gtk2/gtk/gtkstylecontext.c

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/* 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 <gdk/gdk.h>
#include "gtkstylecontext.h"
#include "gtktypebuiltins.h"
#include "gtkthemingengine.h"
#include "gtkintl.h"
#include "gtkalias.h"
typedef struct GtkStyleContextPrivate GtkStyleContextPrivate;
typedef struct GtkStyleProviderData GtkStyleProviderData;
typedef struct GtkChildClass GtkChildClass;
struct GtkChildClass
{
GQuark class_quark;
GtkChildClassFlags flags;
};
struct GtkStyleProviderData
{
GtkStyleProvider *provider;
guint priority;
};
struct GtkStyleContextPrivate
{
GList *providers;
GtkStyleSet *store;
GtkWidgetPath *widget_path;
GtkStateFlags state_flags;
GList *style_classes;
GList *child_style_classes;
GtkThemingEngine *theming_engine;
};
#define GTK_STYLE_CONTEXT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_STYLE_CONTEXT, GtkStyleContextPrivate))
static void gtk_style_context_finalize (GObject *object);
G_DEFINE_TYPE (GtkStyleContext, gtk_style_context, G_TYPE_OBJECT)
static void
gtk_style_context_class_init (GtkStyleContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_style_context_finalize;
g_type_class_add_private (object_class, sizeof (GtkStyleContextPrivate));
}
static void
gtk_style_context_init (GtkStyleContext *style_context)
{
GtkStyleContextPrivate *priv;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (style_context);
priv->store = gtk_style_set_new ();
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priv->theming_engine = (GtkThemingEngine *) gtk_theming_engine_load (NULL);
}
static GtkStyleProviderData *
style_provider_data_new (GtkStyleProvider *provider,
guint priority)
{
GtkStyleProviderData *data;
data = g_slice_new (GtkStyleProviderData);
data->provider = g_object_ref (provider);
data->priority = priority;
return data;
}
static void
style_provider_data_free (GtkStyleProviderData *data)
{
g_object_unref (data->provider);
g_slice_free (GtkStyleProviderData, data);
}
static void
gtk_style_context_finalize (GObject *object)
{
GtkStyleContextPrivate *priv;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (object);
g_list_foreach (priv->providers, (GFunc) style_provider_data_free, NULL);
g_list_free (priv->providers);
G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object);
}
static void
rebuild_properties (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GList *list;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
list = priv->providers;
gtk_style_set_clear (priv->store);
while (list)
{
GtkStyleProviderData *data;
GtkStyleSet *provider_style;
data = list->data;
list = list->next;
provider_style = gtk_style_provider_get_style (data->provider,
priv->widget_path);
if (provider_style)
{
gtk_style_set_merge (priv->store, provider_style, TRUE);
g_object_unref (provider_style);
}
}
}
void
gtk_style_context_add_provider (GtkStyleContext *context,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleContextPrivate *priv;
GtkStyleProviderData *new_data;
gboolean added = FALSE;
GList *list;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
new_data = style_provider_data_new (provider, priority);
list = priv->providers;
while (list)
{
GtkStyleProviderData *data;
data = list->data;
/* Provider was already attached to the style
* context, remove in order to add the new data
*/
if (data->provider == provider)
{
GList *link;
link = list;
list = list->next;
/* Remove and free link */
priv->providers = g_list_remove_link (priv->providers, link);
style_provider_data_free (link->data);
g_list_free_1 (link);
continue;
}
if (!added &&
data->priority > priority)
{
priv->providers = g_list_insert_before (priv->providers, list, new_data);
added = TRUE;
}
list = list->next;
}
if (!added)
priv->providers = g_list_append (priv->providers, new_data);
if (priv->widget_path)
rebuild_properties (context);
}
void
gtk_style_context_remove_provider (GtkStyleContext *context,
GtkStyleProvider *provider)
{
GtkStyleContextPrivate *priv;
gboolean removed = FALSE;
GList *list;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
list = priv->providers;
while (list)
{
GtkStyleProviderData *data;
data = list->data;
if (data->provider == provider)
{
priv->providers = g_list_remove_link (priv->providers, list);
style_provider_data_free (list->data);
g_list_free_1 (list);
removed = TRUE;
break;
}
list = list->next;
}
if (removed && priv->widget_path)
rebuild_properties (context);
}
void
gtk_style_context_get_property (GtkStyleContext *context,
const gchar *property,
GtkStateType state,
GValue *value)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (property != NULL);
g_return_if_fail (state < GTK_STATE_LAST);
g_return_if_fail (value != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
gtk_style_set_get_property (priv->store, property, state, value);
}
void
gtk_style_context_get_valist (GtkStyleContext *context,
GtkStateType state,
va_list args)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (state < GTK_STATE_LAST);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
gtk_style_set_get_valist (priv->store, state, args);
}
void
gtk_style_context_get (GtkStyleContext *context,
GtkStateType state,
...)
