Incorporating Monaco Editor into a MUD React App - wwestlake/Labyrinth GitHub Wiki
The Monaco Editor is a powerful code editor that powers Visual Studio Code, offering features such as syntax highlighting, code completion, and IntelliSense. This document outlines the steps to incorporate the Monaco Editor into a MUD React application, focusing on providing syntax highlighting for the custom MudLang language and extending the editor with features like code suggestions.
Integrate Monaco Editor: Embed the Monaco Editor within the React application to provide an in-browser code editor for MudLang scripts.
Syntax Highlighting: Implement custom syntax highlighting rules specific to MudLang to enhance readability and usability.
Code Suggestions: Develop a system to offer code suggestions, including IntelliSense-like functionality, helping users write correct and efficient MudLang code.
Extensibility: Design the integration in a way that allows easy updates and additions to the language rules, suggestions, and other editor functionalities.
- Install and Setup Monaco Editor in React To start, you will need to install the necessary packages to include Monaco Editor in your React application.
You can install the Monaco Editor package via npm:
npm install @monaco-editor/reactCreate a React component to include the Monaco Editor. Here's an example of how to set up the editor:
import React from 'react';
import { MonacoEditor } from '@monaco-editor/react';
const MudLangEditor = () => {
return (
<MonacoEditor
height="90vh"
language="mudlang"
theme="vs-dark"
options={{
selectOnLineNumbers: true,
minimap: { enabled: false }
}}
onChange={(value) => console.log('Changed:', value)}
/>
);
};
export default MudLangEditor;- Implement Syntax Highlighting for MudLang To enable syntax highlighting, you must define a custom language in Monaco Editor and specify the tokens that define your language’s syntax.
Define MudLang Tokens and Rules First, create the token definitions for MudLang:
import * as monaco from 'monaco-editor';
monaco.languages.register({ id: 'mudlang' });
monaco.languages.setMonarchTokensProvider('mudlang', {
keywords: ['move', 'attack', 'say', 'pickup', 'look', 'if', 'then', 'else', 'let'],
typeKeywords: ['number', 'string', 'boolean'],
operators: [
'=', '>', '<', '!', '~', '?', ':', '==', '<=', '>=', '!=', '&&', '||', '+', '-', '*', '/', '%'
],
symbols: /[=><!~?:&|+\-*\/\^%]+/,
tokenizer: {
root: [
[/[a-z_$][\w$]*/, { cases: { '@keywords': 'keyword', '@default': 'identifier' }}],
[/[A-Z][\w\$]*/, 'type.identifier' ],
{ include: '@whitespace' },
[/\d+/, 'number'],
[/[;,.]/, 'delimiter'],
[/[{}()\[\]]/, '@brackets'],
[/@symbols/, { cases: { '@operators': 'operator', '@default' : '' }}],
[/".*"/, 'string'],
],
whitespace: [
[/[ \t\r\n]+/, ''],
[/\/\*\*(?!\/)/, 'comment.doc', '@jsdoc'],
[/\/\*/, 'comment', '@comment'],
[/\/\/.*$/, 'comment'],
],
comment: [
[/[^\/*]+/, 'comment'],
[/\*\//, 'comment', '@pop'],
[/[\/*]/, 'comment']
],
jsdoc: [
[/[^\/*]+/, 'comment.doc'],
[/\*\//, 'comment.doc', '@pop'],
[/[\/*]/, 'comment.doc']
],
},
});This defines the basic syntax highlighting rules for MudLang, associating certain keywords, operators, and symbols with specific token types.
Apply Syntax Highlighting in the Editor Ensure that the MudLangEditor component uses the mudlang language ID defined above:
import React from 'react';
import { MonacoEditor } from '@monaco-editor/react';
import * as monaco from 'monaco-editor';
// Language configuration goes here (as shown in the previous step)
const MudLangEditor = () => {
React.useEffect(() => {
monaco.languages.register({ id: 'mudlang' });
monaco.languages.setMonarchTokensProvider('mudlang', {
// Token definitions go here
});
}, []);
return (
<MonacoEditor
height="90vh"
language="mudlang"
theme="vs-dark"
options={{
selectOnLineNumbers: true,
minimap: { enabled: false }
}}
onChange={(value) => console.log('Changed:', value)}
/>
);
};
export default MudLangEditor;- Adding Code Suggestions (IntelliSense) To further enhance the developer experience, we can add code completion features that suggest keywords, functions, variables, etc., as the user types.
Register a Completion Provider Use Monaco's registerCompletionItemProvider to offer suggestions when editing MudLang code:
monaco.languages.registerCompletionItemProvider('mudlang', {
provideCompletionItems: () => {
const suggestions = [
{
label: 'move',
kind: monaco.languages.CompletionItemKind.Function,
insertText: 'move(${1:direction})',
insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
documentation: 'Move the player in the specified direction.'
},
{
label: 'attack',
kind: monaco.languages.CompletionItemKind.Function,
insertText: 'attack(${1:target})',
insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
documentation: 'Attack a specified target.'
},
// Additional suggestions here
];
return { suggestions: suggestions };
}
});Activate Suggestions in the Editor Ensure that the suggestions are activated by integrating this into the MudLangEditor component:
import React from 'react';
import { MonacoEditor } from '@monaco-editor/react';
import * as monaco from 'monaco-editor';
const MudLangEditor = () => {
React.useEffect(() => {
monaco.languages.register({ id: 'mudlang' });
monaco.languages.setMonarchTokensProvider('mudlang', {
// Token definitions
});
monaco.languages.registerCompletionItemProvider('mudlang', {
provideCompletionItems: () => {
const suggestions = [
{
label: 'move',
kind: monaco.languages.CompletionItemKind.Function,
insertText: 'move(${1:direction})',
insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
documentation: 'Move the player in the specified direction.'
},
{
label: 'attack',
kind: monaco.languages.CompletionItemKind.Function,
insertText: 'attack(${1:target})',
insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
documentation: 'Attack a specified target.'
},
// Additional suggestions here
];
return { suggestions: suggestions };
}
});
}, []);
return (
<MonacoEditor
height="90vh"
language="mudlang"
theme="vs-dark"
options={{
selectOnLineNumbers: true,
minimap: { enabled: false }
}}
onChange={(value) => console.log('Changed:', value)}
/>
);
};
export default MudLangEditor;- Enhancing the Language Features Beyond basic syntax highlighting and code suggestions, you can further enhance MudLang in Monaco by adding features such as:
Error Checking and Diagnostics: Implement custom validation to catch and highlight syntax errors or logical inconsistencies. Hover Information: Provide detailed information on hover, such as documentation strings or type info for functions and variables. Signature Help: Show function signatures as the user types, guiding them on the correct usage of commands. These features can be added by registering additional providers, similar to the completion item provider.
- Integration and Testing After implementing the above features, integrate the editor component into the main React application, ensuring it functions as intended. Testing should include:
Syntax Highlighting Validation: Ensure that all keywords, operators, and expressions are highlighted correctly. Code Suggestions: Verify that suggestions are contextually accurate and aid in writing MudLang code. Performance Testing: Ensure the editor performs well with large scripts and under various conditions. Conclusion Incorporating the Monaco Editor into a MUD React app will provide users with a powerful, interactive environment for writing MudLang scripts. By implementing custom syntax highlighting and code suggestion features, the editor will not only enhance the user experience but also help ensure the correctness and efficiency of the code being written. The flexibility of Monaco allows for continuous enhancements, making it a robust solution for your MUD application’s scripting needs.