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626 lines
24 KiB
JavaScript
626 lines
24 KiB
JavaScript
layui.define(['jquery'], function(exports) {
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"use strict";
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var $ = layui.$,
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MOD_NAME = 'laymd',
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JS_PATH;
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//获取JS所在路径
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if (document.currentScript) {
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JS_PATH = document.currentScript.src;
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} else {
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var js = document.scripts, last = js.length - 1, src;
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for(var i = last; i > 0; i--){
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if(js[i].readyState === 'interactive'){
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src = js[i].src;
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break;
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}
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}
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JS_PATH = src || js[last].src;
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}
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JS_PATH = JS_PATH.substring(0, JS_PATH.lastIndexOf('/') + 1);
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//加载CSS
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layui.link(JS_PATH + 'laymd.css');
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//实例化
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var MD = function (id, options) {
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//默认配置项
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var config = {
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tools: [
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'bold', 'italic', 'underline', 'del',
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'|',
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'left', 'center', 'right',
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'|',
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'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
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'|',
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'hr', 'link', 'code', 'ol', 'ul', 'tl',
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'|',
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'table', 'quote', 'toc', 'img',
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'|',
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'full', 'preview'
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],
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height: 280
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};
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//合并配置项
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config = $.extend({}, config, options);
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//相关元素
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var EL = {}, THIS = this;
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//获取编辑器容器
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EL.$div = $(typeof(id) === 'string' ? '#' + id : id).addClass('layui-laymd');
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//获取默认值
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var initValue = EL.$div.text();
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//设置要显示的工具
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var toolBar = [];
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layui.each(config.tools, function(index, item){
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tools[item] && toolBar.push(tools[item]);
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});
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//载入元素
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EL.$div.html([
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'<div class="layui-unselect layui-laymd-tool">' + toolBar.join('') + '</div>',
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'<div class="layui-laymd-area">',
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'<textarea spellcheck="false"></textarea>',
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'<iframe></iframe>',
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'</div>',
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'</div>'
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].join(''));
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//设置编辑框和预览框
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EL.$body = $('body');
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EL.$div.find('.layui-laymd-area').height(config.height);
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EL.$div.find('textarea').attr('id', EL.$div.attr('name') || EL.$div.prop('id'))
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EL.$textArea = EL.$div.find('textarea').attr('name', EL.$div.attr('name') || EL.$div.prop('id')).val(initValue);
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EL.$iframe = EL.$div.find('iframe');
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//设置预览默认样式
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EL.$iframe.contents().find('head').append('<link rel="stylesheet" href="' + JS_PATH + 'preview.css' + '">');
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//获取DOM
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var textArea = EL.$textArea[0];
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//==============================================================================================================
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//绑定按键事件
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EL.$textArea.on('keydown', function (e) {
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if (e.ctrlKey) {
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if (e.shiftKey && e.keyCode === 90) { //ctrl + shift + z
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actions.redo.call(THIS, e, this, EL);
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} else if (keyMap[e.keyCode]) {
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e.preventDefault();
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actions[keyMap[e.keyCode]].call(THIS, e, this, EL);
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}
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} else {
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if (e.keyCode === 9) { //tab
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e.preventDefault();
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actions.tab.call(THIS, e, this, EL);
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}
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}
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});
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//绑定按钮事件
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EL.$textArea.on('keyup', function (e) {
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if (e.keyCode === 13) {
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e.preventDefault();
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actions.enter.call(THIS, e, this, EL);
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}
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});
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//滚动事件
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EL.$textArea.scroll(function () {
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var ifrBody = EL.$iframe.contents().find('body')[0];
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if (ifrBody.scrollHeight > EL.$iframe.height()) {
