编辑器reactcodemirror2的封装组件简单使用

1、下载安装

npm install react-codemirror2 codemirror --save

2、引入

//引入Codemirror组件
import Cm from './extendCodeMirror.js';
import { UnControlled as CodeMirror } from 'react-codemirror2';

  //样式

  import 'codemirror/lib/codemirror.css';
  import 'codemirror/lib/codemirror.js';






  import 'codemirror/theme/dracula.css';   //主题
 
　　//代码折叠
 
  import 'codemirror/addon/fold/foldgutter.css';
  import 'codemirror/addon/lint/lint.css';
  import 'codemirror/addon/fold/foldcode.js';
  import 'codemirror/addon/fold/foldgutter.js';
  import 'codemirror/addon/fold/brace-fold.js';
  import 'codemirror/addon/hint/javascript-hint.js';
  import 'codemirror/addon/hint/show-hint.js';
  import 'codemirror/addon/lint/lint.js';
  import 'codemirror/addon/lint/json-lint.js';
  import 'codemirror/addon/lint/javascript-lint.js';
  import 'codemirror/addon/display/placeholder.js';
  import 'codemirror/mode/javascript/javascript.js';
 
  import 'codemirror/mode/sql/sql.js';
 
 
　　很多属性配置，需要将对应文件引入才生效
 
 
 
//详细信息配置可以查看：https://codemirror.net，我这里用的是json/js/sql ，
//https://www.tun6.com/projects/code_mirror//  这里的也很全面
   

   

import React, { useState, useEffect, useRef, useCallback } from 'react';
import { connect } from 'dva';
import { Form, Input, Button } from 'antd';
import styles from './style.less';
import Cm from './extendCodeMirror.js';
import { UnControlled as CodeMirror } from 'react-codemirror2';

// import * as sqlFormatter from 'sql-formatter';

import 'codemirror/lib/codemirror.css';
import 'codemirror/lib/codemirror.js';

import 'codemirror/theme/dracula.css';
import 'codemirror/addon/fold/foldgutter.css';

import 'codemirror/addon/lint/lint.css';
import 'codemirror/addon/fold/foldcode.js';
import 'codemirror/addon/fold/foldgutter.js';
import 'codemirror/addon/fold/brace-fold.js';
import 'codemirror/addon/hint/javascript-hint.js';
import 'codemirror/addon/hint/show-hint.js';
import 'codemirror/addon/lint/lint.js';
import 'codemirror/addon/lint/json-lint.js';
import 'codemirror/addon/lint/javascript-lint.js';
import 'codemirror/addon/display/placeholder.js';
import 'codemirror/mode/javascript/javascript.js';
import 'codemirror/mode/sql/sql.js';

const sqlFormatter = require('sql-formatter');

const Editors = (props) => {
  const { dispatch, title, type, editorList, rules, editorListErr } = props;

  const [editorVal, sEditorVal] = useState('');
  const formRefs = useRef(null);
  const [editorBorder, sEditorBorder] = useState('none');
  // let editor = null;

  useEffect(() => {
    if (formRefs.current) {
      // console.log(editorList,title+'title')
      editorList.map((val) => {
        if (val.name == title) {
          if (editorVal != val.value) {
            sEditorVal(val.value);
          }
        }
      });
    }
  }, [editorList]);

  useEffect(() => {
    //点击按钮校验
    if (editorListErr && editorListErr != 1) {
      takeEditorValue();
    }
  }, [editorListErr]);

  const onEditorDidMount = (editors) => {
    // editor.setSize('width', 'height'); // 设置编辑器宽高
    // 绑定其他快捷键, 这里以按下ctrl-1 格式化编辑器代码做示例
    // editor.addKeyMap({
    //   F1: autoFormatSelection(),
    // });
  };
//格式化
  const autoFormatSelection = () => {
    let editor = formRefs.current.editor;
    if (props.type != 'sql') {
      // console.log(editor, 1);
      const script_length = editor.getValue().length;
      const startPos = { line: 0, ch: 0, sticky: null };
      const endPos = editor.doc.posFromIndex(script_length);
      editor.setSelection(startPos, endPos);
      editor.autoFormatRange(startPos, endPos);
      editor.commentRange(false, startPos, endPos);
    } else {
      let splCont = '';
      splCont = editor.getValue();
      editor.setValue(sqlFormatter.format(splCont));
    }
  };
//失焦点保存
  const takeEditorValue = () => {
    let text = formRefs.current ? formRefs.current.editor.getValue() || '' : '';
    // console.log(editorList,'editortexttexttexttextList')
    rules && !text ? sEditorBorder('1px solid red') : sEditorBorder('none');
    props.getEditorList(
      {
        name: title,
        value: text,
      },
      editorList
    );
  };

  // console.log(props.type);
  return (
    <div className={styles.editors} style={{ border: editorBorder }} key={props.title + 'editors'}>
      <CodeMirror
        className={styles.editorsDom}
        ref={formRefs}
        key={props.title}
        editorDidMount={onEditorDidMount}
        value={editorVal}
        options={{
          lineNumbers: true,
          mode: { name: props.type == 'sql' ? 'text/x-sql' : 'application/json' },
          extraKeys: { Ctrl: autoFormatSelection },
          autofocus: false,
          styleActiveLine: true,
          theme: 'dracula',
          lineWrapping: true,
          foldGutter: true,
          gutters: ['CodeMirror-linenumbers', 'CodeMirror-foldgutter'],
          lint: false,
          indentUnit: 2,
          cursorHeight: 0.85,
          placeholder: props.placeholder || '',
        }}
        onBlur={() => {
          takeEditorValue();   //失去焦点保存
        }}
      />
      {editorBorder != 'none' ? (
        <div
          className={styles.editorsErrTxext}
          key={props.title + 'editorsErrTxext'}
          style={{ display: 'flex', justifyContent: 'flex-start', alignItems: 'center', color: '#f5222d' }}
        >
          {props.placeholder}
        </div>
      ) : (
        ''
      )}
    </div>
  );
};

export default Editors;

