forked from AuroraMiddleware/gtk
31aa5a0e53
When a css value has "child" css values (e.g. a linear gradient has several color stop css values) which are all computed (won't change when compute() is called on them), we want to skip computing the entire subtree. Since css values are immutable, we can set the is_computed flag at construct time. Since GtkCssValue instances are 0-initialized in _gtk_css_value_alloc, the default for is_computed it FALSE. This commit only sets it to TRUE in a few cases, such as various "none" singleton values which will never change. Later commits will refine this and set it for more values.
101 lines
5.4 KiB
C
101 lines
5.4 KiB
C
/*
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* Copyright © 2012 Red Hat Inc.
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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 2.1 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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* Authors: Alexander Larsson <alexl@gnome.org>
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*/
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#ifndef __GTK_CSS_VALUE_PRIVATE_H__
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#define __GTK_CSS_VALUE_PRIVATE_H__
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#include <glib-object.h>
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#include "gtkcsstypesprivate.h"
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#include "gtkstyleprovider.h"
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G_BEGIN_DECLS
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#define GTK_TYPE_CSS_VALUE (_gtk_css_value_get_type ())
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/* A GtkCssValue is a refcounted immutable value type */
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typedef struct _GtkCssValue GtkCssValue;
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typedef struct _GtkCssValueClass GtkCssValueClass;
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/* using define instead of struct here so compilers get the packing right */
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#define GTK_CSS_VALUE_BASE \
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const GtkCssValueClass *class; \
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gint ref_count; \
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guint is_computed: 1;
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struct _GtkCssValueClass {
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const char *type_name;
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void (* free) (GtkCssValue *value);
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GtkCssValue * (* compute) (GtkCssValue *value,
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guint property_id,
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GtkStyleProvider *provider,
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GtkCssStyle *style,
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GtkCssStyle *parent_style);
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gboolean (* equal) (const GtkCssValue *value1,
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const GtkCssValue *value2);
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GtkCssValue * (* transition) (GtkCssValue *start,
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GtkCssValue *end,
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guint property_id,
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double progress);
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gboolean (* is_dynamic) (GtkCssValue *value);
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GtkCssValue * (* get_dynamic_value) (GtkCssValue *value,
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gint64 monotonic_time);
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void (* print) (const GtkCssValue *value,
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GString *string);
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};
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GType _gtk_css_value_get_type (void) G_GNUC_CONST;
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GtkCssValue *_gtk_css_value_alloc (const GtkCssValueClass *klass,
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gsize size);
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#define _gtk_css_value_new(_name, _klass) ((_name *) _gtk_css_value_alloc ((_klass), sizeof (_name)))
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#define _gtk_css_value_ref gtk_css_value_ref
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GtkCssValue * gtk_css_value_ref (GtkCssValue *value);
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#define _gtk_css_value_unref gtk_css_value_unref
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void gtk_css_value_unref (GtkCssValue *value);
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GtkCssValue *_gtk_css_value_compute (GtkCssValue *value,
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guint property_id,
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GtkStyleProvider *provider,
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GtkCssStyle *style,
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GtkCssStyle *parent_style);
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gboolean _gtk_css_value_equal (const GtkCssValue *value1,
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const GtkCssValue *value2);
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gboolean _gtk_css_value_equal0 (const GtkCssValue *value1,
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const GtkCssValue *value2);
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GtkCssValue *_gtk_css_value_transition (GtkCssValue *start,
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GtkCssValue *end,
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guint property_id,
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double progress);
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gboolean gtk_css_value_is_dynamic (GtkCssValue *value);
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GtkCssValue * gtk_css_value_get_dynamic_value (GtkCssValue *value,
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gint64 monotonic_time);
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char * _gtk_css_value_to_string (const GtkCssValue *value);
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void _gtk_css_value_print (const GtkCssValue *value,
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GString *string);
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gboolean gtk_css_value_is_computed (const GtkCssValue *value) G_GNUC_PURE;
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G_END_DECLS
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#endif /* __GTK_CSS_VALUE_PRIVATE_H__ */
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