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0
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1 ;;; list-mode.el
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2 ;; Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
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3 ;; Copyright (C) 1996 Ben Wing.
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4
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5 ;; This file is part of XEmacs.
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6
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7 ;; XEmacs is free software; you can redistribute it and/or modify it
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8 ;; under the terms of the GNU General Public License as published by
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9 ;; the Free Software Foundation; either version 2, or (at your option)
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10 ;; any later version.
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11
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12 ;; XEmacs is distributed in the hope that it will be useful, but
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13 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 ;; General Public License for more details.
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16
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17 ;; You should have received a copy of the GNU General Public License
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18 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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19 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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20
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21 ;; Cleanup, merging with FSF by Ben Wing, January 1996
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22
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23 (defvar list-mode-extent nil)
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24 (make-variable-buffer-local 'list-mode-extent)
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25
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26 (defvar list-mode-map nil
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27 "Local map for buffers containing lists of items.")
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28 (or list-mode-map
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29 (let ((map (setq list-mode-map (make-sparse-keymap 'list-mode-map))))
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30 (suppress-keymap map)
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31 (define-key map 'button2up 'list-mode-item-mouse-selected)
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32 (define-key map 'button2 'undefined)
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33 (define-key map "\C-m" 'list-mode-item-keyboard-selected)
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34 (substitute-key-definition 'forward-char 'next-list-mode-item map
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35 global-map)
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36 (substitute-key-definition 'backward-char 'previous-list-mode-item map
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37 global-map)))
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38
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39 (defun list-mode ()
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40 "Major mode for buffer containing lists of items."
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41 (interactive)
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42 (kill-all-local-variables)
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43 (use-local-map list-mode-map)
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44 (setq mode-name "List")
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45 (setq major-mode 'list-mode)
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46 (make-local-hook 'post-command-hook)
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47 (add-hook 'post-command-hook 'set-list-mode-extent nil t)
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48 (make-local-hook 'pre-command-hook)
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49 (add-hook 'pre-command-hook 'list-mode-extent-pre-hook nil t)
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50 (make-local-variable 'next-line-add-newlines)
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51 (setq next-line-add-newlines nil)
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52 (setq list-mode-extent nil)
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53 (set-specifier text-cursor-visible-p nil (current-buffer))
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54 (setq buffer-read-only t)
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55 (goto-char (point-min))
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56 (run-hooks 'list-mode-hook))
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57
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58 ;; List mode is suitable only for specially formatted data.
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59 (put 'list-mode 'mode-class 'special)
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60
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61 (defvar list-mode-extent-old-point nil
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62 "The value of point when pre-command-hook is called.
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63 Used to determine the direction of motion.")
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64 (make-variable-buffer-local 'list-mode-extent-old-point)
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65
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66 (defun list-mode-extent-pre-hook ()
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67 (setq list-mode-extent-old-point (point))
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68 ;(setq atomic-extent-goto-char-p nil)
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69 )
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70
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71 (defun set-list-mode-extent ()
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72 "Move to the closest list item and set up the extent for it.
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73 This is called from `post-command-hook'."
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74 (cond ((get-char-property (point) 'list-mode-item))
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75 ((and (> (point) (point-min))
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76 (get-char-property (1- (point)) 'list-mode-item))
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77 (goto-char (1- (point))))
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78 (t
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79 (let ((pos (point))
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80 dirflag)
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81 ;this fucks things up more than it helps.
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82 ;atomic-extent-goto-char-p as currently defined is all broken,
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83 ;since it will be triggered if the command *ever* runs goto-char!
