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 "gtkstylepropertiesprivate.h"
28 #include "gtkthemingengine.h"
30 G_DEFINE_TYPE (GtkCssCustomProperty, _gtk_css_custom_property, GTK_TYPE_CSS_STYLE_PROPERTY)
33 gtk_css_custom_property_get_specified_type (GParamSpec *pspec)
35 if (pspec->value_type == GDK_TYPE_RGBA ||
36 pspec->value_type == GDK_TYPE_COLOR)
37 return GTK_TYPE_SYMBOLIC_COLOR;
39 return pspec->value_type;
43 gtk_css_custom_property_parse_value (GtkStyleProperty *property,
47 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
48 GValue value = G_VALUE_INIT;
52 if (custom->property_parse_func)
57 g_value_init (&value, _gtk_style_property_get_value_type (property));
59 value_str = _gtk_css_parser_read_value (parser);
60 if (value_str != NULL)
62 success = (* custom->property_parse_func) (value_str, &value, &error);
70 g_value_init (&value, gtk_css_custom_property_get_specified_type (custom->pspec));
72 success = _gtk_css_style_parse_value (&value, parser, base);
77 g_value_unset (&value);
81 result = _gtk_css_value_new_from_gvalue (&value);
82 g_value_unset (&value);
88 gtk_css_custom_property_query (GtkStyleProperty *property,
90 GtkStyleQueryFunc query_func,
93 GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (property);
94 GtkCssValue *css_value;
96 css_value = (* query_func) (_gtk_css_style_property_get_id (style), query_data);
97 if (css_value == NULL)
98 css_value =_gtk_css_style_property_get_initial_value (style);
100 _gtk_css_value_init_gvalue (css_value, value);
101 g_assert (GTK_CSS_CUSTOM_PROPERTY (property)->pspec->value_type == G_VALUE_TYPE (value));
105 gtk_css_custom_property_assign (GtkStyleProperty *property,
106 GtkStyleProperties *props,
110 GtkCssValue *css_value = _gtk_css_value_new_from_gvalue (value);
111 _gtk_style_properties_set_property_by_property (props,
112 GTK_CSS_STYLE_PROPERTY (property),
115 _gtk_css_value_unref (css_value);
119 _gtk_css_custom_property_class_init (GtkCssCustomPropertyClass *klass)
121 GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
123 property_class->parse_value = gtk_css_custom_property_parse_value;
124 property_class->query = gtk_css_custom_property_query;
125 property_class->assign = gtk_css_custom_property_assign;
129 gtk_css_custom_property_compute_value (GtkCssStyleProperty *property,
130 GtkStyleContext *context,
131 GtkCssValue *specified)
133 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
135 return _gtk_css_style_compute_value (context, custom->pspec->value_type, specified);
139 _gtk_css_custom_property_init (GtkCssCustomProperty *custom)
141 GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (custom);
143 style->compute_value = gtk_css_custom_property_compute_value;
147 gtk_css_custom_property_create_initial_value (GParamSpec *pspec)
149 GValue value = G_VALUE_INIT;
152 g_value_init (&value, pspec->value_type);
154 if (pspec->value_type == GTK_TYPE_THEMING_ENGINE)
155 g_value_set_object (&value, gtk_theming_engine_load (NULL));
156 else if (pspec->value_type == PANGO_TYPE_FONT_DESCRIPTION)
157 g_value_take_boxed (&value, pango_font_description_from_string ("Sans 10"));
158 else if (pspec->value_type == GDK_TYPE_RGBA)
161 gdk_rgba_parse (&color, "pink");
162 g_value_set_boxed (&value, &color);
164 else if (pspec->value_type == GDK_TYPE_COLOR)
167 gdk_color_parse ("pink", &color);
168 g_value_set_boxed (&value, &color);
170 else if (pspec->value_type == GTK_TYPE_BORDER)
172 g_value_take_boxed (&value, gtk_border_new ());
175 g_param_value_set_default (pspec, &value);
177 result = _gtk_css_value_new_from_gvalue (&value);
178 g_value_unset (&value);
183 /* Property registration functions */
186 * gtk_theming_engine_register_property: (skip)
187 * @name_space: namespace for the property name
188 * @parse_func: parsing function to use, or %NULL
189 * @pspec: the #GParamSpec for the new property
191 * Registers a property so it can be used in the CSS file format,
192 * on the CSS file the property will look like
193 * "-${@name_space}-${property_name}". being
194 * ${property_name} the given to @pspec. @name_space will usually
195 * be the theme engine name.
