wangeditor
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wangEditor - 轻量级 web 富文本编辑器,配置方便,使用简单,开源免费
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text/typescript
/**
* @description 删除时保留 EMPTY_P
* @author wangfupeng
*/
import { EMPTY_P } from '../../utils/const'
import Editor from '../../editor/index'
import $ from '../../utils/dom-core'
/**
* 删除时保留 EMPTY_P
* @param editor 编辑器实例
* @param deleteUpEvents delete 键 up 时的 hooks
* @param deleteDownEvents delete 建 down 时的 hooks
*/
function deleteToKeepP(editor: Editor, deleteUpEvents: Function[], deleteDownEvents: Function[]) {
function upFn() {
const $textElem = editor.$textElem
// 编辑器中的字符是""或空白,说明内容为空
if (/^\s*$/.test(editor.$textElem.text())) {
// 内容空了
const $p = $(EMPTY_P)
$textElem.html(' ') // 一定要先清空,否则在 firefox 下有问题
$textElem.append($p)
editor.selection.createRangeByElem($p, false, true)
editor.selection.restoreSelection()
// 设置折叠后的光标位置,在firebox等浏览器下
// 光标设置在end位置会自动换行
editor.selection.moveCursor($p.getNode(), 0)
}
}
deleteUpEvents.push(upFn)
function downFn(e: Event) {
const $textElem = editor.$textElem
const txtHtml = $textElem.html().toLowerCase().trim()
if (txtHtml === EMPTY_P) {
// 最后剩下一个空行,就不再删除了
e.preventDefault()
return
}
}
deleteDownEvents.push(downFn)
}
/**
* 剪切时保留 EMPTY_P
* @param editor 编辑器实例
* @param cutEvents keydown hooks
*/
export function cutToKeepP(editor: Editor, cutEvents: Function[]) {
function upFn(e: KeyboardEvent) {
if (e.keyCode !== 88) {
return
}
const $textElem = editor.$textElem
const txtHtml = $textElem.html().toLowerCase().trim()
// firefox 时用 txtHtml === '<br>' 判断,其他用 !txtHtml 判断
if (!txtHtml || txtHtml === '<br>') {
// 内容空了
const $p = $(EMPTY_P)
$textElem.html(' ') // 一定要先清空,否则在 firefox 下有问题
$textElem.append($p)
editor.selection.createRangeByElem($p, false, true)
editor.selection.restoreSelection()
// 设置折叠后的光标位置,在firebox等浏览器下
// 光标设置在end位置会自动换行
editor.selection.moveCursor($p.getNode(), 0)
}
}
cutEvents.push(upFn)
}
export default deleteToKeepP