gtk2/gtk/gtkcsslookup.c
Alexander Larsson af2c40bd54 css: Add a scale argument to css-value compute vfunc
We need to be able to compute different GtkCssImage values
depending on the scale, and we need this at compute time so that
we don't need to read any images other than the scale in used (to
e.g. calculate the image size). GtkStyleProviderPrivate is shared
for all style contexts, so its not right.
2013-07-03 14:39:25 +02:00

176 lines
6.1 KiB
C

/* 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"
GtkCssLookup *
_gtk_css_lookup_new (const GtkBitmask *relevant)
{
GtkCssLookup *lookup;
guint n = _gtk_css_style_property_get_n_properties ();
lookup = g_malloc0 (sizeof (GtkCssLookup) + sizeof (GtkCssLookupValue) * n);
if (relevant)
{
lookup->missing = _gtk_bitmask_copy (relevant);
}
else
{
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);
}
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,
GtkStyleProviderPrivate *provider,
int scale,
GtkCssComputedValues *values,
GtkCssComputedValues *parent_values)
{
guint i, n;
g_return_if_fail (lookup != NULL);
g_return_if_fail (GTK_IS_STYLE_PROVIDER_PRIVATE (provider));
g_return_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values));
g_return_if_fail (parent_values == NULL || GTK_IS_CSS_COMPUTED_VALUES (parent_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,
0,
lookup->values[i].section);
else if (lookup->values[i].value ||
_gtk_bitmask_get (lookup->missing, i))
_gtk_css_computed_values_compute_value (values,
provider,
scale,
parent_values,
i,
lookup->values[i].value,
lookup->values[i].section);
/* else not a relevant property */
}
}