[gtk+/gtk-style-context: 22/490] Add GtkThemingEngine.

[Carlos Garnacho <carlosg src gnome org>]

commit 13c825b21d7a7b1d98aca260a9ae26200a99b68d
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Mar 13 11:23:23 2010 +0100

    Add GtkThemingEngine.
    
    GtkThemingEngine will be the theming engines base class, with default
    implementations for all paint functions, and readonly access to the
    related GtkStyleContext data.

 gtk/Makefile.am        |    2 +
 gtk/gtk.h              |    1 +
 gtk/gtkthemingengine.c |  152 ++++++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkthemingengine.h |   77 ++++++++++++++++++++++++
 4 files changed, 232 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index f1e1321..ae9fcd9 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -305,6 +305,7 @@ gtk_public_h_sources =          \
 	gtktexttag.h		\
 	gtktexttagtable.h	\
 	gtktextview.h		\
+	gtkthemingengine.h	\
 	gtktoggleaction.h	\
 	gtktogglebutton.h	\
 	gtktoggletoolbutton.h	\
@@ -592,6 +593,7 @@ gtk_base_c_sources =            \
 	gtktextutil.c		\
 	gtktextview.c		\
 	gtkthemes.c		\
+	gtkthemingengine.c	\
 	gtktoggleaction.c	\
 	gtktogglebutton.c	\
 	gtktoggletoolbutton.c	\
diff --git a/gtk/gtk.h b/gtk/gtk.h
index 2abc54a..a875257 100644
--- a/gtk/gtk.h
+++ b/gtk/gtk.h
@@ -186,6 +186,7 @@
 #include <gtk/gtktexttag.h>
 #include <gtk/gtktexttagtable.h>
 #include <gtk/gtktextview.h>
+#include <gtk/gtkthemingengine.h>
 #include <gtk/gtktoggleaction.h>
 #include <gtk/gtktogglebutton.h>
 #include <gtk/gtktoggletoolbutton.h>
diff --git a/gtk/gtkthemingengine.c b/gtk/gtkthemingengine.c
new file mode 100644
index 0000000..b3209c8
--- /dev/null
+++ b/gtk/gtkthemingengine.c
@@ -0,0 +1,152 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2010 Carlos Garnacho <carlosg 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include <gtk/gtkthemingengine.h>
+#include <gtk/gtkstylecontext.h>
+#include <gtk/gtkintl.h>
+
+#include "gtkalias.h"
+
+typedef struct GtkThemingEnginePrivate GtkThemingEnginePrivate;
+
+struct GtkThemingEnginePrivate
+{
+  GtkStyleContext *context;
+};
+
+#define GTK_THEMING_ENGINE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_THEMING_ENGINE, GtkThemingEnginePrivate))
+
+G_DEFINE_TYPE (GtkThemingEngine, gtk_theming_engine, G_TYPE_OBJECT)
+
+static void
+gtk_theming_engine_class_init (GtkThemingEngineClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  g_type_class_add_private (object_class, sizeof (GtkThemingEnginePrivate));
+}
+
+static void
+gtk_theming_engine_init (GtkThemingEngine *engine)
+{
+  engine->priv = GTK_THEMING_ENGINE_GET_PRIVATE (engine);
+}
+
+void
+_gtk_theming_engine_set_context (GtkThemingEngine *engine,
+                                 GtkStyleContext  *context)
+{
+  GtkThemingEnginePrivate *priv;
+
+  g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
+  g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
+
+  priv = engine->priv;
+  priv->context = context;
+}
+
+void
+gtk_theming_engine_get_property (GtkThemingEngine *engine,
+                                 const gchar      *property,
+                                 GtkStateType      state,
+                                 GValue           *value)
+{
+  GtkThemingEnginePrivate *priv;
+
+  g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
+  g_return_if_fail (property != NULL);
+  g_return_if_fail (state < GTK_STATE_LAST);
+  g_return_if_fail (value != NULL);
+
+  priv = engine->priv;
+  gtk_style_context_get_property (priv->context, property, state, value);
+}
+
+void
+gtk_theming_engine_get_valist (GtkThemingEngine *engine,
+                               GtkStateType      state,
+                               va_list           args)
+{
+  GtkThemingEnginePrivate *priv;
+
+  g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
+  g_return_if_fail (state < GTK_STATE_LAST);
+
+  priv = engine->priv;
+  gtk_style_context_get_valist (priv->context, state, args);
+}
+
+void
