| /******************************************************************************* |
| * 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 |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.internal.ui.viewsupport; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.swt.events.DisposeEvent; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Item; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.Widget; |
| |
| import org.eclipse.core.resources.IResource; |
| |
| import org.eclipse.jface.viewers.IBaseLabelProvider; |
| import org.eclipse.jface.viewers.LabelProviderChangedEvent; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| |
| import org.eclipse.jdt.core.IMember; |
| |
| import org.eclipse.jdt.ui.IWorkingCopyProvider; |
| import org.eclipse.jdt.ui.ProblemsLabelDecorator.ProblemsLabelChangedEvent; |
| |
| |
| /** |
| * Extends a TreeViewer to allow more performance when showing error ticks. |
| * A <code>ProblemItemMapper</code> is contained that maps all items in |
| * the tree to underlying resource |
| */ |
| public class ProblemTreeViewer extends TreeViewer implements ResourceToItemsMapper.IContentViewerAccessor { |
| |
| protected ResourceToItemsMapper fResourceToItemsMapper; |
| |
| /* |
| * @see TreeViewer#TreeViewer(Composite) |
| */ |
| public ProblemTreeViewer(Composite parent) { |
| super(parent); |
| initMapper(); |
| } |
| |
| /* |
| * @see TreeViewer#TreeViewer(Composite, int) |
| */ |
| public ProblemTreeViewer(Composite parent, int style) { |
| super(parent, style); |
| initMapper(); |
| } |
| |
| /* |
| * @see TreeViewer#TreeViewer(Tree) |
| */ |
| public ProblemTreeViewer(Tree tree) { |
| super(tree); |
| initMapper(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jdt.internal.ui.viewsupport.ResourceToItemsMapper.IContentViewerAccessor#doUpdateItem(org.eclipse.swt.widgets.Widget) |
| */ |
| public void doUpdateItem(Widget item) { |
| doUpdateItem(item, item.getData(), true); |
| } |
| |
| private void initMapper() { |
| fResourceToItemsMapper= new ResourceToItemsMapper(this); |
| } |
| |
| |
| /* |
| * @see StructuredViewer#mapElement(Object, Widget) |
| */ |
| @Override |
| protected void mapElement(Object element, Widget item) { |
| super.mapElement(element, item); |
| if (item instanceof Item) { |
| fResourceToItemsMapper.addToMap(element, (Item) item); |
| } |
| } |
| |
| /* |
| * @see StructuredViewer#unmapElement(Object, Widget) |
| */ |
| @Override |
| protected void unmapElement(Object element, Widget item) { |
| if (item instanceof Item) { |
| fResourceToItemsMapper.removeFromMap(element, (Item) item); |
| } |
| super.unmapElement(element, item); |
| } |
| |
| /* |
| * @see StructuredViewer#unmapAllElements() |
| */ |
| @Override |
| protected void unmapAllElements() { |
| fResourceToItemsMapper.clearMap(); |
| super.unmapAllElements(); |
| } |
| |
| |
| // ---------------- filter sessions ---------------------------- |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#addFilter(org.eclipse.jface.viewers.ViewerFilter) |
| */ |
| @Override |
| public void addFilter(ViewerFilter filter) { |
| if (filter instanceof JavaViewerFilter) { |
| ((JavaViewerFilter) filter).filteringStart(); |
| } |
| super.addFilter(filter); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#removeFilter(org.eclipse.jface.viewers.ViewerFilter) |
| */ |
| @Override |
| public void removeFilter(ViewerFilter filter) { |
| super.removeFilter(filter); |
| if (filter instanceof JavaViewerFilter) { |
| ((JavaViewerFilter) filter).filteringEnd(); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#setFilters(org.eclipse.jface.viewers.ViewerFilter[]) |
| */ |
| @Override |
| public void setFilters(ViewerFilter[] filters) { |
| ViewerFilter[] oldFilters= getFilters(); |
| for (int i= 0; i < filters.length; i++) { |
| ViewerFilter curr= filters[i]; |
| if (curr instanceof JavaViewerFilter && !findAndRemove(oldFilters, curr)) { |
| ((JavaViewerFilter) curr).filteringStart(); |
| } |
| } |
| endFilterSessions(oldFilters); |
| super.setFilters(filters); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#resetFilters() |
| */ |
| @Override |
| public void resetFilters() { |
| endFilterSessions(getFilters()); |
| super.resetFilters(); |
| } |
| |
| private boolean findAndRemove(ViewerFilter[] filters, ViewerFilter filter) { |
| for (int i= 0; i < filters.length; i++) { |
| if (filters[i] == filter) { |
| filters[i]= null; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private void endFilterSessions(ViewerFilter[] filters) { |
| for (int i= 0; i < filters.length; i++) { |
| ViewerFilter curr= filters[i]; |
| if (curr instanceof JavaViewerFilter) { |
| ((JavaViewerFilter) curr).filteringEnd(); |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#handleDispose(org.eclipse.swt.events.DisposeEvent) |
| */ |
| @Override |
| protected void handleDispose(DisposeEvent event) { |
| endFilterSessions(getFilters()); |
| super.handleDispose(event); |
| } |
| |
| |
| /* |
| * @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent) |
| */ |
| @Override |
| protected void handleLabelProviderChanged(LabelProviderChangedEvent event) { |
