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398
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1 /* Generic selection processing for XEmacs
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2 Copyright (C) 1999 Free Software Foundation, Inc.
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3 Copyright (C) 1999 Andy Piper.
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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 the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 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
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: Not synched with FSF. */
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23
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24 #include <config.h>
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25 #include "lisp.h"
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26
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27 #include "buffer.h"
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28 #include "device.h"
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410
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29 #include "extents.h"
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398
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30 #include "console.h"
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31 #include "objects.h"
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32
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33 #include "frame.h"
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34 #include "opaque.h"
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35 #include "select.h"
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36
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410
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37 /* X Atoms */
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398
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38 Lisp_Object QPRIMARY, QSECONDARY, QSTRING, QINTEGER, QCLIPBOARD, QTIMESTAMP,
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39 QTEXT, QDELETE, QMULTIPLE, QINCR, QEMACS_TMP, QTARGETS, QATOM, QNULL,
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40 QATOM_PAIR, QCOMPOUND_TEXT;
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41
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410
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42 /* Windows clipboard formats */
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43 Lisp_Object QCF_TEXT, QCF_BITMAP, QCF_METAFILEPICT, QCF_SYLK, QCF_DIF,
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44 QCF_TIFF, QCF_OEMTEXT, QCF_DIB, QCF_PALETTE, QCF_PENDATA, QCF_RIFF,
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45 QCF_WAVE, QCF_UNICODETEXT, QCF_ENHMETAFILE, QCF_HDROP, QCF_LOCALE,
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46 QCF_OWNERDISPLAY, QCF_DSPTEXT, QCF_DSPBITMAP, QCF_DSPMETAFILEPICT,
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47 QCF_DSPENHMETAFILE;
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48
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49 /* Selection strategy symbols */
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50 Lisp_Object Qreplace_all, Qreplace_existing;
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51
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398
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52 /* "Selection owner couldn't convert selection" */
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53 Lisp_Object Qselection_conversion_error;
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54
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410
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55 /* A couple of Lisp functions */
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56 Lisp_Object Qselect_convert_in, Qselect_convert_out;
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57
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58 /* These are alists whose CARs are selection-types (whose names are the same
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59 as the names of X Atoms or Windows clipboard formats) and whose CDRs are
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60 the names of Lisp functions to call to convert the given Emacs selection
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61 value to a string representing the given selection type. This is for
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62 elisp-level extension of the emacs selection handling.
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398
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63 */
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410
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64 Lisp_Object Vselection_converter_out_alist;
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65 Lisp_Object Vselection_converter_in_alist;
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66 Lisp_Object Vselection_appender_alist;
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67 Lisp_Object Vselection_buffer_killed_alist;
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68 Lisp_Object Vselection_coercible_types;
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398
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69
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70 Lisp_Object Vlost_selection_hooks;
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71
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72 /* This is an association list whose elements are of the form
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73 ( selection-name selection-value selection-timestamp )
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74 selection-name is a lisp symbol, whose name is the name of an X Atom.
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410
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75 selection-value is a list of cons pairs that emacs owns for that selection.
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76 Each pair consists of (type . value), where type is nil or a
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77 selection data type, and value is any type of Lisp object.
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398
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78 selection-timestamp is the time at which emacs began owning this selection,
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79 as a cons of two 16-bit numbers (making a 32 bit time).
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80 If there is an entry in this alist, then it can be assumed that emacs owns
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81 that selection.
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82 The only (eq) parts of this list that are visible from elisp are the
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83 selection-values.
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84 */
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85 Lisp_Object Vselection_alist;
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86
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410
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87 /* Given a selection-name and desired type, this looks up our local copy of
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88 the selection value and converts it to the type. */
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398
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89 static Lisp_Object
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90 get_local_selection (Lisp_Object selection_symbol, Lisp_Object target_type)
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91 {
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92 Lisp_Object local_value = assq_no_quit (selection_symbol, Vselection_alist);
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93
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410
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94 if (!NILP (local_value))
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95 {
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96 Lisp_Object value_list = XCAR (XCDR (local_value));
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97 Lisp_Object value;
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398
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98
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410
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99 /* First try to find an entry of the appropriate type */
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100 value = assq_no_quit (target_type, value_list);
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101
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102 if (!NILP (value))
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103 return XCDR (value);
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398
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104 }
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105
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410
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106 return Qnil;
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398
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107 }
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108
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410
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109 /* #### Should perhaps handle 'MULTIPLE. The code below is now completely
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110 broken due to a re-organization of get_local_selection, but I've left
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111 it here should anyone show an interest - ajh */
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112 #if 0
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113 else if (CONSP (target_type) &&
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114 XCAR (target_type) == QMULTIPLE)
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115 {
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116 Lisp_Object pairs = XCDR (target_type);
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117 int len = XVECTOR_LENGTH (pairs);
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118 int i;
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119 /* If the target is MULTIPLE, then target_type looks like
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120 (MULTIPLE . [[SELECTION1 TARGET1] [SELECTION2 TARGET2] ... ])
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121 We modify the second element of each pair in the vector and
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122 return it as [[SELECTION1 <value1>] [SELECTION2 <value2>] ... ]
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123 */
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124 for (i = 0; i < len; i++)
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125 {
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126 Lisp_Object pair = XVECTOR_DATA (pairs) [i];
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127 XVECTOR_DATA (pair) [1] =
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128 x_get_local_selection (XVECTOR_DATA (pair) [0],
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129 XVECTOR_DATA (pair) [1]);
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130 }
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131 return pairs;
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132 }
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133 #endif
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134
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135 DEFUN ("own-selection-internal", Fown_selection_internal, 2, 5, 0, /*
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136 Assert a selection of the given NAME with the given VALUE, and
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137 optional window-system DATA-TYPE. HOW-TO-ADD specifies how the
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138 selection will be combined with any existing selection(s) - see
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139 `own-selection' for more information.
