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index.ts
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index.ts
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/**
* @description 编辑区域,入口文件
* @author wangfupeng
*/
import $, { DomElement } from '../utils/dom-core'
import Editor from '../editor/index'
import initEventHooks from './event-hooks/index'
import { UA, throttle } from '../utils/util'
import getChildrenJSON, { NodeListType } from './getChildrenJSON'
import getHtmlByNodeList from './getHtmlByNodeList'
import { EMPTY_P, EMPTY_P_LAST_REGEX, EMPTY_P_REGEX } from '../utils/const'
/** 按键函数 */
type KeyBoardHandler = (event: KeyboardEvent) => unknown
/** 普通事件回调 */
type EventHandler = (event?: Event) => unknown
// 各个事件钩子函数
type TextEventHooks = {
onBlurEvents: EventHandler[]
changeEvents: (() => void)[] // 内容修改时
dropEvents: ((event: DragEvent) => unknown)[]
clickEvents: EventHandler[]
keydownEvents: KeyBoardHandler[]
keyupEvents: KeyBoardHandler[]
/** tab 键(keyCode === )Up 时 */
tabUpEvents: KeyBoardHandler[]
/** tab 键(keyCode === 9)Down 时 */
tabDownEvents: KeyBoardHandler[]
/** enter 键(keyCode === 13)up 时 */
enterUpEvents: KeyBoardHandler[]
/** enter 键(keyCode === 13)down 时 */
enterDownEvents: KeyBoardHandler[]
/** 删除键(keyCode === 8)up 时 */
deleteUpEvents: KeyBoardHandler[]
/** 删除键(keyCode === 8)down 时 */
deleteDownEvents: KeyBoardHandler[]
/** 粘贴事件 */
pasteEvents: ((e: ClipboardEvent) => void)[]
/** 点击链接事件 */
linkClickEvents: ((e: DomElement) => void)[]
/** 点击代码事件 */
codeClickEvents: ((e: DomElement) => void)[]
/** 编辑区域滑动事件 */
textScrollEvents: EventHandler[]
/** 菜单栏被点击 */
toolbarClickEvents: EventHandler[]
/** 图片被点击事件 */
imgClickEvents: ((e: DomElement) => void)[]
/** 图片拖拽MouseDown */
imgDragBarMouseDownEvents: (() => void)[]
/** 表格点击 */
tableClickEvents: ((e: DomElement) => void)[]
/** 每个菜单被点击时,按理说这个不属于 txt 的,先暂时在这放着吧 */
menuClickEvents: (() => void)[]
/** droplist 菜单悬浮事件。暂时放这里 */
dropListMenuHoverEvents: (() => void)[]
/** 点击分割线时 */
splitLineEvents: ((e: DomElement) => void)[]
/** 视频点击事件 */
videoClickEvents: ((e: DomElement) => void)[]
}
class Text {
public editor: Editor
public eventHooks: TextEventHooks // Text 各个事件的钩子函数,如 keyup 时要执行哪些函数
constructor(editor: Editor) {
this.editor = editor
this.eventHooks = {
onBlurEvents: [],
changeEvents: [],
dropEvents: [],
clickEvents: [],
keydownEvents: [],
keyupEvents: [],
tabUpEvents: [],
tabDownEvents: [],
enterUpEvents: [],
enterDownEvents: [],
deleteUpEvents: [],
deleteDownEvents: [],
pasteEvents: [],
linkClickEvents: [],
codeClickEvents: [],
textScrollEvents: [],
toolbarClickEvents: [],
imgClickEvents: [],
imgDragBarMouseDownEvents: [],
tableClickEvents: [],
menuClickEvents: [],
dropListMenuHoverEvents: [],
splitLineEvents: [],
videoClickEvents: [],
}
}
/**
* 初始化
*/
public init(): void {
// 实时保存选取范围
this._saveRange()
// 绑定事件
this._bindEventHooks()
// 初始化 text 事件钩子函数
initEventHooks(this)
}
/**
* 切换placeholder
*/
public togglePlaceholder(): void {
const html = this.html()
const $placeholder = this.editor.$textContainerElem.find('.placeholder')
$placeholder.hide()
if (!html || html === ' ') $placeholder.show()
}
/**
* 清空内容
*/
public clear(): void {
this.html(EMPTY_P)
}
/**
* 设置/获取 html
* @param val html 字符串
*/
public html(val?: string): void | string {
const editor = this.editor
const $textElem = editor.$textElem
