expression: Allow passing a this object to bind()

This gives a bit more control over the arguments passed to expressions.

1 files changed, 31 insertions, 7 deletions

diff --git a/gtk/gtkbuilder.c b/gtk/gtkbuilder.c
index 6121d2ed8e..385b78db65 100644
--- a/gtk/gtkbuilder.c
+++ b/gtk/gtkbuilder.c
@@ -1064,11 +1064,13 @@ gtk_builder_create_bindings (GtkBuilder  *builder,
           BindingInfo *info = l->data;
           GObject *source;
 
-          source = _gtk_builder_lookup_object (builder, info->source, info->line, info->col);
+          source = gtk_builder_lookup_object (builder, info->source, info->line, info->col, error);
           if (source)
             g_object_bind_property (source, info->source_property,
                                     info->target, info->target_pspec->name,
                                     info->flags);
+          else
+            error = NULL;
 
           _free_binding_info (info, NULL);
         }
@@ -1076,17 +1078,39 @@ gtk_builder_create_bindings (GtkBuilder  *builder,
         {
           BindingExpressionInfo *info = l->data;
           GtkExpression *expression;
+          GObject *object;
 
-          expression = expression_info_construct (builder, info->expr, error);
-          if (expression == NULL)
+          if (info->object_name)
+            {
+              object = gtk_builder_lookup_object (builder, info->object_name, info->line, info->col, error);
+              if (object == NULL)
+                {
+                  error = NULL;
+                  result = FALSE;
+                }
+            }
+          else if (priv->current_object)
             {
-              g_prefix_error (error, "%s:%d:%d: ", priv->filename, info->line, info->col);
-              error = NULL;
-              result = FALSE;
+              object = priv->current_object;
             }
           else
             {
-              gtk_expression_bind (expression, info->target, info->target_pspec->name);
+              object = info->target;
+            }
+
+          if (object)
+            {
+              expression = expression_info_construct (builder, info->expr, error);
+              if (expression == NULL)
+                {
+                  g_prefix_error (error, "%s:%d:%d: ", priv->filename, info->line, info->col);
+                  error = NULL;
+                  result = FALSE;
+                }
+              else
+                {
+                  gtk_expression_bind (expression, info->target, info->target_pspec->name, object);
+                }
             }
 
           free_binding_expression_info (info);