1 | /* |
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2 | * AT-SPI - Assistive Technology Service Provider Interface |
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3 | * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap) |
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4 | * |
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5 | * Copyright 2001, 2002 Sun Microsystems Inc., |
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6 | * Copyright 2001, 2002 Ximian, Inc. |
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7 | * |
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8 | * This library is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU Library General Public |
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10 | * License as published by the Free Software Foundation; either |
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11 | * version 2 of the License, or (at your option) any later version. |
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12 | * |
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13 | * This library is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * Library General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU Library General Public |
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19 | * License along with this library; if not, write to the |
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20 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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21 | * Boston, MA 02111-1307, USA. |
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22 | */ |
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23 | |
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24 | /* application.c: implements SpiApplication.idl */ |
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25 | |
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26 | #include <string.h> |
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27 | #include <config.h> |
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28 | #include <atk/atkutil.h> |
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29 | #include <libspi/application.h> |
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30 | #include "spi-private.h" |
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31 | |
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32 | /* Our parent Gtk object type */ |
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33 | #define PARENT_TYPE SPI_ACCESSIBLE_TYPE |
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34 | |
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35 | /* A pointer to our parent object class */ |
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36 | static SpiAccessibleClass *spi_application_parent_class; |
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37 | |
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38 | static SpiApplication *the_app; |
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39 | |
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40 | /* static methods */ |
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41 | |
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42 | static void notify_listeners (GList *listeners, |
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43 | SpiAccessible *source, |
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44 | Accessibility_Event *e); |
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45 | |
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46 | static const char *reverse_lookup_name_for_toolkit_event (char *toolkit_name); |
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47 | |
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48 | static const char * |
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49 | lookup_toolkit_event_for_name (const char *generic_name) |
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50 | { |
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51 | char *toolkit_specific_name; |
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52 | SpiApplicationClass *klass = g_type_class_peek (SPI_APPLICATION_TYPE); |
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53 | #ifdef SPI_DEBUG |
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54 | fprintf (stderr, "looking for %s in hash table.\n", generic_name); |
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55 | #endif |
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56 | toolkit_specific_name = |
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57 | (char *) g_hash_table_lookup (klass->toolkit_event_names, generic_name); |
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58 | #ifdef SPI_DEBUG |
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59 | fprintf (stderr, "generic event %s converted to %s\n", generic_name, toolkit_specific_name); |
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60 | #endif |
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61 | return toolkit_specific_name; |
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62 | } |
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63 | |
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64 | /* |
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65 | * Implemented GObject::finalize |
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66 | */ |
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67 | static void |
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68 | spi_accessible_application_finalize (GObject *object) |
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69 | { |
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70 | GList *l; |
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71 | SpiApplication *application = (SpiApplication *) object; |
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72 | CORBA_Environment ev; |
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73 | |
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74 | CORBA_exception_init (&ev); |
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75 | |
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76 | for (l = application->toolkit_listeners; l; l = l->next) |
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77 | { |
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78 | CORBA_Object_release ((CORBA_Object) l->data, &ev); |
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79 | } |
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80 | |
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81 | CORBA_exception_free (&ev); |
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82 | |
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83 | g_list_free (application->toolkit_listeners); |
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84 | application->toolkit_listeners = NULL; |
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85 | |
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86 | g_print ("application finalize called\n"); |
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87 | (G_OBJECT_CLASS (spi_application_parent_class))->finalize (object); |
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88 | } |
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89 | |
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90 | static CORBA_string |
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91 | impl_accessibility_application_get_toolkit_name (PortableServer_Servant servant, |
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92 | CORBA_Environment *ev) |
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93 | { |
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94 | return CORBA_string_dup (atk_get_toolkit_name ()); |
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95 | } |
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96 | |
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97 | static CORBA_string |
