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1 ;;; gnus-win.el --- window configuration functions for Gnus
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2 ;; Copyright (C) 1996,97 Free Software Foundation, Inc.
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3
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4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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5 ;; Keywords: news
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6
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7 ;; This file is part of GNU Emacs.
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8
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9 ;; GNU Emacs is free software; you can redistribute it and/or modify
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10 ;; it under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; GNU Emacs is distributed in the hope that it will be useful,
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15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ;; GNU General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 ;; Boston, MA 02111-1307, USA.
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23
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24 ;;; Commentary:
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25
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26 ;;; Code:
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27
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28 (require 'gnus)
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29
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30 (defgroup gnus-windows nil
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31 "Window configuration."
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32 :group 'gnus)
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33
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34 (defcustom gnus-use-full-window t
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35 "*If non-nil, use the entire Emacs screen."
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36 :group 'gnus-windows
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37 :type 'boolean)
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38
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39 (defvar gnus-window-configuration nil
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40 "Obsolete variable. See `gnus-buffer-configuration'.")
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41
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42 (defcustom gnus-window-min-width 2
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43 "*Minimum width of Gnus buffers."
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44 :group 'gnus-windows
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45 :type 'integer)
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46
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47 (defcustom gnus-window-min-height 1
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48 "*Minimum height of Gnus buffers."
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49 :group 'gnus-windows
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50 :type 'integer)
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51
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52 (defcustom gnus-always-force-window-configuration nil
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53 "*If non-nil, always force the Gnus window configurations."
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54 :group 'gnus-windows
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55 :type 'boolean)
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56
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57 (defvar gnus-buffer-configuration
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58 '((group
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59 (vertical 1.0
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60 (group 1.0 point)
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61 (if gnus-carpal '(group-carpal 4))))
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62 (summary
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63 (vertical 1.0
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64 (summary 1.0 point)
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65 (if gnus-carpal '(summary-carpal 4))))
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66 (article
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67 (cond
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68 ((and gnus-use-picons
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69 (eq gnus-picons-display-where 'picons))
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70 '(frame 1.0
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71 (vertical 1.0
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72 (summary 0.25 point)
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73 (if gnus-carpal '(summary-carpal 4))
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74 (article 1.0))
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75 (vertical ((height . 5) (width . 15)
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76 (user-position . t)
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77 (left . -1) (top . 1))
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78 (picons 1.0))))
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79 (gnus-use-trees
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80 '(vertical 1.0
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81 (summary 0.25 point)
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82 (tree 0.25)
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83 (article 1.0)))
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84 (t
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85 '(vertical 1.0
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86 (summary 0.25 point)
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87 (if gnus-carpal '(summary-carpal 4))
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88 (article 1.0)))))
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89 (server
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90 (vertical 1.0
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91 (server 1.0 point)
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92 (if gnus-carpal '(server-carpal 2))))
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93 (browse
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94 (vertical 1.0
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95 (browse 1.0 point)
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96 (if gnus-carpal '(browse-carpal 2))))
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97 (message
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98 (vertical 1.0
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99 (message 1.0 point)))
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100 (pick
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101 (vertical 1.0
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102 (article 1.0 point)))
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103 (info
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104 (vertical 1.0
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105 (info 1.0 point)))
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106 (summary-faq
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107 (vertical 1.0
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108 (summary 0.25)
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109 (faq 1.0 point)))
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110 (edit-article
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111 (vertical 1.0
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112 (article 1.0 point)))
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113 (edit-form
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114 (vertical 1.0
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115 (group 0.5)
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116 (edit-form 1.0 point)))
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117 (edit-score
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118 (vertical 1.0
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119 (summary 0.25)
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120 (edit-score 1.0 point)))
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121 (post
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122 (vertical 1.0
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123 (post 1.0 point)))
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124 (reply
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125 (vertical 1.0
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126 (article-copy 0.5)
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127 (message 1.0 point)))
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128 (forward
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129 (vertical 1.0
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130 (message 1.0 point)))
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131 (reply-yank
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132 (vertical 1.0
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133 (message 1.0 point)))
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134 (mail-bounce
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135 (vertical 1.0
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136 (article 0.5)
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137 (message 1.0 point)))
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138 (draft
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139 (vertical 1.0
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140 (draft 1.0 point)))
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141 (pipe
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142 (vertical 1.0
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143 (summary 0.25 point)
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144 (if gnus-carpal '(summary-carpal 4))
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145 ("*Shell Command Output*" 1.0)))
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146 (bug
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147 (vertical 1.0
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148 ("*Gnus Help Bug*" 0.5)
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149 ("*Gnus Bug*" 1.0 point)))
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150 (score-trace
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151 (vertical 1.0
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152 (summary 0.5 point)
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153 ("*Score Trace*" 1.0)))
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154 (score-words
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155 (vertical 1.0
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156 (summary 0.5 point)
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157 ("*Score Words*" 1.0)))
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158 (compose-bounce
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159 (vertical 1.0
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160 (article 0.5)
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161 (message 1.0 point))))
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162 "Window configuration for all possible Gnus buffers.
