使用的是vue語言，用element的元件，要做一個線上編輯代碼，要求輸入代碼内容，可以進行高亮展示，可以切換各不同語言，而且支援關鍵字補全，還要有一個各不同版本間的代碼左右比較，這就是需求。
至于為什麼選中monaco，請檢視 vue（element）中代碼高亮插件全面對比
好了，現在正式開工吧！
首先需要下載下傳monaco-editor元件，monaco-editor-webpack-plugin元件
npm install monaco-editor
npm install monaco-editor-webpack-plugin
當然啦，npm下載下傳很是緩慢，換個國内鏡像，淘寶的吧。果然，速度就嗖嗖的起來。
npm install -g cnpm --registry=https://registry.npm.taobao.org
cnpm install
cnpm install monaco-editor
cnpm install monaco-editor-webpack-plugin
可在node_modules下看到其目錄結構
核心代碼如下所示
首先寫個元件，供其他頁面引入調用，
CodeEditor.vue
<template>
<div class="code-container" ref="container"></div>
</template>
<script>
import * as monaco from "monaco-editor";
let sqlStr =
"ADD EXCEPT PERCENT ALL EXEC PLAN ALTER EXECUTE PRECISION AND EXISTS PRIMARY ANY EXIT PRINT AS FETCH PROC ASC FILE PROCEDURE AUTHORIZATION FILLFACTOR PUBLIC BACKUP FOR RAISERROR BEGIN FOREIGN READ BETWEEN FREETEXT READTEXT BREAK FREETEXTTABLE RECONFIGURE BROWSE FROM REFERENCES BULK FULL REPLICATION BY FUNCTION RESTORE CASCADE GOTO RESTRICT CASE GRANT RETURN CHECK GROUP REVOKE CHECKPOINT HAVING RIGHT CLOSE HOLDLOCK ROLLBACK CLUSTERED IDENTITY ROWCOUNT COALESCE IDENTITY_INSERT ROWGUIDCOL COLLATE IDENTITYCOL RULE COLUMN IF SAVE COMMIT IN SCHEMA COMPUTE INDEX SELECT CONSTRAINT INNER SESSION_USER CONTAINS INSERT SET CONTAINSTABLE INTERSECT SETUSER CONTINUE INTO SHUTDOWN CONVERT IS SOME CREATE JOIN STATISTICS CROSS KEY SYSTEM_USER CURRENT KILL TABLE CURRENT_DATE LEFT TEXTSIZE CURRENT_TIME LIKE THEN CURRENT_TIMESTAMP LINENO TO CURRENT_USER LOAD TOP CURSOR NATIONAL TRAN DATABASE NOCHECK TRANSACTION DBCC NONCLUSTERED TRIGGER DEALLOCATE NOT TRUNCATE DECLARE NULL TSEQUAL DEFAULT NULLIF UNION DELETE OF UNIQUE DENY OFF UPDATE DESC OFFSETS UPDATETEXT DISK ON USE DISTINCT OPEN USER DISTRIBUTED OPENDATASOURCE VALUES DOUBLE OPENQUERY VARYING DROP OPENROWSET VIEW DUMMY OPENXML WAITFOR DUMP OPTION WHEN ELSE OR WHERE END ORDER WHILE ERRLVL OUTER WITH ESCAPE OVER WRITETEXT";
export default {
name: "codeEditor",
props: {
options: {
type: Object,
default() {
return {
language: "java", // shell、sql、python
readOnly: true // 不能編輯
};
}
},
value: {
type: String,
default: ""
}
},
data() {
return {
monacoInstance: null,
provider: null,
hints: [
"SELECT",
"INSERT",
"DELETE",
"UPDATE",
"CREATE TABLE",
"DROP TABLE",
"ALTER TABLE",
"CREATE VIEW",
"DROP VIEW",
"CREATE INDEX",
"DROP INDEX",
"CREATE PROCEDURE",
"DROP PROCEDURE",
"CREATE TRIGGER",
"DROP TRIGGER",
"CREATE SCHEMA",
"DROP SCHEMA",
"CREATE DOMAIN",
"ALTER DOMAIN",
"DROP DOMAIN",
"GRANT",
"DENY",
"REVOKE",
"COMMIT",
"ROLLBACK",
"SET TRANSACTION",
"DECLARE",
"EXPLAN",
"OPEN",
"FETCH",
"CLOSE",
"PREPARE",
"EXECUTE",
"DESCRIBE",
"FORM",
"ORDER BY"
]
};
},
created() {
this.initHints();
},
mounted() {
this.init();
},
beforeDestroy() {
this.dispose();
},
methods: {
dispose() {
if (this.monacoInstance) {
if (this.monacoInstance.getModel()) {
this.monacoInstance.getModel().dispose();
}
