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1 ;; x-select.el --- Elisp interface to X Selections.
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2 ;; Copyright (C) 1990 Free Software Foundation, Inc.
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3 ;; Copyright (C) 1995 Sun Microsystems.
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4
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5 ;; This file is part of XEmacs.
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6
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7 ;; XEmacs is free software; you can redistribute it and/or modify it
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8 ;; under the terms of the GNU General Public License as published by
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9 ;; the Free Software Foundation; either version 2, or (at your option)
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10 ;; any later version.
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11
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12 ;; XEmacs is distributed in the hope that it will be useful, but
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13 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 ;; General Public License for more details.
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16
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17 ;; You should have received a copy of the GNU General Public License
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18 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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19 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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20
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21 ;;; The selection code requires us to use certain symbols whose names are
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22 ;;; all upper-case; this may seem tasteless, but it makes there be a 1:1
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23 ;;; correspondence between these symbols and X Atoms (which are upcased).
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24
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25 ;;; Synched up with: FSF 19.30 (select.el).
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26
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27 ;;; Code:
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28
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29 (defvar x-selected-text-type 'STRING
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30 "The type atom used to obtain selections from the X server.")
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31
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32 (defun x-get-selection (&optional type data-type)
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33 "Return the value of an X Windows selection.
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34 The argument TYPE (default `PRIMARY') says which selection,
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35 and the argument DATA-TYPE (default `STRING') says how to convert the data."
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36 (or type (setq type 'PRIMARY))
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37 (or data-type (setq data-type x-selected-text-type))
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38 (let ((text (x-get-selection-internal type data-type)))
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39 (if (and (consp text) (symbolp (car text)))
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40 (setq text (cdr text)))
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41 (if (not (stringp text))
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42 (error "Selection is not a string: %S" text)
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43 text)))
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44
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45 (defun x-get-secondary-selection ()
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46 "Return text selected from some X window."
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47 (x-get-selection 'SECONDARY))
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48
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49 (defun x-get-clipboard ()
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50 "Return text pasted to the clipboard."
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51 (x-get-selection 'CLIPBOARD))
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52
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53
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54 (defvar primary-selection-extent nil
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55 "The extent of the primary selection; don't use this.")
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56
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57 (defvar secondary-selection-extent nil
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58 "The extent of the secondary selection; don't use this.")
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59
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60
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61 (defun x-select-make-extent-for-selection (selection previous-extent)
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62 ;; Given a selection, this makes an extent in the buffer which holds that
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63 ;; selection, for highlighting purposes. If the selection isn't associated
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64 ;; with a buffer, this does nothing.
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65 (let ((buffer nil)
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66 (valid (and (extentp previous-extent)
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67 (extent-object previous-extent)
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68 (buffer-live-p (extent-object previous-extent))))
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69 start end)
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70 (cond ((stringp selection)
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71 ;; if we're selecting a string, lose the previous extent used
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72 ;; to highlight the selection.
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73 (setq valid nil))
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74 ((consp selection)
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75 (setq start (min (car selection) (cdr selection))
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76 end (max (car selection) (cdr selection))
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77 valid (and valid
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78 (eq (marker-buffer (car selection))
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79 (extent-object previous-extent)))
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80 buffer (marker-buffer (car selection))))
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81 ((extentp selection)
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82 (setq start (extent-start-position selection)
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83 end (extent-end-position selection)
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84 valid (and valid
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85 (eq (extent-object selection)
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86 (extent-object previous-extent)))
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87 buffer (extent-object selection)))
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88 (t
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89 (signal 'error (list "invalid selection" selection))))
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90
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91 (if valid
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92 nil
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93 (condition-case ()
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94 (if (listp previous-extent)
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95 (mapcar 'delete-extent previous-extent)
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96 (delete-extent previous-extent))
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97 (error nil)))
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98
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99 (if (not buffer)
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100 ;; string case
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101 nil
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102 ;; normal case
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103 (if valid
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104 (set-extent-endpoints previous-extent start end)
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105 (setq previous-extent (make-extent start end buffer))
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106
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107 ;; Make the extent be closed on the right, which means that if
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108 ;; characters are inserted exactly at the end of the extent, the
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109 ;; extent will grow to cover them. This is important for shell
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110 ;; buffers - suppose one makes a selection, and one end is at
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111 ;; point-max. If the shell produces output, that marker will remain
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112 ;; at point-max (its position will increase). So it's important that
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113 ;; the extent exhibit the same behavior, lest the region covered by
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114 ;; the extent (the visual indication), and the region between point
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115 ;; and mark (the actual selection value) become different!
