| /******************************************************************************* |
| * Copyright (c) 2004, 2011 Tasktop Technologies and others. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * https://www.eclipse.org/legal/epl-2.0 |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Tasktop Technologies - initial API and implementation |
| * Christian Dupuis - bug 193003 |
| * David Green - fix for bug 261446 |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.context.ui; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IProject; |
| import org.eclipse.core.resources.IProjectNature; |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.jface.viewers.TreePath; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| import org.eclipse.mylyn.commons.core.StatusHandler; |
| import org.eclipse.mylyn.context.core.AbstractContextStructureBridge; |
| import org.eclipse.mylyn.context.core.ContextCore; |
| import org.eclipse.mylyn.context.core.IImplicitlyIntersting; |
| import org.eclipse.mylyn.context.core.IInteractionContext; |
| import org.eclipse.mylyn.context.core.IInteractionElement; |
| import org.eclipse.mylyn.internal.context.core.CompositeContextElement; |
| import org.eclipse.mylyn.internal.context.ui.ContextUiPlugin; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.ui.internal.WorkingSet; |
| |
| /** |
| * A generic degree-of-interest viewer filter that can be applied to any StructuredViewer. It figures out whether an |
| * object is interesting by getting it's handle from the corresponding structure bridge. |
| * |
| * @author Mik Kersten |
| * @since 2.0 |
| */ |
| public class InterestFilter extends ViewerFilter { |
| |
| private Set<Object> temporarilyUnfiltered = null; |
| |
| private Object lastTemporarilyUnfiltered = null; |
| |
| private IInteractionContext context; |
| |
| public InterestFilter() { |
| // ignore |
| } |
| |
| /** |
| * @since 3.6 |
| */ |
| public InterestFilter(IInteractionContext context) { |
| this.context = context; |
| |
| } |
| |
| @Override |
| public boolean select(Viewer viewer, Object parent, Object object) { |
| try { |
| if (!(viewer instanceof StructuredViewer)) {// || !containsMylarInterestFilter((StructuredViewer) viewer)) { |
| return true; |
| } |
| if (isTemporarilyUnfiltered(parent)) { |
| return true; |
| } else if (temporarilyUnfiltered != null && temporarilyUnfiltered.contains(Tree.class) |
| && (isRootElement(object) || isRootElement(viewer, parent, object))) { |
| return true; |
| } |
| |
| IInteractionElement element = null; |
| if (object instanceof IImplicitlyIntersting) { |
| return true; |
| } else if (object instanceof IInteractionElement) { |
| element = (IInteractionElement) object; |
| } else { |
| AbstractContextStructureBridge bridge = ContextCore.getStructureBridge(object); |
| if (bridge.getContentType() == null) { |
| // try to resolve the resource |
| if (object instanceof IAdaptable) { |
| Object adapted = ((IAdaptable) object).getAdapter(IResource.class); |
| if (adapted instanceof IResource) { |
| object = adapted; |
| } |
| bridge = ContextCore.getStructureBridge(object); |
| } else { |
| return false; |
| } |
| } |
| if (!bridge.canFilter(object)) { |
| return true; |
| } |
| |
| if (!object.getClass().getName().equals(Object.class.getCanonicalName())) { |
| String handle = bridge.getHandleIdentifier(object); |
| if (context == null) { |
| element = ContextCore.getContextManager().getElement(handle); |
| } else { |
| element = context.get(handle); |
| } |
| |
| // if we can't find the element, check the parent bridge |
| if (element == null |
| || (element instanceof CompositeContextElement && ((CompositeContextElement) element).getNodes() |
| .isEmpty())) { |
| String parentContentType = bridge.getParentContentType(); |
| AbstractContextStructureBridge parentBridge = ContextCore.getStructureBridge(parentContentType); |
| if (parentBridge != null) { |
| String parentHandle = parentBridge.getHandleIdentifier(object); |
| IInteractionElement parentElement; |
| if (context == null) { |
| parentElement = ContextCore.getContextManager().getElement(parentHandle); |
| } else { |
| parentElement = context.get(parentHandle); |
| } |
| if (parentElement != null && isInteresting(parentElement)) { |
| // do a sanity check to make sure that we are trying to display the element |
| // and not some other representation |
| // If this is removed, you can see the undesired behavior of the parent default |
| // packages showing up in the package explorer |
| Object objectForHandle = parentBridge.getObjectForHandle(parentHandle); |
| return objectForHandle != null && objectForHandle.equals(object); |
| } |
| } |
| } |
| |
| } else { |
| return true; |
| } |
| } |
| if (element != null) { |
| return isInteresting(element); |
| } |
| } catch (Throwable t) { |
| StatusHandler.log(new Status(IStatus.ERROR, ContextUiPlugin.ID_PLUGIN, "Interest filter failed on viewer: " //$NON-NLS-1$ |
| + viewer.getClass(), t)); |
| } |
| return false; |
| } |
| |
| private boolean isRootElement(Viewer viewer, Object parent, Object object) { |
| if (viewer.getInput() == parent) { |
| return true; |
| } |
| return false; |
| } |
| |
| protected boolean isRootElement(Object object) { |
| return object instanceof IProjectNature || object instanceof IProject || object instanceof WorkingSet; |
| } |
| |
| protected boolean isInteresting(IInteractionElement element) { |
| // FIXME temporarily disabled, see bug 210011 |
| // if (element.getInterest().isPredicted()) { |
| // return false; |
| // } else { |
| return element.getInterest().isInteresting(); |
| // } |
| } |
| |
| /** |
| * @since 3.5 |
| */ |
| public boolean isTemporarilyUnfiltered(Object parent) { |
| if (parent instanceof TreePath) { |
| TreePath treePath = (TreePath) parent; |
| parent = treePath.getLastSegment(); |
| } |
| return temporarilyUnfiltered != null && temporarilyUnfiltered.contains(parent); |
| |
| } |
| |
| @Deprecated |
| public void setTemporarilyUnfiltered(Object temporarilyUnfiltered) { |
| addTemporarilyUnfiltered(temporarilyUnfiltered); |
| } |
| |
| /** |
| * @since 3.5 |
| */ |
| public void addTemporarilyUnfiltered(Object temporarilyUnfilteredObject) { |
| if (temporarilyUnfiltered == null) { |
| temporarilyUnfiltered = new HashSet<Object>(); |
| } |
| if (temporarilyUnfilteredObject instanceof Tree) { |
| this.temporarilyUnfiltered.add(Tree.class); |
| } else { |
| // make sure to remove the tree so that we dont have weird performance issues |
| this.temporarilyUnfiltered.remove(Tree.class); |
| this.temporarilyUnfiltered.add(temporarilyUnfilteredObject); |
| } |
| this.lastTemporarilyUnfiltered = temporarilyUnfilteredObject; |
| } |
| |
| /** |
| * @return true if there was an unfiltered node |
| */ |
| public boolean resetTemporarilyUnfiltered() { |
| if (temporarilyUnfiltered != null || lastTemporarilyUnfiltered != null) { |
| this.temporarilyUnfiltered = null; |
| this.lastTemporarilyUnfiltered = null; |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * @since 3.5 |
| */ |
| public Object getLastTemporarilyUnfiltered() { |
| return lastTemporarilyUnfiltered; |
| } |
| |
| @Deprecated |
| public Object getTemporarilyUnfiltered() { |
| return getLastTemporarilyUnfiltered(); |
| } |
| |
| } |