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163 See the Gnus manual for an explanation of the syntax used.")
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164
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165 (defvar gnus-window-to-buffer
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166 '((group . gnus-group-buffer)
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167 (summary . gnus-summary-buffer)
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168 (article . gnus-article-buffer)
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169 (server . gnus-server-buffer)
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170 (browse . "*Gnus Browse Server*")
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171 (edit-group . gnus-group-edit-buffer)
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172 (edit-form . gnus-edit-form-buffer)
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173 (edit-server . gnus-server-edit-buffer)
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174 (group-carpal . gnus-carpal-group-buffer)
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175 (summary-carpal . gnus-carpal-summary-buffer)
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176 (server-carpal . gnus-carpal-server-buffer)
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177 (browse-carpal . gnus-carpal-browse-buffer)
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178 (edit-score . gnus-score-edit-buffer)
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179 (message . gnus-message-buffer)
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180 (mail . gnus-message-buffer)
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181 (post-news . gnus-message-buffer)
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182 (faq . gnus-faq-buffer)
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183 (picons . "*Picons*")
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184 (tree . gnus-tree-buffer)
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185 (info . gnus-info-buffer)
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186 (article-copy . gnus-article-copy)
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187 (draft . gnus-draft-buffer))
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188 "Mapping from short symbols to buffer names or buffer variables.")
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189
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190 ;;; Internal variables.
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191
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192 (defvar gnus-current-window-configuration nil
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193 "The most recently set window configuration.")
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194
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195 (defvar gnus-created-frames nil)
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196
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197 (defun gnus-kill-gnus-frames ()
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198 "Kill all frames Gnus has created."
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199 (while gnus-created-frames
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200 (when (frame-live-p (car gnus-created-frames))
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201 ;; We slap a condition-case around this `delete-frame' to ensure
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202 ;; against errors if we try do delete the single frame that's left.
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203 (ignore-errors
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204 (delete-frame (car gnus-created-frames))))
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205 (pop gnus-created-frames)))
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206
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207 (defun gnus-window-configuration-element (list)
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208 (while (and list
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209 (not (assq (car list) gnus-window-configuration)))
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210 (pop list))
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211 (cadr (assq (car list) gnus-window-configuration)))
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212
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213 (defun gnus-windows-old-to-new (setting)
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214 ;; First we take care of the really, really old Gnus 3 actions.
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215 (when (symbolp setting)
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216 (setq setting
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217 ;; Take care of ooold GNUS 3.x values.
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218 (cond ((eq setting 'SelectArticle) 'article)
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219 ((memq setting '(SelectNewsgroup SelectSubject ExpandSubject))
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220 'summary)
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221 ((memq setting '(ExitNewsgroup)) 'group)
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222 (t setting))))
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223 (if (or (listp setting)
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224 (not (and gnus-window-configuration
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225 (memq setting '(group summary article)))))
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226 setting
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227 (let* ((elem
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228 (cond
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229 ((eq setting 'group)
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230 (gnus-window-configuration-element
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231 '(group newsgroups ExitNewsgroup)))
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232 ((eq setting 'summary)
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233 (gnus-window-configuration-element
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234 '(summary SelectNewsgroup SelectSubject ExpandSubject)))
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235 ((eq setting 'article)
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236 (gnus-window-configuration-element
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237 '(article SelectArticle)))))
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238 (total (apply '+ elem))
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239 (types '(group summary article))
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240 (pbuf (if (eq setting 'newsgroups) 'group 'summary))
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241 (i 0)
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242 perc out)
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243 (while (< i 3)
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244 (or (not (numberp (nth i elem)))
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245 (zerop (nth i elem))
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246 (progn
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247 (setq perc (if (= i 2)
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248 1.0
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249 (/ (float (nth i elem)) total)))
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250 (push (if (eq pbuf (nth i types))
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251 (list (nth i types) perc 'point)
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252 (list (nth i types) perc))
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253 out)))
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254 (incf i))
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255 `(vertical 1.0 ,@(nreverse out)))))
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256
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257 ;;;###autoload
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258 (defun gnus-add-configuration (conf)
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259 "Add the window configuration CONF to `gnus-buffer-configuration'."