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140 NAME is a symbol, typically PRIMARY, SECONDARY, or CLIPBOARD.
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398
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141 VALUE is typically a string, or a cons of two markers, but may be
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410
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142 anything that the functions on selection-converter-out-alist know about.
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398
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143 */
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410
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144 (selection_name, selection_value, how_to_add, data_type, device))
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398
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145 {
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410
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146 Lisp_Object selection_time, selection_data, prev_value = Qnil,
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147 value_list = Qnil;
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148 Lisp_Object prev_real_value = Qnil;
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398
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149 struct gcpro gcpro1;
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150
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151 CHECK_SYMBOL (selection_name);
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152 if (NILP (selection_value)) error ("selection-value may not be nil.");
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153
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154 if (NILP (device))
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155 device = Fselected_device (Qnil);
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156
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410
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157 if (!EQ (how_to_add, Qappend) && !EQ (how_to_add, Qt)
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158 && !EQ (how_to_add, Qreplace_existing)
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159 && !EQ (how_to_add, Qreplace_all) && !NILP (how_to_add))
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160 error ("how-to-add must be nil, append, replace_all, "
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161 "replace_existing or t.");
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162
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163 #ifdef MULE
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164 if (NILP (data_type))
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165 data_type = QCOMPOUND_TEXT;
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166 #else
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167 if (NILP (data_type))
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168 data_type = QSTRING;
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169 #endif
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170
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171 /* Examine the how-to-add argument */
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172 if (EQ (how_to_add, Qreplace_all) || NILP (how_to_add))
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173 {
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174 Lisp_Object local_selection_data = assq_no_quit (selection_name,
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175 Vselection_alist);
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176
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177 if (!NILP (local_selection_data))
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178 {
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179 /* Don't use Fdelq() as that may QUIT;. */
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180 if (EQ (local_selection_data, Fcar (Vselection_alist)))
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181 Vselection_alist = Fcdr (Vselection_alist);
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182 else
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183 {
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184 Lisp_Object rest;
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185 for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest))
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186 if (EQ (local_selection_data, Fcar (XCDR (rest))))
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187 {
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188 XCDR (rest) = Fcdr (XCDR (rest));
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189 break;
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190 }
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191 }
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192 }
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193 }
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194 else
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195 {
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196 /* Look for a previous value */
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197 prev_value = assq_no_quit (selection_name, Vselection_alist);
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398
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198
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410
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199 if (!NILP (prev_value))
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200 value_list = XCAR (XCDR (prev_value));
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201
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202 if (!NILP (value_list))
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203 prev_real_value = assq_no_quit (data_type, value_list);
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204 }
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205
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206 /* Append values if necessary */
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207 if (!NILP (value_list) && (EQ (how_to_add, Qappend) || EQ (how_to_add, Qt)))
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208 {
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209 /* Did we have anything of this type previously? */
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210 if (!NILP (prev_real_value))
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211 {
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212 if ((NILP (data_type) && STRINGP (selection_value)
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213 && STRINGP (XCDR (prev_real_value)))
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214 || !NILP (data_type))
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215 {
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216 Lisp_Object function = assq_no_quit (data_type,
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217 Vselection_appender_alist);
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218
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219 if (NILP (function))
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220 error ("cannot append selections of supplied types.");
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221
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222 function = XCDR (function);
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223
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224 selection_value = call4 (function,
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225 selection_name,
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226 data_type,
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227 XCDR (prev_real_value),
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228 selection_value);
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229
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230 if (NILP (selection_value))
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231 error ("cannot append selections of supplied types.");
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232 }
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233 else
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234 error ("cannot append selections of supplied types.");
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235 }
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236
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237 selection_data = Fcons (data_type, selection_value);
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238 value_list = Fcons (selection_data, value_list);
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239 }
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398
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240
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410
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241 if (!NILP (prev_real_value))
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398
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242 {
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410
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243 Lisp_Object rest; /* We know it isn't the CAR, so it's easy. */
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244
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245 /* Delete the old type entry from the list */
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246 for (rest = value_list; !NILP (rest); rest = Fcdr (rest))
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247 if (EQ (prev_real_value, Fcar (XCDR (rest))))
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398
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248 {
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249 XCDR (rest) = Fcdr (XCDR (rest));
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250 break;
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410
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251 }
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252 }
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253 else
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254 {
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255 value_list = Fcons (Fcons (data_type, selection_value),
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256 value_list);
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398
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257 }
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410
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258
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259 /* Complete the local cache update; note that we destructively
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260 modify the current list entry if there is one */
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261 if (NILP (prev_value))
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262 {
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263 selection_data = list3 (selection_name, value_list, Qnil);
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264 Vselection_alist = Fcons (selection_data, Vselection_alist);
