gtk2/gtk/gtkcssstyleproperty.c
2012-12-13 21:54:50 -05:00

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/*
* Copyright © 2011 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 "gtkcssstylepropertyprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssinheritvalueprivate.h"
#include "gtkcssinitialvalueprivate.h"
#include "gtkcssstylefuncsprivate.h"
#include "gtkcsstypesprivate.h"
#include "gtkintl.h"
#include "gtkprivatetypebuiltins.h"
#include "gtkstylepropertiesprivate.h"
/* this is in case round() is not provided by the compiler,
* such as in the case of C89 compilers, like MSVC
*/
#include "fallback-c89.c"
enum {
PROP_0,
PROP_ANIMATED,
PROP_AFFECTS_SIZE,
PROP_AFFECTS_FONT,
PROP_ID,
PROP_INHERIT,
PROP_INITIAL
};
G_DEFINE_TYPE (GtkCssStyleProperty, _gtk_css_style_property, GTK_TYPE_STYLE_PROPERTY)
static GtkBitmask *_properties_affecting_size = NULL;
static GtkBitmask *_properties_affecting_font = NULL;
static GtkCssStylePropertyClass *gtk_css_style_property_class = NULL;
static void
gtk_css_style_property_constructed (GObject *object)
{
GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
GtkCssStylePropertyClass *klass = GTK_CSS_STYLE_PROPERTY_GET_CLASS (property);
property->id = klass->style_properties->len;
g_ptr_array_add (klass->style_properties, property);
if (property->affects_size)
_properties_affecting_size = _gtk_bitmask_set (_properties_affecting_size, property->id, TRUE);
if (property->affects_font)
_properties_affecting_font = _gtk_bitmask_set (_properties_affecting_font, property->id, TRUE);
G_OBJECT_CLASS (_gtk_css_style_property_parent_class)->constructed (object);
}
static void
gtk_css_style_property_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
switch (prop_id)
{
case PROP_ANIMATED:
property->animated = g_value_get_boolean (value);
break;
case PROP_AFFECTS_SIZE:
property->affects_size = g_value_get_boolean (value);
break;
case PROP_AFFECTS_FONT:
property->affects_font = g_value_get_boolean (value);
break;
case PROP_INHERIT:
property->inherit = g_value_get_boolean (value);
break;
case PROP_INITIAL:
property->initial_value = g_value_dup_boxed (value);
g_assert (property->initial_value != NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_css_style_property_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
switch (prop_id)
{
case PROP_ANIMATED:
g_value_set_boolean (value, property->animated);
break;
case PROP_AFFECTS_SIZE:
g_value_set_boolean (value, property->affects_size);
break;
case PROP_AFFECTS_FONT:
g_value_set_boolean (value, property->affects_font);
break;
case PROP_ID:
g_value_set_boolean (value, property->id);
break;
case PROP_INHERIT:
g_value_set_boolean (value, property->inherit);
break;
case PROP_INITIAL:
g_value_set_boxed (value, property->initial_value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_gtk_css_style_property_assign (GtkStyleProperty *property,
GtkStyleProperties *props,
GtkStateFlags state,
const GValue *value)
{
GtkCssStyleProperty *style;
GtkCssValue *css_value;
style = GTK_CSS_STYLE_PROPERTY (property);
css_value = style->assign_value (style, value);
_gtk_style_properties_set_property_by_property (props,
style,
state,
css_value);
_gtk_css_value_unref (css_value);
}
static gboolean
_gtk_css_style_property_query_special_case (GtkCssStyleProperty *property,
GValue *value,
GtkStyleQueryFunc query_func,
gpointer query_data)
{
GtkBorderStyle border_style;
switch (property->id)
{
case GTK_CSS_PROPERTY_BORDER_TOP_WIDTH:
border_style = _gtk_css_border_style_value_get (query_func (GTK_CSS_PROPERTY_BORDER_TOP_STYLE, query_data));
if (border_style == GTK_BORDER_STYLE_NONE || border_style == GTK_BORDER_STYLE_HIDDEN)
{
g_value_init (value, G_TYPE_INT);
return TRUE;
}
break;
case GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH:
border_style = _gtk_css_border_style_value_get (query_func (GTK_CSS_PROPERTY_BORDER_RIGHT_STYLE, query_data));
if (border_style == GTK_BORDER_STYLE_NONE || border_style == GTK_BORDER_STYLE_HIDDEN)
{
g_value_init (value, G_TYPE_INT);
return TRUE;
}
break;
case GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH:
border_style = _gtk_css_border_style_value_get (query_func (GTK_CSS_PROPERTY_BORDER_BOTTOM_STYLE, query_data));
if (border_style == GTK_BORDER_STYLE_NONE || border_style == GTK_BORDER_STYLE_HIDDEN)
{
g_value_init (value, G_TYPE_INT);
return TRUE;
}
break;
case GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH:
