/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.cdt.internal.core.search.indexing;

/**
* @author bgheorgh
*/

import java.util.LinkedList;

import org.eclipse.cdt.core.parser.DefaultProblemHandler;
import org.eclipse.cdt.core.parser.IProblem;
import org.eclipse.cdt.core.parser.ISourceElementRequestor;
import org.eclipse.cdt.core.parser.ParserMode;
import org.eclipse.cdt.core.parser.ast.IASTASMDefinition;
import org.eclipse.cdt.core.parser.ast.IASTAbstractTypeSpecifierDeclaration;
import org.eclipse.cdt.core.parser.ast.IASTClassReference;
import org.eclipse.cdt.core.parser.ast.IASTClassSpecifier;
import org.eclipse.cdt.core.parser.ast.IASTCodeScope;
import org.eclipse.cdt.core.parser.ast.IASTCompilationUnit;
import org.eclipse.cdt.core.parser.ast.IASTElaboratedTypeSpecifier;
import org.eclipse.cdt.core.parser.ast.IASTEnumerationReference;
import org.eclipse.cdt.core.parser.ast.IASTEnumerationSpecifier;
import org.eclipse.cdt.core.parser.ast.IASTEnumerator;
import org.eclipse.cdt.core.parser.ast.IASTEnumeratorReference;
import org.eclipse.cdt.core.parser.ast.IASTField;
import org.eclipse.cdt.core.parser.ast.IASTFieldReference;
import org.eclipse.cdt.core.parser.ast.IASTFunction;
import org.eclipse.cdt.core.parser.ast.IASTFunctionReference;
import org.eclipse.cdt.core.parser.ast.IASTInclusion;
import org.eclipse.cdt.core.parser.ast.IASTLinkageSpecification;
import org.eclipse.cdt.core.parser.ast.IASTMacro;
import org.eclipse.cdt.core.parser.ast.IASTMethod;
import org.eclipse.cdt.core.parser.ast.IASTMethodReference;
import org.eclipse.cdt.core.parser.ast.IASTNamespaceDefinition;
import org.eclipse.cdt.core.parser.ast.IASTNamespaceReference;
import org.eclipse.cdt.core.parser.ast.IASTParameterDeclaration;
import org.eclipse.cdt.core.parser.ast.IASTParameterReference;
import org.eclipse.cdt.core.parser.ast.IASTTemplateDeclaration;
import org.eclipse.cdt.core.parser.ast.IASTTemplateInstantiation;
import org.eclipse.cdt.core.parser.ast.IASTTemplateSpecialization;
import org.eclipse.cdt.core.parser.ast.IASTTypeSpecifier;
import org.eclipse.cdt.core.parser.ast.IASTTypedefDeclaration;
import org.eclipse.cdt.core.parser.ast.IASTTypedefReference;
import org.eclipse.cdt.core.parser.ast.IASTUsingDeclaration;
import org.eclipse.cdt.core.parser.ast.IASTUsingDirective;
import org.eclipse.cdt.core.parser.ast.IASTVariable;
import org.eclipse.cdt.core.parser.ast.IASTVariableReference;
import org.eclipse.cdt.internal.core.index.IDocument;

/**
 * @author bgheorgh
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class SourceIndexerRequestor implements ISourceElementRequestor, IIndexConstants {
	
	SourceIndexer indexer;
	IDocument document;

	char[] packageName;
	char[][] enclosingTypeNames = new char[5][];
	int depth = 0;
	int methodDepth = 0;
	
	private IASTInclusion currentInclude = null;
	private LinkedList includeStack = new LinkedList();
	