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84 ;(if atomic-extent-goto-char-p
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85 ; (setq dirflag 1)
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86 (if (and list-mode-extent-old-point
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87 (> pos list-mode-extent-old-point))
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88 (setq dirflag 1)
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89 (setq dirflag -1))
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90 (next-list-mode-item dirflag)
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91 (or (get-char-property (point) 'list-mode-item)
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92 (next-list-mode-item (- dirflag))))))
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93 (or (and list-mode-extent
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94 (eq (current-buffer) (extent-object list-mode-extent)))
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95 (progn
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96 (setq list-mode-extent (make-extent nil nil (current-buffer)))
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97 (set-extent-face list-mode-extent 'list-mode-item-selected)))
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98 (let ((ex (extent-at (point) nil 'list-mode-item nil 'at)))
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99 (if ex
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100 (progn
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101 (set-extent-endpoints list-mode-extent
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102 (extent-start-position ex)
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103 (extent-end-position ex))
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104 (auto-show-make-region-visible (extent-start-position ex)
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105 (extent-end-position ex)))
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106 (detach-extent list-mode-extent))))
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107
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108 (defun previous-list-mode-item (n)
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109 "Move to the previous item in list-mode."
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110 (interactive "p")
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111 (next-list-mode-item (- n)))
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112
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113 (defun next-list-mode-item (n)
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114 "Move to the next item in list-mode.
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115 WIth prefix argument N, move N items (negative N means move backward)."
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116 (interactive "p")
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117 (while (and (> n 0) (not (eobp)))
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118 (let ((prop (get-char-property (point) 'list-mode-item))
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119 (end (point-max)))
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120 ;; If in a completion, move to the end of it.
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121 (if prop
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122 (goto-char (next-single-property-change (point) 'list-mode-item
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123 nil end)))
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124 ;; Move to start of next one.
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125 (goto-char (next-single-property-change (point)
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126 'list-mode-item nil end)))
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127 (setq n (1- n)))
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128 (while (and (< n 0) (not (bobp)))
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129 (let ((prop (get-char-property (1- (point)) 'list-mode-item))
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130 (end (point-min)))
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131 ;; If in a completion, move to the start of it.
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132 (if prop
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133 (goto-char (previous-single-property-change
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134 (point) 'list-mode-item nil end)))
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135 ;; Move to end of the previous completion.
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136 (goto-char (previous-single-property-change (point) 'list-mode-item
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137 nil end))
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138 ;; Move to the start of that one.
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139 (goto-char (previous-single-property-change (point) 'list-mode-item nil
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140 end)))
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141 (setq n (1+ n))))
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142
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143 (defun list-mode-item-selected-1 (extent event)
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144 (let ((func (extent-property extent 'list-mode-item-activate-callback))
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145 (user-data (extent-property extent 'list-mode-item-user-data)))
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146 (if func
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147 (funcall func event extent user-data))))
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148
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149 ;; we could make these two be just one function, but we want to be
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150 ;; able to refer to them in DOC strings.
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151
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152 (defun list-mode-item-keyboard-selected ()
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153 (interactive)
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154 (list-mode-item-selected-1 (extent-at (point) (current-buffer)
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155 'list-mode-item nil 'at)
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156 nil))
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157
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158 (defun list-mode-item-mouse-selected (event)
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159 (interactive "e")
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160 (list-mode-item-selected-1 (extent-at (event-closest-point event)
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161 (event-buffer event)
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162 'list-mode-item nil 'at)
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163 event))
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164
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165 (defun add-list-mode-item (start end &optional buffer activate-callback
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166 user-data)
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167 "Add a new list item in list-mode, from START to END in BUFFER.
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168 BUFFER defaults to the current buffer.
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169 This works by creating an extent for the span of text in question.
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170 If ACTIVATE-CALLBACK is non-nil, it should be a function of three
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171 arguments (EVENT EXTENT USER-DATA) that will be called when button2
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172 is pressed on the extent. USER-DATA comes from the optional
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173 USER-DATA argument."
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174 (let ((extent (make-extent start end buffer)))
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175 (set-extent-property extent 'list-mode-item t)
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176 (set-extent-property extent 'start-open t)
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177 (if activate-callback
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178 (progn
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179 (set-extent-property extent 'mouse-face 'highlight)
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180 (set-extent-property extent 'list-mode-item-activate-callback
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181 activate-callback)
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182 (set-extent-property extent 'list-mode-item-user-data user-data)))
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183 extent))
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184
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185
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186 ;; Define the major mode for lists of completions.