border_style = _gtk_css_border_style_value_get (query_func (GTK_CSS_PROPERTY_BORDER_LEFT_STYLE, query_data));
if (border_style == GTK_BORDER_STYLE_NONE || border_style == GTK_BORDER_STYLE_HIDDEN)
{
g_value_init (value, G_TYPE_INT);
return TRUE;
}
break;
case GTK_CSS_PROPERTY_OUTLINE_WIDTH:
border_style = _gtk_css_border_style_value_get (query_func (GTK_CSS_PROPERTY_OUTLINE_STYLE, query_data));
if (border_style == GTK_BORDER_STYLE_NONE || border_style == GTK_BORDER_STYLE_HIDDEN)
{
g_value_init (value, G_TYPE_INT);
return TRUE;
}
break;
default:
break;
}
return FALSE;
}
static void
_gtk_css_style_property_query (GtkStyleProperty *property,
GValue *value,
GtkStyleQueryFunc query_func,
gpointer query_data)
{
GtkCssStyleProperty *style_property = GTK_CSS_STYLE_PROPERTY (property);
GtkCssValue *css_value;
/* I don't like this special case being here in this generic code path, but no idea where else to put it. */
if (_gtk_css_style_property_query_special_case (style_property, value, query_func, query_data))
return;
css_value = (* query_func) (GTK_CSS_STYLE_PROPERTY (property)->id, query_data);
if (css_value == NULL)
css_value =_gtk_css_style_property_get_initial_value (style_property);
style_property->query_value (style_property, css_value, value);
}
static GtkCssValue *
gtk_css_style_property_parse_value (GtkStyleProperty *property,
GtkCssParser *parser)
{
GtkCssStyleProperty *style_property = GTK_CSS_STYLE_PROPERTY (property);
if (_gtk_css_parser_try (parser, "initial", TRUE))
{
/* the initial value can be explicitly specified with the
* initial keyword which all properties accept.
*/
return _gtk_css_initial_value_new ();
}
else if (_gtk_css_parser_try (parser, "inherit", TRUE))
{
/* All properties accept the inherit value which
* explicitly specifies that the value will be determined
* by inheritance. The inherit value can be used to
* strengthen inherited values in the cascade, and it can
* also be used on properties that are not normally inherited.
*/
return _gtk_css_inherit_value_new ();
}
return (* style_property->parse_value) (style_property, parser);
}
static void
_gtk_css_style_property_class_init (GtkCssStylePropertyClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
object_class->constructed = gtk_css_style_property_constructed;
object_class->set_property = gtk_css_style_property_set_property;
object_class->get_property = gtk_css_style_property_get_property;
g_object_class_install_property (object_class,
PROP_ANIMATED,
g_param_spec_boolean ("animated",
P_("Animated"),
P_("Set if the value can be animated"),
FALSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_AFFECTS_SIZE,
g_param_spec_boolean ("affects-size",
P_("Affects size"),
P_("Set if the value affects the sizing of elements"),
TRUE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_AFFECTS_FONT,
g_param_spec_boolean ("affects-font",
P_("Affects font"),
P_("Set if the value affects the font"),
FALSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_ID,
g_param_spec_uint ("id",
P_("ID"),
P_("The numeric id for quick access"),
0, G_MAXUINT, 0,
G_PARAM_READABLE));
g_object_class_install_property (object_class,
PROP_INHERIT,
g_param_spec_boolean ("inherit",
P_("Inherit"),
P_("Set if the value is inherited by default"),
FALSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_INITIAL,
g_param_spec_boxed ("initial-value",
P_("Initial value"),
P_("The initial specified value used for this property"),
GTK_TYPE_CSS_VALUE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
property_class->assign = _gtk_css_style_property_assign;
property_class->query = _gtk_css_style_property_query;
property_class->parse_value = gtk_css_style_property_parse_value;
klass->style_properties = g_ptr_array_new ();
_properties_affecting_size = _gtk_bitmask_new ();
_properties_affecting_font = _gtk_bitmask_new ();
gtk_css_style_property_class = klass;
}
static GtkCssValue *
gtk_css_style_property_real_parse_value (GtkCssStyleProperty *property,
GtkCssParser *parser)
{
g_assert_not_reached ();
return NULL;
}
static void
_gtk_css_style_property_init (GtkCssStyleProperty *property)
{
property->parse_value = gtk_css_style_property_real_parse_value;
}
/**
* _gtk_css_style_property_get_n_properties:
*
* Gets the number of style properties. This number can increase when new
* theme engines are loaded. Shorthand properties are not included here.