{
GtkStyleContextPrivate *priv;
va_list args;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (state < GTK_STATE_LAST);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
va_start (args, state);
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gtk_style_set_get_valist (priv->store, state, args);
va_end (args);
}
void
gtk_style_context_set_state (GtkStyleContext *context,
GtkStateFlags flags)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
priv->state_flags = flags;
}
GtkStateFlags
gtk_style_context_get_state (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
return priv->state_flags;
}
gboolean
gtk_style_context_is_state_set (GtkStyleContext *context,
GtkStateType state)
{
GtkStyleContextPrivate *priv;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
switch (state)
{
case GTK_STATE_NORMAL:
return priv->state_flags == 0;
case GTK_STATE_ACTIVE:
return priv->state_flags & GTK_STATE_FLAG_ACTIVE;
case GTK_STATE_PRELIGHT:
return priv->state_flags & GTK_STATE_FLAG_PRELIGHT;
case GTK_STATE_SELECTED:
return priv->state_flags & GTK_STATE_FLAG_SELECTED;
case GTK_STATE_INSENSITIVE:
return priv->state_flags & GTK_STATE_FLAG_INSENSITIVE;
case GTK_STATE_INCONSISTENT:
return priv->state_flags & GTK_STATE_FLAG_INCONSISTENT;
case GTK_STATE_FOCUSED:
return priv->state_flags & GTK_STATE_FLAG_FOCUSED;
default:
return FALSE;
}
}
void
gtk_style_context_set_path (GtkStyleContext *context,
GtkWidgetPath *path)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (path != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
if (priv->widget_path)
{
gtk_widget_path_free (priv->widget_path);
priv->widget_path = NULL;
}
if (path)
{
priv->widget_path = gtk_widget_path_copy (path);
rebuild_properties (context);
}
}
G_CONST_RETURN GtkWidgetPath *
gtk_style_context_get_path (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
return priv->widget_path;
}
void
gtk_style_context_set_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GQuark class_quark;
GList *link;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
class_quark = g_quark_from_string (class_name);
link = priv->style_classes;
while (link)
{
GQuark link_quark;
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link_quark = GPOINTER_TO_UINT (link->data);
if (link_quark == class_quark)
return;
else if (link_quark > class_quark)
{
priv->style_classes = g_list_insert_before (priv->style_classes,
link, GUINT_TO_POINTER (class_quark));
return;
}
link = link->next;
}
priv->style_classes = g_list_append (priv->style_classes,
GUINT_TO_POINTER (class_quark));
}
void
gtk_style_context_unset_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GQuark class_quark;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
priv->style_classes = g_list_remove (priv->style_classes,
GUINT_TO_POINTER (class_quark));
}
gboolean
gtk_style_context_has_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GQuark class_quark;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (class_name != NULL, FALSE);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return FALSE;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
if (g_list_find (priv->style_classes,
GUINT_TO_POINTER (class_quark)))
return TRUE;
return FALSE;
}
static gint
child_style_class_compare (gconstpointer p1,
gconstpointer p2)
{
const GtkChildClass *c1, *c2;
c1 = p1;
c2 = p2;
return (gint) c1->class_quark - c2->class_quark;
}
GList *
gtk_style_context_list_child_classes (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GList *classes = NULL;
GList *link;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
link = priv->child_style_classes;
while (link)
{
GtkChildClass *link_class;
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const gchar *child_class;
link_class = link->data;
link = link->next;
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child_class = g_quark_to_string (link_class->class_quark);
classes = g_list_prepend (classes, child_class);
}
return classes;
}
void
gtk_style_context_set_child_class (GtkStyleContext *context,
const gchar *class_name,
GtkChildClassFlags flags)
