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/* GTK - The GIMP Toolkit
* Copyright (C) 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 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssiconthemevalueprivate.h"
#include "gtkicontheme.h"
#include "gtksettingsprivate.h"
#include "gtkstyleproviderprivate.h"
/*
* The idea behind this value (and the '-gtk-icon-theme' CSS property) is
* to track changes to the icon theme.
*
* We create a new instance of this value whenever the icon theme changes
* (via emitting the changed signal). So as long as the icon theme does
* not change, we will compute the same value. We can then compare values
* by pointer to see if the icon theme changed.
*/
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
GtkIconTheme *icontheme;
guint changed_id;
};
static void
gtk_css_value_icon_theme_disconnect_handler (GtkCssValue *value)
{
if (value->changed_id == 0)
return;
g_object_set_data (G_OBJECT (value->icontheme), "-gtk-css-value", NULL);
g_signal_handler_disconnect (value->icontheme, value->changed_id);
value->changed_id = 0;
}
static void
gtk_css_value_icon_theme_changed_cb (GtkIconTheme *icontheme,
GtkCssValue *value)
{
gtk_css_value_icon_theme_disconnect_handler (value);
}
static void
gtk_css_value_icon_theme_free (GtkCssValue *value)
{
gtk_css_value_icon_theme_disconnect_handler (value);
if (value->icontheme)
g_object_unref (value->icontheme);
g_slice_free (GtkCssValue, value);
}
static GtkCssValue *
gtk_css_value_icon_theme_compute (GtkCssValue *icon_theme,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkIconTheme *icontheme;
if (icon_theme->icontheme)
icontheme = icon_theme->icontheme;
else
icontheme = gtk_icon_theme_get_for_screen (_gtk_settings_get_screen (_gtk_style_provider_private_get_settings (provider)));
return gtk_css_icon_theme_value_new (icontheme);
}
static gboolean
gtk_css_value_icon_theme_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
return FALSE;
}
static GtkCssValue *
gtk_css_value_icon_theme_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
return NULL;
}
static void
gtk_css_value_icon_theme_print (const GtkCssValue *icon_theme,
GString *string)
{
g_string_append (string, "initial");
}
static const GtkCssValueClass GTK_CSS_VALUE_ICON_THEME = {
gtk_css_value_icon_theme_free,
gtk_css_value_icon_theme_compute,
gtk_css_value_icon_theme_equal,
gtk_css_value_icon_theme_transition,
gtk_css_value_icon_theme_print
};
static GtkCssValue default_icon_theme_value = { >K_CSS_VALUE_ICON_THEME, 1, NULL, 0 };
GtkCssValue *
gtk_css_icon_theme_value_new (GtkIconTheme *icontheme)
{
GtkCssValue *result;
if (icontheme == NULL)
return _gtk_css_value_ref (&default_icon_theme_value);
result = g_object_get_data (G_OBJECT (icontheme), "-gtk-css-value");
if (result)
return _gtk_css_value_ref (result);
result = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_ICON_THEME);
result->icontheme = g_object_ref (icontheme);
g_object_set_data (G_OBJECT (icontheme), "-gtk-css-value", result);
result->changed_id = g_signal_connect (icontheme, "changed", G_CALLBACK (gtk_css_value_icon_theme_changed_cb), result);
return result;
}
GtkCssValue *
gtk_css_icon_theme_value_parse (GtkCssParser *parser)
{
GtkIconTheme *icontheme;
GtkCssValue *result;
char *s;
s = _gtk_css_parser_read_string (parser);
if (s == NULL)
return NULL;
icontheme = gtk_icon_theme_new ();
gtk_icon_theme_set_custom_theme (icontheme, s);
result = gtk_css_icon_theme_value_new (icontheme);
g_object_unref (icontheme);
g_free (s);
return result;
}
GtkIconTheme *
gtk_css_icon_theme_value_get_icon_theme (GtkCssValue *value)
{
g_return_val_if_fail (value->class == >K_CSS_VALUE_ICON_THEME, NULL);
return value->icontheme;
}
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