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gtk2/gtk/gtkstyleproperties.c
Benjamin Otte c1dc3e9372 css: Refactor code to do property lookups earlier 
We want to ook up the property in the CSS parser, so we can do fancy
things with it. We currently don't but we want to later.
2011-05-18 22:17:57 +02:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gtkstyleproperties.h"
#include <stdlib.h>
#include <gobject/gvaluecollector.h>
#include <cairo-gobject.h>
#include "gtktypebuiltins.h"
#include "gtkstyleprovider.h"
#include "gtksymboliccolor.h"
#include "gtkprivate.h"
#include "gtkthemingengine.h"
#include "gtkanimationdescription.h"
#include "gtkborder.h"
#include "gtkgradient.h"
#include "gtk9slice.h"
#include "gtkintl.h"
/**
* SECTION:gtkstyleproperties
* @Short_description: Store for style property information
* @Title: GtkStyleProperties
*
* GtkStyleProperties provides the storage for style information
* that is used by #GtkStyleContext and other #GtkStyleProvider
* implementations.
*
* Before style properties can be stored in GtkStyleProperties, they
* must be registered with gtk_style_properties_register_property().
*
* Unless you are writing a #GtkStyleProvider implementation, you
* are unlikely to use this API directly, as gtk_style_context_get()
* and its variants are the preferred way to access styling information
* from widget implementations and theming engine implementations
* should use the APIs provided by #GtkThemingEngine instead.
*/
typedef struct GtkStylePropertiesPrivate GtkStylePropertiesPrivate;
typedef struct PropertyData PropertyData;
typedef struct PropertyNode PropertyNode;
typedef struct ValueData ValueData;
struct PropertyNode
{
GParamSpec *pspec;
GtkStylePropertyParser parse_func;
};
struct ValueData
{
GtkStateFlags state;
GValue value;
};
struct PropertyData
{
GArray *values;
};
struct GtkStylePropertiesPrivate
{
GHashTable *color_map;
GHashTable *properties;
};
static GHashTable *properties = NULL;
static void gtk_style_properties_provider_init (GtkStyleProviderIface *iface);
static void gtk_style_properties_finalize (GObject *object);
G_DEFINE_TYPE_EXTENDED (GtkStyleProperties, gtk_style_properties, G_TYPE_OBJECT, 0,
G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER,
gtk_style_properties_provider_init));
static void
gtk_style_properties_class_init (GtkStylePropertiesClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
object_class->finalize = gtk_style_properties_finalize;
/* Initialize default property set */
pspec = g_param_spec_boxed ("color",
"Foreground color",
"Foreground color",
GDK_TYPE_RGBA, 0);
gtk_style_param_set_inherit (pspec, TRUE);
gtk_style_properties_register_property (NULL, pspec);
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("background-color",
"Background color",
"Background color",
GDK_TYPE_RGBA, 0));
pspec = g_param_spec_boxed ("font",
"Font Description",
"Font Description",
PANGO_TYPE_FONT_DESCRIPTION, 0);
gtk_style_param_set_inherit (pspec, TRUE);
gtk_style_properties_register_property (NULL, pspec);
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("margin",
"Margin",
"Margin",
GTK_TYPE_BORDER, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("padding",
"Padding",
"Padding",
GTK_TYPE_BORDER, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("border-width",
"Border width",
"Border width, in pixels",
GTK_TYPE_BORDER, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_int ("border-radius",
"Border radius",
"Border radius, in pixels",
0, G_MAXINT, 0, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_enum ("border-style",
"Border style",
"Border style",
GTK_TYPE_BORDER_STYLE,
GTK_BORDER_STYLE_NONE, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("border-color",
"Border color",
"Border color",
GDK_TYPE_RGBA, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("background-image",
"Background Image",
"Background Image",
CAIRO_GOBJECT_TYPE_PATTERN, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("border-image",
"Border Image",
"Border Image",
GTK_TYPE_9SLICE, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_object ("engine",
"Theming Engine",
"Theming Engine",
GTK_TYPE_THEMING_ENGINE, 0));
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("transition",
"Transition animation description",
"Transition animation description",
GTK_TYPE_ANIMATION_DESCRIPTION, 0));
/* Private property holding the binding sets */