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var p = (ifrBody.scrollHeight - EL.$iframe.height()) / (textArea.scrollHeight - EL.$textArea.outerHeight());
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EL.$iframe[0].contentWindow.scroll(0, this.scrollTop * p);
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}
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});
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//输入法输入事件
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var composition = false, preText, sufText;
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EL.$textArea.on('input', function (e) {
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composition || actions.input.call(THIS, e, this, EL);
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}).on('compositionstart', function (e) {
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preText = this.value;
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composition = true;
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}).on('compositionend', function (e) {
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composition = false;
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sufText = this.value;
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preText === sufText || actions.input.call(THIS, e, this, EL);
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});
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//工具栏事件
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EL.$div.find('.layui-laymd-tool > i').on('click', function (e) {
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actions[$(this).attr('laymd-event')].call(THIS, e, this, EL);
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});
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//==============================================================================================================
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//事件绑定
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this.on = function (event, callback) {
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layui.onevent.call(this, MOD_NAME, MOD_NAME + '(' + event + ')', callback);
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};
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//执行某个动作
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this.do = function (action, event, element, params) {
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actions[action] && actions[action].call(THIS, event, element, EL, params);
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};
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//定时存储操作记录
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setInterval(function () {
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THIS.history.undo(true);
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}, 1500);
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//操作记录
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this.history = {
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_undo: [textArea.value],
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_redo: [],
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undo: function (record) {
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if (record) {
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var text = textArea.value;
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if (this._undo[this._undo.length - 1] === text) {
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return false;
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} else {
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this._undo.push(text);
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this._undo.length > 500 && this._undo.shift();
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}
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} else {
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this.undo(true);
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if (this._undo.length > 1) {
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this._redo.push(this._undo.pop());
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textArea.value = this._undo[this._undo.length - 1];
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actions.change.call(THIS, null, null, EL);
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}
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}
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},
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redo: function (flush) {
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if (flush && this._redo.length) {
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this._redo = [];
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} else {
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if (this._redo.length > 0) {
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textArea.value = this._redo.pop();
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this.undo(true);
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actions.change.call(THIS, null, null, EL);
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}
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}
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}
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};
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//==============================================================================================================
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/**
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* 获取选中位置
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* @returns {{start: number, end: number, text: string}}
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*/
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this.getRangeData = function () {
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textArea.focus();
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return {
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start: textArea.selectionStart,
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end: textArea.selectionEnd,
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text: textArea.value.substring(textArea.selectionStart, textArea.selectionEnd)
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};
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};
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/**
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* 替换选中数据
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* @param rangeData {{start: *|number, end: *|number, text: *|string}}
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*/
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this.setRangeData = function (rangeData) {
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textArea.focus();
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if (typeof rangeData.text === 'string') {
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var value = textArea.value;
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if (textArea.setRangeText) {
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textArea.setRangeText(rangeData.text);
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} else {
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var range = this.getRangeData(),
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pre = value.substring(0, range.start),
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suf = value.substring(range.end);
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textArea.value = pre + rangeData.text + suf;
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textArea.selectionStart = range.start;
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textArea.selectionEnd = range.start + rangeData.text.length;
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}
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value === textArea.value || EL.$textArea.trigger('input');
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}
