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70
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1 ;; visual.el -- cursor motion, insertion, deletion, etc. in visual order
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2 ;; Copyright (C) 1992 Free Software Foundation, Inc.
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3
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4 ;; This file is part of XEmacs.
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5
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6 ;; XEmacs is free software; you can redistribute it and/or modify it
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7 ;; under the terms of the GNU General Public License as published by
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8 ;; the Free Software Foundation; either version 2, or (at your option)
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9 ;; any later version.
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10
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11 ;; XEmacs is distributed in the hope that it will be useful, but
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12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ;; General Public License for more details.
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15
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16 ;; You should have received a copy of the GNU General Public License
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17 ;; along with XEmacs; see the file COPYING. If not, write to the
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18 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 ;; Boston, MA 02111-1307, USA.
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20
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21 ;;; 94.5.15 created for Mule Ver.1.1 by Takahashi N. <ntakahas@etl.go.jp>
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22
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23 ;;;###autoload
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24 (defvar visual-mode nil "non-nil if in visual-mode.")
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25
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26 (make-variable-buffer-local 'visual-mode)
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27
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28 (defvar visual-use-lr-commands nil
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29 "If non-nil, use visual-left-* and visual-right-* commands instead of
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30 visual-forward-* and visual-backward-* commands.")
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31
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32 (defvar visual-mode-map
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33 (let ((map (make-keymap)))
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34 (substitute-key-definition 'self-insert-command
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35 'visual-self-insert-command
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36 map global-map)
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37 ; visual basic commands
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38 (define-key map [(control d)] 'visual-delete-char)
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39 (define-key map [(control k)] 'visual-kill-line)
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40 (define-key map [(control m)] 'visual-newline)
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41 (define-key map [(control o)] 'visual-open-line)
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42 (define-key map [(control p)] 'visual-previous-line)
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43 (define-key map [(control w)] 'visual-kill-region)
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44 (define-key map [(control y)] 'visual-yank)
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45 (define-key map [delete] 'visual-backward-delete-char)
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46 (define-key map [(meta <)] 'visual-beginning-of-buffer)
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47 (define-key map [(meta >)] 'visual-end-of-buffer)
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48 (define-key map [(meta d)] 'visual-kill-word)
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49 (define-key map [(meta w)] 'visual-kill-ring-save)
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50 (define-key map [(meta y)] 'visual-yank-pop)
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51 (define-key map [(meta delete)] 'visual-backward-kill-word)
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52 (define-key map [up] 'visual-previous-line)
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53 (define-key map [down] 'visual-next-line)
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54 (define-key map [home] 'visual-beginning-of-buffer)
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55 (define-key map [end] 'visual-end-of-buffer)
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56 (define-key map [left] 'visual-move-to-left-char)
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57 (define-key map [right] 'visual-move-to-right-char)
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58 (define-key map [(meta left)] 'visual-move-to-left-word)
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59 (define-key map [(meta right)] 'visual-move-to-right-word)
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60 (define-key map [(control c) (control c)] 'exit-visual-mode)
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61 (define-key map [(control c) <] 'l2r-mode)
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62 (define-key map [(control c) >] 'r2l-mode)
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63 ; LR commands
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64 (if visual-use-lr-commands
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65 (progn
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66 (define-key map [(control a)] 'visual-left-end-of-line)
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67 (define-key map [(control b)] 'visual-move-to-left-char)
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68 (define-key map [(control e)] 'visual-right-end-of-line)
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69 (define-key map [(control f)] 'visual-move-to-right-char)
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70 (define-key map [(meta b)] 'visual-move-to-left-word)
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71 (define-key map [(meta f)] 'visual-move-to-right-word))
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72 (define-key map [(control a)] 'visual-beginning-of-line)
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73 (define-key map [(control b)] 'visual-backward-char)
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74 (define-key map [(control e)] 'visual-end-of-line)
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75 (define-key map [(control f)] 'visual-forward-char)
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76 (define-key map [(meta b)] 'visual-backward-word)
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77 (define-key map [(meta f)] 'visual-forward-word))
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78 map)
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79 "minor-mode-keymap for visual-mode.")
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80
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81 (if (not (assq 'visual-mode minor-mode-map-alist))
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82 (setq minor-mode-map-alist
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83 (cons (cons 'visual-mode visual-mode-map)
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84 minor-mode-map-alist)))
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85
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86 (defvar visual-mode-indicator nil
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87 "string displayed in mode line. \" l2r\" or \" r2l\".")
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88 (make-variable-buffer-local 'visual-mode-indicator)
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89
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90 (if (not (assq 'visual-mode minor-mode-alist))
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91 (setq minor-mode-alist
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92 (cons '(visual-mode visual-mode-indicator)
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93 minor-mode-alist)))
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94
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95 (setq auto-mode-alist
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96 (append '(("\\.l2r$" . l2r-mode) ("\\.r2l$" . r2l-mode))
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97 auto-mode-alist))
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98
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99 (defvar visual-mode-hooks nil)
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100
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101 ;;;###autoload
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102 (defun visual-mode (&optional arg)
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103 "Toggle visual-mode. With ARG, turn visual-mode on iff ARG is positive."
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104 (interactive "P")
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105 (if (null arg)
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106 (if visual-mode (exit-visual-mode) (enter-visual-mode))
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107 (if (> (prefix-numeric-value arg) 0)
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108 (enter-visual-mode)
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109 (exit-visual-mode))))
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110
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111 (defun enter-visual-mode nil
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112 "Enter visual-mode. Cursor moves in visual order."
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113 (interactive)
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114 (if (not visual-mode)
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115 (progn
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116 (setq visual-mode t
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117 visual-mode-indicator (if display-direction " r2l" " l2r"))
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118 (redraw-display)
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119 (run-hooks 'visual-mode-hooks))))
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120
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121 (defun exit-visual-mode nil
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122 "Exit visual-mode. Cursor moves in logical order."
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123 (interactive)
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124 (if visual-mode
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125 (progn
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126 (setq visual-mode nil)
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127 (redraw-modeline t))))
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128
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129 (defun l2r-mode nil
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130 "Set display-direction left to right."
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131 (interactive)
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132 (if (not visual-mode)
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133 (enter-visual-mode))
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134 (setq display-direction nil)
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135 (setq visual-mode-indicator " l2r")
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136 (redraw-display))
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137
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138 (defun r2l-mode nil
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139 "Set display-direction right to left."
