/*******************************************************************************
* Copyright (c) 2004, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* John Camelon (IBM) - Initial API and implementation
* Bryan Wilkinson (QNX)
* Markus Schorn (Wind River Systems)
* Jens Elmenthaler - http://bugs.eclipse.org/173458 (camel case completion)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IASTFieldReference;
import org.eclipse.cdt.core.dom.ast.IASTIdExpression;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNameOwner;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclaration;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.ICPPASTCompletionContext;
import org.eclipse.cdt.core.dom.ast.IEnumerator;
import org.eclipse.cdt.core.dom.ast.IField;
import org.eclipse.cdt.core.dom.ast.IScope;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTConversionName;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTOperatorName;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTQualifiedName;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTTemplateId;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassScope;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPConstructor;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPMethod;
import org.eclipse.cdt.core.model.IEnumeration;
import org.eclipse.cdt.core.parser.Keywords;
import org.eclipse.cdt.core.parser.util.ArrayUtil;
import org.eclipse.cdt.core.parser.util.CharArrayUtils;
import org.eclipse.cdt.internal.core.dom.parser.IASTInternalNameOwner;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPSemantics;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPVisitor;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil;
import org.eclipse.cdt.internal.core.parser.util.ContentAssistMatcherFactory;
import org.eclipse.core.runtime.Assert;
/**
* Qualified name, which can contain any other name (unqualified, operator-name, conversion name,
* template id).
*/
public class CPPASTQualifiedName extends CPPASTNameBase
implements ICPPASTQualifiedName, ICPPASTCompletionContext {
private IASTName[] names;
private int namesPos= -1;
private boolean isFullyQualified;
private char[] signature;
public CPPASTQualifiedName() {
}
public CPPASTQualifiedName copy() {
return copy(CopyStyle.withoutLocations);
}
public CPPASTQualifiedName copy(CopyStyle style) {
CPPASTQualifiedName copy = new CPPASTQualifiedName();
for (IASTName name : getNames())
copy.addName(name == null ? null : name.copy(style));
copy.setFullyQualified(isFullyQualified);
copy.setOffsetAndLength(this);
if (style == CopyStyle.withLocations) {
copy.setCopyLocation(this);
}
return copy;
}
@Override
public final IBinding resolvePreBinding() {
// The full qualified name resolves to the same thing as the last name
return getLastName().resolvePreBinding();
}
@Override
public IBinding resolveBinding() {
// The full qualified name resolves to the same thing as the last name
IASTName lastName= getLastName();
return lastName == null ? null : lastName.resolveBinding();
}
@Override
public final IBinding getPreBinding() {
// The full qualified name resolves to the same thing as the last name
return getLastName().getPreBinding();
}
@Override
public IBinding getBinding() {
return getLastName().getBinding();
}
@Override
public void setBinding(IBinding binding) {
getLastName().setBinding(binding);
}
public void addName(IASTName name) {
assertNotFrozen();
assert !(name instanceof ICPPASTQualifiedName);
if (name != null) {
names = (IASTName[]) ArrayUtil.append(IASTName.class, names, ++namesPos, name);
name.setParent(this);
name.setPropertyInParent(SEGMENT_NAME);
}
}
public IASTName[] getNames() {
if (namesPos < 0)
return IASTName.EMPTY_NAME_ARRAY;
names = (IASTName[]) ArrayUtil.removeNullsAfter(IASTName.class, names, namesPos);
return names;
}
@Override
public IASTName getLastName() {
if (namesPos < 0)
return null;
return names[namesPos];
}
public char[] getSimpleID() {
return names[namesPos].getSimpleID();
}
public char[] getLookupKey() {
return names[namesPos].getLookupKey();
}
public char[] toCharArray() {
if (signature == null) {
StringBuilder buf= new StringBuilder();
for (int i = 0; i <= namesPos; i++) {
if (i > 0 || isFullyQualified) {
buf.append(Keywords.cpCOLONCOLON);
}
buf.append(names[i].toCharArray());
}
final int len= buf.length();
signature= new char[len];
buf.getChars(0, len, signature, 0);
}
return signature;
}
public boolean isFullyQualified() {
return isFullyQualified;
}
public void setFullyQualified(boolean isFullyQualified) {
assertNotFrozen();
this.isFullyQualified = isFullyQualified;
}
/**
* @deprecated there is no need to set the signature, it will be computed lazily.
