forked from AuroraMiddleware/gtk
338 lines
10 KiB
C
338 lines
10 KiB
C
/*
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* Copyright © 2011 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkcsscustompropertyprivate.h"
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#include <string.h>
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#include "gtkcssstylefuncsprivate.h"
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#include "gtkcsstypedvalueprivate.h"
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#include "gtkstylepropertiesprivate.h"
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#include "gtkthemingengine.h"
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#include "deprecated/gtksymboliccolor.h"
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G_DEFINE_TYPE (GtkCssCustomProperty, _gtk_css_custom_property, GTK_TYPE_CSS_STYLE_PROPERTY)
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static GType
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gtk_css_custom_property_get_specified_type (GParamSpec *pspec)
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{
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
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if (pspec->value_type == GDK_TYPE_RGBA ||
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pspec->value_type == GDK_TYPE_COLOR)
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return GTK_TYPE_SYMBOLIC_COLOR;
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else
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return pspec->value_type;
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G_GNUC_END_IGNORE_DEPRECATIONS;
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}
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static GtkCssValue *
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gtk_css_custom_property_parse_value (GtkStyleProperty *property,
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GtkCssParser *parser)
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{
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GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
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GValue value = G_VALUE_INIT;
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gboolean success;
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if (custom->property_parse_func)
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{
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GError *error = NULL;
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char *value_str;
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g_value_init (&value, _gtk_style_property_get_value_type (property));
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value_str = _gtk_css_parser_read_value (parser);
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if (value_str != NULL)
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{
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success = (* custom->property_parse_func) (value_str, &value, &error);
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g_free (value_str);
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}
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else
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success = FALSE;
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}
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else
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{
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g_value_init (&value, gtk_css_custom_property_get_specified_type (custom->pspec));
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success = _gtk_css_style_parse_value (&value, parser);
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}
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if (!success)
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{
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g_value_unset (&value);
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return NULL;
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}
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return _gtk_css_typed_value_new_take (&value);
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}
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static void
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gtk_css_custom_property_query (GtkStyleProperty *property,
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GValue *value,
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GtkStyleQueryFunc query_func,
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gpointer query_data)
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{
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GtkCssStyleProperty *style = GTK_CSS_STYLE_PROPERTY (property);
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GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (property);
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GtkCssValue *css_value;
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css_value = (* query_func) (_gtk_css_style_property_get_id (style), query_data);
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if (css_value == NULL)
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css_value = _gtk_css_style_property_get_initial_value (style);
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g_value_init (value, custom->pspec->value_type);
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g_value_copy (_gtk_css_typed_value_get (css_value), value);
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}
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static void
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gtk_css_custom_property_assign (GtkStyleProperty *property,
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GtkStyleProperties *props,
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GtkStateFlags state,
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const GValue *value)
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{
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GtkCssValue *css_value = _gtk_css_typed_value_new (value);
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_gtk_style_properties_set_property_by_property (props,
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GTK_CSS_STYLE_PROPERTY (property),
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state,
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css_value);
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_gtk_css_value_unref (css_value);
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}
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static void
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_gtk_css_custom_property_class_init (GtkCssCustomPropertyClass *klass)
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{
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GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
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property_class->parse_value = gtk_css_custom_property_parse_value;
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property_class->query = gtk_css_custom_property_query;
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property_class->assign = gtk_css_custom_property_assign;
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}
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static void
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_gtk_css_custom_property_init (GtkCssCustomProperty *custom)
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{
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}
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static GtkCssValue *
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gtk_css_custom_property_create_initial_value (GParamSpec *pspec)
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{
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GValue value = G_VALUE_INIT;
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GtkCssValue *result;
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g_value_init (&value, pspec->value_type);
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if (pspec->value_type == GTK_TYPE_THEMING_ENGINE)
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g_value_set_object (&value, gtk_theming_engine_load (NULL));
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else if (pspec->value_type == PANGO_TYPE_FONT_DESCRIPTION)
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g_value_take_boxed (&value, pango_font_description_from_string ("Sans 10"));
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else if (pspec->value_type == GDK_TYPE_RGBA)
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{
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GdkRGBA color;
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gdk_rgba_parse (&color, "pink");
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g_value_set_boxed (&value, &color);
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}
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else if (pspec->value_type == GDK_TYPE_COLOR)
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{
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GdkColor color;
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gdk_color_parse ("pink", &color);
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g_value_set_boxed (&value, &color);
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}
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else if (pspec->value_type == GTK_TYPE_BORDER)
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{
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g_value_take_boxed (&value, gtk_border_new ());
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}
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else
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g_param_value_set_default (pspec, &value);
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result = _gtk_css_typed_value_new (&value);
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g_value_unset (&value);
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return result;
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}
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/* Property registration functions */
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/**
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* gtk_theming_engine_register_property: (skip)
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* @name_space: namespace for the property name
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* @parse_func: parsing function to use, or %NULL
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* @pspec: the #GParamSpec for the new property
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*
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* Registers a property so it can be used in the CSS file format,
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* on the CSS file the property will look like
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* "-${@name_space}-${property_name}". being
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* ${property_name} the given to @pspec. @name_space will usually
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* be the theme engine name.
