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Don't register a pending TextLayer until render is invoked (PR 18104 follow-up)

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After the re-factoring in PR 18104 there's now a *theoretical* risk that a pending `TextLayer` is never removed, which we can avoid by not registering it until `render` is invoked.
Note that this doesn't affect the viewer or tests, but if a third-party user calls `new TextLayer(...)` without a following call of either the `render`- or `cancel`-method we'd block global clean-up without this patch.
This commit is contained in:
Jonas Jenwald 2024-05-26 18:28:26 +02:00
parent 17e09e5478
commit f2e7eee00e
1 changed files with 2 additions and 1 deletions
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3
src/display/text_layer.js
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@ -122,7 +122,6 @@ class TextLayer {
setLayerDimensions(container, viewport);
TextLayer.#pendingTextLayers.add(this);
// Always clean-up the temporary canvas once rendering is no longer pending.
this.#capability.promise
.catch(() => {
@ -167,6 +166,7 @@ class TextLayer {
}, this.#capability.reject);
};
this.#reader = this.#textContentSource.getReader();
TextLayer.#pendingTextLayers.add(this);
pump();
return this.#capability.promise;
@ -423,6 +423,7 @@ class TextLayer {
return;
}
this.#ascentCache.clear();
for (const { canvas } of this.#canvasContexts.values()) {
canvas.remove();
}