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1 ;;; Minibuffer read functions for VM
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2 ;;; Copyright (C) 1993, 1994 Kyle E. Jones
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3 ;;;
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4 ;;; This program is free software; you can redistribute it and/or modify
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5 ;;; it under the terms of the GNU General Public License as published by
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6 ;;; the Free Software Foundation; either version 1, or (at your option)
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7 ;;; any later version.
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8 ;;;
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9 ;;; This program is distributed in the hope that it will be useful,
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10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ;;; GNU General Public License for more details.
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13 ;;;
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14 ;;; You should have received a copy of the GNU General Public License
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15 ;;; along with this program; if not, write to the Free Software
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16 ;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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17
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18 (provide 'vm-minibuf)
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19
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20 (defun vm-minibuffer-complete-word (&optional exiting)
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21 (interactive)
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22 (let ((opoint (point))
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23 trimmed-c-list c-list beg end diff word word-prefix-regexp completion)
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24 ;; find the beginning and end of the word we're trying to complete
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25 (if (or (eobp) (memq (following-char) '(?\t ?\n ?\ )))
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26 (progn
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27 (skip-chars-backward " \t\n")
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28 (and (not (eobp)) (forward-char))
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29 (setq end (point)))
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30 (skip-chars-forward "^ \t\n")
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31 (setq end (point)))
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32 (skip-chars-backward "^ \t\n")
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33 (setq beg (point))
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34 (goto-char opoint)
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35 ;; copy the word into a string
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36 (setq word (buffer-substring beg end))
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37 ;; trim the completion list down to just likely candidates
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38 ;; then convert it to an alist.
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39 (setq word-prefix-regexp (concat "^" (regexp-quote word))
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40 trimmed-c-list (vm-delete-non-matching-strings
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41 word-prefix-regexp
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42 vm-minibuffer-completion-table)
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43 trimmed-c-list (mapcar 'list trimmed-c-list)
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44 c-list (mapcar 'list vm-minibuffer-completion-table))
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45 ;; Try the word against the completion list.
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46 (and trimmed-c-list
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47 (setq completion (try-completion word trimmed-c-list)))
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48 ;; If completion is nil, figure out what prefix of the word would prefix
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49 ;; something in the completion list... but only if the user is interested.
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50 (if (and (null completion) vm-completion-auto-correct c-list)
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51 (let ((i -1))
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52 (while (null (setq completion
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53 (try-completion (substring word 0 i) c-list)))
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54 (vm-decrement i))
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55 (setq completion (substring word 0 i))))
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56 ;; If completion is t, we had a perfect match already.
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57 (if (eq completion t)
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58 (cond ((and (cdr trimmed-c-list)
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59 (not (eq last-command 'vm-minibuffer-complete-word)))
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60 (and (not exiting)
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61 (vm-minibuffer-completion-message
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62 "[Complete, but not unique]")))
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63 (vm-completion-auto-space
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64 (goto-char end)
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65 (insert " "))
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66 (t
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67 (and (not exiting)
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68 (vm-minibuffer-completion-message "[Sole completion]"))))
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69 ;; Compute the difference in length between the completion and the
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70 ;; word. A negative difference means no match and the magnitude
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71 ;; indicates the number of chars that need to be shaved off the end
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72 ;; before a match will occur. A positive difference means a match
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73 ;; occurred and the magnitude specifies the number of new chars that
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74 ;; can be appended to the word as a completion.
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75 ;;
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76 ;; `completion' can be nil here, but the code works anyway because
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77 ;; (length nil) still equals 0!
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78 (setq diff (- (length completion) (length word)))
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79 (cond
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80 ;; We have some completion chars. Insert them.
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81 ((> diff 0)
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82 (goto-char end)
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83 (insert (substring completion (- diff)))
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84 (if (and vm-completion-auto-space
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85 (null (cdr trimmed-c-list)))
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86 (insert " ")))
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87 ;; The word prefixed more than one string, but we can't complete
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88 ;; any further. Either give help or say "Ambiguous".
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89 ((zerop diff)
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90 (and (not exiting)
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91 (if (null completion-auto-help)
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92 (vm-minibuffer-completion-message "[Ambiguous]")
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93 (vm-minibuffer-show-completions (sort
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94 (mapcar 'car trimmed-c-list)
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95 'string-lessp)))))
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96 ;; The word didn't prefix anything... if vm-completion-auto-correct is
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97 ;; non-nil strip the offending characters and try again.