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98 | impl_accessibility_application_get_version (PortableServer_Servant servant, |
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99 | CORBA_Environment *ev) |
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100 | { |
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101 | return CORBA_string_dup (atk_get_toolkit_version ()); |
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102 | } |
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103 | |
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104 | static CORBA_long |
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105 | impl_accessibility_application_get_id (PortableServer_Servant servant, |
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106 | CORBA_Environment *ev) |
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107 | { |
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108 | SpiApplication *application = SPI_APPLICATION ( |
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109 | bonobo_object_from_servant (servant)); |
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110 | |
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111 | return application->id; |
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112 | } |
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113 | |
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114 | static void |
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115 | impl_accessibility_application_set_id (PortableServer_Servant servant, |
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116 | const CORBA_long id, |
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117 | CORBA_Environment *ev) |
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118 | { |
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119 | SpiApplication *application = SPI_APPLICATION ( |
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120 | bonobo_object_from_servant (servant)); |
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121 | |
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122 | application->id = id; |
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123 | } |
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124 | |
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125 | static AtkObject * |
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126 | get_atk_object_ref (GObject *gobject) |
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127 | { |
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128 | AtkObject *aobject; |
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129 | |
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130 | if (ATK_IS_IMPLEMENTOR (gobject)) |
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131 | { |
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132 | aobject = atk_implementor_ref_accessible (ATK_IMPLEMENTOR (gobject)); |
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133 | } |
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134 | else if (ATK_IS_OBJECT (gobject)) |
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135 | { |
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136 | aobject = ATK_OBJECT (gobject); |
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137 | g_object_ref (G_OBJECT (aobject)); |
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138 | } |
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139 | else |
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140 | { |
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141 | aobject = NULL; |
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142 | g_error ("received event from non-AtkImplementor"); |
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143 | } |
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144 | |
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145 | return aobject; |
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146 | } |
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147 | |
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148 | static gboolean |
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149 | spi_application_object_event_listener (GSignalInvocationHint *signal_hint, |
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150 | guint n_param_values, |
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151 | const GValue *param_values, |
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152 | gpointer data) |
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153 | { |
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154 | Accessibility_Event e; |
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155 | AtkObject *aobject; |
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156 | SpiAccessible *source; |
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157 | GSignalQuery signal_query; |
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158 | gchar *event_name; |
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159 | const char *generic_name; |
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160 | |
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161 | g_return_val_if_fail (the_app != NULL, FALSE); |
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162 | |
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163 | g_signal_query (signal_hint->signal_id, &signal_query); |
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164 | |
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165 | /* TODO: move GTK reference out of app.c into bridge */ |
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166 | event_name = g_strdup_printf ("Gtk:%s:%s", |
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167 | g_type_name (signal_query.itype), |
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168 | signal_query.signal_name); |
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169 | |
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170 | generic_name = reverse_lookup_name_for_toolkit_event (event_name); |
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171 | |
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172 | fprintf (stderr, "Received (object) signal %s maps to '%s'\n", |
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173 | event_name, generic_name); |
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174 | |
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175 | g_free (event_name); |
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176 | |
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177 | g_return_val_if_fail (generic_name, FALSE); |
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178 | |
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179 | aobject = get_atk_object_ref (g_value_get_object (param_values + 0)); |
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180 | |
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181 | source = spi_accessible_new (aobject); |
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182 | e.type = CORBA_string_dup (generic_name); |
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183 | e.source = CORBA_OBJECT_NIL; |
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184 | e.detail1 = 0; |
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185 | e.detail2 = 0; |
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186 | spi_init_any_nil (&e.any_data); |
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187 | notify_listeners (the_app->toolkit_listeners, source, &e); |
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188 | |
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189 | bonobo_object_unref (BONOBO_OBJECT (source)); |
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190 | |
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191 | g_object_unref (G_OBJECT (aobject)); |
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192 | |
