94 lines
5.2 KiB
JavaScript
94 lines
5.2 KiB
JavaScript
/******************************************************************************
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* Copyright 2022 TypeFox GmbH
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* This program and the accompanying materials are made available under the
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* terms of the MIT License, which is available in the project root.
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******************************************************************************/
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import { AbstractFormatter, Formatting } from '../../lsp/formatter.js';
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import * as ast from '../../languages/generated/ast.js';
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const indentOrSpace = Formatting.fit(Formatting.oneSpace(), Formatting.indent());
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export class LangiumGrammarFormatter extends AbstractFormatter {
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format(node) {
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if (ast.isCrossReference(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.properties('type', 'terminal').surround(Formatting.noSpace());
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}
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else if (ast.isParserRule(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keywords('entry', 'fragment', 'returns').append(Formatting.oneSpace());
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if ((node.inferredType || node.returnType || node.dataType) && node.parameters.length === 0) {
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formatter.property('name').append(Formatting.oneSpace());
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}
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else {
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formatter.property('name').append(Formatting.noSpace());
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}
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formatter.properties('parameters').append(Formatting.noSpace());
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formatter.keywords(',').append(Formatting.oneSpace());
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formatter.keywords('<').append(Formatting.noSpace());
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const semicolon = formatter.keyword(';');
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const colon = formatter.keyword(':');
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colon.prepend(Formatting.noSpace());
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formatter.interior(colon, semicolon).prepend(Formatting.indent());
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semicolon.prepend(Formatting.fit(Formatting.noSpace(), Formatting.newLine()));
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formatter.node(node).prepend(Formatting.noIndent());
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}
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else if (ast.isTerminalRule(node)) {
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const formatter = this.getNodeFormatter(node);
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if (node.type) {
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formatter.property('name').append(Formatting.oneSpace());
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formatter.keyword('returns').append(Formatting.oneSpace());
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}
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formatter.keywords('hidden', 'terminal', 'fragment').append(Formatting.oneSpace());
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formatter.keyword(':').prepend(Formatting.noSpace());
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formatter.keyword(';').prepend(Formatting.fit(Formatting.noSpace(), Formatting.newLine()));
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formatter.node(node).prepend(Formatting.noIndent());
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}
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else if (ast.isAction(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keyword('{').append(Formatting.noSpace());
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formatter.keywords('.', '+=', '=').surround(Formatting.noSpace());
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formatter.keyword('}').prepend(Formatting.noSpace());
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}
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else if (ast.isInferredType(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keywords('infer', 'infers').append(Formatting.oneSpace());
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}
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else if (ast.isAssignment(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keywords('=', '+=', '?=').surround(Formatting.noSpace());
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}
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else if (ast.isRuleCall(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keyword('<').surround(Formatting.noSpace());
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formatter.keyword(',').append(Formatting.oneSpace());
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formatter.properties('arguments').append(Formatting.noSpace());
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}
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else if (ast.isInterface(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keyword('interface').append(Formatting.oneSpace());
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formatter.keyword('extends').prepend(Formatting.oneSpace()).append(indentOrSpace);
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formatter.keywords(',').prepend(Formatting.noSpace()).append(indentOrSpace);
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const bracesOpen = formatter.keyword('{');
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bracesOpen.prepend(Formatting.fit(Formatting.oneSpace(), Formatting.newLine()));
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const bracesClose = formatter.keyword('}');
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bracesClose.prepend(Formatting.newLine());
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formatter.interior(bracesOpen, bracesClose).prepend(Formatting.indent());
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}
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else if (ast.isType(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.keyword('type').append(Formatting.oneSpace());
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formatter.keyword('=').prepend(Formatting.oneSpace()).append(indentOrSpace);
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formatter.keyword(';').prepend(Formatting.noSpace()).append(Formatting.newLine());
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}
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else if (ast.isGrammar(node)) {
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const formatter = this.getNodeFormatter(node);
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const nodes = formatter.nodes(...node.rules, ...node.interfaces, ...node.types, ...node.imports);
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nodes.prepend(Formatting.noIndent());
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formatter.keyword('grammar').prepend(Formatting.noSpace()).append(Formatting.oneSpace());
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}
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if (ast.isAbstractElement(node)) {
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const formatter = this.getNodeFormatter(node);
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formatter.property('cardinality').prepend(Formatting.noSpace());
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}
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}
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}
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//# sourceMappingURL=grammar-formatter.js.map
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