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265 }
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266 else
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267 {
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268 selection_data = prev_value;
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269 Fsetcar (XCDR (selection_data), value_list);
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270 }
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271
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272 GCPRO1 (selection_data);
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398
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273
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274 /* have to do device specific stuff last so that methods can access the
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275 selection_alist */
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276 if (HAS_DEVMETH_P (XDEVICE (device), own_selection))
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277 selection_time = DEVMETH (XDEVICE (device), own_selection,
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410
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278 (selection_name, selection_value,
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279 how_to_add, data_type));
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398
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280 else
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281 selection_time = Qnil;
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282
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283 Fsetcar (XCDR (XCDR (selection_data)), selection_time);
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284
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285 UNGCPRO;
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286
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287 return selection_value;
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288 }
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289
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410
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290 DEFUN ("register-selection-data-type", Fregister_selection_data_type, 1,2,0, /*
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291 Register a new selection data type DATA-TYPE, optionally on the specified
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292 DEVICE. Returns the device-specific data type identifier, or nil if the
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293 device does not support this feature or the registration fails. */
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294 (data_type, device))
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295 {
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296 /* Check arguments */
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297 CHECK_STRING (data_type);
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298
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299 if (NILP (device))
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300 device = Fselected_device (Qnil);
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301
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302 if (HAS_DEVMETH_P (XDEVICE (device), register_selection_data_type))
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303 return DEVMETH (XDEVICE (device), register_selection_data_type,
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304 (data_type));
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305 else
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306 return Qnil;
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307 }
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308
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309 DEFUN ("selection-data-type-name", Fselection_data_type_name, 1, 2, 0, /*
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310 Retrieve the name of the specified selection data type DATA-TYPE, optionally
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311 on the specified DEVICE. Returns either a string or a symbol on success, and
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312 nil if the device does not support this feature or the type is not known. */
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313 (data_type, device))
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314 {
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315 if (NILP (device))
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316 device = Fselected_device (Qnil);
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317
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318 if (HAS_DEVMETH_P (XDEVICE (device), selection_data_type_name))
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319 return DEVMETH (XDEVICE (device), selection_data_type_name, (data_type));
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320 else
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321 return Qnil;
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322 }
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323
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324 DEFUN ("available-selection-types", Favailable_selection_types, 1, 2, 0, /*
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325 Retrieve a list of currently available types of selection associated with
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326 the given SELECTION-NAME, optionally on the specified DEVICE. This list
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327 does not take into account any possible conversions that might take place,
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328 so it should be taken as a minimal estimate of what is available.
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329 */
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330 (selection_name, device))
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331 {
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332 Lisp_Object types = Qnil, rest;
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333 struct gcpro gcpro1;
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334
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335 CHECK_SYMBOL (selection_name);
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336
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337 if (NILP (device))
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338 device = Fselected_device (Qnil);
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339
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340 GCPRO1 (types);
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341
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342 /* First check the device */
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343 if (HAS_DEVMETH_P (XDEVICE (device), available_selection_types))
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344 types = DEVMETH (XDEVICE (device), available_selection_types,
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345 (selection_name));
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346
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347 /* Now look in the list */
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348 rest = assq_no_quit (selection_name, Vselection_alist);
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349
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350 if (NILP (rest))
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351 {
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352 UNGCPRO;
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353
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354 return types;
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355 }
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356
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357 /* Examine the types and cons them onto the front of the list */
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358 for (rest = XCAR (XCDR (rest)); !NILP (rest); rest = XCDR (rest))
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359 {
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360 Lisp_Object value = XCDR (XCAR (rest));
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361 Lisp_Object type = XCAR (XCAR (rest));
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362
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363 types = Fcons (type, types);
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364
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365 if ((STRINGP (value) || EXTENTP (value))
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366 && (NILP (type) || EQ (type, QSTRING)
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367 || EQ (type, QTEXT) || EQ (type, QCOMPOUND_TEXT)))
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368 types = Fcons (QTEXT, Fcons (QCOMPOUND_TEXT, Fcons (QSTRING, types)));
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369 else if (INTP (value) && NILP (type))
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370 types = Fcons (QINTEGER, types);
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371 else if (SYMBOLP (value) && NILP (type))
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372 types = Fcons (QATOM, types);
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373 }
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374
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375 UNGCPRO;
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376
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377 return types;
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378 }
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379
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398
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380 /* remove a selection from our local copy
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381 */
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382 void
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383 handle_selection_clear (Lisp_Object selection_symbol)
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384 {
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410
|
385 Lisp_Object local_selection_data = assq_no_quit (selection_symbol,
|
|
|
386 Vselection_alist);
|
|
398
|
387
|
|
|
388 /* Well, we already believe that we don't own it, so that's just fine. */
|
|
|
389 if (NILP (local_selection_data)) return;
|
|
|
390
|
|
|
391 /* Otherwise, we're really honest and truly being told to drop it.
|
|
|
392 Don't use Fdelq() as that may QUIT;.
|
|
|
393 */
|
|
|
394 if (EQ (local_selection_data, Fcar (Vselection_alist)))
|
|
|
395 Vselection_alist = Fcdr (Vselection_alist);
|
|
|
396 else
|
|
|
397 {
|
|
|
398 Lisp_Object rest;
|
|
|
399 for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest))
|
|
|
400 if (EQ (local_selection_data, Fcar (XCDR (rest))))
|
|
|
401 {
|
|
|
402 XCDR (rest) = Fcdr (XCDR (rest));
|
|
|
403 break;
|
|
|
404 }
|
|
|
405 }
|
|
|
406
|
|
|
407 /* Let random lisp code notice that the selection has been stolen.