gtk_style_properties_register_property (NULL,
g_param_spec_boxed ("gtk-key-bindings",
"Key bindings",
"Key bindings",
G_TYPE_PTR_ARRAY, 0));
g_type_class_add_private (object_class, sizeof (GtkStylePropertiesPrivate));
}
static PropertyData *
property_data_new (void)
{
PropertyData *data;
data = g_slice_new0 (PropertyData);
data->values = g_array_new (FALSE, FALSE, sizeof (ValueData));
return data;
}
static void
property_data_remove_values (PropertyData *data)
{
guint i;
for (i = 0; i < data->values->len; i++)
{
ValueData *value_data;
value_data = &g_array_index (data->values, ValueData, i);
if (G_IS_VALUE (&value_data->value))
g_value_unset (&value_data->value);
}
if (data->values->len > 0)
g_array_remove_range (data->values, 0, data->values->len);
}
static void
property_data_free (PropertyData *data)
{
property_data_remove_values (data);
g_array_free (data->values, TRUE);
g_slice_free (PropertyData, data);
}
static gboolean
property_data_find_position (PropertyData *data,
GtkStateFlags state,
guint *pos)
{
gint min, max, mid;
gboolean found = FALSE;
guint position;
if (pos)
*pos = 0;
if (data->values->len == 0)
return FALSE;
/* Find position for the given state, or the position where
* it would be if not found, the array is ordered by the
* state flags.
*/
min = 0;
max = data->values->len - 1;
do
{
ValueData *value_data;
mid = (min + max) / 2;
value_data = &g_array_index (data->values, ValueData, mid);
if (value_data->state == state)
{
found = TRUE;
position = mid;
}
else if (value_data->state < state)
position = min = mid + 1;
else
{
max = mid - 1;
position = mid;
}
}
while (!found && min <= max);
if (pos)
*pos = position;
return found;
}
static GValue *
property_data_get_value (PropertyData *data,
GtkStateFlags state)
{
ValueData *val_data;
guint pos;
if (!property_data_find_position (data, state, &pos))
{
ValueData new = { 0 };
new.state = state;
g_array_insert_val (data->values, pos, new);
}
val_data = &g_array_index (data->values, ValueData, pos);
return &val_data->value;
}
static GValue *
property_data_match_state (PropertyData *data,
GtkStateFlags state)
{
guint pos;
gint i;
if (property_data_find_position (data, state, &pos))
{
ValueData *val_data;
/* Exact match */
val_data = &g_array_index (data->values, ValueData, pos);
return &val_data->value;
}
if (pos >= data->values->len)
pos = data->values->len - 1;
/* No exact match, go downwards the list to find
* the closest match to the given state flags, as
* a side effect, there is an implicit precedence
* of higher flags over the smaller ones.
*/
for (i = pos; i >= 0; i--)
{
ValueData *val_data;
val_data = &g_array_index (data->values, ValueData, i);
/* Check whether any of the requested
* flags are set, and no other flags are.
*
* Also, no flags acts as a wildcard, such
* value should be always in the first position
* in the array (if present) anyways.
*/
if (val_data->state == 0 ||
((val_data->state & state) != 0 &&
(val_data->state & ~state) == 0))
return &val_data->value;
}
return NULL;
}
static void
gtk_style_properties_init (GtkStyleProperties *props)
{
GtkStylePropertiesPrivate *priv;
priv = props->priv = G_TYPE_INSTANCE_GET_PRIVATE (props,
GTK_TYPE_STYLE_PROPERTIES,
GtkStylePropertiesPrivate);
priv->properties = g_hash_table_new_full (NULL, NULL, NULL,
(GDestroyNotify) property_data_free);
}
static void
gtk_style_properties_finalize (GObject *object)
{
GtkStylePropertiesPrivate *priv;
GtkStyleProperties *props;
props = GTK_STYLE_PROPERTIES (object);
priv = props->priv;
g_hash_table_destroy (priv->properties);
if (priv->color_map)
g_hash_table_destroy (priv->color_map);
G_OBJECT_CLASS (gtk_style_properties_parent_class)->finalize (object);
}
GtkStyleProperties *
gtk_style_properties_get_style (GtkStyleProvider *provider,
GtkWidgetPath *path)
{
/* Return style set itself */
return g_object_ref (provider);
}
static void
gtk_style_properties_provider_init (GtkStyleProviderIface *iface)
{
iface->get_style = gtk_style_properties_get_style;
}
static PropertyNode *
property_node_lookup (const char *name)
{
if (!properties)
return NULL;
return g_hash_table_lookup (properties, name);
}
/* Property registration functions */
/**
* gtk_style_properties_register_property: (skip)
* @parse_func: parsing function to use, or %NULL
* @pspec: the #GParamSpec for the new property
*
* Registers a property so it can be used in the CSS file format.
