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462
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1 /* GTK selection processing for XEmacs
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2 Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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771
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3 Copyright (C) 2001 Ben Wing.
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462
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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 /* Authorship:
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25
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26 Written by Kevin Gallo for FSF Emacs.
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27 Rewritten for mswindows by Jonathan Harris, December 1997 for 21.0.
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28 Rewritten for GTK by William Perry, April 2000 for 21.1
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29 */
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30
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31
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32 #include <config.h>
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33 #include "lisp.h"
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872
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34
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462
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35 #include "buffer.h"
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872
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36 #include "device-impl.h"
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37 #include "events.h"
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38 #include "frame.h"
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39 #include "opaque.h"
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462
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40 #include "select.h"
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872
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41
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42 #include "console-gtk-impl.h"
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462
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43
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44 static Lisp_Object Vretrieved_selection;
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45 static gboolean waiting_for_selection;
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46 Lisp_Object Vgtk_sent_selection_hooks;
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47
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778
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48 extern int lisp_to_time (Lisp_Object, time_t *);
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49 extern Lisp_Object time_to_lisp (time_t);
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50
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647
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51 static GdkAtom
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2286
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52 symbol_to_gtk_atom (struct device *UNUSED (d), Lisp_Object sym,
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53 int only_if_exists)
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647
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54 {
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55 if (NILP (sym)) return GDK_SELECTION_PRIMARY;
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56 if (EQ (sym, Qt)) return GDK_SELECTION_SECONDARY;
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57 if (EQ (sym, QPRIMARY)) return GDK_SELECTION_PRIMARY;
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58 if (EQ (sym, QSECONDARY)) return GDK_SELECTION_SECONDARY;
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59
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60 {
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61 const Extbyte *nameext;
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62 LISP_STRING_TO_EXTERNAL (Fsymbol_name (sym), nameext, Qctext);
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63 return gdk_atom_intern (nameext, only_if_exists ? TRUE : FALSE);
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64 }
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65 }
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462
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66
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647
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67 static Lisp_Object
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2286
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68 atom_to_symbol (struct device *UNUSED (d), GdkAtom atom)
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647
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69 {
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70 if (atom == GDK_SELECTION_PRIMARY) return (QPRIMARY);
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71 if (atom == GDK_SELECTION_SECONDARY) return (QSECONDARY);
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72
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73 {
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867
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74 Ibyte *intstr;
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647
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75 Extbyte *str = gdk_atom_name (atom);
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76
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77 if (! str) return Qnil;
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462
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78
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771
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79 EXTERNAL_TO_C_STRING (str, intstr, Qctext);
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647
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80 g_free (str);
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771
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81 return intern_int (intstr);
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647
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82 }
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83 }
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84
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85 #define PROCESSING_GTK_CODE
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86 #include "select-common.h"
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87 #undef PROCESSING_GTK_CODE
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88
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89
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462
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90 /* Set the selection data to GDK_NONE and NULL data, meaning we were
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91 ** unable to do what they wanted.
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92 */
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93 static void
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94 gtk_decline_selection_request (GtkSelectionData *data)
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95 {
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96 gtk_selection_data_set (data, GDK_NONE, 0, NULL, 0);
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97 }
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98
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99 /* Used as an unwind-protect clause so that, if a selection-converter signals
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100 an error, we tell the requestor that we were unable to do what they wanted
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101 before we throw to top-level or go into the debugger or whatever.
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102 */
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103 struct _selection_closure
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104 {
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105 GtkSelectionData *data;
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106 gboolean successful;
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107 };
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108
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109 static Lisp_Object
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110 gtk_selection_request_lisp_error (Lisp_Object closure)
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111 {
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112 struct _selection_closure *cl = (struct _selection_closure *)
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113 get_opaque_ptr (closure);
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114
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115 free_opaque_ptr (closure);
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116 if (cl->successful == TRUE)
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117 return Qnil;
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118 gtk_decline_selection_request (cl->data);
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119 return Qnil;
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120 }
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121
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122 /* This provides the current selection to a requester.
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123 **
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124 ** This is connected to the selection_get() signal of the application
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125 ** shell in device-gtk.c:gtk_init_device().
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126 **
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127 ** This is radically different than the old selection code (21.1.x),
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128 ** but has been modeled after the X code, and appears to work.
