[evince] a11y: expose EvPageAccessible as children of EvViewAccessible

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit c1cdf84022da69ccf1e71c6b816642034d8ac053
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Wed Mar 12 17:17:23 2014 +0100

    a11y: expose EvPageAccessible as children of EvViewAccessible
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724965

 libview/ev-view-accessible.c |   77 ++++++++++++++++++++++++++++++++++++++----
 1 files changed, 70 insertions(+), 7 deletions(-)
---
diff --git a/libview/ev-view-accessible.c b/libview/ev-view-accessible.c
index d79d0d3..d0b9784 100644
--- a/libview/ev-view-accessible.c
+++ b/libview/ev-view-accessible.c
@@ -28,6 +28,7 @@
 #include "ev-view-accessible.h"
 #include "ev-link-accessible.h"
 #include "ev-view-private.h"
+#include "ev-page-accessible.h"
 
 static void ev_view_accessible_text_iface_init      (AtkTextIface      *iface);
 static void ev_view_accessible_action_iface_init    (AtkActionIface    *iface);
@@ -66,6 +67,8 @@ struct _EvViewAccessiblePrivate {
        GHashTable    *links;
 
        gint previous_cursor_page;
+
+       GPtrArray *children;
 };
 
 G_DEFINE_TYPE_WITH_CODE (EvViewAccessible, ev_view_accessible, GTK_TYPE_CONTAINER_ACCESSIBLE,
@@ -90,6 +93,23 @@ clear_cache (EvViewAccessible *accessible)
 }
 
 static void
+clear_children (EvViewAccessible *self)
+{
+       gint i;
+       AtkObject *child;
+
+       if (self->priv->children == NULL)
+               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_view_accessible_finalize (GObject *object)
 {
        EvViewAccessiblePrivate *priv = EV_VIEW_ACCESSIBLE (object)->priv;
@@ -105,6 +125,7 @@ ev_view_accessible_finalize (GObject *object)
        for (i = 0; i < LAST_ACTION; i++)
                g_free (priv->action_descriptions [i]);
        clear_cache (EV_VIEW_ACCESSIBLE (object));
+       clear_children (EV_VIEW_ACCESSIBLE (object));
 
        G_OBJECT_CLASS (ev_view_accessible_parent_class)->finalize (object);
 }
@@ -122,6 +143,31 @@ ev_view_accessible_initialize (AtkObject *obj,
        atk_object_set_role (obj, ATK_ROLE_DOCUMENT_FRAME);
 }
 
+static gint
+ev_view_accessible_get_n_pages (EvViewAccessible *self)
+{
+       return self->priv->children == NULL ? 0 : self->priv->children->len;
+}
+
+static AtkObject *
+ev_view_accessible_ref_child (AtkObject *obj,
+                             gint       i)
+{
+       EvViewAccessible *self;
+
+       g_return_val_if_fail (EV_IS_VIEW_ACCESSIBLE (obj), NULL);
+       self = EV_VIEW_ACCESSIBLE (obj);
+       g_return_val_if_fail (i >= 0 || i < ev_view_accessible_get_n_pages (self), NULL);
+
+       return g_object_ref (g_ptr_array_index (self->priv->children, i));
+}
+
+static gint
+ev_view_accessible_get_n_children (AtkObject *obj)
+{
+       return ev_view_accessible_get_n_pages (EV_VIEW_ACCESSIBLE (obj));
+}
+
 static void
 ev_view_accessible_class_init (EvViewAccessibleClass *klass)
 {
@@ -130,6 +176,8 @@ ev_view_accessible_class_init (EvViewAccessibleClass *klass)
 
        object_class->finalize = ev_view_accessible_finalize;
        atk_class->initialize = ev_view_accessible_initialize;
+       atk_class->get_n_children = ev_view_accessible_get_n_children;
+       atk_class->ref_child = ev_view_accessible_ref_child;
 
        g_type_class_add_private (klass, sizeof (EvViewAccessiblePrivate));
 }
@@ -856,15 +904,9 @@ ev_view_accessible_add_selection (AtkText *text,
 static gint
 ev_view_accessible_get_page_count (AtkDocument *atk_document)
 {
-       EvDocument *ev_document;
-       EvViewAccessiblePrivate* priv;
-
        g_return_val_if_fail (EV_IS_VIEW_ACCESSIBLE (atk_document), -1);
 
-       priv = EV_VIEW_ACCESSIBLE (atk_document)->priv;
-       ev_document = ev_document_model_get_document (priv->model);
-
-       return ev_document == NULL ? -1 : ev_document_get_n_pages (ev_document);
+       return ev_view_accessible_get_n_pages (EV_VIEW_ACCESSIBLE (atk_document));
 }
 
 static gint
@@ -1168,16 +1210,37 @@ page_changed_cb (EvDocumentModel  *model,
 }
 
 static void
+initialize_children (EvViewAccessible *self)
+{
+       gint i;
+       EvPageAccessible *child;
+       gint n_pages;
+       EvDocument *ev_document;
+
+       ev_document = ev_document_model_get_document (self->priv->model);
+       n_pages = ev_document_get_n_pages (ev_document);
+
+       self->priv->children = g_ptr_array_new_full (n_pages, (GDestroyNotify) g_object_unref);
+       for (i = 0; i < n_pages; i++) {
+               child = ev_page_accessible_new (self, i);
+               g_ptr_array_add (self->priv->children, child);
+       }
+}
+
+static void
 document_changed_cb (EvDocumentModel  *model,
                     GParamSpec       *pspec,
                     EvViewAccessible *accessible)
 {
        EvDocument *document = ev_document_model_get_document (model);
 
+       clear_children (accessible);
+
        if (document == NULL)
                return;
 
        clear_cache (accessible);
+       initialize_children (accessible);
 
        /* Inside this callback the document is already loaded. We
         * don't have here an "just before" and "just after"