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268f3209dc
We need to instance a Gtk.Widget to be able to use `get_style_context`. Thus, we use the singleton pattern to avoid allocating an object every time we call `is_theme_dark()`. Fixes #133.
56 lines
1.4 KiB
Vala
56 lines
1.4 KiB
Vala
/*
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*
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* Copyright (C) 2018 - Jente Hidskes <hjdskes@gmail.com>
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*
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* gitg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* gitg 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gitg. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace Gitg
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{
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public class Theme : Gtk.Widget
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{
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private static GLib.Once<Theme> _instance;
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public static unowned Theme instance ()
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{
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return _instance.once (() => { return new Theme (); });
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}
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public bool is_theme_dark()
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{
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var settings = Gtk.Settings.get_default();
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var theme = Environment.get_variable("GTK_THEME");
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var dark = settings.gtk_application_prefer_dark_theme || (theme != null && theme.has_suffix(":dark"));
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if (!dark) {
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var stylecontext = get_style_context();
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Gdk.RGBA rgba;
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var background_set = stylecontext.lookup_color("theme_bg_color", out rgba);
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if (background_set && rgba.red + rgba.green + rgba.blue < 1.0)
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{
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dark = true;
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}
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}
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return dark;
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}
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}
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}
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// ex:ts=4 noet
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