annotate lisp/list-mode.el @ 290:c9fe270a4101 r21-0b43

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author cvs
date Mon, 13 Aug 2007 10:36:47 +0200
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1 ;;; list-mode.el --- Major mode for buffers containing lists of items
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2
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3 ;; Copyright (C) 1992-4, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1996 Ben Wing.
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5
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Keywords: extensions, dumped
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8
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9 ;; This file is part of XEmacs.
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10
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11 ;; XEmacs is free software; you can redistribute it and/or modify it
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12 ;; under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; XEmacs is distributed in the hope that it will be useful, but
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17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 ;; General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with XEmacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, Inc., 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 ;; Cleanup, merging with FSF by Ben Wing, January 1996
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33
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34 ;;; Code:
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35
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36 (defvar list-mode-extent nil)
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37 (make-variable-buffer-local 'list-mode-extent)
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38
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39 (defvar list-mode-map nil
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40 "Local map for buffers containing lists of items.")
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41 (or list-mode-map
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42 (let ((map (setq list-mode-map (make-sparse-keymap 'list-mode-map))))
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43 (suppress-keymap map)
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44 (define-key map 'button2up 'list-mode-item-mouse-selected)
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45 (define-key map 'button2 'undefined)
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46 (define-key map "\C-m" 'list-mode-item-keyboard-selected)
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47 ;;
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48 ;; The following calls to `substitute-key-definition' losed because
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49 ;; they were based on an incorrect assumption that `forward-char' and
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50 ;; `backward-char' are bound to keys in the global map. This might not
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51 ;; be the case if a user binds motion keys to different functions,
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52 ;; and was not actually the case since 20.5 beta 28 or around.
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53 ;;
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54 ;; (substitute-key-definition 'forward-char 'next-list-mode-item map
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55 ;; global-map)
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56 ;; (substitute-key-definition 'backward-char 'previous-list-mode-item map
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57 ;; global-map)
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58 ;;
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59 ;; We bind standard keys to motion commands instead.
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60 ;;
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61 (dolist (key '(kp-right right (control ?f)))
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62 (define-key map key 'next-list-mode-item))
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63 (dolist (key '(kp-left left (control ?b)))
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64 (define-key map key 'previous-list-mode-item))))
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65
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66 (defun list-mode ()
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67 "Major mode for buffer containing lists of items."
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68 (interactive)
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69 (kill-all-local-variables)
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70 (use-local-map list-mode-map)
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71 (setq mode-name "List")
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72 (setq major-mode 'list-mode)
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73 (make-local-hook 'post-command-hook)
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74 (add-hook 'post-command-hook 'set-list-mode-extent nil t)
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75 (make-local-hook 'pre-command-hook)
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76 (add-hook 'pre-command-hook 'list-mode-extent-pre-hook nil t)
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77 (make-local-variable 'next-line-add-newlines)
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78 (setq next-line-add-newlines nil)
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79 (setq list-mode-extent nil)
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80 (set-specifier text-cursor-visible-p nil (current-buffer))
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81 (setq buffer-read-only t)
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82 (goto-char (point-min))
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83 (run-hooks 'list-mode-hook))
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84
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85 ;; List mode is suitable only for specially formatted data.
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86 (put 'list-mode 'mode-class 'special)
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87
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88 (defvar list-mode-extent-old-point nil
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89 "The value of point when pre-command-hook is called.
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90 Used to determine the direction of motion.")
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91 (make-variable-buffer-local 'list-mode-extent-old-point)
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92
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93 (defun list-mode-extent-pre-hook ()
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94 (setq list-mode-extent-old-point (point))
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95 ;(setq atomic-extent-goto-char-p nil)
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96 )
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97
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98 (defun set-list-mode-extent ()
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99 "Move to the closest list item and set up the extent for it.
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100 This is called from `post-command-hook'."
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101 (cond ((get-char-property (point) 'list-mode-item))
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102 ((and (> (point) (point-min))
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103 (get-char-property (1- (point)) 'list-mode-item))
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104 (goto-char (1- (point))))
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105 (t
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106 (let ((pos (point))
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107 dirflag)
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108 ;this fucks things up more than it helps.