* This function is the low-level equivalent of
* gtk_theming_engine_register_property(), if you are implementing
* a theming engine, you want to use that function instead.
*
* Since: 3.0
**/
void
gtk_style_properties_register_property (GtkStylePropertyParser parse_func,
GParamSpec *pspec)
{
PropertyNode *node;
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
/* stuff is never freed, so no need for free functions */
if (G_UNLIKELY (!properties))
properties = g_hash_table_new (g_str_hash, g_str_equal);
if ((node = property_node_lookup (pspec->name)) != NULL)
{
g_warning ("Property \"%s\" was already registered with type %s",
pspec->name, g_type_name (node->pspec->value_type));
return;
}
node = g_slice_new0 (PropertyNode);
node->pspec = pspec;
node->parse_func = parse_func;
g_hash_table_insert (properties, pspec->name, node);
}
/**
* gtk_style_properties_lookup_property: (skip)
* @property_name: property name to look up
* @parse_func: (out): return location for the parse function
* @pspec: (out) (transfer none): return location for the #GParamSpec
*
* Returns %TRUE if a property has been registered, if @pspec or
* @parse_func are not %NULL, the #GParamSpec and parsing function
* will be respectively returned.
*
* Returns: %TRUE if the property is registered, %FALSE otherwise
*
* Since: 3.0
**/
gboolean
gtk_style_properties_lookup_property (const gchar *property_name,
GtkStylePropertyParser *parse_func,
GParamSpec **pspec)
{
PropertyNode *node;
GtkStylePropertiesClass *klass;
gboolean found = FALSE;
g_return_val_if_fail (property_name != NULL, FALSE);
klass = g_type_class_ref (GTK_TYPE_STYLE_PROPERTIES);
node = property_node_lookup (property_name);
if (node)
{
if (pspec)
*pspec = node->pspec;
if (parse_func)
*parse_func = node->parse_func;
found = TRUE;
}
g_type_class_unref (klass);
return found;
}
/* GParamSpec functionality */
enum {
GTK_STYLE_PROPERTY_INHERIT = 1 << G_PARAM_USER_SHIFT
};
/**
* gtk_style_param_set_inherit:
* @pspec: A style param
* @inherit: whether the @pspec value should be inherited
*
* Sets whether a param spec installed with function such as
* gtk_style_properties_register_property() or
* gtk_widget_class_install_style_property() should inherit their
* value from the parent widget if it is not set instead of using
* the default value of @pspec. See the
* <ulink url="http://www.w3.org/TR/CSS21/cascade.html#inheritance">
* CSS specification's description of inheritance</ulink> for a
* longer description of this concept.
*
* By default, param specs do not inherit their value.
**/
void
gtk_style_param_set_inherit (GParamSpec *pspec,
gboolean inherit)
{
if (inherit)
pspec->flags |= GTK_STYLE_PROPERTY_INHERIT;
else
pspec->flags &= ~GTK_STYLE_PROPERTY_INHERIT;
}
/**
* gtk_style_param_get_inherit:
* @pspec: a style param
*
* Checks if the value of this param should be inherited from the parent
* #GtkWidget instead of using the default value when it has not been
* specified. See gtk_style_param_set_inherit() for more details.
