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gtk2/gtk/gtkstyleproperties.c

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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 "gtkstylepropertiesprivate.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 "gtkshadowprivate.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 ValueData ValueData;
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);
object_class->finalize = gtk_style_properties_finalize;
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 void
gtk_style_property_init (void)
{
GParamSpec *pspec;
if (G_LIKELY (properties))
return;
/* stuff is never freed, so no need for free functions */
properties = g_hash_table_new (g_str_hash, g_str_equal);
/* note that gtk_style_properties_register_property() calls this function,
* so make sure we're sanely inited to avoid infloops */
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);
pspec = g_param_spec_boxed ("text-shadow",
"Text shadow",
"Text shadow",
GTK_TYPE_SHADOW, 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));
}
const GtkStyleProperty *
_gtk_style_property_lookup (const char *name)
{
gtk_style_property_init ();
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)
{
const GtkStyleProperty *existing;
GtkStyleProperty *node;
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
gtk_style_property_init ();
existing = _gtk_style_property_lookup (pspec->name);
if (existing != NULL)
{
g_warning ("Property \"%s\" was already registered with type %s",
pspec->name, g_type_name (existing->pspec->value_type));
return;
}
node = g_slice_new0 (GtkStyleProperty);
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)
{
const GtkStyleProperty *node;
gboolean found = FALSE;
g_return_val_if_fail (property_name != NULL, FALSE);
node = _gtk_style_property_lookup (property_name);
if (node)
{
if (pspec)
*pspec = node->pspec;
if (parse_func)
*parse_func = node->parse_func;
found = TRUE;
}
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)
{
const GtkStyleProperty *node;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
node = _gtk_style_property_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)
{
const GtkStyleProperty *node;
PropertyData *prop;
gchar *error = NULL;
GValue *val;
node = _gtk_style_property_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
resolve_shadow (GtkStyleProperties *props,
GValue *value)
{
GtkShadow *resolved, *base;
base = g_value_get_boxed (value);
if (base == NULL)
return TRUE;
if (_gtk_shadow_get_resolved (base))
return TRUE;
resolved = _gtk_shadow_resolve (base, props);
if (resolved == NULL)
return FALSE;
g_value_take_boxed (value, resolved);
return TRUE;
}
static gboolean
style_properties_resolve_type (GtkStyleProperties *props,
const GtkStyleProperty *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;
}
else if (val && G_VALUE_TYPE (val) == GTK_TYPE_SHADOW)
{
if (!resolve_shadow (props, val))
return FALSE;
}
return TRUE;
}
static void
lookup_default_value (const GtkStyleProperty *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;
const GtkStyleProperty *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 = _gtk_style_property_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;
const GtkStyleProperty *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 = _gtk_style_property_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)
{
const GtkStyleProperty *node;
PropertyData *prop;
gchar *error = NULL;
GValue *val = NULL;
node = _gtk_style_property_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;
const GtkStyleProperty *node;
PropertyData *prop;
guint pos;
g_return_if_fail (GTK_IS_STYLE_PROPERTIES (props));
g_return_if_fail (property != NULL);
node = _gtk_style_property_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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