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193 | return TRUE; |
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194 | } |
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195 | |
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196 | static gboolean |
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197 | spi_application_toolkit_event_listener (GSignalInvocationHint *signal_hint, |
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198 | guint n_param_values, |
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199 | const GValue *param_values, |
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200 | gpointer data) |
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201 | { |
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202 | Accessibility_Event e; |
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203 | AtkObject *aobject; |
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204 | SpiAccessible *source; |
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205 | GSignalQuery signal_query; |
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206 | char *event_name; |
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207 | |
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208 | g_return_val_if_fail (the_app != NULL, FALSE); |
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209 | |
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210 | g_signal_query (signal_hint->signal_id, &signal_query); |
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211 | |
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212 | /* TODO: move GTK reference out of app.c into bridge */ |
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213 | event_name = g_strdup_printf ("Gtk:%s:%s", |
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214 | g_type_name (signal_query.itype), |
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215 | signal_query.signal_name); |
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216 | |
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217 | #ifdef SPI_DEBUG |
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218 | fprintf (stderr, "Received signal %s\n", event_name); |
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219 | #endif |
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220 | |
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221 | aobject = get_atk_object_ref (g_value_get_object (param_values + 0)); |
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222 | |
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223 | source = spi_accessible_new (aobject); |
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224 | e.type = CORBA_string_dup (event_name); |
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225 | e.source = CORBA_OBJECT_NIL; |
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226 | e.detail1 = 0; |
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227 | e.detail2 = 0; |
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228 | spi_init_any_nil (&e.any_data); |
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229 | notify_listeners (the_app->toolkit_listeners, source, &e); |
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230 | |
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231 | bonobo_object_unref (BONOBO_OBJECT (source)); |
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232 | g_object_unref (G_OBJECT (aobject)); |
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233 | |
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234 | g_free (event_name); |
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235 | |
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236 | return TRUE; |
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237 | } |
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238 | |
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239 | static void |
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240 | impl_accessibility_application_register_toolkit_event_listener (PortableServer_Servant servant, |
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241 | Accessibility_EventListener listener, |
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242 | const CORBA_char *event_name, |
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243 | CORBA_Environment *ev) |
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244 | { |
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245 | guint spi_listener_id; |
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246 | spi_listener_id = |
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247 | atk_add_global_event_listener (spi_application_toolkit_event_listener, event_name); |
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248 | the_app->toolkit_listeners = g_list_append (the_app->toolkit_listeners, |
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249 | CORBA_Object_duplicate (listener, ev)); |
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250 | #ifdef SPI_DEBUG |
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251 | fprintf (stderr, "registered %d for toolkit events named: %s\n", |
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252 | spi_listener_id, |
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253 | event_name); |
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254 | #endif |
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255 | } |
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256 | |
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257 | static void |
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258 | impl_accessibility_application_register_object_event_listener (PortableServer_Servant servant, |
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259 | Accessibility_EventListener listener, |
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260 | const CORBA_char *event_name, |
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261 | CORBA_Environment *ev) |
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262 | { |
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263 | guint spi_listener_id = 0; |
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264 | const char *toolkit_specific_event_name = |
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265 | lookup_toolkit_event_for_name (event_name); |
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266 | if (toolkit_specific_event_name) |
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267 | { |
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268 | spi_listener_id = |
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269 | atk_add_global_event_listener (spi_application_object_event_listener, |
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270 | toolkit_specific_event_name); |
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271 | the_app->toolkit_listeners = g_list_append (the_app->toolkit_listeners, |
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272 | CORBA_Object_duplicate (listener, ev)); |
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273 | } |
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274 | #ifdef SPI_DEBUG |
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275 | fprintf (stderr, "registered %d for object events named: %s\n", |
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276 | spi_listener_id, |
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277 | event_name); |
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278 | #endif |
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279 | } |
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280 | |
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281 | static void |
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282 | notify_listeners (GList *listeners, SpiAccessible *source, Accessibility_Event *e) |
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283 | { |
