如何将文本插入摩纳哥编辑器？

Question

我的应用程序中嵌入了一个摩纳哥代码编辑器。

如何以编程方式在特定行上插入文本？

var editor = monaco.editor.create(document.getElementById("container"), {
    value: "// First line\nfunction hello() {\n\talert('Hello world!');\n}\n// Last line",
    language: "javascript",

    lineNumbers: false,
    roundedSelection: false,
    scrollBeyondLastLine: false,
    readOnly: false,
    theme: "vs-dark",
});
// how do I do this?
editor.insertText("FOO");

Answer 1

更强大的解决方案是使用Selection API 而不是 Position

var selection = editor.getSelection();
var id = { major: 1, minor: 1 };             
var text = "XXX";
var op = {identifier: id, range: selection, text: text, forceMoveMarkers: true};
editor.executeEdits("my-source", [op]);

如果编辑器中已经有预先选择的文本，插入将替换它，在我看来，这是正确的行为。

Answer 2

使用executeEdits API

var line = editor.getPosition();
var range = new monaco.Range(line.lineNumber, 1, line.lineNumber, 1);
var id = { major: 1, minor: 1 };             
var text = "FOO";
var op = {identifier: id, range: range, text: text, forceMoveMarkers: true};
editor.executeEdits("my-source", [op]);

Answer 3

要在光标处插入文本，有这种非常简单的方法。 我经常使用它来制作片段工具栏：

editor.trigger('keyboard', 'type', {text: "test"});

如果选择文本，它将替换文本。

您还可以通过这种方式添加多行文本：

editor.trigger('keyboard', 'type', {text: `text on
multiple
line`});

Answer 4

更自然的解决方案（如上所述）可以是使用 monaco 附带的executeEdits方法，并使用带有行号和列号的特定范围，因为在示例中它们始终使用第一行：

const startLineNumber = 15 // Line number in which the content will start being typed
const startColumn = 5 // Column number in which the content will start being typed
const endLineNumber = 18 // Line number in which the text will finish
const endColumn = 25 
const text = "This is the new text" // The content going to be added


const range = new monaco.edito.Range(startLineNumber, startColumn, endLineNumber, endColumn); // It will go to the specific position of the editor

const id = { major: 1, minor: 1 }; // Required generic id

const editOperation = {identifier: id, range: range, text: text, forceMoveMarkers: true}; // The operation going to be performed

monaco.editor.executeEdits("custom-code", [ editOperation ]); // Runs the instruction

上面代码的好处是它可以添加、删除、更新和替换现有代码，因此它会非常高效，最终用户会看到它就像他/她正在打字一样。

Answer 5

我在使用 react 和 typescript 实现这一点时遇到了问题，所以希望这可以帮助某人。

import Editor, { Monaco, OnMount } from '@monaco-editor/react';
import { editor, languages } from 'monaco-editor';

...

const CustomEditor: React.FC = () => {

    const [monacoInstance, setMonacoInstance] = React.useState<editor.IStandaloneCodeEditor | null>(null);

    const insertText = (text: string) => {
        if (monacoInstance) {
            const selection = monacoInstance.getSelection();
            const id = { major: 1, minor: 1 };
            const op = {
                identifier: id,
                range: {
                    startLineNumber: selection?.selectionStartLineNumber || 1,
                    startColumn: selection?.selectionStartColumn || 1,
                    endLineNumber: selection?.endLineNumber || 1,
                    endColumn: selection?.endColumn || 1,
                },
                text,
                forceMoveMarkers: true,
            };
            monacoInstance.executeEdits('my-source', [op]);
        }
    };

    const editorMount: OnMount = (editorL: editor.IStandaloneCodeEditor) => {
        setMonacoInstance(editorL);
    };

...

        <Editor
            onMount={editorMount}

...

        <StyledButton // styled comp
            onClick={() => {insertText('inserted text');}}
        >
            insert text
        </StyledButton>