java/java-impl/src/com/intellij/codeInsight/editorActions/wordSelection/LiteralSelectioner.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.codeInsight.editorActions.wordSelection;
  17
  18 import com.intellij.codeInsight.editorActions.SelectWordUtil;
  19 import com.intellij.lexer.StringLiteralLexer;
  20 import com.intellij.openapi.editor.Editor;
  21 import com.intellij.openapi.util.TextRange;
  22 import com.intellij.psi.JavaTokenType;
  23 import com.intellij.psi.PsiElement;
  24 import com.intellij.psi.PsiLiteralExpression;
  25 import com.intellij.psi.StringEscapesTokenTypes;
  26
  27 import java.util.List;
  28
  29 public class LiteralSelectioner extends BasicSelectioner {
  30   public boolean canSelect(PsiElement e) {
  31     PsiElement parent = e.getParent();
  32     return
  33       isStringLiteral(e) || isStringLiteral(parent);
  34   }
  35
  36   private static boolean isStringLiteral(PsiElement element) {
  37     return element instanceof PsiLiteralExpression &&
  38            ((PsiLiteralExpression)element).getType().equalsToText("java.lang.String") && element.getText().startsWith("\"") && element.getText().endsWith("\"");
  39   }
  40
  41   public List<TextRange> select(PsiElement e, CharSequence editorText, int cursorOffset, Editor editor) {
  42     List<TextRange> result = super.select(e, editorText, cursorOffset, editor);
  43
  44     TextRange range = e.getTextRange();
  45     final StringLiteralLexer lexer = new StringLiteralLexer('\"', JavaTokenType.STRING_LITERAL);
  46     lexer.start(editorText, range.getStartOffset(), range.getEndOffset());
  47
  48     while (lexer.getTokenType() != null) {
  49       if (lexer.getTokenStart() <= cursorOffset && cursorOffset < lexer.getTokenEnd()) {
  50         if (StringEscapesTokenTypes.STRING_LITERAL_ESCAPES.contains(lexer.getTokenType())) {
  51           result.add(new TextRange(lexer.getTokenStart(), lexer.getTokenEnd()));
  52         }
  53         else {
  54           TextRange word = SelectWordUtil.getWordSelectionRange(editorText, cursorOffset);
  55           if (word != null) {
  56             result.add(new TextRange(Math.max(word.getStartOffset(), lexer.getTokenStart()),
  57                                      Math.min(word.getEndOffset(), lexer.getTokenEnd())));
  58           }
  59         }
  60         break;
  61       }
  62       lexer.advance();
  63     }
  64
  65     result.add(new TextRange(range.getStartOffset() + 1, range.getEndOffset() - 1));
  66
  67     return result;
  68   }
  69 }