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116 (set-extent-property previous-extent 'end-open nil)
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117
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118 (cond
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119 (mouse-track-rectangle-p
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120 (setq previous-extent (list previous-extent))
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121 (default-mouse-track-next-move-rect start end previous-extent)
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122 ))
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123 previous-extent))))
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124
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125 ;; FSFmacs calls this `x-set-selection', and reverses the
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126 ;; arguments (duh ...). This order is more logical.
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127 (defun x-own-selection (data &optional type)
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128 "Make an X Windows selection of type TYPE and value DATA.
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129 The argument TYPE (default `PRIMARY') says which selection,
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130 and DATA specifies the contents. DATA may be a string,
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131 a symbol, an integer (or a cons of two integers or list of two integers).
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132
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133 The selection may also be a cons of two markers pointing to the same buffer,
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134 or an overlay. In these cases, the selection is considered to be the text
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135 between the markers *at whatever time the selection is examined*.
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136 Thus, editing done in the buffer after you specify the selection
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137 can alter the effective value of the selection.
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138
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139 The data may also be a vector of valid non-vector selection values.
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140
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141 Interactively, the text of the region is used as the selection value."
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142 (interactive (if (not current-prefix-arg)
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143 (list (read-string "Store text for pasting: "))
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144 (list (substring (region-beginning) (region-end)))))
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145 ;FSFmacs huh?? It says:
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146 ;; "This is for temporary compatibility with pre-release Emacs 19."
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147 ;(if (stringp type)
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148 ; (setq type (intern type)))
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149 (or (x-valid-simple-selection-p data)
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150 (and (vectorp data)
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151 (let ((valid t)
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152 (i (1- (length data))))
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153 (while (>= i 0)
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154 (or (x-valid-simple-selection-p (aref data i))
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155 (setq valid nil))
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156 (setq i (1- i)))
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157 valid))
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158 (signal 'error (list "invalid selection" data)))
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159 (or type (setq type 'PRIMARY))
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160 (if data
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161 (x-own-selection-internal type data)
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162 (x-disown-selection-internal type))
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163 (cond ((eq type 'PRIMARY)
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164 (setq primary-selection-extent
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165 (x-select-make-extent-for-selection
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166 data primary-selection-extent)))
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167 ((eq type 'SECONDARY)
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168 (setq secondary-selection-extent
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169 (x-select-make-extent-for-selection
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170 data secondary-selection-extent))))
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171 (setq zmacs-region-stays t)
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172 data)
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173
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174 (defun x-valid-simple-selection-p (data)
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175 (or (stringp data)
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176 ;FSFmacs huh?? (symbolp data)
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177 (integerp data)
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178 (and (consp data)
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179 (integerp (car data))
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180 (or (integerp (cdr data))
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181 (and (consp (cdr data))
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182 (integerp (car (cdr data))))))
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183 (extentp data)
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184 (and (consp data)
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185 (markerp (car data))
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186 (markerp (cdr data))
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187 (marker-buffer (car data))
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188 (marker-buffer (cdr data))
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189 (eq (marker-buffer (car data))
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190 (marker-buffer (cdr data)))
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191 (buffer-live-p (marker-buffer (car data)))
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192 (buffer-live-p (marker-buffer (cdr data))))))
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193
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194 (defun x-own-secondary-selection (selection &optional type)
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195 "Make a secondary X Selection of the given argument. The argument may be a
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196 string or a cons of two markers (in which case the selection is considered to
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197 be the text between those markers)."
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198 (interactive (if (not current-prefix-arg)
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199 (list (read-string "Store text for pasting: "))
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200 (list (cons ;; these need not be ordered.
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201 (copy-marker (point-marker))
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202 (copy-marker (mark-marker))))))
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203 (x-own-selection selection 'SECONDARY))
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204
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205
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206 (defun x-own-clipboard (string)
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207 "Paste the given string to the X Clipboard."
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208 (x-own-selection string 'CLIPBOARD))
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209
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210
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211 (defun x-disown-selection (&optional secondary-p)
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212 "Assuming we own the selection, disown it. With an argument, discard the
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213 secondary selection instead of the primary selection."
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214 (x-disown-selection-internal (if secondary-p 'SECONDARY 'PRIMARY)))
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215
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216 (defun x-dehilight-selection (selection)
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217 "for use as a value of `x-lost-selection-hooks'."
