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/*
* Copyright © 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 2.1 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkcsscustompropertyprivate.h"
#include <string.h>
#include "gtkthemingengine.h"
G_DEFINE_TYPE (GtkCssCustomProperty, _gtk_css_custom_property, GTK_TYPE_CSS_STYLE_PROPERTY)
static void
_gtk_css_custom_property_class_init (GtkCssCustomPropertyClass *klass)
{
}
static void
_gtk_css_custom_property_init (GtkCssCustomProperty *custom_property)
{
}
static void
gtk_css_custom_property_create_initial_value (GParamSpec *pspec,
GValue *value)
{
g_value_init (value, pspec->value_type);
if (pspec->value_type == GTK_TYPE_THEMING_ENGINE)
g_value_set_object (value, gtk_theming_engine_load (NULL));
else if (pspec->value_type == PANGO_TYPE_FONT_DESCRIPTION)
g_value_take_boxed (value, pango_font_description_from_string ("Sans 10"));
else if (pspec->value_type == GDK_TYPE_RGBA)
{
GdkRGBA color;
gdk_rgba_parse (&color, "pink");
g_value_set_boxed (value, &color);
}
else if (pspec->value_type == GTK_TYPE_BORDER)
{
g_value_take_boxed (value, gtk_border_new ());
}
else
g_param_value_set_default (pspec, value);
}
/* Property registration functions */
/**
* gtk_theming_engine_register_property: (skip)
* @name_space: namespace for the property name
* @parse_func: parsing function to use, or %NULL
* @pspec: the #GParamSpec for the new property
*
* Registers a property so it can be used in the CSS file format,
* on the CSS file the property will look like
* "-${@name_space}-${property_name}". being
* ${property_name} the given to @pspec. @name_space will usually
* be the theme engine name.
*
* For any type a @parse_func may be provided, being this function
* used for turning any property value (between ':' and ';') in
* CSS to the #GValue needed. For basic types there is already
* builtin parsing support, so %NULL may be provided for these
* cases.
*
* <note>
* Engines must ensure property registration happens exactly once,
* usually GTK+ deals with theming engines as singletons, so this
* should be guaranteed to happen once, but bear this in mind
* when creating #GtkThemeEngine<!-- -->s yourself.
* </note>
*
* <note>
* In order to make use of the custom registered properties in
* the CSS file, make sure the engine is loaded first by specifying
* the engine property, either in a previous rule or within the same
* one.
* <programlisting>
* * {
* engine: someengine;
* -SomeEngine-custom-property: 2;
* }
* </programlisting>
* </note>
*
* Since: 3.0
**/
void
gtk_theming_engine_register_property (const gchar *name_space,
GtkStylePropertyParser parse_func,
GParamSpec *pspec)
{
GtkStyleProperty *node;
GValue initial = { 0, };
gchar *name;
g_return_if_fail (name_space != NULL);
g_return_if_fail (strchr (name_space, ' ') == NULL);
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
name = g_strdup_printf ("-%s-%s", name_space, pspec->name);
gtk_css_custom_property_create_initial_value (pspec, &initial);
node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
"initial-value", &initial,
"name", name,
"value-type", pspec->value_type,
NULL);
node->pspec = pspec;
node->property_parse_func = parse_func;
g_value_unset (&initial);
g_free (name);
}
/**
* gtk_style_properties_register_property: (skip)
* @parse_func: parsing function to use, or %NULL
* @pspec: the #GParamSpec for the new property
*
* Registers a property so it can be used in the CSS file format.
* This function is the low-level equivalent of
* gtk_theming_engine_register_property(), if you are implementing
* a theming engine, you want to use that function instead.
*
* Since: 3.0
**/
void
gtk_style_properties_register_property (GtkStylePropertyParser parse_func,
GParamSpec *pspec)
{
GtkStyleProperty *node;
GValue initial = { 0, };
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
gtk_css_custom_property_create_initial_value (pspec, &initial);
node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
"initial-value", &initial,
"name", pspec->name,
"value-type", pspec->value_type,
NULL);
node->pspec = pspec;
node->property_parse_func = parse_func;
g_value_unset (&initial);
}
/**
* gtk_style_properties_lookup_property: (skip)
* @property_name: property name to look up
* @parse_func: (out): return location for the parse function
* @pspec: (out) (transfer none): return location for the #GParamSpec
*
* Returns %TRUE if a property has been registered, if @pspec or
* @parse_func are not %NULL, the #GParamSpec and parsing function
* will be respectively returned.
*
* Returns: %TRUE if the property is registered, %FALSE otherwise
*
* Since: 3.0
**/
gboolean
gtk_style_properties_lookup_property (const gchar *property_name,
GtkStylePropertyParser *parse_func,
GParamSpec **pspec)
{
GtkStyleProperty *node;
gboolean found = FALSE;
g_return_val_if_fail (property_name != NULL, FALSE);
node = _gtk_style_property_lookup (property_name);
if (GTK_IS_CSS_CUSTOM_PROPERTY (node))
{
if (pspec)
*pspec = node->pspec;
if (parse_func)
*parse_func = node->property_parse_func;
found = TRUE;
}
return found;
}
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