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[gtk+/wip/cssvalue: 1/3] css: Add GtkCssValue, an immutable refcounted css value

commit 0ece7a5de3eae5f4d7e4d1623d191a0a0628e652
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Mar 6 14:16:08 2012 +0100

    css: Add GtkCssValue, an immutable refcounted css value

 gtk/Makefile.am          |    2 +
 gtk/gtkcssvalue.c        |  467 ++++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkcssvalueprivate.h |   96 ++++++++++
 3 files changed, 565 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 99ac63d..41e42d5 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -438,6 +438,7 @@ gtk_private_h_sources =		\
 	gtkcssshorthandpropertyprivate.h \
 	gtkcssstylefuncsprivate.h \
 	gtkcssstylepropertyprivate.h \
+	gtkcssvalueprivate.h	\
 	gtkcustompaperunixdialog.h \
 	gtkentryprivate.h	\
 	gtkfilechooserdefault.h	\
@@ -634,6 +635,7 @@ gtk_base_c_sources = 		\
 	gtkcssstylefuncs.c	\
 	gtkcssstyleproperty.c	\
 	gtkcssstylepropertyimpl.c \
+	gtkcssvalue.c		\
 	gtkcsstypes.c		\
 	gtkdialog.c		\
 	gtkdrawingarea.c	\
diff --git a/gtk/gtkcssvalue.c b/gtk/gtkcssvalue.c
new file mode 100644
index 0000000..1522974
--- /dev/null
+++ b/gtk/gtkcssvalue.c
@@ -0,0 +1,467 @@
+/* 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 "gtkcssvalueprivate.h"
+#include "gtktypebuiltins.h"
+#include "gtkgradient.h"
+#include <cairo-gobject.h>
+#include "gtkprivatetypebuiltins.h"
+
+struct _GtkCssValue
+{
+  volatile gint ref_count;
+  GValue g_value;
+};
+
+G_DEFINE_BOXED_TYPE (GtkCssValue, _gtk_css_value, _gtk_css_value_ref, _gtk_css_value_unref)
+
+static GtkCssValue *
+_gtk_css_value_new (void)
+{
+  GtkCssValue *value;
+
+  value = g_slice_new0 (GtkCssValue);
+
+  value->ref_count = 1;
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_gvalue (const GValue *g_value)
+{
+  GtkCssValue *value;
+
+  g_return_val_if_fail (g_value != NULL, NULL);
+
+  value = _gtk_css_value_new ();
+
+  g_value_init (&value->g_value, G_VALUE_TYPE (g_value));
+  g_value_copy (g_value, &value->g_value);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_gvalue (GValue *g_value)
+{
+  GtkCssValue *value;
+
+  g_return_val_if_fail (g_value != NULL, NULL);
+
+  value = _gtk_css_value_new ();
+  value->g_value = *g_value;
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_int (gint val)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, G_TYPE_INT);
+  g_value_set_int (&value->g_value, val);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_string (char *string)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, G_TYPE_STRING);
+  g_value_take_string (&value->g_value, string);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_string (const char *string)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, G_TYPE_STRING);
+  g_value_set_string (&value->g_value, string);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_border (const GtkBorder *border)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GTK_TYPE_BORDER);
+  g_value_set_boxed (&value->g_value, border);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_pattern (cairo_pattern_t *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, CAIRO_GOBJECT_TYPE_PATTERN);
+  g_value_take_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_pattern (const cairo_pattern_t *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, CAIRO_GOBJECT_TYPE_PATTERN);
+  g_value_set_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_shadow (GtkShadow *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GTK_TYPE_SHADOW);
+  g_value_take_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_font_description (PangoFontDescription *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, PANGO_TYPE_FONT_DESCRIPTION);
+  g_value_take_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_image (GtkCssImage *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GTK_TYPE_CSS_IMAGE);
+  g_value_take_object (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_number (const GtkCssNumber *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GTK_TYPE_CSS_NUMBER);
