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Expose links as AtkObject children of the page
https://bugzilla.gnome.org/show_bug.cgi?id=728475
This commit is contained in:
Joanmarie Diggs
parent
5c2ce4e9d8
commit
004b19922e
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@ -32,6 +32,8 @@ struct _EvLinkAccessiblePrivate {
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EvRectangle area;
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EvHyperlink *hyperlink;
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gchar *name;
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};
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struct _EvHyperlink {
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@ -187,10 +189,71 @@ ev_hyperlink_init (EvHyperlink *link)
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static void ev_link_accessible_hyperlink_impl_iface_init (AtkHyperlinkImplIface *iface);
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static void ev_link_accessible_action_interface_init (AtkActionIface *iface);
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static void ev_link_accessible_component_iface_init (AtkComponentIface *iface);
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G_DEFINE_TYPE_WITH_CODE (EvLinkAccessible, ev_link_accessible, ATK_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_HYPERLINK_IMPL, ev_link_accessible_hyperlink_impl_iface_init)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, ev_link_accessible_action_interface_init))
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, ev_link_accessible_action_interface_init)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, ev_link_accessible_component_iface_init))
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static const gchar *
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ev_link_accessible_get_name (AtkObject *atk_object)
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{
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EvLinkAccessiblePrivate *priv;
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gint start_index;
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gint end_index;
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priv = EV_LINK_ACCESSIBLE (atk_object)->priv;
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if (priv->name)
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return priv->name;
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start_index = ev_hyperlink_get_start_index (ATK_HYPERLINK (priv->hyperlink));
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end_index = ev_hyperlink_get_end_index (ATK_HYPERLINK (priv->hyperlink));
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priv->name = atk_text_get_text (ATK_TEXT (atk_object_get_parent (atk_object)), start_index, end_index);
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return priv->name;
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}
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static AtkObject *
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ev_link_accessible_get_parent (AtkObject *atk_object)
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{
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EvLinkAccessiblePrivate *priv = EV_LINK_ACCESSIBLE (atk_object)->priv;
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return ATK_OBJECT (priv->page);
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}
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static AtkStateSet *
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ev_link_accessible_ref_state_set (AtkObject *atk_object)
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{
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AtkStateSet *state_set;
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AtkStateSet *copy_set;
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AtkStateSet *page_accessible_state_set;
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EvLinkAccessible *self;
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EvViewAccessible *view_accessible;
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EvView *view;
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gint page;
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self = EV_LINK_ACCESSIBLE (atk_object);
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state_set = ATK_OBJECT_CLASS (ev_link_accessible_parent_class)->ref_state_set (atk_object);
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atk_state_set_clear_states (state_set);
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page_accessible_state_set = atk_object_ref_state_set (ATK_OBJECT (self->priv->page));
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copy_set = atk_state_set_or_sets (state_set, page_accessible_state_set);
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view_accessible = ev_page_accessible_get_view_accessible (self->priv->page);
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page = ev_page_accessible_get_page (self->priv->page);
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if (!ev_view_accessible_is_doc_rect_showing (view_accessible, page, &self->priv->area))
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atk_state_set_remove_state (copy_set, ATK_STATE_SHOWING);
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view = ev_page_accessible_get_view (self->priv->page);
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if (!view->focused_element || view->focused_element->data != self->priv->link)
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atk_state_set_remove_state (copy_set, ATK_STATE_FOCUSED);
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g_object_unref (state_set);
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g_object_unref (page_accessible_state_set);
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return copy_set;
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}
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static void
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ev_link_accessible_finalize (GObject *object)
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@ -198,6 +261,7 @@ ev_link_accessible_finalize (GObject *object)
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EvLinkAccessible *link = EV_LINK_ACCESSIBLE (object);
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g_clear_object (&link->priv->hyperlink);
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g_free (link->priv->name);
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G_OBJECT_CLASS (ev_link_accessible_parent_class)->finalize (object);
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}
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@ -206,15 +270,21 @@ static void
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ev_link_accessible_class_init (EvLinkAccessibleClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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AtkObjectClass *atk_class = ATK_OBJECT_CLASS (klass);
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object_class->finalize = ev_link_accessible_finalize;
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g_type_class_add_private (klass, sizeof (EvLinkAccessiblePrivate));
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atk_class->get_parent = ev_link_accessible_get_parent;
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atk_class->get_name = ev_link_accessible_get_name;
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atk_class->ref_state_set = ev_link_accessible_ref_state_set;
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}
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static void
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ev_link_accessible_init (EvLinkAccessible *link)
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{
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atk_object_set_role (ATK_OBJECT (link), ATK_ROLE_LINK);
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link->priv = G_TYPE_INSTANCE_GET_PRIVATE (link, EV_TYPE_LINK_ACCESSIBLE, EvLinkAccessiblePrivate);
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}
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@ -286,6 +356,55 @@ ev_link_accessible_action_interface_init (AtkActionIface *iface)
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iface->get_name = ev_link_accessible_action_get_name;
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}
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static void
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ev_link_accessible_get_extents (AtkComponent *atk_component,
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gint *x,
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gint *y,
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gint *width,
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gint *height,
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AtkCoordType coord_type)
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{
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EvLinkAccessible *self;
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EvViewAccessible *view_accessible;
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gint page;
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EvRectangle atk_rect;
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self = EV_LINK_ACCESSIBLE (atk_component);
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view_accessible = ev_page_accessible_get_view_accessible (self->priv->page);
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page = ev_page_accessible_get_page (self->priv->page);
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_transform_doc_rect_to_atk_rect (view_accessible, page, &self->priv->area, &atk_rect, coord_type);
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*x = atk_rect.x1;
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*y = atk_rect.y1;
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*width = atk_rect.x2 - atk_rect.x1;
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*height = atk_rect.y2 - atk_rect.y1;
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}
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static gboolean
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ev_link_accessible_grab_focus (AtkComponent *atk_component)
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{
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EvLinkAccessible *self;
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EvView *view;
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EvMappingList *link_mapping;
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EvMapping *mapping;