|
|
|
408 */
|
|
|
409 {
|
|
|
410 Lisp_Object rest;
|
|
|
411 Lisp_Object val = Vlost_selection_hooks;
|
|
|
412 if (!UNBOUNDP (val) && !NILP (val))
|
|
|
413 {
|
|
|
414 if (CONSP (val) && !EQ (XCAR (val), Qlambda))
|
|
|
415 for (rest = val; !NILP (rest); rest = Fcdr (rest))
|
|
|
416 call1 (Fcar (rest), selection_symbol);
|
|
|
417 else
|
|
|
418 call1 (val, selection_symbol);
|
|
|
419 }
|
|
|
420 }
|
|
|
421 }
|
|
|
422
|
|
|
423 DEFUN ("disown-selection-internal", Fdisown_selection_internal, 1, 3, 0, /*
|
|
|
424 If we own the named selection, then disown it (make there be no selection).
|
|
|
425 */
|
|
|
426 (selection_name, selection_time, device))
|
|
|
427 {
|
|
|
428 if (NILP (assq_no_quit (selection_name, Vselection_alist)))
|
|
|
429 return Qnil; /* Don't disown the selection when we're not the owner. */
|
|
|
430
|
|
|
431 if (NILP (device))
|
|
|
432 device = Fselected_device (Qnil);
|
|
|
433
|
|
|
434 MAYBE_DEVMETH (XDEVICE (device), disown_selection,
|
|
|
435 (selection_name, selection_time));
|
|
|
436
|
|
|
437 handle_selection_clear (selection_name);
|
|
|
438
|
|
|
439 return Qt;
|
|
|
440 }
|
|
|
441
|
|
|
442 DEFUN ("selection-owner-p", Fselection_owner_p, 0, 1, 0, /*
|
|
|
443 Return t if current emacs process owns the given Selection.
|
|
|
444 The arg should be the name of the selection in question, typically one of
|
|
|
445 the symbols PRIMARY, SECONDARY, or CLIPBOARD. (For convenience, the symbol
|
|
|
446 nil is the same as PRIMARY, and t is the same as SECONDARY.)
|
|
|
447 */
|
|
|
448 (selection))
|
|
|
449 {
|
|
|
450 CHECK_SYMBOL (selection);
|
|
|
451 if (EQ (selection, Qnil)) selection = QPRIMARY;
|
|
|
452 else if (EQ (selection, Qt)) selection = QSECONDARY;
|
|
|
453
|
|
|
454 return NILP (Fassq (selection, Vselection_alist)) ? Qnil : Qt;
|
|
|
455 }
|
|
|
456
|
|
410
|
457 DEFUN ("selection-exists-p", Fselection_exists_p, 0, 3, 0, /*
|
|
398
|
458 Whether there is an owner for the given Selection.
|
|
|
459 The arg should be the name of the selection in question, typically one of
|
|
|
460 the symbols PRIMARY, SECONDARY, or CLIPBOARD. (For convenience, the symbol
|
|
|
461 nil is the same as PRIMARY, and t is the same as SECONDARY.)
|
|
410
|
462 Optionally the DEVICE and the window-system DATA-TYPE may be specified.
|
|
398
|
463 */
|
|
410
|
464 (selection, data_type, device))
|
|
398
|
465 {
|
|
|
466 CHECK_SYMBOL (selection);
|
|
410
|
467 if (NILP (data_type)
|
|
|
468 && !NILP (Fselection_owner_p (selection)))
|
|
398
|
469 return Qt;
|
|
|
470
|
|
|
471 if (NILP (device))
|
|
|
472 device = Fselected_device (Qnil);
|
|
|
473
|
|
|
474 return HAS_DEVMETH_P (XDEVICE (device), selection_exists_p) ?
|
|
410
|
475 DEVMETH (XDEVICE (device), selection_exists_p, (selection, data_type))
|
|
398
|
476 : Qnil;
|
|
|
477 }
|
|
|
478
|
|
410
|
479 /* Get the timestamp of the given selection */
|
|
|
480 DEFUN ("get-selection-timestamp", Fget_selection_timestamp, 1, 1, 0, /*
|
|
|
481 Return the timestamp associated with the specified SELECTION, if it exists.
|
|
|
482 Note that the timestamp is a device-specific object, and may not actually be
|
|
|
483 visible from Lisp.
|
|
|
484 */
|
|
|
485 (selection))
|
|
|
486 {
|
|
|
487 Lisp_Object local_value = assq_no_quit (selection, Vselection_alist);
|
|
|
488
|
|
|
489 if (!NILP (local_value))
|
|
|
490 return XCAR (XCDR (XCDR (local_value)));
|
|
|
491
|
|
|
492 return Qnil;
|
|
|
493 }
|
|
|
494
|
|
398
|
495 /* Request the selection value from the owner. If we are the owner,
|
|
|
496 simply return our selection value. If we are not the owner, this
|
|
|
497 will block until all of the data has arrived.
