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414 lines
9.5 KiB
Vue
414 lines
9.5 KiB
Vue
<template>
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<view class="t-wrap">
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<!-- 虚拟view用于计算，计算完成则消失 -->
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<view class="t-txt-hide" :id="hid" v-if="!isCompute" :style="[computeStyle(0),{'text-align':oneRowTextAlign}]">
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<text space="nbsp">{{testContent?testContent:content}}{{showSymbol?'...':''}}</text><text
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v-if="expandText && collapseText && showSymbol" class="t-button">
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{{expandText}}
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</text><text></text>
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</view>
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<!-- 真实显示的内容 -->
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<view class="t-ellipsis" :id="id"
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:style="[!isCompute?computeStyle(1):computeStyle(2),{'text-align':oneRowTextAlign}]" @click="contentClick">
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<text space="nbsp">{{(!isCompute || expand)?content:(actualContent+(showSymbol?'...':''))}}</text><text
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v-if="expandText && collapseText && showSymbol" class="t-button" @click.stop="changeCollapse"
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:style="{'color':actionFontColor}">{{!expand?expandText:collapseText}}</text><text></text>
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</view>
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<!-- 这里加入了自定义的动态骨架屏友好反馈 -->
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<view v-if="!isCompute && rows>0" class="t-skeleton">
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<view class="skeletons" v-for="(item,index) in rows" :key="index">
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<view class="empty"></view>
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</view>
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</view>
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</view>
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</template>
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<script>
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//为了兼容部分老机型，增加扰动因子参数
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const factor = 5;
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export default {
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name: "KevyEllipsis",
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props: {
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/**
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* 文本唯一标识符，非必填
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*/
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textId: {
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type: [String, Number],
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default: ''
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},
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/**
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* 文本内容，默认''
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*/
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content: {
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type: String,
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default: ''
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},
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/**
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* 字体大小，单位rpx，默认28
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*/
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fontSize: {
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type: [String, Number],
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default: 28
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},
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/**
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* 字体颜色，默认#666666
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*/
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fontColor: {
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color: String,
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default: '#666666'
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},
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/**
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* 收起操作的文案，默认''
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*/
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collapseText: {
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type: String,
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default: ''
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},
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/**
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* 展开操作的文案，默认''
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*/
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expandText: {
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type: String,
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default: ''
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},
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/**
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* 收起、展开操作文字颜色，默认'#007aff'
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*/
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actionFontColor: {
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color: String,
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default: '#007aff'
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},
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/**
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* 展示行数，默认1
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*/
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rows: {
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type: Number,
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default: 1
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},
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/**
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* 只有一行时文本对齐方式，支持left、right、justify
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*/
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oneRowTextAlign: {
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type: String,
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default: "justify"
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},
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},
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data() {
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return {
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//是否展开
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expand: false,
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//是否已计算
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isCompute: false,
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//内容高度
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h: undefined,
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//内容宽度
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w: undefined,
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//实际显示内容
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actualContent: '',
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//高度探测内容
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testContent: undefined,
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//是否显示省略号
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showSymbol: false,
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//hid和id,唯一标识符
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hid: 'hid' + Math.random().toString(36).substr(2),
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id: 'id' + Math.random().toString(36).substr(2),
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};
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},
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mounted() {
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this.$nextTick(() => {
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this.initEllipsis();
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})
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},
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computed: {
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//动态计算组件样式
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computeStyle() {
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return b => {
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let lines = this.rows > 0 ? this.rows : 1;
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let obj = {};
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if (b == 1) {
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obj = {
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'-webkit-line-clamp': lines,
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'display': '-webkit-box',
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'text-overflow': 'ellipsis',
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'overflow': 'hidden',
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'-webkit-box-orient': 'vertical'
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};
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} else if (b == 2) {
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obj = {
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'position': 'relative',
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'left': '0rpx',
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...obj
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};
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}
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return {
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'font-size': this.fontSize + 'rpx',
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'color': this.fontColor,
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...obj
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}
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}
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}
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},
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watch: {
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content(newVal, oldVal) {
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this.expand=false;
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this.isCompute=false;
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this.h=undefined;
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this.w=undefined;
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this.actualContent='';
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this.showSymbol=false;
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this.initEllipsis();
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}
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},
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methods: {
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//初始化
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initEllipsis() {
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if (this.content?.length > 0) {
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this.$nextTick(() => {
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this.init(this, () => {
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this.compute(this);
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})
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})
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}
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},
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//收起展开状态切换
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changeCollapse() {
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this.expand = !this.expand;
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},
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//文本点击事件
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contentClick() {
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this.$emit('contentClick', this.textId);
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},
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//组件参数初始化
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init($this, callback, isali) {
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if (isali) {
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uni.createSelectorQuery().in().select('#' + $this.id).boundingClientRect(d => {
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$this.h = Number(d.height.toFixed(1));
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$this.w = Number(d.width.toFixed(1));
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if (callback) {
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callback()
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}
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}).exec();
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} else {
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uni.createSelectorQuery().in($this).select('#' + $this.id).boundingClientRect(d => {
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$this.h = Number(d.height.toFixed(1));
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$this.w = Number(d.width.toFixed(1));
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if (callback) {
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callback()
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}
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}).exec();
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}
