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

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  14 import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
  15 import net.sourceforge.phpdt.internal.compiler.impl.Constant;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  18
  19 public class StringLiteral extends Literal {
  20         char[] source;
  21
  22 public StringLiteral(char[] token, int s, int e) {
  23         this(s,e);
  24         source = token;
  25 }
  26 public StringLiteral(int s, int e) {
  27         super(s,e);
  28 }
  29 public void computeConstant() {
  30
  31         constant = Constant.fromValue(String.valueOf(source));}
  32 public ExtendedStringLiteral extendWith(CharLiteral lit){
  33         //add the lit source to mine, just as if it was mine
  34
  35         return new ExtendedStringLiteral(this,lit);
  36 }
  37 public ExtendedStringLiteral extendWith(StringLiteral lit){
  38         //add the lit source to mine, just as if it was mine
  39
  40         return new ExtendedStringLiteral(this,lit);
  41 }
  42 /**
  43  * Code generation for string literal
  44  *
  45  * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
  46  * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
  47  * @param valueRequired boolean
  48  */
  49 public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
  50         int pc = codeStream.position;
  51         if (valueRequired)
  52                 codeStream.ldc(constant.stringValue());
  53         codeStream.recordPositionsFrom(pc, this.sourceStart);
  54 }
  55 public TypeBinding literalType(BlockScope scope) {
  56         return scope.getJavaLangString();
  57 }
  58 /**
  59  * source method comment.
  60  */
  61 public char[] source() {
  62         return source;
  63 }
  64 public String toStringExpression() {
  65
  66         // handle some special char.....
  67         StringBuffer result = new StringBuffer("\""); //$NON-NLS-1$
  68         for (int i = 0; i < source.length; i++) {
  69                 switch (source[i]) {
  70                         case '\b' :
  71                                 result.append("\\b"); //$NON-NLS-1$
  72                                 break;
  73                         case '\t' :
  74                                 result.append("\\t"); //$NON-NLS-1$
  75                                 break;
  76                         case '\n' :
  77                                 result.append("\\n"); //$NON-NLS-1$
  78                                 break;
  79                         case '\f' :
  80                                 result.append("\\f"); //$NON-NLS-1$
  81                                 break;
  82                         case '\r' :
  83                                 result.append("\\r"); //$NON-NLS-1$
  84                                 break;
  85                         case '\"' :
  86                                 result.append("\\\""); //$NON-NLS-1$
  87                                 break;
  88                         case '\'' :
  89                                 result.append("\\'"); //$NON-NLS-1$
  90                                 break;
  91                         case '\\' : //take care not to display the escape as a potential real char
  92                                 result.append("\\\\"); //$NON-NLS-1$
  93                                 break;
  94                         default :
  95                                 result.append(source[i]);
  96                 }
  97         }
  98         result.append("\""); //$NON-NLS-1$
  99         return result.toString();
 100 }
 101 public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
 102         visitor.visit(this, scope);
 103         visitor.endVisit(this, scope);
 104 }
 105 }