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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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34 #include "events.h"
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35 #include "buffer.h"
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36 #include "device.h"
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37 #include "console-gtk.h"
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38 #include "select.h"
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39 #include "opaque.h"
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40 #include "frame.h"
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41
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42 static Lisp_Object Vretrieved_selection;
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43 static gboolean waiting_for_selection;
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44 Lisp_Object Vgtk_sent_selection_hooks;
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45
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647
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46 static GdkAtom
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47 symbol_to_gtk_atom (struct device *d, Lisp_Object sym, int only_if_exists)
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48 {
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49 if (NILP (sym)) return GDK_SELECTION_PRIMARY;
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50 if (EQ (sym, Qt)) return GDK_SELECTION_SECONDARY;
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51 if (EQ (sym, QPRIMARY)) return GDK_SELECTION_PRIMARY;
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52 if (EQ (sym, QSECONDARY)) return GDK_SELECTION_SECONDARY;
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53
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54 {
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55 const Extbyte *nameext;
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56 LISP_STRING_TO_EXTERNAL (Fsymbol_name (sym), nameext, Qctext);
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57 return gdk_atom_intern (nameext, only_if_exists ? TRUE : FALSE);
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58 }
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59 }
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462
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60
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647
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61 static Lisp_Object
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62 atom_to_symbol (struct device *d, GdkAtom atom)
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63 {
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64 if (atom == GDK_SELECTION_PRIMARY) return (QPRIMARY);
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65 if (atom == GDK_SELECTION_SECONDARY) return (QSECONDARY);
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66
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67 {
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771
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68 Intbyte *intstr;
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647
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69 Extbyte *str = gdk_atom_name (atom);
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70
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71 if (! str) return Qnil;
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462
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72
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771
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73 EXTERNAL_TO_C_STRING (str, intstr, Qctext);
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647
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74 g_free (str);
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771
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75 return intern_int (intstr);
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647
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76 }
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77 }
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78
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79 #define PROCESSING_GTK_CODE
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80 #include "select-common.h"
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81 #undef PROCESSING_GTK_CODE
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82
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83
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462
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84 /* Set the selection data to GDK_NONE and NULL data, meaning we were
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85 ** unable to do what they wanted.
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86 */
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87 static void
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88 gtk_decline_selection_request (GtkSelectionData *data)
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89 {
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90 gtk_selection_data_set (data, GDK_NONE, 0, NULL, 0);
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91 }
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92
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93 /* Used as an unwind-protect clause so that, if a selection-converter signals
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94 an error, we tell the requestor that we were unable to do what they wanted
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95 before we throw to top-level or go into the debugger or whatever.
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96 */
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97 struct _selection_closure
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98 {
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99 GtkSelectionData *data;
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100 gboolean successful;
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101 };
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102
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103 static Lisp_Object
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104 gtk_selection_request_lisp_error (Lisp_Object closure)
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105 {
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106 struct _selection_closure *cl = (struct _selection_closure *)
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107 get_opaque_ptr (closure);
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108
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109 free_opaque_ptr (closure);
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110 if (cl->successful == TRUE)
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111 return Qnil;
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112 gtk_decline_selection_request (cl->data);
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113 return Qnil;
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114 }
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115
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116 /* This provides the current selection to a requester.
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117 **
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118 ** This is connected to the selection_get() signal of the application
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119 ** shell in device-gtk.c:gtk_init_device().
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120 **
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121 ** This is radically different than the old selection code (21.1.x),
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122 ** but has been modeled after the X code, and appears to work.
