[evince] libview: Implement AtkComponent for pages

[Joanmarie Diggs <joanied src gnome org>]

commit 7d1bf5a975ea43cf4cf1447a7d8e83163ce5033d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Apr 22 07:54:23 2014 -0400

    libview: Implement AtkComponent for pages
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728673

 libview/ev-page-accessible.c |   38 ++++++++++++++++++++++++++++++++++++++
 libview/ev-view-accessible.c |   36 ++++++++++++++++++++++++++++++++++++
 libview/ev-view-accessible.h |    5 +++++
 3 files changed, 79 insertions(+), 0 deletions(-)
---
diff --git a/libview/ev-page-accessible.c b/libview/ev-page-accessible.c
index ac322c1..b6e4278 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 185e335..0af047f 100644
--- a/libview/ev-view-accessible.c
+++ b/libview/ev-view-accessible.c
@@ -501,3 +501,39 @@ 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 32798c3..0e6314c 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__ */