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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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71
js/misc/objectManager.js
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@ -57,9 +57,7 @@ var ObjectManager = class {
// Start out inhibiting load until at least the proxy
// manager is loaded and the remote objects are fetched
this._numLoadInhibitors = 1;
this._managerProxy.init_async(GLib.PRIORITY_DEFAULT,
this._cancellable,
this._onManagerProxyLoaded.bind(this));
this._initManagerProxy();
}
_tryToCompleteLoad() {
@ -73,7 +71,7 @@ var ObjectManager = class {
}
}
_addInterface(objectPath, interfaceName, onFinished) {
async _addInterface(objectPath, interfaceName, onFinished) {
let info = this._interfaceInfos[interfaceName];
if (!info) {
@ -89,40 +87,38 @@ var ObjectManager = class {
g_interface_info: info,
g_flags: Gio.DBusProxyFlags.DO_NOT_AUTO_START });
proxy.init_async(GLib.PRIORITY_DEFAULT, this._cancellable, (initable, result) => {
try {
initable.init_finish(result);
} catch (e) {
logError(e, `could not initialize proxy for interface ${interfaceName}`);
if (onFinished)
onFinished();
return;
}
let isNewObject;
if (!this._objects[objectPath]) {
this._objects[objectPath] = {};
isNewObject = true;
} else {
isNewObject = false;
}
this._objects[objectPath][interfaceName] = proxy;
if (!this._interfaces[interfaceName])
this._interfaces[interfaceName] = [];
this._interfaces[interfaceName].push(proxy);
if (isNewObject)
this.emit('object-added', objectPath);
this.emit('interface-added', interfaceName, proxy);
try {
await proxy.init_async(GLib.PRIORITY_DEFAULT, this._cancellable);
} catch (e) {
logError(e, `could not initialize proxy for interface ${interfaceName}`);
if (onFinished)
onFinished();
});
return;
}
let isNewObject;
if (!this._objects[objectPath]) {
this._objects[objectPath] = {};
isNewObject = true;
} else {
isNewObject = false;
}
this._objects[objectPath][interfaceName] = proxy;
if (!this._interfaces[interfaceName])
this._interfaces[interfaceName] = [];
this._interfaces[interfaceName].push(proxy);
if (isNewObject)
this.emit('object-added', objectPath);
this.emit('interface-added', interfaceName, proxy);
if (onFinished)
onFinished();
}
_removeInterface(objectPath, interfaceName) {
@ -151,9 +147,10 @@ var ObjectManager = class {
}
}
_onManagerProxyLoaded(initable, result) {
async _initManagerProxy() {
try {
initable.init_finish(result);
await this._managerProxy.init_async(
GLib.PRIORITY_DEFAULT, this._cancellable);
} catch (e) {
logError(e, `could not initialize object manager for object ${this._serviceName}`);