<template>
<div v-bind="fullScreenParentProps">
<a-icon v-if="fullScreen" class="full-screen-icon" :type="iconType" @click="()=>fullCoder=!fullCoder"/>
<div class="code-editor-cust full-screen-child">
<textarea ref="textarea"></textarea>
<span @click="nullTipClick" class="null-tip" :class="{'null-tip-hidden':hasCode}" :style="nullTipStyle">{{ placeholderShow }}</span>
<template v-if="languageChange">
<a-select v-model="mode" size="small" class="code-mode-select" @change="changeMode" placeholder="请选择主题">
<a-select-option
v-for="mode in modes"
:key="mode.value"
:value="mode.value">
{{ mode.label }}
</a-select-option>
</a-select>
</template>
</div>
</div>
</template>
<script type="text/ecmascript-6">
// 引入全局实例
import _CodeMirror from 'codemirror'
// 核心样式
import 'codemirror/lib/codemirror.css'
// 引入主题后还需要在 options 中指定主题才会生效 darcula gruvbox-dark hopscotch monokai
import 'codemirror/theme/panda-syntax.css'
//提示css
import "codemirror/addon/hint/show-hint.css";
// 需要引入具体的语法高亮库才会有对应的语法高亮效果
// codemirror 官方其实支持通过 /addon/mode/loadmode.js 和 /mode/meta.js 来实现动态加载对应语法高亮库
// 但 vue 貌似没有无法在实例初始化后再动态加载对应 JS ，所以此处才把对应的 JS 提前引入
import 'codemirror/mode/javascript/javascript.js'
import 'codemirror/mode/css/css.js'
import 'codemirror/mode/xml/xml.js'
import 'codemirror/mode/clike/clike.js'
import 'codemirror/mode/markdown/markdown.js'
import 'codemirror/mode/python/python.js'
import 'codemirror/mode/r/r.js'
import 'codemirror/mode/shell/shell.js'
import 'codemirror/mode/sql/sql.js'
import 'codemirror/mode/swift/swift.js'
import 'codemirror/mode/vue/vue.js'
import { isIE11, isIE } from '@/utils/browser'
// 尝试获取全局实例
const CodeMirror = window.CodeMirror || _CodeMirror
export default {
name: 'JCodeEditor',
props: {
// 外部传入的内容，用于实现双向绑定
value: {
type: String,
default: ''
},
// 外部传入的语法类型
language: {
type: String,
default: null
},
languageChange:{
type: Boolean,
default:false,
required:false
},
placeholder: {
type: String,
default: null
},
// 显示行号
lineNumbers: {
type: Boolean,
default: true
},
// 是否显示全屏按钮
fullScreen: {
type: Boolean,
default: false
},
// 全屏以后的z-index
zIndex: {
type: [Number, String],
default: 999
},
// 是否自适应高度，可以传String或Boolean
// 传 String 类型只能写"!ie" ，
// 填写这个字符串，代表其他浏览器自适应高度
// 唯独IE下不自适应高度，因为IE下不支持min、max-height样式
// 如果填写的不是"!ie"就视为true
autoHeight: {
type: [String, Boolean],
default: true
},
// 不自适应高度的情况下生效的固定高度
height: {
type: [String, Number],
default: '240px'
},
},
data () {
return {
// 内部真实的内容
code: '',
iconType: 'fullscreen',
hasCode:false,
// 默认的语法类型
mode: 'javascript',
// 编辑器实例
coder: null,
// 默认配置
options: {
// 缩进格式
tabSize: 2,
// 主题，对应主题库 JS 需要提前引入
theme: 'panda-syntax',
line: true,
// extraKeys: {'Ctrl': 'autocomplete'},//自定义快捷键
hintOptions: {
tables: {
users: ['name', 'score', 'birthDate'],
countries: ['name', 'population', 'size']
}
},
},
// 支持切换的语法高亮类型，对应 JS 已经提前引入
// 使用的是 MIME-TYPE ，不过作为前缀的 text/ 在后面指定时写死了
modes: [{
value: 'css',
label: 'CSS'
}, {
value: 'javascript',
label: 'Javascript'
}, {
value: 'html',
label: 'XML/HTML'
}, {
value: 'x-java',
label: 'Java'
}, {
value: 'x-objectivec',
label: 'Objective-C'
}, {
value: 'x-python',
label: 'Python'
}, {
value: 'x-rsrc',
label: 'R'
}, {
value: 'x-sh',
label: 'Shell'
}, {
value: 'x-sql',
label: 'SQL'
}, {
value: 'x-swift',
label: 'Swift'
}, {
value: 'x-vue',
label: 'Vue'
}, {
value: 'markdown',
label: 'Markdown'
}],
// code 编辑器 是否全屏
fullCoder: false
}
},
watch: {
fullCoder:{
handler(value) {
if(value){
this.iconType="fullscreen-exit"
}else{
this.iconType="fullscreen"
}
}
},
// value: {
// immediate: false,
// handler(value) {
// this._getCoder().then(() => {
// this.coder.setValue(value)
// })
// }
// },
language: {
immediate: true,
handler(language) {
this._getCoder().then(() => {
// 尝试从父容器获取语法类型
if (language) {
// 获取具体的语法类型对象
let modeObj = this._getLanguage(language)
// 判断父容器传入的语法是否被支持
if (modeObj) {
this.mode = modeObj.label
this.coder.setOption('mode', `text/${modeObj.value}`)
}
}
})
}
}
},
computed: {
placeholderShow() {
if (this.placeholder == null) {
return `请在此输入${this.language}代码`
} else {
return this.placeholder
}
},
nullTipStyle(){
