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428
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1 ;;; window-xemacs.el --- XEmacs window commands aside from those written in C.
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2
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3 ;; Copyright (C) 1985, 1989, 1993-94, 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: frames, 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 synched.
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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 ;; slb - 5/29/97
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33 ;; Split apart from window.el in order to keep that file better in synch
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34 ;; with Emacs.
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35
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36 ;;; Code:
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37
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38 (defgroup windows nil
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39 "Windows within a frame."
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40 :group 'environment)
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41
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42 (defun recenter (&optional n window)
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43 "Center point in WINDOW and redisplay frame. With N, put point on line N.
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44 The desired position of point is always relative to the window.
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45 Just C-u as prefix means put point in the center of the window.
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46 No N (i.e., it is nil) erases the entire frame and then
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47 redraws with point in the center of the window.
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48 If WINDOW is nil, the selected window is used."
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49 (interactive "_P")
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50 (center-to-window-line (if (consp n) nil n) window)
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51 (when (null n)
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52 (redraw-frame (window-frame window) t)))
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53
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444
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54 (defun backward-other-window (count &optional which-frames which-devices)
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55 "Select the COUNT'th different window on this frame, going backwards.
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56 This is just like calling `other-window' with COUNT negated."
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428
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57 (interactive "p")
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444
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58 (other-window (- count) which-frames which-devices))
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428
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59
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60 (defalias 'windows-of-buffer 'get-buffer-window-list)
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61
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62 (defun buffer-in-multiple-windows-p (&optional buffer)
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63 "Return t if BUFFER is in multiple windows.
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64 If BUFFER is not specified, the current buffer will be used."
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65 (setq buffer (or buffer
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66 (get-buffer buffer)
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67 (get-file-buffer buffer)
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68 (current-buffer)))
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69 (> (length (windows-of-buffer buffer)) 1))
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70
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71 (defun window-list (&optional frame minibuf window)
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72 "Return a list of windows on FRAME, beginning with WINDOW.
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73 FRAME and WINDOW default to the selected ones.
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74 Optional second arg MINIBUF t means count the minibuffer window
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75 even if not active. If MINIBUF is neither t nor nil it means
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76 not to count the minibuffer even if it is active."
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1261
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77 (setq frame (or frame (selected-frame))
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78 window (or window (selected-window frame)))
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428
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79 (if (not (eq (window-frame window) frame))
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80 (error "Window must be on frame."))
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81 (let ((current-frame (selected-frame))
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82 list)
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83 (unwind-protect
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84 (save-window-excursion
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85 (select-frame frame)
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86 (walk-windows
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87 (function (lambda (cur-window)
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88 (if (not (eq window cur-window))
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89 (setq list (cons cur-window list)))))
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90 minibuf)
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91 (setq list (cons window list)))
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92 (select-frame current-frame))))
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93
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94 ;; We used to have set-window-dedicated-p as an obsolete version
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95 ;; of set-window-buffer-dedicated, but it really makes more sense
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96 ;; this way.
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97
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98 (make-obsolete 'set-window-buffer-dedicated 'set-window-dedicated-p)
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99 (defun set-window-buffer-dedicated (window buffer)
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100 "Make WINDOW display BUFFER and be dedicated to that buffer.
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101 Then Emacs will not automatically change which buffer appears in WINDOW.
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102 If BUFFER is nil, make WINDOW not be dedicated (but don't change which
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103 buffer appears in it currently)."
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104 (if (bufferp buffer)
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105 (set-window-buffer window (get-buffer-create buffer)))
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106 (set-window-dedicated-p window (not (null buffer))))
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1149
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107
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108 ;; Window configurations
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428
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109
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1149
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110 (defstruct saved-window
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111 currentp minibufferp minibuffer-scrollp
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112 buffer mark-marker
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113 start-marker
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114 point-marker
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115 pixel-left pixel-top pixel-right pixel-bottom
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116 hscroll modeline-hscroll
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117 dedicatedp
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118 first-hchild first-vchild next-child)
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119
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120 (defstruct window-configuration
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121 frame
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122 frame-pixel-width frame-pixel-height
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123 current-buffer
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124 minibuffer-pixel-height
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125 min-width min-height
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126 saved-root-window)
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127
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128 (defun window-configuration-equal (conf-1 conf-2)
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129 "Returns a boolean indicating whether the two given configurations
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130 are identical."
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131 (or (eq conf-1 conf-2)
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132 (and (eq (window-configuration-frame conf-1)
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133 (window-configuration-frame conf-2))
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134 (= (window-configuration-frame-pixel-width conf-1)
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135 (window-configuration-frame-pixel-width conf-2))
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136 (= (window-configuration-frame-pixel-height conf-1)
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137 (window-configuration-frame-pixel-height conf-2))
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138 (eq (window-configuration-current-buffer conf-1)
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139 (window-configuration-current-buffer conf-2))
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140 (saved-window-equal (window-configuration-saved-root-window conf-1)
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141 (window-configuration-saved-root-window conf-2)))))
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142
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143 (defun saved-window-equal (saved-1 saved-2)
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144 "Returns a boolean indicating whether the two given saved windows
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145 are identical."
