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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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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not synched with FSF. */
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22
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23 /* Authorship:
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24
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25 Written by Kevin Gallo for FSF Emacs.
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26 Rewritten for mswindows by Jonathan Harris, December 1997 for 21.0.
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27 Rewritten for GTK by William Perry, April 2000 for 21.1
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28 */
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29
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30
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31 #include <config.h>
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32 #include "lisp.h"
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33 #include "events.h"
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34 #include "buffer.h"
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35 #include "device.h"
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36 #include "console-gtk.h"
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37 #include "select.h"
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38 #include "opaque.h"
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39 #include "frame.h"
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40
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41 static Lisp_Object Vretrieved_selection;
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42 static gboolean waiting_for_selection;
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43 Lisp_Object Vgtk_sent_selection_hooks;
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44
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647
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45 static GdkAtom
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46 symbol_to_gtk_atom (struct device *d, Lisp_Object sym, int only_if_exists)
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47 {
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48 if (NILP (sym)) return GDK_SELECTION_PRIMARY;
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49 if (EQ (sym, Qt)) return GDK_SELECTION_SECONDARY;
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50 if (EQ (sym, QPRIMARY)) return GDK_SELECTION_PRIMARY;
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51 if (EQ (sym, QSECONDARY)) return GDK_SELECTION_SECONDARY;
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52
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53 {
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54 const Extbyte *nameext;
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55 LISP_STRING_TO_EXTERNAL (Fsymbol_name (sym), nameext, Qctext);
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56 return gdk_atom_intern (nameext, only_if_exists ? TRUE : FALSE);
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57 }
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58 }
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462
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59
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647
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60 static Lisp_Object
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61 atom_to_symbol (struct device *d, GdkAtom atom)
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62 {
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63 if (atom == GDK_SELECTION_PRIMARY) return (QPRIMARY);
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64 if (atom == GDK_SELECTION_SECONDARY) return (QSECONDARY);
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65
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66 {
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665
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67 CIntbyte *intstr;
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647
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68 Extbyte *str = gdk_atom_name (atom);
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69
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70 if (! str) return Qnil;
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462
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71
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647
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72 TO_INTERNAL_FORMAT (C_STRING, str,
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73 C_STRING_ALLOCA, intstr,
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74 Qctext);
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75 g_free (str);
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76 return intern (intstr);
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77 }
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78 }
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79
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80 #define PROCESSING_GTK_CODE
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81 #include "select-common.h"
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82 #undef PROCESSING_GTK_CODE
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83
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84
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462
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85 /* Set the selection data to GDK_NONE and NULL data, meaning we were
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86 ** unable to do what they wanted.
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87 */
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88 static void
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89 gtk_decline_selection_request (GtkSelectionData *data)
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90 {
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91 gtk_selection_data_set (data, GDK_NONE, 0, NULL, 0);
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92 }
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93
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94 /* Used as an unwind-protect clause so that, if a selection-converter signals
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95 an error, we tell the requestor that we were unable to do what they wanted
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96 before we throw to top-level or go into the debugger or whatever.
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97 */
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98 struct _selection_closure
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99 {
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100 GtkSelectionData *data;
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101 gboolean successful;
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102 };
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103
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104 static Lisp_Object
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105 gtk_selection_request_lisp_error (Lisp_Object closure)
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106 {
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107 struct _selection_closure *cl = (struct _selection_closure *)
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108 get_opaque_ptr (closure);
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109
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110 free_opaque_ptr (closure);
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111 if (cl->successful == TRUE)
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112 return Qnil;
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113 gtk_decline_selection_request (cl->data);
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114 return Qnil;
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115 }
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116
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117 /* This provides the current selection to a requester.
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118 **
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119 ** This is connected to the selection_get() signal of the application
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120 ** shell in device-gtk.c:gtk_init_device().
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121 **
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122 ** This is radically different than the old selection code (21.1.x),
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123 ** but has been modeled after the X code, and appears to work.
