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;
37 guint changed_signal_id;
40 static GtkStyleProvider *
41 gtk_style_cascade_iter_next (GtkStyleCascade *cascade,
42 GtkStyleCascadeIter *iter)
44 if (iter->parent_index > 0)
48 GtkStyleProviderData *data, *parent_data;
50 data = &g_array_index (cascade->providers, GtkStyleProviderData, iter->index - 1);
51 parent_data = &g_array_index (cascade->parent->providers, GtkStyleProviderData, iter->parent_index - 1);
53 if (data->priority >= parent_data->priority)
56 return data->provider;
61 return parent_data->provider;
67 return g_array_index (cascade->parent->providers, GtkStyleProviderData, iter->parent_index).provider;
75 return g_array_index (cascade->providers, GtkStyleProviderData, iter->index).provider;
84 static GtkStyleProvider *
85 gtk_style_cascade_iter_init (GtkStyleCascade *cascade,
86 GtkStyleCascadeIter *iter)
88 iter->parent_index = cascade->parent ? cascade->parent->providers->len : 0;
89 iter->index = cascade->providers->len;
91 return gtk_style_cascade_iter_next (cascade, iter);
94 static GtkStyleProperties *
95 gtk_style_cascade_get_style (GtkStyleProvider *provider,
98 /* This function is not used anymore by GTK and nobody
99 * else is ever supposed to call it */
100 g_warn_if_reached ();
105 gtk_style_cascade_get_style_property (GtkStyleProvider *provider,
111 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
112 GtkStyleCascadeIter iter;
113 GtkStyleProvider *item;
115 for (item = gtk_style_cascade_iter_init (cascade, &iter);
117 item = gtk_style_cascade_iter_next (cascade, &iter))
119 if (gtk_style_provider_get_style_property (item,
130 static GtkIconFactory *
131 gtk_style_cascade_get_icon_factory (GtkStyleProvider *provider,
134 /* If anyone ever implements get_icon_factory(), I'll
135 * look at this function. Until then I'll just: */
140 gtk_style_cascade_provider_iface_init (GtkStyleProviderIface *iface)
142 iface->get_style = gtk_style_cascade_get_style;
143 iface->get_style_property = gtk_style_cascade_get_style_property;
144 iface->get_icon_factory = gtk_style_cascade_get_icon_factory;
147 static GtkSymbolicColor *
148 gtk_style_cascade_get_color (GtkStyleProviderPrivate *provider,
151 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
152 GtkStyleCascadeIter iter;
153 GtkSymbolicColor *symbolic;
154 GtkStyleProvider *item;
156 for (item = gtk_style_cascade_iter_init (cascade, &iter);
158 item = gtk_style_cascade_iter_next (cascade, &iter))
160 if (GTK_IS_STYLE_PROVIDER_PRIVATE (item))
162 symbolic = _gtk_style_provider_private_get_color (GTK_STYLE_PROVIDER_PRIVATE (item), name);
168 /* If somebody hits this code path, shout at them */
176 gtk_style_cascade_lookup (GtkStyleProviderPrivate *provider,
177 const GtkCssMatcher *matcher,
178 GtkCssLookup *lookup)
180 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
181 GtkStyleCascadeIter iter;
182 GtkStyleProvider *item;
184 for (item = gtk_style_cascade_iter_init (cascade, &iter);
186 item = gtk_style_cascade_iter_next (cascade, &iter))
188 if (GTK_IS_STYLE_PROVIDER_PRIVATE (item))
190 _gtk_style_provider_private_lookup (GTK_STYLE_PROVIDER_PRIVATE (item),
197 g_warn_if_reached ();
203 gtk_style_cascade_get_change (GtkStyleProviderPrivate *provider,
204 const GtkCssMatcher *matcher)
206 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (provider);
207 GtkStyleCascadeIter iter;
208 GtkStyleProvider *item;
209 GtkCssChange change = 0;
211 for (item = gtk_style_cascade_iter_init (cascade, &iter);
213 item = gtk_style_cascade_iter_next (cascade, &iter))
215 if (GTK_IS_STYLE_PROVIDER_PRIVATE (item))
217 change |= _gtk_style_provider_private_get_change (GTK_STYLE_PROVIDER_PRIVATE (item),
222 g_return_val_if_reached (GTK_CSS_CHANGE_ANY);
230 gtk_style_cascade_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface)
232 iface->get_color = gtk_style_cascade_get_color;
