xml/impl/src/com/intellij/psi/impl/source/tree/injected/XmlAttributeLiteralEscaper.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.xml.XmlAttributeValueImpl;
  19 import com.intellij.psi.xml.XmlAttribute;
  20 import com.intellij.psi.LiteralTextEscaper;
  21 import com.intellij.openapi.util.TextRange;
  22 import com.intellij.openapi.util.ProperTextRange;
  23 import org.jetbrains.annotations.NotNull;
  24
  25 /**
  26  * @author cdr
  27 */
  28 public class XmlAttributeLiteralEscaper extends LiteralTextEscaper<XmlAttributeValueImpl> {
  29   private final XmlAttribute myXmlAttribute;
  30
  31   public XmlAttributeLiteralEscaper(XmlAttributeValueImpl host) {
  32     super(host);
  33     myXmlAttribute = (XmlAttribute)host.getParent();
  34   }
  35
  36   public boolean decode(@NotNull final TextRange rangeInsideHost, @NotNull StringBuilder outChars) {
  37     ProperTextRange.assertProperRange(rangeInsideHost);
  38     TextRange valueTextRange = myXmlAttribute.getValueTextRange();
  39     int startInDecoded = myXmlAttribute.physicalToDisplay(rangeInsideHost.getStartOffset() - valueTextRange.getStartOffset());
  40     int endInDecoded = myXmlAttribute.physicalToDisplay(rangeInsideHost.getEndOffset() - valueTextRange.getStartOffset());
  41     String displayValue = myXmlAttribute.getDisplayValue();
  42     //todo investigate IIOB http://www.jetbrains.net/jira/browse/IDEADEV-16796
  43     startInDecoded = startInDecoded < 0 ? 0 : startInDecoded > displayValue.length() ? displayValue.length() : startInDecoded;
  44     endInDecoded = endInDecoded < 0 ? 0 : endInDecoded > displayValue.length() ? displayValue.length() : endInDecoded;
  45     if (startInDecoded > endInDecoded) endInDecoded = startInDecoded;
  46     outChars.append(displayValue, startInDecoded, endInDecoded);
  47     return true;
  48   }
  49
  50   public int getOffsetInHost(final int offsetInDecoded, @NotNull final TextRange rangeInsideHost) {
  51     TextRange valueTextRange = myXmlAttribute.getValueTextRange();
  52     int displayStart = myXmlAttribute.physicalToDisplay(rangeInsideHost.getStartOffset());
  53
  54     int dp = myXmlAttribute.displayToPhysical(offsetInDecoded + displayStart - valueTextRange.getStartOffset());
  55     if (dp == -1) return -1;
  56     return dp + valueTextRange.getStartOffset();
  57   }
  58
  59   public boolean isOneLine() {
  60     return true;
  61   }
  62 }