gala/lib/AppSystem.vala

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/*
* Copyright 2021 elementary, Inc. <https://elementary.io>
* Copyright 2021 Corentin Noël <tintou@noel.tf>
* SPDX-License-Identifier: GPL-3.0-or-later
*/
public class Gala.AppSystem : GLib.Object {
private static GLib.Once<AppSystem> instance;
public static unowned AppSystem get_default () {
return instance.once (() => new AppSystem ());
}
private GLib.HashTable<Gala.App, unowned Gala.App> running_apps;
private GLib.HashTable<unowned string, Gala.App> id_to_app;
private GLib.HashTable<string, string> startup_wm_class_to_id;
private Gala.AppCache app_cache;
construct {
id_to_app = new GLib.HashTable<unowned string, Gala.App> (str_hash, str_equal);
startup_wm_class_to_id = new GLib.HashTable<string, string> (str_hash, str_equal);
running_apps = new GLib.HashTable<Gala.App, unowned Gala.App> (null, null);
app_cache = new AppCache ();
}
public unowned Gala.App? lookup_app (string id) {
unowned Gala.App? app = id_to_app.lookup (id);
if (app != null) {
return app;
}
GLib.DesktopAppInfo? info = app_cache.lookup_id (id);
if (info == null) {
return null;
}
var owned_app = new Gala.App (info);
app = owned_app;
id_to_app.insert (owned_app.id, (owned) owned_app);
return app;
}
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public unowned Gala.App? lookup_startup_wmclass (string? wmclass) {
if (wmclass == null) {
return null;
}
GLib.DesktopAppInfo? info = app_cache.lookup_startup_wmclass (wmclass);
if (info == null) {
return null;
}
return lookup_app (info.get_id ());
}
private unowned Gala.App? lookup_heuristic_basename (string name) {
/* Vendor prefixes are something that can be preprended to a .desktop
* file name.
*/
const string[] VENDOR_PREFIXES = {
"gnome-",
"fedora-",
"mozilla-",
"debian-",
};
unowned Gala.App? result = lookup_app (name);
if (result != null) {
return result;
}
foreach (unowned string prefix in VENDOR_PREFIXES) {
result = lookup_app (prefix.concat (name));
if (result != null) {
return result;
}
}
return null;
}
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public unowned Gala.App? lookup_desktop_wmclass (string? wmclass) {
if (wmclass == null) {
return null;
}
/* First try without changing the case (this handles
org.example.Foo.Bar.desktop applications)
Note that is slightly wrong in that Gtk+ would set
the WM_CLASS to Org.example.Foo.Bar, but it also
sets the instance part to org.example.Foo.Bar, so we're ok
*/
var desktop_file = wmclass.concat (".desktop");
unowned Gala.App? app = lookup_heuristic_basename (desktop_file);
if (app != null) {
return app;
}
/* This handles "Fedora Eclipse", probably others.
* Note _strdelimit is modify-in-place. */
desktop_file._delimit (" ", '-');
desktop_file = desktop_file.ascii_down ().concat (".desktop");
return lookup_heuristic_basename (desktop_file);
}
public void notify_app_state_changed (Gala.App app) {
if (app.state == Gala.AppState.RUNNING) {
running_apps.insert (app, app);
} else if (app.state == Gala.AppState.STOPPED) {
running_apps.remove (app);
}
}
public GLib.List<unowned Gala.App> get_running_apps () {
return running_apps.get_keys ();
}
}