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146 (or (eq saved-1 saved-2)
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147 (and (eq (saved-window-currentp saved-1)
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148 (saved-window-currentp saved-2))
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149 (eq (saved-window-minibuffer-scrollp saved-1)
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150 (saved-window-minibuffer-scrollp saved-2))
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151 (eq (saved-window-buffer saved-1)
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152 (saved-window-buffer saved-2))
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153 (equal (saved-window-mark-marker saved-1)
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154 (saved-window-mark-marker saved-2))
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155 (or (and (saved-window-currentp saved-1)
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156 (saved-window-currentp saved-2))
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157 (equal (saved-window-start-marker saved-1)
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158 (saved-window-start-marker saved-2)))
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159 (or (and (saved-window-currentp saved-1)
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160 (saved-window-currentp saved-2))
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161 (equal (saved-window-point-marker saved-1)
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162 (saved-window-point-marker saved-2)))
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163 (= (saved-window-pixel-left saved-1)
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164 (saved-window-pixel-left saved-2))
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165 (= (saved-window-pixel-top saved-1)
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166 (saved-window-pixel-top saved-2))
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167 (= (saved-window-pixel-right saved-1)
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168 (saved-window-pixel-right saved-2))
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169 (= (saved-window-pixel-bottom saved-1)
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170 (saved-window-pixel-bottom saved-2))
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171 (= (saved-window-hscroll saved-1)
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172 (saved-window-hscroll saved-2))
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173 (= (saved-window-modeline-hscroll saved-1)
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174 (saved-window-modeline-hscroll saved-2))
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175 (eq (saved-window-dedicatedp saved-1)
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176 (saved-window-dedicatedp saved-2))
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177 (maybe-saved-window-equal (saved-window-first-hchild saved-1)
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178 (saved-window-first-hchild saved-2))
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179 (maybe-saved-window-equal (saved-window-first-vchild saved-1)
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180 (saved-window-first-vchild saved-2))
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181 (maybe-saved-window-equal (saved-window-next-child saved-1)
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182 (saved-window-next-child saved-2)))))
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183
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184 (defun maybe-saved-window-equal (maybe-saved-1 maybe-saved-2)
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185 "Returns a boolean indicating whether the two given saved windows
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186 or NILs are identical."
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187 (cond
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188 ((and (not maybe-saved-1) (not maybe-saved-2)) t)
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189 ((not maybe-saved-1) (not maybe-saved-2))
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190 ((not maybe-saved-2) (not maybe-saved-1))
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191 (t (saved-window-equal maybe-saved-1 maybe-saved-2))))
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192
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193 (defun current-window-configuration (&optional frame)
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194 "Return an object representing the current window configuration of FRAME.
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195 If FRAME is nil or omitted, use the selected frame.
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196 This describes the number of windows, their sizes and current buffers,
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197 and for each window on FRAME the displayed buffer, where display
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198 starts, and the positions of point and mark.
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199 An exception is made for point in the current buffer:
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200 its value is -not- saved."
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201 (let ((frame (or frame (selected-frame))))
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202 ;; The original C code used complicated but still incomplete logic
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203 ;; to decide if and how to restore the size of the minibuffer. It
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204 ;; goes something like this:
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205 ; (let ((real-font-height
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206 ; (font-height (face-font 'default) frame))
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207 ; (minibuffer-height
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208 ; (if (and (minibuffer-window frame)
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209 ; (not (frame-minibuffer-only-p frame)))
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210 ; (window-pixel-height (minibuffer-window frame))
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211 ; 0)))
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212 ; ...)
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213
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214 (make-window-configuration
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215 :frame frame
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216 :frame-pixel-width (frame-pixel-width frame)
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217 :frame-pixel-height (frame-pixel-height frame)
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218 :current-buffer (current-buffer)
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219 :min-width window-min-width :min-height window-min-height
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220 :minibuffer-pixel-height (window-pixel-height (minibuffer-window frame))
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221 ;; this tries to do what the old code did:
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222 ; :minibuffer-height (if (zerop (% minibuffer-height real-font-height))
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223 ; (- (/ minibuffer-height real-font-height)) ; lines
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224 ; minibuffer-height) ; pixels
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225 :saved-root-window (root-window->saved-window (frame-root-window frame)))))
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226
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227 (defun root-window->saved-window (window)
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228 "Converts a root window into a tree of saved-window structures."
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229 (let ((buffer (window-buffer window))
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230 (edges (window-pixel-edges window)))
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231 (let ((left (nth 0 edges))
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232 (top (nth 1 edges))
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233 (right (nth 2 edges))
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234 (bottom (nth 3 edges)))
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235 (let ((saved-window
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236 (make-saved-window
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237 :currentp (eq window (selected-window (window-frame window)))
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238 :minibufferp (eq window (minibuffer-window (window-frame window)))
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239 :minibuffer-scrollp (eq window minibuffer-scroll-window)
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240 :buffer buffer
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241 :pixel-left left :pixel-top top :pixel-right right :pixel-bottom bottom
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242 :hscroll (window-hscroll window)
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243 :modeline-hscroll (modeline-hscroll window)
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244 :dedicatedp (window-dedicated-p window)
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245 :first-hchild (if (window-first-hchild window)
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246 (root-window->saved-window (window-first-hchild window))
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247 nil)
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248 :first-vchild (if (window-first-vchild window)
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249 (root-window->saved-window (window-first-vchild window))
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250 nil)
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251 :next-child (if (window-next-child window)
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252 (root-window->saved-window (window-next-child window))
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253 nil))))
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254 (if buffer
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255 (progn
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256 (let ((marker (make-marker)))
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257 (set-marker marker (window-start window) buffer)
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258 (setf (saved-window-start-marker saved-window) marker))
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259 (let ((marker (make-marker)))
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260 (if (eq window (selected-window))
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261 (set-marker marker (point buffer) buffer)
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262 (set-marker marker (window-point window) buffer))
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263 (setf (saved-window-point-marker saved-window) marker))
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264 (setf (saved-window-mark-marker saved-window)
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265 (copy-marker (mark-marker t buffer)))))
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266 saved-window))))
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267
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268 (defun set-window-configuration (configuration)
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269 "Set the configuration of windows and buffers as specified by CONFIGURATION.
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270 CONFIGURATION must be a value previously returned
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271 by `current-window-configuration'."
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272 (let ((frame (window-configuration-frame configuration)))
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273 (if (and (frame-live-p frame)
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274 (not (window-configuration-equal configuration
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275 (current-window-configuration))))
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276 (really-set-window-configuration frame configuration))))
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277
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278 (defun really-set-window-configuration (frame configuration)
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279 "Set the window configuration CONFIGURATION on live frame FRAME."