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if (typeof rangeData.start === 'number') {
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textArea.selectionStart = rangeData.start;
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}
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if (typeof rangeData.end === 'number') {
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textArea.selectionEnd = rangeData.end;
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}
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};
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/**
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* 获取选中文本
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* @returns {string}
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*/
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this.getRangeText = function () {
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return this.getRangeData().text;
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};
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/**
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* 设置选中文本
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* @param text
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*/
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this.setRangeText = function (text) {
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this.setRangeData({text: text});
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};
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/**
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* 获取光标所在行的数据
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* @param line
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* @returns {{start: number, end: number, line: number, text: string}}
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*/
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this.getLineData = function (line) {
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textArea.focus();
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var lineData = {},
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text = textArea.value,
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lines = text.split("\n");
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lineData.start = 0;
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lineData.line = typeof line === 'number' ? line : text.substring(0, textArea.selectionEnd).split("\n").length - 1;
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lineData.text = lines[lineData.line] || '';
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for (var i = 0; i < lineData.line; i++) {
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lineData.start += lines[i].length + 1;
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}
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lineData.end = lineData.start + lineData.text.length;
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return lineData;
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};
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/**
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* 设置光标所在行的数据
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* @param lineData {{start: *|number, end: *|number, line: *|number, text: *|string}}
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*/
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this.setLineData = function (lineData) {
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textArea.focus();
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if (typeof lineData.text === 'string') {
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var line = this.getLineData(lineData.line),
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value = textArea.value,
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pre = value.substring(0, line.start),
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suf = value.substring(line.end);
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textArea.value = pre + lineData.text + suf;
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textArea.selectionStart = textArea.selectionEnd = line.start + lineData.text.length;
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value === textArea.value || EL.$textArea.trigger('input');
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}
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if (typeof lineData.start === 'number') {
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textArea.selectionStart = lineData.start;
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}
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if (typeof lineData.end === 'number') {
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textArea.selectionEnd = lineData.end;
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}
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};
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/**
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* 获取光标所在行的文本
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* @returns {string}
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*/
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this.getLineText = function (line) {
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return this.getLineData({line: line}).text;
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};
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/**
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* 设置光标所在行的文本
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* @param text
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* @param line
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*/
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this.setLineText = function (text, line) {
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this.setLineData({text: text, line: line});
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};
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//==============================================================================================================
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//获取编辑器的文本
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this.getText = function () {
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return textArea.value;
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};
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//设置预览HTML
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this.setPreview = function (html) {
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EL.$iframe.contents().find('body').html(html);
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};
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//设置超链接
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this.setLink = function (link, text, title) {
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actions.link.call(THIS, null, null, EL, {
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link: link,
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text: text,
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title: title
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});
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};
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//设置图片
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this.setImg = function (src, alt, title) {
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actions.img.call(THIS, null, null, EL, {
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src: src,
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alt: alt,
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title: title
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});
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};
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};
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//所有工具
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var tools = {