{
GtkStyleContextPrivate *priv;
GtkChildClass *child_class;
GQuark class_quark;
GList *link;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
class_quark = g_quark_from_string (class_name);
link = priv->child_style_classes;
while (link)
{
GtkChildClass *link_class;
link_class = link->data;
if (link_class->class_quark == class_quark)
{
link_class->flags = flags;
return;
}
else if (link_class->class_quark > class_quark)
break;
link = link->next;
}
child_class = g_slice_new0 (GtkChildClass);
child_class->class_quark = class_quark;
child_class->flags = flags;
if (link)
priv->child_style_classes = g_list_insert_before (priv->child_style_classes,
link, child_class);
else
priv->child_style_classes = g_list_append (priv->child_style_classes, child_class);
}
void
gtk_style_context_unset_child_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GtkChildClass child_class;
GQuark class_quark;
GList *link;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
child_class.class_quark = class_quark;
link = g_list_find_custom (priv->child_style_classes,
&child_class, child_style_class_compare);
if (link)
{
priv->child_style_classes = g_list_remove_link (priv->child_style_classes, link);
g_slice_free (GtkChildClass, link->data);
g_list_free1 (link);
}
}
gboolean
gtk_style_context_has_child_class (GtkStyleContext *context,
const gchar *class_name,
GtkChildClassFlags *flags_return)
{
GtkStyleContextPrivate *priv;
GtkChildClass child_class;
GQuark class_quark;
GList *link;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (class_name != NULL, FALSE);
if (flags_return)
*flags_return = 0;
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return FALSE;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
child_class.class_quark = class_quark;
link = g_list_find_custom (priv->child_style_classes,
&child_class, child_style_class_compare);
if (link)
{
if (flags_return)
{
GtkChildClass *found_class;
found_class = link->data;
*flags_return = found_class->flags;
}
return TRUE;
}
return FALSE;
}
/* Paint methods */
void
gtk_render_check (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_check (priv->theming_engine, cr,
x, y, width, height);
}
void
gtk_render_option (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_option (priv->theming_engine, cr,
x, y, width, height);
}
void
gtk_render_arrow (GtkStyleContext *context,
cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_arrow (priv->theming_engine, cr,
angle, x, y, size);
}
void
gtk_render_background (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_background (priv->theming_engine, cr, x, y, width, height);
}
void
gtk_render_frame (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_frame (priv->theming_engine, cr, x, y, width, height);
}
void
gtk_render_expander (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_expander (priv->theming_engine, cr, x, y, width, height);
}
void
gtk_render_focus (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_focus (priv->theming_engine, cr, x, y, width, height);
}
void
gtk_render_layout (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_layout (priv->theming_engine, cr, x, y, layout);
}
void
gtk_render_line (GtkStyleContext *context,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_line (priv->theming_engine, cr, x0, y0, x1, y1);
}
void
gtk_render_slider (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_slider (priv->theming_engine, cr, x, y, width, height, orientation);
}
void
gtk_render_frame_gap (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side,
gdouble xy0_gap,
gdouble xy1_gap)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_frame_gap (priv->theming_engine, cr,
x, y, width, height, gap_side,
xy0_gap, xy1_gap);
}
void
gtk_render_extension (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_extension (priv->theming_engine, cr, x, y, width, height, gap_side);
}
void
gtk_render_handle (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_handle (priv->theming_engine, cr, x, y, width, height, orientation);
}
#define __GTK_STYLE_CONTEXT_C__
#include "gtkaliasdef.c"