233 iface->lookup = gtk_style_cascade_lookup;
234 iface->get_change = gtk_style_cascade_get_change;
237 G_DEFINE_TYPE_EXTENDED (GtkStyleCascade, _gtk_style_cascade, G_TYPE_OBJECT, 0,
238 G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER,
239 gtk_style_cascade_provider_iface_init)
240 G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER_PRIVATE,
241 gtk_style_cascade_provider_private_iface_init));
244 gtk_style_cascade_dispose (GObject *object)
246 GtkStyleCascade *cascade = GTK_STYLE_CASCADE (object);
248 _gtk_style_cascade_set_parent (cascade, NULL);
249 g_array_unref (cascade->providers);
251 G_OBJECT_CLASS (_gtk_style_cascade_parent_class)->dispose (object);
255 _gtk_style_cascade_class_init (GtkStyleCascadeClass *klass)
257 GObjectClass *object_class = G_OBJECT_CLASS (klass);
259 object_class->dispose = gtk_style_cascade_dispose;
263 style_provider_data_clear (gpointer data_)
265 GtkStyleProviderData *data = data_;
267 g_signal_handler_disconnect (data->provider, data->changed_signal_id);
268 g_object_unref (data->provider);
272 _gtk_style_cascade_init (GtkStyleCascade *cascade)
274 cascade->providers = g_array_new (FALSE, FALSE, sizeof (GtkStyleProviderData));
275 g_array_set_clear_func (cascade->providers, style_provider_data_clear);
279 _gtk_style_cascade_new (void)
281 return g_object_new (GTK_TYPE_STYLE_CASCADE, NULL);
285 _gtk_style_cascade_get_for_screen (GdkScreen *screen)
287 GtkStyleCascade *cascade;
288 static GQuark quark = 0;
290 g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
292 if (G_UNLIKELY (!quark))
293 quark = g_quark_from_static_string ("gtk-style-cascade");
295 cascade = g_object_get_qdata (G_OBJECT (screen), quark);
298 cascade = _gtk_style_cascade_new ();
299 g_object_set_qdata_full (G_OBJECT (screen), quark, cascade, g_object_unref);
306 _gtk_style_cascade_set_parent (GtkStyleCascade *cascade,
307 GtkStyleCascade *parent)
309 g_return_if_fail (GTK_IS_STYLE_CASCADE (cascade));
310 g_return_if_fail (parent == NULL || GTK_IS_STYLE_CASCADE (parent));
312 g_return_if_fail (parent->parent == NULL);
314 if (cascade->parent == parent)
319 g_object_ref (parent);
320 g_signal_connect_swapped (parent,
321 "-gtk-private-changed",
322 G_CALLBACK (_gtk_style_provider_private_changed),
328 g_signal_handlers_disconnect_by_func (cascade->parent,
329 _gtk_style_provider_private_changed,
331 g_object_unref (cascade->parent);
334 cascade->parent = parent;
338 _gtk_style_cascade_add_provider (GtkStyleCascade *cascade,
339 GtkStyleProvider *provider,
342 GtkStyleProviderData data;
345 g_return_if_fail (GTK_IS_STYLE_CASCADE (cascade));
346 g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
347 g_return_if_fail (GTK_STYLE_PROVIDER (cascade) != provider);
349 data.provider = g_object_ref (provider);
350 data.priority = priority;
351 data.changed_signal_id = g_signal_connect_swapped (provider,
352 "-gtk-private-changed",
353 G_CALLBACK (_gtk_style_provider_private_changed),
356 /* ensure it gets removed first */
357 _gtk_style_cascade_remove_provider (cascade, provider);
359 for (i = 0; i < cascade->providers->len; i++)
361 if (g_array_index (cascade->providers, GtkStyleProviderData, i).priority > priority)
364 g_array_insert_val (cascade->providers, i, data);
366 _gtk_style_provider_private_changed (GTK_STYLE_PROVIDER_PRIVATE (cascade));
370 _gtk_style_cascade_remove_provider (GtkStyleCascade *cascade,
371 GtkStyleProvider *provider)
375 g_return_if_fail (GTK_IS_STYLE_CASCADE (cascade));
376 g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
378 for (i = 0; i < cascade->providers->len; i++)
380 GtkStyleProviderData *data = &g_array_index (cascade->providers, GtkStyleProviderData, i);
382 if (data->provider == provider)
384 g_array_remove_index (cascade->providers, i);
386 _gtk_style_provider_private_changed (GTK_STYLE_PROVIDER_PRIVATE (cascade));