|
|
|
498 */
|
|
|
499 DEFUN ("get-selection-internal", Fget_selection_internal, 2, 3, 0, /*
|
|
|
500 Return text selected from some window-system window.
|
|
|
501 SELECTION_SYMBOL is a symbol, typically PRIMARY, SECONDARY, or CLIPBOARD.
|
|
|
502 TARGET_TYPE is the type of data desired, typically STRING or COMPOUND_TEXT.
|
|
|
503 Under Mule, if the resultant data comes back as 8-bit data in type
|
|
|
504 TEXT or COMPOUND_TEXT, it will be decoded as Compound Text.
|
|
|
505 */
|
|
|
506 (selection_symbol, target_type, device))
|
|
|
507 {
|
|
|
508 /* This function can GC */
|
|
410
|
509 Lisp_Object val = Qnil, element = Qnil;
|
|
|
510 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
511 GCPRO3 (target_type, val, element);
|
|
398
|
512 CHECK_SYMBOL (selection_symbol);
|
|
|
513
|
|
|
514 if (NILP (device))
|
|
|
515 device = Fselected_device (Qnil);
|
|
|
516
|
|
410
|
517 #ifdef MULE
|
|
|
518 if (NILP (target_type))
|
|
|
519 target_type = QCOMPOUND_TEXT;
|
|
|
520 #else
|
|
|
521 if (NILP (target_type))
|
|
|
522 target_type = QSTRING;
|
|
|
523 #endif
|
|
|
524
|
|
398
|
525 #if 0 /* #### MULTIPLE doesn't work yet and probably never will */
|
|
|
526 if (CONSP (target_type) &&
|
|
|
527 XCAR (target_type) == QMULTIPLE)
|
|
|
528 {
|
|
|
529 CHECK_VECTOR (XCDR (target_type));
|
|
|
530 /* So we don't destructively modify this... */
|
|
|
531 target_type = copy_multiple_data (target_type);
|
|
|
532 }
|
|
|
533 #endif
|
|
410
|
534
|
|
|
535 /* Used to check that target_type was a symbol. This is no longer
|
|
|
536 necessarily the case, because the type might be registered with
|
|
|
537 the device (in which case target_type would be a device-specific
|
|
|
538 identifier - probably an integer) - ajh */
|
|
398
|
539
|
|
|
540 val = get_local_selection (selection_symbol, target_type);
|
|
|
541
|
|
|
542 if (NILP (val) && (HAS_DEVMETH_P (XDEVICE (device), get_foreign_selection)))
|
|
|
543 {
|
|
|
544 val = DEVMETH (XDEVICE (device), get_foreign_selection,
|
|
|
545 (selection_symbol, target_type));
|
|
|
546 }
|
|
410
|
547
|
|
|
548 if (NILP (val))
|
|
398
|
549 {
|
|
410
|
550 /* Still nothing. Try coercion. */
|
|
|
551
|
|
|
552 /* Try looking in selection-coercible-types to see if any of
|
|
|
553 them are present for this selection. We try them *in order*;
|
|
|
554 the first for which a conversion succeeds gets returned. */
|
|
|
555 EXTERNAL_LIST_LOOP_2 (element, Vselection_coercible_types)
|
|
398
|
556 {
|
|
410
|
557 val = get_local_selection (selection_symbol, element);
|
|
|
558
|
|
|
559 if (NILP (val))
|
|
|
560 continue;
|
|
|
561
|
|
|
562 /* #### Probably should have a Qselection_coercion_alist and a
|
|
|
563 select-coerce function. */
|
|
|
564 val = call3 (Qselect_convert_out,
|
|
|
565 selection_symbol, target_type, val);
|
|
|
566
|
|
|
567 if (!NILP (val))
|
|
|
568 break;
|
|
398
|
569 }
|
|
|
570 }
|
|
410
|
571
|
|
|
572 if (NILP (val))
|
|
|
573 {
|
|
|
574 UNGCPRO;
|
|
|
575
|
|
|
576 return Qnil;
|
|
|
577 }
|
|
|
578
|
|
|
579 /* Used to call clean_local_selection here... but that really belonged
|
|
|
580 in Lisp (so the equivalent is now built-in to the INTEGER conversion
|
|
|
581 function select-convert-from-integer) - ajh */
|
|
|
582
|
|
398
|
583 UNGCPRO;
|
|
|
584 return val;
|
|
|
585 }
|
|
|
586
|
|
410
|
587 /* These two are convenient interfaces to the lisp code in select.el;
|
|
|
588 this way we can rename them easily rather than having to hunt everywhere.
