vue codemirror实现在线代码编译器

前言

如果我们想在web端实现在线代码编译的效果，那么需要使用组件vue-codemirror，他是将codemirror进行了再次封装

• 支持代码高亮
• 62种主题颜色，例如monokai等等
• 支持json, sql, javascript，css，xml, html，yaml, markdown, python编辑模式，默认为 json
• 支持快速搜索
• 支持自动补全提示
• 支持自动匹配括号

环境准备

npm install jshint
npm install jsonlint
npm install script-loader
npm install vue-codemirror

封装组件

我们可以在项目中的components中将vue-codemirror进行再次封装

<template>
  <codemirror
    ref="mycm"
    v-model="editorvalue"
    :options="cmoptions"
    @changes="oncmcodechanges"
    @blur="oncmblur"
    @keydown.native="onkeydown"
    @mousedown.native="onmousedown"
    @paste.native="onpaste"
  >
  </codemirror>
</template>

<script>
import { codemirror } from "vue-codemirror";
import 'codemirror/keymap/sublime'
import "codemirror/mode/javascript/javascript.js";
import "codemirror/mode/xml/xml.js";
import "codemirror/mode/htmlmixed/htmlmixed.js";
import "codemirror/mode/css/css.js";
import "codemirror/mode/yaml/yaml.js";
import "codemirror/mode/sql/sql.js";
import "codemirror/mode/python/python.js";
import "codemirror/mode/markdown/markdown.js";
import "codemirror/addon/hint/show-hint.css";
import "codemirror/addon/hint/show-hint.js";
import "codemirror/addon/hint/javascript-hint.js";
import "codemirror/addon/hint/xml-hint.js";
import "codemirror/addon/hint/css-hint.js";
import "codemirror/addon/hint/html-hint.js";
import "codemirror/addon/hint/sql-hint.js";
import "codemirror/addon/hint/anyword-hint.js";
import "codemirror/addon/lint/lint.css";
import "codemirror/addon/lint/lint.js";
import "codemirror/addon/lint/json-lint";
import 'codemirror/addon/selection/active-line'
import "codemirror/addon/hint/show-hint.js";
import "codemirror/addon/hint/anyword-hint.js";
require("script-loader!jsonlint");
import "codemirror/addon/lint/javascript-lint.js";
import "codemirror/addon/fold/foldcode.js";
import "codemirror/addon/fold/foldgutter.js";
import "codemirror/addon/fold/foldgutter.css";
import "codemirror/addon/fold/brace-fold.js";
import "codemirror/addon/fold/xml-fold.js";
import "codemirror/addon/fold/comment-fold.js";
import "codemirror/addon/fold/markdown-fold.js";
import "codemirror/addon/fold/indent-fold.js";
import "codemirror/addon/edit/closebrackets.js";
import "codemirror/addon/edit/closetag.js";
import "codemirror/addon/edit/matchtags.js";
import "codemirror/addon/edit/matchbrackets.js";
import "codemirror/addon/selection/active-line.js";
import "codemirror/addon/search/jump-to-line.js";
import "codemirror/addon/dialog/dialog.js";
import "codemirror/addon/dialog/dialog.css";
import "codemirror/addon/search/searchcursor.js";
import "codemirror/addon/search/search.js";
import "codemirror/addon/display/autorefresh.js";
import "codemirror/addon/selection/mark-selection.js";
import "codemirror/addon/search/match-highlighter.js";
export default {
  name: "index",
  components: {codemirror},
  props: ["cmtheme", "cmmode", "cmindentunit", "autoformatjson"],
  data() {
    return {
      editorvalue: '{}',
      cmoptions: {
        theme: !this.cmtheme || this.cmtheme === "default" ? "default" : this.cmtheme,  // 主题
        mode: !this.cmmode || this.cmmode === "default" ? "application/json" : this.cmmode,  // 代码格式
        tabsize: 4,  // tab的空格个数
        indentunit: !this.cmindentunit ? 2 : this.cmindentunit,  // 一个块（编辑语言中的含义）应缩进多少个空格
        autocorrect: true,  // 自动更正
        spellcheck: true,  // 拼写检查
        lint: true,  // 检查格式
        linenumbers: true,  //是否显示行数
        linewrapping: true, //是否自动换行
        styleactiveline: true,  //line选择是是否高亮
        keymap: 'sublime',  // sublime编辑器效果
        matchbrackets: true,  //括号匹配
        autoclosebrackets: true,  // 在键入时将自动关闭括号和引号
        matchtags: { bothtags: true },  // 将突出显示光标周围的标签
        foldgutter: true,  // 可将对象折叠，与下面的gutters一起使用
        gutters: [
          "codemirror-lint-markers",
          "codemirror-linenumbers",
          "codemirror-foldgutter"
        ],
        highlightselectionmatches: {
          minchars: 2,
          style: "matchhighlight",
          showtoken: true
        },
      },
      enableautoformatjson: this.autoformatjson == null ? true : this.autoformatjson,  // json编辑模式下，输入框失去焦点时是否自动格式化，true 开启， false 关闭
    }
  },
  created() {
    try {
      if (!this.editorvalue) {
        this.cmoptions.lint = false;
        return;
      }
      if (this.cmoptions.mode === "application/json") {
        if (!this.enableautoformatjson) {
          return;
        }
        this.editorvalue = this.formatstrinjson(this.editorvalue);
      }
    } catch (e) {
      console.log("初始化codemirror出错：" + e);
    }
  },
  methods: {
    resetlint() {
      if (!this.$refs.mycm.codemirror.getvalue()) {
        this.$nexttick(() => {
          this.$refs.mycm.codemirror.setoption("lint", false);
        });
        return;
      }
      this.$refs.mycm.codemirror.setoption("lint", false);
      this.$nexttick(() => {
        this.$refs.mycm.codemirror.setoption("lint", true);
      });
    },
    // 格式化字符串为json格式字符串
    formatstrinjson(strvalue) {
      return json.stringify(
        json.parse(strvalue),
        null,
        this.cmindentunit
      );
    },
    oncmcodechanges(cm, changes) {
      this.editorvalue = cm.getvalue();
      this.resetlint();
    },
    // 失去焦点时处理函数
    oncmblur(cm, event) {
      try {
        let editorvalue = cm.getvalue();
        if (this.cmoptions.mode === "application/json" && editorvalue) {
          if (!this.enableautoformatjson) {
            return;
          }
          this.editorvalue = this.formatstrinjson(editorvalue);
        }
      } catch (e) {
        // 啥也不做
      }
    },
    // 按下键盘事件处理函数
    onkeydown(event) {
      const keycode = event.keycode || event.which || event.charcode;
      const keycombination =
          event.ctrlkey || event.altkey || event.metakey;
      if (!keycombination && keycode > 64 && keycode < 123) {
        this.$refs.mycm.codemirror.showhint({ completesingle: false });
      }
    },
    // 按下鼠标时事件处理函数
    onmousedown(event) {
      this.$refs.mycm.codemirror.closehint();
    },
    // 黏贴事件处理函数
    onpaste(event) {
      if (this.cmoptions.mode === "application/json") {
        try {
          this.editorvalue = this.formatstrinjson(this.editorvalue);
        } catch (e) {
          // 啥都不做
        }
      }
    },
  }
}
</script>

