[gtk-theme-engine-clearlooks] Handle treeview column headers in the Adwaita engine

[Carlos Garnacho <carlosg src gnome org>]

commit f3c61945e2244cad9d7aae07f78f0cf82093f210
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jan 19 04:24:11 2011 +0100

    Handle treeview column headers in the Adwaita engine

 src/adwaita_engine.c |   64 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 63 insertions(+), 1 deletions(-)
---
diff --git a/src/adwaita_engine.c b/src/adwaita_engine.c
index b3ae31d..9d5fc62 100644
--- a/src/adwaita_engine.c
+++ b/src/adwaita_engine.c
@@ -376,7 +376,68 @@ adwaita_engine_render_extension (GtkThemingEngine *engine,
 }
 
 static void
-adwaita_engine_class_init (AdwaitaEngineClass * klass)
+adwaita_engine_render_frame (GtkThemingEngine *engine,
+			     cairo_t          *cr,
+			     gdouble           x,
+			     gdouble           y,
+			     gdouble           width,
+			     gdouble           height)
+{
+	const GtkWidgetPath *path;
+	GtkRegionFlags flags = 0;
+	gint len;
+
+	path = gtk_theming_engine_get_path (engine);
+	len = gtk_widget_path_length (path);
+	cairo_save (cr);
+
+#if 0
+	/* FIXME: Replace by this other check when
+	 * the treeview exposes all style info
+	 */
+	if (gtk_widget_path_iter_has_region (path, len - 2,
+					     GTK_STYLE_REGION_COLUMN_HEADER,
+					     &flags))
+#endif
+	if (gtk_widget_path_is_type (path, GTK_TYPE_BUTTON) &&
+	    gtk_widget_path_has_parent (path, GTK_TYPE_TREE_VIEW))
+	{
+		GtkStateFlags state;
+		GdkRGBA color;
+
+		if ((flags & GTK_REGION_LAST) != 0)
+			return;
+
+		/* Column header */
+		if (gtk_theming_engine_get_direction (engine) == GTK_TEXT_DIR_RTL)
+		{
+			cairo_move_to (cr, x + 0.5, y + 2);
+			cairo_line_to (cr, x + 0.5, y + height - 4);
+		}
+		else
+		{
+			cairo_move_to (cr, x + width - 0.5, y + 2);
+			cairo_line_to (cr, x + width - 0.5, y + height - 4);
+		}
+
+		state = gtk_theming_engine_get_state (engine);
+		gtk_theming_engine_get_border_color (engine, state, &color);
+
+		cairo_set_line_width (cr, 1);
+		gdk_cairo_set_source_rgba (cr, &color);
+		cairo_stroke (cr);
+	}
+	else
+	{
+		GTK_THEMING_ENGINE_CLASS (adwaita_engine_parent_class)->render_frame (engine, cr, x, y,
+										      width, height);
+	}
+
+	cairo_restore (cr);
+}
+
+static void
+adwaita_engine_class_init (AdwaitaEngineClass *klass)
 {
 	GtkThemingEngineClass *engine_class = GTK_THEMING_ENGINE_CLASS (klass);
 
@@ -385,6 +446,7 @@ adwaita_engine_class_init (AdwaitaEngineClass * klass)
 	engine_class->render_check = adwaita_engine_render_check;
 	engine_class->render_option = adwaita_engine_render_option;
 	engine_class->render_extension = adwaita_engine_render_extension;
+	engine_class->render_frame = adwaita_engine_render_frame;
 
 	gtk_theming_engine_register_property (ADWAITA_NAMESPACE, NULL,
 					      g_param_spec_boxed ("focus-border-color",