if (this.lineNumbers) {
return { left: '36px' }
} else {
return { left: '12px' }
}
},
// coder 配置
coderOptions() {
return {
tabSize: this.options.tabSize,
theme: this.options.theme,
lineNumbers: this.lineNumbers,
line: true,
hintOptions: this.options.hintOptions
}
},
isAutoHeight() {
let {autoHeight} = this
if (typeof autoHeight === 'string' && autoHeight.toLowerCase().trim() === '!ie') {
autoHeight = !(isIE() || isIE11())
} else {
autoHeight = true
}
return autoHeight
},
fullScreenParentProps() {
let props = {
class: {
'full-screen-parent': true,
'full-screen': this.fullCoder,
'auto-height': this.isAutoHeight
},
style: {}
}
if(isIE() || isIE11()){
props.style['height'] = '240px'
}
if (this.fullCoder) {
props.style['z-index'] = this.zIndex
}
if (!this.isAutoHeight) {
props.style['height'] = (typeof this.height === 'number' ? this.height + 'px' : this.height)
}
return props
}
},
mounted () {
// 初始化
this._initialize()
},
methods: {
// 初始化
_initialize () {
// 初始化编辑器实例，传入需要被实例化的文本域对象和默认配置
this.coder = CodeMirror.fromTextArea(this.$refs.textarea, this.coderOptions)
// 编辑器赋值
if(this.value||this.code){
this.hasCode=true
//this.coder.setValue(this.value || this.code)
this.setCodeContent(this.value || this.code)
}else{
this.coder.setValue('')
this.hasCode=false
}
// 支持双向绑定
this.coder.on('change', (coder) => {
this.code = coder.getValue()
if(this.code){
this.hasCode=true
}else{
this.hasCode=false
}
if (this.$emit) {
this.$emit('input', this.code)
}
})
this.coder.on('focus', () => {
this.hasCode=true
})
this.coder.on('blur', () => {
if(this.code){
this.hasCode=true
}else{
this.hasCode=false
}
})
/* this.coder.on('cursorActivity',()=>{
this.coder.showHint()
})*/
},
getCodeContent(){
return this.code
},
setCodeContent(val){
setTimeout(()=>{
if(!val){
this.coder.setValue('')
}else{
this.coder.setValue(val)
}
},300)
},
// 获取当前语法类型
_getLanguage (language) {
// 在支持的语法类型列表中寻找传入的语法类型
return this.modes.find((mode) => {
// 所有的值都忽略大小写，方便比较
let currentLanguage = language.toLowerCase()
let currentLabel = mode.label.toLowerCase()
let currentValue = mode.value.toLowerCase()
// 由于真实值可能不规范，例如 java 的真实值是 x-java ，所以讲 value 和 label 同时和传入语法进行比较
return currentLabel === currentLanguage || currentValue === currentLanguage
})
},
_getCoder() {
let _this = this
return new Promise((resolve) => {
(function get() {
if (_this.coder) {
resolve(_this.coder)
} else {
setTimeout(get, 10)
}
})()
})
},
// 更改模式
changeMode (val) {
// 修改编辑器的语法配置
this.coder.setOption('mode', `text/${val}`)
// 获取修改后的语法
let label = this._getLanguage(val).label.toLowerCase()
// 允许父容器通过以下函数监听当前的语法值
this.$emit('language-change', label)
},
nullTipClick(){
this.coder.focus()
}
}
}
</script>
<style lang="less">
.code-editor-cust{
flex-grow:1;
display:flex;
position:relative;
height:100%;
.CodeMirror{
flex-grow:1;
z-index:1;
.CodeMirror-code{
line-height:19px;
}
}
.code-mode-select{
position:absolute;
z-index:2;
right:10px;
top:10px;
max-width:130px;
}
.CodeMirror{
height: auto;
min-height:100%;
}
.null-tip{
position: absolute;
top: 4px;
left: 36px;
z-index: 10;
color: #ffffffc9;
line-height: initial;
}
.null-tip-hidden{
display: none;
}
}
/* 全屏样式 */
.full-screen-parent {
position: relative;
.full-screen-icon {
opacity: 0;
color: black;
width: 20px;
height: 20px;
line-height: 24px;
background-color: white;
position: absolute;
top: 2px;
right: 2px;
z-index: 9;
cursor: pointer;
transition: opacity 0.3s;
}
&:hover {
.full-screen-icon {
opacity: 1;
&:hover {
background-color: rgba(255, 255, 255, 0.88);
}
}
}
&.full-screen {
position: fixed;
top: 10px;
left: 10px;
width: calc(100% - 20px);
height: calc(100% - 20px);
padding: 10px;
background-color: #f5f5f5;
.full-screen-icon {
top: 12px;
right: 12px;
}
.full-screen-child {
height: 100%;
max-height: 100%;
min-height: 100%;
}
}
.full-screen-child {
height: 100%;
}
&.auto-height {
.full-screen-child {
min-height: 120px;
max-height: 320px;
height: unset;
overflow: hidden;
}
&.full-screen .full-screen-child {
height: 100%;
max-height: 100%;
min-height: 100%;
}
}
}
.CodeMirror-cursor{
height:18.4px !important;
}
</style>