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1 ;;; modeline.el --- modeline hackery.
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2
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3 ;; Copyright (C) 1988, 1992, 1993, 1994 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 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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16
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19 ;; along with XEmacs; see the file COPYING. If not, write to the
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70
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20 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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21 ;; Boston, MA 02111-1307, USA.
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22
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23 ;;; Synched up with: Not in FSF.
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24
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25 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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26 ;;; General mouse modeline stuff ;;;
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27 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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28
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120
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29 (defgroup modeline nil
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30 "Modeline customizations"
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31 :group 'environment)
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32
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120
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33 (defcustom drag-modeline-event-lag 150
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34 "*The pause (in msecs) between drag modeline events before redisplaying.
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35 If this value is too small, dragging will be choppy because redisplay cannot
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36 keep up. If it is too large, dragging will be choppy because of the explicit
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37 redisplay delay specified."
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38 :type 'integer
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39 :group 'modeline)
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40
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41 (defcustom modeline-click-swaps-buffers nil
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42 "*If non-nil, clicking on the modeline changes the current buffer.
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43 Click on the left half of the modeline cycles forward through the
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120
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44 buffer list and clicking on the right half cycles backward."
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45 :type 'boolean
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46 :group 'modeline)
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47
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48 (defun mouse-drag-modeline (event)
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149
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49 "Resize a window by dragging its modeline.
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50 This command should be bound to a button-press event in modeline-map.
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51 Holding down a mouse button and moving the mouse up and down will
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52 make the clicked-on window taller or shorter."
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53 (interactive "e")
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54 (or (button-press-event-p event)
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55 (error "%s must be invoked by a mouse-press" this-command))
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56 (or (event-over-modeline-p event)
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57 (error "not over a modeline"))
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149
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58 (let ((done nil)
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59 (depress-line (event-y event))
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60 (start-event-frame (event-frame event))
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61 (start-event-window (event-window event))
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62 (start-nwindows (count-windows t))
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63 (last-timestamp 0)
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64 default-line-height
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65 modeline-height
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66 should-enlarge-minibuffer
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67 event min-height minibuffer y top bot edges wconfig growth)
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68 (setq minibuffer (minibuffer-window start-event-frame)
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69 default-line-height (face-height 'default start-event-window)
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70 min-height (* window-min-height default-line-height)
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71 modeline-height
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72 (if (specifier-instance has-modeline-p start-event-window)
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73 (+ (face-height 'modeline start-event-window)
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74 (* 2 (specifier-instance modeline-shadow-thickness
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75 start-event-window)))
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76 (* 2 (specifier-instance modeline-shadow-thickness
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77 start-event-window))))
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78 (if (not (eq (window-frame minibuffer) start-event-frame))
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79 (setq minibuffer nil))
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80 (if (and (null minibuffer) (one-window-p t))
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81 (error "Attempt to resize sole window"))
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82 ;; if this is the bottommost ordinary window, then to
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83 ;; move its modeline the minibuffer must be enlarged.
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84 (setq should-enlarge-minibuffer
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85 (and minibuffer (window-lowest-p start-event-window)))
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86 ;; loop reading events
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87 (while (not done)
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88 (setq event (next-event event))
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149
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89 ;; requeue event and quit if this is a misc-user, eval or
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90 ;; keypress event.
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91 ;; quit if this is a button press or release event, or if the event
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92 ;; occurred in some other frame.
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93 ;; drag if this is a mouse motion event and the time
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94 ;; between this event and the last event is greater than
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95 ;; drag-modeline-event-lag.
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96 ;; do nothing if this is any other kind of event.
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97 (cond ((or (misc-user-event-p event)
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173
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98 (key-press-event-p event))
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149
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99 (setq unread-command-events (nconc unread-command-events
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100 (list event))
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101 done t))
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102 ((button-release-event-p event)
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149
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103 (setq done t)
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104 (if modeline-click-swaps-buffers
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105 (mouse-release-modeline event depress-line)))
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149
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106 ((button-event-p event)
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107 (setq done t))
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108 ((timeout-event-p event)
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109 nil)
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110 ((not (motion-event-p event))
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111 (dispatch-event event))
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112 ((not (eq start-event-frame (event-frame event)))
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113 (setq done t))
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114 ((< (abs (- (event-timestamp event) last-timestamp))
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115 drag-modeline-event-lag)
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116 nil)
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117 (t
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149
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118 (setq last-timestamp (event-timestamp event)
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119 y (event-y-pixel event)
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120 edges (window-pixel-edges start-event-window)
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121 top (nth 1 edges)
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122 bot (nth 3 edges))
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123 ;; scale back a move that would make the
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124 ;; window too short.