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124 **
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125 ** WMP Feb 12 2001
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126 */
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127 void
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128 emacs_gtk_selection_handle (GtkWidget *widget,
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129 GtkSelectionData *selection_data,
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130 guint info,
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131 guint time_stamp,
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132 gpointer data)
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133 {
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134 /* This function can GC */
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135 struct gcpro gcpro1, gcpro2;
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136 Lisp_Object temp_obj;
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137 Lisp_Object selection_symbol;
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138 Lisp_Object target_symbol = Qnil;
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139 Lisp_Object converted_selection = Qnil;
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140 guint32 local_selection_time;
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141 Lisp_Object successful_p = Qnil;
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142 int count;
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143 struct device *d = decode_gtk_device (Qnil);
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144 struct _selection_closure *cl = NULL;
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145
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146 GCPRO2 (converted_selection, target_symbol);
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147
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148 selection_symbol = atom_to_symbol (d, selection_data->selection);
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149 target_symbol = atom_to_symbol (d, selection_data->target);
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150
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151 #if 0 /* #### MULTIPLE doesn't work yet */
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152 if (EQ (target_symbol, QMULTIPLE))
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153 target_symbol = fetch_multiple_target (selection_data);
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154 #endif
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155
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156 temp_obj = Fget_selection_timestamp (selection_symbol);
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157
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158 if (NILP (temp_obj))
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159 {
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160 /* We don't appear to have the selection. */
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161 gtk_decline_selection_request (selection_data);
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162
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163 goto DONE_LABEL;
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164 }
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165
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166 local_selection_time = * (guint32 *) XOPAQUE_DATA (temp_obj);
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167
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168 if (time_stamp != GDK_CURRENT_TIME &&
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169 local_selection_time > time_stamp)
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170 {
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171 /* Someone asked for the selection, and we have one, but not the one
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172 they're looking for. */
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173 gtk_decline_selection_request (selection_data);
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174 goto DONE_LABEL;
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175 }
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176
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177 converted_selection = select_convert_out (selection_symbol,
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178 target_symbol, Qnil);
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179
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180 /* #### Is this the right thing to do? I'm no X expert. -- ajh */
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181 if (NILP (converted_selection))
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182 {
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183 /* We don't appear to have a selection in that data type. */
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184 gtk_decline_selection_request (selection_data);
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185 goto DONE_LABEL;
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186 }
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187
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188 count = specpdl_depth ();
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189
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190 cl = (struct _selection_closure *) xmalloc (sizeof (*cl));
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191 cl->data = selection_data;
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192 cl->successful = FALSE;
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193
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194 record_unwind_protect (gtk_selection_request_lisp_error,
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195 make_opaque_ptr (cl));
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196
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197 {
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647
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198 UChar_Binary *data;
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665
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199 Bytecount size;
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462
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200 int format;
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201 GdkAtom type;
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202 lisp_data_to_selection_data (d, converted_selection,
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203 &data, &type, &size, &format);
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204
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647
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205 gtk_selection_data_set (selection_data, type, format, data,
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206 /* #### is this right? */
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207 (unsigned int) size);
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462
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208 successful_p = Qt;
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209 /* Tell x_selection_request_lisp_error() it's cool. */
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210 cl->successful = TRUE;
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211 xfree (data);
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212 }
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213
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214 unbind_to (count, Qnil);
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215
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216 DONE_LABEL:
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217
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218 if (cl) xfree (cl);
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219
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220 UNGCPRO;
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221
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222 /* Let random lisp code notice that the selection has been asked for. */
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223 {
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224 Lisp_Object val = Vgtk_sent_selection_hooks;
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225 if (!UNBOUNDP (val) && !NILP (val))
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226 {
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227 Lisp_Object rest;
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228 if (CONSP (val) && !EQ (XCAR (val), Qlambda))
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229 for (rest = val; !NILP (rest); rest = Fcdr (rest))
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230 call3 (Fcar (rest), selection_symbol, target_symbol, successful_p);
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231 else
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232 call3 (val, selection_symbol, target_symbol, successful_p);
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233 }
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234 }
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235 }
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236
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237
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746
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238 void
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239 emacs_gtk_selection_clear_event_handle (GtkWidget *widget,
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240 GdkEventSelection *event,
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241 gpointer data)
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242 {
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243 GdkAtom selection = event->selection;
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244 guint32 changed_owner_time = event->time;
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245 struct device *d = decode_gtk_device (Qnil);
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246
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247 Lisp_Object selection_symbol, local_selection_time_lisp;
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248 guint32 local_selection_time;
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249
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250 selection_symbol = atom_to_symbol (d, selection);
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251
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252 local_selection_time_lisp = Fget_selection_timestamp (selection_symbol);
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253
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254 /* We don't own the selection, so that's fine. */
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255 if (NILP (local_selection_time_lisp))
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256 return;
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257
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258 local_selection_time = *(guint32 *) XOPAQUE_DATA (local_selection_time_lisp);
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259
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260 /* This SelectionClear is for a selection that we no longer own, so we can
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261 disregard it. (That is, we have reasserted the selection since this
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262 request was generated.)
