[evince] libview: Emit accessible state-changed signals for form fields

[Joanmarie Diggs <joanied src gnome org>]

commit 45990251754225a6f0154624eaa8e5f9e2094357
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Jul 30 17:50:04 2014 +0200

    libview: Emit accessible state-changed signals for form fields
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733748

 libview/ev-form-field-accessible.c |   32 ++++++++++++++++++++++++++++++++
 libview/ev-form-field-accessible.h |    1 +
 libview/ev-page-accessible.c       |   14 ++++++++++++++
 libview/ev-page-accessible.h       |    2 ++
 libview/ev-view-accessible.c       |   11 +++++++++++
 libview/ev-view-accessible.h       |    3 +++
 libview/ev-view.c                  |    5 +++++
 7 files changed, 68 insertions(+), 0 deletions(-)
---
diff --git a/libview/ev-form-field-accessible.c b/libview/ev-form-field-accessible.c
index 0b38e52..8187d83 100644
--- a/libview/ev-form-field-accessible.c
+++ b/libview/ev-form-field-accessible.c
@@ -32,6 +32,8 @@ struct _EvFormFieldAccessiblePrivate {
        gchar            *name;
        gint              start_index;
        gint              end_index;
+
+       AtkStateSet      *saved_states;
 };
 
 static void ev_form_field_accessible_component_iface_init (AtkComponentIface *iface);
@@ -308,6 +310,33 @@ ev_form_field_accessible_ref_state_set (AtkObject *atk_object)
        return copy_set;
 }
 
+void
+ev_form_field_accessible_update_state (EvFormFieldAccessible *accessible)
+{
+       AtkObject *atk_object;
+       AtkStateSet *states;
+       AtkStateSet *changed_states;
+       gint i;
+
+       atk_object = ATK_OBJECT (accessible);
+       states = ev_form_field_accessible_ref_state_set (atk_object);
+       changed_states = atk_state_set_xor_sets (accessible->priv->saved_states, states);
+       if (changed_states && !atk_state_set_is_empty (accessible->priv->saved_states)) {
+               for (i = 0; i < ATK_STATE_LAST_DEFINED; i++) {
+                       if (atk_state_set_contains_state (changed_states, i))
+                               atk_object_notify_state_change (atk_object, i, atk_state_set_contains_state 
(states, i));
+               }
+       }
+
+       g_object_unref (accessible->priv->saved_states);
+
+       atk_state_set_clear_states (changed_states);
+       accessible->priv->saved_states = atk_state_set_or_sets (changed_states, states);
+
+       g_object_unref (changed_states);
+       g_object_unref (states);
+}
+
 static void
 ev_form_field_accessible_finalize (GObject *object)
 {
@@ -315,6 +344,7 @@ ev_form_field_accessible_finalize (GObject *object)
 
        g_object_unref (priv->form_field);
        g_free (priv->name);
+       g_object_unref (priv->saved_states);
 
        G_OBJECT_CLASS (ev_form_field_accessible_parent_class)->finalize (object);
 }
@@ -353,6 +383,8 @@ ev_form_field_accessible_new (EvPageAccessible *page,
        atk_form_field->priv->page = page;
        atk_form_field->priv->form_field = g_object_ref (form_field);
        atk_form_field->priv->area = *area;
+       atk_form_field->priv->saved_states = atk_state_set_new ();
+       ev_form_field_accessible_update_state (atk_form_field);
 
        return EV_FORM_FIELD_ACCESSIBLE (atk_form_field);
 }
diff --git a/libview/ev-form-field-accessible.h b/libview/ev-form-field-accessible.h
index d60a9c8..572e1ef 100644
--- a/libview/ev-form-field-accessible.h
+++ b/libview/ev-form-field-accessible.h
@@ -52,5 +52,6 @@ EvFormFieldAccessible *ev_form_field_accessible_new (EvPageAccessible *page,
                                                     EvFormField      *form_field,
                                                     EvRectangle      *area);
 EvFormField           *ev_form_field_accessible_get_field (EvFormFieldAccessible *accessible);
+void                   ev_form_field_accessible_update_state (EvFormFieldAccessible *accessible);
 