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109 ;atomic-extent-goto-char-p as currently defined is all broken,
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110 ;since it will be triggered if the command *ever* runs goto-char!
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111 ;(if atomic-extent-goto-char-p
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112 ; (setq dirflag 1)
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113 (if (and list-mode-extent-old-point
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114 (> pos list-mode-extent-old-point))
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115 (setq dirflag 1)
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116 (setq dirflag -1))
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117 (next-list-mode-item dirflag)
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118 (or (get-char-property (point) 'list-mode-item)
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119 (next-list-mode-item (- dirflag))))))
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120 (or (and list-mode-extent
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121 (eq (current-buffer) (extent-object list-mode-extent)))
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122 (progn
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123 (setq list-mode-extent (make-extent nil nil (current-buffer)))
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124 (set-extent-face list-mode-extent 'list-mode-item-selected)))
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125 (let ((ex (extent-at (point) nil 'list-mode-item nil 'at)))
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126 (if ex
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127 (progn
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128 (set-extent-endpoints list-mode-extent
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129 (extent-start-position ex)
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130 (extent-end-position ex))
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131 (auto-show-make-region-visible (extent-start-position ex)
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132 (extent-end-position ex)))
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133 (detach-extent list-mode-extent))))
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134
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135 (defun previous-list-mode-item (n)
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136 "Move to the previous item in list-mode."
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137 (interactive "p")
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138 (next-list-mode-item (- n)))
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139
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140 (defun next-list-mode-item (n)
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141 "Move to the next item in list-mode.
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142 With prefix argument N, move N items (negative N means move backward)."
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143 (interactive "p")
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144 (while (and (> n 0) (not (eobp)))
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145 (let ((prop (get-char-property (point) 'list-mode-item))
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146 (end (point-max)))
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147 ;; If in a completion, move to the end of it.
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148 (if prop
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149 (goto-char (next-single-property-change (point) 'list-mode-item
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150 nil end)))
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151 ;; Move to start of next one.
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152 (goto-char (next-single-property-change (point)
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153 'list-mode-item nil end)))
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154 (setq n (1- n)))
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155 (while (and (< n 0) (not (bobp)))
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156 (let ((prop (get-char-property (1- (point)) 'list-mode-item))
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157 (end (point-min)))
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158 ;; If in a completion, move to the start of it.
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159 (if prop
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160 (goto-char (previous-single-property-change
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161 (point) 'list-mode-item nil end)))
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162 ;; Move to end of the previous completion.
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163 (goto-char (previous-single-property-change (point) 'list-mode-item
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164 nil end))
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165 ;; Move to the start of that one.
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166 (goto-char (previous-single-property-change (point) 'list-mode-item nil
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167 end)))
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168 (setq n (1+ n))))
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169
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170 (defun list-mode-item-selected-1 (extent event)
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171 (let ((func (extent-property extent 'list-mode-item-activate-callback))
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172 (user-data (extent-property extent 'list-mode-item-user-data)))
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173 (if func
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174 (funcall func event extent user-data))))
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175
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176 ;; we could make these two be just one function, but we want to be
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177 ;; able to refer to them in DOC strings.
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178
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179 (defun list-mode-item-keyboard-selected ()
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180 (interactive)
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181 (list-mode-item-selected-1 (extent-at (point) (current-buffer)
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182 'list-mode-item nil 'at)
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183 nil))
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184
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185 (defun list-mode-item-mouse-selected (event)
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186 (interactive "e")
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187 ;; Sometimes event-closest-point returns nil.
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188 ;; So beep instead of bombing.
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189 (let ((point (event-closest-point event)))
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190 (if point
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191 (list-mode-item-selected-1 (extent-at point
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192 (event-buffer event)
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193 'list-mode-item nil 'at)
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194 event)
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195 (ding))))
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196
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197 (defun add-list-mode-item (start end &optional buffer activate-callback
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198 user-data)
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199 "Add a new list item in list-mode, from START to END in BUFFER.
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200 BUFFER defaults to the current buffer.
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201 This works by creating an extent for the span of text in question.
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202 If ACTIVATE-CALLBACK is non-nil, it should be a function of three
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203 arguments (EVENT EXTENT USER-DATA) that will be called when button2
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204 is pressed on the extent. USER-DATA comes from the optional
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205 USER-DATA argument."