// 没有 val ,则是获取 html
if (val == null) {
let html = $textElem.html()
// 未选中任何内容的时候点击“加粗”或者“斜体”等按钮,就得需要一个空的占位符 ​ ,这里替换掉
html = html.replace(/\u200b/gm, '')
// 去掉空行
html = html.replace(/<p><\/p>/gim, '')
// 去掉最后的 空标签
html = html.replace(EMPTY_P_LAST_REGEX, '')
// 为了避免用户在最后生成的EMPTY_P标签中编辑数据, 最后产生多余标签, 去除所有p标签上的data-we-empty-p属性
html = html.replace(EMPTY_P_REGEX, '<p>')
/**
* 这里的代码为了处理火狐多余的空行标签,但是强制删除空行标签会带来其他问题
* html()方法返回的的值,EMPTY_P中pr会被删除,只留下<p>,点不进去,从而产生垃圾数据
* 目前在末位有多个空行的情况下执行撤销重做操作,会产生一种不记录末尾空行的错觉
* 暂时注释, 等待进一步的兼容处理
*/
// html = html.replace(/><br>(?!<)/gi, '>') // 过滤 <p><br>内容</p> 中的br
// html = html.replace(/(?!>)<br></gi, '<') // 过滤 <p>内容<br></p> 中的br
/**
* pre标签格式化
* html()方法理论上应当输出纯净的代码文本,但是对于是否解析html标签还没有良好的判断
* 如果去除hljs的标签,在解析状态下回显,会造成显示错误并且无法再通过hljs方法渲染
* 暂且其弃用
*/
// html = formatCodeHtml(editor, html)
// 将没有自闭和的标签过滤为自闭和
const selfCloseHtmls: RegExpMatchArray | null = html.match(/<(img|br|hr|input)[^>]*>/gi)
if (selfCloseHtmls !== null) {
selfCloseHtmls.forEach(item => {
if (!item.match(/\/>/)) {
html = html.replace(item, item.substring(0, item.length - 1) + '/>')
}
})
}
return html
}
// 有 val ,则是设置 html
val = val.trim()
if (val === '') {
val = EMPTY_P
}
if (val.indexOf('<') !== 0) {
// 内容用 p 标签包裹
val = `<p>${val}</p>`
}
val = val.replace(/\s+</g, '<')
$textElem.html(val)
// 初始化选区,将光标定位到内容尾部
editor.initSelection()
}
/**
* 将json设置成html至编辑器
* @param nodeList json格式
*/
public setJSON(nodeList: NodeListType): void {
const html = getHtmlByNodeList(nodeList).children()
const editor = this.editor
const $textElem = editor.$textElem
// 没有获取到元素的情况
if (!html) return
// 替换文本节点下全部子节点
$textElem.replaceChildAll(html)
}
/**
* 获取 json 格式的数据
*/
public getJSON(): NodeListType {
const editor = this.editor
const $textElem = editor.$textElem
return getChildrenJSON($textElem)
}
/**
* 设置 字符串内容
* @param val text 字符串
*/
public text(val: string): void
/**
* 获取 字符串内容
*/
public text(): string
public text(val?: string): void | string {
const editor = this.editor
const $textElem = editor.$textElem
// 没有 val ,是获取 text
if (val == null) {
let text = $textElem.text()
// 未选中任何内容的时候点击“加粗”或者“斜体”等按钮,就得需要一个空的占位符 ​ ,这里替换掉
text = text.replace(/\u200b/gm, '')
return text
}
// 有 val ,则是设置 text
$textElem.text(`<p>${val}</p>`)
// 初始化选区,将光标定位到内容尾部
editor.initSelection()
}
/**
* 追加 html 内容
* @param html html 字符串
*/
public append(html: string): void {
const editor = this.editor
if (html.indexOf('<') !== 0) {
// 普通字符串,用 <p> 包裹
html = `<p>${html}</p>`
}
this.html(this.html() + html)
// 初始化选区,将光标定位到内容尾部
editor.initSelection()
}
/**
* 每一步操作,都实时保存选区范围
*/
private _saveRange(): void {
const editor = this.editor
const $textElem = editor.$textElem
const $document = $(document)
// 保存当前的选区
function saveRange() {
// 随时保存选区
editor.selection.saveRange()
// 更新按钮 active 状态
editor.menus.changeActive()
}
// 按键后保存
$textElem.on('keyup', saveRange)
// 点击后保存,为了避免被多次执行而导致造成浪费,这里对 click 使用一次性绑定
function onceClickSaveRange() {
saveRange()
$textElem.off('click', onceClickSaveRange)
}
$textElem.on('click', onceClickSaveRange)
function handleMouseUp() {
// 在编辑器区域之外完成抬起,保存此时编辑区内的新选区,取消此时鼠标抬起事件
saveRange()
$document.off('mouseup', handleMouseUp)
}
function listenMouseLeave() {
// 当鼠标移动到外面,要监听鼠标抬起操作
$document.on('mouseup', handleMouseUp)
// 首次移出时即接触leave监听,防止用户不断移入移出多次注册handleMouseUp
$textElem.off('mouseleave', listenMouseLeave)
