| /******************************************************************************* |
| * Copyright (c) 2007, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.ui.dialogs; |
| |
| import java.util.*; |
| import org.eclipse.e4.ui.dialogs.filteredtree.FilteredTree; |
| import org.eclipse.e4.ui.dialogs.filteredtree.PatternFilter; |
| import org.eclipse.equinox.internal.p2.ui.ProvUI; |
| import org.eclipse.equinox.internal.p2.ui.ProvUIProvisioningListener; |
| import org.eclipse.equinox.internal.p2.ui.model.InstalledIUElement; |
| import org.eclipse.equinox.internal.p2.ui.model.ProfileElement; |
| import org.eclipse.equinox.internal.p2.ui.viewers.*; |
| import org.eclipse.equinox.p2.metadata.IInstallableUnit; |
| import org.eclipse.equinox.p2.ui.ProvisioningUI; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Font; |
| import org.eclipse.swt.widgets.*; |
| |
| /** |
| * An InstalledIUGroup is a reusable UI component that displays the IU's in a |
| * given profile. |
| * |
| * @since 3.4 |
| */ |
| public class InstalledIUGroup extends StructuredIUGroup { |
| |
| private String profileId; |
| |
| /** |
| * Create a group that represents the installed IU's. |
| * |
| * @param parent the parent composite for the group |
| * @param font The font to use for calculating pixel sizes. This font is |
| * not managed by the receiver. |
| * @param profileId the id of the profile whose content is being shown. |
| * @param columnConfig the columns to be shown |
| */ |
| public InstalledIUGroup(ProvisioningUI ui, final Composite parent, Font font, String profileId, |
| IUColumnConfig[] columnConfig) { |
| super(ui, parent, font, columnConfig); |
| if (profileId == null) |
| this.profileId = ui.getProfileId(); |
| else |
| this.profileId = profileId; |
| createGroupComposite(parent); |
| } |
| |
| @Override |
| protected StructuredViewer createViewer(Composite parent) { |
| // Table of installed IU's |
| FilteredTree filteredTree = new FilteredTree(parent, |
| SWT.MULTI | SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER, new PatternFilter()); |
| filteredTree.getFilterControl().setFocus(); // Steal focus, consistent with |
| // org.eclipse.ui.internal.about.AboutPluginsPage |
| TreeViewer installedIUViewer = filteredTree.getViewer(); |
| |
| // Filters and sorters before establishing content, so we don't refresh |
| // unnecessarily. |
| IUComparator comparator = new IUComparator(IUComparator.IU_NAME); |
| comparator.useColumnConfig(getColumnConfig()); |
| installedIUViewer.setComparator(comparator); |
| installedIUViewer.setComparer(new ProvElementComparer()); |
| |
| // Now the content. |
| // Specialize the content provider for performance optimization. |
| // See https://bugs.eclipse.org/bugs/show_bug.cgi?id=550265 |
| installedIUViewer.setContentProvider(new DeferredQueryContentProvider() { |
| /** |
| * A cache for mapping each element to its children. |
| */ |
| private final Map<Object, Object[]> elementChildren = new HashMap<>(); |
| |
| /** |
| * A cache for mapping each IU to that IU's children. |
| */ |
| private final Map<IInstallableUnit, Set<IInstallableUnit>> iuChildren = new HashMap<>(); |
| |
| @Override |
| public boolean hasChildren(Object element) { |
| // Delegate to getChildren so that all children are always cached. |
| return getChildren(element).length != 0; |
| } |
| |
| @Override |
| public Object[] getChildren(Object element) { |
| Object[] objects = elementChildren.get(element); |
| if (objects == null) { |
| if (element instanceof InstalledIUElement) { |
| // Special case handling. |
| InstalledIUElement installedIUElement = (InstalledIUElement) element; |
| if (!installedIUElement.shouldShowChildren()) { |
| // If the element shouldn't show children because that would create a cycle, |
| // don't show any. |
| objects = new Object[0]; |
| elementChildren.put(element, objects); |
| return objects; |
| } |
| |
| // If the children for this IU have already been computed. |
| String localProfileId = installedIUElement.getProfileId(); |
| IInstallableUnit iu = installedIUElement.getIU(); |
| Set<IInstallableUnit> children = iuChildren.get(iu); |
| if (children != null) { |
| // Bypass the expensive query computation because we already know the IU |
| // children from a previous expensive computation. |
| Set<InstalledIUElement> elementIUChildren = new LinkedHashSet<>(); |
| for (IInstallableUnit childIU : children) { |
| elementIUChildren.add(new InstalledIUElement(element, localProfileId, childIU)); |
| } |
| |
| objects = elementIUChildren.toArray(); |
| elementChildren.put(element, objects); |
| return objects; |
| } |
| } |
| |
| // Get the children the normal ways and cache them. |
| objects = super.getChildren(element); |
| elementChildren.put(element, objects); |
| |
| // If there are children and this is an InstalledIUElement, cache the mapping |
| // from the IU to the child IUs for reuse above. |
| if (objects.length != 0 && element instanceof InstalledIUElement) { |
| InstalledIUElement installedIUElement = (InstalledIUElement) element; |
| IInstallableUnit iu = installedIUElement.getIU(); |
| Set<IInstallableUnit> children = new LinkedHashSet<>(); |
| for (Object object : objects) { |
| if (object instanceof InstalledIUElement) { |
| InstalledIUElement childInstalledIUElement = (InstalledIUElement) object; |
| IInstallableUnit childIU = childInstalledIUElement.getIU(); |
| children.add(childIU); |
| } else { |
| // In case all the children are not also InstalledIUElement, which shouldn't |
| // happen. |
| return objects; |
| } |
| } |
| iuChildren.put(iu, children); |
| } |
| } |
| return objects; |
| } |
| }); |
| |
| // Now the visuals, columns before labels. |
| setTreeColumns(installedIUViewer.getTree()); |
| installedIUViewer.setLabelProvider(new IUDetailsLabelProvider(null, getColumnConfig(), null)); |
| |
| // Input last. |
| installedIUViewer.setInput(getInput()); |
| |
| final StructuredViewerProvisioningListener listener = new StructuredViewerProvisioningListener( |
| getClass().getName(), installedIUViewer, |
| ProvUIProvisioningListener.PROV_EVENT_IU | ProvUIProvisioningListener.PROV_EVENT_PROFILE, |
| getProvisioningUI().getOperationRunner()); |
| ProvUI.getProvisioningEventBus(getProvisioningUI().getSession()).addListener(listener); |
| installedIUViewer.getControl().addDisposeListener( |
| e -> ProvUI.getProvisioningEventBus(getProvisioningUI().getSession()).removeListener(listener)); |
| return installedIUViewer; |
| } |
| |
| private void setTreeColumns(Tree tree) { |
| IUColumnConfig[] columns = getColumnConfig(); |
| tree.setHeaderVisible(true); |
| |
| for (int i = 0; i < columns.length; i++) { |
| TreeColumn tc = new TreeColumn(tree, SWT.NONE, i); |
| tc.setResizable(true); |
| tc.setText(columns[i].getColumnTitle()); |
| tc.setWidth(columns[i].getWidthInPixels(tree)); |
| } |
| } |
| |
| Object getInput() { |
| ProfileElement element = new ProfileElement(null, profileId); |
| return element; |
| } |
| |
| /** |
| * Get the viewer used to represent the installed IU's |
| */ |
| @Override |
| public StructuredViewer getStructuredViewer() { |
| return super.getStructuredViewer(); |
| } |
| |
| @Override |
| public Control getDefaultFocusControl() { |
| return super.getDefaultFocusControl(); |
| } |
| } |