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129 **
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130 ** WMP Feb 12 2001
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131 */
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132 void
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2286
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133 emacs_gtk_selection_handle (GtkWidget *UNUSED (widget),
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462
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134 GtkSelectionData *selection_data,
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2286
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135 guint UNUSED (info),
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462
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136 guint time_stamp,
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2286
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137 gpointer UNUSED (data))
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462
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138 {
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139 /* This function can GC */
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140 struct gcpro gcpro1, gcpro2;
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141 Lisp_Object temp_obj;
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142 Lisp_Object selection_symbol;
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143 Lisp_Object target_symbol = Qnil;
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144 Lisp_Object converted_selection = Qnil;
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145 guint32 local_selection_time;
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146 Lisp_Object successful_p = Qnil;
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147 int count;
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148 struct device *d = decode_gtk_device (Qnil);
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149 struct _selection_closure *cl = NULL;
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150
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151 GCPRO2 (converted_selection, target_symbol);
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152
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153 selection_symbol = atom_to_symbol (d, selection_data->selection);
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154 target_symbol = atom_to_symbol (d, selection_data->target);
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155
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156 #if 0 /* #### MULTIPLE doesn't work yet */
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157 if (EQ (target_symbol, QMULTIPLE))
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158 target_symbol = fetch_multiple_target (selection_data);
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159 #endif
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160
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2620
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161 temp_obj = get_selection_raw_time(selection_symbol);
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462
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162
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163 if (NILP (temp_obj))
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164 {
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165 /* We don't appear to have the selection. */
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166 gtk_decline_selection_request (selection_data);
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167
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168 goto DONE_LABEL;
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169 }
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170
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171 local_selection_time = * (guint32 *) XOPAQUE_DATA (temp_obj);
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172
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173 if (time_stamp != GDK_CURRENT_TIME &&
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174 local_selection_time > time_stamp)
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175 {
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176 /* Someone asked for the selection, and we have one, but not the one
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177 they're looking for. */
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178 gtk_decline_selection_request (selection_data);
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179 goto DONE_LABEL;
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180 }
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181
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182 converted_selection = select_convert_out (selection_symbol,
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183 target_symbol, Qnil);
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184
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185 /* #### Is this the right thing to do? I'm no X expert. -- ajh */
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186 if (NILP (converted_selection))
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187 {
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188 /* We don't appear to have a selection in that data type. */
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189 gtk_decline_selection_request (selection_data);
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190 goto DONE_LABEL;
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191 }
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192
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193 count = specpdl_depth ();
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194
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2367
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195 cl = xnew (struct _selection_closure);
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462
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196 cl->data = selection_data;
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197 cl->successful = FALSE;
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198
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199 record_unwind_protect (gtk_selection_request_lisp_error,
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200 make_opaque_ptr (cl));
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201
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202 {
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2367
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203 Rawbyte *data;
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665
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204 Bytecount size;
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462
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205 int format;
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206 GdkAtom type;
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207 lisp_data_to_selection_data (d, converted_selection,
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208 &data, &type, &size, &format);
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209
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647
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210 gtk_selection_data_set (selection_data, type, format, data,
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211 /* #### is this right? */
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212 (unsigned int) size);
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462
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213 successful_p = Qt;
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214 /* Tell x_selection_request_lisp_error() it's cool. */
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215 cl->successful = TRUE;
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2367
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216 xfree (data, Rawbyte *);
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462
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217 }
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218
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771
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219 unbind_to (count);
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462
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220
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221 DONE_LABEL:
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222
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1726
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223 if (cl)
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224 xfree (cl, struct _selection_closure *);
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462
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225
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226 UNGCPRO;
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227
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228 /* Let random lisp code notice that the selection has been asked for. */
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229 {
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230 Lisp_Object val = Vgtk_sent_selection_hooks;
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231 if (!UNBOUNDP (val) && !NILP (val))
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232 {
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233 Lisp_Object rest;
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234 if (CONSP (val) && !EQ (XCAR (val), Qlambda))
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235 for (rest = val; !NILP (rest); rest = Fcdr (rest))
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236 call3 (Fcar (rest), selection_symbol, target_symbol, successful_p);
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237 else
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238 call3 (val, selection_symbol, target_symbol, successful_p);
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239 }
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240 }
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241 }
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242
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243
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746
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244 void
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2286
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245 emacs_gtk_selection_clear_event_handle (GtkWidget *UNUSED (widget),
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746
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246 GdkEventSelection *event,
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2286
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247 gpointer UNUSED (data))
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746
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248 {
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249 GdkAtom selection = event->selection;
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250 guint32 changed_owner_time = event->time;
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251 struct device *d = decode_gtk_device (Qnil);
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252
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253 Lisp_Object selection_symbol, local_selection_time_lisp;
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254 guint32 local_selection_time;
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255
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256 selection_symbol = atom_to_symbol (d, selection);
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257
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2620
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258 local_selection_time_lisp = get_selection_raw_time (selection_symbol);
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746
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259
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260 /* We don't own the selection, so that's fine. */
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261 if (NILP (local_selection_time_lisp))
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262 return;
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263
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264 local_selection_time = *(guint32 *) XOPAQUE_DATA (local_selection_time_lisp);
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265
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266 /* This SelectionClear is for a selection that we no longer own, so we can
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267 disregard it. (That is, we have reasserted the selection since this
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268 request was generated.)
