gtk2/gtk/gtkcssstaticstyle.c

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/*
* Copyright © 2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkcssstaticstyleprivate.h"
#include "gtkcssanimationprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssinheritvalueprivate.h"
#include "gtkcssinitialvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcsssectionprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstringvalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkcsstransitionprivate.h"
#include "gtkprivate.h"
#include "gtksettings.h"
#include "gtkstyleanimationprivate.h"
#include "gtkstylepropertyprivate.h"
#include "gtkstyleproviderprivate.h"
G_DEFINE_TYPE (GtkCssStaticStyle, gtk_css_static_style, GTK_TYPE_CSS_STYLE)
static GtkCssValue *
gtk_css_static_style_get_value (GtkCssStyle *style,
guint id)
{
GtkCssStaticStyle *sstyle = GTK_CSS_STATIC_STYLE (style);
if (sstyle->values == NULL ||
id >= sstyle->values->len)
return NULL;
return g_ptr_array_index (sstyle->values, id);
}
static GtkCssSection *
gtk_css_static_style_get_section (GtkCssStyle *style,
guint id)
{
GtkCssStaticStyle *sstyle = GTK_CSS_STATIC_STYLE (style);
if (sstyle->sections == NULL ||
id >= sstyle->sections->len)
return NULL;
return g_ptr_array_index (sstyle->sections, id);
}
/* Compute the bitmask of potentially changed properties if the parent has changed
* the passed in ones.
* This is for example needed when changes in the "color" property will affect
* all properties using "currentColor" as a color.
*/
static GtkBitmask *
gtk_css_static_style_compute_dependencies (GtkCssStaticStyle *style,
const GtkBitmask *parent_changes)
{
GtkCssStaticStyle *sstyle = GTK_CSS_STATIC_STYLE (style);
GtkBitmask *changes;
changes = _gtk_bitmask_copy (parent_changes);
changes = _gtk_bitmask_intersect (changes, sstyle->depends_on_parent);
if (_gtk_bitmask_get (changes, GTK_CSS_PROPERTY_COLOR))
changes = _gtk_bitmask_union (changes, sstyle->depends_on_color);
if (_gtk_bitmask_get (changes, GTK_CSS_PROPERTY_FONT_SIZE))
changes = _gtk_bitmask_union (changes, sstyle->depends_on_font_size);
return changes;
}
static void
gtk_css_static_style_dispose (GObject *object)
{
GtkCssStaticStyle *style = GTK_CSS_STATIC_STYLE (object);
if (style->values)
{
g_ptr_array_unref (style->values);
style->values = NULL;
}
if (style->sections)
{
g_ptr_array_unref (style->sections);
style->sections = NULL;
}
G_OBJECT_CLASS (gtk_css_static_style_parent_class)->dispose (object);
}
static void
gtk_css_static_style_finalize (GObject *object)
{
GtkCssStaticStyle *style = GTK_CSS_STATIC_STYLE (object);
_gtk_bitmask_free (style->depends_on_parent);
_gtk_bitmask_free (style->equals_parent);
_gtk_bitmask_free (style->depends_on_color);
_gtk_bitmask_free (style->depends_on_font_size);
G_OBJECT_CLASS (gtk_css_static_style_parent_class)->finalize (object);
}
static void
gtk_css_static_style_class_init (GtkCssStaticStyleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkCssStyleClass *style_class = GTK_CSS_STYLE_CLASS (klass);
object_class->dispose = gtk_css_static_style_dispose;
object_class->finalize = gtk_css_static_style_finalize;
style_class->get_value = gtk_css_static_style_get_value;
style_class->get_section = gtk_css_static_style_get_section;
}
static void
gtk_css_static_style_init (GtkCssStaticStyle *style)
{
style->depends_on_parent = _gtk_bitmask_new ();
style->equals_parent = _gtk_bitmask_new ();
style->depends_on_color = _gtk_bitmask_new ();
style->depends_on_font_size = _gtk_bitmask_new ();
}
static void
maybe_unref_section (gpointer section)
{
if (section)
gtk_css_section_unref (section);
}
static void
gtk_css_static_style_set_value (GtkCssStaticStyle *style,
guint id,
GtkCssValue *value,
GtkCssSection *section)
{
if (style->values == NULL)
style->values = g_ptr_array_new_with_free_func ((GDestroyNotify)_gtk_css_value_unref);
if (id >= style->values->len)
g_ptr_array_set_size (style->values, id + 1);
if (g_ptr_array_index (style->values, id))
_gtk_css_value_unref (g_ptr_array_index (style->values, id));
g_ptr_array_index (style->values, id) = _gtk_css_value_ref (value);
if (style->sections && style->sections->len > id && g_ptr_array_index (style->sections, id))
{
gtk_css_section_unref (g_ptr_array_index (style->sections, id));
g_ptr_array_index (style->sections, id) = NULL;
}
if (section)
{
if (style->sections == NULL)
style->sections = g_ptr_array_new_with_free_func (maybe_unref_section);
if (style->sections->len <= id)
g_ptr_array_set_size (style->sections, id + 1);
g_ptr_array_index (style->sections, id) = gtk_css_section_ref (section);
}
}
GtkCssStyle *
gtk_css_static_style_get_default (void)
{
static GQuark style_quark = 0;
GtkSettings *settings;
GtkCssStyle *result;
if (style_quark == 0)