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gint page;
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self = EV_LINK_ACCESSIBLE (atk_component);
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view = ev_page_accessible_get_view (self->priv->page);
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page = ev_page_accessible_get_page (self->priv->page);
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link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
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mapping = ev_mapping_list_find (link_mapping, self->priv->link);
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_ev_view_set_focused_element (view, mapping, page);
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return TRUE;
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}
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static void
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ev_link_accessible_component_iface_init (AtkComponentIface *iface)
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{
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iface->get_extents = ev_link_accessible_get_extents;
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iface->grab_focus = ev_link_accessible_grab_focus;
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}
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EvLinkAccessible *
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ev_link_accessible_new (EvPageAccessible *page,
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EvLink *link,
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@ -31,6 +31,8 @@ struct _EvPageAccessiblePrivate {
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EvViewAccessible *view_accessible;
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gint page;
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GHashTable *links;
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GPtrArray *children;
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gboolean children_initialized;
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};
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@ -77,12 +79,87 @@ ev_page_accessible_get_parent (AtkObject *obj)
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return ATK_OBJECT (self->priv->view_accessible);
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}
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static gint
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compare_mappings (EvMapping *a, EvMapping *b)
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{
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gdouble dx, dy;
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/* Very rough heuristic for simple, non-tagged PDFs. */
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dy = a->area.y1 - b->area.y1;
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dx = a->area.x1 - b->area.x1;
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return ABS (dy) > 10 ? dy : dx;
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}
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static void
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ev_page_accessible_initialize_children (EvPageAccessible *self)
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{
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EvView *view;
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EvMappingList *links;
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GList *children = NULL;
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GList *list;
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if (self->priv->children_initialized)
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return;
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view = ev_page_accessible_get_view (self);
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if (!ev_page_cache_is_page_cached (view->page_cache, self->priv->page))
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return;
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self->priv->children_initialized = TRUE;
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links = ev_page_cache_get_link_mapping (view->page_cache, self->priv->page);
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if (!links)
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return;
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children = g_list_copy (ev_mapping_list_get_list (links));
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children = g_list_sort (children, (GCompareFunc) compare_mappings);
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self->priv->children = g_ptr_array_new_full (g_list_length (children), (GDestroyNotify) g_object_unref);
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for (list = children; list && list->data; list = list->next) {
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EvMapping *mapping = list->data;
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AtkObject *child = NULL;
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if (links && ev_mapping_list_find (links, mapping->data)) {
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EvLinkAccessible *link = ev_link_accessible_new (self, EV_LINK (mapping->data), &mapping->area);
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AtkHyperlink *atk_link = atk_hyperlink_impl_get_hyperlink (ATK_HYPERLINK_IMPL (link));
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child = atk_hyperlink_get_object (atk_link, 0);
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}
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if (child)
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g_ptr_array_add (self->priv->children, child);
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}
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g_list_free (children);
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}
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static void
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clear_children (EvPageAccessible *self)
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{
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gint i;
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AtkObject *child;
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if (!self->priv->children)
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return;
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for (i = 0; i < self->priv->children->len; i++) {
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child = g_ptr_array_index (self->priv->children, i);
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atk_object_notify_state_change (child, ATK_STATE_DEFUNCT, TRUE);
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}
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g_clear_pointer (&self->priv->children, g_ptr_array_unref);
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}
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static void
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ev_page_accessible_finalize (GObject *object)
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{
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EvPageAccessiblePrivate *priv = EV_PAGE_ACCESSIBLE (object)->priv;
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g_clear_pointer (&priv->links, (GDestroyNotify)g_hash_table_destroy);
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clear_children (EV_PAGE_ACCESSIBLE (object));
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G_OBJECT_CLASS (ev_page_accessible_parent_class)->finalize (object);
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}
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@ -230,6 +307,31 @@ ev_page_accessible_ref_state_set (AtkObject *accessible)
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return copy_set;
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}
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static gint
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ev_page_accessible_get_n_children (AtkObject *accessible)
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{
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EvPageAccessible *self;
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self = EV_PAGE_ACCESSIBLE (accessible);
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ev_page_accessible_initialize_children (self);
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return self->priv->children == NULL ? 0 : self->priv->children->len;
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}
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static AtkObject *
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ev_page_accessible_ref_child (AtkObject *accessible,
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gint i)
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{
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EvPageAccessible *self;
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self = EV_PAGE_ACCESSIBLE (accessible);
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ev_page_accessible_initialize_children (self);
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g_return_val_if_fail (i >= 0 || i < self->priv->children->len, NULL);
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return g_object_ref (g_ptr_array_index (self->priv->children, i));
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}
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static void
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ev_page_accessible_class_init (EvPageAccessibleClass *klass)
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{
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@ -241,6 +343,8 @@ ev_page_accessible_class_init (EvPageAccessibleClass *klass)
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atk_class->get_parent = ev_page_accessible_get_parent;
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atk_class->ref_relation_set = ev_page_accessible_ref_relation_set;
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atk_class->ref_state_set = ev_page_accessible_ref_state_set;
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atk_class->get_n_children = ev_page_accessible_get_n_children;
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atk_class->ref_child = ev_page_accessible_ref_child;
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g_object_class->get_property = ev_page_accessible_get_property;
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g_object_class->set_property = ev_page_accessible_set_property;
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