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123 **
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124 ** WMP Feb 12 2001
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125 */
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126 void
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127 emacs_gtk_selection_handle (GtkWidget *widget,
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128 GtkSelectionData *selection_data,
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129 guint info,
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130 guint time_stamp,
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131 gpointer data)
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132 {
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133 /* This function can GC */
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134 struct gcpro gcpro1, gcpro2;
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135 Lisp_Object temp_obj;
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136 Lisp_Object selection_symbol;
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137 Lisp_Object target_symbol = Qnil;
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138 Lisp_Object converted_selection = Qnil;
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139 guint32 local_selection_time;
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140 Lisp_Object successful_p = Qnil;
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141 int count;
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142 struct device *d = decode_gtk_device (Qnil);
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143 struct _selection_closure *cl = NULL;
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144
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145 GCPRO2 (converted_selection, target_symbol);
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146
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147 selection_symbol = atom_to_symbol (d, selection_data->selection);
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148 target_symbol = atom_to_symbol (d, selection_data->target);
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149
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150 #if 0 /* #### MULTIPLE doesn't work yet */
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151 if (EQ (target_symbol, QMULTIPLE))
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152 target_symbol = fetch_multiple_target (selection_data);
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153 #endif
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154
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155 temp_obj = Fget_selection_timestamp (selection_symbol);
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156
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157 if (NILP (temp_obj))
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158 {
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159 /* We don't appear to have the selection. */
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160 gtk_decline_selection_request (selection_data);
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161
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162 goto DONE_LABEL;
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163 }
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164
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165 local_selection_time = * (guint32 *) XOPAQUE_DATA (temp_obj);
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166
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167 if (time_stamp != GDK_CURRENT_TIME &&
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168 local_selection_time > time_stamp)
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169 {
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170 /* Someone asked for the selection, and we have one, but not the one
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171 they're looking for. */
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172 gtk_decline_selection_request (selection_data);
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173 goto DONE_LABEL;
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174 }
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175
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176 converted_selection = select_convert_out (selection_symbol,
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177 target_symbol, Qnil);
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178
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179 /* #### Is this the right thing to do? I'm no X expert. -- ajh */
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180 if (NILP (converted_selection))
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181 {
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182 /* We don't appear to have a selection in that data type. */
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183 gtk_decline_selection_request (selection_data);
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184 goto DONE_LABEL;
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185 }
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186
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187 count = specpdl_depth ();
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188
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189 cl = (struct _selection_closure *) xmalloc (sizeof (*cl));
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190 cl->data = selection_data;
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191 cl->successful = FALSE;
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192
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193 record_unwind_protect (gtk_selection_request_lisp_error,
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194 make_opaque_ptr (cl));
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195
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196 {
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647
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197 UChar_Binary *data;
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665
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198 Bytecount size;
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462
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199 int format;
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200 GdkAtom type;
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201 lisp_data_to_selection_data (d, converted_selection,
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202 &data, &type, &size, &format);
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203
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647
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204 gtk_selection_data_set (selection_data, type, format, data,
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205 /* #### is this right? */
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206 (unsigned int) size);
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462
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207 successful_p = Qt;
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208 /* Tell x_selection_request_lisp_error() it's cool. */
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209 cl->successful = TRUE;
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210 xfree (data);
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211 }
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212
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771
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213 unbind_to (count);
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462
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214
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215 DONE_LABEL:
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216
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217 if (cl) xfree (cl);
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218
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219 UNGCPRO;
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220
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221 /* Let random lisp code notice that the selection has been asked for. */
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222 {
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223 Lisp_Object val = Vgtk_sent_selection_hooks;
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224 if (!UNBOUNDP (val) && !NILP (val))
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225 {
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226 Lisp_Object rest;
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227 if (CONSP (val) && !EQ (XCAR (val), Qlambda))
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228 for (rest = val; !NILP (rest); rest = Fcdr (rest))
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229 call3 (Fcar (rest), selection_symbol, target_symbol, successful_p);
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230 else
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231 call3 (val, selection_symbol, target_symbol, successful_p);
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232 }
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233 }
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234 }
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235
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236
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746
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237 void
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238 emacs_gtk_selection_clear_event_handle (GtkWidget *widget,
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239 GdkEventSelection *event,
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240 gpointer data)
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241 {
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242 GdkAtom selection = event->selection;
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243 guint32 changed_owner_time = event->time;
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244 struct device *d = decode_gtk_device (Qnil);
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245
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246 Lisp_Object selection_symbol, local_selection_time_lisp;
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247 guint32 local_selection_time;
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248
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249 selection_symbol = atom_to_symbol (d, selection);
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250
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251 local_selection_time_lisp = Fget_selection_timestamp (selection_symbol);
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252
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253 /* We don't own the selection, so that's fine. */
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254 if (NILP (local_selection_time_lisp))
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255 return;
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256
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257 local_selection_time = *(guint32 *) XOPAQUE_DATA (local_selection_time_lisp);
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258
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259 /* This SelectionClear is for a selection that we no longer own, so we can
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260 disregard it. (That is, we have reasserted the selection since this
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261 request was generated.)