*/
@Deprecated
public void setSignature(String signature) {
}
@Override
public boolean accept(ASTVisitor action) {
if (action.shouldVisitNames) {
switch (action.visit(this)) {
case ASTVisitor.PROCESS_ABORT:
return false;
case ASTVisitor.PROCESS_SKIP:
return true;
default:
break;
}
}
for (int i = 0; i <= namesPos; i++) {
final IASTName name = names[i];
if (i == namesPos) {
// pointer-to-member qualified names have a dummy name as the last part of the name, don't visit it
if (name.getLookupKey().length > 0 && !name.accept(action))
return false;
} else if (!name.accept(action))
return false;
}
if (action.shouldVisitNames) {
switch (action.leave(this)) {
case ASTVisitor.PROCESS_ABORT:
return false;
case ASTVisitor.PROCESS_SKIP:
return true;
default:
break;
}
}
return true;
}
@Override
public int getRoleOfName(boolean allowResolution) {
IASTNode parent = getParent();
if (parent instanceof IASTInternalNameOwner) {
return ((IASTInternalNameOwner) parent).getRoleForName(this, allowResolution);
}
if (parent instanceof IASTNameOwner) {
return ((IASTNameOwner) parent).getRoleForName(this);
}
return IASTNameOwner.r_unclear;
}
public int getRoleForName(IASTName n) {
for (int i=0; i < namesPos; ++i) {
if (names[i] == n)
return r_reference;
}
if (getLastName() == n) {
IASTNode p = getParent();
if (p instanceof IASTNameOwner) {
return ((IASTNameOwner)p).getRoleForName(this);
}
}
return r_unclear;
}
public boolean isConversionOrOperator() {
final IASTName lastName= getLastName();
if (lastName instanceof ICPPASTConversionName || lastName instanceof ICPPASTOperatorName) {
return true;
}
// check templateId's name
if (lastName instanceof ICPPASTTemplateId) {
IASTName tempName = ((ICPPASTTemplateId)lastName).getTemplateName();
if (tempName instanceof ICPPASTConversionName || tempName instanceof ICPPASTOperatorName) {
return true;
}
}
return false;
}
public IBinding[] findBindings(IASTName n, boolean isPrefix, String[] namespaces) {
IBinding[] bindings = CPPSemantics.findBindingsForContentAssist(n, isPrefix, namespaces);
if (namesPos > 0) {
IBinding binding = names[namesPos-1].resolveBinding();
if (binding instanceof ICPPClassType) {
ICPPClassType classType = (ICPPClassType) binding;
final boolean isDeclaration = getParent().getParent() instanceof IASTSimpleDeclaration;
List<IBinding> filtered = filterClassScopeBindings(classType, bindings, isDeclaration);
if (isDeclaration && nameMatches(classType.getNameCharArray(),
n.getLookupKey(), isPrefix)) {
ICPPConstructor[] constructors = classType.getConstructors();
for (int i = 0; i < constructors.length; i++) {
if (!constructors[i].isImplicit()) {
filtered.add(constructors[i]);
}
}
}
return filtered.toArray(new IBinding[filtered.size()]);
}
}
return bindings;
}
private boolean canBeFieldAccess(ICPPClassType baseClass) {
IASTNode parent= getParent();
if (parent instanceof IASTFieldReference) {
return true;
}
if (parent instanceof IASTIdExpression) {
IScope scope= CPPVisitor.getContainingScope(this);
try {
while(scope != null) {
if (scope instanceof ICPPClassScope) {
ICPPClassType classType = ((ICPPClassScope) scope).getClassType();
if (SemanticUtil.calculateInheritanceDepth(classType, baseClass) >= 0) {
return true;
}
}
scope= scope.getParent();
}
} catch (DOMException e) {
}
}
return false;
}
private List<IBinding> filterClassScopeBindings(ICPPClassType classType,
IBinding[] bindings, final boolean isDeclaration) {
List<IBinding> filtered = new ArrayList<IBinding>();
final boolean canBeFieldAccess= canBeFieldAccess(classType);
for (final IBinding binding : bindings) {
if (binding instanceof IField) {
IField field = (IField) binding;
if (!canBeFieldAccess && !field.isStatic())
continue;
} else if (binding instanceof ICPPMethod) {
ICPPMethod method = (ICPPMethod) binding;
if (method.isImplicit())
continue;
if (!isDeclaration) {
if (method.isDestructor() || method instanceof ICPPConstructor
|| (!canBeFieldAccess && !method.isStatic()))
continue;
}
} else if (binding instanceof IEnumerator || binding instanceof IEnumeration) {
if (isDeclaration)
continue;
} else if (binding instanceof IType) {
IType type = (IType) binding;
if (type.isSameType(classType))
continue;
}
filtered.add(binding);
}
return filtered;
}
private boolean nameMatches(char[] potential, char[] name, boolean isPrefix) {
if (isPrefix)
return ContentAssistMatcherFactory.getInstance().match(name, potential);
return CharArrayUtils.equals(potential, name);
}
@Override
protected IBinding createIntermediateBinding() {
Assert.isLegal(false);
return null;
}
public IBinding[] findBindings(IASTName n, boolean isPrefix) {
return findBindings(n, isPrefix, null);
}
}