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Language Server Protocol implementation for 1C (BSL) - 1C:Enterprise 8 and OneScript languages.

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/*
 * This file is a part of BSL Language Server.
 *
 * Copyright (c) 2018-2024
 * Alexey Sosnoviy , Nikita Fedkin  and contributors
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 *
 * BSL Language Server is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 *
 * BSL Language Server is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with BSL Language Server.
 */
package com.github._1c_syntax.bsl.languageserver.providers;

import com.github._1c_syntax.bsl.languageserver.context.DocumentContext;
import com.github._1c_syntax.bsl.languageserver.context.symbol.SourceDefinedSymbol;
import com.github._1c_syntax.bsl.languageserver.references.ReferenceResolver;
import com.github._1c_syntax.bsl.languageserver.references.model.Reference;
import lombok.RequiredArgsConstructor;
import org.eclipse.lsp4j.DefinitionParams;
import org.eclipse.lsp4j.LocationLink;
import org.eclipse.lsp4j.Position;
import org.springframework.stereotype.Component;

import java.util.Collections;
import java.util.List;

@Component
@RequiredArgsConstructor
public class DefinitionProvider {

  private final ReferenceResolver referenceResolver;

  public List getDefinition(DocumentContext documentContext, DefinitionParams params) {
    Position position = params.getPosition();

    return referenceResolver.findReference(documentContext.getUri(), position)
      .filter(Reference::isSourceDefinedSymbolReference)
      .map(DefinitionProvider::toLocationLink)
      .map(Collections::singletonList)
      .orElse(Collections.emptyList());
  }

  private static LocationLink toLocationLink(Reference reference) {
    SourceDefinedSymbol symbol = (SourceDefinedSymbol) reference.getSymbol();

    return new LocationLink(
      symbol.getOwner().getUri().toString(),
      symbol.getRange(),
      symbol.getSelectionRange(),
      reference.getSelectionRange()
    );
  }
}