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206 (let ((extent (make-extent start end buffer)))
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207 (set-extent-property extent 'list-mode-item t)
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208 (set-extent-property extent 'start-open t)
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209 (if activate-callback
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210 (progn
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211 (set-extent-property extent 'mouse-face 'highlight)
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212 (set-extent-property extent 'list-mode-item-activate-callback
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213 activate-callback)
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214 (set-extent-property extent 'list-mode-item-user-data user-data)))
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215 extent))
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216
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217
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218 ;; Define the major mode for lists of completions.
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219
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220
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221 (defvar completion-highlight-first-word-only nil
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222 "*Completion will only highlight the first blank delimited word if t.
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223 If the variable in not t or nil, the string is taken as a regexp to match for end
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224 of highlight")
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225
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226 (defvar completion-setup-hook nil
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227 "Normal hook run at the end of setting up the text of a completion buffer.")
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228
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229 ; Unnecessary FSFmacs crock. We frob the extents directly in
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230 ; display-completion-list, so no "heuristics" like this are necessary.
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231 ;(defvar completion-fixup-function nil
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232 ; "A function to customize how completions are identified in completion lists.
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233 ;`completion-setup-function' calls this function with no arguments
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234 ;each time it has found what it thinks is one completion.
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235 ;Point is at the end of the completion in the completion list buffer.
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236 ;If this function moves point, it can alter the end of that completion.")
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237
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238 (defvar completion-default-help-string
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239 '(concat
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240 (if (device-on-window-system-p)
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241 (substitute-command-keys
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242 "Click \\<list-mode-map>\\[list-mode-item-mouse-selected] on a completion to select it.\n") "")
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243 (substitute-command-keys
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244 "Type \\<minibuffer-local-completion-map>\\[advertised-switch-to-completions] or \\[switch-to-completions] to move to this buffer, for keyboard selection.\n\n"))
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245 "Form the evaluate to get a help string for completion lists.
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246 This string is inserted at the beginning of the buffer.
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247 See `display-completion-list'.")
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248
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249 (defun display-completion-list (completions &rest cl-keys)
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250 "Display the list of completions, COMPLETIONS, using `standard-output'.
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251 Each element may be just a symbol or string or may be a list of two
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252 strings to be printed as if concatenated.
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253 Frob a mousable extent onto each completion. This extent has properties
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254 'mouse-face (so it highlights when the mouse passes over it) and
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cvs
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255 'list-mode-item (so it can be located).
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256
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257 Keywords:
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258 :activate-callback (default is `default-choose-completion')
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259 See `add-list-mode-item'.
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260 :user-data
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261 Value passed to activation callback.
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262 :window-width
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263 If non-nil, width to use in displaying the list, instead of the
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264 actual window's width.
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265 :help-string (default is the value of `completion-default-help-string')
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266 Form to evaluate to get a string to insert at the beginning of
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267 the completion list buffer. This is evaluated when that buffer
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268 is the current buffer and after it has been put into
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269 completion-list-mode.
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270 :reference-buffer (default is the current buffer)
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271 This specifies the value of `completion-reference-buffer' in
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272 the completion buffer. This specifies the buffer (normally a
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273 minibuffer) that `default-choose-completion' will insert the
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274 completion into.
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275
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276 At the end, run the normal hook `completion-setup-hook'.
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277 It can find the completion buffer in `standard-output'.
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278 If `completion-highlight-first-word-only' is non-nil, then only the start
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279 of the string is highlighted."
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280 ;; #### I18N3 should set standard-output to be (temporarily)
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281 ;; output-translating.
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282 (cl-parsing-keywords
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283 ((:activate-callback 'default-choose-completion)
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284 :user-data
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285 :reference-buffer
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286 (:help-string completion-default-help-string)
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287 :window-width)
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288 ()
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289 (let ((old-buffer (current-buffer))
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290 (bufferp (bufferp standard-output)))
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291 (if bufferp
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292 (set-buffer standard-output))
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293 (if (null completions)
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294 (princ (gettext
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295 "There are no possible completions of what you have typed."))
