libeek: share a single drawing context among each clutter elements

A new class EekClutterDrawingContext maintains the context used to draw actors. Single EekClutterDrawingContext instance is shared by EekClutterKeyboard, EekClutterSection, EekClutterKey, and EekClutterKeyActor.

eek/eek-clutter-drawing-context.c

@@ -0,0 +1,137 @@
+/* 
+ * Copyright (C) 2010 Daiki Ueno <ueno@unixuser.org>
+ * Copyright (C) 2010 Red Hat, Inc.
+ * 
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <string.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif  /* HAVE_CONFIG_H */
+
+#include "eek-clutter-drawing-context.h"
+
+G_DEFINE_TYPE (EekClutterDrawingContext, eek_clutter_drawing_context,
+               G_TYPE_INITIALLY_UNOWNED);
+
+#define EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(obj)                                  \
+    (G_TYPE_INSTANCE_GET_PRIVATE ((obj), EEK_TYPE_CLUTTER_DRAWING_CONTEXT, EekClutterDrawingContextPrivate))
+
+struct _EekClutterDrawingContextPrivate
+{
+    /* outline pointer -> ClutterTexture */
+    GHashTable *outline_textures;
+
+    /* keysym category -> PangoFontDescription * */
+    PangoFontDescription *category_fonts[EEK_KEYSYM_CATEGORY_LAST];
+};
+
+static void
+eek_clutter_drawing_context_dispose (GObject *object)
+{
+    EekClutterDrawingContextPrivate *priv =
+        EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(object);
+    if (priv->outline_textures) {
+        g_hash_table_unref (priv->outline_textures);
+        priv->outline_textures = NULL;
+    }
+}
+
+static void
+eek_clutter_drawing_context_finalize (GObject *object)
+{
+    EekClutterDrawingContextPrivate *priv =
+        EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(object);
+    gint i;
+
+    for (i = 0; i < EEK_KEYSYM_CATEGORY_LAST; i++)
+        pango_font_description_free (priv->category_fonts[i]);
+}
+
+static void
+eek_clutter_drawing_context_class_init (EekClutterDrawingContextClass *klass)
+{
+    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+    g_type_class_add_private (gobject_class,
+                              sizeof (EekClutterDrawingContextPrivate));
+
+    gobject_class->finalize = eek_clutter_drawing_context_finalize;
+}
+
+static void
+eek_clutter_drawing_context_init (EekClutterDrawingContext *self)
+{
+    EekClutterDrawingContextPrivate *priv;
+
+    priv = self->priv = EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(self);
+    priv->outline_textures = g_hash_table_new (g_direct_hash, g_direct_equal);
+    memset (priv->category_fonts, 0, sizeof *priv->category_fonts);
+}
+
+void
+eek_clutter_drawing_context_set_outline_texture
+ (EekClutterDrawingContext *context,
+  EekOutline               *outline,
+  ClutterActor             *texture)
+{
+    EekClutterDrawingContextPrivate *priv =
+        EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(context);
+    g_return_if_fail (priv);
+    g_hash_table_insert (context->priv->outline_textures, outline, texture);
+}
+
+ClutterActor *
+eek_clutter_drawing_context_get_outline_texture
+ (EekClutterDrawingContext *context,
+  EekOutline               *outline)
+{
+    EekClutterDrawingContextPrivate *priv =
+        EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(context);
+    g_return_val_if_fail (priv, NULL);
+    return g_hash_table_lookup (context->priv->outline_textures, outline);
+}
+
+void
+eek_clutter_drawing_context_set_category_font
+ (EekClutterDrawingContext *context,
+  EekKeysymCategory         category,
+  PangoFontDescription     *font)
+{
+    EekClutterDrawingContextPrivate *priv =
+        EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(context);
+    g_return_if_fail (priv);
+    priv->category_fonts[category] = pango_font_description_copy (font);
+}
+
+PangoFontDescription *
+eek_clutter_drawing_context_get_category_font
+ (EekClutterDrawingContext *context,
+  EekKeysymCategory         category)
+{
+    EekClutterDrawingContextPrivate *priv =
+        EEK_CLUTTER_DRAWING_CONTEXT_GET_PRIVATE(context);
+    g_return_val_if_fail (priv, NULL);
+    return priv->category_fonts[category];
+}
+
+EekClutterDrawingContext *
+eek_clutter_drawing_context_new (void)
+{
+    return g_object_new (EEK_TYPE_CLUTTER_DRAWING_CONTEXT, NULL);
+}