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218 (cond ((eq selection 'PRIMARY)
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219 (if primary-selection-extent
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220 (let ((inhibit-quit t))
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221 (if (consp primary-selection-extent)
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222 (mapcar 'delete-extent primary-selection-extent)
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223 (delete-extent primary-selection-extent))
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224 (setq primary-selection-extent nil)))
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225 (if zmacs-regions (zmacs-deactivate-region)))
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226 ((eq selection 'SECONDARY)
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227 (if secondary-selection-extent
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228 (let ((inhibit-quit t))
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229 (if (consp secondary-selection-extent)
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230 (mapcar 'delete-extent secondary-selection-extent)
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231 (delete-extent secondary-selection-extent))
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232 (setq secondary-selection-extent nil)))))
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233 nil)
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234
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235 (setq x-lost-selection-hooks 'x-dehilight-selection)
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236
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237 (defun x-notice-selection-requests (selection type successful)
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238 "for possible use as the value of x-sent-selection-hooks."
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239 (if (not successful)
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240 (message "Selection request failed to convert %s to %s"
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241 selection type)
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242 (message "Sent selection %s as %s" selection type)))
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243
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244 (defun x-notice-selection-failures (selection type successful)
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245 "for possible use as the value of x-sent-selection-hooks."
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246 (or successful
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247 (message "Selection request failed to convert %s to %s"
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248 selection type)))
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249
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250 ;(setq x-sent-selection-hooks 'x-notice-selection-requests)
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251 ;(setq x-sent-selection-hooks 'x-notice-selection-failures)
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252
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253
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254 ;;; Selections in killed buffers
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255 ;;; this function is called by kill-buffer as if it were on the
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256 ;;; kill-buffer-hook (though it isn't really).
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257
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258 (defun xselect-kill-buffer-hook ()
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259 ;; Probably the right thing is to write a C function to return a list
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260 ;; of the selections which emacs owns, since it could concievably own
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261 ;; a user-defined selection type that we've never heard of.
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262 (xselect-kill-buffer-hook-1 'PRIMARY)
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263 (xselect-kill-buffer-hook-1 'SECONDARY)
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264 (xselect-kill-buffer-hook-1 'CLIPBOARD))
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265
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266 (defun xselect-kill-buffer-hook-1 (selection)
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267 (let (value)
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268 (if (and (x-selection-owner-p selection)
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269 (setq value (x-get-selection-internal selection '_EMACS_INTERNAL))
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270 ;; The _EMACS_INTERNAL selection type has a converter registered
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271 ;; for it that does no translation. This only works if emacs is
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272 ;; requesting the selection from itself. We could have done this
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273 ;; by writing a C function to return the raw selection data, and
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274 ;; that might be the right way to do this, but this was easy.
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275 (or (and (consp value)
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276 (markerp (car value))
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277 (eq (current-buffer) (marker-buffer (car value))))
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278 (and (extent-live-p value)
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279 (eq (current-buffer) (extent-object value)))
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280 (and (extentp value) (not (extent-live-p value)))))
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281 (x-disown-selection-internal selection))))
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282
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283
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284 ;;; Cut Buffer support
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285
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286 ;;; FSF name x-get-cut-buffer
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287 (defun x-get-cutbuffer (&optional which-one)
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288 "Returns the value of one of the 8 X server cut buffers. Optional arg
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289 WHICH-ONE should be a number from 0 to 7, defaulting to 0.
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290 Cut buffers are considered obsolete\; you should use selections instead.
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291 This function does nothing if support for cut buffers was not compiled
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292 into Emacs."
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293 (and (fboundp 'x-get-cutbuffer-internal)
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294 (x-get-cutbuffer-internal
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295 (if which-one
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296 (aref [CUT_BUFFER0 CUT_BUFFER1 CUT_BUFFER2 CUT_BUFFER3
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297 CUT_BUFFER4 CUT_BUFFER5 CUT_BUFFER6 CUT_BUFFER7]
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298 which-one)
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299 'CUT_BUFFER0))))
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300
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301 ;;; FSF name x-set-cut-buffer
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302 (defun x-store-cutbuffer (string &optional push)
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303 "Store STRING into the X server's primary cut buffer.
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304 If PUSH is non-nil, also rotate the cut buffers:
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305 this means the previous value of the primary cut buffer moves the second
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306 cut buffer, and the second to the third, and so on (there are 8 buffers.)
