net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/internal/compiler/ast/StringLiteral.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpeclipse.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  14 import net.sourceforge.phpdt.internal.compiler.impl.Constant;
  15 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  17
  18
  19 public class StringLiteral extends Literal {
  20
  21         char[] source;
  22
  23         public StringLiteral(char[] token, int s, int e) {
  24
  25                 this(s,e);
  26                 source = token;
  27         }
  28
  29         public StringLiteral(int s, int e) {
  30
  31                 super(s,e);
  32         }
  33
  34         public void computeConstant() {
  35
  36                 constant = Constant.fromValue(String.valueOf(source));
  37         }
  38
  39         public ExtendedStringLiteral extendWith(CharLiteral lit){
  40
  41                 //add the lit source to mine, just as if it was mine
  42                 return new ExtendedStringLiteral(this,lit);
  43         }
  44
  45         public ExtendedStringLiteral extendWith(StringLiteral lit){
  46
  47                 //add the lit source to mine, just as if it was mine
  48                 return new ExtendedStringLiteral(this,lit);
  49         }
  50
  51         /**
  52          * Code generation for string literal
  53          */
  54 //      public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
  55 //
  56 //              int pc = codeStream.position;
  57 //              if (valueRequired)
  58 //                      codeStream.ldc(constant.stringValue());
  59 //              codeStream.recordPositionsFrom(pc, this.sourceStart);
  60 //      }
  61
  62         public TypeBinding literalType(BlockScope scope) {
  63
  64                 return scope.getJavaLangString();
  65         }
  66
  67         public char[] source() {
  68
  69                 return source;
  70         }
  71
  72         public String toStringExpression() {
  73
  74                 // handle some special char.....
  75                 StringBuffer result = new StringBuffer("\""); //$NON-NLS-1$
  76                 for (int i = 0; i < source.length; i++) {
  77                         switch (source[i]) {
  78                                 case '\b' :
  79                                         result.append("\\b"); //$NON-NLS-1$
  80                                         break;
  81                                 case '\t' :
  82                                         result.append("\\t"); //$NON-NLS-1$
  83                                         break;
  84                                 case '\n' :
  85                                         result.append("\\n"); //$NON-NLS-1$
  86                                         break;
  87                                 case '\f' :
  88                                         result.append("\\f"); //$NON-NLS-1$
  89                                         break;
  90                                 case '\r' :
  91                                         result.append("\\r"); //$NON-NLS-1$
  92                                         break;
  93                                 case '\"' :
  94                                         result.append("\\\""); //$NON-NLS-1$
  95                                         break;
  96                                 case '\'' :
  97                                         result.append("\\'"); //$NON-NLS-1$
  98                                         break;
  99                                 case '\\' : //take care not to display the escape as a potential real char
 100                                         result.append("\\\\"); //$NON-NLS-1$
 101                                         break;
 102                                 default :
 103                                         result.append(source[i]);
 104                         }
 105                 }
 106                 result.append("\""); //$NON-NLS-1$
 107                 return result.toString();
 108         }
 109
 110         public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
 111                 visitor.visit(this, scope);
 112                 visitor.endVisit(this, scope);
 113         }
 114 }