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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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70
js/misc/ibusManager.js
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@ -6,6 +6,15 @@ const Signals = imports.signals;
const IBusCandidatePopup = imports.ui.ibusCandidatePopup;
Gio._promisify(IBus.Bus.prototype,
'list_engines_async', 'list_engines_async_finish');
Gio._promisify(IBus.Bus.prototype,
'request_name_async', 'request_name_async_finish');
Gio._promisify(IBus.Bus.prototype,
'get_global_engine_async', 'get_global_engine_async_finish');
Gio._promisify(IBus.Bus.prototype,
'set_global_engine_async', 'set_global_engine_async_finish');
// Ensure runtime version matches
_checkIBusVersion(1, 5, 2);
@ -102,16 +111,14 @@ var IBusManager = class {
_onConnected() {
this._cancellable = new Gio.Cancellable();
this._ibus.list_engines_async(-1, this._cancellable,
this._initEngines.bind(this));
this._ibus.request_name_async(IBus.SERVICE_PANEL,
IBus.BusNameFlag.REPLACE_EXISTING, -1, this._cancellable,
this._initPanelService.bind(this));
this._initEngines();
this._initPanelService();
}
_initEngines(ibus, result) {
async _initEngines() {
try {
let enginesList = this._ibus.list_engines_async_finish(result);
const enginesList =
await this._ibus.list_engines_async(-1, this._cancellable);
for (let i = 0; i < enginesList.length; ++i) {
let name = enginesList[i].get_name();
this._engines.set(name, enginesList[i]);
@ -126,9 +133,10 @@ var IBusManager = class {
}
}
_initPanelService(ibus, result) {
async _initPanelService() {
try {
this._ibus.request_name_async_finish(result);
await this._ibus.request_name_async(IBus.SERVICE_PANEL,
IBus.BusNameFlag.REPLACE_EXISTING, -1, this._cancellable);
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED)) {
logError(e);
@ -163,19 +171,15 @@ var IBusManager = class {
this._panelService.connect('set-content-type', this._setContentType.bind(this));
} catch (e) {
}
// If an engine is already active we need to get its properties
this._ibus.get_global_engine_async(-1, this._cancellable, (_bus, res) => {
let engine;
try {
engine = this._ibus.get_global_engine_async_finish(res);
if (!engine)
return;
} catch (e) {
return;
}
try {
// If an engine is already active we need to get its properties
const engine =
await this._ibus.get_global_engine_async(-1, this._cancellable);
this._engineChanged(this._ibus, engine.get_name());
});
this._updateReadiness();
this._updateReadiness();
} catch (e) {
}
}
_updateReadiness() {
@ -223,7 +227,7 @@ var IBusManager = class {
return this._engines.get(id);
}
setEngine(id, callback) {
async setEngine(id, callback) {
// Send id even if id == this._currentEngineName
// because 'properties-registered' signal can be emitted
// while this._ibusSources == null on a lock screen.
@ -233,18 +237,16 @@ var IBusManager = class {
return;
}
this._ibus.set_global_engine_async(id,
this._MAX_INPUT_SOURCE_ACTIVATION_TIME,
this._cancellable, (_bus, res) => {
try {
this._ibus.set_global_engine_async_finish(res);
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
logError(e);
}
if (callback)
callback();
});
try {
await this._ibus.set_global_engine_async(id,
this._MAX_INPUT_SOURCE_ACTIVATION_TIME,
this._cancellable);
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
logError(e);
}
if (callback)
callback();
}
preloadEngines(ids) {