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260 (setq gnus-buffer-configuration
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261 (cons conf (delq (assq (car conf) gnus-buffer-configuration)
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262 gnus-buffer-configuration))))
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263
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264 (defvar gnus-frame-list nil)
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265
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266 (defun gnus-configure-frame (split &optional window)
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267 "Split WINDOW according to SPLIT."
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268 (unless window
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269 (setq window (get-buffer-window (current-buffer))))
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270 (select-window window)
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271 ;; This might be an old-stylee buffer config.
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272 (when (vectorp split)
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273 (setq split (append split nil)))
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274 (when (or (consp (car split))
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275 (vectorp (car split)))
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276 (push 1.0 split)
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277 (push 'vertical split))
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278 ;; The SPLIT might be something that is to be evaled to
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279 ;; return a new SPLIT.
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280 (while (and (not (assq (car split) gnus-window-to-buffer))
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281 (gnus-functionp (car split)))
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282 (setq split (eval split)))
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283 (let* ((type (car split))
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284 (subs (cddr split))
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285 (len (if (eq type 'horizontal) (window-width) (window-height)))
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286 (total 0)
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287 (window-min-width (or gnus-window-min-width window-min-width))
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288 (window-min-height (or gnus-window-min-height window-min-height))
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289 s result new-win rest comp-subs size sub)
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290 (cond
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291 ;; Nothing to do here.
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292 ((null split))
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293 ;; Don't switch buffers.
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294 ((null type)
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295 (and (memq 'point split) window))
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296 ;; This is a buffer to be selected.
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297 ((not (memq type '(frame horizontal vertical)))
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298 (let ((buffer (cond ((stringp type) type)
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299 (t (cdr (assq type gnus-window-to-buffer)))))
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300 buf)
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301 (unless buffer
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302 (error "Illegal buffer type: %s" type))
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303 (unless (setq buf (get-buffer (if (symbolp buffer)
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304 (symbol-value buffer) buffer)))
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305 (setq buf (get-buffer-create (if (symbolp buffer)
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306 (symbol-value buffer) buffer))))
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307 (switch-to-buffer buf)
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308 ;; We return the window if it has the `point' spec.
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309 (and (memq 'point split) window)))
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310 ;; This is a frame split.
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311 ((eq type 'frame)
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312 (unless gnus-frame-list
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313 (setq gnus-frame-list (list (window-frame
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314 (get-buffer-window (current-buffer))))))
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315 (let ((i 0)
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316 params frame fresult)
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317 (while (< i (length subs))
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318 ;; Frame parameter is gotten from the sub-split.
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319 (setq params (cadr (elt subs i)))
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320 ;; It should be a list.
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321 (unless (listp params)
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322 (setq params nil))
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323 ;; Create a new frame?
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324 (unless (setq frame (elt gnus-frame-list i))
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325 (nconc gnus-frame-list (list (setq frame (make-frame params))))
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326 (push frame gnus-created-frames))
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327 ;; Is the old frame still alive?
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328 (unless (frame-live-p frame)
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329 (setcar (nthcdr i gnus-frame-list)
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330 (setq frame (make-frame params))))
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331 ;; Select the frame in question and do more splits there.
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332 (select-frame frame)
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333 (setq fresult (or (gnus-configure-frame (elt subs i)) fresult))
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334 (incf i))
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335 ;; Select the frame that has the selected buffer.
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336 (when fresult
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337 (select-frame (window-frame fresult)))))
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338 ;; This is a normal split.
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339 (t
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340 (when (> (length subs) 0)
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341 ;; First we have to compute the sizes of all new windows.