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296 (let ((win-width
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297 (or cl-window-width
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298 (if bufferp
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cvs
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299 ;; This needs fixing for the case of windows
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300 ;; that aren't the same width's the frame.
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301 ;; Sadly, the window it will appear in is not known
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302 ;; until after the text has been made.
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303
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304 ;; We have to use last-nonminibuf-frame here
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305 ;; and not selected-frame because if a
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306 ;; minibuffer-only frame is being used it will
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307 ;; be the selected-frame at the point this is
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308 ;; run. We keep the selected-frame call around
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309 ;; just in case.
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310 (frame-width (or (last-nonminibuf-frame)
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311 (selected-frame)))
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312 80))))
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313 (let ((count 0)
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314 (max-width 0))
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315 ;; Find longest completion
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316 (let ((tail completions))
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317 (while tail
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318 (let* ((elt (car tail))
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319 (len (cond ((stringp elt)
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320 (length elt))
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321 ((and (consp elt)
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322 (stringp (car elt))
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323 (stringp (car (cdr elt))))
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324 (+ (length (car elt))
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325 (length (car (cdr elt)))))
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326 (t
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327 (signal 'wrong-type-argument
41ff10fd062f Import from CVS: tag r20-4b3
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328 (list 'stringp elt))))))
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329 (if (> len max-width)
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330 (setq max-width len))
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331 (setq count (1+ count)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
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332 tail (cdr tail)))))
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333
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334 (setq max-width (+ 2 max-width)) ; at least two chars between cols
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335 (let ((rows (let ((cols (min (/ win-width max-width) count)))
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336 (if (<= cols 1)
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337 count
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338 (progn
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339 ;; re-space the columns
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cvs
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340 (setq max-width (/ win-width cols))
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cvs
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341 (if (/= (% count cols) 0) ; want ceiling...
41ff10fd062f Import from CVS: tag r20-4b3
cvs
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342 (1+ (/ count cols))
41ff10fd062f Import from CVS: tag r20-4b3
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343 (/ count cols)))))))
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344 (princ (gettext "Possible completions are:"))
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345 (let ((tail completions)
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346 (r 0)
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347 (regexp-string
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348 (if (eq t
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349 completion-highlight-first-word-only)
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diff changeset
350 "[ \t]"
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
351 completion-highlight-first-word-only)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
352 (while (< r rows)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
353 (terpri)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
354 (let ((indent 0)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
355 (column 0)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
356 (tail2 tail))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
357 (while tail2
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
358 (let ((elt (car tail2)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
359 (if (/= indent 0)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
360 (if bufferp
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
361 (indent-to indent 2)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
362 (while (progn (write-char ?\ )
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
363 (setq column (1+ column))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
364 (< column indent)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
365 (setq indent (+ indent max-width))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
366 (let ((start (point))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
367 end)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
368 ;; Frob some mousable extents in there too!
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
369 (if (consp elt)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
370 (progn
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
371 (princ (car elt))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
372 (princ (car (cdr elt)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
373 (or bufferp
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
374 (setq column
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
375 (+ column
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
376 (length (car elt))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
377 (length (car (cdr elt)))))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
378 (progn
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
379 (princ elt)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
380 (or bufferp
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
381 (setq column (+ column (length
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
382 elt))))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
383 (add-list-mode-item
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
384 start
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
385 (progn
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
386 (setq end (point))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
387 (or
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
388 (and completion-highlight-first-word-only
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
389 (goto-char start)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
390 (re-search-forward regexp-string end t)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
391 (match-beginning 0))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
392 end))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
393 nil cl-activate-callback cl-user-data)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
394 (goto-char end)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
395 (setq tail2 (nthcdr rows tail2)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
396 (setq tail (cdr tail)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
397 r (1+ r)))))))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
398 (if bufferp
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
399 (set-buffer old-buffer)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
400 (save-excursion
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
401 (let ((mainbuf (or cl-reference-buffer (current-buffer))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
402 (set-buffer standard-output)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
403 (completion-list-mode)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
404 (make-local-variable 'completion-reference-buffer)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
405 (setq completion-reference-buffer mainbuf)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
