[evince] ev-properties-view: Add accessible relations between the labels

[Joanmarie Diggs <joanied src gnome org>]

commit 7982b946c50bf904144bfd066602c6d6876805ed
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri May 8 11:46:42 2015 -0400

    ev-properties-view: Add accessible relations between the labels
    
    The properties view grid consists of two columns, the left column
    contains a GtkLabel which describes, or "labels," the property
    displayed in the GtkLabel in the right column. The lack of accessible
    relations between the labels in each column means Orca has no clue
    that it should also present the label on the left when the user
    Tabs amongst the labels on the right, and that it should not treat
    labels on the left as static text.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=749127

 properties/ev-properties-view.c |   38 ++++++++++++++++++++++++--------------
 1 files changed, 24 insertions(+), 14 deletions(-)
---
diff --git a/properties/ev-properties-view.c b/properties/ev-properties-view.c
index aa91538..1a6a78e 100644
--- a/properties/ev-properties-view.c
+++ b/properties/ev-properties-view.c
@@ -158,32 +158,33 @@ set_property (EvPropertiesView *properties,
              const gchar      *text,
              gint             *row)
 {
-       GtkWidget *label;
+       GtkWidget *property_label = NULL;
+       GtkWidget *value_label = NULL;
        gchar     *markup;
        gchar     *valid_text;
 
        if (!properties->labels[property]) {
-               label = gtk_label_new (NULL);
-               g_object_set (G_OBJECT (label), "xalign", 0.0, NULL);
+               property_label = gtk_label_new (NULL);
+               g_object_set (G_OBJECT (property_label), "xalign", 0.0, NULL);
                markup = g_strdup_printf ("<b>%s</b>", _(properties_info[property].label));
-               gtk_label_set_markup (GTK_LABEL (label), markup);
+               gtk_label_set_markup (GTK_LABEL (property_label), markup);
                g_free (markup);
 
-               gtk_grid_attach (grid, label, 0, *row, 1, 1);
-               gtk_widget_show (label);
+               gtk_grid_attach (grid, property_label, 0, *row, 1, 1);
+               gtk_widget_show (property_label);
        }
 
        if (!properties->labels[property]) {
-               label = gtk_label_new (NULL);
+               value_label = gtk_label_new (NULL);
 
-               g_object_set (G_OBJECT (label),
+               g_object_set (G_OBJECT (value_label),
                              "xalign", 0.0,
                              "width_chars", 25,
                              "selectable", TRUE,
                              "ellipsize", PANGO_ELLIPSIZE_END,
                              NULL);
        } else {
-               label = properties->labels[property];
+               value_label = properties->labels[property];
        }
 
        if (text == NULL || text[0] == '\000') {
@@ -193,20 +194,29 @@ set_property (EvPropertiesView *properties,
                   Keywords: None
                */
                markup = g_markup_printf_escaped ("<i>%s</i>", _("None"));
-               gtk_label_set_markup (GTK_LABEL (label), markup);
+               gtk_label_set_markup (GTK_LABEL (value_label), markup);
                g_free (markup);
        } else {
                valid_text = make_valid_utf8 (text ? text : "");
-               gtk_label_set_text (GTK_LABEL (label), valid_text);
+               gtk_label_set_text (GTK_LABEL (value_label), valid_text);
                g_free (valid_text);
        }
 
        if (!properties->labels[property]) {
-               gtk_grid_attach (grid, label, 1, *row, 1, 1);
-               properties->labels[property] = label;
+               gtk_grid_attach (grid, value_label, 1, *row, 1, 1);
+               properties->labels[property] = value_label;
        }
 
-       gtk_widget_show (label);
+       if (property_label && value_label) {
+               atk_object_add_relationship (gtk_widget_get_accessible (property_label),
+                                            ATK_RELATION_LABEL_FOR,
+                                            gtk_widget_get_accessible (value_label));
+               atk_object_add_relationship (gtk_widget_get_accessible (value_label),
+                                            ATK_RELATION_LABELLED_BY,
+                                            gtk_widget_get_accessible (property_label));
+       }
+
+       gtk_widget_show (value_label);
 
        *row += 1;
 }