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140 (interactive)
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141 (if (not visual-mode)
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142 (enter-visual-mode))
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143 (setq display-direction t)
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144 (setq visual-mode-indicator " r2l")
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145 (redraw-display))
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146
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147
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148 ;; cursor motion
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149
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150 (defun visual-forward-char (arg)
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151 "Move the cursor visually forward by ARG (integer) characters.
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152 if ARG is negative, move backward."
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153 (interactive "p")
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154 (if (< arg 0)
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155 (while (< arg 0)
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156 (visual-backward-1-char)
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157 (setq arg (1+ arg)))
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158 (while (> arg 0)
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159 (visual-forward-1-char)
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160 (setq arg (1- arg)))))
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161
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162 (defun visual-forward-1-char nil
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163 "Move the cursor visually forward by 1 character."
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164 (let ((r-dir (if display-direction 0 1))
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165 (a-dir (visual-char-direction-after-point))
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166 (aa-dir (visual-char-direction-after-after-point))
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167 (b-dir (visual-char-direction-before-point)))
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168
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169 ; symbols used in the following comments
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170 ; ^ : point in here
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171 ; ~ : point will be there
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172 ; d : character whose direction is the same as display-direction
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173 ; r : character whose direction is opposite to display-direction
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174 ; !d : r or nil
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175 ; !r : d or nil
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176 ; r* : 0 or more r's
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177 ; d* : 0 or more d's
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178
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179 (cond
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180 ((null a-dir)
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181 ; ... nil
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182 ; ^
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183 (error "end of buffer"))
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184
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185 ((eq a-dir r-dir)
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186 (if (eq b-dir r-dir)
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187
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188 ; ... r r ...
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189 ; ~ ^
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190 (backward-char 1)
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191
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192 ; ... !r r r* ...
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193 ; ^ ~
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194 (skip-direction-forward r-dir)))
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195
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196 ((eq aa-dir r-dir)
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197 ; ... d r* r ...
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198 ; ^ ~
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199 (forward-char 1)
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200 (skip-direction-forward r-dir)
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201 (backward-char 1))
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202
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203 (t
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204 ; ... d !r ...
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205 ; ^ ~
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206 (forward-char 1)))))
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207
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208 (defun visual-backward-char (arg)
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209 "Move the cursor visually backward by ARG (integer) characters.
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210 if ARG is negative, move forward."
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211 (interactive "p")
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212 (if (< arg 0)
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213 (while (< arg 0)
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214 (visual-forward-1-char)
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215 (setq arg (1+ arg)))
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216 (while (> arg 0)
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217 (visual-backward-1-char)
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218 (setq arg (1- arg)))))
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219
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220 (defun visual-backward-1-char nil
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221 "Move the cursor visually backward by 1 character."
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222 (let ((r-dir (if display-direction 0 1))
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223 (a-dir (visual-char-direction-after-point))
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224 (aa-dir (visual-char-direction-after-after-point))
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225 (b-dir (visual-char-direction-before-point)))
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226
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227 ; symbols used in the following comments
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228 ; ^ : point in here
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229 ; ~ : point will be there
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230 ; d : character whose direction is the same as display-direction
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231 ; r : character whose direction is opposite to display-direction
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232 ; !d : r or nil
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233 ; !r : d or nil
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234 ; r* : 0 or more r's
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235 ; d* : 0 or more d's
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236
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237 (cond
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238 ((eq a-dir r-dir)
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239 (if (eq aa-dir r-dir)
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240 ; ... r r ...
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241 ; ^ ~
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242 (forward-char 1)
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243
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244 ; ... !r r* !r ...
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245 ; ~ ^
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246 (skip-direction-backward r-dir)
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247 (if (visual-char-direction-before-point)
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248 (backward-char 1)
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249 (skip-direction-forward r-dir)
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250 (backward-char 1)
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251 (error "beginning of buffer"))))
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252
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253 ((null b-dir)
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254 ; nil !r ...
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255 ; ^
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256 (error "beginning of buffer"))
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257
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258 ((eq b-dir r-dir)
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259 ; ... r* r !r
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260 ; ~ ^
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261 (skip-direction-backward r-dir))
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262
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263 (t
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264 ; ... d !r ...
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265 ; ~ ^
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266 (backward-char 1)))))
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267
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268 (defun visual-char-direction (ch)
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269 "Return the direction of CH (character).
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270 Newline's direction will be same as display-direction."
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271 (cond
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272 ((null ch) nil)
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273 ((= ch ?\n) (if display-direction 1 0))
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274 (t (char-direction ch))))
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275
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276 (defun visual-char-direction-after-point nil
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277 "Return the direction of after-point-character.
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278 0: left-to-right, 1: right-to-left"
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279 (visual-char-direction (char-after (point))))
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280
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281 (defun visual-char-direction-after-after-point nil
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282 "Return the direction of after-after-point-character.
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283 0: left-to-right, 1: right-to-left"
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284 (if (= (point) (point-max))
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285 nil
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286 (save-excursion
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287 (forward-char 1)
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288 (visual-char-direction (char-after (point))))))
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289
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290 (defun visual-char-direction-before-point nil
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291 "Return the direction of before-point-character.
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292 0: left-to-right, 1: right-to-left"
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293 (visual-char-direction (char-before (point))))
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294
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295 (defun skip-direction-forward (dir)
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296 "Move point forward as long as DIR-direction characters continue."
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297 (while (eq (visual-char-direction-after-point) dir)
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298 (forward-char 1)))
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299
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300 (defun skip-direction-backward (dir)
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301 "Move point backward as long as DIR-direction characters continue."
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302 (while (eq (visual-char-direction-before-point) dir)
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303 (backward-char 1)))
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304
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305 (defvar *visual-punctuations*
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306 '(? ?. ?, ?: ?; ?? ?! ?- ?_ ?' ?\" ?/ ?( ?) ?[ ?] ?{ ?} ?\n ?\t ; ASCII
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307 ? ?. ?, ?: ?; ?? ?! ?- ?_ ?' ?" ?( ?) ?[ ?] ; Hebrew
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308 ?[2](3[0](B ?[2](3"[0](B ?[2](3'[0](B ?[2](3([0](B ?[2](3#[0](B ?[2](3$[0](B ?[2](3*[0](B ?[2](3+[0](B )) ; Arabic
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309
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310 (defun visual-forward-word (arg)
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311 "Move the cursor visually forward by ARG (integer) words.