	public SourceIndexerRequestor(SourceIndexer indexer, IDocument document) {
		super();
		this.indexer = indexer;
		this.document= document;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptProblem(org.eclipse.cdt.core.parser.IProblem)
	 */
	public boolean acceptProblem(IProblem problem) {
		return DefaultProblemHandler.ruleOnProblem( problem, ParserMode.COMPLETE_PARSE );
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptMacro(org.eclipse.cdt.core.parser.ast.IASTMacro)
	 */
	public void acceptMacro(IASTMacro macro) {
		// TODO Auto-generated method stub
		indexer.addMacro(macro);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptVariable(org.eclipse.cdt.core.parser.ast.IASTVariable)
	 */
	public void acceptVariable(IASTVariable variable) {
		// TODO Auto-generated method stub
		//System.out.println("acceptVariable");
		indexer.addVariable(variable);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptFunctionDeclaration(org.eclipse.cdt.core.parser.ast.IASTFunction)
	 */
	public void acceptFunctionDeclaration(IASTFunction function) {
		// TODO Auto-generated method stub
		//System.out.println("acceptFunctionDeclaration");
		indexer.addFunctionDeclaration(function);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptUsingDirective(org.eclipse.cdt.core.parser.ast.IASTUsingDirective)
	 */
	public void acceptUsingDirective(IASTUsingDirective usageDirective) {
		// TODO Auto-generated method stub
		//System.out.println("acceptUsingDirective");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptUsingDeclaration(org.eclipse.cdt.core.parser.ast.IASTUsingDeclaration)
	 */
	public void acceptUsingDeclaration(IASTUsingDeclaration usageDeclaration) {
		// TODO Auto-generated method stub
		//System.out.println("acceptUsingDeclaration");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptASMDefinition(org.eclipse.cdt.core.parser.ast.IASTASMDefinition)
	 */
	public void acceptASMDefinition(IASTASMDefinition asmDefinition) {
		// TODO Auto-generated method stub
		//System.out.println("acceptASMDefinition");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptTypedef(org.eclipse.cdt.core.parser.ast.IASTTypedef)
	 */
	public void acceptTypedefDeclaration(IASTTypedefDeclaration typedef) {
		// TODO Auto-generated method stub
		indexer.addTypedefDeclaration(typedef);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptEnumerationSpecifier(org.eclipse.cdt.core.parser.ast.IASTEnumerationSpecifier)
	 */
	public void acceptEnumerationSpecifier(IASTEnumerationSpecifier enumeration) {
		// TODO Auto-generated method stub
		//System.out.println("acceptEnumSpecifier");
		indexer.addEnumerationSpecifier(enumeration);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterFunctionBody(org.eclipse.cdt.core.parser.ast.IASTFunction)
	 */
	public void enterFunctionBody(IASTFunction function) {
		// TODO Auto-generated method stub
		indexer.addFunctionDeclaration(function);
		//indexer.addFunctionDefinition();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitFunctionBody(org.eclipse.cdt.core.parser.ast.IASTFunction)
	 */
	public void exitFunctionBody(IASTFunction function) {
		// TODO Auto-generated method stub
		//System.out.println("exitFunctionBody");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterCompilationUnit(org.eclipse.cdt.core.parser.ast.IASTCompilationUnit)
	 */
	public void enterCompilationUnit(IASTCompilationUnit compilationUnit) {
		// TODO Auto-generated method stub
		//System.out.println("enterCompilationUnit");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterInclusion(org.eclipse.cdt.core.parser.ast.IASTInclusion)
	 */
	public void enterInclusion(IASTInclusion inclusion) {
		// TODO Auto-generated method stub
		
		IASTInclusion parent = peekInclude();
		indexer.addInclude(inclusion, parent);
		//Push on stack
		pushInclude(inclusion);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterNamespaceDefinition(org.eclipse.cdt.core.parser.ast.IASTNamespaceDefinition)
	 */
	public void enterNamespaceDefinition(IASTNamespaceDefinition namespaceDefinition) {
		// TODO Auto-generated method stub
		//System.out.println("enterNamespaceDefinition");
		indexer.addNamespaceDefinition(namespaceDefinition);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterClassSpecifier(org.eclipse.cdt.core.parser.ast.IASTClassSpecifier)
	 */
	public void enterClassSpecifier(IASTClassSpecifier classSpecification) {
		// TODO Auto-generated method stub
		
		//System.out.println("New class spec: " + classSpecification.getName());
		indexer.addClassSpecifier(classSpecification);
		//System.out.println("enterClassSpecifier");

