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js: Promisify async operations

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Promises make asynchronous operations easier to manage, in particular
when used through the async/await syntax that allows for asynchronous
code to closely resemble synchronous one.

gjs has included a Gio._promisify() helper for a while now, which
monkey-patches methods that follow GIO's async pattern to return a
Promise when called without a callback argument.

Use that to get rid of all those GAsyncReadyCallbacks!

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1126
This commit is contained in:
Florian Müllner
2019-12-19 20:50:37 +01:00
committed by Florian Müllner
parent 18742fcc32
commit 764527c8c9
20 changed files with 409 additions and 428 deletions
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64
js/misc/loginManager.js
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@ -50,25 +50,22 @@ function canLock() {
}
function registerSessionWithGDM() {
async function registerSessionWithGDM() {
log("Registering session with GDM");
Gio.DBus.system.call('org.gnome.DisplayManager',
'/org/gnome/DisplayManager/Manager',
'org.gnome.DisplayManager.Manager',
'RegisterSession',
GLib.Variant.new('(a{sv})', [{}]), null,
Gio.DBusCallFlags.NONE, -1, null,
(source, result) => {
try {
source.call_finish(result);
} catch (e) {
if (!e.matches(Gio.DBusError, Gio.DBusError.UNKNOWN_METHOD))
log(`Error registering session with GDM: ${e.message}`);
else
log("Not calling RegisterSession(): method not exported, GDM too old?");
}
}
);
try {
await Gio.DBus.system.call(
'org.gnome.DisplayManager',
'/org/gnome/DisplayManager/Manager',
'org.gnome.DisplayManager.Manager',
'RegisterSession',
GLib.Variant.new('(a{sv})', [{}]), null,
Gio.DBusCallFlags.NONE, -1, null);
} catch (e) {
if (!e.matches(Gio.DBusError, Gio.DBusError.UNKNOWN_METHOD))
log(`Error registering session with GDM: ${e.message}`);
else
log('Not calling RegisterSession(): method not exported, GDM too old?');
}
}
let _loginManager = null;
@ -174,24 +171,19 @@ var LoginManagerSystemd = class {
this._proxy.SuspendRemote(true);
}
inhibit(reason, callback) {
let inVariant = GLib.Variant.new('(ssss)',
['sleep',
'GNOME Shell',
reason,
'delay']);
this._proxy.call_with_unix_fd_list('Inhibit', inVariant, 0, -1, null, null,
(proxy, result) => {
let fd = -1;
try {
let [outVariant_, fdList] = proxy.call_with_unix_fd_list_finish(result);
fd = fdList.steal_fds()[0];
callback(new Gio.UnixInputStream({ fd }));
} catch (e) {
logError(e, "Error getting systemd inhibitor");
callback(null);
}
});
async inhibit(reason, callback) {
try {
const inVariant = new GLib.Variant('(ssss)',
['sleep', 'GNOME Shell', reason, 'delay']);
const [outVariant_, fdList] =
await this._proxy.call_with_unix_fd_list('Inhibit',
inVariant, 0, -1, null, null);
const [fd] = fdList.steal_fds();
callback(new Gio.UnixInputStream({ fd }));
} catch (e) {
logError(e, 'Error getting systemd inhibitor');
callback(null);
}
}
_prepareForSleep(proxy, sender, [aboutToSuspend]) {