2 * Copyright © 2011 Red Hat Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
17 * Authors: Benjamin Otte <otte@gnome.org>
22 #include "gtkcsscustompropertyprivate.h"
26 #include "gtkcssstylefuncsprivate.h"
27 #include "gtkcsstypedvalueprivate.h"
28 #include "gtkstylepropertiesprivate.h"
29 #include "gtkthemingengine.h"
31 G_DEFINE_TYPE (GtkCssCustomProperty, _gtk_css_custom_property, GTK_TYPE_CSS_STYLE_PROPERTY)
34 gtk_css_custom_property_get_specified_type (GParamSpec *pspec)
36 if (pspec->value_type == GDK_TYPE_RGBA ||
37 pspec->value_type == GDK_TYPE_COLOR)
38 return GTK_TYPE_SYMBOLIC_COLOR;
40 return pspec->value_type;
44 gtk_css_custom_property_parse_value (GtkStyleProperty *property,
47 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
48 GValue value = G_VALUE_INIT;
51 if (custom->property_parse_func)
56 g_value_init (&value, _gtk_style_property_get_value_type (property));
58 value_str = _gtk_css_parser_read_value (parser);
59 if (value_str != NULL)
61 success = (* custom->property_parse_func) (value_str, &value, &error);
69 g_value_init (&value, gtk_css_custom_property_get_specified_type (custom->pspec));
71 success = _gtk_css_style_parse_value (&value, parser);
76 g_value_unset (&value);
80 return _gtk_css_typed_value_new_take (&value);
84 gtk_css_custom_property_query (GtkStyleProperty *property,
86 GtkStyleQueryFunc query_func,
89 GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (property);
90 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
91 GtkCssValue *css_value;
93 css_value = (* query_func) (_gtk_css_style_property_get_id (style), query_data);
94 if (css_value == NULL)
95 css_value = _gtk_css_style_property_get_initial_value (style);
97 g_value_init (value, custom->pspec->value_type);
98 g_value_copy (_gtk_css_typed_value_get (css_value), value);
102 gtk_css_custom_property_assign (GtkStyleProperty *property,
103 GtkStyleProperties *props,
107 GtkCssValue *css_value = _gtk_css_typed_value_new (value);
108 _gtk_style_properties_set_property_by_property (props,
109 GTK_CSS_STYLE_PROPERTY (property),
112 _gtk_css_value_unref (css_value);
116 _gtk_css_custom_property_class_init (GtkCssCustomPropertyClass *klass)
118 GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
120 property_class->parse_value = gtk_css_custom_property_parse_value;
121 property_class->query = gtk_css_custom_property_query;
122 property_class->assign = gtk_css_custom_property_assign;
126 gtk_css_custom_property_compute_value (GtkCssStyleProperty *property,
127 GtkStyleContext *context,
128 GtkCssValue *specified)
130 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
132 return _gtk_css_style_compute_value (context, custom->pspec->value_type, specified);
136 _gtk_css_custom_property_init (GtkCssCustomProperty *custom)
138 GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (custom);
140 style->compute_value = gtk_css_custom_property_compute_value;
144 gtk_css_custom_property_create_initial_value (GParamSpec *pspec)
146 GValue value = G_VALUE_INIT;
149 g_value_init (&value, pspec->value_type);
151 if (pspec->value_type == GTK_TYPE_THEMING_ENGINE)
152 g_value_set_object (&value, gtk_theming_engine_load (NULL));
153 else if (pspec->value_type == PANGO_TYPE_FONT_DESCRIPTION)
154 g_value_take_boxed (&value, pango_font_description_from_string ("Sans 10"));
155 else if (pspec->value_type == GDK_TYPE_RGBA)
158 gdk_rgba_parse (&color, "pink");
159 g_value_set_boxed (&value, &color);
161 else if (pspec->value_type == GDK_TYPE_COLOR)
164 gdk_color_parse ("pink", &color);
165 g_value_set_boxed (&value, &color);
167 else if (pspec->value_type == GTK_TYPE_BORDER)
169 g_value_take_boxed (&value, gtk_border_new ());
172 g_param_value_set_default (pspec, &value);
174 result = _gtk_css_typed_value_new (&value);
175 g_value_unset (&value);
180 /* Property registration functions */
183 * gtk_theming_engine_register_property: (skip)
184 * @name_space: namespace for the property name
185 * @parse_func: parsing function to use, or %NULL
186 * @pspec: the #GParamSpec for the new property
188 * Registers a property so it can be used in the CSS file format,
189 * on the CSS file the property will look like
190 * "-${@name_space}-${property_name}". being
191 * ${property_name} the given to @pspec. @name_space will usually
192 * be the theme engine name.