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*
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* For any type a @parse_func may be provided, being this function
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* used for turning any property value (between ':' and ';') in
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* CSS to the #GValue needed. For basic types there is already
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* builtin parsing support, so %NULL may be provided for these
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* cases.
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*
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* Engines must ensure property registration happens exactly once,
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* usually GTK+ deals with theming engines as singletons, so this
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* should be guaranteed to happen once, but bear this in mind
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* when creating #GtkThemeEngine<!-- -->s yourself.
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*
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* In order to make use of the custom registered properties in
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* the CSS file, make sure the engine is loaded first by specifying
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* the engine property, either in a previous rule or within the same
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* one.
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* |[
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* * {
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* engine: someengine;
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* -SomeEngine-custom-property: 2;
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* }
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* ]|
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*
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* Since: 3.0
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*
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* Deprecated: 3.8: Code should use the default properties provided by CSS.
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**/
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void
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gtk_theming_engine_register_property (const gchar *name_space,
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GtkStylePropertyParser parse_func,
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GParamSpec *pspec)
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{
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GtkCssCustomProperty *node;
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GtkCssValue *initial;
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gchar *name;
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g_return_if_fail (name_space != NULL);
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g_return_if_fail (strchr (name_space, ' ') == NULL);
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g_return_if_fail (G_IS_PARAM_SPEC (pspec));
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name = g_strdup_printf ("-%s-%s", name_space, pspec->name);
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/* This also initializes the default properties */
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if (_gtk_style_property_lookup (pspec->name))
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{
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g_warning ("a property with name '%s' already exists", name);
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g_free (name);
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return;
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}
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initial = gtk_css_custom_property_create_initial_value (pspec);
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node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
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"initial-value", initial,
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"name", name,
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"value-type", pspec->value_type,
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NULL);
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node->pspec = pspec;
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node->property_parse_func = parse_func;
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_gtk_css_value_unref (initial);
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g_free (name);
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}
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/**
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* gtk_style_properties_register_property: (skip)
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* @parse_func: parsing function to use, or %NULL
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* @pspec: the #GParamSpec for the new property
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*
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* Registers a property so it can be used in the CSS file format.
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* This function is the low-level equivalent of
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* gtk_theming_engine_register_property(), if you are implementing
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* a theming engine, you want to use that function instead.
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*
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* Since: 3.0
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*
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* Deprecated: 3.8: Code should use the default properties provided by CSS.
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**/
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void
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gtk_style_properties_register_property (GtkStylePropertyParser parse_func,
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GParamSpec *pspec)
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{
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GtkCssCustomProperty *node;
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GtkCssValue *initial;
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g_return_if_fail (G_IS_PARAM_SPEC (pspec));
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/* This also initializes the default properties */
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if (_gtk_style_property_lookup (pspec->name))
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{
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g_warning ("a property with name '%s' already exists", pspec->name);
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return;
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}
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initial = gtk_css_custom_property_create_initial_value (pspec);
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node = g_object_new (GTK_TYPE_CSS_CUSTOM_PROPERTY,
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"initial-value", initial,
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"name", pspec->name,
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"value-type", pspec->value_type,
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NULL);
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node->pspec = pspec;
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node->property_parse_func = parse_func;
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_gtk_css_value_unref (initial);
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}
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/**
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* gtk_style_properties_lookup_property: (skip)
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* @property_name: property name to look up
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* @parse_func: (out): return location for the parse function
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* @pspec: (out) (transfer none): return location for the #GParamSpec
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*
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* Returns %TRUE if a property has been registered, if @pspec or
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* @parse_func are not %NULL, the #GParamSpec and parsing function
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* will be respectively returned.
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*
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* Returns: %TRUE if the property is registered, %FALSE otherwise
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*
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* Since: 3.0
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*
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* Deprecated: 3.8: This code could only look up custom properties and
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* those are deprecated.
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**/
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gboolean
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gtk_style_properties_lookup_property (const gchar *property_name,
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GtkStylePropertyParser *parse_func,
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GParamSpec **pspec)
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{
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GtkStyleProperty *node;
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gboolean found = FALSE;
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g_return_val_if_fail (property_name != NULL, FALSE);
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node = _gtk_style_property_lookup (property_name);
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if (GTK_IS_CSS_CUSTOM_PROPERTY (node))
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{
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GtkCssCustomProperty *custom = GTK_CSS_CUSTOM_PROPERTY (node);
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if (pspec)
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*pspec = custom->pspec;
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if (parse_func)
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*parse_func = custom->property_parse_func;
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found = TRUE;
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}
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return found;
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}
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