*
* Returns: %TRUE if the param should inherit its value
**/
gboolean
gtk_style_param_get_inherit (GParamSpec *pspec)
{
return (pspec->flags & GTK_STYLE_PROPERTY_INHERIT) ? TRUE : FALSE;
}
/* GtkStyleProperties methods */
/**
* gtk_style_properties_new:
*
* Returns a newly created #GtkStyleProperties
*
* Returns: a new #GtkStyleProperties
**/
GtkStyleProperties *
gtk_style_properties_new (void)
{
return g_object_new (GTK_TYPE_STYLE_PROPERTIES, NULL);
}
/**
* gtk_style_properties_map_color:
* @props: a #GtkStyleProperties
* @name: color name
* @color: #GtkSymbolicColor to map @name to
*
* Maps @color so it can be referenced by @name. See
* gtk_style_properties_lookup_color()
*
* Since: 3.0
**/
void
gtk_style_properties_map_color (GtkStyleProperties *props,
const gchar *name,
GtkSymbolicColor *color)
{
GtkStylePropertiesPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
g_return_if_fail (name != NULL);
g_return_if_fail (color != NULL);
priv = props->priv;
if (G_UNLIKELY (!priv->color_map))
priv->color_map = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) gtk_symbolic_color_unref);
g_hash_table_replace (priv->color_map,
g_strdup (name),
gtk_symbolic_color_ref (color));
}
/**
* gtk_style_properties_lookup_color:
* @props: a #GtkStyleProperties
* @name: color name to lookup
*
* Returns the symbolic color that is mapped
* to @name.
*
* Returns: (transfer none): The mapped color
*
* Since: 3.0
**/
GtkSymbolicColor *
gtk_style_properties_lookup_color (GtkStyleProperties *props,
const gchar *name)
{
GtkStylePropertiesPrivate *priv;
g_return_val_if_fail (GTK_IS_STYLE_PROPERTIES (props), NULL);
g_return_val_if_fail (name != NULL, NULL);
priv = props->priv;
if (!priv->color_map)
return NULL;
return g_hash_table_lookup (priv->color_map, name);
}
void
_gtk_style_properties_set_property_by_pspec (GtkStyleProperties *props,
GParamSpec *pspec,
GtkStateFlags state,
const GValue *value)
{
GtkStylePropertiesPrivate *priv;
PropertyData *prop;
GType value_type;
GValue *val;
value_type = G_VALUE_TYPE (value);
if (pspec->value_type == GDK_TYPE_RGBA ||
pspec->value_type == GDK_TYPE_COLOR)
{
/* Allow GtkSymbolicColor as well */
g_return_if_fail (value_type == GDK_TYPE_RGBA ||
value_type == GDK_TYPE_COLOR ||
value_type == GTK_TYPE_SYMBOLIC_COLOR);
}
else if (pspec->value_type == CAIRO_GOBJECT_TYPE_PATTERN)
{
/* Allow GtkGradient as a substitute */
g_return_if_fail (value_type == CAIRO_GOBJECT_TYPE_PATTERN ||
value_type == GTK_TYPE_GRADIENT);
}
else
g_return_if_fail (pspec->value_type == value_type);
priv = props->priv;
prop = g_hash_table_lookup (priv->properties, pspec);
if (!prop)
{
prop = property_data_new ();
g_hash_table_insert (priv->properties, pspec, prop);
}
val = property_data_get_value (prop, state);
if (G_VALUE_TYPE (val) == value_type)
g_value_reset (val);
else
{
if (G_IS_VALUE (val))
g_value_unset (val);
g_value_init (val, value_type);
}
g_value_copy (value, val);
}
/**
* gtk_style_properties_set_property:
* @props: a #GtkStyleProperties
* @property: styling property to set
* @state: state to set the value for
* @value: new value for the property
*
* Sets a styling property in @props.
*
* Since: 3.0
**/
void
gtk_style_properties_set_property (GtkStyleProperties *props,
const gchar *property,
GtkStateFlags state,
const GValue *value)
{
PropertyNode *node;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
node = property_node_lookup (property);
if (!node)
{
g_warning ("Style property \"%s\" is not registered", property);
return;
}
_gtk_style_properties_set_property_by_pspec (props,
node->pspec,
state,
value);
}
/**
* gtk_style_properties_set_valist:
* @props: a #GtkStyleProperties
* @state: state to set the values for
* @args: va_list of property name/value pairs, followed by %NULL
*
* Sets several style properties on @props.
