/**
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* @fileoverview search 插件
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*/
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function Search (vm) {
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/**
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* @description 关键词搜索
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* @param {regexp|string} key 要搜索的关键词
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* @param {boolean} anchor 是否将搜索结果设置为锚点
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* @param {string} style 搜索结果的样式
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*/
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vm.search = function (key, anchor, style = 'background-color:yellow') {
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const res = []
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const stack = [];
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// 遍历搜索
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(function traversal (nodes) {
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for (let i = 0; i < nodes.length; i++) {
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let node = nodes[i]
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if (node.type === 'text' && key) {
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const text = node.text
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const arr = text.split(key)
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if (arr.length > 1) {
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node = {
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name: 'span',
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attrs: {},
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type: 'node',
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c: 1,
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s: 1,
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children: []
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}
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vm.$set(nodes, i, node)
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for (let j = 0; j < arr.length; j++) {
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if (arr[j]) {
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node.children.push({
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type: 'text',
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text: arr[j]
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})
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}
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if (j !== arr.length - 1) {
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// 关键词转为一个 span
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node.children.push({
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name: 'span',
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attrs: {
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id: anchor ? 'search' + (res.length + 1) : undefined, // 用于锚点的 id
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style: style
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},
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// #ifdef VUE3
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c: 1,
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// #endif
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children: [{
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type: 'text',
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text: key instanceof RegExp ? key.exec(text)[0] : key
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}]
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})
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res.push(node.children[node.children.length - 1].attrs)
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}
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}
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if (key instanceof RegExp) {
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key.exec(text)
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}
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if (anchor) {
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for (let l = stack.length; l--;) {
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if (stack[l].c) {
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break
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} else {
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vm.$set(stack[l], 'c', 1)
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}
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}
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}
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}
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} else if (node.s) {
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let text = ''
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// 复原上一次的结果
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for (let k = 0; k < node.children.length; k++) {
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const child = node.children[k]
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if (child.text) {
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text += child.text
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} else {
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text += child.children[0].text
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}
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}
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vm.$set(nodes, i, {
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type: 'text',
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text
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})
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if (key && (key instanceof RegExp ? key.test(text) : text.includes(key))) {
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i--
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}
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} else if (node.children) {
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stack.push(node)
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traversal(node.children)
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stack.pop()
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}
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}
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})(vm.nodes)
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return new Promise(function (resolve) {
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setTimeout(() => {
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resolve({
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num: res.length, // 结果数量
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/**
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* @description 高亮某一个结果
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* @param {number} i 第几个
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* @param {string} hlstyle 高亮的样式
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*/
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highlight (i, hlstyle = 'background-color:#FF9632') {
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if (i < 1 || i > res.length) return
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if (this.last) {
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res[this.last - 1].style = style
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}
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this.last = i
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res[i - 1].style = hlstyle
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},
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/**
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* @description 跳转到搜索结果
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* @param {number} i 第几个
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* @param {number} offset 偏移量
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*/
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jump: anchor
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? (i, offset) => {
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if (i > 0 && i <= res.length) {
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vm.navigateTo('search' + i, offset)
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}
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}
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: undefined
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})
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}, 200)
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})
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}
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}
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module.exports = Search
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