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342 (while subs
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343 (setq sub (append (pop subs) nil))
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344 (while (and (not (assq (car sub) gnus-window-to-buffer))
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345 (gnus-functionp (car sub)))
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346 (setq sub (eval sub)))
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347 (when sub
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348 (push sub comp-subs)
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349 (setq size (cadar comp-subs))
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350 (cond ((equal size 1.0)
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351 (setq rest (car comp-subs))
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352 (setq s 0))
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353 ((floatp size)
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354 (setq s (floor (* size len))))
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355 ((integerp size)
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356 (setq s size))
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357 (t
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358 (error "Illegal size: %s" size)))
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359 ;; Try to make sure that we are inside the safe limits.
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360 (cond ((zerop s))
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361 ((eq type 'horizontal)
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362 (setq s (max s window-min-width)))
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363 ((eq type 'vertical)
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364 (setq s (max s window-min-height))))
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365 (setcar (cdar comp-subs) s)
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366 (incf total s)))
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367 ;; Take care of the "1.0" spec.
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368 (if rest
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369 (setcar (cdr rest) (- len total))
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370 (error "No 1.0 specs in %s" split))
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371 ;; The we do the actual splitting in a nice recursive
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372 ;; fashion.
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373 (setq comp-subs (nreverse comp-subs))
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374 (while comp-subs
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375 (if (null (cdr comp-subs))
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376 (setq new-win window)
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377 (setq new-win
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378 (split-window window (cadar comp-subs)
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379 (eq type 'horizontal))))
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380 (setq result (or (gnus-configure-frame
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381 (car comp-subs) window)
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382 result))
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383 (select-window new-win)
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384 (setq window new-win)
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385 (setq comp-subs (cdr comp-subs))))
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386 ;; Return the proper window, if any.
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387 (when result
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388 (select-window result))))))
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389
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390 (defvar gnus-frame-split-p nil)
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391
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392 (defun gnus-configure-windows (setting &optional force)
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393 (setq gnus-current-window-configuration setting)
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394 (setq force (or force gnus-always-force-window-configuration))
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395 (setq setting (gnus-windows-old-to-new setting))
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396 (let ((split (if (symbolp setting)
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397 (cadr (assq setting gnus-buffer-configuration))
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398 setting))
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399 all-visible)
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400
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401 (setq gnus-frame-split-p nil)
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402
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403 (unless split
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404 (error "No such setting: %s" setting))
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405
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406 (if (and (setq all-visible (gnus-all-windows-visible-p split))
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407 (not force))
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408 ;; All the windows mentioned are already visible, so we just
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409 ;; put point in the assigned buffer, and do not touch the
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410 ;; winconf.
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411 (select-window all-visible)
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412
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413 ;; Either remove all windows or just remove all Gnus windows.
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414 (let ((frame (selected-frame)))
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415 (unwind-protect
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416 (if gnus-use-full-window
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417 ;; We want to remove all other windows.
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418 (if (not gnus-frame-split-p)
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419 ;; This is not a `frame' split, so we ignore the
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420 ;; other frames.
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421 (delete-other-windows)
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422 ;; This is a `frame' split, so we delete all windows
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423 ;; on all frames.
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424 (gnus-delete-windows-in-gnusey-frames))
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425 ;; Just remove some windows.
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426 (gnus-remove-some-windows)
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427 (switch-to-buffer nntp-server-buffer))
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428 (select-frame frame)))
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429
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430 (switch-to-buffer nntp-server-buffer)
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431 (gnus-configure-frame split (get-buffer-window (current-buffer))))))
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432
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433 (defun gnus-delete-windows-in-gnusey-frames ()
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434 "Do a `delete-other-windows' in all frames that have Gnus windows."
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435 (let ((buffers
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436 (mapcar
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437 (lambda (elem)
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438 (if (symbolp (cdr elem))
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439 (when (and (boundp (cdr elem))
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440 (symbol-value (cdr elem)))
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441 (get-buffer (symbol-value (cdr elem))))
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442 (when (cdr elem)
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443 (get-buffer (cdr elem)))))
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444 gnus-window-to-buffer)))
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445 (mapcar
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446 (lambda (frame)
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447 (unless (eq (cdr (assq 'minibuffer
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448 (frame-parameters frame)))
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449 'only)
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450 (select-frame frame)
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451 (let (do-delete)
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452 (walk-windows
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453 (lambda (window)
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454 (when (memq (window-buffer window) buffers)
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455 (setq do-delete t))))
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456 (when do-delete
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457 (delete-other-windows)))))
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458 (frame-list))))
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459
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460 (defun gnus-all-windows-visible-p (split)
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461 "Say whether all buffers in SPLIT are currently visible.
