gala/lib/WindowIcon.vala
2018-02-14 21:17:31 +01:00

133 lines
3.5 KiB
Vala

//
// Copyright (C) 2012 Tom Beckmann, Rico Tzschichholz
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
namespace Gala
{
/**
* Creates a new ClutterTexture with an icon for the window at the given size.
* This is recommended way to grab an icon for a window as this method will make
* sure the icon is updated if it becomes available at a later point.
*/
public class WindowIcon : Clutter.Texture
{
static Bamf.Matcher matcher;
static construct
{
matcher = Bamf.Matcher.get_default ();
}
public Meta.Window window { get; construct; }
public int icon_size { get; construct; }
public int scale { get; construct; }
/**
* If set to true, the SafeWindowClone will destroy itself when the connected
* window is unmanaged
*/
public bool destroy_on_unmanaged {
get {
return _destroy_on_unmanaged;
}
construct set {
if (_destroy_on_unmanaged == value)
return;
_destroy_on_unmanaged = value;
if (_destroy_on_unmanaged)
window.unmanaged.connect (unmanaged);
else
window.unmanaged.disconnect (unmanaged);
}
}
bool _destroy_on_unmanaged = false;
bool loaded = false;
uint32 xid;
/**
* Creates a new WindowIcon
*
* @param window The window for which to create the icon
* @param icon_size The size of the icon in pixels
* @param scale The desired scale of the icon
* @param destroy_on_unmanaged see destroy_on_unmanaged property
*/
public WindowIcon (Meta.Window window, int icon_size, int scale = 1, bool destroy_on_unmanaged = false)
{
Object (window: window,
icon_size: icon_size,
destroy_on_unmanaged: destroy_on_unmanaged,
scale: scale);
}
construct
{
width = icon_size * scale;
height = icon_size * scale;
xid = (uint32) window.get_xwindow ();
// new windows often reach mutter earlier than bamf, that's why
// we have to wait until the next window opens and hope that it's
// ours so we can get a proper icon instead of the default fallback.
var app = matcher.get_application_for_xid (xid);
if (app == null)
matcher.view_opened.connect (retry_load);
else
loaded = true;
update_texture (true);
}
~WindowIcon ()
{
if (!loaded)
matcher.view_opened.disconnect (retry_load);
}
void retry_load (Bamf.View view)
{
var app = matcher.get_application_for_xid (xid);
// retry only once
loaded = true;
matcher.view_opened.disconnect (retry_load);
if (app == null)
return;
update_texture (false);
}
void update_texture (bool initial)
{
var pixbuf = Gala.Utils.get_icon_for_xid (xid, icon_size, scale, !initial);
try {
set_from_rgb_data (pixbuf.get_pixels (), pixbuf.get_has_alpha (),
pixbuf.get_width (), pixbuf.get_height (),
pixbuf.get_rowstride (), (pixbuf.get_has_alpha () ? 4 : 3), 0);
} catch (Error e) {}
}
void unmanaged (Meta.Window window)
{
destroy ();
}
}
}