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280 ;; avoid potential temporary problems
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281 (setq window-min-width 0)
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282 (setq window-min-height 0)
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283 (setq minibuffer-scroll-window nil)
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284
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285 (frame-reduce-to-one-window frame)
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286 (set-window-configuration-frame-size configuration)
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287
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288 ;; these may have changed because of the delete
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289 (let ((root-window (frame-root-window frame)))
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290 (enlarge-window-pixels
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291 (- (window-configuration-minibuffer-pixel-height configuration)
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292 (window-pixel-height (minibuffer-window frame)))
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293 nil
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294 (minibuffer-window frame))
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295
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296 ;; avoid that `set-window-point' will set the buffer's point for
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297 ;; the selected window
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298 (select-window (minibuffer-window frame))
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299
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300 (let ((window-configuration-current-window nil))
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1261
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301 (declare (special window-configuration-current-window))
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1149
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302 (restore-saved-window configuration
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303 root-window
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304 (window-configuration-saved-root-window configuration)
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305 'vertical)
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306 (if window-configuration-current-window
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307 (select-window window-configuration-current-window))))
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308
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309 (setq window-min-width (window-configuration-min-width configuration))
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310 (setq window-min-height (window-configuration-min-height configuration))
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311
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312 (set-buffer (window-configuration-current-buffer configuration)))
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313
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314 (defun set-window-configuration-frame-size (configuration)
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315 "Restore the frame size of a window configuration."
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316 (set-frame-pixel-size
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317 (window-configuration-frame configuration)
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318 (window-configuration-frame-pixel-width configuration)
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319 (window-configuration-frame-pixel-height configuration)))
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320
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321 (defun frame-reduce-to-one-window (frame)
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322 "Delete all windows except the minibuffer and one other in FRAME."
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323 (let* ((root-window (frame-root-window frame))
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324 (combination-start (or (window-first-hchild root-window)
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325 (window-first-vchild root-window))))
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326 (if combination-start
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327 (window-reduce-to-one combination-start))))
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328
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1230
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329 ;; Note that simply using `delete-other-windows' causes obscure
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330 ;; breakage. --Mike
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331
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1149
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332 (defun window-reduce-to-one (window)
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333 "Make sure only one subwindow of WINDOW is left."
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1230
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334 (let ((window (window-next-child window)))
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335 (while window
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336 (if (window-live-p window)
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337 (let ((next (window-next-child window)))
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338 (delete-window window)
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339 (setq window next)))))
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340 (cond
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341 ((window-first-hchild window)
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342 (window-reduce-to-one (window-first-hchild window)))
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343 ((window-first-vchild window)
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344 (window-reduce-to-one (window-first-vchild window)))))
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1149
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345
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346 (defun restore-saved-window (configuration window saved-window direction)
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347 "Within CONFIGURATION, restore WINDOW to the state of SAVED-WINDOW."
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348 (if (saved-window-next-child saved-window)
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349 (progn
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350 (if (not (saved-window-minibufferp (saved-window-next-child saved-window)))
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351 (progn
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352 (cond ((eq direction 'vertical)
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353 (split-window window nil nil))
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354 ((eq direction 'horizontal)
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355 (split-window window nil t)))
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356 (restore-saved-window configuration
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357 (window-next-child window)
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358 (saved-window-next-child saved-window)
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359 direction)))
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360
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361 (if (saved-window-first-hchild saved-window)
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362 (restore-saved-window configuration
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363 window
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364 (saved-window-first-hchild saved-window)
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365 'horizontal))
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366 (if (saved-window-first-vchild saved-window)
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367 (restore-saved-window configuration
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368 window
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369 (saved-window-first-vchild saved-window)
|
|
|
370 'vertical))))
|
|
|
371
|
|
|
372 (if (not (saved-window-minibufferp saved-window))
|
|
|
373 (restore-saved-window-parameters configuration window saved-window)))
|
|
|
374
|
|
|
375 (defun restore-saved-window-parameters (configuration window saved-window)
|
|
|
376 "Restore the window parameters stored in SAVED-WINDOW on WINDOW."
|
|
1261
|
377 (declare (special window-configuration-current-window))
|
|
1149
|
378 (let ((buffer (saved-window-buffer saved-window)))
|
|
|
379 (if (and buffer (buffer-live-p buffer))
|
|
|
380 (progn
|
|
|
381 (set-window-buffer window
|
|
|
382 (saved-window-buffer saved-window))
|
|
|
383 (set-window-start window
|
|
1161
|
384 (marker-position (saved-window-start-marker saved-window))
|
|
|
385 t)
|
|
1149
|
386 (set-window-point window
|
|
|
387 (marker-position (saved-window-point-marker saved-window)))
|
|
|
388 (set-marker (mark-marker t buffer)
|
|
|
389 (marker-position (saved-window-mark-marker saved-window))
|
|
|
390 buffer)
|
|
|
391 (if (not (eq buffer (window-configuration-current-buffer configuration)))
|
|
|
392 (goto-char (window-point window) buffer)))))
|
|
|
393
|
|
|
394 (if (and (not (saved-window-first-hchild saved-window))
|
|
|
395 (not (saved-window-first-vchild saved-window)))
|
|
|
396 ;; only set size for non-container windows
|
|
|
397 (progn
|
|
|
398 ;; If this is the root window, it may be the only window.