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462 In particular, the value returned will be the window that
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463 should have point."
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464 (let ((stack (list split))
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465 (all-visible t)
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466 type buffer win buf)
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467 (while (and (setq split (pop stack))
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468 all-visible)
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469 ;; Be backwards compatible.
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470 (when (vectorp split)
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471 (setq split (append split nil)))
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472 (when (or (consp (car split))
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473 (vectorp (car split)))
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474 (push 1.0 split)
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475 (push 'vertical split))
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476 ;; The SPLIT might be something that is to be evaled to
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477 ;; return a new SPLIT.
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478 (while (and (not (assq (car split) gnus-window-to-buffer))
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479 (gnus-functionp (car split)))
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480 (setq split (eval split)))
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481
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482 (setq type (elt split 0))
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483 (cond
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484 ;; Nothing here.
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485 ((null split) t)
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486 ;; A buffer.
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487 ((not (memq type '(horizontal vertical frame)))
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488 (setq buffer (cond ((stringp type) type)
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489 (t (cdr (assq type gnus-window-to-buffer)))))
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490 (unless buffer
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491 (error "Illegal buffer type: %s" type))
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492 (when (setq buf (get-buffer (if (symbolp buffer)
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493 (symbol-value buffer)
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494 buffer)))
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495 (setq win (get-buffer-window buf t)))
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496 (if win
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497 (when (memq 'point split)
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498 (setq all-visible win))
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499 (setq all-visible nil)))
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500 (t
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501 (when (eq type 'frame)
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502 (setq gnus-frame-split-p t))
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503 (setq stack (append (cddr split) stack)))))
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504 (unless (eq all-visible t)
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505 all-visible)))
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506
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507 (defun gnus-window-top-edge (&optional window)
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508 (nth 1 (window-edges window)))
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509
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510 (defun gnus-remove-some-windows ()
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511 (let ((buffers gnus-window-to-buffer)
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|
512 buf bufs lowest-buf lowest)
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513 (save-excursion
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514 ;; Remove windows on all known Gnus buffers.
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515 (while buffers
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516 (setq buf (cdar buffers))
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517 (when (symbolp buf)
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|
518 (setq buf (and (boundp buf) (symbol-value buf))))
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519 (and buf
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520 (get-buffer-window buf)
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|
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521 (progn
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522 (push buf bufs)
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523 (pop-to-buffer buf)
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524 (when (or (not lowest)
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|
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525 (< (gnus-window-top-edge) lowest))
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|
526 (setq lowest (gnus-window-top-edge))
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|
|
527 (setq lowest-buf buf))))
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|
|
528 (setq buffers (cdr buffers)))
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|
|
529 ;; Remove windows on *all* summary buffers.
|
|
|
530 (walk-windows
|
|
|
531 (lambda (win)
|
|
|
532 (let ((buf (window-buffer win)))
|
|
|
533 (when (string-match "^\\*Summary" (buffer-name buf))
|
|
|
534 (push buf bufs)
|
|
|
535 (pop-to-buffer buf)
|
|
|
536 (when (or (not lowest)
|
|
|
537 (< (gnus-window-top-edge) lowest))
|
|
|
538 (setq lowest-buf buf)
|
|
|
539 (setq lowest (gnus-window-top-edge)))))))
|
|
|
540 (when lowest-buf
|
|
|
541 (pop-to-buffer lowest-buf)
|
|
|
542 (switch-to-buffer nntp-server-buffer))
|
|
|
543 (while bufs
|
|
|
544 (when (not (eq (car bufs) lowest-buf))
|
|
|
545 (delete-windows-on (car bufs)))
|
|
|
546 (setq bufs (cdr bufs))))))
|
|
|
547
|
|
|
548 (provide 'gnus-win)
|
|
|
549
|
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550 ;;; gnus-win.el ends here
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