*
* Since: 3.0
**/
void
gtk_style_properties_set_valist (GtkStyleProperties *props,
GtkStateFlags state,
va_list args)
{
GtkStylePropertiesPrivate *priv;
const gchar *property_name;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
priv = props->priv;
property_name = va_arg (args, const gchar *);
while (property_name)
{
PropertyNode *node;
PropertyData *prop;
gchar *error = NULL;
GValue *val;
node = property_node_lookup (property_name);
if (!node)
{
g_warning ("Style property \"%s\" is not registered", property_name);
break;
}
prop = g_hash_table_lookup (priv->properties, node->pspec);
if (!prop)
{
prop = property_data_new ();
g_hash_table_insert (priv->properties, node->pspec, prop);
}
val = property_data_get_value (prop, state);
if (G_IS_VALUE (val))
g_value_unset (val);
G_VALUE_COLLECT_INIT (val, node->pspec->value_type,
args, 0, &error);
if (error)
{
g_warning ("Could not set style property \"%s\": %s", property_name, error);
g_value_unset (val);
g_free (error);
break;
}
property_name = va_arg (args, const gchar *);
}
}
/**
* gtk_style_properties_set:
* @props: a #GtkStyleProperties
* @state: state to set the values for
* @...: property name/value pairs, followed by %NULL
*
* Sets several style properties on @props.
*
* Since: 3.0
**/
void
gtk_style_properties_set (GtkStyleProperties *props,
GtkStateFlags state,
...)
{
va_list args;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
va_start (args, state);
gtk_style_properties_set_valist (props, state, args);
va_end (args);
}
static gboolean
resolve_color (GtkStyleProperties *props,
GValue *value)
{
GdkRGBA color;
/* Resolve symbolic color to GdkRGBA */
if (!gtk_symbolic_color_resolve (g_value_get_boxed (value), props, &color))
return FALSE;
/* Store it back, this is where GdkRGBA caching happens */
g_value_unset (value);
g_value_init (value, GDK_TYPE_RGBA);
g_value_set_boxed (value, &color);
return TRUE;
}
static gboolean
resolve_color_rgb (GtkStyleProperties *props,
GValue *value)
{
GdkColor color = { 0 };
GdkRGBA rgba;
if (!gtk_symbolic_color_resolve (g_value_get_boxed (value), props, &rgba))
return FALSE;
color.red = rgba.red * 65535. + 0.5;
color.green = rgba.green * 65535. + 0.5;
color.blue = rgba.blue * 65535. + 0.5;
g_value_unset (value);
g_value_init (value, GDK_TYPE_COLOR);
g_value_set_boxed (value, &color);
return TRUE;
}
static gboolean
resolve_gradient (GtkStyleProperties *props,
GValue *value)
{
cairo_pattern_t *gradient;
if (!gtk_gradient_resolve (g_value_get_boxed (value), props, &gradient))
return FALSE;
/* Store it back, this is where cairo_pattern_t caching happens */
g_value_unset (value);
g_value_init (value, CAIRO_GOBJECT_TYPE_PATTERN);
g_value_take_boxed (value, gradient);
return TRUE;
}
static gboolean
style_properties_resolve_type (GtkStyleProperties *props,
PropertyNode *node,
GValue *val)
{
if (val && G_VALUE_TYPE (val) == GTK_TYPE_SYMBOLIC_COLOR)
{
if (node->pspec->value_type == GDK_TYPE_RGBA)
{
if (!resolve_color (props, val))
return FALSE;
}
else if (node->pspec->value_type == GDK_TYPE_COLOR)
{
if (!resolve_color_rgb (props, val))
return FALSE;
}
else
return FALSE;
}
else if (val && G_VALUE_TYPE (val) == GTK_TYPE_GRADIENT)
{
g_return_val_if_fail (node->pspec->value_type == CAIRO_GOBJECT_TYPE_PATTERN, FALSE);
if (!resolve_gradient (props, val))
return FALSE;
}
return TRUE;
}
static void
lookup_default_value (PropertyNode *node,
GValue *value)
{
if (node->pspec->value_type == GTK_TYPE_THEMING_ENGINE)
g_value_set_object (value, gtk_theming_engine_load (NULL));
else if (node->pspec->value_type == PANGO_TYPE_FONT_DESCRIPTION)
g_value_take_boxed (value, pango_font_description_from_string ("Sans 10"));
else if (node->pspec->value_type == GDK_TYPE_RGBA)
{
GdkRGBA color;
gdk_rgba_parse (&color, "pink");
g_value_set_boxed (value, &color);
}
else if (node->pspec->value_type == GTK_TYPE_BORDER)
{
g_value_take_boxed (value, gtk_border_new ());
}
else
g_param_value_set_default (node->pspec, value);
}
const GValue *
_gtk_style_properties_peek_property (GtkStyleProperties *props,
const gchar *prop_name,
GtkStateFlags state)
{
GtkStylePropertiesPrivate *priv;
PropertyNode *node;
PropertyData *prop;
GValue *val;
g_return_val_if_fail (GTK_IS_STYLE_PROPERTIES (props), NULL);
g_return_val_if_fail (prop_name != NULL, NULL);
node = property_node_lookup (prop_name);
if (!node)
{
g_warning ("Style property \"%s\" is not registered", prop_name);
return NULL;
}
priv = props->priv;
prop = g_hash_table_lookup (priv->properties, node->pspec);
if (!prop)
return NULL;
val = property_data_match_state (prop, state);
if (val &&
!style_properties_resolve_type (props, node, val))
return NULL;
return val;
}
/**
* gtk_style_properties_get_property:
* @props: a #GtkStyleProperties
* @property: style property name
* @state: state to retrieve the property value for
* @value: (out) (transfer full): return location for the style property value.