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307 Cut buffers are considered obsolete; you should use selections instead.
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308 This function does nothing if support for cut buffers was not compiled
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309 into Emacs."
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310 (and (fboundp 'x-store-cutbuffer-internal)
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311 (progn
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312 ;; Check the data type of STRING.
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313 (substring string 0 0)
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314 (if push
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315 (x-rotate-cutbuffers-internal 1))
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316 (x-store-cutbuffer-internal 'CUT_BUFFER0 string))))
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317
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318
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319 ;;; Random utility functions
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320
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321 (defun x-cut-copy-clear-internal (mode)
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322 (or (memq mode '(cut copy clear)) (error "unkown mode %S" mode))
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323 (or (x-selection-owner-p)
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324 (error "emacs does not own the primary selection"))
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325 (setq last-command nil)
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326 (or primary-selection-extent
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327 (error "the primary selection is not an extent?"))
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328 (save-excursion
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329 (let (rect-p b s e)
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330 (cond
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331 ((consp primary-selection-extent)
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332 (setq rect-p t
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333 b (extent-object (car primary-selection-extent))
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334 s (extent-start-position (car primary-selection-extent))
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335 e (extent-end-position (car (reverse primary-selection-extent)))))
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336 (t
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337 (setq rect-p nil
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338 b (extent-object primary-selection-extent)
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339 s (extent-start-position primary-selection-extent)
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340 e (extent-end-position primary-selection-extent))))
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341 (set-buffer b)
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342 (cond ((memq mode '(cut copy))
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343 (if rect-p
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344 (progn
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345 ;; why is killed-rectangle free? Is it used somewhere?
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346 ;; should it be defvarred?
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347 (setq killed-rectangle (extract-rectangle s e))
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348 (kill-new (mapconcat 'identity killed-rectangle "\n")))
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349 (copy-region-as-kill s e))
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350 ;; Maybe killing doesn't own clipboard. Make sure it happens.
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351 ;; This memq is kind of grody, because they might have done it
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352 ;; some other way, but owning the clipboard twice in that case
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353 ;; wouldn't actually hurt anything.
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354 (or (and (consp kill-hooks) (memq 'x-own-clipboard kill-hooks))
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355 (x-own-clipboard (car kill-ring)))))
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356 (cond ((memq mode '(cut clear))
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357 (if rect-p
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358 (delete-rectangle s e)
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359 (delete-region s e))))
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360 (x-disown-selection nil)
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361 )))
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362
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363 (defun x-copy-primary-selection ()
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364 "Copy the selection to the Clipboard and the kill ring."
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365 (interactive)
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366 (x-cut-copy-clear-internal 'copy))
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367
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368 (defun x-kill-primary-selection ()
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369 "Copy the selection to the Clipboard and the kill ring, then delete it."
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370 (interactive "*")
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371 (x-cut-copy-clear-internal 'cut))
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372
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373 (defun x-delete-primary-selection ()
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374 "Delete the selection without copying it to the Clipboard or the kill ring."
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375 (interactive "*")
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376 (x-cut-copy-clear-internal 'clear))
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377
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378 (defun x-yank-clipboard-selection ()
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379 "Insert the current Clipboard selection at point."
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380 (interactive "*")
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381 (setq last-command nil)
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382 (setq this-command 'yank) ; so that yank-pop works.
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383 (let ((clip (x-get-clipboard)))
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384 (or clip (error "there is no clipboard selection"))
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385 (push-mark)
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386 (insert clip)))
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387
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388 ;;; Functions to convert the selection into various other selection types.
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389 ;;; Every selection type that emacs handles is implemented this way, except
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390 ;;; for TIMESTAMP, which is a special case.
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391
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392 (defun xselect-convert-to-text (selection type value)
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393 (cond ((stringp value)
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394 value)
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395 ((extentp value)
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396 (save-excursion
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397 (set-buffer (extent-object value))
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398 (save-restriction
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399 (widen)
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400 (buffer-substring (extent-start-position value)
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401 (extent-end-position value)))))
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402 ((and (consp value)
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403 (markerp (car value))
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404 (markerp (cdr value)))
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405 (or (eq (marker-buffer (car value)) (marker-buffer (cdr value)))
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406 (signal 'error
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407 (list "markers must be in the same buffer"
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408 (car value) (cdr value))))
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409 (save-excursion
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410 (set-buffer (or (marker-buffer (car value))
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411 (error "selection is in a killed buffer")))
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412 (save-restriction
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413 (widen)
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414 (buffer-substring (car value) (cdr value)))))
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415 (t nil)))
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416
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417 (defun xselect-convert-to-string (selection type value)
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418 (let ((outval (xselect-convert-to-text selection type value)))
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419 ;; force the string to be not in Compound Text format.