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98 (vm-completion-auto-correct
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99 (goto-char end)
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100 (delete-char diff)
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101 (vm-minibuffer-complete-word exiting))
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102 ;; if we're not auto-correcting and we're doing
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103 ;; multi-word, just let the user insert a space.
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104 (vm-completion-auto-space
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105 (insert " "))
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106 ;; completion utterly failed, tell the user so.
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107 (t
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108 (and (not exiting)
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109 (vm-minibuffer-completion-message "[No match]")))))))
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110
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111 (defun vm-minibuffer-complete-word-and-exit ()
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112 (interactive)
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113 (vm-minibuffer-complete-word t)
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114 (exit-minibuffer))
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115
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116 (defun vm-minibuffer-completion-message (string &optional seconds)
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117 "Briefly display STRING to the right of the current minibuffer input.
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118 Optional second arg SECONDS specifies how long to keep the message visible;
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119 the default is 2 seconds.
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120
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121 A keypress causes the immediate erasure of the STRING, and return of control
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122 to the calling program."
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123 (let (omax (inhibit-quit t))
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124 (save-excursion
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125 (goto-char (point-max))
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126 (setq omax (point))
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127 (insert " " string))
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128 (sit-for (or seconds 2))
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129 (delete-region omax (point-max))))
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130
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131 (defun vm-minibuffer-replace-word (word)
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132 (goto-char (point-max))
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133 (skip-chars-backward "^ \t\n")
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134 (delete-region (point) (point-max))
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135 (insert word))
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136
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137 (defun vm-minibuffer-show-completions (list)
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138 "Display LIST in a multi-column listing in the \" *Completions*\" buffer.
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139 LIST should be a list of strings."
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140 (save-excursion
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141 (set-buffer (get-buffer-create " *Completions*"))
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142 (setq buffer-read-only nil)
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143 (use-local-map (make-sparse-keymap))
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144 ;; ignore vm-mutable-* here. the user shouldn't mind
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145 ;; because when they exit the minibuffer the windows will be
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146 ;; set right again.
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147 (display-buffer (current-buffer))
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148 (erase-buffer)
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149 (insert "Possible completions are:\n")
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150 (setq buffer-read-only t)
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151 (vm-show-list list 'vm-minibuffer-replace-word
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152 (list (current-local-map) minibuffer-local-map))
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153 (goto-char (point-min))))
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154
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155 (defun vm-show-list (list &optional function keymaps)
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156 "Display LIST in a multi-column listing in the current buffer at point.
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157 The current buffer must be displayed in some window at the time
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158 this function is called.
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159
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160 LIST should be a list of strings.
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161
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162 Optional second argument FUNCTION will be called if the mouse is
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163 clicked on one of the strings in the current buffer. The string
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164 clicked upon will be passed to FUNCTION as its sole argument.
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165
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166 Optional third argument KEYMAPS specifies a lists of keymaps
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167 where the FUNCTION should be bound to the mouse clicks. By
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168 default the local keymap of the current buffer is used."
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169 (or keymaps (setq keymaps (and (current-local-map)
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170 (list (current-local-map)))))
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171 (save-excursion
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172 (let ((buffer-read-only nil)
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173 tab-stops longest rows columns list-length q i w start command
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174 keymap)
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175 (cond ((and function keymaps (vm-mouse-support-possible-p))
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176 (setq command
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177 (list 'lambda '(e) '(interactive "e")
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178 (list 'let
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179 '((string (vm-mouse-get-mouse-track-string e)))
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180 (list 'and 'string (list function 'string)))))
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181 (while keymaps
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182 (setq keymap (car keymaps))
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183 (cond ((vm-mouse-xemacs-mouse-p)
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184 (define-key keymap 'button1 command)
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185 (define-key keymap 'button2 command))
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186 ((vm-mouse-fsfemacs-mouse-p)
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187 (define-key keymap [down-mouse-1] 'ignore)
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188 (define-key keymap [drag-mouse-1] 'ignore)
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189 (define-key keymap [mouse-1] command)
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190 (define-key keymap [drag-mouse-2] 'ignore)
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191 (define-key keymap [down-mouse-2] 'ignore)
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192 (define-key keymap [mouse-2] command)))
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193 (setq keymaps (cdr keymaps)))))
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194 (setq w (vm-get-buffer-window (current-buffer)))
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195 (setq q list
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196 list-length 0