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263 */
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264 if (changed_owner_time != GDK_CURRENT_TIME &&
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265 local_selection_time > changed_owner_time)
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266 return;
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267
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268 handle_selection_clear (selection_symbol);
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269 }
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270
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271
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462
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272
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273 static GtkWidget *reading_selection_reply;
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274 static GdkAtom reading_which_selection;
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275 static int selection_reply_timed_out;
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276
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277 /* Gets the current selection owned by another application */
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278 void
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279 emacs_gtk_selection_received (GtkWidget *widget,
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280 GtkSelectionData *selection_data,
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281 gpointer user_data)
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282 {
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283 waiting_for_selection = FALSE;
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284 Vretrieved_selection = Qnil;
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285
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286 reading_selection_reply = NULL;
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287
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288 signal_fake_event ();
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289
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290 if (selection_data->length < 0)
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291 {
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292 return;
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293 }
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294
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295 Vretrieved_selection =
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296 selection_data_to_lisp_data (NULL,
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297 selection_data->data,
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298 selection_data->length,
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299 selection_data->type,
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300 selection_data->format);
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301 }
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302
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303 static int
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304 selection_reply_done (void *ignore)
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305 {
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306 return !reading_selection_reply;
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307 }
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308
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309 /* Do protocol to read selection-data from the server.
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310 Converts this to lisp data and returns it.
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311 */
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312 static Lisp_Object
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313 gtk_get_foreign_selection (Lisp_Object selection_symbol,
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314 Lisp_Object target_type)
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315 {
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316 /* This function can GC */
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317 struct device *d = decode_gtk_device (Qnil);
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318 GtkWidget *requestor = DEVICE_GTK_APP_SHELL (d);
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319 guint32 requestor_time = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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320 GdkAtom selection_atom = symbol_to_gtk_atom (d, selection_symbol, 0);
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321 int speccount;
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322 GdkAtom type_atom = symbol_to_gtk_atom (d, (CONSP (target_type) ?
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323 XCAR (target_type) : target_type), 0);
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324
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325 gtk_selection_convert (requestor, selection_atom, type_atom,
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326 requestor_time);
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327
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328 signal_fake_event ();
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329
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330 /* Block until the reply has been read. */
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331 reading_selection_reply = requestor;
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332 reading_which_selection = selection_atom;
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333 selection_reply_timed_out = 0;
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334
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335 speccount = specpdl_depth ();
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336
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337 #if 0
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338 /* add a timeout handler */
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339 if (gtk_selection_timeout > 0)
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340 {
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341 Lisp_Object id = Fadd_timeout (make_int (x_selection_timeout),
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342 Qx_selection_reply_timeout_internal,
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343 Qnil, Qnil);
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344 record_unwind_protect (Fdisable_timeout, id);
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345 }
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346 #endif
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347
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348 /* This is ^Gable */
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349 wait_delaying_user_input (selection_reply_done, 0);
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350
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351 if (selection_reply_timed_out)
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563
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352 signal_error (Qselection_conversion_error, "timed out waiting for reply from selection owner", Qunbound);
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462
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353
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354 unbind_to (speccount, Qnil);
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355
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356 /* otherwise, the selection is waiting for us on the requested property. */
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357 return select_convert_in (selection_symbol,
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358 target_type,
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359 Vretrieved_selection);
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360 }
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361
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362
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363 #if 0
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364 static void
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365 gtk_get_window_property (struct device *d, GtkWidget *window, GdkAtom property,
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366 Extbyte **data_ret, int *bytes_ret,
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367 GdkAtom *actual_type_ret, int *actual_format_ret,
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368 unsigned long *actual_size_ret, int delete_p)
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369 {
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647
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370 /* deleted */
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462
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371 }
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372
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373
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374 static void
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375 receive_incremental_selection (Display *display, Window window, Atom property,
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376 /* this one is for error messages only */
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377 Lisp_Object target_type,
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378 unsigned int min_size_bytes,
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379 Extbyte **data_ret, int *size_bytes_ret,
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380 Atom *type_ret, int *format_ret,
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381 unsigned long *size_ret)
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382 {
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647
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383 /* deleted */
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462
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384 }
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385
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386
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387 static Lisp_Object
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388 gtk_get_window_property_as_lisp_data (struct device *d,
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389 GtkWidget *window,
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390 GdkAtom property,
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391 /* next two for error messages only */
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392 Lisp_Object target_type,
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393 GdkAtom selection_atom)
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394 {
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647
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395 /* deleted */
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462
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396 }
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397 #endif
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398
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399
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400
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401 static Lisp_Object
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402 gtk_own_selection (Lisp_Object selection_name, Lisp_Object selection_value,
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712
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403 Lisp_Object how_to_add, Lisp_Object selection_type, int owned_p)
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462
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404 {
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405 struct device *d = decode_gtk_device (Qnil);
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406 GtkWidget *selecting_window = GTK_WIDGET (DEVICE_GTK_APP_SHELL (d));
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407 Lisp_Object selection_time;
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408 /* Use the time of the last-read mouse or keyboard event.
