atspi/atspi-matchrule.c

   1 /*
   2  * AT-SPI - Assistive Technology Service Provider Interface
   3  * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
   4  *
   5  * Copyright 2001, 2002 Sun Microsystems Inc.,
   6  * Copyright 2001, 2002 Ximian, Inc.
   7  * Copyright 2010, 2011 Novell, Inc.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Library General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Library General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Library General Public
  20  * License along with this library; if not, write to the
  21  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22  * Boston, MA 02111-1307, USA.
  23  */
  24
  25 #include "atspi-private.h"
  26
  27 G_DEFINE_TYPE (AtspiMatchRule, atspi_match_rule, G_TYPE_OBJECT)
  28
  29 static void
  30 atspi_match_rule_init (AtspiMatchRule *match_rule)
  31 {
  32 }
  33
  34 static void
  35 atspi_match_rule_dispose (GObject *object)
  36 {
  37   AtspiMatchRule *rule = ATSPI_MATCH_RULE (object);
  38
  39   if (rule->states)
  40   {
  41     g_object_unref (rule->states);
  42     rule->states = NULL;
  43   }
  44
  45   if (rule->attributes)
  46   {
  47     g_hash_table_unref (rule->attributes);
  48     rule->attributes = NULL;
  49   }
  50
  51   G_OBJECT_CLASS (atspi_match_rule_parent_class)->dispose (object);
  52 }
  53
  54 static void
  55 atspi_match_rule_finalize (GObject *object)
  56 {
  57   AtspiMatchRule *rule = ATSPI_MATCH_RULE (object);
  58
  59   /* TODO: Check that interfaces don't leak */
  60   if (rule->interfaces)
  61     g_array_free (rule->interfaces, TRUE);
  62
  63   if (rule->attributes)
  64     g_hash_table_unref (rule->attributes);
  65
  66   G_OBJECT_CLASS (atspi_match_rule_parent_class)->finalize (object);
  67 }
  68
  69 static void
  70 atspi_match_rule_class_init (AtspiMatchRuleClass *klass)
  71 {
  72   GObjectClass *object_class = G_OBJECT_CLASS (klass);
  73
  74   object_class->dispose = atspi_match_rule_dispose;
  75   object_class->finalize = atspi_match_rule_finalize;
  76 }
  77
  78 /**
  79  * atspi_match_rule_new:
  80  * @states: An #AtspiStateSet specifying the states to match or NULL if none.
  81  * @statematchtype: An #AtspiCollectionMatchType specifying how to interpret
  82  *          @states.
  83  * @attributes: (element-type gchar* gchar*): A #GHashTable specifying
  84  *          attributes to match.
  85  * @attributematchtype: An #AtspiCollectionMatchType specifying how to
  86  *          interpret @attributes.
  87  * @interfaces: (element-type gchar*): An array of interfaces to match, or
  88  *          NULL if not applicable.  Interface names should be specified
  89  *          by their DBus names (org.a11y.Atspi.Accessible,
  90  *          org.a11y.Atspi.Component, etc).
  91  * @interfacematchtype: An #AtspiCollectionMatchType specifying how to
  92  *          interpret @interfaces.
  93  * @roles: (element-type AtspiRole): A #GArray of roles to match, or NULL if
  94  *          not applicable.
  95  * @rolematchtype: An #AtspiCollectionMatchType specifying how to
  96  *          interpret @roles.
  97  * @invert: if #TRUE, the match rule should be denied (inverted); if #FALSE,
  98  *          it should not. For example, if the match rule defines that a match is
  99  *          an object of ROLE_HEADING which has STATE_FOCUSABLE and a click action,
 100  *          inverting it would match all objects that are not of ROLE_HEADING,
 101  *          focusable and clickable at the same time.
 102  *
 103  * Creates a new #AtspiMatchRule with specified @states, @attributes,
 104  * @interfaces, and @roles.
 105  *
 106  * Returns: (transfer full): A new #AtspiMatchRule.
