ant-design-vue/components/vc-align/util.js

84 lines
2.0 KiB
JavaScript

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