|
|
|
399 ;; Because of mismatches between actual and reported frame
|
|
|
400 ;; size, it may not let us actually set the size of the root
|
|
|
401 ;; window to what we want. --Mike
|
|
|
402 (if (not (eq window (frame-root-window (window-frame window))))
|
|
|
403 (progn
|
|
|
404 (enlarge-window-pixels (- (saved-window-pixel-width saved-window)
|
|
|
405 (window-pixel-width window))
|
|
|
406 t
|
|
|
407 window)
|
|
|
408 (enlarge-window-pixels (- (saved-window-pixel-height saved-window)
|
|
|
409 (window-pixel-height window))
|
|
|
410 nil
|
|
|
411 window)))
|
|
|
412 (set-window-hscroll window (saved-window-hscroll saved-window))
|
|
|
413 (set-modeline-hscroll window
|
|
|
414 (saved-window-modeline-hscroll saved-window))
|
|
|
415 (set-window-dedicated-p window (saved-window-dedicatedp saved-window))))
|
|
|
416
|
|
|
417 (if (saved-window-currentp saved-window)
|
|
|
418 (setq window-configuration-current-window window))
|
|
|
419 (if (saved-window-minibuffer-scrollp saved-window)
|
|
|
420 (setq minibuffer-scroll-window window)))
|
|
|
421
|
|
|
422 (defun saved-window-pixel-width (saved-window)
|
|
|
423 "Compute the pixel width of SAVED-WINDOW."
|
|
|
424 (- (saved-window-pixel-right saved-window)
|
|
|
425 (saved-window-pixel-left saved-window)))
|
|
|
426
|
|
|
427 (defun saved-window-pixel-height (saved-window)
|
|
|
428 "Compute the pixel height of SAVED-WINDOW."
|
|
|
429 (- (saved-window-pixel-bottom saved-window)
|
|
|
430 (saved-window-pixel-top saved-window)))
|
|
428
|
431
|
|
|
432 ;; The window-config stack is stored as a list in frame property
|
|
|
433 ;; 'window-config-stack, with the most recent element at the front.
|
|
|
434 ;; When you pop off an element, the popped off element gets put at the
|
|
|
435 ;; front of frame property 'window-config-unpop-stack, so you can
|
|
|
436 ;; retrieve it using unpop-window-configuration.
|
|
|
437
|
|
|
438 (defcustom window-config-stack-max 16
|
|
|
439 "*Maximum size of window configuration stack.
|
|
|
440 Start discarding off end if it gets this big."
|
|
|
441 :type 'integer
|
|
|
442 :group 'windows)
|
|
|
443
|
|
|
444 (defun window-config-stack (&optional frame)
|
|
|
445 (or frame (setq frame (selected-frame)))
|
|
|
446 (let ((stack (frame-property frame 'window-config-stack)))
|
|
|
447 (if stack
|
|
|
448 (set-undoable-stack-max stack window-config-stack-max)
|
|
|
449 (progn
|
|
|
450 (setq stack (make-undoable-stack window-config-stack-max))
|
|
|
451 (set-frame-property frame 'window-config-stack stack)))
|
|
|
452 stack))
|
|
|
453
|
|
|
454 (defun push-window-configuration (&optional config)
|
|
|
455 "Push the current window configuration onto the window-config stack.
|
|
|
456 If CONFIG is specified, push it instead of the current window configuration.
|
|
|
457 Each frame has its own window-config stack."
|
|
|
458 (interactive)
|
|
|
459 (let ((wc (or config (current-window-configuration)))
|
|
|
460 (stack (window-config-stack)))
|
|
|
461 (if (or (= 0 (undoable-stack-a-length stack))
|
|
|
462 (not (equal (undoable-stack-a-top stack) wc)))
|
|
|
463 (undoable-stack-push stack wc))))
|
|
|
464
|
|
|
465 (defun pop-window-configuration ()
|
|
|
466 "Pop the top window configuration off the window-config stack and set it.
|
|
|
467 Before setting the new window configuration, the current window configuration
|
|
|
468 is pushed onto the \"unpop\" stack.
|
|
|
469 `unpop-window-configuration' undoes what this function does.
|
|
|
470 Each frame has its own window-config and \"unpop\" stack."
|
|
|
471 (interactive)
|
|
|
472 (let ((stack (window-config-stack))
|
|
|
473 (wc (current-window-configuration))
|
|
|
474 popped)
|
|
|
475 (condition-case nil
|
|
|
476 (progn
|
|
|
477 (setq popped (undoable-stack-pop stack))
|
|
|
478 (while (equal popped wc)
|
|
|
479 (setq popped (undoable-stack-pop stack)))
|
|
|
480 (undoable-stack-push stack wc)
|
|
|
481 (undoable-stack-undo stack)
|
|
|
482 (set-window-configuration popped)
|
|
|
483 popped)
|
|
|
484 (trunc-stack-bottom
|
|
|
485 (error "Bottom of window config stack")))))
|
|
|
486
|
|
|
487 (defun unpop-window-configuration ()
|
|
|
488 "Undo the effect of the most recent `pop-window-configuration'.
|
|
|
489 This does exactly the inverse of what `pop-window-configuration' does:
|
|
|
490 i.e. it pops a window configuration off of the \"unpop\" stack and
|
|
|
491 pushes the current window configuration onto the window-config stack.
|
|
|
492 Each frame has its own window-config and \"unpop\" stack."
|
|
|
493 (interactive)
|
|
|
494 (let ((stack (window-config-stack))
|
|
|
495 (wc (current-window-configuration))
|
|
|
496 popped)
|
|
|
497 (condition-case nil
|
|
|
498 (progn
|
|
|
499 (setq popped
|
|
|
500 (progn
|
|
|
501 (undoable-stack-redo stack)
|
|
|
502 (undoable-stack-pop stack)))
|
|
|
503 (while (equal popped wc)
|
|
|
504 (setq popped
|
|
|
505 (progn
|
|
|
506 (undoable-stack-redo stack)
|
|
|
507 (undoable-stack-pop stack))))
|
|
|
508 (undoable-stack-push stack wc)
|
|
|
509 (set-window-configuration popped)
|
|
|
510 popped)
|
|
|
511 (trunc-stack-bottom
|
|
|
512 (error "Top of window config stack")))))
|
|
|
513
|
|
|
514
|
|
|
515 ;;;;;;;;;;;;; display-buffer, moved here from C. Hallelujah.
