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Remove event listeners with signal in web/annotation_layer_builder.js and web/text_highlighter.js

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This commit is contained in:
Jonas Jenwald 2024-04-21 09:41:21 +02:00
parent 2831caef13
commit 32b885c5ef
2 changed files with 26 additions and 28 deletions
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31
web/text_highlighter.js
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@ -29,6 +29,8 @@
* either the text layer or XFA layer depending on the type of document.
*/
class TextHighlighter {
#eventAbortController = null;
/**
* @param {TextHighlighterOptions} options
*/
@ -37,7 +39,6 @@ class TextHighlighter {
this.matches = [];
this.eventBus = eventBus;
this.pageIdx = pageIndex;
this._onUpdateTextLayerMatches = null;
this.textDivs = null;
this.textContentItemsStr = null;
this.enabled = false;
@ -69,15 +70,18 @@ class TextHighlighter {
throw new Error("TextHighlighter is already enabled.");
}
this.enabled = true;
if (!this._onUpdateTextLayerMatches) {
this._onUpdateTextLayerMatches = evt => {
if (evt.pageIndex === this.pageIdx || evt.pageIndex === -1) {
this._updateMatches();
}
};
if (!this.#eventAbortController) {
this.#eventAbortController = new AbortController();
this.eventBus._on(
"updatetextlayermatches",
this._onUpdateTextLayerMatches
evt => {
if (evt.pageIndex === this.pageIdx || evt.pageIndex === -1) {
this._updateMatches();
}
},
{ signal: this.#eventAbortController.signal }
);
}
this._updateMatches();
@ -88,13 +92,10 @@ class TextHighlighter {
return;
}
this.enabled = false;
if (this._onUpdateTextLayerMatches) {
this.eventBus._off(
"updatetextlayermatches",
this._onUpdateTextLayerMatches
);
this._onUpdateTextLayerMatches = null;
}
this.#eventAbortController?.abort();
this.#eventAbortController = null;
this._updateMatches(/* reset = */ true);
}