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44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
import Embed from '../blots/embed.js';
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import Emitter from './emitter.js';
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class Composition {
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isComposing = false;
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constructor(scroll, emitter) {
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this.scroll = scroll;
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this.emitter = emitter;
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this.setupListeners();
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}
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setupListeners() {
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this.scroll.domNode.addEventListener('compositionstart', event => {
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if (!this.isComposing) {
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this.handleCompositionStart(event);
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}
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});
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this.scroll.domNode.addEventListener('compositionend', event => {
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if (this.isComposing) {
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// Webkit makes DOM changes after compositionend, so we use microtask to
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// ensure the order.
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// https://bugs.webkit.org/show_bug.cgi?id=31902
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queueMicrotask(() => {
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this.handleCompositionEnd(event);
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});
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}
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});
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}
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handleCompositionStart(event) {
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const blot = event.target instanceof Node ? this.scroll.find(event.target, true) : null;
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if (blot && !(blot instanceof Embed)) {
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this.emitter.emit(Emitter.events.COMPOSITION_BEFORE_START, event);
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this.scroll.batchStart();
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this.emitter.emit(Emitter.events.COMPOSITION_START, event);
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this.isComposing = true;
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}
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}
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handleCompositionEnd(event) {
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this.emitter.emit(Emitter.events.COMPOSITION_BEFORE_END, event);
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this.scroll.batchEnd();
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this.emitter.emit(Emitter.events.COMPOSITION_END, event);
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this.isComposing = false;
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}
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}
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export default Composition;
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//# sourceMappingURL=composition.js.map
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