*
* Gets a style property from @props for the given state. When done with @value,
* g_value_unset() needs to be called to free any allocated memory.
*
* Returns: %TRUE if the property exists in @props, %FALSE otherwise
*
* Since: 3.0
**/
gboolean
gtk_style_properties_get_property (GtkStyleProperties *props,
const gchar *property,
GtkStateFlags state,
GValue *value)
{
GtkStylePropertiesPrivate *priv;
PropertyNode *node;
PropertyData *prop;
GValue *val;
g_return_val_if_fail (GTK_IS_STYLE_PROPERTIES (props), FALSE);
g_return_val_if_fail (property != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
node = property_node_lookup (property);
if (!node)
{
g_warning ("Style property \"%s\" is not registered", property);
return FALSE;
}
priv = props->priv;
prop = g_hash_table_lookup (priv->properties, node->pspec);
if (!prop)
return FALSE;
g_value_init (value, node->pspec->value_type);
val = property_data_match_state (prop, state);
if (val &&
!style_properties_resolve_type (props, node, val))
return FALSE;
if (val)
{
g_param_value_validate (node->pspec, val);
g_value_copy (val, value);
}
else
lookup_default_value (node, value);
return TRUE;
}
/**
* gtk_style_properties_get_valist:
* @props: a #GtkStyleProperties
* @state: state to retrieve the property values for
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several style property values from @props for a given state.
*
* Since: 3.0
**/
void
gtk_style_properties_get_valist (GtkStyleProperties *props,
GtkStateFlags state,
va_list args)
{
GtkStylePropertiesPrivate *priv;
const gchar *property_name;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
priv = props->priv;
property_name = va_arg (args, const gchar *);
while (property_name)
{
PropertyNode *node;
PropertyData *prop;
gchar *error = NULL;
GValue *val = NULL;
node = property_node_lookup (property_name);
if (!node)
{
g_warning ("Style property \"%s\" is not registered", property_name);
break;
}
prop = g_hash_table_lookup (priv->properties, node->pspec);
if (prop)
val = property_data_match_state (prop, state);
if (val &&
!style_properties_resolve_type (props, node, val))
val = NULL;
if (val)
{
g_param_value_validate (node->pspec, val);
G_VALUE_LCOPY (val, args, 0, &error);
}
else
{
GValue default_value = { 0 };
g_value_init (&default_value, node->pspec->value_type);
lookup_default_value (node, &default_value);
G_VALUE_LCOPY (&default_value, args, 0, &error);
g_value_unset (&default_value);
}
if (error)
{
g_warning ("Could not get style property \"%s\": %s", property_name, error);
g_free (error);
break;
}
property_name = va_arg (args, const gchar *);
}
}
/**
* gtk_style_properties_get:
* @props: a #GtkStyleProperties
* @state: state to retrieve the property values for
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several style property values from @props for a
* given state.
*
* Since: 3.0
**/
void
gtk_style_properties_get (GtkStyleProperties *props,
GtkStateFlags state,
...)
{
va_list args;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
va_start (args, state);
gtk_style_properties_get_valist (props, state, args);
va_end (args);
}
/**
* gtk_style_properties_unset_property:
* @props: a #GtkStyleProperties
* @property: property to unset
* @state: state to unset
*
* Unsets a style property in @props.
