vxe-pc-ui/es/ui/src/dom.js

A vue based PC component library

import XEUtils from 'xe-utils';
let tpImgEl;
export function initTpImg() {
    if (!tpImgEl) {
        tpImgEl = new Image();
        tpImgEl.src = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=';
    }
    return tpImgEl;
}
export function getTpImg() {
    if (!tpImgEl) {
        return initTpImg();
    }
    return tpImgEl;
}
const reClsMap = {};
function getClsRE(cls) {
    if (!reClsMap[cls]) {
        reClsMap[cls] = new RegExp(`(?:^|\\s)${cls}(?!\\S)`, 'g');
    }
    return reClsMap[cls];
}
function getNodeOffset(elem, container, rest) {
    if (elem) {
        const parentElem = elem.parentNode;
        rest.top += elem.offsetTop;
        rest.left += elem.offsetLeft;
        if (parentElem && parentElem !== document.documentElement && parentElem !== document.body) {
            rest.top -= parentElem.scrollTop;
            rest.left -= parentElem.scrollLeft;
        }
        if (container && (elem === container || elem.offsetParent === container) ? 0 : elem.offsetParent) {
            return getNodeOffset(elem.offsetParent, container, rest);
        }
    }
    return rest;
}
export function isPx(val) {
    return val && /^\d+(px)?$/.test(val);
}
export function isScale(val) {
    return val && /^\d+%$/.test(val);
}
export function hasClass(elem, cls) {
    return elem && elem.className && elem.className.match && elem.className.match(getClsRE(cls));
}
export function removeClass(elem, cls) {
    if (elem && hasClass(elem, cls)) {
        elem.className = elem.className.replace(getClsRE(cls), '');
    }
}
export function addClass(elem, cls) {
    if (elem && !hasClass(elem, cls)) {
        removeClass(elem, cls);
        elem.className = `${elem.className} ${cls}`;
    }
}
export function toCssUnit(val, unit = 'px') {
    if (XEUtils.isNumber(val) || /^\d+$/.test(`${val}`)) {
        return `${val}${unit}`;
    }
    return `${val || ''}`;
}
export function getDomNode() {
    const documentElement = document.documentElement;
    const bodyElem = document.body;
    return {
        scrollTop: documentElement.scrollTop || bodyElem.scrollTop,
        scrollLeft: documentElement.scrollLeft || bodyElem.scrollLeft,
        visibleHeight: documentElement.clientHeight || bodyElem.clientHeight,
        visibleWidth: documentElement.clientWidth || bodyElem.clientWidth
    };
}
/**
 * 检查触发源是否属于目标节点
 */
export function getEventTargetNode(evnt, container, queryCls, queryMethod) {
    let targetElem;
    let target = (evnt.target.shadowRoot && evnt.composed) ? (evnt.composedPath()[0] || evnt.target) : evnt.target;
    while (target && target.nodeType && target !== document) {
        if (queryCls && hasClass(target, queryCls) && (!queryMethod || queryMethod(target))) {
            targetElem = target;
        }
        else if (target === container) {
            return { flag: queryCls ? !!targetElem : true, container, targetElem: targetElem };
        }
        target = target.parentNode;
    }
    return { flag: false };
}
/**
 * 获取元素相对于 document 的位置
 */
export function getOffsetPos(elem, container) {
    return getNodeOffset(elem, container, { left: 0, top: 0 });
}
export function getAbsolutePos(elem) {
    const bounding = elem.getBoundingClientRect();
    const boundingTop = bounding.top;
    const boundingLeft = bounding.left;
    const { scrollTop, scrollLeft, visibleHeight, visibleWidth } = getDomNode();
    return { boundingTop, top: scrollTop + boundingTop, boundingLeft, left: scrollLeft + boundingLeft, visibleHeight, visibleWidth };
}
const scrollIntoViewIfNeeded = 'scrollIntoViewIfNeeded';
const scrollIntoView = 'scrollIntoView';
export function scrollToView(elem) {
    if (elem) {
        if (elem[scrollIntoViewIfNeeded]) {
            elem[scrollIntoViewIfNeeded]();
        }
        else if (elem[scrollIntoView]) {
            elem[scrollIntoView]();
        }
    }
}
export function triggerEvent(targetElem, type) {
    if (targetElem) {
        targetElem.dispatchEvent(new Event(type));
    }
}
export function isNodeElement(elem) {
    return elem && elem.nodeType === 1;
}