")
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249 (save-selected-window
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250 (select-window (event-window event))
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251 (call-interactively ',(eval command)))))
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252
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253 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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254 ;;; Minor modes ;;;
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255 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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256
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257 (defvar minor-mode-alist nil
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258 "Alist saying how to show minor modes in the modeline.
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259 Each element looks like (VARIABLE STRING);
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260 STRING is included in the modeline iff VARIABLE's value is non-nil.
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261
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262 Actually, STRING need not be a string; any possible modeline element
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263 is okay. See `modeline-format'.")
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264
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265 ;; Used by C code (lookup-key and friends) but defined here.
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266 (defvar minor-mode-map-alist nil
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267 "Alist of keymaps to use for minor modes.
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268 Each element looks like (VARIABLE . KEYMAP); KEYMAP is used to read
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269 key sequences and look up bindings iff VARIABLE's value is non-nil.
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270 If two active keymaps bind the same key, the keymap appearing earlier
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271 in the list takes precedence.")
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272
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273 (make-face 'modeline-mousable-minor-mode
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274 "Face for mousable minor-mode strings in the modeline.")
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275 (set-face-parent 'modeline-mousable-minor-mode 'modeline-mousable)
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276 (when (featurep 'x)
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277 (set-face-foreground 'modeline-mousable-minor-mode
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278 '(((color x) . "green4")
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279 ((color x) . "forestgreen")) 'global))
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280
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281 (defvar modeline-mousable-minor-mode-extent (make-extent nil nil)
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282 ;; alliteration at its finest.
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283 "Extent managing the mousable minor mode modeline strings.")
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284 (set-extent-face modeline-mousable-minor-mode-extent
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285 'modeline-mousable-minor-mode)
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286
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287 ;; This replaces the idiom
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288 ;;
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289 ;; (or (assq 'isearch-mode minor-mode-alist)
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290 ;; (setq minor-mode-alist
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291 ;; (purecopy
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292 ;; (append minor-mode-alist
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293 ;; '((isearch-mode isearch-mode))))))
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294
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295 (defvar place)
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296 (defun add-minor-mode (toggle name &optional keymap after toggle-fun)
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297 "Add a minor mode to `minor-mode-alist' and `minor-mode-map-alist'.
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298 TOGGLE is a symbol whose value as a variable specifies whether the
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299 minor mode is active. NAME is the name that should appear in the
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300 modeline (it should either be a string beginning with a space or a
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301 symbol). KEYMAP is a keymap to make active when the minor mode is
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302 active. AFTER is the toggling symbol used for another minor mode. If
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303 AFTER is non-nil, then it is used to position the new mode in the
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304 minor-mode alists. TOGGLE-FUN specifies an interactive function that
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305 is called to toggle the mode on and off; this affects what happens
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306 when button2 is pressed on the mode, and when button3 is pressed
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307 somewhere in the list of modes. If TOGGLE-FUN is nil and TOGGLE names
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308 an interactive function, TOGGLE is used as the toggle function.
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309
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310 Example: (add-minor-mode 'view-minor-mode \" View\" view-mode-map)"
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311 (let (el place
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312 (add-elt #'(lambda (elt sym)
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313 (cond ((null after) ; add to front
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314 (set sym (cons elt (symbol-value sym))))
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315 ((and (not (eq after t))
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316 (setq place (memq (assq after
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317 (symbol-value sym))
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318 (symbol-value sym))))
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319 (setq elt (cons elt (cdr place)))
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320 (setcdr place elt))
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321 (t
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322 (set sym (append (symbol-value sym) (list elt))))
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323 )
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324 (symbol-value sym)))
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325 toggle-keymap)
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326 (if toggle-fun
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327 (if (not (commandp toggle-fun))
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328 (error "not an interactive function: %S" toggle-fun))
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329 (if (commandp toggle)
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330 (setq toggle-fun toggle)))
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331 (if (and toggle-fun name)
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332 (progn
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333 (setq toggle-keymap (make-sparse-keymap
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334 (intern (concat "modeline-minor-"
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335 (symbol-name toggle)
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336 "-map"))))
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337 (define-key toggle-keymap 'button2
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338 ;; defeat the DUMB-ASS byte-compiler, which tries to
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339 ;; expand the macro at compile time and fucks up.