|
|
|
589 Also, this gives us access to get_local_selection so that convert_out
|
|
|
590 can retrieve the internal selection value automatically if passed a
|
|
|
591 value of Qnil. */
|
|
|
592 Lisp_Object
|
|
|
593 select_convert_in (Lisp_Object selection,
|
|
|
594 Lisp_Object type,
|
|
|
595 Lisp_Object value)
|
|
|
596 {
|
|
|
597 return call3 (Qselect_convert_in, selection, type, value);
|
|
|
598 }
|
|
|
599
|
|
|
600 Lisp_Object
|
|
|
601 select_convert_out (Lisp_Object selection,
|
|
|
602 Lisp_Object type,
|
|
|
603 Lisp_Object value)
|
|
|
604 {
|
|
|
605 if (NILP (value))
|
|
|
606 value = get_local_selection (selection, type);
|
|
|
607
|
|
|
608 if (NILP (value))
|
|
|
609 {
|
|
|
610 Lisp_Object element = Qnil, ret;
|
|
|
611 struct gcpro gcpro1;
|
|
|
612 GCPRO1 (element);
|
|
|
613
|
|
|
614 {
|
|
|
615 /* Try looking in selection-coercible-types to see if any of
|
|
|
616 them are present for this selection. We try them *in order*;
|
|
|
617 the first for which a conversion succeeds gets returned. */
|
|
|
618 EXTERNAL_LIST_LOOP_2 (element, Vselection_coercible_types)
|
|
|
619 {
|
|
|
620 value = get_local_selection (selection, element);
|
|
|
621
|
|
|
622 if (NILP (value))
|
|
|
623 continue;
|
|
|
624
|
|
|
625 ret = call3 (Qselect_convert_out, selection, type, value);
|
|
|
626
|
|
|
627 if (!NILP (ret))
|
|
|
628 {
|
|
|
629 UNGCPRO;
|
|
|
630
|
|
|
631 return ret;
|
|
|
632 }
|
|
|
633 }
|
|
|
634 }
|
|
|
635
|
|
|
636 UNGCPRO;
|
|
|
637
|
|
|
638 return Qnil;
|
|
|
639 }
|
|
|
640
|
|
|
641 return call3 (Qselect_convert_out, selection, type, value);
|
|
|
642 }
|
|
|
643
|
|
|
644
|
|
|
645 /* Gets called from kill-buffer; this lets us dispose of buffer-dependent
|
|
|
646 selections (or alternatively make them independent of the buffer) when
|
|
|
647 it gets vaped. */
|
|
|
648 void
|
|
|
649 select_notify_buffer_kill (Lisp_Object buffer)
|
|
|
650 {
|
|
|
651 Lisp_Object rest;
|
|
|
652 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
653
|
|
|
654 /* For each element of Vselection_alist */
|
|
|
655 for (rest = Vselection_alist;
|
|
|
656 !NILP (rest);)
|
|
|
657 {
|
|
|
658 Lisp_Object selection, values, prev = Qnil;
|
|
|
659
|
|
|
660 selection = XCAR (rest);
|
|
|
661
|
|
|
662 for (values = XCAR (XCDR (selection));
|
|
|
663 !NILP (values);
|
|
|
664 values = XCDR (values))
|
|
|
665 {
|
|
|
666 Lisp_Object value, handler_fn;
|
|
|
667
|
|
|
668 /* Extract the (type . value) pair. */
|
|
|
669 value = XCAR (values);
|
|
|
670
|
|
|
671 /* Find the handler function (if any). */
|
|
|
672 handler_fn = Fcdr (Fassq (XCAR (value),
|
|
|
673 Vselection_buffer_killed_alist));
|
|
|
674
|
|
|
675 if (!NILP (handler_fn))
|
|
|
676 {
|
|
|
677 Lisp_Object newval;
|
|
|
678
|
|
|
679 /* Protect ourselves, just in case some tomfool calls
|
|
|
680 own-selection from with the buffer-killed handler, then
|
|
|
681 causes a GC. Just as a note, *don't do this*. */
|
|
|
682 GCPRO3 (rest, values, value);
|
|
|
683
|
|
|
684 newval = call4 (handler_fn, XCAR (selection), XCAR (value),
|
|
|
685 XCDR (value), buffer);
|
|
|
686
|
|
|
687 UNGCPRO;
|
|
|
688
|
|
|
689 /* Set or delete the value (by destructively modifying
|
|
|
690 the list). */
|
|
|
691 if (!NILP (newval))
|
|
|
692 {
|
|
|
693 Fsetcdr (value, newval);
|
|
|
694
|
|
|
695 prev = values;
|
|
|
696 }
|
|
|
697 else
|
|
|
698 {
|
|
|
699 if (NILP (prev))
|
|
|
700 Fsetcar (XCDR (selection), XCDR (values));
|
|
|
701 else
|
|
|
702 Fsetcdr (prev, XCDR (values));
|
|
|
703 }
|
|
|
704 }
|
|
|
705 else
|
|
|
706 prev = values;
|
|
|
707 }
|
|
|
708
|
|
|
709 /* If we have no values for this selection */
|
|
|
710 if (NILP (XCAR (XCDR (selection))))
|
|
|
711 {
|
|
|
712 /* Move on to the next element *first* */
|
|
|
713 rest = XCDR (rest);
|
|
|
714
|
|
|
715 /* Protect it and disown this selection */
|
|
|
716 GCPRO1 (rest);
|
|
|
717
|
|
|
718 Fdisown_selection_internal (XCAR (selection), Qnil, Qnil);
|
|
|
719
|
|
|
720 UNGCPRO;
|
|
|
721 }
|
|
|
722 else
|
|
|
723 rest = XCDR (rest);
|
|
|
724 }
|
|
|
725 }
|
|
|
726
|
|
|
727
|
|
398
|
728 void
|
|
|
729 syms_of_select (void)
|
|
|
730 {
|
|
|
731 DEFSUBR (Fown_selection_internal);
|
|
|
732 DEFSUBR (Fget_selection_internal);
|
|
|
733 DEFSUBR (Fselection_exists_p);
|
|
410
|
