[gtk/matthiasc/for-master] inspector: Show accessible object path

[Matthias Clasen <matthiasc src gnome org>]

commit 67411701c62c253b686d3b20cdc38b521e8db62b
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 20 21:56:54 2020 -0400

    inspector: Show accessible object path
    
    Show the object path of the object on the a11y bus,
    this is can be useful information. While we are here,
    make sure that the Inspector does not throw criticals
    when used with GTK_NO_A11Y=1.

 gtk/inspector/a11y.c  | 30 ++++++++++++++++++++++++++++--
 gtk/inspector/a11y.ui | 24 ++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 2 deletions(-)
---
diff --git a/gtk/inspector/a11y.c b/gtk/inspector/a11y.c
index f4c93b3d65..b6cd169e29 100644
--- a/gtk/inspector/a11y.c
+++ b/gtk/inspector/a11y.c
@@ -34,6 +34,9 @@
 #include "gtknoselection.h"
 #include "gtkfilterlistmodel.h"
 #include "gtkboolfilter.h"
+#ifdef G_OS_UNIX
+#include "a11y/gtkatspicontextprivate.h"
+#endif
 
 typedef enum {
   STATE,
@@ -198,6 +201,7 @@ struct _GtkInspectorA11y
 
   GtkWidget *box;
   GtkWidget *role;
+  GtkWidget *path;
   GtkWidget *attributes;
 };
 
@@ -223,6 +227,21 @@ update_role (GtkInspectorA11y *sl)
   g_type_class_unref (eclass);
 }
 
+static void
+update_path (GtkInspectorA11y *sl)
+{
+  const char *path = "—";
+#ifdef G_OS_UNIX
+  GtkATContext *context;
+
+  context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (sl->object));
+  if (GTK_IS_AT_SPI_CONTEXT (context))
+    path = gtk_at_spi_context_get_context_path (GTK_AT_SPI_CONTEXT (context));
+#endif
+
+  gtk_label_set_label (GTK_LABEL (sl->path), path);
+}
+
 extern GType gtk_string_pair_get_type (void);
 
 static void
@@ -244,6 +263,8 @@ update_attributes (GtkInspectorA11y *sl)
   gboolean has_value;
 
   context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (sl->object));
+  if (!context)
+    return;
 
   store = g_list_store_new (G_TYPE_OBJECT);
 
@@ -380,6 +401,7 @@ static void
 refresh_all (GtkInspectorA11y *sl)
 {
   update_role (sl);
+  update_path (sl);
   update_attributes (sl);
 }
 
@@ -394,7 +416,8 @@ gtk_inspector_a11y_set_object (GtkInspectorA11y *sl,
   if (sl->object && GTK_IS_ACCESSIBLE (sl->object))
     {
       context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (sl->object));
-      g_signal_handlers_disconnect_by_func (context, refresh_all, sl);
+      if (context)
+        g_signal_handlers_disconnect_by_func (context, refresh_all, sl);
     }
 
   g_set_object (&sl->object, object);
@@ -405,9 +428,11 @@ gtk_inspector_a11y_set_object (GtkInspectorA11y *sl,
   if (GTK_IS_ACCESSIBLE (object))
     {
       context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (sl->object));
-      g_signal_connect_swapped (context, "state-change", G_CALLBACK (refresh_all), sl);
+      if (context)
+        g_signal_connect_swapped (context, "state-change", G_CALLBACK (refresh_all), sl);
       gtk_stack_page_set_visible (page, TRUE);
       update_role (sl);
+      update_path (sl);
       update_attributes (sl);
     }
   else
@@ -453,6 +478,7 @@ gtk_inspector_a11y_class_init (GtkInspectorA11yClass *klass)
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/inspector/a11y.ui");
   gtk_widget_class_bind_template_child (widget_class, GtkInspectorA11y, box);
   gtk_widget_class_bind_template_child (widget_class, GtkInspectorA11y, role);
+  gtk_widget_class_bind_template_child (widget_class, GtkInspectorA11y, path);
   gtk_widget_class_bind_template_child (widget_class, GtkInspectorA11y, attributes);
 
   gtk_widget_class_bind_template_callback (widget_class, setup_cell_cb);
diff --git a/gtk/inspector/a11y.ui b/gtk/inspector/a11y.ui
index 957453aa2c..6c212e9d86 100644
--- a/gtk/inspector/a11y.ui
+++ b/gtk/inspector/a11y.ui
@@ -28,6 +28,30 @@
             </child>
           </object>
         </child>
+        <child>
+          <object class="GtkBox">
+            <property name="margin-start">10</property>
+            <property name="margin-end">10</property>
+            <property name="margin-top">10</property>
+            <property name="margin-bottom">10</property>
+            <property name="spacing">40</property>
+            <child>
+              <object class="GtkLabel">
+                <property name="label" translatable="yes">Object path</property>
+                <property name="halign">start</property>
+                <property name="valign">baseline</property>
+                <property name="xalign">0.0</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkLabel" id="path">
+                <property name="selectable">1</property>
+                <property name="halign">end</property>
+                <property name="valign">baseline</property>
+              </object>
+            </child>
+          </object>
+        </child>
         <child>
           <object class="GtkSeparator"/>
         </child>