|
|
|
516
|
|
442
|
517 (make-variable-buffer-local '__buffer-dedicated-frame)
|
|
|
518
|
|
|
519 (defun buffer-dedicated-frame (&optional buffer)
|
|
|
520 "Return the frame dedicated to this BUFFER, or nil if there is none.
|
|
|
521 No argument or nil as argument means use current buffer as BUFFER."
|
|
|
522 (let ((buffer (decode-buffer buffer)))
|
|
|
523 (let ((frame (symbol-value-in-buffer '__buffer-dedicated-frame buffer)))
|
|
|
524 ;; XEmacs addition: if the frame is dead, silently make it go away.
|
|
|
525 (when (and (framep frame) (not (frame-live-p frame)))
|
|
|
526 (with-current-buffer buffer
|
|
|
527 (setq __buffer-dedicated-frame nil))
|
|
|
528 (setq frame nil))
|
|
|
529 frame)))
|
|
|
530
|
|
|
531 (defun set-buffer-dedicated-frame (buffer frame)
|
|
|
532 "For this BUFFER, set the FRAME dedicated to it.
|
|
|
533 FRAME must be a frame or nil."
|
|
|
534 (let ((buffer (decode-buffer buffer)))
|
|
|
535 (and frame
|
|
|
536 (check-argument-type #'frame-live-p frame))
|
|
|
537 (with-current-buffer buffer
|
|
|
538 (setq __buffer-dedicated-frame frame))))
|
|
|
539
|
|
428
|
540 (defvar display-buffer-function nil
|
|
|
541 "If non-nil, function to call to handle `display-buffer'.
|
|
903
|
542 It will receive four args: the same as those to `display-buffer'.")
|
|
428
|
543
|
|
|
544 (defvar pre-display-buffer-function nil
|
|
|
545 "If non-nil, function that will be called from `display-buffer'
|
|
903
|
546 as the first action. It will receive four args: the same as those
|
|
428
|
547 to `display-buffer'.
|
|
|
548 This function may be used to select an appropriate frame for the buffer,
|
|
|
549 for example. See also the variable `display-buffer-function', which may
|
|
|
550 be used to completely replace the `display-buffer' function.
|
|
|
551 If the return value of this function is non-nil, it should be a frame,
|
|
|
552 and that frame will be used to display the buffer.")
|
|
|
553
|
|
|
554 (defcustom pop-up-frames nil
|
|
|
555 "*Non-nil means `display-buffer' should make a separate frame."
|
|
|
556 :type 'boolean
|
|
|
557 :group 'frames)
|
|
|
558
|
|
|
559 (defvar pop-up-frame-function nil
|
|
|
560 "Function to call to handle automatic new frame creation.
|
|
|
561 It is called with no arguments and should return a newly created frame.
|
|
|
562
|
|
|
563 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
|
|
|
564 where `pop-up-frame-alist' would hold the default frame parameters.")
|
|
|
565
|
|
|
566 (defcustom special-display-buffer-names nil
|
|
|
567 "*List of buffer names that should have their own special frames.
|
|
|
568 Displaying a buffer whose name is in this list makes a special frame for it
|
|
|
569 using `special-display-function'.
|
|
|
570
|
|
|
571 An element of the list can be a cons cell instead of just a string.
|
|
|
572 Then the car should be a buffer name, and the cdr specifies frame
|
|
|
573 parameters for creating the frame for that buffer.
|
|
|
574 More precisely, the cdr is passed as the second argument to
|
|
|
575 the function found in `special-display-function', when making that frame.
|
|
|
576 See also `special-display-regexps'."
|
|
|
577 :type '(repeat (choice :value ""
|
|
|
578 (string :tag "Name")
|
|
|
579 (cons :menu-tag "Properties"
|
|
|
580 :value ("" . nil)
|
|
|
581 (string :tag "Name")
|
|
|
582 (repeat :tag "Properties"
|
|
|
583 (group :inline t
|
|
|
584 (symbol :tag "Property")
|
|
|
585 (sexp :tag "Value"))))))
|
|
|
586 :group 'frames)
|
|
|
587
|
|
|
588 (defcustom special-display-regexps nil
|
|
|
589 "*List of regexps saying which buffers should have their own special frames.
|
|
|
590 If a buffer name matches one of these regexps, it gets its own frame.
|
|
|
591 Displaying a buffer whose name is in this list makes a special frame for it
|
|
|
592 using `special-display-function'.
|
|
|
593
|
|
|
594 An element of the list can be a cons cell instead of just a string.
|
|
|
595 Then the car should be the regexp, and the cdr specifies frame
|
|
|
596 parameters for creating the frame for buffers that match.
|
|
|
597 More precisely, the cdr is passed as the second argument to
|
|
|
598 the function found in `special-display-function', when making that frame.
|
|
|
599 See also `special-display-buffer-names'."
|
|
|
600 :type '(repeat (choice :value ""
|
|
|
601 regexp
|
|
|
602 (cons :menu-tag "Properties"
|
|
|
603 :value ("" . nil)
|
|
|
604 regexp
|
|
|
605 (repeat :tag "Properties"
|
|
|
606 (group :inline t
|
|
|
607 (symbol :tag "Property")
|
|
|
608 (sexp :tag "Value"))))))
|
|
|
609 :group 'frames)
|
|
|
610
|
|
|
611 (defvar special-display-function nil
|
|
|
612 "Function to call to make a new frame for a special buffer.
|
|
|
613 It is called with two arguments, the buffer and optional buffer specific
|
|
|
614 data, and should return a window displaying that buffer.
|
|
|
615 The default value makes a separate frame for the buffer,
|
|
|
616 using `special-display-frame-alist' to specify the frame parameters.
|
|
|
617
|
|
|
618 A buffer is special if its is listed in `special-display-buffer-names'
|
|
|
619 or matches a regexp in `special-display-regexps'.")
|
|
|
620
|
|
|
621 (defcustom same-window-buffer-names nil
|
|
|
622 "*List of buffer names that should appear in the selected window.
