js制作xml在線編輯器實例

import { useEffect } from 'react'
import { Controlled as ControlledCodeMirror } from 'react-codemirror2'
import CodeMirror from 'codemirror'
import 'codemirror/lib/codemirror.css'
import 'codemirror/theme/ayu-dark.css'
import 'codemirror/mode/xml/xml.js'
// 光標行代碼高亮
import 'codemirror/addon/selection/active-line'
// 折疊代碼
import 'codemirror/addon/fold/foldgutter.css'
import 'codemirror/addon/fold/foldcode.js'
import 'codemirror/addon/fold/xml-fold.js'
import 'codemirror/addon/fold/foldgutter.js'
import 'codemirror/addon/fold/comment-fold.js'
// 代碼提示補全和
import 'codemirror/addon/hint/xml-hint.js'
import 'codemirror/addon/hint/show-hint.css'
import './hint.css'
import 'codemirror/addon/hint/show-hint.js'
// 代碼校驗
import 'codemirror/addon/lint/lint'
import 'codemirror/addon/lint/lint.css'
import CodeMirrorRegisterXmlLint from './xml-lint'
// 輸入> 時自動鍵入結束標簽
import 'codemirror/addon/edit/closetag.js'
// 註釋
import 'codemirror/addon/comment/comment.js'

// 用於調整codeMirror的主題樣式
import style from './index.less'

// 註冊Xml代碼校驗
CodeMirrorRegisterXmlLint(CodeMirror)

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

// 格式化指定范圍
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 && i < text.length - 1) 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));
});
});

// Xml編輯器組件
function XmlEditor(props) {
const { tags, value, onChange, onErrors, onGetEditor, onSave } = props

useEffect(() => {
    // tags 每次變動時，都會重新改變校驗規則
    CodeMirrorRegisterXmlLint(CodeMirror, tags, onErrors)
}, [onErrors, tags])

// 開始標簽
function completeAfter(cm, pred) {
    if (!pred || pred()) setTimeout(function () {
    if (!cm.state.completionActive)
        cm.showHint({
        completeSingle: false
        });
    }, 100);
    return CodeMirror.Pass;
}

// 結束標簽
function completeIfAfterLt(cm) {
    return completeAfter(cm, function () {
    var cur = cm.getCursor();
    return cm.getRange(CodeMirror.Pos(cur.line, cur.ch - 1), cur) === "<";
    });
}

// 屬性和屬性值
function completeIfInTag(cm) {
    return completeAfter(cm, function () {
    var tok = cm.getTokenAt(cm.getCursor());
    if (tok.type === "string" && (!/['"]/.test(tok.string.charAt(tok.string.length - 1)) || tok.string.length === 1)) return false;
    var inner = CodeMirror.innerMode(cm.getMode(), tok.state).state;
    return inner.tagName;
    });
}

return (
    <div className={style.editor} >
    <ControlledCodeMirror
        value={value}
        options={{
        mode: {
            name: 'xml',
            // xml 屬性換行的時候是否加上標簽的長度
            multilineTagIndentPastTag: false
        },
        indentUnit: 2, // 換行的默認縮進多少個空格
        theme: 'ayu-dark', // 編輯器主題
        lineNumbers: true,// 是否顯示行號
        autofocus: true,// 自動獲取焦點
        styleActiveLine: true,// 光標行代碼高亮
        autoCloseTags: true, // 在輸入>時自動鍵入結束元素
        toggleComment: true, // 開啟註釋
        // 折疊代碼 begin
        lineWrapping: true,
        foldGutter: true,
        gutters: ['CodeMirror-linenumbers', 'CodeMirror-foldgutter', 'CodeMirror-lint-markers'],
        // 折疊代碼 end
        extraKeys: {
            // 代碼提示
            "'<'": completeAfter,
            "'/'": completeIfAfterLt,
            "' '": completeIfInTag,
            "'='": completeIfInTag,
            // 註釋功能
            "Ctrl-/": (cm) => {
            cm.toggleComment()
            },
            // 保存功能
            "Ctrl-S": (cm) => {
            onSave()
            },
            // 格式化
            "Shift-Alt-F": (cm) => {
            const totalLines = cm.lineCount();
            cm.autoFormatRange({ line: 0, ch: 0 }, { line: totalLines })
            },
            // Tab自動轉換為空格
            "Tab": (cm) => {
            if (cm.somethingSelected()) {// 選中後整體縮進的情況
                cm.indentSelection('add')
            } else {
                cm.replaceSelection(Array(cm.getOption("indentUnit") + 1).join(" "), "end", "+input")
            }
            }
        },
        // 代碼提示
        hintOptions: { schemaInfo: tags, matchInMiddle: true },
        lint: true
        }}
        editorDidMount={onGetEditor}
        onBeforeChange={onChange}
    />
    </div>
)
}

export default XmlEditor

import { lintFileTree } from '@/utils/files'

onmessage = ({ data }) => {
lintFileTree(data.fileTree, data.currentTags).then(content => {
    postMessage(content)
})
}

import { useWebWorkerFromWorker } from 'react-webworker-hook'
import lintFileTreeWorker from '@/utils/webWorker/lintFileTree.webworker'

const worker4LintFileTree = new lintFileTreeWorker()

const [lintedFileTree, startLintFileTree] = useWebWorkerFromWorker(worker4LintFileTree)

    import React from 'react'

    // 自定義的打開文件夾組件
    const FileInput = (props) => {
    const { children, onChange } = props
    const handleClick = async () => {
        const dirHandle = await window.showDirectoryPicker()
        dirHandle.requestPermission({ mode : "readwrite" })
        onChange(dirHandle)
    }
    return <span onClick={handleClick}>
        {children}
    </span>
    }

    export default FileInput