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Adopt EventEmitter class instead of injecting Signal methods

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Introduce a new class, EventEmitter, which implements signal
handling for pure JavaScript classes. EventEmitter still
utilizes GJS' addSignalMethods internally.

EventEmitter allows static typechecking to understand the
structure of event-emitting JS classes and makes creating
child classes simpler.

The name 'EventEmitter' mirrors a common name for this pattern
in Node and in JS libraries.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2043>
This commit is contained in:
Evan Welsh 2022-07-04 18:30:44 -04:00
parent 9e30afe678
commit a88e59c1a8
39 changed files with 204 additions and 169 deletions
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7
js/ui/padOsd.js
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@ -5,7 +5,7 @@ const {
Atk, Clutter, GDesktopEnums, Gio,
GLib, GObject, Gtk, Meta, Pango, Rsvg, St,
} = imports.gi;
const Signals = imports.signals;
const Signals = imports.misc.signals;
const Main = imports.ui.main;
const PopupMenu = imports.ui.popupMenu;
@ -957,8 +957,10 @@ var PadOsd = GObject.registerClass({
const PadOsdIface = loadInterfaceXML('org.gnome.Shell.Wacom.PadOsd');
var PadOsdService = class {
var PadOsdService = class extends Signals.EventEmitter {
constructor() {
super();
this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(PadOsdIface, this);
this._dbusImpl.export(Gio.DBus.session, '/org/gnome/Shell/Wacom');
Gio.DBus.session.own_name('org.gnome.Shell.Wacom.PadOsd', Gio.BusNameOwnerFlags.REPLACE, null, null);
@ -987,4 +989,3 @@ var PadOsdService = class {
invocation.return_value(null);
}
};
Signals.addSignalMethods(PadOsdService.prototype);