this.monacoInstance.dispose();
this.monacoInstance = null;
if(this.provider){
this.provider.dispose();
this.provider = null
}
}
},
initHints() {
let sqlArr = sqlStr.split(" ");
this.hints = Array.from(new Set([...this.hints, ...sqlArr])).sort();
},
init() {
let that = this;
this.dispose();
let createCompleters = textUntilPosition => {
//過濾特殊字元
let _textUntilPosition = textUntilPosition
.replace(/[\*\[\]@\$\(\)]/g, "")
.replace(/(\s+|\.)/g, " ");
//切割成數組
let arr = _textUntilPosition.split(" ");
//取目前輸入值
let activeStr = arr[arr.length - 1];
//獲得輸入值的長度
let len = activeStr.length;
//獲得編輯區域内已經存在的内容
let rexp = new RegExp('([^\\w]|^)'+activeStr+'\\w*', "gim");
let match = that.value.match(rexp);
let _hints = !match ? [] : match.map(ele => {
let rexp = new RegExp(activeStr, "gim");
let search = ele.search(rexp);
return ele.substr(search)
})
//查找比對目前輸入值的元素
let hints = Array.from(new Set([...that.hints, ..._hints])).sort().filter(ele => {
let rexp = new RegExp(ele.substr(0, len), "gim");
return match && match.length === 1 && ele === activeStr || ele.length === 1
? false
: activeStr.match(rexp);
});
//添加内容提示
let res = hints.map(ele => {
return {
label: ele,
kind: that.hints.indexOf(ele) > -1 ? monaco.languages.CompletionItemKind.Keyword : monaco.languages.CompletionItemKind.Text,
documentation: ele,
insertText: ele
};
});
return res;
};
this.provider = monaco.languages.registerCompletionItemProvider("sql", {
provideCompletionItems(model, position) {
var textUntilPosition = model.getValueInRange({
startLineNumber: position.lineNumber,
startColumn: 1,
endLineNumber: position.lineNumber,
endColumn: position.column
});
var suggestions = createCompleters(textUntilPosition);
return {
suggestions: suggestions
};
return createCompleters(textUntilPosition);
}
});
// 初始化編輯器執行個體
this.monacoInstance = monaco.editor.create(this.$refs["container"], {
value: this.value,
theme: "vs-dark",
autoIndex: true,
...this.options
});
// 監聽編輯器content變化事件
this.monacoInstance.onDidChangeModelContent(() => {
this.$emit("contentChange", this.monacoInstance.getValue());
});
}
}
};
</script>
<style scope>
.code-container {
width: 100%;
height: 100%;
overflow: hidden;
border: 1px solid #eaeaea;
.monaco-editor .scroll-decoration {
box-shadow: none;
}
}
</style>
引入頁面，供本頁面使用
index.vue
<template>
<div class="container">
<code-editor
:options="options"
:value="content"
@contentChange="contentChange"
style="height: 400px; width: 600px;"
></code-editor>
</div>
</template>
<script>
import CodeEditor from "@/components/CodeEditor";
export default {
name: "SQLEditor",
components: {
CodeEditor
},
data() {
return {
content: "",
options: {
language: "sql",
theme: 'vs',
readOnly: false
}
};
},
created() {},
methods: {
// 綁定編輯器value值的變化
contentChange(val) {
this.content = val;
}
}
};
</script>
<style scoped >
.container {
text-align: left;
padding: 10px;
}
</style>
效果如下所示
代碼自動提示效果，如下所示
代碼高亮效果，代碼段折疊效果，右側預覽效果如下所示