/*******************************************************************************
* Copyright (c) 2000, 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:
* IBM Corporation - initial API and implementation
* Eric Rizzo - Added "Collapse All" toolbar action
*******************************************************************************/
package org.eclipse.jdt.internal.ui.browsing;
import java.util.Iterator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.commands.ActionHandler;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.CollapseAllHandler;
import org.eclipse.ui.handlers.IHandlerService;
import org.eclipse.ui.part.IShowInTargetList;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaModel;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jdt.ui.PreferenceConstants;
import org.eclipse.jdt.ui.actions.ProjectActionGroup;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.CollapseAllAction;
import org.eclipse.jdt.internal.ui.viewsupport.FilterUpdater;
import org.eclipse.jdt.internal.ui.viewsupport.ProblemTreeViewer;
public class ProjectsView extends JavaBrowsingPart {
private FilterUpdater fFilterUpdater;
private CollapseAllAction fCollapseAllAction;
/* (non-Javadoc)
* @see org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#createViewer(org.eclipse.swt.widgets.Composite)
*/
@Override
protected StructuredViewer createViewer(Composite parent) {
ProblemTreeViewer result= new ProblemTreeViewer(parent, SWT.MULTI);
fFilterUpdater= new FilterUpdater(result);
ResourcesPlugin.getWorkspace().addResourceChangeListener(fFilterUpdater);
return result;
}
/* (non-Javadoc)
* @see org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#dispose()
*/
@Override
public void dispose() {
if (fFilterUpdater != null)
ResourcesPlugin.getWorkspace().removeResourceChangeListener(fFilterUpdater);
super.dispose();
}
/* (non-Javadoc)
* @see org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#getAdapter(java.lang.Class)
*/
@Override
public Object getAdapter(Class key) {
if (key == IShowInTargetList.class) {
return new IShowInTargetList() {
public String[] getShowInTargetIds() {
return new String[] { JavaUI.ID_PACKAGES, JavaPlugin.ID_RES_NAV };
}
};
}
return super.getAdapter(key);
}
/* (non-Javadoc)
* @see org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#createContentProvider()
*/
@Override
protected IContentProvider createContentProvider() {
return new ProjectAndSourceFolderContentProvider(this);
}
/**
* Returns the context ID for the Help system.
*
* @return the string used as ID for the Help context
*/
@Override
protected String getHelpContextId() {
return IJavaHelpContextIds.PROJECTS_VIEW;
}
@Override
protected String getLinkToEditorKey() {
return PreferenceConstants.LINK_BROWSING_PROJECTS_TO_EDITOR;
}
/**
* Adds additional listeners to this view.
*/
@Override
protected void hookViewerListeners() {
super.hookViewerListeners();
getViewer().addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
TreeViewer viewer= (TreeViewer)getViewer();
Object element= ((IStructuredSelection)event.getSelection()).getFirstElement();
if (viewer.isExpandable(element))
viewer.setExpandedState(element, !viewer.getExpandedState(element));
}
});
}
@Override
protected void setInitialInput() {
IJavaElement root= JavaCore.create(JavaPlugin.getWorkspace().getRoot());
getViewer().setInput(root);
updateTitle();
}
/**
* Answers if the given <code>element</code> is a valid
* input for this part.
*
* @param element the object to test
* @return <true> if the given element is a valid input
*/
@Override
protected boolean isValidInput(Object element) {
return element instanceof IJavaModel;
}
/**
* Answers if the given <code>element</code> is a valid
* element for this part.
*
* @param element the object to test
* @return <true> if the given element is a valid element
*/
@Override
protected boolean isValidElement(Object element) {
return element instanceof IJavaProject || element instanceof IPackageFragmentRoot;
}
/**
* Finds the element which has to be selected in this part.
*
* @param je the Java element which has the focus
* @return the element to select
*/
@Override
protected IJavaElement findElementToSelect(IJavaElement je) {
if (je == null)
return null;
switch (je.getElementType()) {
case IJavaElement.JAVA_MODEL :
return null;
case IJavaElement.JAVA_PROJECT:
return je;
case IJavaElement.PACKAGE_FRAGMENT_ROOT:
if (je.getElementName().equals(IPackageFragmentRoot.DEFAULT_PACKAGEROOT_PATH))
return je.getParent();
else
return je;
default :
return findElementToSelect(je.getParent());
}
}
/*
* @see JavaBrowsingPart#setInput(Object)
*/
@Override
protected void setInput(Object input) {
// Don't allow to clear input for this view
if (input != null)
super.setInput(input);
else
getViewer().setSelection(null);
}
@Override
protected void createActions() {
super.createActions();
fActionGroups.addGroup(new ProjectActionGroup(this));
fCollapseAllAction= new CollapseAllAction((TreeViewer) getViewer());
fCollapseAllAction.setActionDefinitionId(CollapseAllHandler.COMMAND_ID);
}
/*
* @see org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#activateHandlers(org.eclipse.ui.handlers.IHandlerService)
* @since 3.4
*/
@Override
protected void activateHandlers(IHandlerService handlerService) {
super.activateHandlers(handlerService);
handlerService.activateHandler(CollapseAllHandler.COMMAND_ID, new ActionHandler(fCollapseAllAction));
}
@Override
protected void fillToolBar(IToolBarManager tbm) {
super.fillToolBar(tbm);
tbm.add(fCollapseAllAction);
}
/**
* Handles selection of LogicalPackage in Packages view.
*
* @see org.eclipse.ui.ISelectionListener#selectionChanged(org.eclipse.ui.IWorkbenchPart, org.eclipse.jface.viewers.ISelection)
* @since 2.1
*/
@Override
public void selectionChanged(IWorkbenchPart part, ISelection selection) {
if (!needsToProcessSelectionChanged(part))
return;
if (selection instanceof IStructuredSelection) {
IStructuredSelection sel= (IStructuredSelection)selection;
Iterator<?> iter= sel.iterator();
while (iter.hasNext()) {
Object selectedElement= iter.next();
if (selectedElement instanceof LogicalPackage) {
selection= new StructuredSelection(((LogicalPackage)selectedElement).getJavaProject());
break;
}
}
}
super.selectionChanged(part, selection);
}
}