197 * For any type a @parse_func may be provided, being this function
198 * used for turning any property value (between ':' and ';') in
199 * CSS to the #GValue needed. For basic types there is already
200 * builtin parsing support, so %NULL may be provided for these
204 * Engines must ensure property registration happens exactly once,
205 * usually GTK+ deals with theming engines as singletons, so this
206 * should be guaranteed to happen once, but bear this in mind
207 * when creating #GtkThemeEngine<!-- -->s yourself.
211 * In order to make use of the custom registered properties in
212 * the CSS file, make sure the engine is loaded first by specifying
213 * the engine property, either in a previous rule or within the same
217 * engine: someengine;
218 * -SomeEngine-custom-property: 2;
226 gtk_theming_engine_register_property (const gchar *name_space,
227 GtkStylePropertyParser parse_func,
230 GtkCssCustomProperty *node;
231 GtkCssValue *initial;
234 g_return_if_fail (name_space != NULL);
235 g_return_if_fail (strchr (name_space, ' ') == NULL);
236 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
238 name = g_strdup_printf ("-%s-%s", name_space, pspec->name);
240 /* This also initializes the default properties */
241 if (_gtk_style_property_lookup (pspec->name))
243 g_warning ("a property with name '%s' already exists", name);
248 initial = gtk_css_custom_property_create_initial_value (pspec);
250 node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
251 "initial-value", initial,
253 "value-type", pspec->value_type,
256 node->property_parse_func = parse_func;
258 _gtk_css_value_unref (initial);
263 * gtk_style_properties_register_property: (skip)
264 * @parse_func: parsing function to use, or %NULL
265 * @pspec: the #GParamSpec for the new property
267 * Registers a property so it can be used in the CSS file format.
268 * This function is the low-level equivalent of
269 * gtk_theming_engine_register_property(), if you are implementing
270 * a theming engine, you want to use that function instead.
275 gtk_style_properties_register_property (GtkStylePropertyParser parse_func,
278 GtkCssCustomProperty *node;
279 GtkCssValue *initial;
281 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
283 /* This also initializes the default properties */
284 if (_gtk_style_property_lookup (pspec->name))
286 g_warning ("a property with name '%s' already exists", pspec->name);
290 initial = gtk_css_custom_property_create_initial_value (pspec);
292 node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
293 "initial-value", initial,
295 "value-type", pspec->value_type,
298 node->property_parse_func = parse_func;
300 _gtk_css_value_unref (initial);
304 * gtk_style_properties_lookup_property: (skip)
305 * @property_name: property name to look up
306 * @parse_func: (out): return location for the parse function
307 * @pspec: (out) (transfer none): return location for the #GParamSpec
309 * Returns %TRUE if a property has been registered, if @pspec or
310 * @parse_func are not %NULL, the #GParamSpec and parsing function
311 * will be respectively returned.
313 * Returns: %TRUE if the property is registered, %FALSE otherwise
318 gtk_style_properties_lookup_property (const gchar *property_name,
319 GtkStylePropertyParser *parse_func,
322 GtkStyleProperty *node;
323 gboolean found = FALSE;
325 g_return_val_if_fail (property_name != NULL, FALSE);
327 node = _gtk_style_property_lookup (property_name);
329 if (GTK_IS_CSS_CUSTOM_PROPERTY (node))
331 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (node);
334 *pspec = custom->pspec;
337 *parse_func = custom->property_parse_func;