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340 (eval '(make-modeline-command-wrapper toggle-fun)))
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341 (put toggle 'modeline-toggle-function toggle-fun)))
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342 (and name
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343 (let ((hacked-name
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344 (if toggle-keymap
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345 (cons (let ((extent (make-extent nil nil)))
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346 (set-extent-keymap extent toggle-keymap)
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347 (set-extent-property
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348 extent 'help-echo
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349 (concat "button2 turns off "
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350 (if (symbolp toggle-fun)
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351 (symbol-name toggle-fun)
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352 (symbol-name toggle))))
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353 extent)
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354 (cons
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355 modeline-mousable-minor-mode-extent
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356 name))
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357 name)))
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358 (if (setq el (assq toggle minor-mode-alist))
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359 (setcdr el (list hacked-name))
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360 (funcall add-elt
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361 (list toggle hacked-name)
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362 'minor-mode-alist))))
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363 (and keymap
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364 (if (setq el (assq toggle minor-mode-map-alist))
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365 (setcdr el keymap)
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366 (funcall add-elt
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367 (cons toggle keymap)
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368 'minor-mode-map-alist)))
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369 ))
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370
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371 (add-minor-mode 'abbrev-mode " Abbrev")
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372 (add-minor-mode 'overwrite-mode 'overwrite-mode)
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373 (add-minor-mode 'auto-fill-function " Fill" nil nil 'auto-fill-mode)
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374 ;; not really a minor mode...
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375 (add-minor-mode 'defining-kbd-macro " Def")
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376
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377 (defun modeline-minor-mode-menu (event)
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378 (interactive "e")
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379 (save-excursion
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380 (set-buffer (event-buffer event))
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381 (popup-menu-and-execute-in-window
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382 (cons (format "Minor Mode Commands for %S:"
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383 (buffer-name (event-buffer event)))
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384 (apply 'nconc
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385 (mapcar
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386 #'(lambda (x)
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387 (let* ((toggle-sym (car x))
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388 (toggle-fun
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389 (or (get toggle-sym
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390 'modeline-toggle-function)
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391 (and (fboundp toggle-sym)
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392 (commandp toggle-sym)
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393 toggle-sym))))
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394 (if (not toggle-fun) nil
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395 (list (vector
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396 (concat (if (and (boundp toggle-sym)
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397 (symbol-value toggle-sym))
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398 "turn off " "turn on ")
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399 (if (symbolp toggle-fun)
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400 (symbol-name toggle-fun)
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401 (symbol-name toggle-sym)))
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402
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403 toggle-fun
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404 t)))))
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405 minor-mode-alist)))
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406 event)))
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407
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408 (defvar modeline-minor-mode-map (make-sparse-keymap 'modeline-minor-mode-map)
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409 "Keymap consulted for mouse-clicks on the minor-mode modeline list.")
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410 (define-key modeline-minor-mode-map 'button3 'modeline-minor-mode-menu)
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411
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412 (defvar modeline-minor-mode-extent (make-extent nil nil)
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413 "Extent covering the minor mode modeline strings.")
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414 (set-extent-face modeline-minor-mode-extent 'modeline-mousable)
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415 (set-extent-keymap modeline-minor-mode-extent modeline-minor-mode-map)
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416
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417
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418 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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419 ;;; Other ;;;
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420 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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421
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422 (defun modeline-buffers-menu (event)
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423 (interactive "e")
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424 (popup-menu-and-execute-in-window
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425 '("Buffers Popup Menu"
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426 :filter buffers-menu-filter
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427 ["List All Buffers" list-buffers t]
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428 "--"
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429 )
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430 event))
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431
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432 (defvar modeline-buffer-id-left-map
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433 (make-sparse-keymap 'modeline-buffer-id-left-map)
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434 "Keymap consulted for mouse-clicks on the left half of the buffer-id string.")
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435
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436 (defvar modeline-buffer-id-right-map
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437 (make-sparse-keymap 'modeline-buffer-id-right-map)
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438 "Keymap consulted for mouse-clicks on the right half of the buffer-id string.")
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439
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440 (define-key modeline-buffer-id-left-map 'button2 'mouse-unbury-buffer)
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441 (define-key modeline-buffer-id-right-map 'button2 'mouse-bury-buffer)
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442 (define-key modeline-buffer-id-left-map 'button3 'modeline-buffers-menu)
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443 (define-key modeline-buffer-id-right-map 'button3 'modeline-buffers-menu)
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444
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445 (make-face 'modeline-buffer-id
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446 "Face for the buffer ID string in the modeline.")
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447 (set-face-parent 'modeline-buffer-id 'modeline)
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448 (when (featurep 'x)
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449 (set-face-foreground 'modeline-buffer-id "blue4" 'global '(color x)))
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450 (when (featurep 'x)
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451 (set-face-font 'modeline-buffer-id [bold-italic] nil '(mono x))
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452 (set-face-font 'modeline-buffer-id [bold-italic] nil '(grayscale x)))
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453 (when (featurep 'tty)
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454 (set-face-font 'modeline-buffer-id [bold-italic] nil 'tty))
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455
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456 (defvar modeline-buffer-id-extent (make-extent nil nil)
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457 "Extent covering the whole of the buffer-id string.")
