[gtk+/wip/cssnode3: 36/46] cssnode: Make path node create matcher without copying

[Benjamin Otte <otte src gnome org>]

commit 1e83ad30e869950e87da7bfef9658e1d705046a2
Author: Benjamin Otte <otte redhat com>
Date:   Mon Feb 9 11:29:48 2015 +0100

    cssnode: Make path node create matcher without copying
    
    ... the WidgetPath. This uses the functionality introduced in the
    previous commits.

 gtk/gtkcsspathnode.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcsspathnode.c b/gtk/gtkcsspathnode.c
index 1e41a05..659a1c7 100644
--- a/gtk/gtkcsspathnode.c
+++ b/gtk/gtkcsspathnode.c
@@ -36,6 +36,22 @@ gtk_css_path_node_invalidate (GtkCssNode *node)
     }
 }
 
+gboolean
+gtk_css_path_node_real_init_matcher (GtkCssNode     *node,
+                                     GtkCssMatcher  *matcher,
+                                     GtkWidgetPath **path_out)
+{
+  GtkCssPathNode *path_node = GTK_CSS_PATH_NODE (node);
+
+  if (path_node->path == NULL ||
+      gtk_widget_path_length (path_node->path) == 0)
+    return FALSE;
+
+  return _gtk_css_matcher_init (matcher,
+                                path_node->path,
+                                gtk_css_node_get_declaration (node));
+}
+
 static GtkWidgetPath *
 gtk_css_path_node_real_create_widget_path (GtkCssNode *node)
 {
@@ -84,6 +100,7 @@ gtk_css_path_node_class_init (GtkCssPathNodeClass *klass)
   GtkCssNodeClass *node_class = GTK_CSS_NODE_CLASS (klass);
 
   node_class->invalidate = gtk_css_path_node_invalidate;
+  node_class->init_matcher = gtk_css_path_node_real_init_matcher;
   node_class->create_widget_path = gtk_css_path_node_real_create_widget_path;
   node_class->get_widget_path = gtk_css_path_node_real_get_widget_path;
   node_class->get_style_provider = gtk_css_path_node_get_style_provider;