+gtk_theming_engine_get (GtkThemingEngine *engine,
+                        GtkStateType      state,
+                        ...)
+{
+  GtkThemingEnginePrivate *priv;
+  va_list args;
+
+  g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
+  g_return_if_fail (state < GTK_STATE_LAST);
+
+  priv = engine->priv;
+
+  va_start (args, state);
+  gtk_style_context_get_valist (priv->context, state, args);
+  va_end (args);
+}
+
+GtkStateFlags
+gtk_theming_engine_get_state (GtkThemingEngine *engine)
+{
+  GtkThemingEnginePrivate *priv;
+
+  g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0);
+
+  priv = engine->priv;
+  return gtk_style_context_get_state (priv->context);
+}
+
+gboolean
+gtk_theming_engine_is_state_set (GtkThemingEngine *engine,
+                                 GtkStateType      state)
+{
+  GtkThemingEnginePrivate *priv;
+
+  g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0);
+
+  priv = engine->priv;
+  return gtk_style_context_is_state_set (priv->context, state);
+}
+
+G_CONST_RETURN GtkWidgetPath *
+gtk_theming_engine_get_path (GtkThemingEngine *engine)
+{
+  GtkThemingEnginePrivate *priv;
+
+  g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL);
+
+  priv = engine->priv;
+  return gtk_style_context_get_path (priv->context);
+}
+
+#define __GTK_THEMING_ENGINE_C__
+#include "gtkaliasdef.c"
diff --git a/gtk/gtkthemingengine.h b/gtk/gtkthemingengine.h
new file mode 100644
index 0000000..5b7a3d7
--- /dev/null
+++ b/gtk/gtkthemingengine.h
@@ -0,0 +1,77 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2010 Carlos Garnacho <carlosg 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GTK_THEMING_ENGINE_H__
+#define __GTK_THEMING_ENGINE_H__
+
+#include <glib-object.h>
+#include <cairo.h>
+
+#include <gtk/gtkstylecontext.h>
+#include <gtk/gtkwidgetpath.h>
+#include <gtk/gtkenums.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_THEMING_ENGINE         (gtk_theming_engine_get_type ())
+#define GTK_THEMING_ENGINE(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_THEMING_ENGINE, GtkThemingEngine))
+#define GTK_THEMING_ENGINE_CLASS(c)     (G_TYPE_CHECK_CLASS_CAST    ((c), GTK_TYPE_THEMING_ENGINE, GtkThemingEngineClass))
+#define GTK_IS_THEMING_ENGINE(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_THEMING_ENGINE))
+#define GTK_IS_THEMING_ENGINE_CLASS(c)  (G_TYPE_CHECK_CLASS_TYPE    ((c), GTK_TYPE_THEMING_ENGINE))
+#define GTK_THEMING_ENGINE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS  ((o), GTK_TYPE_THEMING_ENGINE, GtkThemingEngineClass))
+
+typedef struct GtkThemingEngine GtkThemingEngine;
+typedef struct GtkThemingEngineClass GtkThemingEngineClass;
+
+struct GtkThemingEngine
+{
+  GObject parent_object;
+  gpointer priv;
+};
+
+struct GtkThemingEngineClass
+{
+  GObjectClass parent_class;
+};
+
+GType gtk_theming_engine_get_type (void) G_GNUC_CONST;
+
+void _gtk_theming_engine_set_context (GtkThemingEngine *engine,
+                                      GtkStyleContext  *context);
+
+void gtk_theming_engine_get_property (GtkThemingEngine *engine,
+                                      const gchar      *property,
+                                      GtkStateType      state,
+                                      GValue           *value);
+void gtk_theming_engine_get_valist   (GtkThemingEngine *engine,
+                                      GtkStateType      state,
+                                      va_list           args);
+void gtk_theming_engine_get          (GtkThemingEngine *engine,
+                                      GtkStateType      state,
+                                      ...) G_GNUC_NULL_TERMINATED;
+
+G_CONST_RETURN GtkWidgetPath * gtk_theming_engine_get_path (GtkThemingEngine *engine);
+
+GtkStateFlags gtk_theming_engine_get_state     (GtkThemingEngine *engine);
+gboolean      gtk__theming_engine_is_state_set (GtkThemingEngine *engine,
+                                                GtkStateType      state);
+
+G_END_DECLS
+
+#endif /* __GTK_THEMING_ENGINE_H__ */