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187
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188
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189 (defvar completion-highlight-first-word-only nil
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190 "*Completion will only hightlight the first blank delimited word if t.
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191 If the variable in not t or nil, the string is taken as a regexp to match for end
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192 of highlight")
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193
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194 (defvar completion-setup-hook nil
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195 "Normal hook run at the end of setting up the text of a completion buffer.")
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196
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197 ; Unnecessary FSFmacs crock. We frob the extents directly in
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198 ; display-completion-list, so no "heuristics" like this are necessary.
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199 ;(defvar completion-fixup-function nil
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200 ; "A function to customize how completions are identified in completion lists.
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201 ;`completion-setup-function' calls this function with no arguments
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202 ;each time it has found what it thinks is one completion.
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203 ;Point is at the end of the completion in the completion list buffer.
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204 ;If this function moves point, it can alter the end of that completion.")
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205
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206 (defvar completion-default-help-string
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207 '(concat
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208 (if (device-on-window-system-p)
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209 (substitute-command-keys
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210 "Click \\<list-mode-map>\\[list-mode-item-mouse-selected] on a completion to select it.\n") "")
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211 (substitute-command-keys
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212 "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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213 "Form the evaluate to get a help string for completion lists.
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214 This string is inserted at the beginning of the buffer.
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215 See `display-completion-list'.")
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216
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217 (defun display-completion-list (completions &rest cl-keys)
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218 "Display the list of completions, COMPLETIONS, using `standard-output'.
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219 Each element may be just a symbol or string or may be a list of two
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220 strings to be printed as if concatenated.
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221 Frob a mousable extent onto each completion. This extent has properties
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222 'mouse-face (so it highlights when the mouse passes over it) and
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223 'list-mode-item (so it can be located).
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224
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225 Keywords:
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226 :activate-callback (default is `default-choose-completion')
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227 See `add-list-mode-item'.
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228 :user-data
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229 Value passed to activation callback.
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230 :window-width
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231 If non-nil, width to use in displaying the list, instead of the
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232 actual window's width.
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233 :help-string (default is the value of `completion-default-help-string')
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234 Form to evaluate to get a string to insert at the beginning of
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235 the completion list buffer. This is evaluated when that buffer
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236 is the current buffer and after it has been put into
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237 completion-list-mode.
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238 :reference-buffer (default is the current buffer)
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239 This specifies the value of `completion-reference-buffer' in
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240 the completion buffer. This specifies the buffer (normally a
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241 minibuffer) that `default-choose-completion' will insert the
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242 completion into.
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243
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244 At the end, run the normal hook `completion-setup-hook'.
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245 It can find the completion buffer in `standard-output'.
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246 If `completion-highlight-first-word-only' is non-nil, then only the start
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247 of the string is highlighted."
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248 ;; #### I18N3 should set standard-output to be (temporarily)
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249 ;; output-translating.
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250 (cl-parsing-keywords
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251 ((:activate-callback 'default-choose-completion)
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252 :user-data
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253 :reference-buffer
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254 (:help-string completion-default-help-string)
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255 :window-width)
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256 ()
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257 (let ((old-buffer (current-buffer))
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258 (bufferp (bufferp standard-output)))
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259 (if bufferp
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260 (set-buffer standard-output))
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261 (if (null completions)
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262 (princ (gettext
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263 "There are no possible completions of what you have typed."))
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264 (let ((win-width
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265 (or cl-window-width
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266 (if bufferp
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267 ;; This needs fixing for the case of windows
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268 ;; that aren't the same width's the frame.
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269 ;; Sadly, the window it will appear in is not known
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270 ;; until after the text has been made.
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271
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272 ;; We have to use last-nonminibuf-frame here
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273 ;; and not selected-frame because if a
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274 ;; minibuffer-only frame is being used it will
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275 ;; be the selected-frame at the point this is
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276 ;; run. We keep the selected-frame call around
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277 ;; just in case.