}
$textElem.on('mousedown', () => {
// mousedown 状态下,要坚听鼠标滑动到编辑区域外面
$textElem.on('mouseleave', listenMouseLeave)
})
$textElem.on('mouseup', (e: MouseEvent) => {
// 记得移除$textElem的mouseleave事件, 避免内存泄露
$textElem.off('mouseleave', listenMouseLeave)
const selection = editor.selection
const range = selection.getRange()
if (range === null) return
saveRange()
})
}
/**
* 绑定事件,事件会触发钩子函数
*/
private _bindEventHooks(): void {
const editor = this.editor
const $textElem = editor.$textElem
const eventHooks = this.eventHooks
// click hooks
$textElem.on('click', (e: Event) => {
const clickEvents = eventHooks.clickEvents
clickEvents.forEach(fn => fn(e))
})
// enter 键 up 时的 hooks
$textElem.on('keyup', (e: KeyboardEvent) => {
if (e.keyCode !== 13) return
const enterUpEvents = eventHooks.enterUpEvents
enterUpEvents.forEach(fn => fn(e))
})
// 键盘 up 时的 hooks
$textElem.on('keyup', (e: KeyboardEvent) => {
const keyupEvents = eventHooks.keyupEvents
keyupEvents.forEach(fn => fn(e))
})
// 键盘 down 时的 hooks
$textElem.on('keydown', (e: KeyboardEvent) => {
const keydownEvents = eventHooks.keydownEvents
keydownEvents.forEach(fn => fn(e))
})
// delete 键 up 时 hooks
$textElem.on('keyup', (e: KeyboardEvent) => {
if (e.keyCode !== 8) return
const deleteUpEvents = eventHooks.deleteUpEvents
deleteUpEvents.forEach(fn => fn(e))
})
// delete 键 down 时 hooks
$textElem.on('keydown', (e: KeyboardEvent) => {
if (e.keyCode !== 8) return
const deleteDownEvents = eventHooks.deleteDownEvents
deleteDownEvents.forEach(fn => fn(e))
})
// 粘贴
$textElem.on('paste', (e: ClipboardEvent) => {
if (UA.isIE()) return // IE 不支持
// 阻止默认行为,使用 execCommand 的粘贴命令
e.preventDefault()
const pasteEvents = eventHooks.pasteEvents
pasteEvents.forEach(fn => fn(e))
})
// 撤销/恢复 快捷键
$textElem.on('keydown', (e: KeyboardEvent) => {
if (
// 编辑器处于聚焦状态下(多编辑器实例) || 当前处于兼容模式(兼容模式撤销/恢复后不聚焦,所以直接过,但会造成多编辑器同时撤销/恢复)
(editor.isFocus || editor.isCompatibleMode) &&
(e.ctrlKey || e.metaKey) &&
e.keyCode === 90
) {
// 取消默认行为
e.preventDefault()
// 执行事件
if (e.shiftKey) {
// 恢复
editor.history.restore()
} else {
// 撤销
editor.history.revoke()
}
}
})
// tab up
$textElem.on('keyup', (e: KeyboardEvent) => {
if (e.keyCode !== 9) return
e.preventDefault()
const tabUpEvents = eventHooks.tabUpEvents
tabUpEvents.forEach(fn => fn(e))
})
// tab down
$textElem.on('keydown', (e: KeyboardEvent) => {
if (e.keyCode !== 9) return
e.preventDefault()
const tabDownEvents = eventHooks.tabDownEvents
tabDownEvents.forEach(fn => fn(e))
})
// 文本编辑区域 滚动时触发
$textElem.on(
'scroll',
// 使用节流
throttle((e: Event) => {
const textScrollEvents = eventHooks.textScrollEvents
textScrollEvents.forEach(fn => fn(e))
}, 100)
)
// 拖拽相关的事件
function preventDefault(e: Event) {
// 禁用 document 拖拽事件
e.preventDefault()
}
$(document)
.on('dragleave', preventDefault)
.on('drop', preventDefault)
.on('dragenter', preventDefault)
.on('dragover', preventDefault)
// 全局事件在编辑器实例销毁的时候进行解绑
editor.beforeDestroy(function () {
$(document)
.off('dragleave', preventDefault)
.off('drop', preventDefault)
.off('dragenter', preventDefault)
.off('dragover', preventDefault)
})
$textElem.on('drop', (e: DragEvent) => {
e.preventDefault()
const events = eventHooks.dropEvents
events.forEach(fn => fn(e))
})
// link click
$textElem.on('click', (e: Event) => {
// 存储链接元素
let $link: DomElement | null = null