*
* Since: 3.0
**/
void
gtk_style_properties_unset_property (GtkStyleProperties *props,
const gchar *property,
GtkStateFlags state)
{
GtkStylePropertiesPrivate *priv;
PropertyNode *node;
PropertyData *prop;
guint pos;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
g_return_if_fail (property != NULL);
node = property_node_lookup (property);
if (!node)
{
g_warning ("Style property \"%s\" is not registered", property);
return;
}
priv = props->priv;
prop = g_hash_table_lookup (priv->properties, node->pspec);
if (!prop)
return;
if (property_data_find_position (prop, state, &pos))
{
ValueData *data;
data = &g_array_index (prop->values, ValueData, pos);
if (G_IS_VALUE (&data->value))
g_value_unset (&data->value);
g_array_remove_index (prop->values, pos);
}
}
/**
* gtk_style_properties_clear:
* @props: a #GtkStyleProperties
*
* Clears all style information from @props.
**/
void
gtk_style_properties_clear (GtkStyleProperties *props)
{
GtkStylePropertiesPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
priv = props->priv;
g_hash_table_remove_all (priv->properties);
}
/**
* gtk_style_properties_merge:
* @props: a #GtkStyleProperties
* @props_to_merge: a second #GtkStyleProperties
* @replace: whether to replace values or not
*
* Merges into @props all the style information contained
* in @props_to_merge. If @replace is %TRUE, the values
* will be overwritten, if it is %FALSE, the older values
* will prevail.
*
* Since: 3.0
**/
void
gtk_style_properties_merge (GtkStyleProperties *props,
const GtkStyleProperties *props_to_merge,
gboolean replace)
{
GtkStylePropertiesPrivate *priv, *priv_to_merge;
GHashTableIter iter;
gpointer key, value;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props_to_merge));
priv = props->priv;
priv_to_merge = props_to_merge->priv;
/* Merge symbolic color map */
if (priv_to_merge->color_map)
{
g_hash_table_iter_init (&iter, priv_to_merge->color_map);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const gchar *name;
GtkSymbolicColor *color;
name = key;
color = value;
if (!replace &&
g_hash_table_lookup (priv->color_map, name))
continue;
gtk_style_properties_map_color (props, name, color);
}
}
/* Merge symbolic style properties */
g_hash_table_iter_init (&iter, priv_to_merge->properties);
while (g_hash_table_iter_next (&iter, &key, &value))
{
PropertyData *prop_to_merge = value;
PropertyData *prop;
guint i;
prop = g_hash_table_lookup (priv->properties, key);
if (!prop)
{
prop = property_data_new ();
g_hash_table_insert (priv->properties, key, prop);
}
for (i = 0; i < prop_to_merge->values->len; i++)
{
ValueData *data;
GValue *value;
data = &g_array_index (prop_to_merge->values, ValueData, i);
if (replace && data->state == GTK_STATE_FLAG_NORMAL &&
G_VALUE_TYPE (&data->value) != PANGO_TYPE_FONT_DESCRIPTION)
{
/* Let normal state override all states
* previously set in the original set
*/
property_data_remove_values (prop);
}
value = property_data_get_value (prop, data->state);
if (G_VALUE_TYPE (&data->value) == PANGO_TYPE_FONT_DESCRIPTION &&
G_IS_VALUE (value))
{
PangoFontDescription *font_desc;
PangoFontDescription *font_desc_to_merge;
/* Handle merging of font descriptions */
font_desc = g_value_get_boxed (value);
font_desc_to_merge = g_value_get_boxed (&data->value);
pango_font_description_merge (font_desc, font_desc_to_merge, replace);
}
else if (G_VALUE_TYPE (&data->value) == G_TYPE_PTR_ARRAY &&
G_IS_VALUE (value))
{
GPtrArray *array, *array_to_merge;
gint i;
/* Append the array, mainly thought
* for the gtk-key-bindings property
*/
array = g_value_get_boxed (value);
array_to_merge = g_value_get_boxed (&data->value);
for (i = 0; i < array_to_merge->len; i++)
g_ptr_array_add (array, g_ptr_array_index (array_to_merge, i));
}
else if (replace || !G_IS_VALUE (value))
{
if (!G_IS_VALUE (value))
g_value_init (value, G_VALUE_TYPE (&data->value));
else if (G_VALUE_TYPE (value) != G_VALUE_TYPE (&data->value))
{
g_value_unset (value);
g_value_init (value, G_VALUE_TYPE (&data->value));
}
g_value_copy (&data->value, value);
}
}
}
}
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