 107  **/
 108 AtspiMatchRule *
 109 atspi_match_rule_new (AtspiStateSet *states,
 110                       AtspiCollectionMatchType statematchtype,
 111                       GHashTable *attributes,
 112                       AtspiCollectionMatchType attributematchtype,
 113                       GArray *roles,
 114                       AtspiCollectionMatchType rolematchtype,
 115                       GArray *interfaces,
 116                       AtspiCollectionMatchType interfacematchtype,
 117                       gboolean invert)
 118 {
 119   AtspiMatchRule *rule = g_object_new (ATSPI_TYPE_MATCH_RULE, NULL);
 120   int i;
 121
 122   if (!rule)
 123     return NULL;
 124
 125   if (states)
 126     rule->states = g_object_ref (states);
 127   rule->statematchtype = statematchtype;
 128
 129   if (attributes)
 130   {
 131     GHashTableIter hash_table_iter;
 132     gchar *key, *value;
 133     rule->attributes = g_hash_table_new_full (g_str_hash, g_str_equal,
 134                                               (GDestroyNotify) g_free,
 135                                               (GDestroyNotify) g_free);
 136     g_hash_table_iter_init (&hash_table_iter, attributes);
 137             while (g_hash_table_iter_next (&hash_table_iter, (gpointer *)&key,
 138                    (gpointer *)&value))
 139       g_hash_table_insert (rule->attributes, g_strdup (key), g_strdup (value));
 140   } else
 141     rule->attributes = NULL;
 142   rule->attributematchtype = attributematchtype;
 143
 144   if (interfaces)
 145     rule->interfaces = g_array_ref (interfaces);
 146   rule->interfacematchtype = interfacematchtype;
 147
 148   if (roles)
 149   {
 150     for (i = 0; i < roles->len; i++)
 151     {
 152       AtspiRole role = g_array_index (roles, AtspiRole, i);
 153       if (role < 128)
 154         rule->roles [role / 32] |= (1 << (role % 32));
 155       else
 156         g_warning ("Atspi: unexpected role %d\n", role);
 157     }
 158   }
 159   else
 160     rule->roles [0] = rule->roles [1] = 0;
 161   rule->rolematchtype = rolematchtype;
 162
 163   rule->invert = invert;
 164
 165   return rule;
 166 }
 167
 168 static void
 169 append_entry (gpointer key, gpointer val, gpointer data)
 170 {
 171   DBusMessageIter *iter = data;
 172   DBusMessageIter iter_entry;
 173
 174   if (!dbus_message_iter_open_container (iter, DBUS_TYPE_DICT_ENTRY, NULL,
 175                                         &iter_entry))
 176     return;
 177   dbus_message_iter_append_basic (&iter_entry, DBUS_TYPE_STRING, &key);
 178   dbus_message_iter_append_basic (&iter_entry, DBUS_TYPE_STRING, &val);
 179   dbus_message_iter_close_container (iter, &iter_entry);
 180 }
 181
 182 gboolean
 183 _atspi_match_rule_marshal (AtspiMatchRule *rule, DBusMessageIter *iter)
 184 {
 185   DBusMessageIter iter_struct, iter_array, iter_dict;
 186   dbus_int32_t states [2];
 187   dbus_int32_t d_statematchtype = rule->statematchtype;
 188   dbus_int32_t d_attributematchtype = rule->attributematchtype;
 189   dbus_int32_t d_interfacematchtype = rule->interfacematchtype;
 190   dbus_uint32_t d_rolematchtype = rule->rolematchtype;
 191   dbus_bool_t d_invert = rule->invert;
 192   gint i;
 193   dbus_int32_t d_role;
 194
 195   if (!dbus_message_iter_open_container (iter, DBUS_TYPE_STRUCT, NULL,
 196                                          &iter_struct))
 197     return FALSE;
 198
 199   /* states */
 200   if (rule->states)
 201   {
 202     states [0] = rule->states->states & 0xffffffff;
 203     states [1] = rule->states->states >> 32;
 204   }
 205   else
 206   {
 207     states [0] = states [1] = 0;
 208   }
 209   dbus_message_iter_open_container (&iter_struct, DBUS_TYPE_ARRAY, "i", &iter_array);
 210   dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_INT32, &states [0]);
 211   dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_INT32, &states [1]);
 212   dbus_message_iter_close_container (&iter_struct, &iter_array);
 213   dbus_message_iter_append_basic (&iter_struct, DBUS_TYPE_INT32, &d_statematchtype);
 214
 215   /* attributes */
 216   if (!dbus_message_iter_open_container (&iter_struct, DBUS_TYPE_ARRAY, "{ss}",
 217                                          &iter_dict))
 218     return FALSE;
 219   g_hash_table_foreach (rule->attributes, append_entry, &iter_dict);
 220   dbus_message_iter_close_container (&iter_struct, &iter_dict);
 221   dbus_message_iter_append_basic (&iter_struct, DBUS_TYPE_INT32, &d_attributematchtype);
 222
 223   if (!dbus_message_iter_open_container (&iter_struct, DBUS_TYPE_ARRAY, "i",
 224       &iter_array))
 225     return FALSE;
 226   d_role = rule->roles [0];
 227   dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_INT32, &d_role);
 228   d_role = rule->roles [1];
 229   dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_INT32, &d_role);
 230   d_role = rule->roles [2];
 231   dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_INT32, &d_role);
 232   d_role = rule->roles [3];
 233   dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_INT32, &d_role);
 234   dbus_message_iter_close_container (&iter_struct, &iter_array);
 235   dbus_message_iter_append_basic (&iter_struct, DBUS_TYPE_INT32,
 236                                   &d_rolematchtype);
 237
 238   /* interfaces */
 239   if (!dbus_message_iter_open_container (&iter_struct, DBUS_TYPE_ARRAY, "s",
 240       &iter_array))
 241     return FALSE;
 242   if (rule->interfaces)
 243   {
 244     for (i = 0; i < rule->interfaces->len; i++)
 245     {
 246       char *val = g_array_index (rule->interfaces, gchar *, i);
 247       dbus_message_iter_append_basic (&iter_array, DBUS_TYPE_STRING, &val);
 248     }
 249   }
 250   dbus_message_iter_close_container (&iter_struct, &iter_array);
 251   dbus_message_iter_append_basic (&iter_struct, DBUS_TYPE_INT32, &d_interfacematchtype);
 252
 253   dbus_message_iter_append_basic (&iter_struct, DBUS_TYPE_BOOLEAN, &d_invert);
 254
 255   dbus_message_iter_close_container (iter, &iter_struct);
 256   return TRUE;
 257 }