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312 If ARG is negative, move the cursor backward."
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313 (interactive "p")
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314 (if (< arg 0)
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315 (while (< arg 0)
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316 (visual-backward-1-word)
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317 (setq arg (1+ arg)))
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318 (while (> arg 0)
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319 (visual-forward-1-word)
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320 (setq arg (1- arg)))))
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321
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322 (defun visual-backward-word (arg)
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323 "Move the cursor visually backward by ARG (integer) words.
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324 If ARG is negative, move the cursor forward."
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325 (interactive "p")
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326 (if (< arg 0)
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327 (while (< arg 0)
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328 (visual-forward-1-word)
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329 (setq arg (1+ arg)))
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330 (while (> arg 0)
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331 (visual-backward-1-word)
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332 (setq arg (1- arg)))))
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333
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334 (defun visual-forward-1-word nil
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335 "Move the cursor visually forward by one word."
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336 (while (memq (visual-char-after) *visual-punctuations*)
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337 (visual-forward-1-char))
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338 (while (not (memq (visual-char-after) *visual-punctuations*))
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339 (visual-forward-1-char)))
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340
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341 (defun visual-backward-1-word nil
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342 "Move the cursor visually backward by one word."
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343 (while (memq (visual-char-before) *visual-punctuations*)
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344 (visual-backward-1-char))
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345 (while (not (memq (visual-char-before) *visual-punctuations*))
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346 (visual-backward-1-char)))
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347
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348 (defun visual-char-before nil
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349 "Return the character visually before the cursor.
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350 If such position is out of range, returns nil."
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351 ; almost same as visual-backward-1-char
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352 (save-excursion
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353 (let ((r-dir (if display-direction 0 1))
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354 (a-dir (visual-char-direction-after-point))
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355 (aa-dir (visual-char-direction-after-after-point))
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356 (b-dir (visual-char-direction-before-point)))
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357 (cond
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358 ((eq a-dir r-dir)
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359 (if (eq aa-dir r-dir)
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360 (progn
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361 (forward-char 1)
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362 (char-after (point)))
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363 (skip-direction-backward r-dir)
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364 (if (visual-char-direction-before-point)
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365 (progn
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366 (backward-char 1)
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367 (char-after (point)))
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368 nil)))
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369 ((null b-dir)
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370 nil)
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371 ((eq b-dir r-dir)
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372 (skip-direction-backward r-dir)
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373 (char-after (point)))
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374 (t
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375 (backward-char 1)
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376 (char-after (point)))))))
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377
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378 (defun visual-char-after nil
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379 "Return the character under the cursor.
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380 If such position is out of range, returns nil."
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381 (char-after (point)))
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382
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383 (defun visual-beginning-of-line (&optional arg)
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384 "Move the cursor to the visual beginning of line.
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385 With ARG not nil, move forward ARG - 1 lines first.
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386 If scan reaches end of buffer, stop there without error."
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387 (interactive "P")
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388 (beginning-of-line arg)
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389 (let ((a-dir (visual-char-direction-after-point))
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390 (d-dir (if display-direction 1 0)))
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391 (if (and a-dir (/= a-dir d-dir))
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392 (progn (skip-direction-forward a-dir)
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393 (backward-char 1)))))
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394
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395 (fset 'visual-end-of-line 'end-of-line)
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396
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397 (defun visual-beginning-of-buffer nil
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398 "Move the cursor to the visual beginning of current buffer."
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399 (interactive)
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400 (beginning-of-buffer)
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401 (visual-beginning-of-line))
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402
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403 (fset 'visual-end-of-buffer 'end-of-buffer)
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404
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405 (defvar visual-temporary-goal-column 0
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406 "temporary-goal-column command for visual-mode.")
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407
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408 (defun visual-next-line (arg)
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409 "next-line command for visual-mode."
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410 (interactive "p")
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411 (if (and (not (eq last-command 'visual-next-line))
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412 (not (eq last-command 'visual-previous-line)))
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413 (setq visual-temporary-goal-column (visual-current-column)))
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414 (next-line arg)
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415 (visual-goto-column visual-temporary-goal-column))
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416
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417 (defun visual-previous-line (arg)
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418 "previous-line command for visual-mode."
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419 (interactive "p")
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420 (if (and (not (eq last-command 'visual-next-line))
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421 (not (eq last-command 'visual-previous-line)))
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422 (setq visual-temporary-goal-column (visual-current-column)))
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423 (previous-line arg)
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424 (visual-goto-column visual-temporary-goal-column))
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425
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426 (defun visual-current-column nil
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427 "Return the current column counted in visual order."
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428 (let ((c 0) (p (point)))
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429 (visual-beginning-of-line)
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430 (while (/= (point) p)
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431 (setq c (+ c (char-width (visual-char-after))))
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432 (visual-forward-1-char))
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433 c))
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434
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435 (defun visual-goto-column (col)
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436 "Move the cursor to visual column N (integer) in the current line.
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437 If it is impossible to go to column N, the cursor is put on the nearest column
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438 M (M < N). Returns N - M."
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439 (if (< col 0)
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440 (error "argument must be positive."))
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441 (let ((c 0))
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442 (visual-beginning-of-line)
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443 (while (and (< c col) (not (eolp)))
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444 (setq c (+ c (char-width (visual-char-after))))
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445 (visual-forward-1-char))
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446 (if (> c col)
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447 (progn
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448 (visual-backward-1-char)
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449 (setq c (- c (char-width (visual-char-after))))))
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450 (- col c)))
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451
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452
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453 ;; insertion
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454
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455 (defun visual-insert-char (ch arg)
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456 "Insert character CH visually before the cursor.
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457 With ARG (integer) insert that many characters."
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458 (if (< arg 0)
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459 (error "arg must be >= 0."))
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460 (while (> arg 0)
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461 (visual-insert-1-char ch)
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462 (setq arg (1- arg))))
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463
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464 (defun visual-insert-1-char (ch)
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465 "Insert character CH visually before the cursor.
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466 The cursor moves visually forward."
