1 files changed, 104 insertions, 0 deletions
diff --git a/libview/ev-page-accessible.c b/libview/ev-page-accessible.c
index 99e970a1..d3c72e3e 100644
--- a/libview/ev-page-accessible.c
+++ b/libview/ev-page-accessible.c
@@ -31,6 +31,8 @@ struct _EvPageAccessiblePrivate {
 EvViewAccessible *view_accessible;
 gint page;
 GHashTable *links;
+ GPtrArray *children;
+ gboolean children_initialized;
 };
 
 
@@ -77,12 +79,87 @@ ev_page_accessible_get_parent (AtkObject *obj)
 return ATK_OBJECT (self->priv->view_accessible);
 }
 
+static gint
+compare_mappings (EvMapping *a, EvMapping *b)
+{
+ gdouble dx, dy;
+
+ /* Very rough heuristic for simple, non-tagged PDFs. */
+
+ dy = a->area.y1 - b->area.y1;
+ dx = a->area.x1 - b->area.x1;
+
+ return ABS (dy) > 10 ? dy : dx;
+}
+
+static void
+ev_page_accessible_initialize_children (EvPageAccessible *self)
+{
+ EvView *view;
+ EvMappingList *links;
+ GList *children = NULL;
+ GList *list;
+
+ if (self->priv->children_initialized)
+ return;
+
+ view = ev_page_accessible_get_view (self);
+ if (!ev_page_cache_is_page_cached (view->page_cache, self->priv->page))
+ return;
+
+ self->priv->children_initialized = TRUE;
+
+ links = ev_page_cache_get_link_mapping (view->page_cache, self->priv->page);
+ if (!links)
+ return;
+
+ children = g_list_copy (ev_mapping_list_get_list (links));
+
+ children = g_list_sort (children, (GCompareFunc) compare_mappings);
+ self->priv->children = g_ptr_array_new_full (g_list_length (children), (GDestroyNotify) g_object_unref);
+
+ for (list = children; list && list->data; list = list->next) {
+ EvMapping *mapping = list->data;
+ AtkObject *child = NULL;
+
+ if (links && ev_mapping_list_find (links, mapping->data)) {
+ EvLinkAccessible *link = ev_link_accessible_new (self, EV_LINK (mapping->data), &mapping->area);
+ AtkHyperlink *atk_link = atk_hyperlink_impl_get_hyperlink (ATK_HYPERLINK_IMPL (link));
+
+ child = atk_hyperlink_get_object (atk_link, 0);
+ }
+
+ if (child)
+ g_ptr_array_add (self->priv->children, child);
+ }
+
+ g_list_free (children);
+}
+
+static void
+clear_children (EvPageAccessible *self)
+{
+ gint i;
+ AtkObject *child;
+
+ if (!self->priv->children)
+ return;
+
+ for (i = 0; i < self->priv->children->len; i++) {
+ child = g_ptr_array_index (self->priv->children, i);
+ atk_object_notify_state_change (child, ATK_STATE_DEFUNCT, TRUE);
+ }
+
+ g_clear_pointer (&self->priv->children, g_ptr_array_unref);
+}
+
 static void
 ev_page_accessible_finalize (GObject *object)
 {
 EvPageAccessiblePrivate *priv = EV_PAGE_ACCESSIBLE (object)->priv;
 
 g_clear_pointer (&priv->links, (GDestroyNotify)g_hash_table_destroy);
+ clear_children (EV_PAGE_ACCESSIBLE (object));
 
 G_OBJECT_CLASS (ev_page_accessible_parent_class)->finalize (object);
 }
@@ -230,6 +307,31 @@ ev_page_accessible_ref_state_set (AtkObject *accessible)
 return copy_set;
 }
 
+static gint
+ev_page_accessible_get_n_children (AtkObject *accessible)
+{
+ EvPageAccessible *self;
+
+ self = EV_PAGE_ACCESSIBLE (accessible);
+ ev_page_accessible_initialize_children (self);
+
+ return self->priv->children == NULL ? 0 : self->priv->children->len;
+}
+
+static AtkObject *
+ev_page_accessible_ref_child (AtkObject *accessible,
+ gint i)
+{
+ EvPageAccessible *self;
+
+ self = EV_PAGE_ACCESSIBLE (accessible);
+ ev_page_accessible_initialize_children (self);
+
+ g_return_val_if_fail (i >= 0 || i < self->priv->children->len, NULL);
+
+ return g_object_ref (g_ptr_array_index (self->priv->children, i));
+}
+
 static void
 ev_page_accessible_class_init (EvPageAccessibleClass *klass)
 {
@@ -241,6 +343,8 @@ ev_page_accessible_class_init (EvPageAccessibleClass *klass)
 atk_class->get_parent = ev_page_accessible_get_parent;
 atk_class->ref_relation_set = ev_page_accessible_ref_relation_set;
 atk_class->ref_state_set = ev_page_accessible_ref_state_set;
+ atk_class->get_n_children = ev_page_accessible_get_n_children;
+ atk_class->ref_child = ev_page_accessible_ref_child;
 
 g_object_class->get_property = ev_page_accessible_get_property;
 g_object_class->set_property = ev_page_accessible_set_property;