repo/org.ibex.tool/src/org/eclipse/jdt/internal/compiler/ast/StringLiteral.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 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 org.eclipse.jdt.internal.compiler.ast;
  12
  13 import org.eclipse.jdt.internal.compiler.ASTVisitor;
  14 import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
  15 import org.eclipse.jdt.internal.compiler.impl.Constant;
  16 import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
  17 import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
  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          *  Add the lit source to mine, just as if it was mine
  53          */
  54         public StringLiteralConcatenation extendsWith(StringLiteral lit) {
  55                 return new StringLiteralConcatenation(this, lit);
  56         }
  57         /**
  58          * Code generation for string literal
  59          */
  60         public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
  61
  62                 int pc = codeStream.position;
  63                 if (valueRequired)
  64                         codeStream.ldc(constant.stringValue());
  65                 codeStream.recordPositionsFrom(pc, this.sourceStart);
  66         }
  67
  68         public TypeBinding literalType(BlockScope scope) {
  69
  70                 return scope.getJavaLangString();
  71         }
  72
  73         public StringBuffer printExpression(int indent, StringBuffer output) {
  74
  75                 // handle some special char.....
  76                 output.append('\"');
  77                 for (int i = 0; i < source.length; i++) {
  78                         switch (source[i]) {
  79                                 case '\b' :
  80                                         output.append("\\b"); //$NON-NLS-1$
  81                                         break;
  82                                 case '\t' :
  83                                         output.append("\\t"); //$NON-NLS-1$
  84                                         break;
  85                                 case '\n' :
  86                                         output.append("\\n"); //$NON-NLS-1$
  87                                         break;
  88                                 case '\f' :
  89                                         output.append("\\f"); //$NON-NLS-1$
  90                                         break;
  91                                 case '\r' :
  92                                         output.append("\\r"); //$NON-NLS-1$
  93                                         break;
  94                                 case '\"' :
  95                                         output.append("\\\""); //$NON-NLS-1$
  96                                         break;
  97                                 case '\'' :
  98                                         output.append("\\'"); //$NON-NLS-1$
  99                                         break;
 100                                 case '\\' : //take care not to display the escape as a potential real char
 101                                         output.append("\\\\"); //$NON-NLS-1$
 102                                         break;
 103                                 default :
 104                                         output.append(source[i]);
 105                         }
 106                 }
 107                 output.append('\"');
 108                 return output;
 109         }
 110
 111         public char[] source() {
 112
 113                 return source;
 114         }
 115
 116         public void traverse(ASTVisitor visitor, BlockScope scope) {
 117                 visitor.visit(this, scope);
 118                 visitor.endVisit(this, scope);
 119         }
 120 }