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467 (let ((c-dir (visual-char-direction ch))
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468 (r-dir (if display-direction 0 1))
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469 (a-dir (visual-char-direction-after-point))
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470 (tmp))
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471
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472 ; symbols used in the following comments
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473 ; d : character whose direction is the same as display-direction
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474 ; r : character whose direction is opposite to display-direction
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475 ; !d : r or nil
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476 ; !r : d or nil
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477 ; ^d : point is here and the character to be inserted is d
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478 ; ^r : point is here and the character to be inserted is d
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479
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480 (if (eq c-dir r-dir)
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481 (if (eq a-dir r-dir)
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482
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483 ; ... r ...
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484 ; ^r
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485 (progn
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486 (forward-char 1)
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487 (insert ch)
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488 (backward-char 2))
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489
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490 ; ... !r ...
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491 ; ^r
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492 (skip-direction-backward c-dir)
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493 (insert ch)
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494 (skip-direction-forward c-dir))
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495
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496 (if (or (eq a-dir nil)
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497 (eq a-dir c-dir))
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498
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499 ; ... !r ...
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500 ; ^d
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501 (insert ch)
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502
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503 ; ... r ...
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504 ; ^d
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505 (forward-char 1)
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506 (setq tmp (delete-direction-backward r-dir))
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507 (skip-direction-forward r-dir)
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508 (insert ch tmp)
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509 (backward-char 1)))))
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510
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511 (defun delete-direction-forward (dir)
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512 "From current point, delete DIR-direction charaters forward.
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513 Returns the deleted string."
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514 (let ((p (point)))
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515 (skip-direction-forward dir)
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516 (prog1
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517 (buffer-substring (point) p)
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518 (delete-region (point) p))))
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519
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520 (defun delete-direction-backward (dir)
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521 "From current point, delete DIR-direction characters backward.
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522 Return the deleted string."
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523 (let ((p (point)))
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524 (skip-direction-backward dir)
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525 (prog1
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526 (buffer-substring (point) p)
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527 (delete-region (point) p))))
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528
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529 (defun visual-self-insert-command (arg)
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530 "Insert this character (32 <= CH < 127).
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531 With ARG (integer), insert that many characters.
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532 If display-direction is non-nil, the cursor stays at the same position."
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533 (interactive "*p")
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534 (visual-insert-char last-command-char arg)
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535 (if display-direction
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536 (visual-backward-char arg)))
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537
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|
538 (defun visual-newline (arg)
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|
539 "newline command for visual-mode.
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540 With ARG (integer), insert that many newlines."
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541 (interactive "*p")
|
|
|
542 (visual-insert-char ?\n arg))
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543
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544 (defun visual-open-line (arg)
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545 "open-line command for visual-mode.
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546 With arg (integer), insert that many newlines."
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547 (interactive "*p")
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548 (visual-insert-char ?\n arg)
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|
549 (visual-backward-char arg))
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550
|
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551
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|
552 ;; deletion
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553
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554 (defun visual-delete-char (arg)
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555 "Delete ARG (integer) characters visually forward.
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556 If ARG is negative, delete backward."
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557 (interactive "*p")
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558 (if (< arg 0)
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559 (while (< arg 0)
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560 (visual-backward-delete-1-char)
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|
561 (setq arg (1+ arg)))
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562 (while (> arg 0)
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563 (visual-delete-1-char)
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564 (setq arg (1- arg)))))
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565
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|
566 (defun visual-backward-delete-char (arg)
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|
567 "Delete ARG (integer) characters visually backward.
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|
568 If arg is negative, delete forward."
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|
569 (interactive "*p")
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570 (if (< arg 0)
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571 (while (< arg 0)
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572 (visual-delete-1-char)
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|
573 (setq arg (1+ arg)))
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|
574 (while (> arg 0)
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575 (visual-backward-delete-1-char)
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|
576 (setq arg (1- arg)))))
|
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|
577
|
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|
578 (fset 'visual-delete-backward-char 'visual-backward-delete-char)
|
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|
579
|
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|
580 (defun visual-backward-delete-1-char nil
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|
|
581 "Delete a character visually before the cursor.
|
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|
582 Ther cursor moves visually backward."
|
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|
583 (let ((d-dir (if display-direction 1 0))
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|
584 (r-dir (if display-direction 0 1))
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585 (a-dir (visual-char-direction-after-point))
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|
586 (aa-dir (visual-char-direction-after-after-point))
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|
587 (b-dir (visual-char-direction-before-point))
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|
588 (tmp))
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|
589
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|
590 ; symbols used in the following comments
|
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|
591 ; ^ : point in here
|
|
|
592 ; d : character whose direction is the same as display-direction
|
|
|
593 ; r : character whose direction is opposite to display-direction
|
|
|
594 ; !d : r or nil
|
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|
595 ; !r : d or nil
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|
596 ; r* : 0 or more r's
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|
597 ; d* : 0 or more d's
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|
598
|
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|
599 (if (eq a-dir r-dir)
|
|
|
600 (cond
|
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|
601 ((eq aa-dir r-dir)
|
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|
602 ; ... r r ...
|
|
|
603 ; ^
|
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|
604 (forward-char 1)
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|
605 (delete-char 1)
|
|
|
606 (backward-char 1))
|
|
|
607
|
|
|
608 ((save-excursion
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|
609 (skip-direction-backward r-dir)
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|
610 (backward-char 1)
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|
611 (and (eq (visual-char-direction-after-point) d-dir)
|
|
|
612 (eq (visual-char-direction-before-point) r-dir)))
|
|
|
613 ; ... r d r* r !r ...
|
|
|
614 ; ^
|
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|
615 (forward-char 1)
|
|
|
616 (setq tmp (delete-direction-backward r-dir))
|
|
|
617 (delete-backward-char 1)
|
|
|
618 (skip-direction-backward r-dir)
|
|
|
619 (insert tmp)
|
|
|
620 (backward-char 1))
|
|
|
621
|
|
|
622 (t
|
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|
623 ; .....!r d r* r !r ...
|
|
|
624 ; ^
|
|
|
625 (skip-direction-backward r-dir)
|
|
|
626 (delete-backward-char 1)
|
|
|
627 (skip-direction-forward r-dir)
|
|
|
628 (backward-char 1)))
|
|
|
629
|
|
|
630 (cond
|
|
|
631 ((null b-dir)
|
|
|
632 ; nil !r ...
|
|
|
633 ; ^
|
|
|
634 (error "beginning of buffer"))
|
|
|
635
|
|
|
636 ((eq b-dir r-dir)
|
|
|
637 ; ... r !r ...