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278 (frame-width (or (last-nonminibuf-frame)
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279 (selected-frame)))
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280 80))))
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281 (let ((count 0)
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282 (max-width 0))
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283 ;; Find longest completion
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284 (let ((tail completions))
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285 (while tail
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286 (let* ((elt (car tail))
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287 (len (cond ((stringp elt)
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288 (length elt))
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289 ((and (consp elt)
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290 (stringp (car elt))
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291 (stringp (car (cdr elt))))
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292 (+ (length (car elt))
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293 (length (car (cdr elt)))))
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294 (t
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295 (signal 'wrong-type-argument
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296 (list 'stringp elt))))))
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297 (if (> len max-width)
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298 (setq max-width len))
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299 (setq count (1+ count)
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300 tail (cdr tail)))))
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301
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302 (setq max-width (+ 2 max-width)) ; at least two chars between cols
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303 (let ((rows (let ((cols (min (/ win-width max-width) count)))
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304 (if (<= cols 1)
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305 count
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306 (progn
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307 ;; re-space the columns
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308 (setq max-width (/ win-width cols))
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309 (if (/= (% count cols) 0) ; want ceiling...
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310 (1+ (/ count cols))
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311 (/ count cols)))))))
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312 (princ (gettext "Possible completions are:"))
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313 (let ((tail completions)
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314 (r 0)
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315 (regexp-string
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316 (if (eq t
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317 completion-highlight-first-word-only)
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318 "[ \t]"
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319 completion-highlight-first-word-only)))
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320 (while (< r rows)
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321 (terpri)
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322 (let ((indent 0)
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323 (column 0)
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324 (tail2 tail))
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325 (while tail2
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326 (let ((elt (car tail2)))
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327 (if (/= indent 0)
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328 (if bufferp
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329 (indent-to indent 2)
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330 (while (progn (write-char ?\ )
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331 (setq column (1+ column))
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332 (< column indent)))))
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333 (setq indent (+ indent max-width))
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334 (let ((start (point))
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335 end)
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336 ;; Frob some mousable extents in there too!
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337 (if (consp elt)
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338 (progn
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339 (princ (car elt))
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340 (princ (car (cdr elt)))
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341 (or bufferp
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342 (setq column
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343 (+ column
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344 (length (car elt))
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345 (length (car (cdr elt)))))))
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346 (progn
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347 (princ elt)
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348 (or bufferp
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349 (setq column (+ column (length
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350 elt))))))
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351 (add-list-mode-item
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352 start
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353 (progn
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354 (setq end (point))
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355 (or
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356 (and completion-highlight-first-word-only
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357 (goto-char start)
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358 (re-search-forward regexp-string end t)
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359 (match-beginning 0))
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360 end))
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361 nil cl-activate-callback cl-user-data)
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362 (goto-char end)))
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363 (setq tail2 (nthcdr rows tail2)))
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364 (setq tail (cdr tail)
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365 r (1+ r)))))))))
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366 (if bufferp
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367 (set-buffer old-buffer)))
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368 (save-excursion
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369 (let ((mainbuf (or cl-reference-buffer (current-buffer))))
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370 (set-buffer standard-output)
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371 (completion-list-mode)
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372 (make-local-variable 'completion-reference-buffer)
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373 (setq completion-reference-buffer mainbuf)
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374 ;;; The value 0 is right in most cases, but not for file name completion.
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375 ;;; so this has to be turned off.
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376 ;;; (setq completion-base-size 0)
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377 (goto-char (point-min))
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378 (let ((buffer-read-only nil))
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379 (insert (eval cl-help-string)))
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380 ;; unnecessary FSFmacs crock
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381 ;;(forward-line 1)
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382 ;;(while (re-search-forward "[^ \t\n]+\\( [^ \t\n]+\\)*" nil t)
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383 ;; (let ((beg (match-beginning 0))
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384 ;; (end (point)))
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385 ;; (if completion-fixup-function
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386 ;; (funcall completion-fixup-function))
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387 ;; (put-text-property beg (point) 'mouse-face 'highlight)
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388 ;; (put-text-property beg (point) 'list-mode-item t)
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389 ;; (goto-char end)))))
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390 ))
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391 (run-hooks 'completion-setup-hook)))
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392
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393 (defvar completion-display-completion-list-function 'display-completion-list
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394 "Function to set up the list of completions in the completion buffer.
