android/src/com/android/tools/idea/lang/databinding/DbParserDefinition.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.tools.idea.lang.databinding;

import com.android.tools.idea.lang.databinding.parser.DbParser;
import com.android.tools.idea.lang.databinding.psi.DbTokenTypes;
import com.intellij.lang.ASTNode;
import com.intellij.lang.Language;
import com.intellij.lang.ParserDefinition;
import com.intellij.lang.PsiParser;
import com.intellij.lexer.FlexAdapter;
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.TokenType;
import com.intellij.psi.tree.IFileElementType;
import com.intellij.psi.tree.TokenSet;
import org.jetbrains.annotations.NotNull;

import java.io.Reader;

public class DbParserDefinition implements ParserDefinition {

  private static final IFileElementType FILE_ELEMENT_TYPE = new IFileElementType(Language.findInstance(DbLanguage.class));
  private static final TokenSet WHITE_SPACES = TokenSet.create(TokenType.WHITE_SPACE);

  @NotNull
  @Override
  public Lexer createLexer(Project project) {
    return new FlexAdapter(new _DbLexer((Reader)null));
  }

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

  @Override
  public IFileElementType getFileNodeType() {
    return FILE_ELEMENT_TYPE;
  }

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

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

  @NotNull
  @Override
  public TokenSet getStringLiteralElements() {
    return TokenSet.create(DbTokenTypes.STRING_LITERAL);
  }

  @NotNull
  @Override
  public PsiElement createElement(ASTNode node) {
    return DbTokenTypes.Factory.createElement(node);
  }

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

  @Override
  public SpaceRequirements spaceExistanceTypeBetweenTokens(ASTNode left, ASTNode right) {
    return SpaceRequirements.MAY;
  }
}