|
|
|
638 ; ^
|
|
|
639 (skip-direction-backward r-dir)
|
|
|
640 (delete-char 1)
|
|
|
641 (skip-direction-forward r-dir))
|
|
|
642
|
|
|
643 (t
|
|
|
644 ; ... !r !r ...
|
|
|
645 ; ^
|
|
|
646 (delete-backward-char 1))))))
|
|
|
647
|
|
|
648 (fset 'visual-delete-backward-1-char 'visual-backward-delete-1-char)
|
|
|
649
|
|
|
650 (defun visual-delete-1-char nil
|
|
|
651 "Delete a character under the cursor.
|
|
|
652 Visually, the cursor stays at the same position."
|
|
|
653 (let ((d-dir (if display-direction 1 0))
|
|
|
654 (r-dir (if display-direction 0 1))
|
|
|
655 (a-dir (visual-char-direction-after-point))
|
|
|
656 (aa-dir (visual-char-direction-after-after-point))
|
|
|
657 (b-dir (visual-char-direction-before-point))
|
|
|
658 (tmp))
|
|
|
659
|
|
|
660 ; symbols used in the following comments
|
|
|
661 ; ^ : point in here
|
|
|
662 ; d : character whose direction is the same as display-direction
|
|
|
663 ; r : character whose direction is opposite to display-direction
|
|
|
664 ; !d : r or nil
|
|
|
665 ; !r : d or nil
|
|
|
666 ; r* : 0 or more r's
|
|
|
667 ; d* : 0 or more d's
|
|
|
668
|
|
|
669 (cond
|
|
|
670 ((null a-dir)
|
|
|
671 ; ... nil
|
|
|
672 ; ^
|
|
|
673 (error "end of buffer"))
|
|
|
674
|
|
|
675 ((eq a-dir r-dir)
|
|
|
676 (if (eq b-dir r-dir)
|
|
|
677
|
|
|
678 ; ... r r ...
|
|
|
679 ; ^
|
|
|
680 (progn (delete-char 1)
|
|
|
681 (backward-char 1))
|
|
|
682
|
|
|
683 ; ... !r r ...
|
|
|
684 ; ^
|
|
|
685 (delete-char 1)
|
|
|
686 (skip-direction-forward r-dir)))
|
|
|
687
|
|
|
688 ((not (eq aa-dir r-dir))
|
|
|
689 ; ... d !r ...
|
|
|
690 ; ^
|
|
|
691 (delete-char 1))
|
|
|
692
|
|
|
693 ((eq b-dir r-dir)
|
|
|
694 ; ... r d r ...
|
|
|
695 ; ^
|
|
|
696 (delete-char 1)
|
|
|
697 (setq tmp (delete-direction-forward r-dir))
|
|
|
698 (skip-direction-backward r-dir)
|
|
|
699 (insert tmp)
|
|
|
700 (backward-char 1))
|
|
|
701
|
|
|
702 (t
|
|
|
703 ; ...!r d r ...
|
|
|
704 ; ^
|
|
|
705 (delete-char 1)
|
|
|
706 (skip-direction-forward r-dir)
|
|
|
707 (backward-char 1)))))
|
|
|
708
|
|
|
709 (defun visual-delete-region (beg end)
|
|
|
710 "delete-region command for visual-mode."
|
|
|
711 (interactive "*r")
|
|
|
712 (let ((begl) (begc) (endl) (endc) (l))
|
|
|
713
|
|
|
714 ; swap beg & end if necessary
|
|
|
715 (goto-char beg)
|
|
|
716 (setq begl (current-line)
|
|
|
717 begc (visual-current-column))
|
|
|
718 (goto-char end)
|
|
|
719 (setq endl (current-line)
|
|
|
720 endc (visual-current-column))
|
|
|
721 (if (or (> begl endl)
|
|
|
722 (and (= begl endl)
|
|
|
723 (> begc endc)))
|
|
|
724 (progn
|
|
|
725 (setq beg (prog1 end (setq end beg))
|
|
|
726 begl (prog1 endl (setq endl begl))
|
|
|
727 begc (prog1 endc (setq endc begc)))
|
|
|
728 (goto-char end)))
|
|
|
729
|
|
|
730 ; insert a newline visually at END
|
|
|
731 (visual-insert-1-char ?\n)
|
|
|
732 (visual-backward-1-char)
|
|
|
733 (setq l (current-line))
|
|
|
734
|
|
|
735 ; insert a newline visually at BEG
|
|
|
736 (goto-line begl)
|
|
|
737 (visual-goto-column begc)
|
|
|
738 (visual-insert-1-char ?\n)
|
|
|
739 (beginning-of-line)
|
|
|
740
|
|
|
741 (delete-region
|
|
|
742 (point)
|
|
|
743 (progn
|
|
|
744 (goto-line (1+ l))
|
|
|
745 (end-of-line)
|
|
|
746 (point)))
|
|
|
747 (backward-char 1)
|
|
|
748 (visual-delete-char 2)))
|
|
|
749
|
|
|
750 (defun current-line nil
|
|
|
751 "Return the current line number (in the buffer) of point."
|
|
|
752 (interactive)
|
|
|
753 (save-excursion
|
|
|
754 (beginning-of-line)
|
|
|
755 (1+ (count-lines 1 (point)))))
|
|
|
756
|
|
|
757
|
|
|
758 ;; kill
|
|
|
759
|
|
|
760 (defun visual-kill-region (beg end)
|
|
|
761 "kill-region command for visual-mode."