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269 */
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270 if (changed_owner_time != GDK_CURRENT_TIME &&
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271 local_selection_time > changed_owner_time)
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272 return;
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273
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274 handle_selection_clear (selection_symbol);
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275 }
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276
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277
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462
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278
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279 static GtkWidget *reading_selection_reply;
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280 static GdkAtom reading_which_selection;
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281 static int selection_reply_timed_out;
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282
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283 /* Gets the current selection owned by another application */
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284 void
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2286
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285 emacs_gtk_selection_received (GtkWidget *UNUSED (widget),
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462
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286 GtkSelectionData *selection_data,
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2286
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287 gpointer UNUSED (user_data))
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462
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288 {
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289 waiting_for_selection = FALSE;
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290 Vretrieved_selection = Qnil;
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291
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292 reading_selection_reply = NULL;
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293
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294 signal_fake_event ();
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295
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296 if (selection_data->length < 0)
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297 {
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298 return;
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299 }
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300
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301 Vretrieved_selection =
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302 selection_data_to_lisp_data (NULL,
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303 selection_data->data,
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304 selection_data->length,
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305 selection_data->type,
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306 selection_data->format);
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307 }
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308
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309 static int
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2286
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310 selection_reply_done (void *UNUSED (ignore))
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462
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311 {
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312 return !reading_selection_reply;
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313 }
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314
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315 /* Do protocol to read selection-data from the server.
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316 Converts this to lisp data and returns it.
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317 */
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318 static Lisp_Object
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319 gtk_get_foreign_selection (Lisp_Object selection_symbol,
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320 Lisp_Object target_type)
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321 {
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322 /* This function can GC */
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323 struct device *d = decode_gtk_device (Qnil);
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324 GtkWidget *requestor = DEVICE_GTK_APP_SHELL (d);
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325 guint32 requestor_time = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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326 GdkAtom selection_atom = symbol_to_gtk_atom (d, selection_symbol, 0);
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327 int speccount;
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328 GdkAtom type_atom = symbol_to_gtk_atom (d, (CONSP (target_type) ?
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329 XCAR (target_type) : target_type), 0);
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330
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331 gtk_selection_convert (requestor, selection_atom, type_atom,
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332 requestor_time);
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333
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334 signal_fake_event ();
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335
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336 /* Block until the reply has been read. */
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337 reading_selection_reply = requestor;
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338 reading_which_selection = selection_atom;
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339 selection_reply_timed_out = 0;
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340
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341 speccount = specpdl_depth ();
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342
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343 #if 0
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344 /* add a timeout handler */
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345 if (gtk_selection_timeout > 0)
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346 {
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347 Lisp_Object id = Fadd_timeout (make_int (x_selection_timeout),
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348 Qx_selection_reply_timeout_internal,
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349 Qnil, Qnil);
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350 record_unwind_protect (Fdisable_timeout, id);
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351 }
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352 #endif
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353
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354 /* This is ^Gable */
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355 wait_delaying_user_input (selection_reply_done, 0);
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356
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357 if (selection_reply_timed_out)
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563
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358 signal_error (Qselection_conversion_error, "timed out waiting for reply from selection owner", Qunbound);
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462
|
359
|
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771
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360 unbind_to (speccount);
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462
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361
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362 /* otherwise, the selection is waiting for us on the requested property. */
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363 return select_convert_in (selection_symbol,
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364 target_type,
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365 Vretrieved_selection);
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366 }
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367
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368
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369 #if 0
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370 static void
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371 gtk_get_window_property (struct device *d, GtkWidget *window, GdkAtom property,
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|
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372 Extbyte **data_ret, int *bytes_ret,
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|
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373 GdkAtom *actual_type_ret, int *actual_format_ret,
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|
|
374 unsigned long *actual_size_ret, int delete_p)
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|
|
375 {
|
|
647
|
376 /* deleted */
|
|
462
|
377 }
|
|
|
378
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|
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379
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|
|
380 static void
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|
|
381 receive_incremental_selection (Display *display, Window window, Atom property,
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|
|
382 /* this one is for error messages only */
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|
|
383 Lisp_Object target_type,
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|
|
384 unsigned int min_size_bytes,
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|
|
385 Extbyte **data_ret, int *size_bytes_ret,
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|
|
386 Atom *type_ret, int *format_ret,
|
|
|
387 unsigned long *size_ret)
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|
|
388 {
|
|
647
|
389 /* deleted */
|
|
462
|
390 }
|
|
|
391
|
|
|
392
|
|
|
393 static Lisp_Object
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|
|
394 gtk_get_window_property_as_lisp_data (struct device *d,
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|
|
395 GtkWidget *window,
|
|
|
396 GdkAtom property,
|
|
|
397 /* next two for error messages only */
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|
|
398 Lisp_Object target_type,
|
|
|
399 GdkAtom selection_atom)
|
|
|
400 {
|
|
647
|
401 /* deleted */
|
|
462
|
402 }
|
|
|
403 #endif
|
|
|
404
|
|
|
405
|
|
|
406
|
|
|
407 static Lisp_Object
|
|
2286
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408 gtk_own_selection (Lisp_Object selection_name,
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409 Lisp_Object UNUSED (selection_value),
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410 Lisp_Object UNUSED (how_to_add),
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411 Lisp_Object UNUSED (selection_type), int UNUSED (owned_p))
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462
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412 {
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413 struct device *d = decode_gtk_device (Qnil);
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414 GtkWidget *selecting_window = GTK_WIDGET (DEVICE_GTK_APP_SHELL (d));
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415 /* Use the time of the last-read mouse or keyboard event.