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125 (cond ((< (- y top (- modeline-height)) min-height)
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126 (setq y (+ top min-height (- modeline-height)))))
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127 ;; compute size change needed
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128 (setq growth (- y bot (/ (- modeline-height) 2))
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129 wconfig (current-window-configuration))
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130 ;; grow/shrink minibuffer?
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131 (if should-enlarge-minibuffer
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132 (progn
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133 ;; yes. scale back shrinkage if it
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134 ;; would make the minibuffer less than 1
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135 ;; line tall.
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136 ;;
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137 ;; also flip the sign of the computed growth,
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138 ;; since if we want to grow the window with the
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139 ;; modeline we need to shrink the minibuffer
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140 ;; and vice versa.
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141 (if (and (> growth 0)
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142 (< (- (window-pixel-height minibuffer)
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143 growth)
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144 default-line-height))
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145 (setq growth
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146 (- (window-pixel-height minibuffer)
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147 default-line-height)))
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148 (setq growth (- growth))))
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149 ;; window grow and shrink by lines not pixels, so
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150 ;; divide the pixel height by the height of the
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151 ;; default face.
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152 (setq growth (/ growth default-line-height))
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153 ;; grow/shrink the window
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154 (enlarge-window growth nil (if should-enlarge-minibuffer
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155 minibuffer
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156 start-event-window))
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157 ;; if this window's growth caused another
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158 ;; window to be deleted because it was too
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159 ;; short, rescind the change.
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160 ;;
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161 ;; if size change caused space to be stolen
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162 ;; from a window above this one, rescind the
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163 ;; change, but only if we didn't grow/shrink
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164 ;; the minibuffer. minibuffer size changes
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165 ;; can cause all windows to shrink... no way
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166 ;; around it.
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167 (if (or (/= start-nwindows (count-windows t))
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168 (and (not should-enlarge-minibuffer)
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169 (/= top (nth 1 (window-pixel-edges
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170 start-event-window)))))
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171 (set-window-configuration wconfig)))))))
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172
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173 ;; from Bob Weiner (bob_weiner@pts.mot.com)
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174 (defun mouse-release-modeline (event line-num)
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175 "Handle modeline click EVENT on LINE-NUM by switching buffers.
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176 If click on left half of a frame's modeline, bury current buffer.
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177 If click on right half of a frame's modeline, raise bottommost buffer.
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178 Args are: EVENT, the mouse release event, and LINE-NUM, the line number
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179 within the frame at which the mouse was first depressed."
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180 (if (= line-num (event-y event))
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181 ;; Button press and release are at same line, treat this as
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182 ;; a click and switch buffers.
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183 (if (< (event-x event) (/ (window-width (event-window event)) 2))
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184 ;; On left half of modeline, bury current buffer,
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185 ;; displaying second buffer on list.
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186 (mouse-bury-buffer event)
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187 ;; On right half of modeline, raise and display bottommost
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188 ;; buffer in buffer list.
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189 (mouse-unbury-buffer event))))
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190
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191 (defconst modeline-menu
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192 '("Window Commands"
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193 ["Delete Window Above" delete-window t]
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194 ["Delete Other Windows" delete-other-windows t]
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195 ["Split Window Above" split-window-vertically t]
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196 ["Split Window Horizontally" split-window-horizontally t]
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197 ["Balance Windows" balance-windows t]
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198 ))
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199
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200 (defun modeline-menu (event)
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201 (interactive "e")
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202 (popup-menu-and-execute-in-window
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203 (cons (format "Window Commands for %S:"
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204 (buffer-name (event-buffer event)))
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205 (cdr modeline-menu))
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206 event))
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207
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208 (defvar modeline-map (make-sparse-keymap 'modeline-map)
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209 "Keymap consulted for mouse-clicks on the modeline of a window.
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210 This variable may be buffer-local; its value will be looked up in
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211 the buffer of the window whose modeline was clicked upon.")