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409 For selection purposes, we use this as a sleazy way of knowing what the
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410 current time is in server-time. This assumes that the most recently read
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411 mouse or keyboard event has something to do with the assertion of the
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412 selection, which is probably true.
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413 */
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414 guint32 thyme = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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415 GdkAtom selection_atom;
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416
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417 CHECK_SYMBOL (selection_name);
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418 selection_atom = symbol_to_gtk_atom (d, selection_name, 0);
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419
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420 gtk_selection_owner_set (selecting_window,
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421 selection_atom,
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422 thyme);
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423
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424 /* We do NOT use time_to_lisp() here any more, like we used to.
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425 That assumed equivalence of time_t and Time, which is not
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426 necessarily the case (e.g. under OSF on the Alphas, where
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427 Time is a 64-bit quantity and time_t is a 32-bit quantity).
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428
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429 Opaque pointers are the clean way to go here.
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430 */
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431 selection_time = make_opaque (&thyme, sizeof (thyme));
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432
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433 return selection_time;
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434 }
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435
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436 static void
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437 gtk_disown_selection (Lisp_Object selection, Lisp_Object timeval)
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438 {
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439 struct device *d = decode_gtk_device (Qnil);
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440 GdkAtom selection_atom;
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441 guint32 timestamp;
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442
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443 CHECK_SYMBOL (selection);
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444 selection_atom = symbol_to_gtk_atom (d, selection, 0);
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445
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446 if (NILP (timeval))
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447 timestamp = DEVICE_GTK_MOUSE_TIMESTAMP (d);
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448 else
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449 {
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450 time_t the_time;
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451 lisp_to_time (timeval, &the_time);
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452 timestamp = (guint32) the_time;
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453 }
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454
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455 gtk_selection_owner_set (NULL, selection_atom, timestamp);
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456 }
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457
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458 static Lisp_Object
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459 gtk_selection_exists_p (Lisp_Object selection,
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460 Lisp_Object selection_type)
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461 {
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462 struct device *d = decode_gtk_device (Qnil);
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463
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464 return (gdk_selection_owner_get (symbol_to_gtk_atom (d, selection, 0)) ? Qt : Qnil);
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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 /************************************************************************/
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470 /* initialization */
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471 /************************************************************************/
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472
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473 void
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474 syms_of_select_gtk (void)
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475 {
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476 }
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477
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478 void
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479 console_type_create_select_gtk (void)
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480 {
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481 CONSOLE_HAS_METHOD (gtk, own_selection);
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482 CONSOLE_HAS_METHOD (gtk, disown_selection);
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483 CONSOLE_HAS_METHOD (gtk, selection_exists_p);
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484 CONSOLE_HAS_METHOD (gtk, get_foreign_selection);
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485 }
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486
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487 void
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488 vars_of_select_gtk (void)
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|
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489 {
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490 staticpro (&Vretrieved_selection);
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491 Vretrieved_selection = Qnil;
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492
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493 DEFVAR_LISP ("gtk-sent-selection-hooks", &Vgtk_sent_selection_hooks /*
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494 A function or functions to be called after we have responded to some
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495 other client's request for the value of a selection that we own. The
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496 function(s) will be called with four arguments:
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497 - the name of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD);
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498 - the name of the selection-type which we were requested to convert the
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499 selection into before sending (for example, STRING or LENGTH);
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500 - and whether we successfully transmitted the selection.
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501 We might have failed (and declined the request) for any number of reasons,
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502 including being asked for a selection that we no longer own, or being asked
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503 to convert into a type that we don't know about or that is inappropriate.
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|
504 This hook doesn't let you change the behavior of emacs's selection replies,
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|
505 it merely informs you that they have happened.
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|
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506 */ );
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507 Vgtk_sent_selection_hooks = Qunbound;
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|
|
508 }
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