| /******************************************************************************* |
| * Copyright (c) 2003, 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.debug.internal.ui.sourcelookup; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.debug.core.sourcelookup.ISourceContainer; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.swt.events.SelectionAdapter; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.ui.actions.SelectionListenerAction; |
| |
| /** |
| * The abstract class for all source lookup actions. |
| * |
| * @since 3.0 |
| */ |
| public abstract class SourceContainerAction extends SelectionListenerAction { |
| //the viewer that the action is operating on |
| private SourceContainerViewer fViewer; |
| //the button that is used to invoke the action |
| private Button fButton; |
| //the shell used to realize this action's dialog (if any) |
| private Shell fShell; |
| |
| /** |
| * The constructor for the action |
| * @param label the label for the action's button |
| */ |
| public SourceContainerAction(String label) { |
| super(label); |
| } |
| |
| /** |
| * Sets the viewer on which this action operates. |
| * |
| * @param viewer the viewer on which this action operates |
| */ |
| public void setViewer(SourceContainerViewer viewer) { |
| if (fViewer != null) { |
| fViewer.removeSelectionChangedListener(this); |
| } |
| fViewer = viewer; |
| if (fViewer != null) { |
| fViewer.addSelectionChangedListener(this); |
| update(); |
| } |
| } |
| |
| /** |
| * Returns the viewer on which this action operates. |
| * |
| * @return the viewer on which this action operates |
| */ |
| protected SourceContainerViewer getViewer() { |
| return fViewer; |
| } |
| |
| /** |
| * Returns the selected items in the list, in the order they are |
| * displayed. |
| * |
| * @return targets for an action |
| */ |
| protected List<ISourceContainer> getOrderedSelection() { |
| List<ISourceContainer> targets = new ArrayList<>(); |
| List<Object> selection = getViewer().getStructuredSelection().toList(); |
| ISourceContainer[] entries = getViewer().getEntries(); |
| for (int i = 0; i < entries.length; i++) { |
| ISourceContainer target = entries[i]; |
| if (selection.contains(target)) { |
| targets.add(target); |
| } |
| } |
| return targets; |
| } |
| |
| /** |
| * Returns a list (copy) of the entries in the viewer |
| */ |
| protected List<ISourceContainer> getEntriesAsList() { |
| ISourceContainer[] entries = getViewer().getEntries(); |
| List<ISourceContainer> list = new ArrayList<>(entries.length); |
| for (int i = 0; i < entries.length; i++) { |
| list.add(entries[i]); |
| } |
| return list; |
| } |
| |
| /** |
| * Updates the entries to the entries in the given list |
| */ |
| protected void setEntries(List<ISourceContainer> list) { |
| getViewer().setEntries(list.toArray(new ISourceContainer[list.size()])); |
| // update all selection listeners |
| getViewer().setSelection(getViewer().getSelection()); |
| } |
| |
| /** |
| * Returns whether the item at the given index in the list |
| * (visually) is selected. |
| */ |
| protected boolean isIndexSelected(IStructuredSelection selection, int index) { |
| if (selection.isEmpty()) { |
| return false; |
| } |
| Iterator<Object> entries = selection.iterator(); |
| List<ISourceContainer> list = getEntriesAsList(); |
| while (entries.hasNext()) { |
| Object next = entries.next(); |
| if (list.indexOf(next) == index) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Sets the button that invokes this action |
| */ |
| public void setButton(Button button) { |
| fButton = button; |
| button.addSelectionListener(new SelectionAdapter() { |
| @Override |
| public void widgetSelected(SelectionEvent evt) { |
| run(); |
| } |
| }); |
| } |
| |
| @Override |
| public void setEnabled(boolean enabled) { |
| super.setEnabled(enabled); |
| if (fButton != null) { |
| fButton.setEnabled(enabled); |
| } |
| } |
| |
| /** |
| * Updates the enabled state. |
| */ |
| protected void update() { |
| selectionChanged(getViewer().getStructuredSelection()); |
| } |
| |
| /** |
| * Returns the shell used to realize this action's dialog (if any). |
| */ |
| protected Shell getShell() { |
| if (fShell == null) { |
| fShell = getViewer().getControl().getShell(); |
| } |
| return fShell; |
| } |
| |
| /** |
| * Sets the shell used to realize this action's dialog (if any). |
| */ |
| public void setShell(Shell shell) { |
| fShell = shell; |
| } |
| |
| } |