src/vs/editor/common/languages/enterAction.ts

65 LOC · 13 covered · 52 uncovered · 1 ranges · 12 concepts · 1 introducers · 7 tests

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  /*---------------------------------------------------------------------------------------------
  
languageConfigurationExtensionPoint.ts ×19

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   *  Copyright (c) Microsoft Corporation. All rights reserved.
  
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   *  Licensed under the MIT License. See License.txt in the project root for license information.
  
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   *--------------------------------------------------------------------------------------------*/
  
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  import { Range } from '../core/range.js';
  
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  import { ITextModel } from '../model.js';
  
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  import { IndentAction, CompleteEnterAction } from './languageConfiguration.js';
  
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  import { EditorAutoIndentStrategy } from '../config/editorOptions.js';
  
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  import { getIndentationAtPosition, ILanguageConfigurationService } from './languageConfigurationRegistry.js';
  
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  import { IndentationContextProcessor } from './supports/indentationLineProcessor.js';
  
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  export function getEnterAction(
  
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  	autoIndent: EditorAutoIndentStrategy,
  
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  	model: ITextModel,
  
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  	range: Range,
  
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  	languageConfigurationService: ILanguageConfigurationService
  
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  ): CompleteEnterAction | null {
  
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  	model.tokenization.forceTokenization(range.startLineNumber);
  
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  	const languageId = model.getLanguageIdAtPosition(range.startLineNumber, range.startColumn);
  
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  	const richEditSupport = languageConfigurationService.getLanguageConfiguration(languageId);
  
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  	if (!richEditSupport) {
  
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  		return null;
  
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  	}
  
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  	const indentationContextProcessor = new IndentationContextProcessor(model, languageConfigurationService);
  
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  	const processedContextTokens = indentationContextProcessor.getProcessedTokenContextAroundRange(range);
  
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  	const previousLineText = processedContextTokens.previousLineProcessedTokens.getLineContent();
  
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  	const beforeEnterText = processedContextTokens.beforeRangeProcessedTokens.getLineContent();
  
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  	const afterEnterText = processedContextTokens.afterRangeProcessedTokens.getLineContent();
  
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  	const enterResult = richEditSupport.onEnter(autoIndent, previousLineText, beforeEnterText, afterEnterText);
  
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  	if (!enterResult) {
  
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  		return null;
  
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  	}
  
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  	const indentAction = enterResult.indentAction;
  
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  	let appendText = enterResult.appendText;
  
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  	const removeText = enterResult.removeText || 0;
  
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  	// Here we add `\t` to appendText first because enterAction is leveraging appendText and removeText to change indentation.
  
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  	if (!appendText) {
  
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  		if (
  
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  			(indentAction === IndentAction.Indent) ||
  
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  			(indentAction === IndentAction.IndentOutdent)
  
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  		) {
  
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  			appendText = '\t';
  
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  		} else {
  
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  			appendText = '';
  
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  		}
  
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  	} else if (indentAction === IndentAction.Indent) {
  
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  		appendText = '\t' + appendText;
  
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  	}
  
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  	let indentation = getIndentationAtPosition(model, range.startLineNumber, range.startColumn);
  
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  	if (removeText) {
  
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  		indentation = indentation.substring(0, indentation.length - removeText);
  
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  	}
  
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  	return {
  
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  		indentAction: indentAction,
  
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  		appendText: appendText,
  
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  		removeText: removeText,
  
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  		indentation: indentation
  
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  	};
  
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  }