libview: Implement AtkComponent for pages

https://bugzilla.gnome.org/show_bug.cgi?id=728673

origin commit:
https://git.gnome.org/browse/evince/commit/?h=gnome-3-14&id=7d1bf5a

3 files changed, 79 insertions, 0 deletions

diff --git a/libview/ev-page-accessible.c b/libview/ev-page-accessible.c
index 2fcc0680..99e970a1 100644
--- a/libview/ev-page-accessible.c
+++ b/libview/ev-page-accessible.c
@@ -40,10 +40,12 @@ enum {
 	PROP_PAGE,
 };
 
+static void ev_page_accessible_component_iface_init (AtkComponentIface *iface);
 static void ev_page_accessible_hypertext_iface_init (AtkHypertextIface *iface);
 static void ev_page_accessible_text_iface_init (AtkTextIface *iface);
 
 G_DEFINE_TYPE_WITH_CODE (EvPageAccessible, ev_page_accessible, ATK_TYPE_OBJECT,
+			 G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, ev_page_accessible_component_iface_init)
 			 G_IMPLEMENT_INTERFACE (ATK_TYPE_HYPERTEXT, ev_page_accessible_hypertext_iface_init)
 			 G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, ev_page_accessible_text_iface_init))
 
@@ -1054,6 +1056,42 @@ ev_page_accessible_hypertext_iface_init (AtkHypertextIface *iface)
 	iface->get_link_index = ev_page_accessible_get_link_index;
 }
 
+static void
+ev_page_accessible_get_extents (AtkComponent *atk_component,
+				gint         *x,
+				gint         *y,
+				gint         *width,
+				gint         *height,
+				AtkCoordType coord_type)
+{
+	EvPageAccessible *self;
+	EvView *view;
+	GdkRectangle page_area;
+	GtkBorder border;
+	EvRectangle doc_rect, atk_rect;
+
+	self = EV_PAGE_ACCESSIBLE (atk_component);
+	view = ev_page_accessible_get_view (self);
+	ev_view_get_page_extents (view, self->priv->page, &page_area, &border);
+
+	doc_rect.x1 = page_area.x;
+	doc_rect.y1 = page_area.y;
+	doc_rect.x2 = page_area.x + page_area.width;
+	doc_rect.y2 = page_area.y + page_area.height;
+	_transform_doc_rect_to_atk_rect (self->priv->view_accessible, self->priv->page, &doc_rect, &atk_rect, coord_type);
+
+	*x = atk_rect.x1;
+	*y = atk_rect.y1;
+	*width = atk_rect.x2 - atk_rect.x1;
+	*height = atk_rect.y2 - atk_rect.y1;
+}
+
+static void
+ev_page_accessible_component_iface_init (AtkComponentIface *iface)
+{
+        iface->get_extents = ev_page_accessible_get_extents;
+}
+
 EvPageAccessible *
 ev_page_accessible_new (EvViewAccessible *view_accessible,
                         gint              page)
diff --git a/libview/ev-view-accessible.c b/libview/ev-view-accessible.c
index 2932c5e1..c063e366 100644
--- a/libview/ev-view-accessible.c
+++ b/libview/ev-view-accessible.c
@@ -493,3 +493,39 @@ ev_view_accessible_get_relevant_page (EvViewAccessible *accessible)
 
 	return get_relevant_page (view);
 }
+
+void
+_transform_doc_rect_to_atk_rect (EvViewAccessible *accessible,
+				 gint              page,
+				 EvRectangle      *doc_rect,
+				 EvRectangle      *atk_rect,
+				 AtkCoordType      coord_type)
+{
+	EvView *view;
+	GdkRectangle view_rect;
+	GtkWidget *widget, *toplevel;
+	gint x_widget, y_widget;
+
+	view = EV_VIEW (gtk_accessible_get_widget (GTK_ACCESSIBLE (accessible)));
+	_ev_view_transform_doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
+	view_rect.x -= view->scroll_x;
+	view_rect.y -= view->scroll_y;
+
+	widget = GTK_WIDGET (view);
+	toplevel = gtk_widget_get_toplevel (widget);
+	gtk_widget_translate_coordinates (widget, toplevel, 0, 0, &x_widget, &y_widget);
+	view_rect.x += x_widget;
+	view_rect.y += y_widget;
+
+	if (coord_type == ATK_XY_SCREEN) {
+		gint x_window, y_window;
+		gdk_window_get_origin (gtk_widget_get_window (toplevel), &x_window, &y_window);
+		view_rect.x += x_window;
+		view_rect.y += y_window;
+	}
+
+	atk_rect->x1 = view_rect.x;
+	atk_rect->y1 = view_rect.y;
+	atk_rect->x2 = view_rect.x + view_rect.width;
+	atk_rect->y2 = view_rect.y + view_rect.height;
+}
diff --git a/libview/ev-view-accessible.h b/libview/ev-view-accessible.h
index 38af95a4..34369682 100644
--- a/libview/ev-view-accessible.h
+++ b/libview/ev-view-accessible.h
@@ -54,6 +54,11 @@ void       ev_view_accessible_set_model (EvViewAccessible *accessible,
                                          EvDocumentModel  *model);
 gint       ev_view_accessible_get_n_pages (EvViewAccessible *accessible);
 gint       ev_view_accessible_get_relevant_page (EvViewAccessible *accessible);
+void       _transform_doc_rect_to_atk_rect (EvViewAccessible *accessible,
+					    gint              page,
+					    EvRectangle      *doc_rect,
+					    EvRectangle      *atk_rect,
+					    AtkCoordType      coord_type);
 
 #endif  /* __EV_VIEW_ACCESSIBLE_H__ */