|
|
|
623 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
|
|
|
624 switches to it in the selected window, rather than making it appear
|
|
|
625 in some other window.
|
|
|
626
|
|
|
627 An element of the list can be a cons cell instead of just a string.
|
|
|
628 Then the car must be a string, which specifies the buffer name.
|
|
|
629 This is for compatibility with `special-display-buffer-names';
|
|
|
630 the cdr of the cons cell is ignored.
|
|
|
631
|
|
|
632 See also `same-window-regexps'."
|
|
|
633 :type '(repeat (string :tag "Name"))
|
|
|
634 :group 'windows)
|
|
|
635
|
|
|
636 (defcustom same-window-regexps nil
|
|
|
637 "*List of regexps saying which buffers should appear in the selected window.
|
|
|
638 If a buffer name matches one of these regexps, then displaying it
|
|
|
639 using `display-buffer' or `pop-to-buffer' switches to it
|
|
|
640 in the selected window, rather than making it appear in some other window.
|
|
|
641
|
|
|
642 An element of the list can be a cons cell instead of just a string.
|
|
|
643 Then the car must be a string, which specifies the buffer name.
|
|
|
644 This is for compatibility with `special-display-buffer-names';
|
|
|
645 the cdr of the cons cell is ignored.
|
|
|
646
|
|
|
647 See also `same-window-buffer-names'."
|
|
|
648 :type '(repeat regexp)
|
|
|
649 :group 'windows)
|
|
|
650
|
|
|
651 (defcustom pop-up-windows t
|
|
|
652 "*Non-nil means display-buffer should make new windows."
|
|
|
653 :type 'boolean
|
|
|
654 :group 'windows)
|
|
|
655
|
|
|
656 (defcustom split-height-threshold 500
|
|
|
657 "*display-buffer would prefer to split the largest window if this large.
|
|
|
658 If there is only one window, it is split regardless of this value."
|
|
|
659 :type 'integer
|
|
|
660 :group 'windows)
|
|
|
661
|
|
|
662 (defcustom split-width-threshold 500
|
|
|
663 "*display-buffer would prefer to split the largest window if this large.
|
|
|
664 If there is only one window, it is split regardless of this value."
|
|
|
665 :type 'integer
|
|
|
666 :group 'windows)
|
|
|
667
|
|
|
668 ;; Deiconify the frame containing the window WINDOW, then return WINDOW.
|
|
|
669
|
|
|
670 (defun display-buffer-1 (window)
|
|
|
671 (if (frame-iconified-p (window-frame window))
|
|
|
672 (make-frame-visible (window-frame window)))
|
|
|
673 window)
|
|
|
674
|
|
|
675 ;; Can you believe that all of this crap was formerly in C?
|
|
|
676 ;; Praise Jesus that it's not there any more.
|
|
|
677
|
|
903
|
678 (defun display-buffer (buffer &optional not-this-window-p override-frame
|
|
|
679 shrink-to-fit)
|
|
428
|
680 "Make BUFFER appear in some window on the current frame, but don't select it.
|
|
|
681 BUFFER can be a buffer or a buffer name.
|
|
|
682 If BUFFER is shown already in some window in the current frame,
|
|
|
683 just uses that one, unless the window is the selected window and
|
|
|
684 NOT-THIS-WINDOW-P is non-nil (interactively, with prefix arg).
|
|
|
685
|
|
|
686 If BUFFER has a dedicated frame, display on that frame instead of
|
|
|
687 the current frame, unless OVERRIDE-FRAME is non-nil.
|
|
|
688
|
|
|
689 If OVERRIDE-FRAME is non-nil, display on that frame instead of
|
|
|
690 the current frame (or the dedicated frame).
|
|
|
691
|
|
903
|
692 If SHRINK-TO-FIT is non-nil and splitting the window is appropriate, give
|
|
|
693 the new buffer less than half the space if it is small enough to fit.
|
|
|
694
|
|
428
|
695 If `pop-up-windows' is non-nil, always use the
|
|
|
696 current frame and create a new window regardless of whether the
|
|
|
697 buffer has a dedicated frame, and regardless of whether
|
|
|
698 OVERRIDE-FRAME was specified.
|
|
|
699
|
|
|
700 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
|
|
|
701
|
|
|
702 Returns the window displaying BUFFER."
|
|
|
703 (interactive "BDisplay buffer:\nP")
|
|
|
704
|
|
|
705 (let ((wconfig (current-window-configuration))
|
|
|
706 (result
|
|
|
707 ;; We just simulate a `return' in C. This function is way ugly
|
|
|
708 ;; and does `returns' all over the place and there's no sense
|
|
|
709 ;; in trying to rewrite it to be more Lispy.
|
|
|
710 (catch 'done
|
|
|
711 (let (window old-frame target-frame explicit-frame)
|
|
|
712 (setq old-frame (or (last-nonminibuf-frame) (selected-frame)))
|
|
|
713 (setq buffer (get-buffer buffer))
|
|
|
714 (check-argument-type 'bufferp buffer)
|
|
|
715
|
|
|
716 (setq explicit-frame
|
|
|
717 (if pre-display-buffer-function
|
|
|
718 (funcall pre-display-buffer-function buffer
|
|
|
719 not-this-window-p
|
|
903
|
720 override-frame
|
|
|
721 shrink-to-fit)))
|
|
428
|
722
|
|
|
723 ;; Give the user the ability to completely reimplement
|
|
|
724 ;; this function via the `display-buffer-function'.
|
|
|
725 (if display-buffer-function
|
|
|
726 (throw 'done
|
|
|
727 (funcall display-buffer-function buffer
|
|
|
728 not-this-window-p
|
|
903
|
729 override-frame
|
|
|
730 shrink-to-fit)))
|
|
428
|
731
|
|
|
732 ;; If the buffer has a dedicated frame, that takes
|
|
|
733 ;; precedence over the current frame, and over what the
|
|
|
734 ;; pre-display-buffer-function did.