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420 (if (stringp outval)
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421 (cons 'STRING outval)
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422 outval)))
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423
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424 (defun xselect-convert-to-length (selection type value)
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425 (let ((value
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426 (cond ((stringp value)
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427 (length value))
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428 ((extentp value)
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429 (extent-length value))
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430 ((and (consp value)
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431 (markerp (car value))
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432 (markerp (cdr value)))
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433 (or (eq (marker-buffer (car value))
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434 (marker-buffer (cdr value)))
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435 (signal 'error
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436 (list "markers must be in the same buffer"
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437 (car value) (cdr value))))
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438 (abs (- (car value) (cdr value)))))))
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439 (if value ; force it to be in 32-bit format.
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440 (cons (ash value -16) (logand value 65535))
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441 nil)))
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442
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443 (defun xselect-convert-to-targets (selection type value)
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444 ;; return a vector of atoms, but remove duplicates first.
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445 (let* ((all (cons 'TIMESTAMP (mapcar 'car selection-converter-alist)))
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446 (rest all))
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447 (while rest
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448 (cond ((memq (car rest) (cdr rest))
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449 (setcdr rest (delq (car rest) (cdr rest))))
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450 ((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret
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451 (setcdr rest (cdr (cdr rest))))
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452 (t
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453 (setq rest (cdr rest)))))
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454 (apply 'vector all)))
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455
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456 (defun xselect-convert-to-delete (selection type value)
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457 (x-disown-selection-internal selection)
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458 ;; A return value of nil means that we do not know how to do this conversion,
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459 ;; and replies with an "error". A return value of NULL means that we have
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460 ;; done the conversion (and any side-effects) but have no value to return.
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461 'NULL)
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462
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463 (defun xselect-convert-to-filename (selection type value)
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464 (cond ((extentp value)
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465 (buffer-file-name (or (extent-object value)
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466 (error "selection is in a killed buffer"))))
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467 ((and (consp value)
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468 (markerp (car value))
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469 (markerp (cdr value)))
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470 (buffer-file-name (or (marker-buffer (car value))
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471 (error "selection is in a killed buffer"))))
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472 (t nil)))
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473
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474 (defun xselect-convert-to-charpos (selection type value)
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475 (let (a b tmp)
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476 (cond ((cond ((extentp value)
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477 (setq a (extent-start-position value)
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478 b (extent-end-position value)))
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479 ((and (consp value)
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480 (markerp (car value))
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481 (markerp (cdr value)))
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482 (setq a (car value)
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483 b (cdr value))))
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484 (setq a (1- a) b (1- b)) ; zero-based
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485 (if (< b a) (setq tmp a a b b tmp))
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486 (cons 'SPAN
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487 (vector (cons (ash a -16) (logand a 65535))
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488 (cons (ash b -16) (logand b 65535))))))))
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489
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490 (defun xselect-convert-to-lineno (selection type value)
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491 (let (a b buf tmp)
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492 (cond ((cond ((extentp value)
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493 (setq buf (extent-object value)
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494 a (extent-start-position value)
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495 b (extent-end-position value)))
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496 ((and (consp value)
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497 (markerp (car value))
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498 (markerp (cdr value)))
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499 (setq a (marker-position (car value))
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500 b (marker-position (cdr value))
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501 buf (marker-buffer (car value)))))
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502 (save-excursion
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503 (set-buffer buf)
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504 (save-restriction
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505 (widen)
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506 (goto-char a)
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507 (beginning-of-line)
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508 (setq a (1+ (count-lines 1 (point))))
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509 (goto-char b)
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510 (beginning-of-line)
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511 (setq b (1+ (count-lines 1 (point))))))
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512 (if (< b a) (setq tmp a a b b tmp))
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513 (cons 'SPAN
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514 (vector (cons (ash a -16) (logand a 65535))
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515 (cons (ash b -16) (logand b 65535))))))))
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516