+  g_value_set_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_rgba (const GdkRGBA *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GDK_TYPE_RGBA);
+  g_value_set_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_color (const GdkColor *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GDK_TYPE_COLOR);
+  g_value_set_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_from_background_size (const GtkCssBackgroundSize *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GTK_TYPE_CSS_BACKGROUND_SIZE);
+  g_value_set_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_new_take_symbolic_color (GtkSymbolicColor *v)
+{
+  GtkCssValue *value;
+
+  value = _gtk_css_value_new ();
+  g_value_init (&value->g_value, GTK_TYPE_SYMBOLIC_COLOR);
+  g_value_take_boxed (&value->g_value, v);
+
+  return value;
+}
+
+GtkCssValue *
+_gtk_css_value_ref (GtkCssValue *value)
+{
+  g_return_val_if_fail (value != NULL, NULL);
+
+  g_atomic_int_add (&value->ref_count, 1);
+
+  return value;
+}
+
+void
+_gtk_css_value_unref (GtkCssValue *value)
+{
+  if (value == NULL)
+    return;
+
+  if (!g_atomic_int_dec_and_test (&value->ref_count))
+    return;
+
+  g_value_unset (&value->g_value);
+  g_slice_free (GtkCssValue, value);
+}
+
+GType
+_gtk_css_value_get_content_type (GtkCssValue *value)
+{
+  return G_VALUE_TYPE (&value->g_value);
+}
+
+gboolean
+_gtk_css_value_holds (GtkCssValue *value, GType type)
+{
+  return G_VALUE_HOLDS (&value->g_value, type);
+}
+
+void
+_gtk_css_value_init_gvalue (GtkCssValue *value,
+			    GValue      *g_value)
+{
+  if (value != NULL)
+    {
+      g_value_init (g_value, G_VALUE_TYPE (&value->g_value));
+      g_value_copy (&value->g_value, g_value);
+    }
+}
+
+void
+_gtk_css_value_to_gvalue (GtkCssValue *value,
+			  GValue      *g_value)
+{
+  if (G_VALUE_TYPE (&value->g_value) == G_VALUE_TYPE (g_value))
+    g_value_copy (&value->g_value, g_value);
+  else if (g_value_type_transformable (G_VALUE_TYPE (&value->g_value), G_VALUE_TYPE (g_value)))
+    g_value_transform (&value->g_value, g_value);
+  else
+    g_warning ("can't convert css value of type `%s' as value of type `%s'",
+	       G_VALUE_TYPE_NAME (&value->g_value),
+	       G_VALUE_TYPE_NAME (g_value));
+}
+
+gboolean
+_gtk_css_value_is_special  (GtkCssValue *value)
+{
+  return _gtk_css_value_holds (value, GTK_TYPE_CSS_SPECIAL_VALUE);
+}
+
+GtkCssSpecialValue
+_gtk_css_value_get_special_kind  (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_CSS_SPECIAL_VALUE), 0);
+  return g_value_get_enum (&value->g_value);
+}
+
+GtkCssNumber *
+_gtk_css_value_get_number  (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_CSS_NUMBER), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+GtkSymbolicColor *
+_gtk_css_value_get_symbolic_color  (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_SYMBOLIC_COLOR), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+int
+_gtk_css_value_get_int (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_INT), 0);
+  return g_value_get_int (&value->g_value);
+}
+
+double
+_gtk_css_value_get_double (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_DOUBLE), 0);
+  return g_value_get_double (&value->g_value);
+}
+
+const char *
+_gtk_css_value_get_string (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_STRING), 0);
+  return g_value_get_string (&value->g_value);
+}
+
+gpointer
+_gtk_css_value_dup_object (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_OBJECT), NULL);
+  return g_value_dup_object (&value->g_value);
+}
+
+gpointer
+_gtk_css_value_get_object (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_OBJECT), NULL);
+  return g_value_get_object (&value->g_value);
+}
+
+gpointer
+_gtk_css_value_get_boxed (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_BOXED), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+const char **
+_gtk_css_value_get_strv (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, G_TYPE_STRV), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+GtkCssImage *