|
|
|
762 (interactive "r")
|
|
|
763 (let ((begl) (begc) (endl) (endc) (l))
|
|
|
764
|
|
|
765 ; swap beg & end if necessary
|
|
|
766 (goto-char beg)
|
|
|
767 (setq begl (current-line)
|
|
|
768 begc (visual-current-column))
|
|
|
769 (goto-char end)
|
|
|
770 (setq endl (current-line)
|
|
|
771 endc (visual-current-column))
|
|
|
772 (if (or (> begl endl)
|
|
|
773 (and (= begl endl) (> begc endc)))
|
|
|
774 (progn
|
|
|
775 (setq beg (prog1 end (setq end beg))
|
|
|
776 begl (prog1 endl (setq endl begl))
|
|
|
777 begc (prog1 endc (setq endc begc)))
|
|
|
778 (goto-char end)))
|
|
|
779
|
|
|
780 (if (or (and buffer-read-only (not inhibit-read-only))
|
|
|
781 (text-property-not-all beg end 'read-only nil))
|
|
|
782 (progn
|
|
|
783 (visual-copy-region-as-kill beg end)
|
|
|
784 (if kill-read-only-ok
|
|
|
785 (message "Read only text copied to kill ring")
|
|
|
786 (barf-if-buffer-read-only)))
|
|
|
787
|
|
|
788 ; insert a newline visually at END
|
|
|
789 (visual-insert-1-char ?\n)
|
|
|
790 (visual-backward-1-char)
|
|
|
791 (setq l (current-line))
|
|
|
792
|
|
|
793 ; insert a newline visually at BEG
|
|
|
794 (goto-line begl)
|
|
|
795 (visual-goto-column begc)
|
|
|
796 (visual-insert-1-char ?\n)
|
|
|
797 (beginning-of-line)
|
|
|
798
|
|
|
799 (kill-region
|
|
|
800 (point)
|
|
|
801 (progn
|
|
|
802 (goto-line (1+ l))
|
|
|
803 (end-of-line)
|
|
|
804 (point)))
|
|
|
805 (backward-char 1)
|
|
|
806 (visual-delete-char 2)))
|
|
|
807
|
|
|
808 (setq this-command 'kill-region))
|
|
|
809
|
|
|
810 (defun visual-kill-word (arg)
|
|
|
811 "Kill ARG (integer) words visually forward.
|
|
|
812 If ARG is negative, kill backward."
|
|
|
813 (interactive "*p")
|
|
|
814 (visual-kill-region
|
|
|
815 (point)
|
|
|
816 (progn
|
|
|
817 (visual-forward-word arg)
|
|
|
818 (point))))
|
|
|
819
|
|
|
820 (defun visual-backward-kill-word (arg)
|
|
|
821 "Kill ARG (integer) words visually backward.
|
|
|
822 If ARG is negative, kill forward."
|
|
|
823 (interactive "*p")
|
|
|
824 (visual-kill-region
|
|
|
825 (point)
|
|
|
826 (progn
|
|
|
827 (visual-backward-word arg)
|
|
|
828 (point))))
|
|
|
829
|
|
|
830 (defun visual-kill-line (&optional arg)
|
|
|
831 "kill-line command for visual-mode."
|
|
|
832 (interactive "*P")
|
|
|
833 (visual-kill-region
|
|
|
834 (point)
|
|
|
835 (progn
|
|
|
836 (if arg
|
|
|
837 (progn
|
|
|
838 (forward-line (prefix-numeric-value arg))
|
|
|
839 (visual-beginning-of-line))
|
|
|
840 (if (eobp)
|
|
|
841 (signal 'end-of-buffer nil))
|
|
|
842 (if (not (eolp))
|
|
|
843 (visual-end-of-line)
|
|
|
844 (forward-line 1)
|
|
|
845 (visual-beginning-of-line)))
|
|
|
846 (point))))
|
|
|
847
|
|
|
848 (defun visual-copy-region-as-kill (beg end)
|
|
|
849 "copy-region-as-kill command for visual-mode."
|
|
|
850 (interactive "r")
|
|
|
851 (let ((buffer-read-only nil)
|
|
|
852 (auto-save-mode 0)
|
|
|
853 (p (point)))
|
|
|
854 (visual-kill-region beg end)
|
|
|
855 (visual-yank 1)
|
|
|
856 (if (/= (point) p)
|
|
|
857 (exchange-point-and-mark)))
|
|
|
858 nil)
|
|
|
859
|
|
|
860 (defun visual-kill-ring-save (beg end)
|
|
|
861 "kill-ring-save command for visual-mode."
|
|
|
862 (interactive "r")
|
|
|
863 (visual-copy-region-as-kill beg end)
|
|
|
864 (if (interactive-p)
|
|
|
865 (let ((other-end (if (= (point) beg) end beg))
|
|
|
866 (opoint (point))
|
|
|
867 (inhibit-quit t))
|
|
|
868 (if (pos-visible-in-window-p other-end (selected-window))
|
|
|
869 (progn
|
|
|
870 (set-marker (mark-marker) (point) (current-buffer))
|
|
|
871 (goto-char other-end)
|
|
|
872 (sit-for 1)
|
|
|
873 (set-marker (mark-marker) other-end (current-buffer))
|
|
|
874 (goto-char opoint)
|
|
|
875 (and quit-flag mark-active
|
|
|
876 (deactivate-mark)))
|
|
|
877 (let* ((killed-text (current-kill 0))
|
|
|
878 (message-len (min (length killed-text) 40)))
|
|
|
879 (if (= (point) beg)
|
|
|
880 (message "Saved text until \"%s\""
|
|
|
881 (substring killed-text (- message-len)))
|
|
|
882 (message "Saved text from \"%s\""
|
|
|
883 (substring killed-text 0 message-len))))))))
|
|
|
884
|
|
|
885
|
|
|
886 ;; yank
|
|
|
887
|
|
|
888 (defun visual-yank (&optional arg)
|
|
|
889 "yank command for visual-mode."
|
|
|
890 (interactive "*P")
|
|
|
891 (setq this-command t)
|
|
|
892
|
|
|
893 (let ((l1 (current-line)) (c1 (visual-current-column)) l2 c2)
|
|
|
894
|
|
|
895 ;; Insert a newline both before and after current point.
|
|
|
896 (visual-insert-char ?\n 2)
|
|
|
897 (visual-backward-1-char)
|
|
|
898
|
|
|
899 ;; Reinsert killed string between the two newlines.
|
|
|
900 (insert (current-kill (cond
|
|
|
901 ((listp arg) 0)
|
|
|
902 ((eq arg '-) -1)
|
|
|
903 (t (1- arg)))))
|
|
|
904
|
|
|
905 ;; Delete the latter newline visually.
|
|
|
906 (visual-delete-1-char)
|
|
|
907 (setq l2 (current-line)
|
|
|
908 c2 (visual-current-column))
|
|
|
909
|
|
|
910 ;; Delete the former newline visually.
|
|
|
911 (goto-line l1)
|
|
|
912 (end-of-line)
|
|
|
913 (visual-delete-1-char)
|
|
|
914 (push-mark (point))
|
|
|
915
|
|
|
916 ;; Go back to the end of yanked string.