| if (event instanceof ProblemsLabelChangedEvent) { |
| ProblemsLabelChangedEvent e= (ProblemsLabelChangedEvent) event; |
| if (!e.isMarkerChange() && canIgnoreChangesFromAnnotionModel()) { |
| return; |
| } |
| } |
| Object[] changed= addAditionalProblemParents(event.getElements()); |
| |
| if (changed != null && !fResourceToItemsMapper.isEmpty()) { |
| ArrayList<Object> others= new ArrayList<Object>(); |
| for (int i= 0; i < changed.length; i++) { |
| Object curr= changed[i]; |
| if (curr instanceof IResource) { |
| fResourceToItemsMapper.resourceChanged((IResource) curr); |
| } else { |
| others.add(curr); |
| } |
| } |
| if (others.isEmpty()) { |
| return; |
| } |
| event= new LabelProviderChangedEvent((IBaseLabelProvider) event.getSource(), others.toArray()); |
| } else { |
| // we have modified the list of changed elements via add additional parents. |
| if (event.getElements() != changed) |
| event= new LabelProviderChangedEvent((IBaseLabelProvider) event.getSource(), changed); |
| } |
| super.handleLabelProviderChanged(event); |
| } |
| |
| /** |
| * Answers whether this viewer can ignore label provider changes resulting from |
| * marker changes in annotation models |
| * @return return <code>true</code> if annotation model marker changes can be ignored |
| */ |
| private boolean canIgnoreChangesFromAnnotionModel() { |
| Object contentProvider= getContentProvider(); |
| return contentProvider instanceof IWorkingCopyProvider && !((IWorkingCopyProvider)contentProvider).providesWorkingCopies(); |
| } |
| |
| |
| /** |
| * Decides if {@link #isExpandable(Object)} should also test filters. The default behaviour is to |
| * do this only for IMembers. Implementors can replace this behaviour. |
| * @param parent the given element |
| * @return returns if if {@link #isExpandable(Object)} should also test filters for the given element. |
| */ |
| protected boolean evaluateExpandableWithFilters(Object parent) { |
| return parent instanceof IMember; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.AbstractTreeViewer#isExpandable(java.lang.Object) |
| */ |
| @Override |
| public boolean isExpandable(Object parent) { |
| if (hasFilters() && evaluateExpandableWithFilters(parent)) { |
| // workaround for 65762 |
| return hasFilteredChildren(parent); |
| } |
| return super.isExpandable(parent); |
| } |
| |
| /** |
| * Public method to test if a element has any children that passed the filters |
| * @param parent the element to test |
| * @return return <code>true</code> if the element has at least a child that passed the filters |
| */ |
| public final boolean hasFilteredChildren(Object parent) { |
| Object[] rawChildren= getRawChildren(parent); |
| return containsNonFiltered(rawChildren, parent); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.AbstractTreeViewer#getFilteredChildren(java.lang.Object) |
| */ |
| @Override |
| protected final Object[] getFilteredChildren(Object parent) { |
| return filter(getRawChildren(parent), parent); |
| } |
| |
| private Object[] filter(Object[] elements, Object parent) { |
| if (!hasFilters() || elements.length == 0) { |
| return elements; |
| } |
| List<Object> list= new ArrayList<Object>(elements.length); |
| ViewerFilter[] filters = getFilters(); |
| for (int i = 0; i < elements.length; i++) { |
| Object object = elements[i]; |
| if (!isFiltered(object, parent, filters)) { |
| list.add(object); |
| } |
| } |
| return list.toArray(); |
| } |
| |
| private boolean containsNonFiltered(Object[] elements, Object parent) { |
| if (elements.length == 0) { |
| return false; |
| } |
| if (!hasFilters()) { |
| return true; |
| } |
| ViewerFilter[] filters = getFilters(); |
| for (int i = 0; i < elements.length; i++) { |
| Object object = elements[i]; |
| if (!isFiltered(object, parent, filters)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * All element filter tests must go through this method. |
| * Can be overridden by subclasses. |
| * |
| * @param object the object to filter |
| * @param parent the parent |
| * @param filters the filters to apply |
| * @return true if the element is filtered |
| */ |
| protected boolean isFiltered(Object object, Object parent, ViewerFilter[] filters) { |
| for (int i = 0; i < filters.length; i++) { |
| ViewerFilter filter = filters[i]; |
| if (!filter.select(this, parent, object)) |
| return true; |
| } |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.StructuredViewer#filter(java.lang.Object[]) |
| */ |
| @Override |
| protected final Object[] filter(Object[] elements) { |
| return filter(elements, getRoot()); |
| } |
| |
| protected Object[] addAditionalProblemParents(Object[] elements) { |
| return elements; |
| } |
| |
| /** |
| * Public method to test if a element is filtered by the views active filters |
| * @param object the element to test for |
| * @param parent the parent element |
| * @return return <code>true</code> if the element is filtered |
| */ |
| public boolean isFiltered(Object object, Object parent) { |
| return isFiltered(object, parent, getFilters()); |
| } |
| } |
| |