1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2012 Benjamin Otte <otte@gnome.org>
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 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/>.
20 #include "gtkstylecascadeprivate.h"
22 #include "gtkstyleprovider.h"
23 #include "gtkstyleproviderprivate.h"
25 typedef struct _GtkStyleCascadeIter GtkStyleCascadeIter;
26 typedef struct _GtkStyleProviderData GtkStyleProviderData;
28 struct _GtkStyleCascadeIter {
29 int parent_index; /* pointing at last index that was returned, not next one that should be returned */
30 int index; /* pointing at last index that was returned, not next one that should be returned */
33 struct _GtkStyleProviderData
35 GtkStyleProvider *provider;
39 static GtkStyleProvider *
40 gtk_style_cascade_iter_next (GtkStyleCascade *cascade,
41 GtkStyleCascadeIter *iter)
43 if (iter->parent_index > 0)
47 GtkStyleProviderData *data, *parent_data;
49 data = &g_array_index (cascade->providers, GtkStyleProviderData, iter->index - 1);
50 parent_data = &g_array_index (cascade->parent->providers, GtkStyleProviderData, iter->parent_index - 1);
52 if (data->priority >= parent_data->priority)
55 return data->provider;
60 return parent_data->provider;
66 return g_array_index (cascade->parent->providers, GtkStyleProviderData, iter->parent_index).provider;
74 return g_array_index (cascade->providers, GtkStyleProviderData, iter->index).provider;
83 static GtkStyleProvider *
84 gtk_style_cascade_iter_init (GtkStyleCascade *cascade,
85 GtkStyleCascadeIter *iter)
87 iter->parent_index = cascade->parent ? cascade->parent->providers->len : 0;
88 iter->index = cascade->providers->len;
90 return gtk_style_cascade_iter_next (cascade, iter);
93 static GtkStyleProperties *
94 gtk_style_cascade_get_style (GtkStyleProvider *provider,
97 /* This function is not used anymore by GTK and nobody
98 * else is ever supposed to call it */
104 gtk_style_cascade_get_style_property (GtkStyleProvider *provider,
110 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
111 GtkStyleCascadeIter iter;
112 GtkStyleProvider *item;
114 for (item = gtk_style_cascade_iter_init (cascade, &iter);
116 item = gtk_style_cascade_iter_next (cascade, &iter))
118 if (gtk_style_provider_get_style_property (item,
129 static GtkIconFactory *
130 gtk_style_cascade_get_icon_factory (GtkStyleProvider *provider,
133 /* If anyone ever implements get_icon_factory(), I'll
134 * look at this function. Until then I'll just: */
139 gtk_style_cascade_provider_iface_init (GtkStyleProviderIface *iface)
141 iface->get_style = gtk_style_cascade_get_style;
142 iface->get_style_property = gtk_style_cascade_get_style_property;
143 iface->get_icon_factory = gtk_style_cascade_get_icon_factory;
146 static GtkSymbolicColor *
147 gtk_style_cascade_get_color (GtkStyleProviderPrivate *provider,
150 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
151 GtkStyleCascadeIter iter;
152 GtkSymbolicColor *symbolic;
153 GtkStyleProvider *item;
155 for (item = gtk_style_cascade_iter_init (cascade, &iter);
157 item = gtk_style_cascade_iter_next (cascade, &iter))
159 if (GTK_IS_STYLE_PROVIDER_PRIVATE (item))
161 symbolic = _gtk_style_provider_private_get_color (GTK_STYLE_PROVIDER_PRIVATE (item), name);
167 /* If somebody hits this code path, shout at them */
175 gtk_style_cascade_lookup (GtkStyleProviderPrivate *provider,
176 const GtkCssMatcher *matcher,
177 GtkCssLookup *lookup)
179 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
180 GtkStyleCascadeIter iter;
181 GtkStyleProvider *item;
183 for (item = gtk_style_cascade_iter_init (cascade, &iter);
185 item = gtk_style_cascade_iter_next (cascade, &iter))
187 if (GTK_IS_STYLE_PROVIDER_PRIVATE (item))
189 _gtk_style_provider_private_lookup (GTK_STYLE_PROVIDER_PRIVATE (item),
196 g_warn_if_reached ();
202 gtk_style_cascade_get_change (GtkStyleProviderPrivate *provider,