|
|
|
917 (if (= (- l2 l1) 1)
|
|
|
918 (visual-goto-column (+ c1 c2))
|
|
|
919 (goto-line (1- l2))
|
|
|
920 (visual-goto-column c2))
|
|
|
921
|
|
|
922 ;; Exchange point and mark if necessary.
|
|
|
923 (if (consp arg)
|
|
|
924 (goto-char (prog1 (mark t)
|
|
|
925 (set-marker (mark-marker) (point) (current-buffer))))))
|
|
|
926
|
|
|
927 (setq this-command 'yank)
|
|
|
928 nil)
|
|
|
929
|
|
|
930 (defun visual-yank-pop (arg)
|
|
|
931 "yank-pop command for visual-mode."
|
|
|
932 (interactive "*p")
|
|
|
933 (if (not (eq last-command 'yank))
|
|
|
934 (error "Previous command was not a yank"))
|
|
|
935 (setq this-command 'yank)
|
|
|
936 (let (l1 c1 l2 c2 before)
|
|
|
937
|
|
|
938 (save-excursion
|
|
|
939 (setq l2 (current-line)
|
|
|
940 c2 (visual-current-column))
|
|
|
941 (goto-char (mark t))
|
|
|
942 (setq l1 (current-line)
|
|
|
943 c1 (visual-current-column))
|
|
|
944 (if (or (> l1 l2)
|
|
|
945 (and (= l1 l2) (> c1 c2)))
|
|
|
946 (setq before t)))
|
|
|
947
|
|
|
948 (visual-delete-region (point) (mark t))
|
|
|
949 (setq l1 (current-line)
|
|
|
950 c1 (visual-current-column))
|
|
|
951
|
|
|
952 ;; Insert a newline both before and after current point.
|
|
|
953 (visual-insert-char ?\n 2)
|
|
|
954 (visual-backward-1-char)
|
|
|
955
|
|
|
956 ;; Reinsert killed string between the two newlines.
|
|
|
957 (insert (current-kill arg))
|
|
|
958
|
|
|
959 ;; Delete the latter newline visually.
|
|
|
960 (visual-delete-1-char)
|
|
|
961 (setq l2 (current-line)
|
|
|
962 c2 (visual-current-column))
|
|
|
963
|
|
|
964 ;; Delete the former newline visually.
|
|
|
965 (goto-line l1)
|
|
|
966 (end-of-line)
|
|
|
967 (visual-delete-1-char)
|
|
|
968 (set-marker (mark-marker) (point) (current-buffer))
|
|
|
969
|
|
|
970 ;; Go back to the end of yanked string.
|
|
|
971 (if (= (- l2 l1) 1)
|
|
|
972 (visual-goto-column (+ c1 c2))
|
|
|
973 (goto-line (1- l2))
|
|
|
974 (visual-goto-column c2))
|
|
|
975
|
|
|
976 ;; Exchange point and mark if necessary.
|
|
|
977 (if before
|
|
|
978 (goto-char (prog1 (mark t)
|
|
|
979 (set-marker (mark-marker) (point) (current-buffer))))))
|
|
|
980
|
|
|
981 nil)
|
|
|
982
|
|
|
983
|
|
|
984 ;; misc
|
|
|
985
|
|
|
986 (defun visual-reverse-direction-word nil
|
|
|
987 "Reverse the char order of the word before point."
|
|
|
988 (interactive "*")
|
|
|
989 (goto-char
|
|
|
990 (prog1
|
|
|
991 (point)
|
|
|
992 (reverse-region
|
|
|
993 (point)
|
|
|
994 (progn (skip-direction-backward (visual-char-direction-before-point))
|
|
|
995 (point))))))
|
|
|
996
|
|
|
997 (defun visual-reverse-region (begin end)
|
|
|
998 "Reverse the order of chars between BEGIN and END."
|
|
|
999 (interactive "*r")
|
|
|
1000 (apply 'insert
|
|
|
1001 (nreverse
|
|
|
1002 (string-to-char-list
|
|
|
1003 (prog1 (buffer-substring begin end) (delete-region begin end))))))
|
|
|
1004
|
|
|
1005
|
|
|
1006 ;; LR commands
|
|
|
1007
|
|
|
1008 (defun visual-char-left nil
|
|
|
1009 "Return the character on the left of visual point."
|
|
|
1010 (if display-direction
|
|
|
1011 (visual-char-after)
|
|
|
1012 (visual-char-before)))
|
|
|
1013
|
|
|
1014 (defun visual-char-right nil
|
|
|
1015 "Return the character on the right of visual point."
|
|
|
1016 (if display-direction
|
|
|
1017 (visual-char-before)
|
|
|
1018 (visual-char-after)))
|
|
|
1019
|
|
|
1020 (defun visual-move-to-left-char (arg)
|
|
|
1021 "Move the cursor visually left by ARG (integer) characters.
|
|
|
1022 If ARG is negative, move the cursor right."
|
|
|
1023 (interactive "p")
|
|
|
1024 (if display-direction
|
|
|
1025 (visual-forward-char arg)
|
|
|
1026 (visual-backward-char arg)))
|
|
|
1027
|
|
|
1028 (defun visual-move-to-left-1-char nil
|
|
|
1029 "Move the cursor visually left by 1 character."
|
|
|
1030 (interactive "p")
|
|
|
1031 (if display-direction
|
|
|
1032 (visual-forward-1-char)
|
|
|
1033 (visual-backward-1-char)))
|
|
|
1034
|
|
|
1035 (defun visual-move-to-right-char (arg)
|
|
|
1036 "Move the cursor visually right by ARG (integer) characters.
|
|
|
1037 If ARG is negative, move the cursor left."
|
|
|
1038 (interactive "p")
|
|
|
1039 (if display-direction
|
|
|
1040 (visual-backward-char arg)
|
|
|
1041 (visual-forward-char arg)))
|
|
|
1042
|
|
|
1043 (defun visual-move-to-right-1-char nil
|
|
|
1044 "Move the cursor visually right by 1 character."
|
|
|
1045 (interactive "p")
|
|
|
1046 (if display-direction
|
|
|
1047 (visual-backward-1-char)
|
|
|
1048 (visual-forward-1-char)))
|
|
|
1049
|
|
|
1050 (defun visual-move-to-left-word (arg)
|
|
|
1051 "Move the cursor visually left by ARG (integer) words.
