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lazy load element sources

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siikamiika 2020-04-18 17:18:33 +03:00
parent bb3ad78e37
commit 66354f1f9e
1 changed files with 18 additions and 5 deletions
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23
ext/fg/js/frame-offset-forwarder.js
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@ -89,14 +89,27 @@ class FrameOffsetForwarder {
}
_findFrameWithContentWindow(contentWindow) {
const elements = [
...this._frameCache,
const elementSources = [
() => [...this._frameCache],
// will contain duplicates, but frame elements are cheap to handle
...document.querySelectorAll('frame, iframe:not(.yomichan-float)'),
document.documentElement
() => [...document.querySelectorAll('frame, iframe:not(.yomichan-float)')],
() => [document.documentElement]
];
const getMoreElements = () => {
while (true) {
const source = elementSources.shift();
if (source) {
const elements = source();
if (elements.length === 0) { continue; }
return elements;
}
return [];
}
};
const elements = [];
const ELEMENT_NODE = Node.ELEMENT_NODE;
while (elements.length > 0) {
while (elements.length > 0 || elements.push(...getMoreElements())) {
const element = elements.shift();
if (element.contentWindow === contentWindow) {
this._frameCache.add(element);