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bold: '<i class="laymd-tool-b" title="加粗" laymd-event="bold">B</i>',
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italic: '<i class="laymd-tool-i" title="斜体" laymd-event="italic">I</i>',
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underline: '<i class="laymd-tool-u" title="下划线" laymd-event="underline">U</i>',
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del: '<i class="laymd-tool-d" title="删除线" laymd-event="del">D</i>',
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'|': '<span></span>',
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h1: '<i class="laymd-tool-h1" title="h1" laymd-event="h1">h1</i>',
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h2: '<i class="laymd-tool-h2" title="h2" laymd-event="h2">h2</i>',
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h3: '<i class="laymd-tool-h3" title="h3" laymd-event="h3">h3</i>',
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h4: '<i class="laymd-tool-h4" title="h4" laymd-event="h4">h4</i>',
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h5: '<i class="laymd-tool-h5" title="h5" laymd-event="h5">h5</i>',
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h6: '<i class="laymd-tool-h6" title="h6" laymd-event="h6">h6</i>',
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hr: '<i class="laymd-tool-hr" title="换行符" laymd-event="hr">—</i>',
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link: '<i class="laymd-tool-link" title="超链接" laymd-event="link">A</i>',
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code: '<i class="laymd-tool-code" title="代码" laymd-event="code">/</i>',
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ol: '<i class="laymd-tool-ol" title="有序列表" laymd-event="ol">ol</i>',
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ul: '<i class="laymd-tool-ul" title="无序列表" laymd-event="ul">ul</i>',
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tl: '<i class="laymd-tool-tl" title="任务列表" laymd-event="tl">tl</i>',
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table: '<i class="laymd-tool-table" title="表格" laymd-event="table">T</i>',
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quote: '<i class="laymd-tool-quote" title="引用" laymd-event="quote">Q</i>',
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toc: '<i class="laymd-tool-toc" title="导航" laymd-event="toc">TOC</i>',
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left: '<i class="laymd-tool-left" title="居左" laymd-event="left">L</i>',
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center: '<i class="laymd-tool-center" title="居中" laymd-event="center">C</i>',
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right: '<i class="laymd-tool-right" title="居右" laymd-event="right">R</i>',
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img: '<i class="laymd-tool-img" title="图片" laymd-event="img">IMG</i>',
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full: '<i class="laymd-tool-full" title="全屏" laymd-event="full">↗</i>',
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preview: '<i class="laymd-tool-preview" title="预览" laymd-event="preview">√</i>'
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};
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//热键数组
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var keyMap = [];
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keyMap[66] = 'bold'; //ctrl + b
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keyMap[73] = 'italic'; //ctrl + i
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keyMap[85] = 'underline'; //ctrl + u
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keyMap[68] = 'del'; //ctrl + d
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keyMap[37] = 'left'; //ctrl + ←
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keyMap[38] = 'center'; //ctrl + ↑
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keyMap[39] = 'right'; //ctrl + →
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keyMap[49] = 'h1'; //ctrl + 1
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keyMap[50] = 'h2'; //ctrl + 2
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keyMap[51] = 'h3'; //ctrl + 3
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keyMap[52] = 'h4'; //ctrl + 4
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keyMap[53] = 'h5'; //ctrl + 5
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keyMap[54] = 'h6'; //ctrl + 6
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keyMap[189] = 'hr'; //ctrl + -
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keyMap[76] = 'link'; //ctrl + l
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keyMap[191] = 'code'; //ctrl + /
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keyMap[81] = 'quote'; //ctrl + q
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keyMap[89] = 'redo'; //ctrl + y
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keyMap[90] = 'undo'; //ctrl + z
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//事件列表
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var actions = {
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bold: function (event, element, EL, params) {
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var range = this.getRangeData();
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this.setRangeData({
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text: '**' + range.text + '**',
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start: range.end + 2,
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end: range.end + 2
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});
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},
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italic: function (event, element, EL, params) {
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var range = this.getRangeData();
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this.setRangeData({
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text: '*' + range.text + '*',
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start: range.end + 1,
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end: range.end + 1
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});
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},
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underline: function (event, element, EL, params) {
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var range = this.getRangeData();
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this.setRangeData({
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text: '++' + range.text + '++',
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start: range.end + 2,
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end: range.end + 2
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});
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},
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del: function (event, element, EL, params) {
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var range = this.getRangeData();
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this.setRangeData({
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text: '~~' + range.text + '~~',
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start: range.end + 2,
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end: range.end + 2
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});
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},
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left: function (event, element, EL, params) {
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this.setLineText(this.getLineText().replace(/^ *(:-:|--:) /, ''));
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},
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center: function (event, element, EL, params) {
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this.setLineText(':-: ' + this.getLineText().replace(/ *(^:-:|--:) /, ''));
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},