406 ;;; The value 0 is right in most cases, but not for file name completion.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
407 ;;; so this has to be turned off.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
408 ;;; (setq completion-base-size 0)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
409 (goto-char (point-min))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
410 (let ((buffer-read-only nil))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
411 (insert (eval cl-help-string)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
412 ;; unnecessary FSFmacs crock
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
413 ;;(forward-line 1)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
414 ;;(while (re-search-forward "[^ \t\n]+\\( [^ \t\n]+\\)*" nil t)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
415 ;; (let ((beg (match-beginning 0))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
416 ;; (end (point)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
417 ;; (if completion-fixup-function
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
418 ;; (funcall completion-fixup-function))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
419 ;; (put-text-property beg (point) 'mouse-face 'highlight)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
420 ;; (put-text-property beg (point) 'list-mode-item t)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
421 ;; (goto-char end)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
422 ))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
423 (run-hooks 'completion-setup-hook)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
424
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
425 (defvar completion-display-completion-list-function 'display-completion-list
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
426 "Function to set up the list of completions in the completion buffer.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
427 The function is called with one argument, the sorted list of completions.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
428 Particular minibuffer interface functions (e.g. `read-file-name') may
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
429 want to change this. To do that, set a local value for this variable
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
430 in the minibuffer; that ensures that other minibuffer invocations will
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
431 not be affected.")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
432
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
433 (defun minibuffer-completion-help ()
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
434 "Display a list of possible completions of the current minibuffer contents.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
435 The list of completions is determined by calling `all-completions',
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
436 passing it the current minibuffer contents, the value of
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
437 `minibuffer-completion-table', and the value of
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
438 `minibuffer-completion-predicate'. The list is displayed by calling
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
439 the value of `completion-display-completion-list-function' on the sorted
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
440 list of completions, with the standard output set to the completion
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
441 buffer."
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
442 (interactive)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
443 (message "Making completion list...")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
444 (let ((completions (all-completions (buffer-string)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
445 minibuffer-completion-table
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
446 minibuffer-completion-predicate)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
447 (message nil)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
448 (if (null completions)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
449 (progn
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
450 (ding nil 'no-completion)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
451 (temp-minibuffer-message " [No completions]"))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
452 (with-output-to-temp-buffer "*Completions*"
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
453 (funcall completion-display-completion-list-function
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
454 (sort completions #'string-lessp))))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
455
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
456 (define-derived-mode completion-list-mode list-mode
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
457 "Completion List"
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
458 "Major mode for buffers showing lists of possible completions.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
459 Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
460 to select the completion near point.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
461 Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
462 with the mouse."
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
463 (make-local-variable 'completion-base-size)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
464 (setq completion-base-size nil))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
465
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
466 (let ((map completion-list-mode-map))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
467 (define-key map "\e\e\e" 'delete-completion-window)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
468 (define-key map "\C-g" 'minibuffer-keyboard-quit)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
469 (define-key map "q" 'abort-recursive-edit)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
470 (define-key map " " (lambda () (interactive)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
471 (select-window (minibuffer-window))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
472 (define-key map "\t" (lambda () (interactive)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
473 (select-window (minibuffer-window)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
474
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
475 (defvar completion-reference-buffer nil
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
476 "Record the buffer that was current when the completion list was requested.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
477 This is a local variable in the completion list buffer.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
478 Initial value is nil to avoid some compiler warnings.")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
479
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
480 (defvar completion-base-size nil
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
481 "Number of chars at beginning of minibuffer not involved in completion.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
482 This is a local variable in the completion list buffer
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
483 but it talks about the buffer in `completion-reference-buffer'.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
484 If this is nil, it means to compare text to determine which part
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
485 of the tail end of the buffer's text is involved in completion.")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
486
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
487 (defun delete-completion-window ()
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
488 "Delete the completion list window.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
489 Go to the window from which completion was requested."
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
490 (interactive)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
491 (let ((buf completion-reference-buffer))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
492 (delete-window (selected-window))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
493 (if (get-buffer-window buf)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
494 (select-window (get-buffer-window buf)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
495
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
496 (defun completion-do-in-minibuffer ()
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
497 (interactive "_")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
498 (save-excursion
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
499 (set-buffer (window-buffer (minibuffer-window)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
500 (call-interactively (key-binding (this-command-keys)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
501
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
502 (defun default-choose-completion (event extent buffer)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
503 "Click on an alternative in the `*Completions*' buffer to choose it."
