83 lines
1.9 KiB
JavaScript
83 lines
1.9 KiB
JavaScript
import contains from '../vc-util/Dom/contains';
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export function buffer(fn, ms) {
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let timer;
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function clear() {
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if (timer) {
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clearTimeout(timer);
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timer = null;
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}
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}
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function bufferFn() {
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clear();
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timer = setTimeout(fn, ms);
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}
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bufferFn.clear = clear;
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return bufferFn;
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}
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export function isSamePoint(prev, next) {
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if (prev === next) return true;
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if (!prev || !next) return false;
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if ('pageX' in next && 'pageY' in next) {
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return prev.pageX === next.pageX && prev.pageY === next.pageY;
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}
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if ('clientX' in next && 'clientY' in next) {
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return prev.clientX === next.clientX && prev.clientY === next.clientY;
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}
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return false;
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}
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export function isWindow(obj) {
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return obj && typeof obj === 'object' && obj.window === obj;
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}
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export function isSimilarValue(val1, val2) {
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const int1 = Math.floor(val1);
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const int2 = Math.floor(val2);
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return Math.abs(int1 - int2) <= 1;
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}
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export function restoreFocus(activeElement, container) {
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// Focus back if is in the container
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if (activeElement !== document.activeElement && contains(container, activeElement)) {
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activeElement.focus();
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}
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}
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export function monitorResize(element, callback) {
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let prevWidth = null;
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let prevHeight = null;
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function onResize([{ target }]) {
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if (!document.documentElement.contains(target)) return;
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const { width, height } = target.getBoundingClientRect();
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const fixedWidth = Math.floor(width);
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const fixedHeight = Math.floor(height);
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if (prevWidth !== fixedWidth || prevHeight !== fixedHeight) {
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// https://webkit.org/blog/9997/resizeobserver-in-webkit/
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Promise.resolve().then(() => {
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callback({ width: fixedWidth, height: fixedHeight });
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});
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}
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prevWidth = fixedWidth;
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prevHeight = fixedHeight;
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}
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const resizeObserver = new ResizeObserver(onResize);
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if (element) {
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resizeObserver.observe(element);
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}
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return () => {
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resizeObserver.disconnect();
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};
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}
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