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416 For selection purposes, we use this as a sleazy way of knowing what the
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417 current time is in server-time. This assumes that the most recently read
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418 mouse or keyboard event has something to do with the assertion of the
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419 selection, which is probably true.
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420 */
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421 guint32 thyme = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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422 GdkAtom selection_atom;
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423
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424 CHECK_SYMBOL (selection_name);
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425 selection_atom = symbol_to_gtk_atom (d, selection_name, 0);
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426
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427 gtk_selection_owner_set (selecting_window,
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428 selection_atom,
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429 thyme);
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430
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2620
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431 /* [[ We do NOT use time_to_lisp() here any more, like we used to.
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462
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432 That assumed equivalence of time_t and Time, which is not
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433 necessarily the case (e.g. under OSF on the Alphas, where
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434 Time is a 64-bit quantity and time_t is a 32-bit quantity).
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435
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2620
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436 Opaque pointers are the clean way to go here. ]]
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437
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438 See my comment on the same issue in select-x.c -- Aidan. */
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793
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439 return make_opaque (&thyme, sizeof (thyme));
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462
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440 }
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441
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442 static void
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443 gtk_disown_selection (Lisp_Object selection, Lisp_Object timeval)
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444 {
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445 struct device *d = decode_gtk_device (Qnil);
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446 GdkAtom selection_atom;
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447 guint32 timestamp;
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448
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449 CHECK_SYMBOL (selection);
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450 selection_atom = symbol_to_gtk_atom (d, selection, 0);
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451
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452 if (NILP (timeval))
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453 timestamp = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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454 else
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455 {
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456 time_t the_time;
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457 lisp_to_time (timeval, &the_time);
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458 timestamp = (guint32) the_time;
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459 }
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460
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461 gtk_selection_owner_set (NULL, selection_atom, timestamp);
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462 }
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463
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464 static Lisp_Object
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465 gtk_selection_exists_p (Lisp_Object selection,
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2286
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466 Lisp_Object UNUSED (selection_type))
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462
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467 {
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468 struct device *d = decode_gtk_device (Qnil);
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469
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470 return (gdk_selection_owner_get (symbol_to_gtk_atom (d, selection, 0)) ? Qt : Qnil);
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471 }
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472
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473
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474
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475 /************************************************************************/
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476 /* initialization */
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477 /************************************************************************/
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478
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479 void
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480 syms_of_select_gtk (void)
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481 {
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482 }
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483
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484 void
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485 console_type_create_select_gtk (void)
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486 {
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487 CONSOLE_HAS_METHOD (gtk, own_selection);
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488 CONSOLE_HAS_METHOD (gtk, disown_selection);
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489 CONSOLE_HAS_METHOD (gtk, selection_exists_p);
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490 CONSOLE_HAS_METHOD (gtk, get_foreign_selection);
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491 }
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492
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493 void
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494 vars_of_select_gtk (void)
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495 {
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496 staticpro (&Vretrieved_selection);
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497 Vretrieved_selection = Qnil;
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498
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499 DEFVAR_LISP ("gtk-sent-selection-hooks", &Vgtk_sent_selection_hooks /*
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500 A function or functions to be called after we have responded to some
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501 other client's request for the value of a selection that we own. The
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502 function(s) will be called with four arguments:
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503 - the name of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD);
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504 - the name of the selection-type which we were requested to convert the
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505 selection into before sending (for example, STRING or LENGTH);
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506 - and whether we successfully transmitted the selection.
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507 We might have failed (and declined the request) for any number of reasons,
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508 including being asked for a selection that we no longer own, or being asked
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509 to convert into a type that we don't know about or that is inappropriate.
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510 This hook doesn't let you change the behavior of emacs's selection replies,
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511 it merely informs you that they have happened.
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512 */ );
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513 Vgtk_sent_selection_hooks = Qunbound;
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514 }
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