算了，直接贴代码吧，不想写了，只是想打断一下将近两年没来的记录

.editors{
     100%;
    height: 100%;
    position: relative;
    
    .editorsDom{
        font-size: 16px;
        line-height: 26px;
        // border: 1px solid #e8e8e8;
    }
    .editorsErrTxext{
        position: absolute;
        left: 0;
        bottom: -24px;
        clear: both;
        min-height: 24px;
        margin-top: -2px;
        color: rgba(0, 0, 0, 0.45);
        font-size: 15px;
        line-height: 1.5;
        transition: color 0.3s cubic-bezier(0.215, 0.61, 0.355, 1)
    }
    :global(.CodeMirror) {
        min-height: 218px !important;
        height: auto !important;
        max-height: 747px !important;
    }
    :global(.CodeMirror-scroll) {
        min-height: 218px !important;
        height: auto !important;
        max-height: 747px !important;
    }

    :global(.CodeMirror-gutter-wrapper) {
        left: -40px !important;
    }
}

嗯。。。样式。。。

 嗯。。。效果

这个是封装的组件，好了，就这吧。

extendCodeMirror.js文件，我优化了一下

// extendCodeMirror.js
/* eslint-disable */
import * as CodeMirror from 'codemirror';

CodeMirror.extendMode("css", {
commentStart: "/*",
commentEnd: "*/",
newlineAfterToken: function(type, content) {
  return /^[;{}]$/.test(content);
}
});

CodeMirror.extendMode("javascript", {
commentStart: "/*",
commentEnd: "*/",
// FIXME semicolons inside of for
newlineAfterToken: function(type, content, textAfter, state) {
  if (this.jsonMode) {
    return /^[\[,{]$/.test(content) || /^}/.test(textAfter)|| /^]/.test(textAfter);
  } else {
    if (content == ";" && state.lexical && state.lexical.type == ")") return false;
    return /^[;{}]$/.test(content) && !/^;/.test(textAfter);
  }
}
});

CodeMirror.extendMode("xml", {
commentStart: "<!--",
commentEnd: "-->",
newlineAfterToken: function(type, content, textAfter) {
  return type == "tag" && />$/.test(content) || /^</.test(textAfter);
}
});

// Comment/uncomment the specified range
CodeMirror.defineExtension("commentRange", function (isComment, from, to) {
var cm = this, curMode = CodeMirror.innerMode(cm.getMode(), cm.getTokenAt(from).state).mode;
cm.operation(function() {
  if (isComment) { // Comment range
    cm.replaceRange(curMode.commentEnd, to);
    cm.replaceRange(curMode.commentStart, from);
    if (from.line == to.line && from.ch == to.ch) // An empty comment inserted - put cursor inside
      cm.setCursor(from.line, from.ch + curMode.commentStart.length);
  } else { // Uncomment range
    var selText = cm.getRange(from, to);
    var startIndex = selText.indexOf(curMode.commentStart);
    var endIndex = selText.lastIndexOf(curMode.commentEnd);
    if (startIndex > -1 && endIndex > -1 && endIndex > startIndex) {
      // Take string till comment start
      selText = selText.substr(0, startIndex)
      // From comment start till comment end
        + selText.substring(startIndex + curMode.commentStart.length, endIndex)
      // From comment end till string end
        + selText.substr(endIndex + curMode.commentEnd.length);
    }
    cm.replaceRange(selText, from, to);
  }
});
});

// Applies automatic mode-aware indentation to the specified range
CodeMirror.defineExtension("autoIndentRange", function (from, to) {
var cmInstance = this;
this.operation(function () {
  for (var i = from.line; i <= to.line; i++) {
    cmInstance.indentLine(i, "smart");
  }
});
});

// Applies automatic formatting to the specified range
CodeMirror.defineExtension("autoFormatRange", function (from, to) {
var cm = this;
var outer = cm.getMode(), text = cm.getRange(from, to).split("\n");
var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
var tabSize = cm.getOption("tabSize");

var out = "", lines = 0, atSol = from.ch == 0;
function newline() {
  out += "\n";
  atSol = true;
  ++lines;
}

for (var i = 0; i < text.length; ++i) {
  var stream = new CodeMirror.StringStream(text[i], tabSize);
  while (!stream.eol()) {
    var inner = CodeMirror.innerMode(outer, state);
    var style = outer.token(stream, state), cur = stream.current();
    stream.start = stream.pos;
    if (!atSol || /\S/.test(cur)) {
      out += cur;
      atSol = false;
    }
    if (!atSol && inner.mode.newlineAfterToken &&
        inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state))
      newline();
  }
  if (!stream.pos && outer.blankLine) outer.blankLine(state);
  if (!atSol) newline();
}

cm.operation(function () {
  cm.replaceRange(out, from, to);
  for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur)
    cm.indentLine(cur, "smart");
  cm.setSelection(from, cm.getCursor(false));
});
});
// console.log("初始化CodeMirror完成");
export default CodeMirror;

 <EditorDom
    title={item.name}
    editorListErr={editorListErr}      //嗯，忘了干啥了，时间有点长。。。可能也没啥用吧，刚学react时候写的
    placeholder={item.placeholder} //为空显示  
    type="json"                    
    key={'JsonEditors'}        
    rules={item.rules}           //是否校验不为空
    editorList={editorList}      //数据，多个编辑器情况下
    getEditorList={getEditorList}    // 拿到最新内容，修改editorList
/>

就这了吧，有很多可优化的地方，也不改了吧，就这吧。