cssvalue: Add a css value for engines

gtk/gtkcssenginevalue.c

@@ -0,0 +1,127 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2011 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "gtkcssenginevalueprivate.h"
+
+#include "gtkstylepropertyprivate.h"
+
+struct _GtkCssValue {
+  GTK_CSS_VALUE_BASE
+  GtkThemingEngine *engine;
+};
+
+static void
+gtk_css_value_engine_free (GtkCssValue *value)
+{
+  g_object_unref (value->engine);
+
+  g_slice_free (GtkCssValue, value);
+}
+
+static gboolean
+gtk_css_value_engine_equal (const GtkCssValue *value1,
+                            const GtkCssValue *value2)
+{
+  return value1->engine == value2->engine;
+}
+
+static GtkCssValue *
+gtk_css_value_engine_transition (GtkCssValue *start,
+                                 GtkCssValue *end,
+                                 double       progress)
+{
+  return NULL;
+}
+
+static void
+gtk_css_value_engine_print (const GtkCssValue *value,
+                            GString           *string)
+{
+  char *name;
+
+  g_object_get (value->engine, "name", &name, NULL);
+
+  if (name)
+    g_string_append (string, name);
+  else
+    g_string_append (string, "none");
+
+  g_free (name);
+}
+
+static const GtkCssValueClass GTK_CSS_VALUE_ENGINE = {
+  gtk_css_value_engine_free,
+  gtk_css_value_engine_equal,
+  gtk_css_value_engine_transition,
+  gtk_css_value_engine_print
+};
+
+GtkCssValue *
+_gtk_css_engine_value_new (GtkThemingEngine *engine)
+{
+  GtkCssValue *result;
+
+  g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL);
+
+  result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_ENGINE);
+  result->engine = g_object_ref (engine);
+
+  return result;
+}
+
+GtkCssValue *
+_gtk_css_engine_value_parse (GtkCssParser *parser)
+{
+  GtkThemingEngine *engine;
+  char *str;
+
+  g_return_val_if_fail (parser != NULL, NULL);
+
+  if (_gtk_css_parser_try (parser, "none", TRUE))
+    return _gtk_css_engine_value_new (gtk_theming_engine_load (NULL));
+
+  str = _gtk_css_parser_try_ident (parser, TRUE);
+  if (str == NULL)
+    {
+      _gtk_css_parser_error (parser, "Expected a valid theme name");
+      return NULL;
+    }
+
+  engine = gtk_theming_engine_load (str);
+
+  if (engine == NULL)
+    {
+      _gtk_css_parser_error (parser, "Theming engine '%s' not found", str);
+      g_free (str);
+      return NULL;
+    }
+
+  g_free (str);
+
+  return _gtk_css_engine_value_new (engine);
+}
+
+GtkThemingEngine *
+_gtk_css_engine_value_get_engine (const GtkCssValue *value)
+{
+  g_return_val_if_fail (value->class == &GTK_CSS_VALUE_ENGINE, NULL);
+
+  return value->engine;
+}
+