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,
48 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
49 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);
77 g_value_unset (&value);
81 return _gtk_css_typed_value_new_take (&value);
85 gtk_css_custom_property_query (GtkStyleProperty *property,
87 GtkStyleQueryFunc query_func,
90 GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (property);
91 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
92 GtkCssValue *css_value;
94 css_value = (* query_func) (_gtk_css_style_property_get_id (style), query_data);
95 if (css_value == NULL)
96 css_value = _gtk_css_style_property_get_initial_value (style);
98 g_value_init (value, custom->pspec->value_type);
99 g_value_copy (_gtk_css_typed_value_get (css_value), value);
103 gtk_css_custom_property_assign (GtkStyleProperty *property,
104 GtkStyleProperties *props,
108 GtkCssValue *css_value = _gtk_css_typed_value_new (value);
109 _gtk_style_properties_set_property_by_property (props,
110 GTK_CSS_STYLE_PROPERTY (property),
113 _gtk_css_value_unref (css_value);
117 _gtk_css_custom_property_class_init (GtkCssCustomPropertyClass *klass)
119 GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
121 property_class->parse_value = gtk_css_custom_property_parse_value;
122 property_class->query = gtk_css_custom_property_query;
123 property_class->assign = gtk_css_custom_property_assign;
127 gtk_css_custom_property_compute_value (GtkCssStyleProperty *property,
128 GtkStyleContext *context,
129 GtkCssValue *specified)
131 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
133 return _gtk_css_style_compute_value (context, custom->pspec->value_type, specified);
137 _gtk_css_custom_property_init (GtkCssCustomProperty *custom)
139 GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (custom);
141 style->compute_value = gtk_css_custom_property_compute_value;
145 gtk_css_custom_property_create_initial_value (GParamSpec *pspec)
147 GValue value = G_VALUE_INIT;
150 g_value_init (&value, pspec->value_type);
152 if (pspec->value_type == GTK_TYPE_THEMING_ENGINE)
153 g_value_set_object (&value, gtk_theming_engine_load (NULL));
154 else if (pspec->value_type == PANGO_TYPE_FONT_DESCRIPTION)
155 g_value_take_boxed (&value, pango_font_description_from_string ("Sans 10"));
156 else if (pspec->value_type == GDK_TYPE_RGBA)
159 gdk_rgba_parse (&color, "pink");
160 g_value_set_boxed (&value, &color);
162 else if (pspec->value_type == GDK_TYPE_COLOR)
165 gdk_color_parse ("pink", &color);
166 g_value_set_boxed (&value, &color);
168 else if (pspec->value_type == GTK_TYPE_BORDER)
170 g_value_take_boxed (&value, gtk_border_new ());
173 g_param_value_set_default (pspec, &value);
175 result = _gtk_css_typed_value_new (&value);
176 g_value_unset (&value);
181 /* Property registration functions */
184 * gtk_theming_engine_register_property: (skip)
185 * @name_space: namespace for the property name
186 * @parse_func: parsing function to use, or %NULL
187 * @pspec: the #GParamSpec for the new property
189 * Registers a property so it can be used in the CSS file format,
190 * on the CSS file the property will look like
191 * "-${@name_space}-${property_name}". being
192 * ${property_name} the given to @pspec. @name_space will usually
193 * be the theme engine name.
195 * For any type a @parse_func may be provided, being this function
196 * used for turning any property value (between ':' and ';') in
197 * CSS to the #GValue needed. For basic types there is already
198 * builtin parsing support, so %NULL may be provided for these
202 * Engines must ensure property registration happens exactly once,
203 * usually GTK+ deals with theming engines as singletons, so this
204 * should be guaranteed to happen once, but bear this in mind
205 * when creating #GtkThemeEngine<!-- -->s yourself.
209 * In order to make use of the custom registered properties in
210 * the CSS file, make sure the engine is loaded first by specifying
211 * the engine property, either in a previous rule or within the same
215 * engine: someengine;
216 * -SomeEngine-custom-property: 2;
224 gtk_theming_engine_register_property (const gchar *name_space,
225 GtkStylePropertyParser parse_func,
228 GtkCssCustomProperty *node;
229 GtkCssValue *initial;
232 g_return_if_fail (name_space != NULL);
233 g_return_if_fail (strchr (name_space, ' ') == NULL);
234 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
236 name = g_strdup_printf ("-%s-%s", name_space, pspec->name);
238 /* This also initializes the default properties */
239 if (_gtk_style_property_lookup (pspec->name))
241 g_warning ("a property with name '%s' already exists", name);
246 initial = gtk_css_custom_property_create_initial_value (pspec);
248 node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
249 "initial-value", initial,
251 "value-type", pspec->value_type,
254 node->property_parse_func = parse_func;
256 _gtk_css_value_unref (initial);
261 * gtk_style_properties_register_property: (skip)
262 * @parse_func: parsing function to use, or %NULL
263 * @pspec: the #GParamSpec for the new property
265 * Registers a property so it can be used in the CSS file format.
266 * This function is the low-level equivalent of
267 * gtk_theming_engine_register_property(), if you are implementing
268 * a theming engine, you want to use that function instead.
273 gtk_style_properties_register_property (GtkStylePropertyParser parse_func,
276 GtkCssCustomProperty *node;
277 GtkCssValue *initial;
279 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
281 /* This also initializes the default properties */
282 if (_gtk_style_property_lookup (pspec->name))
284 g_warning ("a property with name '%s' already exists", pspec->name);
288 initial = gtk_css_custom_property_create_initial_value (pspec);
290 node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
291 "initial-value", initial,
293 "value-type", pspec->value_type,
296 node->property_parse_func = parse_func;
298 _gtk_css_value_unref (initial);
302 * gtk_style_properties_lookup_property: (skip)
303 * @property_name: property name to look up
304 * @parse_func: (out): return location for the parse function
305 * @pspec: (out) (transfer none): return location for the #GParamSpec
307 * Returns %TRUE if a property has been registered, if @pspec or
308 * @parse_func are not %NULL, the #GParamSpec and parsing function
309 * will be respectively returned.
311 * Returns: %TRUE if the property is registered, %FALSE otherwise
316 gtk_style_properties_lookup_property (const gchar *property_name,
317 GtkStylePropertyParser *parse_func,
320 GtkStyleProperty *node;
321 gboolean found = FALSE;
323 g_return_val_if_fail (property_name != NULL, FALSE);
325 node = _gtk_style_property_lookup (property_name);
327 if (GTK_IS_CSS_CUSTOM_PROPERTY (node))
329 GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (node);
332 *pspec = custom->pspec;
335 *parse_func = custom->property_parse_func;