ant-design-vue/components/_util/vnode.js

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import { filterEmpty, parseStyleText } from './props-util';
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import classNames from 'classnames';
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export function cloneVNode(vnode, deep) {
const componentOptions = vnode.componentOptions;
const data = vnode.data;
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let listeners = {};
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if (componentOptions && componentOptions.listeners) {
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listeners = { ...componentOptions.listeners };
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}
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let on = {};
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if (data && data.on) {
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on = { ...data.on };
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}
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const cloned = new vnode.constructor(
vnode.tag,
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data ? { ...data, on } : data,
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vnode.children,
vnode.text,
vnode.elm,
vnode.context,
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componentOptions ? { ...componentOptions, listeners } : componentOptions,
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vnode.asyncFactory,
);
cloned.ns = vnode.ns;
cloned.isStatic = vnode.isStatic;
cloned.key = vnode.key;
cloned.isComment = vnode.isComment;
cloned.fnContext = vnode.fnContext;
cloned.fnOptions = vnode.fnOptions;
cloned.fnScopeId = vnode.fnScopeId;
cloned.isCloned = true;
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if (deep) {
if (vnode.children) {
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cloned.children = cloneVNodes(vnode.children, true);
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}
if (componentOptions && componentOptions.children) {
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componentOptions.children = cloneVNodes(componentOptions.children, true);
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}
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}
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return cloned;
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}
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export function cloneVNodes(vnodes, deep) {
const len = vnodes.length;
const res = new Array(len);
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for (let i = 0; i < len; i++) {
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res[i] = cloneVNode(vnodes[i], deep);
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}
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return res;
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}
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export function cloneElement(n, nodeProps = {}, deep) {
let ele = n;
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if (Array.isArray(n)) {
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ele = filterEmpty(n)[0];
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}
if (!ele) {
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return null;
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}
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const node = cloneVNode(ele, deep);
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// // 函数式组件不支持clone https://github.com/vueComponent/ant-design-vue/pull/1947
// warning(
// !(node.fnOptions && node.fnOptions.functional),
// `can not use cloneElement for functional component (${node.fnOptions && node.fnOptions.name})`,
// );
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const { props = {}, key, on = {}, children, directives = [] } = nodeProps;
const data = node.data || {};
let cls = {};
let style = {};
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const {
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attrs = {},
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ref,
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domProps = {},
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style: tempStyle = {},
class: tempCls = {},
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scopedSlots = {},
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} = nodeProps;
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if (typeof data.style === 'string') {
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style = parseStyleText(data.style);
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} else {
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style = { ...data.style, ...style };
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}
if (typeof tempStyle === 'string') {
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style = { ...style, ...parseStyleText(style) };
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} else {
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style = { ...style, ...tempStyle };
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}
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if (typeof data.class === 'string' && data.class.trim() !== '') {
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data.class.split(' ').forEach(c => {
cls[c.trim()] = true;
});
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} else if (Array.isArray(data.class)) {
classNames(data.class)
.split(' ')
.forEach(c => {
cls[c.trim()] = true;
});
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} else {
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cls = { ...data.class, ...cls };
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}
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if (typeof tempCls === 'string' && tempCls.trim() !== '') {
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tempCls.split(' ').forEach(c => {
cls[c.trim()] = true;
});
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} else {
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cls = { ...cls, ...tempCls };
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}
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node.data = Object.assign({}, data, {
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style,
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attrs: { ...data.attrs, ...attrs },
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class: cls,
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domProps: { ...data.domProps, ...domProps },
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scopedSlots: { ...data.scopedSlots, ...scopedSlots },
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directives: [...(data.directives || []), ...directives],
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});
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if (node.componentOptions) {
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node.componentOptions.propsData = node.componentOptions.propsData || {};
node.componentOptions.listeners = node.componentOptions.listeners || {};
node.componentOptions.propsData = { ...node.componentOptions.propsData, ...props };
node.componentOptions.listeners = { ...node.componentOptions.listeners, ...on };
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if (children) {
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node.componentOptions.children = children;
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}
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} else {
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node.data.on = { ...(node.data.on || {}), ...on };
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}
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if (key !== undefined) {
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node.key = key;
node.data.key = key;
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}
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if (typeof ref === 'string') {
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node.data.ref = ref;
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}
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return node;
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}