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212
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213 (define-key modeline-map 'button1 'mouse-drag-modeline)
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214 ;; button2 selects the window without setting point
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215 (define-key modeline-map 'button2 (lambda () (interactive "@")))
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216 (define-key modeline-map 'button3 'modeline-menu)
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217
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218 (make-face 'modeline-mousable "Face for mousable portions of the modeline.")
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219
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220 (defmacro make-modeline-command-wrapper (command)
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221 `#'(lambda (event)
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222 (interactive "e")
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223 (save-selected-window
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224 (select-window (event-window event))
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225 (call-interactively ',(eval command)))))
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226
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227 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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228 ;;; Minor modes ;;;
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229 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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230
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231 (defvar minor-mode-alist nil
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232 "Alist saying how to show minor modes in the modeline.
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233 Each element looks like (VARIABLE STRING);
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234 STRING is included in the modeline iff VARIABLE's value is non-nil.
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235
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236 Actually, STRING need not be a string; any possible modeline element
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237 is okay. See `modeline-format'.")
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238
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239 ;; Used by C code (lookup-key and friends) but defined here.
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240 (defvar minor-mode-map-alist nil
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241 "Alist of keymaps to use for minor modes.
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242 Each element looks like (VARIABLE . KEYMAP); KEYMAP is used to read
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243 key sequences and look up bindings iff VARIABLE's value is non-nil.
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244 If two active keymaps bind the same key, the keymap appearing earlier
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245 in the list takes precedence.")
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246
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247 (make-face 'modeline-mousable-minor-mode
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248 "Face for mousable minor-mode strings in the modeline.")
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249
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250 (defvar modeline-mousable-minor-mode-extent (make-extent nil nil)
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251 ;; alliteration at its finest.
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252 "Extent managing the mousable minor mode modeline strings.")
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253 (set-extent-face modeline-mousable-minor-mode-extent
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254 'modeline-mousable-minor-mode)
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255
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256 ;; This replaces the idiom
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257 ;;
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258 ;; (or (assq 'isearch-mode minor-mode-alist)
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259 ;; (setq minor-mode-alist
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260 ;; (purecopy
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261 ;; (append minor-mode-alist
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262 ;; '((isearch-mode isearch-mode))))))
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263
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264 (defun add-minor-mode (toggle name &optional keymap after toggle-fun)
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265 "Add a minor mode to `minor-mode-alist' and `minor-mode-map-alist'.
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266 TOGGLE is a symbol whose value as a variable specifies whether the
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267 minor mode is active. NAME is the name that should appear in the
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268 modeline (it should be a string beginning with a space). KEYMAP is a
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269 keymap to make active when the minor mode is active. AFTER is the
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270 toggling symbol used for another minor mode. If AFTER is non-nil,
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271 then it is used to position the new mode in the minor-mode alists.
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272 TOGGLE-FUN specifies an interactive function that is called to toggle
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273 the mode on and off; this affects what happens when button2 is pressed
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274 on the mode, and when button3 is pressed somewhere in the list of
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275 modes. If TOGGLE-FUN is nil and TOGGLE names an interactive function,
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276 TOGGLE is used as the toggle function.
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277
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278 Example: (add-minor-mode 'view-minor-mode \" View\" view-mode-map)"
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279 (let (el place
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280 (add-elt #'(lambda (elt sym)
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281 (cond ((null after) ; add to front
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282 (set sym (cons elt (symbol-value sym))))
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283 ((and (not (eq after t))
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284 (setq place (memq (assq after
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285 (symbol-value sym))
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286 (symbol-value sym))))
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287 (setq elt (cons elt (cdr place)))
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288 (setcdr place elt))
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289 (t
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290 (set sym (append (symbol-value sym) (list elt))))
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291 )
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292 (symbol-value sym)))
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293 toggle-keymap)
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294 (if toggle-fun
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295 (if (not (commandp toggle-fun))
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296 (error "not an interactive function: %S" toggle-fun))
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297 (if (commandp toggle)
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298 (setq toggle-fun toggle)))
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299 (if (and toggle-fun name)
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300 (progn
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301 (setq toggle-keymap (make-sparse-keymap
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302 (intern (concat "modeline-minor-"
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303 (symbol-name toggle)
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304 "-map"))))
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305 (define-key toggle-keymap 'button2
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306 ;; defeat the DUMB-ASS byte-compiler, which tries to
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307 ;; expand the macro at compile time and fucks up.
