/*******************************************************************************
* Copyright (c) 2000, 2009 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.ui;
import java.util.List;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jdt.core.Flags;
import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaElementDelta;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.ITypeRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchConstants;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.core.search.SearchPattern;
import org.eclipse.jdt.core.search.TypeNameRequestor;
import org.eclipse.jdt.internal.corext.util.JavaModelUtil;
public class InterfaceIndicatorLabelDecorator extends AbstractJavaElementLabelDecorator {
/**
* {@inheritDoc}
*/
public void decorate(Object element, IDecoration decoration) {
try {
ImageDescriptor overlay= getOverlay(element);
if (overlay == null)
return;
decoration.addOverlay(overlay, IDecoration.TOP_RIGHT);
} catch (JavaModelException e) {
return;
}
}
private ImageDescriptor getOverlay(Object element) throws JavaModelException {
if (element instanceof ICompilationUnit) {
ICompilationUnit unit= (ICompilationUnit) element;
if (unit.isOpen()) {
IType mainType= unit.findPrimaryType();
if (mainType != null) {
return getOverlayFromFlags(mainType.getFlags());
}
return null;
}
String typeName= JavaCore.removeJavaLikeExtension(unit.getElementName());
return getOverlayWithSearchEngine(unit, typeName);
} else if (element instanceof IClassFile) {
IClassFile classFile= (IClassFile) element;
if (classFile.isOpen()) {
return getOverlayFromFlags(classFile.getType().getFlags());
}
String typeName= classFile.getType().getElementName();
return getOverlayWithSearchEngine(classFile, typeName);
}
return null;
}
private ImageDescriptor getOverlayWithSearchEngine(ITypeRoot element, String typeName) {
SearchEngine engine= new SearchEngine();
IJavaSearchScope scope= SearchEngine.createJavaSearchScope(new IJavaElement[] { element });
class Result extends RuntimeException {
private static final long serialVersionUID= 1L;
int modifiers;
public Result(int modifiers) {
this.modifiers= modifiers;
}
}
TypeNameRequestor requestor= new TypeNameRequestor() {
public void acceptType(int modifiers, char[] packageName, char[] simpleTypeName, char[][] enclosingTypeNames, String path) {
if (enclosingTypeNames.length == 0 && Flags.isPublic(modifiers)) {
throw new Result(modifiers);
}
}
};
try {
String packName = element.getParent().getElementName();
int matchRule = SearchPattern.R_EXACT_MATCH | SearchPattern.R_CASE_SENSITIVE;
engine.searchAllTypeNames(packName.toCharArray(), matchRule, typeName.toCharArray(), matchRule, IJavaSearchConstants.TYPE, scope, requestor, IJavaSearchConstants.WAIT_UNTIL_READY_TO_SEARCH , null);
} catch (Result e) {
return getOverlayFromFlags(e.modifiers);
} catch (JavaModelException e) {
JavaPlugin.log(e);
}
return null;
}
private ImageDescriptor getOverlayFromFlags(int flags) {
if (Flags.isAnnotation(flags)) {
return JavaPluginImages.DESC_OVR_ANNOTATION;
} else if (Flags.isEnum(flags)) {
return JavaPluginImages.DESC_OVR_ENUM;
} else if (Flags.isInterface(flags)) {
return JavaPluginImages.DESC_OVR_INTERFACE;
} else if (/* is class */ Flags.isAbstract(flags)) {
return JavaPluginImages.DESC_OVR_ABSTRACT_CLASS;
}
return null;
}
protected void processDelta(IJavaElementDelta delta, List result) {
IJavaElement elem= delta.getElement();
boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
int flags= delta.getFlags();
switch (elem.getElementType()) {
case IJavaElement.JAVA_PROJECT:
if (isRemoved || (isChanged &&
(flags & IJavaElementDelta.F_CLOSED) != 0)) {
return;
}
processChildrenDelta(delta, result);
return;
case IJavaElement.PACKAGE_FRAGMENT_ROOT:
if (isRemoved || (isChanged && (
(flags & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0 ||
(flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0))) {
return;
}
processChildrenDelta(delta, result);
return;
case IJavaElement.PACKAGE_FRAGMENT:
if (isRemoved)
return;
processChildrenDelta(delta, result);
return;
case IJavaElement.TYPE:
case IJavaElement.CLASS_FILE:
return;
case IJavaElement.JAVA_MODEL:
processChildrenDelta(delta, result);
return;
case IJavaElement.COMPILATION_UNIT:
// Not the primary compilation unit. Ignore it
if (!JavaModelUtil.isPrimary((ICompilationUnit) elem)) {
return;
}
if (isChanged && ((flags & IJavaElementDelta.F_CONTENT) != 0 || (flags & IJavaElementDelta.F_FINE_GRAINED) != 0)) {
if (delta.getAffectedChildren().length == 0)
return;
result.add(elem);
}
return;
default:
// fields, methods, imports ect
return;
}
}
}