|
|
|
735 (let ((dedi (buffer-dedicated-frame buffer)))
|
|
|
736 (if (frame-live-p dedi) (setq explicit-frame dedi)))
|
|
|
737
|
|
|
738 ;; if override-frame is supplied, that takes precedence over
|
|
|
739 ;; everything. This is gonna look bad if the
|
|
|
740 ;; pre-display-buffer-function raised some other frame
|
|
|
741 ;; already.
|
|
|
742 (if override-frame
|
|
|
743 (progn
|
|
|
744 (check-argument-type 'frame-live-p override-frame)
|
|
|
745 (setq explicit-frame override-frame)))
|
|
|
746
|
|
|
747 (setq target-frame
|
|
|
748 (or explicit-frame
|
|
|
749 (last-nonminibuf-frame)
|
|
|
750 (selected-frame)))
|
|
|
751
|
|
|
752 ;; If we have switched frames, then set not-this-window-p
|
|
|
753 ;; to false. Switching frames means that selected-window
|
|
|
754 ;; is no longer the same as it was on entry -- it's the
|
|
|
755 ;; selected-window of target_frame instead of old_frame,
|
|
|
756 ;; so it's a fine candidate for display.
|
|
|
757 (if (not (eq old-frame target-frame))
|
|
|
758 (setq not-this-window-p nil))
|
|
|
759
|
|
|
760 ;; if it's in the selected window, and that's ok, then we're done.
|
|
|
761 (if (and (not not-this-window-p)
|
|
|
762 (eq buffer (window-buffer (selected-window))))
|
|
|
763 (throw 'done (display-buffer-1 (selected-window))))
|
|
|
764
|
|
|
765 ;; See if the user has specified this buffer should appear
|
|
|
766 ;; in the selected window.
|
|
|
767
|
|
|
768 (if not-this-window-p
|
|
|
769 nil
|
|
|
770
|
|
|
771 (if (or (member (buffer-name buffer) same-window-buffer-names)
|
|
|
772 (assoc (buffer-name buffer) same-window-buffer-names))
|
|
|
773 (progn
|
|
|
774 (switch-to-buffer buffer)
|
|
|
775 (throw 'done (display-buffer-1 (selected-window)))))
|
|
|
776
|
|
|
777 (let ((tem same-window-regexps))
|
|
|
778 (while tem
|
|
|
779 (let ((car (car tem)))
|
|
|
780 (if (or
|
|
|
781 (and (stringp car)
|
|
|
782 (string-match car (buffer-name buffer)))
|
|
|
783 (and (consp car) (stringp (car car))
|
|
|
784 (string-match (car car) (buffer-name buffer))))
|
|
|
785 (progn
|
|
|
786 (switch-to-buffer buffer)
|
|
|
787 (throw 'done (display-buffer-1
|
|
|
788 (selected-window))))))
|
|
|
789 (setq tem (cdr tem)))))
|
|
|
790
|
|
|
791 ;; If pop-up-frames, look for a window showing BUFFER on
|
|
|
792 ;; any visible or iconified frame. Otherwise search only
|
|
|
793 ;; the current frame.
|
|
|
794 (if (and (not explicit-frame)
|
|
|
795 (or pop-up-frames (not (last-nonminibuf-frame))))
|
|
|
796 (setq target-frame 0))
|
|
|
797
|
|
|
798 ;; Otherwise, find some window that it's already in, and
|
|
|
799 ;; return that, unless that window is the selected window
|
|
|
800 ;; and that isn't ok. What a contorted mess!
|
|
|
801 (setq window (or (if (not explicit-frame)
|
|
|
802 ;; search the selected frame
|
|
|
803 ;; first if the user didn't
|
|
|
804 ;; specify an explicit frame.
|
|
|
805 (get-buffer-window buffer nil))
|
|
|
806 (get-buffer-window buffer target-frame)))
|
|
|
807 (if (and window
|
|
|
808 (or (not not-this-window-p)
|
|
|
809 (not (eq window (selected-window)))))
|
|
|
810 (throw 'done (display-buffer-1 window)))
|
|
|
811
|
|
|
812 ;; Certain buffer names get special handling.
|
|
|
813 (if special-display-function
|
|
|
814 (progn
|
|
|
815 (if (member (buffer-name buffer)
|
|
|
816 special-display-buffer-names)
|
|
|
817 (throw 'done (funcall special-display-function buffer)))
|
|
|
818
|
|
|
819 (let ((tem (assoc (buffer-name buffer)
|
|
|
820 special-display-buffer-names)))
|
|
|
821 (if tem
|
|
|
822 (throw 'done (funcall special-display-function
|
|
|
823 buffer (cdr tem)))))
|
|
|
824
|
|
|
825 (let ((tem special-display-regexps))
|
|
|
826 (while tem
|
|
|
827 (let ((car (car tem)))
|
|
|
828 (if (and (stringp car)
|
|
|
829 (string-match car (buffer-name buffer)))
|
|
|
830 (throw 'done
|
|
|
831 (funcall special-display-function buffer)))
|
|
|
832 (if (and (consp car)
|
|
|
833 (stringp (car car))
|
|
|
834 (string-match (car car)
|
|
|
835 (buffer-name buffer)))
|
|
|
836 (throw 'done (funcall
|
|
|
837 special-display-function buffer
|
|
|
838 (cdr car)))))
|
|
|
839 (setq tem (cdr tem))))))
|
|
|
840
|
|
|
841 ;; If there are no frames open that have more than a minibuffer,
|
|
|
842 ;; we need to create a new frame.
|
|
|
843 (if (or pop-up-frames
|
|
|
844 (null (last-nonminibuf-frame)))
|
|
|
845 (progn
|
|
|
846 (setq window (frame-selected-window
|
|
|
847 (funcall pop-up-frame-function)))
|
|
|
848 (set-window-buffer window buffer)
|
|
|
849 (throw 'done (display-buffer-1 window))))
|
|
|
850
|
|
|
851 ;; Otherwise, make it be in some window, splitting if
|
|
|
852 ;; appropriate/possible. Do not split a window if we are
|
|
|
853 ;; displaying the buffer in a different frame than that which
|
|
|
854 ;; was current when we were called. (It is already in a
|
|
|
855 ;; different window by virtue of being in another frame.)
