36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
/* eslint-disable no-nested-ternary */
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import { cancel, request } from './animationFrame';
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import height from './height';
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import getWindow from './isWindow';
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import getOffset from './offset';
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import getScrollParent from './scrollParent';
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import scrollTop from './scrollTop';
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export default function scrollTo(selected, scrollParent) {
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var offset = getOffset(selected);
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var poff = {
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top: 0,
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left: 0
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};
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if (!selected) return undefined;
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var list = scrollParent || getScrollParent(selected);
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var isWin = getWindow(list);
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var listScrollTop = scrollTop(list);
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var listHeight = height(list, true);
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if (!isWin) poff = getOffset(list);
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offset = {
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top: offset.top - poff.top,
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left: offset.left - poff.left,
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height: offset.height,
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width: offset.width
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};
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var selectedHeight = offset.height;
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var selectedTop = offset.top + (isWin ? 0 : listScrollTop);
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var bottom = selectedTop + selectedHeight;
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listScrollTop = listScrollTop > selectedTop ? selectedTop : bottom > listScrollTop + listHeight ? bottom - listHeight : listScrollTop;
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var id = request(function () {
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return scrollTop(list, listScrollTop);
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});
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return function () {
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return cancel(id);
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};
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} |