	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterLinkageSpecification(org.eclipse.cdt.core.parser.ast.IASTLinkageSpecification)
	 */
	public void enterLinkageSpecification(IASTLinkageSpecification linkageSpec) {
		// TODO Auto-generated method stub
		//System.out.println("enterLinkageSpecification");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterTemplateDeclaration(org.eclipse.cdt.core.parser.ast.IASTTemplateDeclaration)
	 */
	public void enterTemplateDeclaration(IASTTemplateDeclaration declaration) {
		// TODO Auto-generated method stub
		//System.out.println("enterTemplateDeclaration");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterTemplateSpecialization(org.eclipse.cdt.core.parser.ast.IASTTemplateSpecialization)
	 */
	public void enterTemplateSpecialization(IASTTemplateSpecialization specialization) {
		// TODO Auto-generated method stub
		//System.out.println("enterTemplateSpecialization");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterTemplateExplicitInstantiation(org.eclipse.cdt.core.parser.ast.IASTTemplateInstantiation)
	 */
	public void enterTemplateInstantiation(IASTTemplateInstantiation instantiation) {
		// TODO Auto-generated method stub
		//System.out.println("enterTemplateExplicitInstantiation");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptMethodDeclaration(org.eclipse.cdt.core.parser.ast.IASTMethod)
	 */
	public void acceptMethodDeclaration(IASTMethod method) {
		// TODO Auto-generated method stub
		//System.out.println("acceptMethodDeclaration");
		indexer.addMethodDeclaration(method);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterMethodBody(org.eclipse.cdt.core.parser.ast.IASTMethod)
	 */
	public void enterMethodBody(IASTMethod method) {
		// TODO Auto-generated method stub
		//System.out.println("enterMethodBody " + method.getName());
		indexer.addMethodDeclaration(method);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitMethodBody(org.eclipse.cdt.core.parser.ast.IASTMethod)
	 */
	public void exitMethodBody(IASTMethod method) {
		// TODO Auto-generated method stub
		//System.out.println("exitMethodBody");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptField(org.eclipse.cdt.core.parser.ast.IASTField)
	 */
	public void acceptField(IASTField field) {
		// TODO Auto-generated method stub
	  // System.out.println("acceptField");
	   indexer.addFieldDeclaration(field);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptClassReference(org.eclipse.cdt.core.parser.ast.IASTClassSpecifier, int)
	 */
	public void acceptClassReference(IASTClassReference reference) {
		// TODO Auto-generated method stub
		//System.out.println("acceptClassReference");
		if (reference.getReferencedElement() instanceof IASTClassSpecifier)
			indexer.addClassReference((IASTClassSpecifier)reference.getReferencedElement());
		else if (reference.getReferencedElement() instanceof IASTElaboratedTypeSpecifier)
		{
		    indexer.addClassReference((IASTTypeSpecifier) reference.getReferencedElement());
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitTemplateDeclaration(org.eclipse.cdt.core.parser.ast.IASTTemplateDeclaration)
	 */
	public void exitTemplateDeclaration(IASTTemplateDeclaration declaration) {
		// TODO Auto-generated method stub
		//System.out.println("exitTemplateDeclaration");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitTemplateSpecialization(org.eclipse.cdt.core.parser.ast.IASTTemplateSpecialization)
	 */
	public void exitTemplateSpecialization(IASTTemplateSpecialization specialization) {
		// TODO Auto-generated method stub
		//System.out.println("exitTemplateSpecialization");

	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitTemplateExplicitInstantiation(org.eclipse.cdt.core.parser.ast.IASTTemplateInstantiation)
	 */
	public void exitTemplateExplicitInstantiation(IASTTemplateInstantiation instantiation) {
		// TODO Auto-generated method stub
		//System.out.println("exitTemplateExplicitInstantiation");

	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitLinkageSpecification(org.eclipse.cdt.core.parser.ast.IASTLinkageSpecification)
	 */
	public void exitLinkageSpecification(IASTLinkageSpecification linkageSpec) {
		// TODO Auto-generated method stub
		//System.out.println("exitLinkageSpecification");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitClassSpecifier(org.eclipse.cdt.core.parser.ast.IASTClassSpecifier)
	 */
	public void exitClassSpecifier(IASTClassSpecifier classSpecification) {
		// TODO Auto-generated method stub
		//System.out.println("exitClassSpecifier");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitNamespaceDefinition(org.eclipse.cdt.core.parser.ast.IASTNamespaceDefinition)
	 */
	public void exitNamespaceDefinition(IASTNamespaceDefinition namespaceDefinition) {
		// TODO Auto-generated method stub
		//System.out.println("exitNamespaceDefinition");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitInclusion(org.eclipse.cdt.core.parser.ast.IASTInclusion)
	 */
	public void exitInclusion(IASTInclusion inclusion) {
		// TODO Auto-generated method stub
		popInclude();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitCompilationUnit(org.eclipse.cdt.core.parser.ast.IASTCompilationUnit)
	 */
	public void exitCompilationUnit(IASTCompilationUnit compilationUnit) {
		// TODO Auto-generated method stub
		//System.out.println("exitCompilationUnit");

}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptAbstractTypeSpecDeclaration(org.eclipse.cdt.core.parser.ast.IASTAbstractTypeSpecifierDeclaration)
	 */
	public void acceptAbstractTypeSpecDeclaration(IASTAbstractTypeSpecifierDeclaration abstractDeclaration) {
		// TODO Auto-generated method stub
		
