gnome-shell/js/misc/ibusManager.js
Florian Müllner 3b1330880f cleanup: Use Function.prototype.bind()
When not using arrow notation with anonymous functions, we use Lang.bind()
to bind `this` to named callbacks. However since ES5, this functionality
is already provided by Function.prototype.bind() - in fact, Lang.bind()
itself uses it when no extra arguments are specified. Just use the built-in
function directly where possible, and use arrow notation in the few places
where we pass additional arguments.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/23
2018-02-21 13:55:02 +00:00

229 lines
7.6 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Signals = imports.signals;
const IBus = imports.gi.IBus;
const IBusCandidatePopup = imports.ui.ibusCandidatePopup;
// Ensure runtime version matches
_checkIBusVersion(1, 5, 2);
let _ibusManager = null;
function _checkIBusVersion(requiredMajor, requiredMinor, requiredMicro) {
if ((IBus.MAJOR_VERSION > requiredMajor) ||
(IBus.MAJOR_VERSION == requiredMajor && IBus.MINOR_VERSION > requiredMinor) ||
(IBus.MAJOR_VERSION == requiredMajor && IBus.MINOR_VERSION == requiredMinor &&
IBus.MICRO_VERSION >= requiredMicro))
return;
throw "Found IBus version %d.%d.%d but required is %d.%d.%d".
format(IBus.MAJOR_VERSION, IBus.MINOR_VERSION, IBus.MINOR_VERSION,
requiredMajor, requiredMinor, requiredMicro);
}
function getIBusManager() {
if (_ibusManager == null)
_ibusManager = new IBusManager();
return _ibusManager;
}
var IBusManager = new Lang.Class({
Name: 'IBusManager',
// This is the longest we'll keep the keyboard frozen until an input
// source is active.
_MAX_INPUT_SOURCE_ACTIVATION_TIME: 4000, // ms
_PRELOAD_ENGINES_DELAY_TIME: 30, // sec
_init() {
IBus.init();
this._candidatePopup = new IBusCandidatePopup.CandidatePopup();
this._panelService = null;
this._engines = {};
this._ready = false;
this._registerPropertiesId = 0;
this._currentEngineName = null;
this._preloadEnginesId = 0;
this._ibus = IBus.Bus.new_async();
this._ibus.connect('connected', this._onConnected.bind(this));
this._ibus.connect('disconnected', this._clear.bind(this));
// Need to set this to get 'global-engine-changed' emitions
this._ibus.set_watch_ibus_signal(true);
this._ibus.connect('global-engine-changed', this._engineChanged.bind(this));
this._spawn();
},
_spawn() {
try {
Gio.Subprocess.new(['ibus-daemon', '--xim', '--panel', 'disable'],
Gio.SubprocessFlags.NONE);
} catch(e) {
log('Failed to launch ibus-daemon: ' + e.message);
}
},
_clear() {
if (this._panelService)
this._panelService.destroy();
this._panelService = null;
this._candidatePopup.setPanelService(null);
this._engines = {};
this._ready = false;
this._registerPropertiesId = 0;
this._currentEngineName = null;
this.emit('ready', false);
this._spawn();
},
_onConnected() {
this._ibus.list_engines_async(-1, null, this._initEngines.bind(this));
this._ibus.request_name_async(IBus.SERVICE_PANEL,
IBus.BusNameFlag.REPLACE_EXISTING,
-1, null,
this._initPanelService.bind(this));
},
_initEngines(ibus, result) {
let enginesList = this._ibus.list_engines_async_finish(result);
if (enginesList) {
for (let i = 0; i < enginesList.length; ++i) {
let name = enginesList[i].get_name();
this._engines[name] = enginesList[i];
}
this._updateReadiness();
} else {
this._clear();
}
},
_initPanelService(ibus, result) {
let success = this._ibus.request_name_async_finish(result);
if (success) {
this._panelService = new IBus.PanelService({ connection: this._ibus.get_connection(),
object_path: IBus.PATH_PANEL });
this._candidatePopup.setPanelService(this._panelService);
this._panelService.connect('update-property', this._updateProperty.bind(this));
try {
// IBus versions older than 1.5.10 have a bug which
// causes spurious set-content-type emissions when
// switching input focus that temporarily lose purpose
// and hints defeating its intended semantics and
// confusing users. We thus don't use it in that case.
_checkIBusVersion(1, 5, 10);
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, null, (i, result) => {
let engine;
try {
engine = this._ibus.get_global_engine_async_finish(result);
if (!engine)
return;
} catch(e) {
return;
}
this._engineChanged(this._ibus, engine.get_name());
});
this._updateReadiness();
} else {
this._clear();
}
},
_updateReadiness() {
this._ready = (Object.keys(this._engines).length > 0 &&
this._panelService != null);
this.emit('ready', this._ready);
},
_engineChanged(bus, engineName) {
if (!this._ready)
return;
this._currentEngineName = engineName;
if (this._registerPropertiesId != 0)
return;
this._registerPropertiesId =
this._panelService.connect('register-properties', (p, props) => {
if (!props.get(0))
return;
this._panelService.disconnect(this._registerPropertiesId);
this._registerPropertiesId = 0;
this.emit('properties-registered', this._currentEngineName, props);
});
},
_updateProperty(panel, prop) {
this.emit('property-updated', this._currentEngineName, prop);
},
_setContentType(panel, purpose, hints) {
this.emit('set-content-type', purpose, hints);
},
activateProperty(key, state) {
this._panelService.property_activate(key, state);
},
getEngineDesc(id) {
if (!this._ready || !this._engines.hasOwnProperty(id))
return null;
return this._engines[id];
},
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.
if (!this._ready) {
if (callback)
callback();
return;
}
this._ibus.set_global_engine_async(id, this._MAX_INPUT_SOURCE_ACTIVATION_TIME,
null, callback);
},
preloadEngines(ids) {
if (!this._ibus || ids.length == 0)
return;
if (this._preloadEnginesId != 0) {
Mainloop.source_remove(this._preloadEnginesId);
this._preloadEnginesId = 0;
}
this._preloadEnginesId =
Mainloop.timeout_add_seconds(this._PRELOAD_ENGINES_DELAY_TIME,
() => {
this._ibus.preload_engines_async(
ids,
-1,
null,
null);
this._preloadEnginesId = 0;
return GLib.SOURCE_REMOVE;
});
},
});
Signals.addSignalMethods(IBusManager.prototype);