java/manifest/src/org/jetbrains/lang/manifest/parser/ManifestParserDefinition.java

/*
 * Copyright (c) 2007-2009, Osmorc Development Team
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright notice, this list
 *       of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice, this
 *       list of conditions and the following disclaimer in the documentation and/or other
 *       materials provided with the distribution.
 *     * Neither the name of 'Osmorc Development Team' nor the names of its contributors may be
 *       used to endorse or promote products derived from this software without specific
 *       prior written permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.jetbrains.lang.manifest.parser;

import com.intellij.lang.ASTNode;
import com.intellij.lang.ParserDefinition;
import com.intellij.lang.PsiParser;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.project.Project;
import com.intellij.psi.FileViewProvider;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.tree.IFileElementType;
import com.intellij.psi.tree.TokenSet;
import com.intellij.psi.util.PsiUtilCore;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.lang.manifest.psi.Header;
import org.jetbrains.lang.manifest.psi.ManifestElementType;
import org.jetbrains.lang.manifest.psi.impl.ManifestFileImpl;

/**
 * @author Robert F. Beeger (robert@beeger.net)
 */
public class ManifestParserDefinition implements ParserDefinition {
  @NotNull
  @Override
  public Lexer createLexer(Project project) {
    return new ManifestLexer();
  }

  @Override
  public PsiParser createParser(Project project) {
    return new ManifestParser();
  }

  @Override
  public IFileElementType getFileNodeType() {
    return ManifestElementType.FILE;
  }

  @NotNull
  @Override
  public TokenSet getWhitespaceTokens() {
    return TokenSet.EMPTY;
  }

  @NotNull
  @Override
  public TokenSet getCommentTokens() {
    return TokenSet.EMPTY;
  }

  @NotNull
  @Override
  public TokenSet getStringLiteralElements() {
    return TokenSet.EMPTY;
  }

  @NotNull
  @Override
  public PsiElement createElement(ASTNode node) {
    IElementType type = node.getElementType();
    if (type instanceof ManifestElementType) {
      return ((ManifestElementType)type).createPsi(node);
    }

    return PsiUtilCore.NULL_PSI_ELEMENT;
  }

  @Override
  public PsiFile createFile(FileViewProvider viewProvider) {
    return new ManifestFileImpl(viewProvider);
  }

  @SuppressWarnings("SpellCheckingInspection")
  @Override
  public SpaceRequirements spaceExistanceTypeBetweenTokens(ASTNode left, ASTNode right) {
    return left.getPsi() instanceof Header || right.getPsi() instanceof Header ?
           SpaceRequirements.MUST_LINE_BREAK : SpaceRequirements.MUST_NOT;
  }
}