+_gtk_css_value_get_image (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_CSS_IMAGE), NULL);
+  return g_value_get_object (&value->g_value);
+}
+
+GtkBorderStyle
+_gtk_css_value_get_border_style (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_BORDER_STYLE), 0);
+  return g_value_get_enum (&value->g_value);
+}
+
+GtkCssBackgroundSize *
+_gtk_css_value_get_background_size (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_CSS_BACKGROUND_SIZE), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+GtkCssBorderImageRepeat *
+_gtk_css_value_get_border_image_repeat (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_CSS_BORDER_IMAGE_REPEAT), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+GtkCssBorderCornerRadius *
+_gtk_css_value_get_border_corner_radius (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_CSS_BORDER_CORNER_RADIUS), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+PangoFontDescription *
+_gtk_css_value_get_font_description (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, PANGO_TYPE_FONT_DESCRIPTION), 0);
+  return g_value_get_boxed (&value->g_value);
+}
+
+PangoStyle
+_gtk_css_value_get_pango_style (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, PANGO_TYPE_STYLE), 0);
+  return g_value_get_enum (&value->g_value);
+}
+
+PangoVariant
+_gtk_css_value_get_pango_variant (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, PANGO_TYPE_VARIANT), 0);
+  return g_value_get_enum (&value->g_value);
+}
+
+PangoWeight
+_gtk_css_value_get_pango_weight (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, PANGO_TYPE_WEIGHT), 0);
+  return g_value_get_enum (&value->g_value);
+}
+
+GdkRGBA *
+_gtk_css_value_get_rgba (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GDK_TYPE_RGBA), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+cairo_pattern_t *
+_gtk_css_value_get_pattern (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, CAIRO_GOBJECT_TYPE_PATTERN), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+GtkGradient *
+_gtk_css_value_get_gradient (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_GRADIENT), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
+
+GtkShadow *
+_gtk_css_value_get_shadow (GtkCssValue *value)
+{
+  g_return_val_if_fail (_gtk_css_value_holds (value, GTK_TYPE_SHADOW), NULL);
+  return g_value_get_boxed (&value->g_value);
+}
diff --git a/gtk/gtkcssvalueprivate.h b/gtk/gtkcssvalueprivate.h
new file mode 100644
index 0000000..62f17a3
--- /dev/null
+++ b/gtk/gtkcssvalueprivate.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright  2012 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 2.1 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/>.
+ *
+ * Authors: Alexander Larsson <alexl gnome org>
+ */
+
+#ifndef __GTK_CSS_VALUE_PRIVATE_H__
+#define __GTK_CSS_VALUE_PRIVATE_H__
+
+#include <glib-object.h>
+#include "gtkcsstypesprivate.h"
+#include "gtksymboliccolor.h"
+#include "gtkcssimageprivate.h"
+#include "gtkshadowprivate.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_VALUE           (_gtk_css_value_get_type ())
+#define GTK_CSS_VALUE(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_VALUE, GtkCssValue))
+#define GTK_CSS_VALUE_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_VALUE, GtkCssValueClass))
+#define GTK_IS_CSS_VALUE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_VALUE))
+#define GTK_IS_CSS_VALUE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_VALUE))
+#define GTK_CSS_VALUE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_VALUE, GtkCssValueClass))
+
+typedef struct _GtkCssValue           GtkCssValue;
+
+/* A GtkCssValue is a refcounted immutable value type */
+
+GType        _gtk_css_value_get_type                  (void) G_GNUC_CONST;
+GtkCssValue *_gtk_css_value_ref                       (GtkCssValue                *value);
+void         _gtk_css_value_unref                     (GtkCssValue                *value);
+GType        _gtk_css_value_get_content_type          (GtkCssValue                *value);
+gboolean     _gtk_css_value_holds                     (GtkCssValue                *value,