*
* Returns: The number of style properties.
**/
guint
_gtk_css_style_property_get_n_properties (void)
{
if (G_UNLIKELY (gtk_css_style_property_class == NULL))
{
_gtk_style_property_init_properties ();
g_assert (gtk_css_style_property_class);
}
return gtk_css_style_property_class->style_properties->len;
}
/**
* _gtk_css_style_property_lookup_by_id:
* @id: the id of the property
*
* Gets the style property with the given id. All style properties (but not
* shorthand properties) are indexable by id so that it's easy to use arrays
* when doing style lookups.
*
* Returns: (transfer none): The style property with the given id
**/
GtkCssStyleProperty *
_gtk_css_style_property_lookup_by_id (guint id)
{
if (G_UNLIKELY (gtk_css_style_property_class == NULL))
{
_gtk_style_property_init_properties ();
g_assert (gtk_css_style_property_class);
}
g_return_val_if_fail (id < gtk_css_style_property_class->style_properties->len, NULL);
return g_ptr_array_index (gtk_css_style_property_class->style_properties, id);
}
/**
* _gtk_css_style_property_is_inherit:
* @property: the property
*
* Queries if the given @property is inherited. See
* <ulink url="http://www.w3.org/TR/css3-cascade/#inheritance>
* the CSS documentation</ulink> for an explanation of this concept.
*
* Returns: %TRUE if the property is inherited by default.
**/
gboolean
_gtk_css_style_property_is_inherit (GtkCssStyleProperty *property)
{
g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), FALSE);
return property->inherit;
}
/**
* _gtk_css_style_property_is_animated:
* @property: the property
*
* Queries if the given @property can be is animated. See
* <ulink url="http://www.w3.org/TR/css3-transitions/#animatable-css>
* the CSS documentation</ulink> for animatable properties.
*
* Returns: %TRUE if the property can be animated.
**/
gboolean
_gtk_css_style_property_is_animated (GtkCssStyleProperty *property)
{
g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), FALSE);
return property->animated;
}
/**
* _gtk_css_style_property_affects_size:
* @property: the property
*
* Queries if the given @property affects the size of elements. This is
* used for optimizations inside GTK, where a gtk_widget_queue_resize()
* can be avoided if the property does not affect size.
*
* Returns: %TRUE if the property affects sizing of elements.
**/
gboolean
_gtk_css_style_property_affects_size (GtkCssStyleProperty *property)
{
g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), FALSE);
return property->affects_size;
}
/**
* _gtk_css_style_property_affects_font:
* @property: the property
*
* Queries if the given @property affects the default font. This is
* used for optimizations inside GTK, where clearing pango
* layouts can be avoided if the font doesn't change.
*
* Returns: %TRUE if the property affects the font.
**/
gboolean
_gtk_css_style_property_affects_font (GtkCssStyleProperty *property)
{
g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), FALSE);
return property->affects_font;
}
/**
* _gtk_css_style_property_get_id:
* @property: the property
*
* Gets the id for the given property. IDs are used to allow using arrays
* for style lookups.
*
* Returns: The id of the property
**/
guint
_gtk_css_style_property_get_id (GtkCssStyleProperty *property)
{
g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), 0);
return property->id;
}
/**
* _gtk_css_style_property_get_initial_value:
* @property: the property
*
* Queries the initial value of the given @property. See
* <ulink url="http://www.w3.org/TR/css3-cascade/#intial>
* the CSS documentation</ulink> for an explanation of this concept.
*
* Returns: a reference to the initial value. The value will never change.
**/
GtkCssValue *
_gtk_css_style_property_get_initial_value (GtkCssStyleProperty *property)
{
g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), NULL);
return property->initial_value;
}
gboolean
_gtk_css_style_property_changes_affect_size (const GtkBitmask *changes)
{
return _gtk_bitmask_intersects (changes, _properties_affecting_size);
}
gboolean
_gtk_css_style_property_changes_affect_font (const GtkBitmask *changes)
{
return _gtk_bitmask_intersects (changes, _properties_affecting_font);
}