|
|
|
856 (if (or (and pop-up-windows (eq target-frame old-frame))
|
|
|
857 (eq 'only (frame-property (selected-frame) 'minibuffer))
|
|
|
858 ;; If the current frame is a special display frame,
|
|
|
859 ;; don't try to reuse its windows.
|
|
|
860 (window-dedicated-p (frame-root-window (selected-frame))))
|
|
|
861 (progn
|
|
|
862 (if (eq 'only (frame-property (selected-frame) 'minibuffer))
|
|
|
863 (setq target-frame (last-nonminibuf-frame)))
|
|
|
864
|
|
|
865 ;; Don't try to create a window if would get an error with
|
|
|
866 ;; height.
|
|
|
867 (if (< split-height-threshold (* 2 window-min-height))
|
|
|
868 (setq split-height-threshold (* 2 window-min-height)))
|
|
|
869
|
|
|
870 ;; Same with width.
|
|
|
871 (if (< split-width-threshold (* 2 window-min-width))
|
|
|
872 (setq split-width-threshold (* 2 window-min-width)))
|
|
|
873
|
|
|
874 ;; If the frame we would try to split cannot be split,
|
|
|
875 ;; try other frames.
|
|
|
876 (if (frame-property (if (null target-frame)
|
|
|
877 (selected-frame)
|
|
|
878 (last-nonminibuf-frame))
|
|
|
879 'unsplittable)
|
|
|
880 (setq window
|
|
|
881 ;; Try visible frames first.
|
|
|
882 (or (get-largest-window 'visible)
|
|
|
883 ;; If that didn't work, try iconified frames.
|
|
|
884 (get-largest-window 0)
|
|
|
885 (get-largest-window t)))
|
|
|
886 (setq window (get-largest-window target-frame)))
|
|
|
887
|
|
|
888 ;; If we got a tall enough full-width window that
|
|
|
889 ;; can be split, split it.
|
|
|
890 (if (and window
|
|
|
891 (not (frame-property (window-frame window)
|
|
|
892 'unsplittable))
|
|
|
893 (>= (window-height window) split-height-threshold)
|
|
|
894 (or (>= (window-width window)
|
|
|
895 split-width-threshold)
|
|
|
896 (and (window-leftmost-p window)
|
|
|
897 (window-rightmost-p window))))
|
|
|
898 (setq window (split-window window))
|
|
|
899 (let (upper
|
|
|
900 ;; lower
|
|
|
901 other)
|
|
|
902 (setq window (get-lru-window target-frame))
|
|
|
903 ;; If the LRU window is selected, and big enough,
|
|
|
904 ;; and can be split, split it.
|
|
|
905 (if (and window
|
|
|
906 (not (frame-property (window-frame window)
|
|
|
907 'unsplittable))
|
|
|
908 (or (eq window (selected-window))
|
|
|
909 (not (window-parent window)))
|
|
|
910 (>= (window-height window)
|
|
|
911 (* 2 window-min-height)))
|
|
|
912 (setq window (split-window window)))
|
|
|
913 ;; If get-lru-window returned nil, try other approaches.
|
|
|
914 ;; Try visible frames first.
|
|
|
915 (or window
|
|
|
916 (setq window (or (get-largest-window 'visible)
|
|
|
917 ;; If that didn't work, try
|
|
|
918 ;; iconified frames.
|
|
|
919 (get-largest-window 0)
|
|
|
920 ;; Try invisible frames.
|
|
|
921 (get-largest-window t)
|
|
|
922 ;; As a last resort, make
|
|
|
923 ;; a new frame.
|
|
|
924 (frame-selected-window
|
|
|
925 (funcall
|
|
|
926 pop-up-frame-function)))))
|
|
|
927 ;; If window appears above or below another,
|
|
|
928 ;; even out their heights.
|
|
|
929 (if (window-previous-child window)
|
|
|
930 (setq other (window-previous-child window)
|
|
|
931 ;; lower window
|
|
|
932 upper other))
|
|
|
933 (if (window-next-child window)
|
|
|
934 (setq other (window-next-child window)
|
|
|
935 ;; lower other
|
|
|
936 upper window))
|
|
|
937 ;; Check that OTHER and WINDOW are vertically arrayed.
|
|
|
938 (if (and other
|
|
|
939 (not (= (nth 1 (window-pixel-edges other))
|
|
|
940 (nth 1 (window-pixel-edges window))))
|
|
|
941 (> (window-pixel-height other)
|
|
|
942 (window-pixel-height window)))
|
|
|
943 (enlarge-window (- (/ (+ (window-height other)
|
|
|
944 (window-height window))
|
|
|
945 2)
|
|
|
946 (window-height upper))
|
|
903
|
947 nil upper))
|
|
|
948 (if shrink-to-fit
|
|
|
949 (shrink-window-if-larger-than-buffer window)))))
|
|
428
|
950
|
|
|
951 (setq window (get-lru-window target-frame)))
|
|
|
952
|
|
|
953 ;; Bring the window's previous buffer to the top of the MRU chain.
|
|
|
954 (if (window-buffer window)
|
|
|
955 (save-excursion
|
|
|
956 (save-selected-window
|
|
|
957 (select-window window)
|
|
|
958 (record-buffer (window-buffer window)))))
|
|
|
959
|
|
|
960 (set-window-buffer window buffer)
|
|
|
961
|
|
|
962 (display-buffer-1 window)))))
|
|
|
963 (or (equal wconfig (current-window-configuration))
|
|
|
964 (push-window-configuration wconfig))
|
|
|
965 result))
|
|
|
966
|
|
|
967 ;;; window-xemacs.el ends here
|