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
504 (and (button-event-p event)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
505 ;; Give temporary modes such as isearch a chance to turn off.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
506 (run-hooks 'mouse-leave-buffer-hook))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
507 (or buffer (setq buffer (symbol-value-in-buffer
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
508 'completion-reference-buffer
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
509 (or (and (button-event-p event)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
510 (event-buffer event))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
511 (current-buffer)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
512 (save-selected-window
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
513 (and (button-event-p event)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
514 (select-window (event-window event)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
515 (if (and (one-window-p t 'selected-frame)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
516 (window-dedicated-p (selected-window)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
517 ;; This is a special buffer's frame
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
518 (iconify-frame (selected-frame))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
519 (or (window-dedicated-p (selected-window))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
520 (bury-buffer))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
521 (choose-completion-string (extent-string extent)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
522 buffer
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
523 completion-base-size))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
524
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
525 ;; Delete the longest partial match for STRING
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
526 ;; that can be found before POINT.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
527 (defun choose-completion-delete-max-match (string)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
528 (let ((len (min (length string)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
529 (- (point) (point-min)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
530 (goto-char (- (point) (length string)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
531 (if completion-ignore-case
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
532 (setq string (downcase string)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
533 (while (and (> len 0)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
534 (let ((tail (buffer-substring (point)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
535 (+ (point) len))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
536 (if completion-ignore-case
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
537 (setq tail (downcase tail)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
538 (not (string= tail (substring string 0 len)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
539 (setq len (1- len))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
540 (forward-char 1))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
541 (delete-char len)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
542
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
543 ;; Switch to BUFFER and insert the completion choice CHOICE.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
544 ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
545 ;; to keep. If it is nil, use choose-completion-delete-max-match instead.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
546 (defun choose-completion-string (choice &optional buffer base-size)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
547 (let ((buffer (or buffer completion-reference-buffer)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
548 ;; If BUFFER is a minibuffer, barf unless it's the currently
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
549 ;; active minibuffer.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
550 (if (and (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
551 (or (not (active-minibuffer-window))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
552 (not (equal buffer
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
553 (window-buffer (active-minibuffer-window))))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
554 (error "Minibuffer is not active for completion")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
555 ;; Insert the completion into the buffer where completion was requested.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
556 (set-buffer buffer)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
557 (if base-size
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
558 (delete-region (+ base-size (point-min)) (point))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
559 (choose-completion-delete-max-match choice))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
560 (insert choice)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
561 (remove-text-properties (- (point) (length choice)) (point)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
562 '(highlight nil))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
563 ;; Update point in the window that BUFFER is showing in.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
564 (let ((window (get-buffer-window buffer t)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
565 (set-window-point window (point)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
566 ;; If completing for the minibuffer, exit it with this choice.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
567 (and (equal buffer (window-buffer (minibuffer-window)))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
568 minibuffer-completion-table
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
569 (exit-minibuffer)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
570
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
571 (define-key minibuffer-local-completion-map [prior]
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
572 'switch-to-completions)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
573 (define-key minibuffer-local-must-match-map [prior]
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
574 'switch-to-completions)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
575 (define-key minibuffer-local-completion-map "\M-v"
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
576 'advertised-switch-to-completions)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
577 (define-key minibuffer-local-must-match-map "\M-v"
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
578 'advertised-switch-to-completions)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
579
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
580 (defalias 'advertised-switch-to-completions 'switch-to-completions)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
581 (defun switch-to-completions ()
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
582 "Select the completion list window."
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
583 (interactive)
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
584 ;; Make sure we have a completions window.
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
585 (or (get-buffer-window "*Completions*")
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
586 (minibuffer-completion-help))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
587 (if (not (get-buffer-window "*Completions*"))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
588 nil
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
589 (select-window (get-buffer-window "*Completions*"))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
590 (goto-char (next-single-property-change (point-min) 'list-mode-item nil
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
591 (point-max)))))
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
592
41ff10fd062f Import from CVS: tag r20-4b3
cvs
parents:
diff changeset
593 ;;; list-mode.el ends here