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284 | GList *l; |
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285 | CORBA_Environment ev; |
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286 | |
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287 | CORBA_exception_init (&ev); |
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288 | |
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289 | for (l = listeners; l; l = l->next) |
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290 | { |
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291 | Accessibility_EventListener listener = l->data; |
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292 | |
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293 | e->source = bonobo_object_dup_ref (BONOBO_OBJREF (source), &ev); |
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294 | |
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295 | Accessibility_EventListener_notifyEvent (listener, e, &ev); |
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296 | /* |
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297 | * when this (oneway) call completes, the CORBA refcount and |
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298 | * Bonobo_Unknown refcount will be decremented by the recipient |
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299 | */ |
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300 | CORBA_exception_free (&ev); |
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301 | } |
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302 | } |
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303 | |
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304 | static const char * |
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305 | reverse_lookup_name_for_toolkit_event (char *toolkit_specific_name) |
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306 | { |
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307 | const char *generic_name; |
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308 | SpiApplicationClass *klass = g_type_class_peek (SPI_APPLICATION_TYPE); |
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309 | #ifdef SPI_DEBUG |
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310 | fprintf (stderr, "(reverse lookup) looking for %s in hash table.\n", toolkit_specific_name); |
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311 | #endif |
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312 | generic_name = |
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313 | (const char *) g_hash_table_lookup (klass->generic_event_names, toolkit_specific_name); |
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314 | #ifdef SPI_DEBUG |
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315 | fprintf (stderr, "toolkit event %s converted to %s\n", toolkit_specific_name, generic_name); |
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316 | #endif |
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317 | return generic_name; |
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318 | } |
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319 | |
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320 | static void |
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321 | init_toolkit_names (GHashTable **generic_event_names, GHashTable **toolkit_event_names) |
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322 | { |
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323 | *toolkit_event_names = g_hash_table_new (g_str_hash, g_str_equal); |
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324 | *generic_event_names = g_hash_table_new (g_str_hash, g_str_equal); |
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325 | g_hash_table_insert (*toolkit_event_names, |
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326 | "object:property-change", |
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327 | "Gtk:AtkObject:property-change"); |
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328 | g_hash_table_insert (*generic_event_names, |
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329 | "Gtk:AtkObject:property-change", |
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330 | "object:property-change"); |
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331 | #ifdef SPI_DEBUG |
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332 | fprintf (stderr, "inserted spi_selection_changed hash\n"); |
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333 | #endif |
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334 | } |
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335 | |
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336 | static void |
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337 | spi_application_class_init (SpiApplicationClass *klass) |
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338 | { |
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339 | GObjectClass * object_class = (GObjectClass *) klass; |
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340 | POA_Accessibility_Application__epv *epv = &klass->epv; |
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341 | |
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342 | spi_application_parent_class = g_type_class_ref (SPI_ACCESSIBLE_TYPE); |
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343 | |
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344 | object_class->finalize = spi_accessible_application_finalize; |
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345 | |
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346 | epv->_get_toolkitName = impl_accessibility_application_get_toolkit_name; |
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347 | epv->_get_version = impl_accessibility_application_get_version; |
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348 | epv->_get_id = impl_accessibility_application_get_id; |
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349 | epv->_set_id = impl_accessibility_application_set_id; |
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350 | epv->registerToolkitEventListener = impl_accessibility_application_register_toolkit_event_listener; |
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351 | init_toolkit_names (&klass->generic_event_names, &klass->toolkit_event_names); |
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352 | } |
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353 | |
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354 | static void |
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355 | spi_application_init (SpiApplication *application) |
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356 | { |
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357 | application->toolkit_listeners = NULL; |
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358 | the_app = application; |
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359 | } |
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360 | |
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361 | BONOBO_TYPE_FUNC_FULL (SpiApplication, |
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362 | Accessibility_Application, |
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363 | PARENT_TYPE, spi_application); |
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364 | |
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365 | SpiApplication * |
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366 | spi_application_new (AtkObject *app_root) |
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367 | { |
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368 | return SPI_APPLICATION (spi_accessible_construct ( |
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369 | SPI_APPLICATION_TYPE, app_root)); |
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370 | } |
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