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308 (eval '(make-modeline-command-wrapper toggle-fun)))
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309 (put toggle 'modeline-toggle-function toggle-fun)))
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310 (and name
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311 (let ((hacked-name
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312 (if toggle-keymap
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313 (cons (let ((extent (make-extent nil nil)))
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314 (set-extent-keymap extent toggle-keymap)
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315 (set-extent-property
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316 extent 'help-echo
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317 (concat "button2 turns off "
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318 (if (symbolp toggle-fun)
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319 (symbol-name toggle-fun)
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320 (symbol-name toggle))))
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321 extent)
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322 (cons
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323 modeline-mousable-minor-mode-extent
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324 name))
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325 name)))
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326 (if (setq el (assq toggle minor-mode-alist))
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327 (setcdr el (list hacked-name))
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328 (funcall add-elt
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329 (list toggle hacked-name)
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330 'minor-mode-alist))))
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331 (and keymap
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332 (if (setq el (assq toggle minor-mode-map-alist))
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333 (setcdr el keymap)
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334 (funcall add-elt
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335 (cons toggle keymap)
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336 'minor-mode-map-alist)))
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337 ))
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338
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339 (add-minor-mode 'abbrev-mode " Abbrev")
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340 (add-minor-mode 'overwrite-mode 'overwrite-mode)
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341 (add-minor-mode 'auto-fill-function " Fill" nil nil 'auto-fill-mode)
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342 ;; not really a minor mode...
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343 (add-minor-mode 'defining-kbd-macro " Def")
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344
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345 (defun modeline-minor-mode-menu (event)
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346 (interactive "e")
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110
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347 (save-excursion
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348 (set-buffer (event-buffer event))
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349 (popup-menu-and-execute-in-window
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350 (cons (format "Minor Mode Commands for %S:"
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351 (buffer-name (event-buffer event)))
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352 (apply 'nconc
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353 (mapcar
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354 #'(lambda (x)
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355 (let* ((toggle-sym (car x))
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356 (toggle-fun
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357 (or (get toggle-sym
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358 'modeline-toggle-function)
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359 (and (fboundp toggle-sym)
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360 (commandp toggle-sym)
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361 toggle-sym))))
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362 (if (not toggle-fun) nil
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363 (list (vector
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364 (concat (if (and (boundp toggle-sym)
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365 (symbol-value toggle-sym))
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366 "turn off " "turn on ")
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367 (if (symbolp toggle-fun)
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368 (symbol-name toggle-fun)
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369 (symbol-name toggle-sym)))
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370
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371 toggle-fun
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372 t)))))
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373 minor-mode-alist)))
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374 event)))
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0
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375
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376 (defvar modeline-minor-mode-map (make-sparse-keymap 'modeline-minor-mode-map)
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377 "Keymap consulted for mouse-clicks on the minor-mode modeline list.")
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378 (define-key modeline-minor-mode-map 'button3 'modeline-minor-mode-menu)
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379
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380 (defvar modeline-minor-mode-extent (make-extent nil nil)
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381 "Extent covering the minor mode modeline strings.")
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382 (set-extent-face modeline-minor-mode-extent 'modeline-mousable)
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383 (set-extent-keymap modeline-minor-mode-extent modeline-minor-mode-map)
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384
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385
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386 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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387 ;;; Other ;;;
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388 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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389
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390 (defun modeline-buffers-menu (event)
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391 (interactive "e")
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392 (popup-menu-and-execute-in-window
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393 '("Buffers Popup Menu"
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394 :filter buffers-menu-filter
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395 ["List All Buffers" list-buffers t]
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396 "--"
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397 )
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398 event))
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399
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400 (defvar modeline-buffer-id-left-map
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401 (make-sparse-keymap 'modeline-buffer-id-left-map)
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402 "Keymap consulted for mouse-clicks on the left half of the buffer-id string.")
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403
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404 (defvar modeline-buffer-id-right-map
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405 (make-sparse-keymap 'modeline-buffer-id-right-map)
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406 "Keymap consulted for mouse-clicks on the right half of the buffer-id string.")
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407
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408 (define-key modeline-buffer-id-left-map 'button2 'mouse-unbury-buffer)
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409 (define-key modeline-buffer-id-right-map 'button2 'mouse-bury-buffer)
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410 (define-key modeline-buffer-id-left-map 'button3 'modeline-buffers-menu)
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411 (define-key modeline-buffer-id-right-map 'button3 'modeline-buffers-menu)
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412
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413 (make-face 'modeline-buffer-id
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414 "Face for the buffer ID string in the modeline.")
