[evince] EvPageAccessible: use page-cached signal to initialize children

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit 7ccfb40014d7b00bc50f45b9e0ef0515fbd67673
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Fri Jul 25 18:27:50 2014 +0200

    EvPageAccessible: use page-cached signal to initialize children
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733747

 libview/ev-page-accessible.c |   20 ++++++++++++++++++--
 1 files changed, 18 insertions(+), 2 deletions(-)
---
diff --git a/libview/ev-page-accessible.c b/libview/ev-page-accessible.c
index 6cbccc9..214726c 100644
--- a/libview/ev-page-accessible.c
+++ b/libview/ev-page-accessible.c
@@ -324,7 +324,6 @@ 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;
 }
@@ -336,7 +335,6 @@ ev_page_accessible_ref_child (AtkObject *accessible,
        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);
 
@@ -1207,11 +1205,21 @@ ev_page_accessible_component_iface_init (AtkComponentIface *iface)
         iface->get_extents = ev_page_accessible_get_extents;
 }
 
+static void
+page_cached_cb (EvPageCache *cache,
+               gint page,
+               EvPageAccessible *self)
+{
+       if (page == self->priv->page)
+               ev_page_accessible_initialize_children (self);
+}
+
 EvPageAccessible *
 ev_page_accessible_new (EvViewAccessible *view_accessible,
                         gint              page)
 {
         EvPageAccessible *atk_page;
+       EvView *view;
 
        g_return_val_if_fail (EV_IS_VIEW_ACCESSIBLE (view_accessible), NULL);
        g_return_val_if_fail (page >= 0, NULL);
@@ -1221,6 +1229,14 @@ ev_page_accessible_new (EvViewAccessible *view_accessible,
                                 "page", page,
                                 NULL);
 
+       view = ev_page_accessible_get_view (EV_PAGE_ACCESSIBLE (atk_page));
+       if (ev_page_cache_is_page_cached (view->page_cache, page))
+               ev_page_accessible_initialize_children (EV_PAGE_ACCESSIBLE (atk_page));
+       else
+               g_signal_connect (view->page_cache, "page-cached",
+                                 G_CALLBACK (page_cached_cb),
+                                 atk_page);
+
         return EV_PAGE_ACCESSIBLE (atk_page);
 }