734 DEFSUBR (Fget_selection_timestamp);
|
|
398
|
735 DEFSUBR (Fdisown_selection_internal);
|
|
|
736 DEFSUBR (Fselection_owner_p);
|
|
410
|
737 DEFSUBR (Favailable_selection_types);
|
|
|
738 DEFSUBR (Fregister_selection_data_type);
|
|
|
739 DEFSUBR (Fselection_data_type_name);
|
|
|
740
|
|
|
741 /* Lisp Functions */
|
|
|
742 defsymbol (&Qselect_convert_in, "select-convert-in");
|
|
|
743 defsymbol (&Qselect_convert_out, "select-convert-out");
|
|
398
|
744
|
|
410
|
745 /* X Atoms */
|
|
398
|
746 defsymbol (&QPRIMARY, "PRIMARY");
|
|
|
747 defsymbol (&QSECONDARY, "SECONDARY");
|
|
|
748 defsymbol (&QSTRING, "STRING");
|
|
|
749 defsymbol (&QINTEGER, "INTEGER");
|
|
|
750 defsymbol (&QCLIPBOARD, "CLIPBOARD");
|
|
|
751 defsymbol (&QTIMESTAMP, "TIMESTAMP");
|
|
|
752 defsymbol (&QTEXT, "TEXT");
|
|
|
753 defsymbol (&QDELETE, "DELETE");
|
|
|
754 defsymbol (&QMULTIPLE, "MULTIPLE");
|
|
|
755 defsymbol (&QINCR, "INCR");
|
|
|
756 defsymbol (&QEMACS_TMP, "_EMACS_TMP_");
|
|
|
757 defsymbol (&QTARGETS, "TARGETS");
|
|
|
758 defsymbol (&QATOM, "ATOM");
|
|
|
759 defsymbol (&QATOM_PAIR, "ATOM_PAIR");
|
|
|
760 defsymbol (&QCOMPOUND_TEXT, "COMPOUND_TEXT");
|
|
|
761 defsymbol (&QNULL, "NULL");
|
|
|
762
|
|
410
|
763 /* Windows formats - these all start with CF_ */
|
|
|
764 defsymbol (&QCF_TEXT, "CF_TEXT");
|
|
|
765 defsymbol (&QCF_BITMAP, "CF_BITMAP");
|
|
|
766 defsymbol (&QCF_METAFILEPICT, "CF_METAFILEPICT");
|
|
|
767 defsymbol (&QCF_SYLK, "CF_SYLK");
|
|
|
768 defsymbol (&QCF_DIF, "CF_DIF");
|
|
|
769 defsymbol (&QCF_TIFF, "CF_TIFF");
|
|
|
770 defsymbol (&QCF_OEMTEXT, "CF_OEMTEXT");
|
|
|
771 defsymbol (&QCF_DIB, "CF_DIB");
|
|
|
772 defsymbol (&QCF_PALETTE, "CF_PALETTE");
|
|
|
773 defsymbol (&QCF_PENDATA, "CF_PENDATA");
|
|
|
774 defsymbol (&QCF_RIFF, "CF_RIFF");
|
|
|
775 defsymbol (&QCF_WAVE, "CF_WAVE");
|
|
|
776 defsymbol (&QCF_UNICODETEXT, "CF_UNICODETEXT");
|
|
|
777 defsymbol (&QCF_ENHMETAFILE, "CF_ENHMETAFILE");
|
|
|
778 defsymbol (&QCF_HDROP, "CF_HDROP");
|
|
|
779 defsymbol (&QCF_LOCALE, "CF_LOCALE");
|
|
|
780 defsymbol (&QCF_OWNERDISPLAY, "CF_OWNERDISPLAY");
|
|
|
781 defsymbol (&QCF_DSPTEXT, "CF_DSPTEXT");
|
|
|
782 defsymbol (&QCF_DSPBITMAP, "CF_DSPBITMAP");
|
|
|
783 defsymbol (&QCF_DSPMETAFILEPICT, "CF_DSPMETAFILEPICT");
|
|
|
784 defsymbol (&QCF_DSPENHMETAFILE, "CF_DSPENHMETAFILE");
|
|
|
785
|
|
|
786 /* Selection strategies */
|
|
|
787 defsymbol (&Qreplace_all, "replace-all");
|
|
|
788 defsymbol (&Qreplace_existing, "replace-existing");
|
|
|
789
|
|
398
|
790 deferror (&Qselection_conversion_error,
|
|
|
791 "selection-conversion-error",
|
|
|
792 "selection-conversion error", Qio_error);
|
|
|
793 }
|
|
|
794
|
|
|
795 void
|
|
|
796 vars_of_select (void)
|
|
|
797 {
|
|
|
798 Vselection_alist = Qnil;
|
|
|
799 staticpro (&Vselection_alist);
|
|
|
800
|
|
410
|
801 DEFVAR_LISP ("selection-converter-alist", &Vselection_converter_out_alist /*
|
|
|
802 An alist associating selection-types (such as STRING and TIMESTAMP) with
|
|
|
803 functions. This is an alias for `selection-converter-out-alist', and should
|
|
|
804 be considered obsolete. Use the new name instead. */ );
|
|
|
805
|
|
|
806 DEFVAR_LISP ("selection-converter-out-alist",
|
|
|
807 &Vselection_converter_out_alist /*
|
|
398
|
808 An alist associating selection-types (such as STRING and TIMESTAMP) with
|
|
|
809 functions. These functions will be called with three args: the name
|
|
|
810 of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD); a
|
|
|
811 desired type to which the selection should be converted; and the local
|
|
410
|
812 selection value (whatever had been passed to `own-selection').
|
|
|
813
|
|
|
814 The return type of these functions depends upon the device in question;
|
|
|
815 for mswindows, a string should be returned containing data in the requested
|
|
|
816 format, or nil to indicate that the conversion could not be done. Additionally,
|
|
|
817 it is permissible to return a cons of the form (DATA-TYPE . STRING) suggesting
|
|
|
818 a new data type to use instead.
|
|
|
819
|
|
|
820 For X, the return value should be one of:
|
|
398
|
821
|
|
|
822 -- nil (the conversion could not be done)
|
|
|
823 -- a cons of a symbol and any of the following values; the symbol
|
|
|
824 explicitly specifies the type that will be sent.
