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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Benjamin Otte <otte@gnome.org>
*
* 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 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/>.
*/
#include "config.h"
#include "gtkcsslookupprivate.h"
#include "gtkcsstypesprivate.h"
#include "gtkprivatetypebuiltins.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkstylepropertiesprivate.h"
typedef struct {
GtkCssSection *section;
GtkCssValue *value;
GtkCssValue *computed;
} GtkCssLookupValue;
struct _GtkCssLookup {
GtkBitmask *missing;
GtkCssLookupValue values[1];
};
GtkCssLookup *
_gtk_css_lookup_new (void)
{
GtkCssLookup *lookup;
guint n = _gtk_css_style_property_get_n_properties ();
lookup = g_malloc0 (sizeof (GtkCssLookup) + sizeof (GtkCssLookupValue) * n);
lookup->missing = _gtk_bitmask_new ();
lookup->missing = _gtk_bitmask_invert_range (lookup->missing, 0, n);
return lookup;
}
void
_gtk_css_lookup_free (GtkCssLookup *lookup)
{
g_return_if_fail (lookup != NULL);
_gtk_bitmask_free (lookup->missing);
g_free (lookup);
}
const GtkBitmask *
_gtk_css_lookup_get_missing (const GtkCssLookup *lookup)
{
g_return_val_if_fail (lookup != NULL, NULL);
return lookup->missing;
}
gboolean
_gtk_css_lookup_is_missing (const GtkCssLookup *lookup,
guint id)
{
g_return_val_if_fail (lookup != NULL, FALSE);
return _gtk_bitmask_get (lookup->missing, id);
}
/**
* _gtk_css_lookup_set:
* @lookup: the lookup
* @id: id of the property to set, see _gtk_style_property_get_id()
* @section: (allow-none): The @section the value was defined in or %NULL
* @value: the "cascading value" to use
*
* Sets the @value for a given @id. No value may have been set for @id
* before. See _gtk_css_lookup_is_missing(). This function is used to
* set the "winning declaration" of a lookup. Note that for performance
* reasons @value and @section are not copied. It is your responsibility
* to ensure they are kept alive until _gtk_css_lookup_free() is called.
**/
void
_gtk_css_lookup_set (GtkCssLookup *lookup,
guint id,
GtkCssSection *section,
GtkCssValue *value)
{
g_return_if_fail (lookup != NULL);
g_return_if_fail (_gtk_bitmask_get (lookup->missing, id));
g_return_if_fail (value != NULL);
lookup->missing = _gtk_bitmask_set (lookup->missing, id, FALSE);
lookup->values[id].value = value;
lookup->values[id].section = section;
}
/**
* _gtk_css_lookup_set_computed:
* @lookup: the lookup
* @id: id of the property to set, see _gtk_style_property_get_id()
* @section: (allow-none): The @section the value was defined in or %NULL
* @value: the "computed value" to use
*
* Sets the @value for a given @id. No value may have been set for @id
* before. See _gtk_css_lookup_is_missing(). This function is used to
* set the "winning declaration" of a lookup. Note that for performance
* reasons @value and @section are not copied. It is your responsibility
* to ensure they are kept alive until _gtk_css_lookup_free() is called.
*
* As opposed to _gtk_css_lookup_set(), this function forces a computed
* value and will not cause computation to happen. In particular, with this
* method relative lengths or symbolic colors can not be used. This is
* usually only useful for doing overrides. It should not be used for proper
* CSS.
**/
void
_gtk_css_lookup_set_computed (GtkCssLookup *lookup,
guint id,
GtkCssSection *section,
GtkCssValue *value)
{
g_return_if_fail (lookup != NULL);
g_return_if_fail (_gtk_bitmask_get (lookup->missing, id));
g_return_if_fail (value != NULL);
lookup->missing = _gtk_bitmask_set (lookup->missing, id, FALSE);
lookup->values[id].computed = value;
lookup->values[id].section = section;
}
/**
* _gtk_css_lookup_resolve:
* @lookup: the lookup
* @context: the context the values are resolved for
* @values: a new #GtkCssComputedValues to be filled with the new properties
*
* Resolves the current lookup into a styleproperties object. This is done
* by converting from the "winning declaration" to the "computed value".
*
* XXX: This bypasses the notion of "specified value". If this ever becomes
* an issue, go fix it.
**/
void
_gtk_css_lookup_resolve (GtkCssLookup *lookup,
GtkStyleContext *context,
GtkCssComputedValues *values)
{
guint i, n;
g_return_if_fail (lookup != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
n = _gtk_css_style_property_get_n_properties ();
for (i = 0; i < n; i++)
{
if (lookup->values[i].computed)
_gtk_css_computed_values_set_value (values,
i,
lookup->values[i].computed,
lookup->values[i].section);
else
_gtk_css_computed_values_compute_value (values,
context,
i,
lookup->values[i].value,
lookup->values[i].section);
}
}
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