const target = e.target as HTMLElement
const $target = $(target)
if ($target.getNodeName() === 'A') {
// 当前点击的就是一个链接
$link = $target
} else {
// 否则,向父节点中寻找链接
const $parent = $target.parentUntil('a')
if ($parent != null) {
// 找到了
$link = $parent
}
}
if (!$link) return // 没有点击链接,则返回
const linkClickEvents = eventHooks.linkClickEvents
linkClickEvents.forEach(fn => fn($link as DomElement))
})
// img click
$textElem.on('click', (e: Event) => {
// 存储图片元素
let $img: DomElement | null = null
const target = e.target as HTMLElement
const $target = $(target)
//处理图片点击 去除掉emoji图片的情况
if ($target.getNodeName() === 'IMG' && !$target.elems[0].getAttribute('data-emoji')) {
// 当前点击的就是img
e.stopPropagation()
$img = $target
}
if (!$img) return // 没有点击图片,则返回
const imgClickEvents = eventHooks.imgClickEvents
imgClickEvents.forEach(fn => fn($img as DomElement))
})
// code click
$textElem.on('click', (e: Event) => {
// 存储代码元素
let $code: DomElement | null = null
const target = e.target as HTMLElement
const $target = $(target)
if ($target.getNodeName() === 'PRE') {
// 当前点击的就是一个链接
$code = $target
} else {
// 否则,向父节点中寻找链接
const $parent = $target.parentUntil('pre')
if ($parent !== null) {
// 找到了
$code = $parent
}
}
if (!$code) return
const codeClickEvents = eventHooks.codeClickEvents
codeClickEvents.forEach(fn => fn($code as DomElement))
})
// splitLine click
$textElem.on('click', (e: Event) => {
// 存储分割线元素
let $splitLine: DomElement | null = null
const target = e.target as HTMLElement
const $target = $(target)
// 判断当前点击元素
if ($target.getNodeName() === 'HR') {
$splitLine = $target
} else {
$target == null
}
if (!$splitLine) return // 没有点击分割线,则返回
// 设置、恢复选区
editor.selection.createRangeByElem($splitLine)
editor.selection.restoreSelection()
const splitLineClickEvents = eventHooks.splitLineEvents
splitLineClickEvents.forEach(fn => fn($splitLine as DomElement))
})
// 菜单栏被点击
editor.$toolbarElem.on('click', (e: Event) => {
const toolbarClickEvents = eventHooks.toolbarClickEvents
toolbarClickEvents.forEach(fn => fn(e))
})
//mousedown事件
editor.$textContainerElem.on('mousedown', (e: MouseEvent) => {
const target = e.target as HTMLElement
const $target = $(target)
if ($target.hasClass('w-e-img-drag-rb')) {
// 点击的元素,是图片拖拽调整大小的 bar
const imgDragBarMouseDownEvents = eventHooks.imgDragBarMouseDownEvents
imgDragBarMouseDownEvents.forEach(fn => fn())
}
})
//table click
$textElem.on('click', (e: Event) => {
// 存储元素
let $dom: DomElement | null = null
const target = e.target as HTMLElement
//获取最祖父元素
$dom = $(target).parentUntilEditor('TABLE', editor, target)
// 没有table范围内,则返回
if (!$dom) return
const tableClickEvents = eventHooks.tableClickEvents
tableClickEvents.forEach(fn => fn($dom as DomElement))
})
// enter 键 down
$textElem.on('keydown', (e: KeyboardEvent) => {
if (e.keyCode !== 13) return
const enterDownEvents = eventHooks.enterDownEvents
enterDownEvents.forEach(fn => fn(e))
})
// 视频 click
$textElem.on('click', (e: Event) => {
// 存储视频
let $video: DomElement | null = null
const target = e.target as HTMLElement
const $target = $(target)
//处理视频点击 简单的video 标签
if ($target.getNodeName() === 'VIDEO') {
// 当前点击的就是视频
e.stopPropagation()
$video = $target
}
if (!$video) return // 没有点击视频,则返回
const videoClickEvents = eventHooks.videoClickEvents
videoClickEvents.forEach(fn => fn($video as DomElement))
})
}
}
export default Text