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415
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416 (defvar modeline-buffer-id-extent (make-extent nil nil)
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417 "Extent covering the whole of the buffer-id string.")
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418 (set-extent-face modeline-buffer-id-extent 'modeline-buffer-id)
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419
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420 (defvar modeline-buffer-id-left-extent (make-extent nil nil)
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421 "Extent covering the left half of the buffer-id string.")
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422 (set-extent-keymap modeline-buffer-id-left-extent
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423 modeline-buffer-id-left-map)
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424 (set-extent-property modeline-buffer-id-left-extent 'help-echo
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425 "button2 cycles to the previous buffer")
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426
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427 (defvar modeline-buffer-id-right-extent (make-extent nil nil)
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428 "Extent covering the right half of the buffer-id string.")
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429 (set-extent-keymap modeline-buffer-id-right-extent
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430 modeline-buffer-id-right-map)
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431 (set-extent-property modeline-buffer-id-right-extent 'help-echo
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432 "button2 cycles to the next buffer")
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433
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434 (defconst modeline-buffer-identification
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149
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435 (list (cons modeline-buffer-id-left-extent (purecopy "XEmacs%N:"))
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436 ; this used to be "XEmacs:"
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0
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437 (cons modeline-buffer-id-right-extent (purecopy " %17b")))
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438 "Modeline control for identifying the buffer being displayed.
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439 Its default value is \"XEmacs: %17b\" (NOT!). Major modes that edit things
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440 other than ordinary files may change this (e.g. Info, Dired,...)")
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441 (make-variable-buffer-local 'modeline-buffer-identification)
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442
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443 (defconst modeline-process nil
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444 "Modeline control for displaying info on process status.
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445 Normally nil in most modes, since there is no process to display.")
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446 (make-variable-buffer-local 'modeline-process)
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447
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448 (defvar modeline-modified-map (make-sparse-keymap 'modeline-modified-map)
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449 "Keymap consulted for mouse-clicks on the modeline-modified string.")
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450 (define-key modeline-modified-map 'button2
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98
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451 (make-modeline-command-wrapper 'vc-toggle-read-only))
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0
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452
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453 (defvar modeline-modified-extent (make-extent nil nil)
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454 "Extent covering the modeline-modified string.")
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455 (set-extent-face modeline-modified-extent 'modeline-mousable)
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456 (set-extent-keymap modeline-modified-extent modeline-modified-map)
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457 (set-extent-property modeline-modified-extent 'help-echo
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458 "button2 toggles the buffer's read-only status")
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459
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460 (defconst modeline-modified (purecopy '("--%1*%1+-"))
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461 "Modeline control for displaying whether current buffer is modified.")
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462 (make-variable-buffer-local 'modeline-modified)
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463
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464 (defvar modeline-narrowed-map (make-sparse-keymap 'modeline-narrowed-map)
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465 "Keymap consulted for mouse-clicks on the modeline-narrowed string.")
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466 (define-key modeline-narrowed-map 'button2
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467 (make-modeline-command-wrapper 'widen))
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468
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469 (defvar modeline-narrowed-extent (make-extent nil nil)
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470 "Extent covering the modeline-narrowed string.")
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471 (set-extent-face modeline-narrowed-extent 'modeline-mousable)
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472 (set-extent-keymap modeline-narrowed-extent modeline-narrowed-map)
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473 (set-extent-property modeline-narrowed-extent 'help-echo
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474 "button2 widens the buffer")
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475
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70
|
476 (setq-default
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477 modeline-format
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478 (list
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479 (purecopy "")
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480 (cons modeline-modified-extent 'modeline-modified)
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481 (cons modeline-buffer-id-extent 'modeline-buffer-identification)
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482 (purecopy " ")
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483 'global-mode-string
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484 (purecopy " %[(")
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485 (cons modeline-minor-mode-extent (list "" 'mode-name 'minor-mode-alist))
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486 (cons modeline-narrowed-extent "%n")
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487 'modeline-process
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488 (purecopy ")%]----")
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489 (purecopy '(line-number-mode "L%l--"))
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|
490 (purecopy '(column-number-mode "C%c--"))
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|
491 (purecopy '(-3 . "%p"))
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492 (purecopy "-%-")))
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