forked from AuroraMiddleware/gtk
170130f1d9
Add a fast path for parent selector matching that uses a bloom filter to quickly discard selectors that can't possibly match. Keep in mind that we match using a bloom filter, so we might accidentally include too many selectors when hash/bucket collisions occur. That's not a correctness problem though, because we'll do a real check afterwards. The idea for this change is taken from browsers, in particular WebKit.
168 lines
4.6 KiB
C
168 lines
4.6 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkstyleproviderprivate.h"
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#include "gtkintl.h"
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#include "gtkprivate.h"
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/**
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* SECTION:gtkstyleprovider
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* @Short_description: Interface to provide style information to GtkStyleContext
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* @Title: GtkStyleProvider
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* @See_also: #GtkStyleContext, #GtkCssProvider
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*
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* GtkStyleProvider is an interface used to provide style information to a #GtkStyleContext.
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* See gtk_style_context_add_provider() and gtk_style_context_add_provider_for_display().
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*/
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enum {
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CHANGED,
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LAST_SIGNAL
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};
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G_DEFINE_INTERFACE (GtkStyleProvider, gtk_style_provider, G_TYPE_OBJECT)
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static guint signals[LAST_SIGNAL];
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static void
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gtk_style_provider_default_init (GtkStyleProviderInterface *iface)
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{
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signals[CHANGED] = g_signal_new (I_("gtk-private-changed"),
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G_TYPE_FROM_INTERFACE (iface),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkStyleProviderInterface, changed),
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NULL, NULL,
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NULL,
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G_TYPE_NONE, 0);
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}
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GtkCssValue *
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gtk_style_provider_get_color (GtkStyleProvider *provider,
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const char *name)
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{
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GtkStyleProviderInterface *iface;
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/* for compat with gtk_symbolic_color_resolve() */
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if (provider == NULL)
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return NULL;
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gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), NULL);
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iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider);
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if (!iface->get_color)
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return NULL;
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return iface->get_color (provider, name);
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}
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GtkCssKeyframes *
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gtk_style_provider_get_keyframes (GtkStyleProvider *provider,
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const char *name)
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{
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GtkStyleProviderInterface *iface;
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gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), NULL);
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gtk_internal_return_val_if_fail (name != NULL, NULL);
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iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider);
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if (!iface->get_keyframes)
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return NULL;
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return iface->get_keyframes (provider, name);
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}
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void
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gtk_style_provider_lookup (GtkStyleProvider *provider,
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const GtkCountingBloomFilter *filter,
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GtkCssNode *node,
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GtkCssLookup *lookup,
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GtkCssChange *out_change)
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{
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GtkStyleProviderInterface *iface;
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gtk_internal_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
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gtk_internal_return_if_fail (GTK_IS_CSS_NODE (node));
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gtk_internal_return_if_fail (lookup != NULL);
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if (out_change)
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*out_change = 0;
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iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider);
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if (!iface->lookup)
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return;
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iface->lookup (provider, filter, node, lookup, out_change);
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}
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void
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gtk_style_provider_changed (GtkStyleProvider *provider)
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{
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gtk_internal_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
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g_signal_emit (provider, signals[CHANGED], 0);
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}
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GtkSettings *
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gtk_style_provider_get_settings (GtkStyleProvider *provider)
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{
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GtkStyleProviderInterface *iface;
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gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), NULL);
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iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider);
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if (!iface->get_settings)
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return NULL;
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return iface->get_settings (provider);
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}
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int
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gtk_style_provider_get_scale (GtkStyleProvider *provider)
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{
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GtkStyleProviderInterface *iface;
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gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), 1);
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iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider);
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if (!iface->get_scale)
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return 1;
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return iface->get_scale (provider);
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}
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void
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gtk_style_provider_emit_error (GtkStyleProvider *provider,
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GtkCssSection *section,
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GError *error)
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{
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GtkStyleProviderInterface *iface;
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iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider);
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if (iface->emit_error)
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iface->emit_error (provider, section, error);
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}
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