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},
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//动态计算组件内容
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computeContent($this, isali, dr) {
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$this.$nextTick(() => {
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$this.getH($this, isali, (ch) => {
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if (ch - factor > $this.h) {
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if (dr === -1) {
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$this.testContent = $this.content.substring(0, $this.testContent.length -
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1);
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$this.computeContent($this, isali, dr);
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} else {
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$this.actualContent = $this.content.substring(0, $this.testContent.length -
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1);
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$this.isCompute = true;
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}
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} else {
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if (dr === -1) {
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$this.actualContent = $this.testContent;
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$this.isCompute = true;
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} else {
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$this.testContent = $this.content.substring(0, $this.testContent.length +
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1);
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$this.computeContent($this, isali, dr);
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}
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}
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})
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});
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},
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//计算工具方法
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compute($this, isali) {
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let {
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rows,
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fontSize,
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content,
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h,
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w
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} = $this;
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$this.testContent = content;
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$this.$nextTick(() => {
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$this.getH($this, isali, (ch) => {
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if (ch - factor > h) {
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let lh = h / rows;
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let fn = Math.floor(w / $this.rpx2px(fontSize));
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let sfn = fn * rows;
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let i = $this.fontNum(content, sfn * 2 - ($this.expandText ? $this.fontNum(
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$this.expandText) :
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0) - 3);
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$this.showSymbol = true;
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$this.testContent = content.substring(0, i);
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$this.$nextTick(() => {
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$this.getH($this, isali, (ch1) => {
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if (ch1 - factor > h) {
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$this.testContent = content.substring(0, $this
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.testContent.length - 1);
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$this.computeContent($this, isali, -1);
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} else {
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$this.testContent = content.substring(0, $this
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.testContent.length + 1);
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$this.computeContent($this, isali, 1);
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}
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});
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});
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} else {
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$this.isCompute = true;
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$this.actualContent = content;
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}
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})
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});
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},
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//动态计算字符数
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fontNum(val, limit) {
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let c = 0;
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for (let i = 0; i < val.length; i++) {
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let a = val.charAt(i);
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if (a.match(/[^\x00-\xff]/ig) != null) {
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if (limit) {
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if (c + 2 > limit) {
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return i;
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} else {
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c += 2;
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}
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} else {
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c += 2;
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}
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} else {
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if (limit) {
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if (c + 1 > limit) {
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return i;
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} else {
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c += 1;
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}
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} else {
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c += 1;
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}
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}
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}
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if (!limit) {
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return c;
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}
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},
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rpx2px(rpx) {
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return uni.getWindowInfo().windowWidth * Number(rpx) / 750;
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},
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getH($, isali, callback) {
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if (isali) {
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uni.createSelectorQuery().in().select('#' + $.hid).fields({
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size: true
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}, d => {
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if(d && d.height){
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callback(Number(d.height.toFixed(1)));
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}
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}).exec();
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} else {
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uni.createSelectorQuery().in($).select('#' + $.hid).fields({
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size: true
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}, d => {
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if(d && d.height){
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callback(Number(d.height.toFixed(1)));
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}
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}).exec();
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}
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.t-wrap {
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width: 100%;
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box-sizing: border-box;
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position: relative;
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}
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.t-txt-hide {
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box-sizing: border-box;
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word-break: break-all;
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position: absolute;
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top: 999999px;
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left: 999999px;
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z-index: -1000;
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top: 0rpx;
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width: 100%;
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margin: 0rpx;
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text-align: justify;
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white-space: pre-line;
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line-height: 1.5 !important;
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.t-button {
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float: right;
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clear: both;
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}
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}
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.t-ellipsis {
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text-align: justify;
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box-sizing: border-box;
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width: 100%;
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word-break: break-all;
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position: relative;
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left: 99999px;
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white-space: pre-line;
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line-height: 1.5 !important;
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.t-button {
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float: right;
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clear: both;
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font-weight: 500;
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}
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}
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.t-skeleton {
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width: 100%;
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height: 100%;
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box-sizing: border-box;
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position: absolute;
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top: 0rpx;
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left: 0rpx;
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}
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.skeletons:first-child {
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margin-top: 0rpx !important;
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}
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.skeletons {
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position: relative;
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display: block;
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overflow: hidden;
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width: 100%;
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height: 32rpx;
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margin-top: 12rpx;
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background-color: rgba(0, 0, 0, 0.06);
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box-sizing: border-box;
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}
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.skeletons .empty {
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display: block;
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position: absolute;
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width: 100%;
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height: 100%;
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-webkit-transform: translateX(-100%);
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transform: translateX(-100%);
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background: linear-gradient(90deg, transparent, rgba(216, 216, 216, 0.753), transparent);
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-webkit-animation: loading .8s infinite;
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animation: loading .8s infinite;
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}
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@keyframes loading {
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100% {
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-webkit-transform: translateX(100%);
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transform: translateX(100%);
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}
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}
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</style> |