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toasted-nutbread 2020-03-07 10:48:56 -05:00
parent 93aa275d82
commit ba64f34df1
1 changed files with 18 additions and 18 deletions
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36
ext/bg/js/clipboard-monitor.js
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@ -21,59 +21,59 @@
class ClipboardMonitor extends EventDispatcher { class ClipboardMonitor extends EventDispatcher {
constructor({getClipboard}) { constructor({getClipboard}) {
super(); super();
this.timerId = null; this._timerId = null;
this.timerToken = null; this._timerToken = null;
this.interval = 250; this._interval = 250;
this.previousText = null; this._previousText = null;
this.getClipboard = getClipboard; this._getClipboard = getClipboard;
} }
start() { start() {
this.stop(); this.stop();
// The token below is used as a unique identifier to ensure that a new clipboard monitor // The token below is used as a unique identifier to ensure that a new clipboard monitor
// hasn't been started during the await call. The check below the await this.getClipboard() // hasn't been started during the await call. The check below the await this._getClipboard()
// call will exit early if the reference has changed. // call will exit early if the reference has changed.
const token = {}; const token = {};
const intervalCallback = async () => { const intervalCallback = async () => {
this.timerId = null; this._timerId = null;
let text = null; let text = null;
try { try {
text = await this.getClipboard(); text = await this._getClipboard();
} catch (e) { } catch (e) {
// NOP // NOP
} }
if (this.timerToken !== token) { return; } if (this._timerToken !== token) { return; }
if ( if (
typeof text === 'string' && typeof text === 'string' &&
(text = text.trim()).length > 0 && (text = text.trim()).length > 0 &&
text !== this.previousText text !== this._previousText
) { ) {
this.previousText = text; this._previousText = text;
if (jpIsStringPartiallyJapanese(text)) { if (jpIsStringPartiallyJapanese(text)) {
this.trigger('change', {text}); this.trigger('change', {text});
} }
} }
this.timerId = setTimeout(intervalCallback, this.interval); this._timerId = setTimeout(intervalCallback, this._interval);
}; };
this.timerToken = token; this._timerToken = token;
intervalCallback(); intervalCallback();
} }
stop() { stop() {
this.timerToken = null; this._timerToken = null;
if (this.timerId !== null) { if (this._timerId !== null) {
clearTimeout(this.timerId); clearTimeout(this._timerId);
this.timerId = null; this._timerId = null;
} }
} }
setPreviousText(text) { setPreviousText(text) {
this.previousText = text; this._previousText = text;
} }
} }