style_quark = g_quark_from_string ("gtk-default-style");
settings = gtk_settings_get_for_screen (gdk_screen_get_default ());
result = g_object_get_qdata (G_OBJECT (settings), style_quark);
if (result)
return result;
result = gtk_css_static_style_new_compute (GTK_STYLE_PROVIDER_PRIVATE (settings),
NULL,
NULL);
g_object_set_qdata_full (G_OBJECT (settings), style_quark, result, g_object_unref);
return result;
}
GtkCssStyle *
gtk_css_static_style_new_compute (GtkStyleProviderPrivate *provider,
const GtkCssMatcher *matcher,
GtkCssStyle *parent)
{
GtkCssStaticStyle *result;
GtkCssLookup *lookup;
GtkCssChange change = GTK_CSS_CHANGE_ANY_SELF | GTK_CSS_CHANGE_ANY_SIBLING | GTK_CSS_CHANGE_ANY_PARENT;
lookup = _gtk_css_lookup_new (NULL);
if (matcher)
_gtk_style_provider_private_lookup (provider,
matcher,
lookup,
&change);
result = g_object_new (GTK_TYPE_CSS_STATIC_STYLE, NULL);
result->change = change;
_gtk_css_lookup_resolve (lookup,
provider,
result,
parent);
_gtk_css_lookup_free (lookup);
return GTK_CSS_STYLE (result);
}
GtkCssStyle *
gtk_css_static_style_new_update (GtkCssStaticStyle *style,
const GtkBitmask *parent_changes,
GtkStyleProviderPrivate *provider,
const GtkCssMatcher *matcher,
GtkCssStyle *parent)
{
GtkCssStaticStyle *result;
GtkCssLookup *lookup;
GtkBitmask *changes;
guint i;
gtk_internal_return_val_if_fail (GTK_IS_CSS_STATIC_STYLE (style), NULL);
gtk_internal_return_val_if_fail (parent_changes != NULL, NULL);
gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER_PRIVATE (provider), NULL);
gtk_internal_return_val_if_fail (matcher != NULL, NULL);
changes = gtk_css_static_style_compute_dependencies (style, parent_changes);
if (_gtk_bitmask_is_empty (changes))
{
_gtk_bitmask_free (changes);
return g_object_ref (style);
}
result = g_object_new (GTK_TYPE_CSS_STATIC_STYLE, NULL);
result->change = style->change;
result->depends_on_parent = _gtk_bitmask_subtract (_gtk_bitmask_union (result->depends_on_parent, style->depends_on_parent),
changes);
result->equals_parent = _gtk_bitmask_subtract (_gtk_bitmask_union (result->equals_parent, style->equals_parent),
changes);
result->depends_on_color = _gtk_bitmask_subtract (_gtk_bitmask_union (result->depends_on_color, style->depends_on_color),
changes);
result->depends_on_font_size = _gtk_bitmask_subtract (_gtk_bitmask_union (result->depends_on_font_size, style->depends_on_font_size),
changes);
for (i = 0; i < style->values->len; i++)
{
if (_gtk_bitmask_get (changes, i))
continue;
gtk_css_static_style_set_value (result,
i,
gtk_css_static_style_get_value (GTK_CSS_STYLE (style), i),
gtk_css_static_style_get_section (GTK_CSS_STYLE (style), i));
}
lookup = _gtk_css_lookup_new (changes);
_gtk_style_provider_private_lookup (provider,
matcher,
lookup,
NULL);
_gtk_css_lookup_resolve (lookup,
provider,
result,
parent);
_gtk_css_lookup_free (lookup);
_gtk_bitmask_free (changes);
return GTK_CSS_STYLE (result);
}
void
gtk_css_static_style_compute_value (GtkCssStaticStyle *style,
GtkStyleProviderPrivate *provider,
GtkCssStyle *parent_style,
guint id,
GtkCssValue *specified,
GtkCssSection *section)
{
GtkCssDependencies dependencies;
GtkCssValue *value;
gtk_internal_return_if_fail (GTK_IS_CSS_STATIC_STYLE (style));
gtk_internal_return_if_fail (GTK_IS_STYLE_PROVIDER_PRIVATE (provider));
gtk_internal_return_if_fail (parent_style == NULL || GTK_IS_CSS_STYLE (parent_style));
/* http://www.w3.org/TR/css3-cascade/#cascade
* Then, for every element, the value for each property can be found
* by following this pseudo-algorithm:
* 1) Identify all declarations that apply to the element
*/
if (specified == NULL)
{
GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (id);
if (_gtk_css_style_property_is_inherit (prop))
specified = _gtk_css_inherit_value_new ();
else
specified = _gtk_css_initial_value_new ();
}
else
_gtk_css_value_ref (specified);
value = _gtk_css_value_compute (specified, id, provider, GTK_CSS_STYLE (style), parent_style, &dependencies);
gtk_css_static_style_set_value (style, id, value, section);
if (dependencies & (GTK_CSS_DEPENDS_ON_PARENT | GTK_CSS_EQUALS_PARENT))
style->depends_on_parent = _gtk_bitmask_set (style->depends_on_parent, id, TRUE);
if (dependencies & (GTK_CSS_EQUALS_PARENT))
style->equals_parent = _gtk_bitmask_set (style->equals_parent, id, TRUE);
if (dependencies & (GTK_CSS_DEPENDS_ON_COLOR))
style->depends_on_color = _gtk_bitmask_set (style->depends_on_color, id, TRUE);
if (dependencies & (GTK_CSS_DEPENDS_ON_FONT_SIZE))
style->depends_on_font_size = _gtk_bitmask_set (style->depends_on_font_size, id, TRUE);
_gtk_css_value_unref (value);
_gtk_css_value_unref (specified);
}
GtkCssChange
gtk_css_static_style_get_change (GtkCssStaticStyle *style)
{
g_return_val_if_fail (GTK_IS_CSS_STATIC_STYLE (style), GTK_CSS_CHANGE_ANY);
return style->change;
}