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517 (defun xselect-convert-to-colno (selection type value)
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518 (let (a b buf tmp)
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519 (cond ((cond ((extentp value)
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520 (setq buf (extent-object value)
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521 a (extent-start-position value)
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522 b (extent-end-position value)))
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523 ((and (consp value)
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524 (markerp (car value))
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525 (markerp (cdr value)))
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526 (setq a (car value)
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527 b (cdr value)
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528 buf (marker-buffer a))))
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529 (save-excursion
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530 (set-buffer buf)
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531 (goto-char a)
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532 (setq a (current-column))
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533 (goto-char b)
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534 (setq b (current-column)))
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535 (if (< b a) (setq tmp a a b b tmp))
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536 (cons 'SPAN
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537 (vector (cons (ash a -16) (logand a 65535))
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538 (cons (ash b -16) (logand b 65535))))))))
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539
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540 (defun xselect-convert-to-sourceloc (selection type value)
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541 (let (a b buf file-name tmp)
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542 (cond ((cond ((extentp value)
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543 (setq buf (or (extent-object value)
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544 (error "selection is in a killed buffer"))
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545 a (extent-start-position value)
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546 b (extent-end-position value)
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547 file-name (buffer-file-name buf)))
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548 ((and (consp value)
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549 (markerp (car value))
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550 (markerp (cdr value)))
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551 (setq a (marker-position (car value))
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552 b (marker-position (cdr value))
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553 buf (or (marker-buffer (car value))
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554 (error "selection is in a killed buffer"))
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555 file-name (buffer-file-name buf))))
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556 (save-excursion
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557 (set-buffer buf)
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558 (save-restriction
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559 (widen)
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560 (goto-char a)
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561 (beginning-of-line)
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562 (setq a (1+ (count-lines 1 (point))))
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563 (goto-char b)
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564 (beginning-of-line)
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565 (setq b (1+ (count-lines 1 (point))))))
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566 (if (< b a) (setq tmp a a b b tmp))
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567 (format "%s:%d" file-name a)))))
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568
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569 (defun xselect-convert-to-os (selection type size)
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570 (symbol-name system-type))
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571
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572 (defun xselect-convert-to-host (selection type size)
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573 (system-name))
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574
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575 (defun xselect-convert-to-user (selection type size)
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576 (user-full-name))
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577
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578 (defun xselect-convert-to-class (selection type size)
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579 x-emacs-application-class)
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|
580
|
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|
581 ;; We do not try to determine the name Emacs was invoked with,
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|
582 ;; because it is not clean for a program's behavior to depend on that.
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583 (defun xselect-convert-to-name (selection type size)
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|
584 ;invocation-name
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585 "xemacs")
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586
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|
587 (defun xselect-convert-to-integer (selection type value)
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|
|
588 (and (integerp value)
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|
|
589 (cons (ash value -16) (logand value 65535))))
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|
590
|
|
|
591 (defun xselect-convert-to-atom (selection type value)
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|
|
592 (and (symbolp value) value))
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|
|
593
|
|
|
594 (defun xselect-convert-to-identity (selection type value) ; used internally
|
|
|
595 (vector value))
|
|
|
596
|
|
|
597 (setq selection-converter-alist
|
|
|
598 '((TEXT . xselect-convert-to-text)
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|
|
599 (STRING . xselect-convert-to-string)
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|
|
600 (TARGETS . xselect-convert-to-targets)
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|
|
601 (LENGTH . xselect-convert-to-length)
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|
|
602 (DELETE . xselect-convert-to-delete)
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|
|
603 (FILE_NAME . xselect-convert-to-filename)
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|
|
604 (CHARACTER_POSITION . xselect-convert-to-charpos)
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|
605 (SOURCE_LOC . xselect-convert-to-sourceloc)
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|
|
606 (LINE_NUMBER . xselect-convert-to-lineno)
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|
|
607 (COLUMN_NUMBER . xselect-convert-to-colno)
|
|
|
608 (OWNER_OS . xselect-convert-to-os)
|
|
|
609 (HOST_NAME . xselect-convert-to-host)
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|
|
610 (USER . xselect-convert-to-user)
|
|
|
611 (CLASS . xselect-convert-to-class)
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|
612 (NAME . xselect-convert-to-name)
|
|
|
613 (ATOM . xselect-convert-to-atom)
|
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|
614 (INTEGER . xselect-convert-to-integer)
|
|
|
615 (_EMACS_INTERNAL . xselect-convert-to-identity)
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|
|
616 ))
|
|
|
617
|
|
|
618 ;FSFmacs (provide 'select)
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|
619
|
|
|
620 ;;; x-select.el ends here.
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621
|