|
|
|
1052 If ARG is negative, move the cursor right."
|
|
|
1053 (interactive "p")
|
|
|
1054 (if display-direction
|
|
|
1055 (visual-forward-word arg)
|
|
|
1056 (visual-backward-word arg)))
|
|
|
1057
|
|
|
1058 (defun visual-move-to-right-word (arg)
|
|
|
1059 "Move the cursor visually right by ARG (integer) words.
|
|
|
1060 If ARG is negative, move the cursor left."
|
|
|
1061 (interactive "p")
|
|
|
1062 (if display-direction
|
|
|
1063 (visual-backward-word arg)
|
|
|
1064 (visual-forward-word arg)))
|
|
|
1065
|
|
|
1066 (defun visual-left-end-of-line (arg)
|
|
|
1067 "Move the line cursor to the left-end of line.
|
|
|
1068 With ARG not nil, move forward ARG - 1 lines first.
|
|
|
1069 If scan reaches end of buffer, stop there without error."
|
|
|
1070 (interactive "P")
|
|
|
1071 (if display-direction
|
|
|
1072 (visual-end-of-line arg)
|
|
|
1073 (visual-beginning-of-line arg)))
|
|
|
1074
|
|
|
1075 (defun visual-right-end-of-line (arg)
|
|
|
1076 "Move the line cursor to the right-end of line.
|
|
|
1077 With ARG not nil, move forward ARG - 1 lines first.
|
|
|
1078 If scan reaches end of buffer, stop there without error."
|
|
|
1079 (interactive "P")
|
|
|
1080 (if display-direction
|
|
|
1081 (visual-beginning-of-line arg)
|
|
|
1082 (visual-end-of-line arg)))
|
|
|
1083
|
|
|
1084 (defun visual-insert-char-left (ch arg)
|
|
|
1085 "Insert CH (character) on the left of visual point as many as
|
|
|
1086 ARG (integer)."
|
|
|
1087 (if (< arg 0)
|
|
|
1088 (error "ARG must be >= 0."))
|
|
|
1089 (visual-insert-char ch arg)
|
|
|
1090 (and display-direction
|
|
|
1091 (visual-backward-char arg)))
|
|
|
1092
|
|
|
1093 (defun visual-insert-left-1-char (ch)
|
|
|
1094 "Insert CH (character) on the left of visual point."
|
|
|
1095 (visual-insert-1-char ch)
|
|
|
1096 (and display-direction
|
|
|
1097 (visual-backward-1-char)))
|
|
|
1098
|
|
|
1099 (defun visual-insert-char-right (ch arg)
|
|
|
1100 "Insert CH (character) on the right of visual point as many as
|
|
|
1101 ARG (integer)."
|
|
|
1102 (if (< arg 0)
|
|
|
1103 (error "ARG must be >= 0."))
|
|
|
1104 (visual-insert-char ch arg)
|
|
|
1105 (or display-direction
|
|
|
1106 (visual-backward-char arg)))
|
|
|
1107
|
|
|
1108 (defun visual-insert-right-1-char (ch)
|
|
|
1109 "Insert CH (character) on the right of visual point."
|
|
|
1110 (visual-insert-1-char ch)
|
|
|
1111 (or display-direction
|
|
|
1112 (visual-backward-1-char)))
|
|
|
1113
|
|
|
1114 (defun visual-delete-left-char (arg)
|
|
|
1115 "Delete ARG (integer) characters on the left of visual point.
|
|
|
1116 If ARG is negative, on the right."
|
|
|
1117 (interactive "*p")
|
|
|
1118 (if display-direction
|
|
|
1119 (visual-delete-char arg)
|
|
|
1120 (visual-backward-delete-char arg)))
|
|
|
1121
|
|
|
1122 (defun visual-delete-left-1-char nil
|
|
|
1123 "Delete 1 character on the left of visual point."
|
|
|
1124 (interactive "*p")
|
|
|
1125 (if display-direction
|
|
|
1126 (visual-delete-1-char)
|
|
|
1127 (visual-backward-delete-1-char)))
|
|
|
1128
|
|
|
1129 (defun visual-delete-right-char (arg)
|
|
|
1130 "Delete ARG (integer) characters on the right of visual point.
|
|
|
1131 If ARG is negative, on the left."
|
|
|
1132 (interactive "*p")
|
|
|
1133 (if display-direction
|
|
|
1134 (visual-backward-delete-char arg)
|
|
|
1135 (visual-delete-char arg)))
|
|
|
1136
|
|
|
1137 (defun visual-delete-right-1-char nil
|
|
|
1138 "Delete 1 character on the right of visual point."
|
|
|
1139 (interactive "*p")
|
|
|
1140 (if display-direction
|
|
|
1141 (visual-backward-delete-1-char)
|
|
|
1142 (visual-delete-1-char)))
|
|
|
1143
|
|
|
1144 (defmacro visual-replace-left-1-char (ch)
|
|
|
1145 (list
|
|
|
1146 'progn
|
|
|
1147 '(visual-delete-left-1-char)
|
|
|
1148 (list 'visual-insert-left-1-char ch)))
|
|
|
1149
|
|
|
1150 (defmacro visual-replace-right-1-char (ch)
|
|
|
1151 (list
|
|
|
1152 'progn
|
|
|
1153 '(visual-delete-right-1-char)
|
|
|
1154 (list 'visual-insert-right-1-char ch)))
|
|
|
1155
|
|
|
1156 (defun visual-kill-left-word (arg)
|
|
|
1157 "Kill ARG (integer) words on the left of visual pointer.
|
|
|
1158 If ARG is negative, kill on the right."
|
|
|
1159 (interactive "*p")
|
|
|
1160 (if display-direction
|
|
|
1161 (visual-kill-word arg)
|
|
|
1162 (visual-backward-kill-word arg)))
|
|
|
1163
|
|
|
1164 (defun visual-kill-right-word (arg)
|
|
|
1165 "Kill ARG (integer) words on the right of visual point.
|
|
|
1166 If ARG is negative, kill on the left."
|
|
|
1167 (interactive "*p")
|
|
|
1168 (if display-direction
|
|
|
1169 (visual-backward-kill-word arg)
|
|
|
1170 (visual-kill-word arg)))
|
|
|
1171
|
|
|
1172 ;;;
|
|
|
1173 (provide 'visual-mode)
|