203 const GtkCssMatcher *matcher)
205 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
206 GtkStyleCascadeIter iter;
207 GtkStyleProvider *item;
208 GtkCssChange change = 0;
210 for (item = gtk_style_cascade_iter_init (cascade, &iter);
212 item = gtk_style_cascade_iter_next (cascade, &iter))
214 if (GTK_IS_STYLE_PROVIDER_PRIVATE (item))
216 change |= _gtk_style_provider_private_get_change (GTK_STYLE_PROVIDER_PRIVATE (item),
221 g_return_val_if_reached (GTK_CSS_CHANGE_ANY);
229 gtk_style_cascade_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface)
231 iface->get_color = gtk_style_cascade_get_color;
232 iface->lookup = gtk_style_cascade_lookup;
233 iface->get_change = gtk_style_cascade_get_change;
236 G_DEFINE_TYPE_EXTENDED (GtkStyleCascade, _gtk_style_cascade, G_TYPE_OBJECT, 0,
237 G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER,
238 gtk_style_cascade_provider_iface_init)
239 G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER_PRIVATE,
240 gtk_style_cascade_provider_private_iface_init));
243 gtk_style_cascade_dispose (GObject *object)
245 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (object);
247 _gtk_style_cascade_set_parent (cascade, NULL);
248 g_array_unref (cascade->providers);
250 G_OBJECT_CLASS (_gtk_style_cascade_parent_class)->dispose (object);
254 _gtk_style_cascade_class_init (GtkStyleCascadeClass *klass)
256 GObjectClass *object_class = G_OBJECT_CLASS (klass);
258 object_class->dispose = gtk_style_cascade_dispose;
262 style_provider_data_clear (gpointer data_)
264 GtkStyleProviderData *data = data_;
266 g_object_unref (data->provider);
270 _gtk_style_cascade_init (GtkStyleCascade *cascade)
272 cascade->providers = g_array_new (FALSE, FALSE, sizeof (GtkStyleProviderData));
273 g_array_set_clear_func (cascade->providers, style_provider_data_clear);
277 _gtk_style_cascade_new (void)
279 return g_object_new (GTK_TYPE_STYLE_CASCADE, NULL);
283 _gtk_style_cascade_get_for_screen (GdkScreen *screen)
285 GtkStyleCascade *cascade;
286 static GQuark quark = 0;
288 g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
290 if (G_UNLIKELY (!quark))
291 quark = g_quark_from_static_string ("gtk-style-cascade");
293 cascade = g_object_get_qdata (G_OBJECT (screen), quark);
296 cascade = _gtk_style_cascade_new ();
297 g_object_set_qdata_full (G_OBJECT (screen), quark, cascade, g_object_unref);
304 _gtk_style_cascade_set_parent (GtkStyleCascade *cascade,
305 GtkStyleCascade *parent)
307 g_return_if_fail (GTK_IS_STYLE_CASCADE (cascade));
308 g_return_if_fail (parent == NULL || GTK_IS_STYLE_CASCADE (parent));
310 g_return_if_fail (parent->parent == NULL);
312 if (cascade->parent == parent)
316 g_object_ref (parent);
319 g_object_unref (cascade->parent);
321 cascade->parent = parent;
325 _gtk_style_cascade_add_provider (GtkStyleCascade *cascade,
326 GtkStyleProvider *provider,
329 GtkStyleProviderData data;
332 g_return_if_fail (GTK_IS_STYLE_CASCADE (cascade));
333 g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
334 g_return_if_fail (GTK_STYLE_PROVIDER (cascade) != provider);
336 data.provider = g_object_ref (provider);
337 data.priority = priority;
339 /* ensure it gets removed first */
340 _gtk_style_cascade_remove_provider (cascade, provider);
342 for (i = 0; i < cascade->providers->len; i++)
344 if (g_array_index (cascade->providers, GtkStyleProviderData, i).priority > priority)
347 g_array_insert_val (cascade->providers, i, data);
351 _gtk_style_cascade_remove_provider (GtkStyleCascade *cascade,
352 GtkStyleProvider *provider)
356 g_return_if_fail (GTK_IS_STYLE_CASCADE (cascade));
357 g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
359 for (i = 0; i < cascade->providers->len; i++)
361 GtkStyleProviderData *data = &g_array_index (cascade->providers, GtkStyleProviderData, i);
363 if (data->provider == provider)
365 g_array_remove_index (cascade->providers, i);