|
|
|
825 -- a string (If the type is not specified, then if Mule support exists,
|
|
|
826 the string will be converted to Compound Text and sent in
|
|
|
827 the 'COMPOUND_TEXT format; otherwise (no Mule support),
|
|
|
828 the string will be left as-is and sent in the 'STRING
|
|
|
829 format. If the type is specified, the string will be
|
|
|
830 left as-is (or converted to binary format under Mule).
|
|
|
831 In all cases, 8-bit data it sent.)
|
|
|
832 -- a character (With Mule support, will be converted to Compound Text
|
|
|
833 whether or not a type is specified. If a type is not
|
|
|
834 specified, a type of 'STRING or 'COMPOUND_TEXT will be
|
|
|
835 sent, as for strings.)
|
|
|
836 -- the symbol 'NULL (Indicates that there is no meaningful return value.
|
|
|
837 Empty 32-bit data with a type of 'NULL will be sent.)
|
|
|
838 -- a symbol (Will be converted into an atom. If the type is not specified,
|
|
|
839 a type of 'ATOM will be sent.)
|
|
|
840 -- an integer (Will be converted into a 16-bit or 32-bit integer depending
|
|
|
841 on the value. If the type is not specified, a type of
|
|
|
842 'INTEGER will be sent.)
|
|
|
843 -- a cons (HIGH . LOW) of integers (Will be converted into a 32-bit integer.
|
|
|
844 If the type is not specified, a type of
|
|
|
845 'INTEGER will be sent.)
|
|
|
846 -- a vector of symbols (Will be converted into a list of atoms. If the type
|
|
|
847 is not specified, a type of 'ATOM will be sent.)
|
|
|
848 -- a vector of integers (Will be converted into a list of 16-bit integers.
|
|
|
849 If the type is not specified, a type of 'INTEGER
|
|
|
850 will be sent.)
|
|
|
851 -- a vector of integers and/or conses (HIGH . LOW) of integers
|
|
|
852 (Will be converted into a list of 16-bit integers.
|
|
|
853 If the type is not specified, a type of 'INTEGER
|
|
410
|
854 will be sent.)
|
|
|
855 */ );
|
|
|
856 Vselection_converter_out_alist = Qnil;
|
|
|
857
|
|
|
858 DEFVAR_LISP ("selection-converter-in-alist",
|
|
|
859 &Vselection_converter_in_alist /*
|
|
|
860 An alist associating selection-types (such as STRING and TIMESTAMP) with
|
|
|
861 functions. These functions will be called with three args: the name
|
|
|
862 of the selection (typically PRIMARY, SECONDARY or CLIPBOARD); the
|
|
|
863 type from which the selection should be converted; and the selection
|
|
|
864 value. These functions should return a suitable representation of the
|
|
|
865 value, or nil to indicate that the conversion was not possible.
|
|
|
866
|
|
|
867 See also `selection-converter-out-alist'. */ );
|
|
|
868 Vselection_converter_in_alist = Qnil;
|
|
398
|
869
|
|
410
|
870 DEFVAR_LISP ("selection-appender-alist",
|
|
|
871 &Vselection_appender_alist /*
|
|
|
872 An alist associating selection-types (such as STRING and TIMESTAMP) with
|
|
|
873 functions. These functions will be called with four args; the name
|
|
|
874 of the selection (typically PRIMARY, SECONDARY or CLIPBOARD); the type
|
|
|
875 of the selection; and two selection values. The functions are expected to
|
|
|
876 return a value representing the catenation of the two values, or nil to
|
|
|
877 indicate that this was not possible. */ );
|
|
|
878 Vselection_appender_alist = Qnil;
|
|
|
879
|
|
|
880 DEFVAR_LISP ("selection-buffer-killed-alist",
|
|
|
881 &Vselection_buffer_killed_alist /*
|
|
|
882 An alist associating selection-types (such as STRING and TIMESTAMP) with
|
|
|
883 functions. These functions will be called whenever a buffer is killed,
|
|
|
884 with four args: the name of the selection (typically PRIMARY, SECONDARY
|
|
|
885 or CLIPBOARD); the type of the selection; the value of the selection; and
|
|
|
886 the buffer that has just been killed. These functions should return a new
|
|
|
887 selection value, or nil to indicate that the selection value should be
|
|
|
888 deleted. */ );
|
|
|
889 Vselection_buffer_killed_alist = Qnil;
|
|
|
890
|
|
|
891 DEFVAR_LISP ("selection-coercible-types",
|
|
|
892 &Vselection_coercible_types /*
|
|
|
893 A list of selection types that are coercible---that is, types that may be
|
|
|
894 automatically converted to another type. Selection values with types in this
|
|
|
895 list may be subject to conversion attempts to other types. */ );
|
|
|
896 Vselection_coercible_types = Qnil;
|
|
|
897
|
|
398
|
898 DEFVAR_LISP ("lost-selection-hooks", &Vlost_selection_hooks /*
|
|
|
899 A function or functions to be called after we have been notified
|
|
|
900 that we have lost the selection. The function(s) will be called with one
|
|
|
901 argument, a symbol naming the selection (typically PRIMARY, SECONDARY, or
|
|
|
902 CLIPBOARD).
|
|
|
903 */ );
|
|
|
904 Vlost_selection_hooks = Qunbound;
|
|
|
905 }
|
