@covalent/code-editor

TdCodeEditorComponent: td-code-editor

<td-code-editor> is component for code editing based on Covalent and Monaco Editor. The component can run in both Electron and Web Browsers.

API Summary

Inputs

• value?: string
  • value of the code editor instance
• language?: string
  • language used for syntax in the editor instance
• registerLanguage?: function()
  • registers a custom Language within the editor
• editorStyle?: string
  • Additional Styling applied to Editor Container
• theme?: string
  • Theme used to style the Editor
• editorOptions?: object
  • Editor Options Object of valid Configurations listed here: https://microsoft.github.io/monaco-editor/api/interfaces/monaco.editor.ieditoroptions.html
• layout?: function()
  • Instructs the editor to remeasure its container

Properties

• isFullScreen?: boolean
  • Is the editor currently in Full Screen mode
• fullScreenKeyBinding?: number
  • Sets the KeyCode for shortcutting to Fullscreen. Options listed see here: https://microsoft.github.io/monaco-editor/api/enums/monaco.keycode.html

Events

• editorInitialized?: function($event)
  • Emitted when Editor is finished initializing. Event passes a reference to the actual editor instance that can be used to call additional operations outside of the Angular component.
• editorConfigurationChanged?: function($event)
  • Emitted when configuration of the Editor changes
• editorLanguageChanged?: function($event)
  • Emitted when the language of the Editor changes

Installation

This component can be installed as npm package.

npm install @covalent/code-editor

Setup

Due to an known issue in Monaco Editor version 0.20.0 https://github.com/microsoft/monaco-editor/issues/1842 regarding errors arising when quickly disposing editor instances, utilize the 0.17.1 version of monaco-editor.

If you notice issues with icons not loading there's a known issue with css-loader that prevents it from loading the file font correctly https://github.com/microsoft/monaco-editor/issues/2742 downgrade to css-loader@5.2.7.

We utilize the ESM build of the Monaco Editor. To include this build, you must utilize custom webpack. See https://github.com/Microsoft/monaco-editor/blob/master/docs/integrate-esm.md for more information.

Install the webpack custom builder.

npm install --save-dev @angular-builders/custom-webpack

Install the Monaco Editor webpack extension plugin.

npm install --save-dev monaco-editor-webpack-plugin

Create a webpack config file utilizing the Monaco Editor webpack plugin. Languages and features can be included/excluded to control the resulting image size.

const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');

module.exports = {
  // target should only be specified when including component in Electron app
  target: 'electron-renderer',
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ['style-loader'],
      },
      {
        test: /\.ttf$/,
        type: 'asset/resource',
      },
    ],
  },
  plugins: [
    new MonacoWebpackPlugin({
      languages: ['css', 'html', 'javascript', 'sql', 'typescript'],
      features: ['contextmenu', 'clipboard', 'find'],
    }),
  ],
};

If using Webpack 4 or lower, it is necessary to use the file-loader instead of Asset Modules like the code below:

{
  test: /\.ttf$/,
  use: ['file-loader']
}

Note: If you are including this component in an Electron application, define the electron-renderer target. See Electron example here: https://github.com/Teradata/covalent-electron/blob/main/monaco-webpack.config.js

Reference the webpack file in your angular.json build config.

...
"build": {
  "builder": "@angular-builders/custom-webpack:browser",
  "options": {
    "customWebpackConfig": {
      "path": "./monaco-webpack.config.js",
      "mergeStrategies": {
        "module.rules": "prepend"
      }
    },
...

Import the CovalentCodeEditorModule in your NgModule:

import { CovalentCodeEditorModule } from '@covalent/code-editor';
@NgModule({
  imports: [
    CovalentCodeEditorModule,
    ...
  ],
  ...
})
export class MyModule {}

Example

<td-code-editor [style.height.px]="200" editorStyle="border:0;" flex theme="vs" language="sql" [editorOptions]="{readOnly:true, fontSize:20}" [(ngModel)]="model" (ngModelChange)="callBackFunc()"> </td-code-editor>

Running unit tests

Run nx test angular-code-editor to execute the unit tests.