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262 */
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263 if (changed_owner_time != GDK_CURRENT_TIME &&
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264 local_selection_time > changed_owner_time)
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265 return;
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266
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267 handle_selection_clear (selection_symbol);
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268 }
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269
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270
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462
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271
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272 static GtkWidget *reading_selection_reply;
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273 static GdkAtom reading_which_selection;
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274 static int selection_reply_timed_out;
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275
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276 /* Gets the current selection owned by another application */
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277 void
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278 emacs_gtk_selection_received (GtkWidget *widget,
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279 GtkSelectionData *selection_data,
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280 gpointer user_data)
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281 {
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282 waiting_for_selection = FALSE;
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283 Vretrieved_selection = Qnil;
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284
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285 reading_selection_reply = NULL;
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286
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287 signal_fake_event ();
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288
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289 if (selection_data->length < 0)
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290 {
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291 return;
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292 }
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293
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294 Vretrieved_selection =
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295 selection_data_to_lisp_data (NULL,
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296 selection_data->data,
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297 selection_data->length,
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298 selection_data->type,
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299 selection_data->format);
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300 }
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301
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302 static int
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303 selection_reply_done (void *ignore)
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304 {
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305 return !reading_selection_reply;
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306 }
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307
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308 /* Do protocol to read selection-data from the server.
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309 Converts this to lisp data and returns it.
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310 */
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311 static Lisp_Object
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312 gtk_get_foreign_selection (Lisp_Object selection_symbol,
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313 Lisp_Object target_type)
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314 {
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315 /* This function can GC */
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316 struct device *d = decode_gtk_device (Qnil);
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317 GtkWidget *requestor = DEVICE_GTK_APP_SHELL (d);
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318 guint32 requestor_time = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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319 GdkAtom selection_atom = symbol_to_gtk_atom (d, selection_symbol, 0);
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320 int speccount;
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321 GdkAtom type_atom = symbol_to_gtk_atom (d, (CONSP (target_type) ?
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322 XCAR (target_type) : target_type), 0);
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323
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324 gtk_selection_convert (requestor, selection_atom, type_atom,
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325 requestor_time);
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326
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327 signal_fake_event ();
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328
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329 /* Block until the reply has been read. */
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330 reading_selection_reply = requestor;
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331 reading_which_selection = selection_atom;
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332 selection_reply_timed_out = 0;
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333
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334 speccount = specpdl_depth ();
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335
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336 #if 0
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337 /* add a timeout handler */
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338 if (gtk_selection_timeout > 0)
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339 {
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340 Lisp_Object id = Fadd_timeout (make_int (x_selection_timeout),
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341 Qx_selection_reply_timeout_internal,
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342 Qnil, Qnil);
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343 record_unwind_protect (Fdisable_timeout, id);
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344 }
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345 #endif
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346
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347 /* This is ^Gable */
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348 wait_delaying_user_input (selection_reply_done, 0);
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349
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350 if (selection_reply_timed_out)
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563
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351 signal_error (Qselection_conversion_error, "timed out waiting for reply from selection owner", Qunbound);
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462
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352
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771
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353 unbind_to (speccount);
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462
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354
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355 /* otherwise, the selection is waiting for us on the requested property. */
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356 return select_convert_in (selection_symbol,
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357 target_type,
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358 Vretrieved_selection);
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359 }
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360
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361
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362 #if 0
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363 static void
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364 gtk_get_window_property (struct device *d, GtkWidget *window, GdkAtom property,
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365 Extbyte **data_ret, int *bytes_ret,
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366 GdkAtom *actual_type_ret, int *actual_format_ret,
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367 unsigned long *actual_size_ret, int delete_p)
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368 {
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647
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369 /* deleted */
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462
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370 }
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371
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372
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373 static void
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374 receive_incremental_selection (Display *display, Window window, Atom property,
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375 /* this one is for error messages only */
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376 Lisp_Object target_type,
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377 unsigned int min_size_bytes,
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378 Extbyte **data_ret, int *size_bytes_ret,
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379 Atom *type_ret, int *format_ret,
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380 unsigned long *size_ret)
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381 {
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|
647
|
382 /* deleted */
|
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462
|
383 }
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384
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385
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386 static Lisp_Object
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387 gtk_get_window_property_as_lisp_data (struct device *d,
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388 GtkWidget *window,
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389 GdkAtom property,
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390 /* next two for error messages only */
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391 Lisp_Object target_type,
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392 GdkAtom selection_atom)
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|
393 {
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|
647
|
394 /* deleted */
|
|
462
|
395 }
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|
|
396 #endif
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|
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397
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398
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399
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400 static Lisp_Object
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401 gtk_own_selection (Lisp_Object selection_name, Lisp_Object selection_value,
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|
712
|
402 Lisp_Object how_to_add, Lisp_Object selection_type, int owned_p)
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|
462
|
403 {
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404 struct device *d = decode_gtk_device (Qnil);
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405 GtkWidget *selecting_window = GTK_WIDGET (DEVICE_GTK_APP_SHELL (d));
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406 Lisp_Object selection_time;
|
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407 /* Use the time of the last-read mouse or keyboard event.
