134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 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 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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#include "config.h"
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#include "gtkcssiconthemevalueprivate.h"
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#include "gtkicontheme.h"
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#include "gtksettingsprivate.h"
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#include "gtkstyleproviderprivate.h"
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/*
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* The idea behind this value (and the '-gtk-icon-theme' CSS property) is
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* to track changes to the icon theme.
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*
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* We create a new instance of this value whenever the icon theme changes
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* (via emitting the changed signal). So as long as the icon theme does
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* not change, we will compute the same value. We can then compare values
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* by pointer to see if the icon theme changed.
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*/
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struct _GtkCssValue {
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GTK_CSS_VALUE_BASE
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GtkIconTheme *icontheme;
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guint changed_id;
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};
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static void
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gtk_css_value_icon_theme_disconnect_handler (GtkCssValue *value)
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{
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if (value->changed_id == 0)
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return;
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g_object_set_data (G_OBJECT (value->icontheme), "-gtk-css-value", NULL);
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g_signal_handler_disconnect (value->icontheme, value->changed_id);
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value->changed_id = 0;
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}
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static void
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gtk_css_value_icon_theme_changed_cb (GtkIconTheme *icontheme,
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GtkCssValue *value)
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{
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gtk_css_value_icon_theme_disconnect_handler (value);
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}
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static void
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gtk_css_value_icon_theme_free (GtkCssValue *value)
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{
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gtk_css_value_icon_theme_disconnect_handler (value);
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if (value->icontheme)
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g_object_unref (value->icontheme);
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g_slice_free (GtkCssValue, value);
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}
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static GtkCssValue *
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gtk_css_value_icon_theme_compute (GtkCssValue *icon_theme,
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guint property_id,
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GtkStyleProviderPrivate *provider,
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GtkCssStyle *style,
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GtkCssStyle *parent_style)
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{
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GtkCssValue *result;
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GtkIconTheme *icontheme;
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icontheme = gtk_icon_theme_get_for_screen (_gtk_settings_get_screen (_gtk_style_provider_private_get_settings (provider)));
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result = g_object_get_data (G_OBJECT (icontheme), "-gtk-css-value");
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if (result)
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return _gtk_css_value_ref (result);
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result = _gtk_css_icon_theme_value_new ();
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result->icontheme = g_object_ref (icontheme);
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g_object_set_data (G_OBJECT (icontheme), "-gtk-css-value", result);
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result->changed_id = g_signal_connect (icontheme, "changed", G_CALLBACK (gtk_css_value_icon_theme_changed_cb), result);
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return result;
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}
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static gboolean
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gtk_css_value_icon_theme_equal (const GtkCssValue *value1,
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const GtkCssValue *value2)
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{
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return FALSE;
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}
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static GtkCssValue *
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gtk_css_value_icon_theme_transition (GtkCssValue *start,
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GtkCssValue *end,
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guint property_id,
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double progress)
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{
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return NULL;
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}
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static void
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gtk_css_value_icon_theme_print (const GtkCssValue *icon_theme,
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GString *string)
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{
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g_string_append (string, "initial");
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}
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static const GtkCssValueClass GTK_CSS_VALUE_ICON_THEME = {
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gtk_css_value_icon_theme_free,
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gtk_css_value_icon_theme_compute,
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gtk_css_value_icon_theme_equal,
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gtk_css_value_icon_theme_transition,
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gtk_css_value_icon_theme_print
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};
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GtkCssValue *
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_gtk_css_icon_theme_value_new (void)
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{
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return _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_ICON_THEME);
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}
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