cssnode: Change style-changed signal

Instead of having old and new style, now have a GtkCssStyleChange opaque
object that will compute the changes you are interested in for you.

This simplifies change signal handlers quite a bit and avoids lots of
repeated computation in every signal handler.

1 files changed, 51 insertions, 0 deletions

diff --git a/gtk/gtkcssstylechangeprivate.h b/gtk/gtkcssstylechangeprivate.h
new file mode 100644
index 0000000000..2fb2aa3c70
--- /dev/null
+++ b/gtk/gtkcssstylechangeprivate.h
@@ -0,0 +1,51 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2015 Benjamin Otte <otte@gnome.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GTK_CSS_STYLE_CHANGE_PRIVATE_H__
+#define __GTK_CSS_STYLE_CHANGE_PRIVATE_H__
+
+#include "gtkcssstyleprivate.h"
+
+G_BEGIN_DECLS
+
+typedef struct _GtkCssStyleChange GtkCssStyleChange;
+
+struct _GtkCssStyleChange {
+  GtkCssStyle   *old_style;
+  GtkCssStyle   *new_style;
+
+  guint          n_compared;
+
+  GtkCssAffects  affects;
+  guint          has_change :1;
+};
+
+void            gtk_css_style_change_init               (GtkCssStyleChange      *change,
+                                                         GtkCssStyle            *old_style,
+                                                         GtkCssStyle            *new_style);
+void            gtk_css_style_change_finish             (GtkCssStyleChange      *change);
+
+GtkCssStyle *   gtk_css_style_change_get_old_style      (GtkCssStyleChange      *change);
+GtkCssStyle *   gtk_css_style_change_get_new_style      (GtkCssStyleChange      *change);
+
+gboolean        gtk_css_style_change_has_change         (GtkCssStyleChange      *change);
+gboolean        gtk_css_style_change_affects            (GtkCssStyleChange      *change,
+                                                         GtkCssAffects           affects);
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_STYLE_CHANGE_PRIVATE_H__ */