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|
408 For selection purposes, we use this as a sleazy way of knowing what the
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409 current time is in server-time. This assumes that the most recently read
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|
|
410 mouse or keyboard event has something to do with the assertion of the
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411 selection, which is probably true.
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|
|
412 */
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413 guint32 thyme = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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414 GdkAtom selection_atom;
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415
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416 CHECK_SYMBOL (selection_name);
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417 selection_atom = symbol_to_gtk_atom (d, selection_name, 0);
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418
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419 gtk_selection_owner_set (selecting_window,
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420 selection_atom,
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421 thyme);
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422
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423 /* We do NOT use time_to_lisp() here any more, like we used to.
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424 That assumed equivalence of time_t and Time, which is not
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425 necessarily the case (e.g. under OSF on the Alphas, where
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426 Time is a 64-bit quantity and time_t is a 32-bit quantity).
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427
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428 Opaque pointers are the clean way to go here.
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429 */
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430 selection_time = make_opaque (&thyme, sizeof (thyme));
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431
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432 return selection_time;
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433 }
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434
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435 static void
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436 gtk_disown_selection (Lisp_Object selection, Lisp_Object timeval)
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437 {
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438 struct device *d = decode_gtk_device (Qnil);
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439 GdkAtom selection_atom;
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440 guint32 timestamp;
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441
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442 CHECK_SYMBOL (selection);
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443 selection_atom = symbol_to_gtk_atom (d, selection, 0);
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444
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445 if (NILP (timeval))
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446 timestamp = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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447 else
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448 {
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449 time_t the_time;
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450 lisp_to_time (timeval, &the_time);
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451 timestamp = (guint32) the_time;
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452 }
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453
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454 gtk_selection_owner_set (NULL, selection_atom, timestamp);
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455 }
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456
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457 static Lisp_Object
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458 gtk_selection_exists_p (Lisp_Object selection,
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459 Lisp_Object selection_type)
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460 {
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461 struct device *d = decode_gtk_device (Qnil);
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462
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463 return (gdk_selection_owner_get (symbol_to_gtk_atom (d, selection, 0)) ? Qt : Qnil);
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464 }
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465
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466
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467
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468 /************************************************************************/
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469 /* initialization */
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470 /************************************************************************/
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471
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472 void
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473 syms_of_select_gtk (void)
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|
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474 {
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|
|
475 }
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476
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|
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477 void
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|
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478 console_type_create_select_gtk (void)
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|
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479 {
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|
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480 CONSOLE_HAS_METHOD (gtk, own_selection);
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|
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481 CONSOLE_HAS_METHOD (gtk, disown_selection);
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482 CONSOLE_HAS_METHOD (gtk, selection_exists_p);
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|
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483 CONSOLE_HAS_METHOD (gtk, get_foreign_selection);
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|
|
484 }
|
|
|
485
|
|
|
486 void
|
|
|
487 vars_of_select_gtk (void)
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|
|
488 {
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|
|
489 staticpro (&Vretrieved_selection);
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|
|
490 Vretrieved_selection = Qnil;
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|
|
491
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|
|
492 DEFVAR_LISP ("gtk-sent-selection-hooks", &Vgtk_sent_selection_hooks /*
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|
|
493 A function or functions to be called after we have responded to some
|
|
|
494 other client's request for the value of a selection that we own. The
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|
|
495 function(s) will be called with four arguments:
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496 - the name of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD);
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|
|
497 - the name of the selection-type which we were requested to convert the
|
|
|
498 selection into before sending (for example, STRING or LENGTH);
|
|
|
499 - and whether we successfully transmitted the selection.
|
|
|
500 We might have failed (and declined the request) for any number of reasons,
|
|
|
501 including being asked for a selection that we no longer own, or being asked
|
|
|
502 to convert into a type that we don't know about or that is inappropriate.
|
|
|
503 This hook doesn't let you change the behavior of emacs's selection replies,
|
|
|
504 it merely informs you that they have happened.
|
|
|
505 */ );
|
|
|
506 Vgtk_sent_selection_hooks = Qunbound;
|
|
|
507 }
|
