platform/lang-impl/src/com/intellij/ide/highlighter/custom/impl/CustomFileTypeQuoteHandler.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.ide.highlighter.custom.impl;

import com.intellij.codeInsight.editorActions.QuoteHandler;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.highlighter.HighlighterIterator;
import com.intellij.psi.CustomHighlighterTokenType;
import com.intellij.psi.tree.IElementType;

/**
 * @author Maxim.Mossienko
 */
class CustomFileTypeQuoteHandler implements QuoteHandler {
  @Override
  public boolean isClosingQuote(HighlighterIterator iterator, int offset) {
    final IElementType tokenType = iterator.getTokenType();

    if (isQuotedToken(tokenType)){
      int start = iterator.getStart();
      int end = iterator.getEnd();
      return end - start >= 1 && offset == end - 1;
    }
    return false;
  }

  static boolean isQuotedToken(IElementType tokenType) {
    return tokenType == CustomHighlighterTokenType.STRING ||
        tokenType == CustomHighlighterTokenType.SINGLE_QUOTED_STRING ||
        tokenType == CustomHighlighterTokenType.CHARACTER;
  }

  @Override
  public boolean isOpeningQuote(HighlighterIterator iterator, int offset) {
    if (isQuotedToken(iterator.getTokenType())){
      int start = iterator.getStart();
      return offset == start;
    }
    return false;
  }

  @Override
  public boolean hasNonClosedLiteral(Editor editor, HighlighterIterator iterator, int offset) {
    try {
      Document doc = editor.getDocument();
      CharSequence chars = doc.getCharsSequence();
      int lineEnd = doc.getLineEndOffset(doc.getLineNumber(offset));

      while (!iterator.atEnd() && iterator.getStart() < lineEnd) {
        if (isQuotedToken(iterator.getTokenType())) {

          if (iterator.getStart() >= iterator.getEnd() - 1 ||
              chars.charAt(iterator.getEnd() - 1) != '\"' && chars.charAt(iterator.getEnd() - 1) != '\'') {
            return true;
          }
        }
        iterator.advance();
      }
    } finally {
      while (!iterator.atEnd() && iterator.getStart() != offset) iterator.retreat();
    }

    return false;
  }

  @Override
  public boolean isInsideLiteral(HighlighterIterator iterator) {
    return isQuotedToken(iterator.getTokenType());
  }
}