+						       GType                       type);
+GtkCssValue *_gtk_css_value_new_from_gvalue           (const GValue               *g_value);
+GtkCssValue *_gtk_css_value_new_take_gvalue           (GValue                     *g_value);
+GtkCssValue *_gtk_css_value_new_from_int              (gint                        val);
+GtkCssValue *_gtk_css_value_new_from_string           (const char                 *string);
+GtkCssValue *_gtk_css_value_new_take_string           (char                       *string);
+GtkCssValue *_gtk_css_value_new_take_font_description (PangoFontDescription       *v);
+GtkCssValue *_gtk_css_value_new_from_rgba             (const GdkRGBA              *v);
+GtkCssValue *_gtk_css_value_new_from_color            (const GdkColor             *v);
+GtkCssValue *_gtk_css_value_new_take_symbolic_color   (GtkSymbolicColor           *v);
+GtkCssValue *_gtk_css_value_new_from_border           (const GtkBorder            *border);
+GtkCssValue *_gtk_css_value_new_take_pattern          (cairo_pattern_t            *v);
+GtkCssValue *_gtk_css_value_new_from_pattern          (const cairo_pattern_t      *v);
+GtkCssValue *_gtk_css_value_new_take_shadow           (GtkShadow                  *v);
+GtkCssValue *_gtk_css_value_new_take_image            (GtkCssImage                *v);
+GtkCssValue *_gtk_css_value_new_from_number           (const GtkCssNumber         *v);
+GtkCssValue *_gtk_css_value_new_from_background_size  (const GtkCssBackgroundSize *v);
+void         _gtk_css_value_to_gvalue                 (GtkCssValue                *value,
+						       GValue                     *g_value);
+void         _gtk_css_value_init_gvalue               (GtkCssValue                *value,
+						       GValue                     *g_value);
+
+gboolean                  _gtk_css_value_is_special                 (GtkCssValue *value);
+GtkCssSpecialValue        _gtk_css_value_get_special_kind           (GtkCssValue *value);
+int                       _gtk_css_value_get_int                    (GtkCssValue *value);
+double                    _gtk_css_value_get_double                 (GtkCssValue *value);
+const char *              _gtk_css_value_get_string                 (GtkCssValue *value);
+gpointer                  _gtk_css_value_dup_object                 (GtkCssValue *value);
+gpointer                  _gtk_css_value_get_object                 (GtkCssValue *value);
+gpointer                  _gtk_css_value_get_boxed                  (GtkCssValue *value);
+const char **             _gtk_css_value_get_strv                   (GtkCssValue *value);
+GtkCssNumber             *_gtk_css_value_get_number                 (GtkCssValue *value);
+GtkSymbolicColor         *_gtk_css_value_get_symbolic_color         (GtkCssValue *value);
+GtkCssImage              *_gtk_css_value_get_image                  (GtkCssValue *value);
+GtkBorderStyle            _gtk_css_value_get_border_style           (GtkCssValue *value);
+GtkCssBackgroundSize     *_gtk_css_value_get_background_size        (GtkCssValue *value);
+GtkCssBorderCornerRadius *_gtk_css_value_get_border_corner_radius   (GtkCssValue *value);
+GtkCssBorderImageRepeat  *_gtk_css_value_get_border_image_repeat    (GtkCssValue *value);
+PangoFontDescription *    _gtk_css_value_get_font_description       (GtkCssValue *value);
+PangoStyle                _gtk_css_value_get_pango_style            (GtkCssValue *value);
+PangoVariant              _gtk_css_value_get_pango_variant          (GtkCssValue *value);
+PangoWeight               _gtk_css_value_get_pango_weight           (GtkCssValue *value);
+GdkRGBA                  *_gtk_css_value_get_rgba                   (GtkCssValue *value);
+cairo_pattern_t          *_gtk_css_value_get_pattern                (GtkCssValue *value);
+GtkGradient              *_gtk_css_value_get_gradient               (GtkCssValue *value);
+GtkShadow                *_gtk_css_value_get_shadow                 (GtkCssValue *value);
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_VALUE_PRIVATE_H__ */
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