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right: function (event, element, EL, params) {
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this.setLineText('--: ' + this.getLineText().replace(/^ *(:-:|--:) /, ''));
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},
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h1: function (event, element, EL, params) {
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this.setLineText('# ' + this.getLineText().replace(/^ *#+ /, ''));
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},
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h2: function (event, element, EL, params) {
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this.setLineText('## ' + this.getLineText().replace(/^ *#+ /, ''));
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},
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h3: function (event, element, EL, params) {
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this.setLineText('### ' + this.getLineText().replace(/^ *#+ /, ''));
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},
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h4: function (event, element, EL, params) {
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this.setLineText('#### ' + this.getLineText().replace(/^ *#+ /, ''));
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},
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h5: function (event, element, EL, params) {
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this.setLineText('##### ' + this.getLineText().replace(/^ *#+ /, ''));
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},
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h6: function (event, element, EL, params) {
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this.setLineText('###### ' + this.getLineText().replace(/^ *#+ /, ''));
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},
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hr: function (event, element, EL, params) {
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var range = this.getRangeData();
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this.setRangeData({
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text: "\n---\n",
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start: range.start + 5,
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end: range.start + 5
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});
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},
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link: function (event, element, EL, params) {
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var range = this.getRangeData();
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if (params) {
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var text = params.text || range.text || params.link,
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title = params.title || text || '',
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link = '[' + text + '](' + params.link + (title ? (' "' + title + '"') : '') + ')';
|
|
this.setRangeData({
|
|
text: link,
|
|
start: range.start + link.length,
|
|
end: range.start + link.length
|
|
});
|
|
} else {
|
|
var textLen = range.text.length,
|
|
text = textLen ? range.text : 'text',
|
|
title = textLen ? range.text : 'title';
|
|
this.setRangeData({
|
|
text: '[' + text + '](http://link-address "' + title + '")',
|
|
start: textLen ? (range.start + textLen + 3) : (range.start + 1),
|
|
end: textLen ? (range.start + textLen + 22) : (range.start + 5),
|
|
});
|
|
}
|
|
},
|
|
code: function (event, element, EL, params) {
|
|
var range = this.getRangeData(),
|
|
line = this.getLineData();
|
|
if (range.text || line.text) {
|
|
this.setRangeData({
|
|
text: '`' + range.text + '`',
|
|
start: range.end + 1,
|
|
end: range.end + 1
|
|
});
|
|
} else {
|
|
this.setLineData({
|
|
text: '```\n\n```',
|
|
start: line.start + 4,
|
|
end: line.start + 4
|
|
});
|
|
}
|
|
},
|
|
ol: function (event, element, EL, params) {
|
|
this.setLineText(this.getLineText().replace(/^( *)(?:(?:(?:\d+\.)|(?:-(?: \[[ x]])?)) )?(.*)/, '$11. $2'));
|
|
},
|
|
ul: function (event, element, EL, params) {
|
|
this.setLineText(this.getLineText().replace(/^( *)(?:(?:(?:\d+\.)|(?:-(?: \[[ x]])?)) )?(.*)/, '$1- $2'));
|
|
},
|
|
tl: function (event, element, EL, params) {
|
|
this.setLineText(this.getLineText().replace(/^( *)(?:(?:(?:\d+\.)|(?:-(?: \[[ x]])?)) )?(.*)/, '$1- [ ] $2'));
|
|
},
|
|
enter: function (event, element, EL, params) {
|
|
var line = this.getLineData(),
|
|
preLine = this.getLineData(line.line - 1);
|
|
var match = /^( *)((?:(?:\d+\.)|(?:-(?: \[[ x]])?)) )?(.*)/.exec(preLine.text);
|
|
if (match[2]) {
|
|
if (match[3] === '') {
|
|
this.setLineText('', preLine.line);
|
|
this.setLineText('', line.line);
|
|
} else if (match[2].length === 3) {
|
|
var m = /^(\d+)\. /.exec(match[2]);
|
|
this.setLineText(match[1] + (parseInt(m[1]) + 1) + '. ' + line.text);
|
|
} else {
|
|
this.setLineText(match[1] + match[2] + line.text);
|
|
}
|
|
}
|
|
},
|
|
table: function (event, element, EL, params) {
|
|
var range = this.getRangeData(),
|
|
table = [
|
|
this.getLineText() ? '\n' : '',
|
|
'header 1 | header 2',
|
|
'--- | ---',
|
|
'row 1 col 1 | row 1 col 2',
|
|
'row 2 col 1 | row 2 col 2',
|
|
'\n'
|
|
].join("\n");
|
|
this.setRangeData({
|
|
text: table,
|
|
start: range.start + table.length,
|
|
end: range.start + table.length
|
|
});
|
|
},
|
|
quote: function (event, element, EL, params) {
|
|
this.setLineText('> ' + this.getLineText().replace(/^ *> /, ''));
|
|
},
|
|
toc: function (event, element, EL, params) {
|
|
var range = this.getRangeData();
|
|
this.setRangeData({
|
|
text: '\n[TOC]\n',
|
|
start: range.start + 7,
|
|
end: range.start + 7
|
|
});
|
|
},
|
|
img: function (event, element, EL, params) {
|
|
var range = this.getRangeData();
|
|
if (params) {
|
|
var alt = params.alt || range.text || params.title || params.src,
|
|
title = params.title || alt || '',
|
|
src = '[' + alt + '](' + params.src + (title ? (' "' + title + '"') : '') + ')';
|
|
this.setRangeData({
|
|
text: src,
|
|
start: range.start + src.length,
|
|
end: range.start + src.length
|
|
});
|
|
} else {
|
|
var textLen = range.text.length,
|
|
alt = textLen ? range.text : 'alt',
|
|
title = textLen ? range.text : 'title';
|
|
this.setRangeData({
|
|
text: '',
|
|
start: textLen ? (range.start + textLen + 4) : (range.start + 2),
|
|
end: textLen ? (range.start + textLen + 23) : (range.start + 5),
|
|
});
|
|
}
|
|
},
|
|
tab: function (event, element, EL, params) {
|
|
var range = this.getRangeData();
|
|
this.setRangeData({text: ' ', start: range.start + 4, end: range.start + 4});
|
|
},
|
|
input: function (event, element, EL, params) {
|
|
this.history.redo(true);
|
|
actions.change.call(this, event, element, EL, params);
|
|
},
|
|
redo: function (event, element, EL, params) {
|
|
this.history.redo(params);
|
|
},
|
|
undo: function (event, element, EL, params) {
|
|
this.history.undo(params);
|
|
},
|
|
change: function (event, element, EL, params) {
|
|
layui.event.call(this, MOD_NAME, MOD_NAME + '(change)');
|
|
},
|
|
full: function (event, element, EL, params) {
|
|
if (EL.$div.hasClass('layui-laymd-full')) {
|
|
EL.$div.removeClass('layui-laymd-full');
|
|
element && $(element).text('↗');
|
|
EL.$div.find('i.laymd-tool-preview').show();
|
|
EL.$body.removeAttr('style');
|
|
} else {
|
|
EL.$div.addClass('layui-laymd-full');
|
|
element && $(element).text('↙');
|
|
EL.$div.find('i.laymd-tool-preview').hide();
|
|
EL.$body.attr('style', 'overflow: hidden;');
|
|
}
|
|
},
|
|
preview: function (event, element, EL, params) {
|
|
if (EL.$iframe.is(':visible')) {
|
|
EL.$iframe.hide();
|
|
element && $(element).removeClass('select');
|
|
} else {
|
|
EL.$iframe.show();
|
|
element && $(element).addClass('select');
|
|
}
|
|
}
|
|
};
|
|
|
|
exports(MOD_NAME, {
|
|
init: function (id, options) {
|
|
return new MD(id, options);
|
|
}
|
|
});
|
|
});
|