java/java-impl/src/com/intellij/psi/impl/source/tree/injected/StringLiteralEscaper.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.psi.impl.source.tree.injected;
  17
  18 import com.intellij.psi.impl.source.tree.java.PsiLiteralExpressionImpl;
  19 import com.intellij.psi.LiteralTextEscaper;
  20 import com.intellij.openapi.util.TextRange;
  21 import com.intellij.openapi.util.ProperTextRange;
  22 import org.jetbrains.annotations.NotNull;
  23
  24 /**
  25  * @author cdr
  26 */
  27 public class StringLiteralEscaper extends LiteralTextEscaper<PsiLiteralExpressionImpl> {
  28   private int[] outSourceOffsets;
  29
  30   public StringLiteralEscaper(PsiLiteralExpressionImpl host) {
  31     super(host);
  32   }
  33
  34   public boolean decode(@NotNull final TextRange rangeInsideHost, @NotNull StringBuilder outChars) {
  35     ProperTextRange.assertProperRange(rangeInsideHost);
  36     String subText = rangeInsideHost.substring(myHost.getText());
  37     outSourceOffsets = new int[subText.length()+1];
  38     return PsiLiteralExpressionImpl.parseStringCharacters(subText, outChars, outSourceOffsets);
  39   }
  40
  41   public int getOffsetInHost(int offsetInDecoded, @NotNull final TextRange rangeInsideHost) {
  42     int result = offsetInDecoded < outSourceOffsets.length ? outSourceOffsets[offsetInDecoded] : -1;
  43     if (result == -1) return -1;
  44     return (result <= rangeInsideHost.getLength() ? result : rangeInsideHost.getLength()) + rangeInsideHost.getStartOffset();
  45   }
  46
  47   public boolean isOneLine() {
  48     return true;
  49   }
  50 }