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result-list.js
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37 lines (29 loc) · 1.06 KB
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
import { isFirefox } from "devtools-config";
function scrollList(resultList, index) {
if (!resultList.hasOwnProperty(index)) {
return;
}
const resultEl = resultList[index];
if (isFirefox()) {
resultEl.scrollIntoView({ block: "center", behavior: "smooth" });
} else {
chromeScrollList(resultEl, index);
}
}
function chromeScrollList(elem, index) {
const resultsEl = elem.parentNode;
if (!resultsEl || resultsEl.children.length === 0) {
return;
}
const resultsHeight = resultsEl.clientHeight;
const itemHeight = resultsEl.children[0].clientHeight;
const numVisible = resultsHeight / itemHeight;
const positionsToScroll = index - numVisible + 1;
const itemOffset = resultsHeight % itemHeight;
const scroll = positionsToScroll * (itemHeight + 2) + itemOffset;
resultsEl.scrollTop = Math.max(0, scroll);
}
export { scrollList };