/*******************************************************************************
 * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v0.5 
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v05.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 ******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.ast;

import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
import net.sourceforge.phpdt.internal.compiler.impl.Constant;
import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;

public class StringLiteral extends Literal {
	char[] source;

public StringLiteral(char[] token, int s, int e) {
	this(s,e);
	source = token;
}
public StringLiteral(int s, int e) {
	super(s,e);
}
public void computeConstant() {

	constant = Constant.fromValue(String.valueOf(source));}
public ExtendedStringLiteral extendWith(CharLiteral lit){
	//add the lit source to mine, just as if it was mine

	return new ExtendedStringLiteral(this,lit);
}
public ExtendedStringLiteral extendWith(StringLiteral lit){
	//add the lit source to mine, just as if it was mine

	return new ExtendedStringLiteral(this,lit);
}
/**
 * Code generation for string literal
 *
 * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
 * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
 * @param valueRequired boolean
 */ 
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
	int pc = codeStream.position;
	if (valueRequired)
		codeStream.ldc(constant.stringValue());
	codeStream.recordPositionsFrom(pc, this.sourceStart);
}
public TypeBinding literalType(BlockScope scope) {
	return scope.getJavaLangString();
}
/**
 * source method comment.
 */
public char[] source() {
	return source;
}
public String toStringExpression() {

	// handle some special char.....
	StringBuffer result = new StringBuffer("\""); //$NON-NLS-1$
	for (int i = 0; i < source.length; i++) {
		switch (source[i]) {
			case '\b' :
				result.append("\\b"); //$NON-NLS-1$
				break;
			case '\t' :
				result.append("\\t"); //$NON-NLS-1$
				break;
			case '\n' :
				result.append("\\n"); //$NON-NLS-1$
				break;
			case '\f' :
				result.append("\\f"); //$NON-NLS-1$
				break;
			case '\r' :
				result.append("\\r"); //$NON-NLS-1$
				break;
			case '\"' :
				result.append("\\\""); //$NON-NLS-1$
				break;
			case '\'' :
				result.append("\\'"); //$NON-NLS-1$
				break;
			case '\\' : //take care not to display the escape as a potential real char
				result.append("\\\\"); //$NON-NLS-1$
				break;
			default :
				result.append(source[i]);
		}
	}
	result.append("\""); //$NON-NLS-1$
	return result.toString();
}
public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
	visitor.visit(this, scope);
	visitor.endVisit(this, scope);
}
}