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197 longest 0)
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198 (while q
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199 (setq longest (max longest (length (car q)))
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200 list-length (1+ list-length)
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201 q (cdr q)))
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202 ;; provide for separation between columns
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203 (setq longest (+ 3 longest))
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204 (setq columns (max 1 (/ (- (window-width w) 2) longest))
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205 rows (/ list-length columns)
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206 rows
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207 (+ (if (zerop (% list-length columns)) 0 1)
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208 rows))
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209 (setq i columns
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210 tab-stops nil)
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211 (while (not (zerop i))
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212 (setq tab-stops (cons (* longest i) tab-stops)
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213 i (1- i)))
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214 (setq q list
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215 i 0)
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216 (while q
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217 (setq start (point))
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218 (insert (car q))
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219 (and function (vm-mouse-set-mouse-track-highlight start (point)))
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220 (setq i (1+ i)
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221 q (cdr q))
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222 (if (zerop (% i columns))
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223 (insert "\n")
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224 (let ((tab-stop-list tab-stops))
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225 (tab-to-tab-stop)))))))
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226
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227 (defun vm-minibuffer-completion-help ()
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228 (interactive)
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229 (let ((opoint (point))
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230 c-list beg end word word-prefix-regexp)
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231 ;; find the beginning and end of the word we're trying to complete
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232 (if (or (eobp) (memq (following-char) '(?\t ?\n ?\ )))
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233 (progn
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234 (skip-chars-backward " \t\n")
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235 (and (not (eobp)) (forward-char))
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236 (setq end (point)))
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237 (skip-chars-forward "^ \t\n")
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238 (setq end (point)))
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239 (skip-chars-backward "^ \t\n")
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240 (setq beg (point))
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241 (goto-char opoint)
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242 ;; copy the word into a string
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243 (setq word (buffer-substring beg end))
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244 ;; trim the completion list down to just likely candidates
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245 ;; then convert it to an alist.
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246 (setq word-prefix-regexp (concat "^" (regexp-quote word))
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247 c-list (vm-delete-non-matching-strings
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248 word-prefix-regexp
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249 vm-minibuffer-completion-table)
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250 c-list (sort c-list (function string-lessp)))
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251 (if c-list
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252 (vm-minibuffer-show-completions c-list)
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253 (vm-minibuffer-completion-message " [No match]"))))
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254
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255 (defun vm-keyboard-read-string (prompt completion-list &optional multi-word)
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256 (let ((minibuffer-local-map (copy-keymap minibuffer-local-map))
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257 (vm-completion-auto-space multi-word)
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258 (vm-minibuffer-completion-table completion-list))
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259 (define-key minibuffer-local-map "\t" 'vm-minibuffer-complete-word)
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260 (define-key minibuffer-local-map " " 'vm-minibuffer-complete-word)
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261 (define-key minibuffer-local-map "?" 'vm-minibuffer-completion-help)
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262 (if (not multi-word)
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263 (define-key minibuffer-local-map "\r"
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264 'vm-minibuffer-complete-word-and-exit))
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20
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265 ;; evade the XEmacs dialox box, yeccch.
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266 (let ((should-use-dialog-box nil))
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267 (read-string prompt))))
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268
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269 (defvar last-nonmenu-event)
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270
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271 (defun vm-read-string (prompt completion-list &optional multi-word)
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272 ;; handle alist
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273 (if (consp (car completion-list))
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274 (setq completion-list (nreverse (mapcar 'car completion-list))))
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275 (if (and completion-list (vm-mouse-support-possible-p))
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276 (cond ((and (vm-mouse-xemacs-mouse-p)
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277 (or (button-press-event-p last-command-event)
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278 (button-release-event-p last-command-event)
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279 (menu-event-p last-command-event)))
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280 (vm-mouse-read-string prompt completion-list multi-word))
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281 ((and (vm-mouse-fsfemacs-mouse-p)
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282 (listp last-nonmenu-event))
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283 (vm-mouse-read-string prompt completion-list multi-word))
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284 (t
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285 (vm-keyboard-read-string prompt completion-list multi-word)))
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286 (vm-keyboard-read-string prompt completion-list multi-word)))
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287
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288 (defun vm-read-number (prompt)
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289 (let (result)
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290 (while
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291 (null
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292 (string-match "^[ \t]*-?[0-9]+" (setq result (read-string prompt)))))
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293 (string-to-int result)))
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294
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295 (defun vm-read-password (prompt &optional confirm)
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296 "Read and return a password from the minibuffer, prompting with PROMPT.