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458 (set-extent-face modeline-buffer-id-extent 'modeline-buffer-id)
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459
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460 (defvar modeline-buffer-id-left-extent (make-extent nil nil)
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461 "Extent covering the left half of the buffer-id string.")
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462 (set-extent-keymap modeline-buffer-id-left-extent
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463 modeline-buffer-id-left-map)
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464 (set-extent-property modeline-buffer-id-left-extent 'help-echo
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465 "button2 cycles to the previous buffer")
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466
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467 (defvar modeline-buffer-id-right-extent (make-extent nil nil)
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468 "Extent covering the right half of the buffer-id string.")
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469 (set-extent-keymap modeline-buffer-id-right-extent
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470 modeline-buffer-id-right-map)
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471 (set-extent-property modeline-buffer-id-right-extent 'help-echo
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472 "button2 cycles to the next buffer")
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473
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474 (defconst modeline-buffer-identification
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475 (list (cons modeline-buffer-id-left-extent (purecopy "XEmacs%N:"))
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476 ; this used to be "XEmacs:"
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477 (cons modeline-buffer-id-right-extent (purecopy " %17b")))
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478 "Modeline control for identifying the buffer being displayed.
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479 Its default value is \"XEmacs: %17b\" (NOT!). Major modes that edit things
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480 other than ordinary files may change this (e.g. Info, Dired,...)")
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481 (make-variable-buffer-local 'modeline-buffer-identification)
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482
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483 (defconst modeline-process nil
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484 "Modeline control for displaying info on process status.
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485 Normally nil in most modes, since there is no process to display.")
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486 (make-variable-buffer-local 'modeline-process)
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487
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488 (defvar modeline-modified-map (make-sparse-keymap 'modeline-modified-map)
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489 "Keymap consulted for mouse-clicks on the modeline-modified string.")
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490 (define-key modeline-modified-map 'button2
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491 (make-modeline-command-wrapper 'modeline-toggle-read-only))
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492
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493 (defvar modeline-modified-extent (make-extent nil nil)
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494 "Extent covering the modeline-modified string.")
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495 (set-extent-face modeline-modified-extent 'modeline-mousable)
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496 (set-extent-keymap modeline-modified-extent modeline-modified-map)
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497 (set-extent-property modeline-modified-extent 'help-echo
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498 "button2 toggles the buffer's read-only status")
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499
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500 (defconst modeline-modified (purecopy '("--%1*%1+-"))
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501 "Modeline control for displaying whether current buffer is modified.")
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502 (make-variable-buffer-local 'modeline-modified)
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503
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504 (defvar modeline-narrowed-map (make-sparse-keymap 'modeline-narrowed-map)
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505 "Keymap consulted for mouse-clicks on the modeline-narrowed string.")
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506 (define-key modeline-narrowed-map 'button2
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507 (make-modeline-command-wrapper 'widen))
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508
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509 (defvar modeline-narrowed-extent (make-extent nil nil)
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510 "Extent covering the modeline-narrowed string.")
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511 (set-extent-face modeline-narrowed-extent 'modeline-mousable)
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512 (set-extent-keymap modeline-narrowed-extent modeline-narrowed-map)
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513 (set-extent-property modeline-narrowed-extent 'help-echo
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514 "button2 widens the buffer")
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515
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516 (setq-default
|
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517 modeline-format
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518 (list
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519 (purecopy "")
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520 (cons modeline-modified-extent 'modeline-modified)
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521 (cons modeline-buffer-id-extent 'modeline-buffer-identification)
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522 (purecopy " ")
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523 'global-mode-string
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524 (purecopy " %[(")
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525 (cons modeline-minor-mode-extent (list "" 'mode-name 'minor-mode-alist))
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526 (cons modeline-narrowed-extent "%n")
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527 'modeline-process
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|
528 (purecopy ")%]----")
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529 (purecopy '(line-number-mode "L%l--"))
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|
530 (purecopy '(column-number-mode "C%c--"))
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|
531 (purecopy '(-3 . "%p"))
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532 (purecopy "-%-")))
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533
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534 ;;; Added for XEmacs 20.3. Provide wrapper for vc since it may not always be
|
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|
535 ;;; present, and its symbols are not visible this early in the dump if it
|
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|
536 ;;; is.
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537
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538 (defun modeline-toggle-read-only ()
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|
539 "Change whether this buffer is visiting its file read-only.
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|
|
540 With arg, set read-only iff arg is positive.
|
|
|
541 This function is designed to be called when the read-only indicator on the
|
|
|
542 modeline is clicked. It will call `vc-toggle-read-only' if available,
|
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|
543 otherwise it will call the usual `toggle-read-only'."
|
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|
544 (interactive)
|
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|
545 (if (fboundp 'vc-toggle-read-only)
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546 (vc-toggle-read-only)
|
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|
547 (toggle-read-only)))
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548
|
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549 ;;; modeline.el ends here
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