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395 The function is called with one argument, the sorted list of completions.
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396 Particular minibuffer interface functions (e.g. `read-file-name') may
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397 want to change this. To do that, set a local value for this variable
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398 in the minibuffer; that ensures that other minibuffer invocations will
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399 not be affected.")
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400
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401 (defun minibuffer-completion-help ()
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402 "Display a list of possible completions of the current minibuffer contents.
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403 The list of completions is determined by calling `all-completions',
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404 passing it the current minibuffer contents, the value of
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405 `minibuffer-completion-table', and the value of
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406 `minibuffer-completion-predicate'. The list is displayed by calling
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407 the value of `completion-display-completion-list-function' on the sorted
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408 list of completions, with the standard output set to the completion
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409 buffer."
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410 (interactive)
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411 (message "Making completion list...")
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412 (let ((completions (all-completions (buffer-string)
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413 minibuffer-completion-table
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414 minibuffer-completion-predicate)))
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415 (message nil)
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416 (if (null completions)
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417 (progn
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418 (ding nil 'no-completion)
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419 (temp-minibuffer-message " [No completions]"))
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420 (with-output-to-temp-buffer "*Completions*"
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421 (funcall completion-display-completion-list-function
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422 (sort completions #'string-lessp))))))
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423
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424 (define-derived-mode completion-list-mode list-mode
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425 "Completion List"
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426 "Major mode for buffers showing lists of possible completions.
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427 Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
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428 to select the completion near point.
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429 Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\
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430 with the mouse."
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431 (make-local-variable 'completion-base-size)
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432 (setq completion-base-size nil))
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433
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434 (let ((map completion-list-mode-map))
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435 (define-key map "\e\e\e" 'delete-completion-window)
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436 (define-key map "\C-g" 'minibuffer-keyboard-quit)
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437 (define-key map "q" 'abort-recursive-edit)
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438 (define-key map " " (lambda () (interactive)
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439 (select-window (minibuffer-window))))
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440 (define-key map "\t" (lambda () (interactive)
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441 (select-window (minibuffer-window)))))
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442
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443 (defvar completion-reference-buffer nil
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444 "Record the buffer that was current when the completion list was requested.
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445 This is a local variable in the completion list buffer.
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446 Initial value is nil to avoid some compiler warnings.")
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447
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448 (defvar completion-base-size nil
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449 "Number of chars at beginning of minibuffer not involved in completion.
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450 This is a local variable in the completion list buffer
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451 but it talks about the buffer in `completion-reference-buffer'.
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452 If this is nil, it means to compare text to determine which part
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453 of the tail end of the buffer's text is involved in completion.")
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454
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455 (defun delete-completion-window ()
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456 "Delete the completion list window.
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457 Go to the window from which completion was requested."
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458 (interactive)
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459 (let ((buf completion-reference-buffer))
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460 (delete-window (selected-window))
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461 (if (get-buffer-window buf)
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462 (select-window (get-buffer-window buf)))))
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463
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464 (defun completion-do-in-minibuffer ()
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465 (interactive "_")
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466 (save-excursion
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467 (set-buffer (window-buffer (minibuffer-window)))
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468 (call-interactively (key-binding (this-command-keys)))))
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469
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470 (defun default-choose-completion (event extent buffer)
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471 "Click on an alternative in the `*Completions*' buffer to choose it."
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472 (and (button-event-p event)
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473 ;; Give temporary modes such as isearch a chance to turn off.