194 * For any type a @parse_func may be provided, being this function
195 * used for turning any property value (between ':' and ';') in
196 * CSS to the #GValue needed. For basic types there is already
197 * builtin parsing support, so %NULL may be provided for these
201 * Engines must ensure property registration happens exactly once,
202 * usually GTK+ deals with theming engines as singletons, so this
203 * should be guaranteed to happen once, but bear this in mind
204 * when creating #GtkThemeEngine<!-- -->s yourself.
208 * In order to make use of the custom registered properties in
209 * the CSS file, make sure the engine is loaded first by specifying
210 * the engine property, either in a previous rule or within the same
214 * engine: someengine;
215 * -SomeEngine-custom-property: 2;
223 gtk_theming_engine_register_property (const gchar *name_space,
224 GtkStylePropertyParser parse_func,
227 GtkCssCustomProperty *node;
228 GtkCssValue *initial;
231 g_return_if_fail (name_space != NULL);
232 g_return_if_fail (strchr (name_space, ' ') == NULL);
233 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
235 name = g_strdup_printf ("-%s-%s", name_space, pspec->name);
237 /* This also initializes the default properties */
238 if (_gtk_style_property_lookup (pspec->name))
240 g_warning ("a property with name '%s' already exists", name);
245 initial = gtk_css_custom_property_create_initial_value (pspec);
247 node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
248 "initial-value", initial,
250 "value-type", pspec->value_type,
253 node->property_parse_func = parse_func;
255 _gtk_css_value_unref (initial);
260 * gtk_style_properties_register_property: (skip)
261 * @parse_func: parsing function to use, or %NULL
262 * @pspec: the #GParamSpec for the new property
264 * Registers a property so it can be used in the CSS file format.
265 * This function is the low-level equivalent of
266 * gtk_theming_engine_register_property(), if you are implementing
267 * a theming engine, you want to use that function instead.
272 gtk_style_properties_register_property (GtkStylePropertyParser parse_func,
275 GtkCssCustomProperty *node;
276 GtkCssValue *initial;
278 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
280 /* This also initializes the default properties */
281 if (_gtk_style_property_lookup (pspec->name))
283 g_warning ("a property with name '%s' already exists", pspec->name);
287 initial = gtk_css_custom_property_create_initial_value (pspec);
289 node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
290 "initial-value", initial,
292 "value-type", pspec->value_type,
295 node->property_parse_func = parse_func;
297 _gtk_css_value_unref (initial);
301 * gtk_style_properties_lookup_property: (skip)
302 * @property_name: property name to look up
303 * @parse_func: (out): return location for the parse function
304 * @pspec: (out) (transfer none): return location for the #GParamSpec
306 * Returns %TRUE if a property has been registered, if @pspec or
307 * @parse_func are not %NULL, the #GParamSpec and parsing function
308 * will be respectively returned.
310 * Returns: %TRUE if the property is registered, %FALSE otherwise
315 gtk_style_properties_lookup_property (const gchar *property_name,
316 GtkStylePropertyParser *parse_func,
319 GtkStyleProperty *node;
320 gboolean found = FALSE;
322 g_return_val_if_fail (property_name != NULL, FALSE);
324 node = _gtk_style_property_lookup (property_name);
326 if (GTK_IS_CSS_CUSTOM_PROPERTY (node))
328 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (node);
331 *pspec = custom->pspec;
334 *parse_func = custom->property_parse_func;