 #endif  /* __EV_FORM_FIELD_ACCESSIBLE_H__ */
diff --git a/libview/ev-page-accessible.c b/libview/ev-page-accessible.c
index eeed659..6cbccc9 100644
--- a/libview/ev-page-accessible.c
+++ b/libview/ev-page-accessible.c
@@ -1245,3 +1245,17 @@ ev_page_accessible_get_accessible_for_mapping (EvPageAccessible *page_accessible
 
        return NULL;
 }
+
+void
+ev_page_accessible_update_element_state (EvPageAccessible *page_accessible,
+                                        EvMapping        *mapping)
+{
+       AtkObject *child;
+
+       child = ev_page_accessible_get_accessible_for_mapping (page_accessible, mapping);
+       if (!child)
+               return;
+
+       if (EV_IS_FORM_FIELD_ACCESSIBLE (child))
+               ev_form_field_accessible_update_state (EV_FORM_FIELD_ACCESSIBLE (child));
+}
diff --git a/libview/ev-page-accessible.h b/libview/ev-page-accessible.h
index 2c0e242..b59816e 100644
--- a/libview/ev-page-accessible.h
+++ b/libview/ev-page-accessible.h
@@ -53,6 +53,8 @@ EvViewAccessible *ev_page_accessible_get_view_accessible (EvPageAccessible *page
 EvView           *ev_page_accessible_get_view            (EvPageAccessible *page_accessible);
 AtkObject        *ev_page_accessible_get_accessible_for_mapping (EvPageAccessible *page_accessible,
                                                                 EvMapping        *mapping);
+void              ev_page_accessible_update_element_state (EvPageAccessible *page_accessible,
+                                                          EvMapping        *mapping);
 
 #endif  /* __EV_PAGE_ACCESSIBLE_H__ */
 
diff --git a/libview/ev-view-accessible.c b/libview/ev-view-accessible.c
index c7288b4..ffc617c 100644
--- a/libview/ev-view-accessible.c
+++ b/libview/ev-view-accessible.c
@@ -615,3 +615,14 @@ ev_view_accessible_set_focused_element (EvViewAccessible *accessible,
        if (accessible->priv->focused_element)
                atk_object_notify_state_change (accessible->priv->focused_element, ATK_STATE_FOCUSED, TRUE);
 }
+
+void
+ev_view_accessible_update_element_state (EvViewAccessible *accessible,
+                                        EvMapping        *element,
+                                        gint              element_page)
+{
+       EvPageAccessible *page;
+
+       page = g_ptr_array_index (accessible->priv->children, element_page);
+       ev_page_accessible_update_element_state (page, element);
+}
diff --git a/libview/ev-view-accessible.h b/libview/ev-view-accessible.h
index d61540e..14c3ac9 100644
--- a/libview/ev-view-accessible.h
+++ b/libview/ev-view-accessible.h
@@ -68,6 +68,9 @@ gboolean  ev_view_accessible_is_doc_rect_showing (EvViewAccessible *accessible,
 void       ev_view_accessible_set_focused_element (EvViewAccessible *accessible,
                                                   EvMapping        *new_focus,
                                                   gint              new_focus_page);
+void       ev_view_accessible_update_element_state (EvViewAccessible *accessible,
+                                                   EvMapping        *element,
+                                                   gint              element_page);
 
 #endif  /* __EV_VIEW_ACCESSIBLE_H__ */
 
diff --git a/libview/ev-view.c b/libview/ev-view.c
index 4c346e9..4b64e22 100644
--- a/libview/ev-view.c
+++ b/libview/ev-view.c
@@ -2304,6 +2304,11 @@ ev_view_form_field_button_toggle (EvView      *view,
                                                       !state);
        field_button->state = !state;
 
+       if (view->accessible)
+               ev_view_accessible_update_element_state (EV_VIEW_ACCESSIBLE (view->accessible),
+                                                        ev_mapping_list_find (forms_mapping, field),
+                                                        field->page->index);
+
        ev_view_reload_page (view, field->page->index, region);
        cairo_region_destroy (region);
 }