	}

	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptTypedefReference(org.eclipse.cdt.core.parser.ast.IASTTypedefReference)
	 */
	public void acceptTypedefReference(IASTTypedefReference reference) {
		// TODO Auto-generated method stub
		if( reference.getReferencedElement() instanceof IASTTypedefDeclaration )
			indexer.addTypedefReference( (IASTTypedefDeclaration) reference.getReferencedElement() );
		
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptNamespaceReference(org.eclipse.cdt.core.parser.ast.IASTNamespaceReference)
	 */
	public void acceptNamespaceReference(IASTNamespaceReference reference) {
		// TODO Auto-generated method stub
		if (reference.getReferencedElement() instanceof IASTNamespaceDefinition)
		indexer.addNamespaceReference((IASTNamespaceDefinition)reference.getReferencedElement());	
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptEnumerationReference(org.eclipse.cdt.core.parser.ast.IASTEnumerationReference)
	 */
	public void acceptEnumerationReference(IASTEnumerationReference reference) {
		// TODO Auto-generated method stub
		if (reference.getReferencedElement() instanceof IASTEnumerationSpecifier)
		  indexer.addEnumerationReference((IASTEnumerationSpecifier) reference.getReferencedElement());
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptVariableReference(org.eclipse.cdt.core.parser.ast.IASTVariableReference)
	 */
	public void acceptVariableReference(IASTVariableReference reference) {
		// TODO Auto-generated method stub
		if (reference.getReferencedElement() instanceof IASTVariable)
			indexer.addVariableReference((IASTVariable)reference.getReferencedElement());
	
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptFunctionReference(org.eclipse.cdt.core.parser.ast.IASTFunctionReference)
	 */
	public void acceptFunctionReference(IASTFunctionReference reference) {
		if (reference.getReferencedElement() instanceof IASTFunction)
			indexer.addFunctionReference((IASTFunction) reference.getReferencedElement());
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptFieldReference(org.eclipse.cdt.core.parser.ast.IASTFieldReference)
	 */
	public void acceptFieldReference(IASTFieldReference reference) {
		if (reference.getReferencedElement() instanceof IASTField)
		  indexer.addFieldReference((IASTField) reference.getReferencedElement());
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptMethodReference(org.eclipse.cdt.core.parser.ast.IASTMethodReference)
	 */
	public void acceptMethodReference(IASTMethodReference reference) {
		if (reference.getReferencedElement() instanceof IASTMethod)
		 indexer.addMethodReference((IASTMethod) reference.getReferencedElement());
	}
    /* (non-Javadoc)
     * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptElaboratedForewardDeclaration(org.eclipse.cdt.core.parser.ast.IASTElaboratedTypeSpecifier)
     */
    public void acceptElaboratedForewardDeclaration(IASTElaboratedTypeSpecifier elaboratedType){
        indexer.addElaboratedForwardDeclaration(elaboratedType);       
    }
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#enterCodeBlock(org.eclipse.cdt.core.parser.ast.IASTScope)
	 */
	public void enterCodeBlock(IASTCodeScope scope) {
		// TODO Auto-generated method stub
		
	}
	/* (non-Javadoc)
	 * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#exitCodeBlock(org.eclipse.cdt.core.parser.ast.IASTScope)
	 */
	public void exitCodeBlock(IASTCodeScope scope) {
		// TODO Auto-generated method stub
		
	}
    /* (non-Javadoc)
     * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptEnumeratorReference(org.eclipse.cdt.core.parser.ast.IASTEnumerationReference)
     */
    public void acceptEnumeratorReference(IASTEnumeratorReference reference)
    {
     	if( reference.getReferencedElement() instanceof IASTEnumerator )
     		indexer.addEnumeratorReference( (IASTEnumerator)reference.getReferencedElement() );
        
    }
    /* (non-Javadoc)
     * @see org.eclipse.cdt.core.parser.ISourceElementRequestor#acceptParameterReference(org.eclipse.cdt.internal.core.parser.ast.complete.ASTParameterReference)
     */
    public void acceptParameterReference(IASTParameterReference reference)
    {
        if( reference.getReferencedElement() instanceof IASTParameterDeclaration )
        	indexer.addParameterReference( (IASTParameterDeclaration) reference.getReferencedElement() );
        
    }
    
	private void pushInclude( IASTInclusion inclusion ){
		includeStack.addFirst( currentInclude );
		currentInclude = inclusion;
	}
	
	private IASTInclusion popInclude(){
		IASTInclusion oldInclude = currentInclude;
		currentInclude = (includeStack.size() > 0 ) ? (IASTInclusion) includeStack.removeFirst() : null;
		return oldInclude;
	}
	
	private IASTInclusion peekInclude(){
		return currentInclude;
	}
}