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474 (run-hooks 'mouse-leave-buffer-hook))
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475 (or buffer (setq buffer (symbol-value-in-buffer
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476 'completion-reference-buffer
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477 (or (and (button-event-p event)
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478 (event-buffer event))
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479 (current-buffer)))))
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480 (save-selected-window
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481 (and (button-event-p event)
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482 (select-window (event-window event)))
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483 (if (and (one-window-p t 'selected-frame)
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484 (window-dedicated-p (selected-window)))
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485 ;; This is a special buffer's frame
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486 (iconify-frame (selected-frame))
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487 (or (window-dedicated-p (selected-window))
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488 (bury-buffer))))
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489 (choose-completion-string (extent-string extent)
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490 buffer
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491 completion-base-size))
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492
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493 ;; Delete the longest partial match for STRING
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494 ;; that can be found before POINT.
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495 (defun choose-completion-delete-max-match (string)
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496 (let ((len (min (length string)
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497 (- (point) (point-min)))))
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498 (goto-char (- (point) (length string)))
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499 (if completion-ignore-case
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500 (setq string (downcase string)))
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501 (while (and (> len 0)
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502 (let ((tail (buffer-substring (point)
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503 (+ (point) len))))
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504 (if completion-ignore-case
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505 (setq tail (downcase tail)))
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506 (not (string= tail (substring string 0 len)))))
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507 (setq len (1- len))
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508 (forward-char 1))
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509 (delete-char len)))
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510
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511 ;; Switch to BUFFER and insert the completion choice CHOICE.
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512 ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text
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513 ;; to keep. If it is nil, use choose-completion-delete-max-match instead.
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514 (defun choose-completion-string (choice &optional buffer base-size)
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515 (let ((buffer (or buffer completion-reference-buffer)))
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516 ;; If BUFFER is a minibuffer, barf unless it's the currently
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517 ;; active minibuffer.
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518 (if (and (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer))
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519 (or (not (active-minibuffer-window))
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520 (not (equal buffer
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521 (window-buffer (active-minibuffer-window))))))
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522 (error "Minibuffer is not active for completion")
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523 ;; Insert the completion into the buffer where completion was requested.
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524 (set-buffer buffer)
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525 (if base-size
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526 (delete-region (+ base-size (point-min)) (point))
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527 (choose-completion-delete-max-match choice))
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528 (insert choice)
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529 (remove-text-properties (- (point) (length choice)) (point)
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530 '(highlight nil))
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531 ;; Update point in the window that BUFFER is showing in.
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|
532 (let ((window (get-buffer-window buffer t)))
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|
533 (set-window-point window (point)))
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534 ;; If completing for the minibuffer, exit it with this choice.
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|
535 (and (equal buffer (window-buffer (minibuffer-window)))
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536 minibuffer-completion-table
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|
537 (exit-minibuffer)))))
|
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538
|
|
|
539 (define-key minibuffer-local-completion-map [prior]
|
|
|
540 'switch-to-completions)
|
|
|
541 (define-key minibuffer-local-must-match-map [prior]
|
|
|
542 'switch-to-completions)
|
|
|
543 (define-key minibuffer-local-completion-map "\M-v"
|
|
|
544 'advertised-switch-to-completions)
|
|
|
545 (define-key minibuffer-local-must-match-map "\M-v"
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|
|
546 'advertised-switch-to-completions)
|
|
|
547
|
|
|
548 (defalias 'advertised-switch-to-completions 'switch-to-completions)
|
|
|
549 (defun switch-to-completions ()
|
|
|
550 "Select the completion list window."
|
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|
551 (interactive)
|
|
|
552 ;; Make sure we have a completions window.
|
|
|
553 (or (get-buffer-window "*Completions*")
|
|
|
554 (minibuffer-completion-help))
|
|
|
555 (if (not (get-buffer-window "*Completions*"))
|
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|
556 nil
|
|
|
557 (select-window (get-buffer-window "*Completions*"))
|
|
|
558 (goto-char (next-single-property-change (point-min) 'list-mode-item nil
|
|
|
559 (point-max)))))
|