<style scoped>

</style>

此组件默认配置了json编译器，cmoptions中是代码编译器的配置项，需要额外的功能也可以去看官方文档配置
接下来看展示效果

可以看到我们输入了json格式的字符串，即使格式不正确，会给我们错误提示，并且也会给我们自动格式化

python编译器

我们封装的组件默认是json编译器，如果我们想使用其他语言，也很简单，只需要导入其他语言的mode

<template>
  <div>
    <el-button type="primary" icon="el-icon-circle-check-outline" @click="handleconfirm" round>
      点击保存
    </el-button>
    <el-button icon="el-icon-caret-right" type="info" @click="handleruncode" round>
      在线运行
    </el-button>
  <code-editor
    :cmtheme="cmtheme"
    :cmmode="cmmode"
  >
  </code-editor>
  </div>
</template>

<script>
import codeeditor from '@/components/codeeditor/index'
import 'codemirror/theme/monokai.css'  // 导入monokai主题
import 'codemirror/mode/python/python.js'  // 导入python
export default {
  name: "index",
  components: {
    codeeditor
  },
  data() {
    return {
      cmtheme: "monokai",
      cmmode: "python",
    }
  },
  methods: {
    handleconfirm() {},
    handleruncode() {}
  }
}
</script>

<style>
.codemirror {
  position: relative;
  height: 100vh;
  overflow: hidden;
  margin-top: 10px;
}
</style>
<style lang="scss" scoped>
</style>

效果如下

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