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297 Optional second argument CONFIRM non-nil means that the user will be asked
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298 to type the password a second time for confirmation and if there is a
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299 mismatch, the process is repeated.
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300
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301 Line editing keys are:
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302 C-h, DEL rubout
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303 C-u, C-x line kill
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304 C-q, C-v literal next"
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305 (catch 'return-value
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306 (save-excursion
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307 (let ((cursor-in-echo-area t)
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308 (echo-keystrokes 0)
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309 (input-buffer nil)
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310 (help-form nil)
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311 (xxx "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
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312 (string nil)
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313 char done form)
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314 (unwind-protect
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315 (save-excursion
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316 (setq input-buffer (get-buffer-create " *password*"))
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317 (set-buffer input-buffer)
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318 (while t
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319 (erase-buffer)
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320 (vm-unsaved-message "%s%s" prompt
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321 (vm-truncate-string xxx (buffer-size)))
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322 (while (not (memq (setq char (read-char)) '(?\C-m ?\C-j)))
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323 (if (setq form
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324 (cdr
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325 (assq char
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326 '((?\C-h . (delete-char -1))
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327 (?\C-? . (delete-char -1))
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328 (?\C-u . (delete-region 1 (point)))
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329 (?\C-x . (delete-region 1 (point)))
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330 (?\C-q . (quoted-insert 1))
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331 (?\C-v . (quoted-insert 1))))))
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332 (condition-case error-data
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333 (eval form)
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334 (error t))
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335 (insert char))
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336 (vm-unsaved-message "%s%s" prompt
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337 (vm-truncate-string xxx (buffer-size))))
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338 (cond ((and confirm string)
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339 (cond ((not (string= string (buffer-string)))
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340 (vm-unsaved-message
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341 (concat prompt
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342 (vm-truncate-string xxx (buffer-size))
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343 " [Mismatch... try again.]"))
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344 (ding)
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345 (sit-for 2)
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346 (setq string nil))
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347 (t (throw 'return-value string))))
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348 (confirm
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349 (setq string (buffer-string))
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350 (vm-unsaved-message
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351 (concat prompt
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352 (vm-truncate-string xxx (buffer-size))
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353 " [Retype to confirm...]"))
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354 (sit-for 2))
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355 (t
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356 (vm-unsaved-message "")
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357 (throw 'return-value (buffer-string))))))
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358 (and input-buffer (kill-buffer input-buffer)))))))
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359
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360 (defun vm-keyboard-read-file-name (prompt &optional dir default
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361 must-match initial history)
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362 "Like read-file-name, except HISTORY's value is unaltered."
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20
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363 (let ((oldvalue (symbol-value history))
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364 ;; evade the XEmacs dialox box, yeccch.
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365 (should-use-dialog-box nil))
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0
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366 (unwind-protect
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367 (condition-case nil
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368 (read-file-name prompt dir default must-match initial history)
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369 (wrong-number-of-arguments
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370 (if history
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371 (let ((file-name-history (symbol-value history))
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372 file)
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373 (setq file
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374 (read-file-name prompt dir default must-match initial))
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375 file )
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376 (read-file-name prompt dir default must-match initial))))
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377 (and history (set history oldvalue)))))
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378
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379 (defun vm-read-file-name (prompt &optional dir default
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380 must-match initial history)
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381 "Like read-file-name, except a mouse interface is used if a mouse
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382 click mouse triggered the current command."
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383 (if (vm-mouse-support-possible-p)
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384 (cond ((and (vm-mouse-xemacs-mouse-p)
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385 (or (button-press-event-p last-command-event)
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386 (button-release-event-p last-command-event)
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387 (menu-event-p last-command-event)))
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388 (vm-mouse-read-file-name prompt dir default
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389 must-match initial history))
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390 ((and (vm-mouse-fsfemacs-mouse-p)
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391 (listp last-nonmenu-event))
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392 (vm-mouse-read-file-name prompt dir default
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393 must-match initial history))
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394 (t
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395 (vm-keyboard-read-file-name prompt dir default
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396 must-match initial history)))
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397 (vm-keyboard-read-file-name prompt dir default
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398 must-match initial history)))
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399
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400
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