Java tutorial
/** * This file Copyright (c) 2005-2008 Aptana, Inc. This program is * dual-licensed under both the Aptana Public License and the GNU General * Public license. You may elect to use one or the other of these licenses. * * This program is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. Redistribution, except as permitted by whichever of * the GPL or APL you select, is prohibited. * * 1. For the GPL license (GPL), you can redistribute and/or modify this * program under the terms of the GNU General Public License, * Version 3, as published by the Free Software Foundation. You should * have received a copy of the GNU General Public License, Version 3 along * with this program; if not, write to the Free Software Foundation, Inc., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Aptana provides a special exception to allow redistribution of this file * with certain other free and open source software ("FOSS") code and certain additional terms * pursuant to Section 7 of the GPL. You may view the exception and these * terms on the web at http://www.aptana.com/legal/gpl/. * * 2. For the Aptana Public License (APL), this program and the * accompanying materials are made available under the terms of the APL * v1.0 which accompanies this distribution, and is available at * http://www.aptana.com/legal/apl/. * * You may view the GPL, Aptana's exception and additional terms, and the * APL in the file titled license.html at the root of the corresponding * plugin containing this source file. * * Any modifications to this file must keep this entire header intact. */ package com.aptana.ide.debug.internal.ui.actions; import java.util.Iterator; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.debug.core.DebugException; import org.eclipse.debug.core.DebugPlugin; import org.eclipse.debug.core.IExpressionManager; import org.eclipse.debug.core.ILaunch; import org.eclipse.debug.core.model.IDebugElement; import org.eclipse.debug.core.model.IVariable; import org.eclipse.debug.core.model.IWatchExpression; import org.eclipse.debug.ui.DebugUITools; import org.eclipse.debug.ui.IDebugUIConstants; import org.eclipse.jface.action.IAction; import org.eclipse.jface.text.ITextSelection; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.ui.IEditorActionDelegate; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IViewActionDelegate; import org.eclipse.ui.IViewPart; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchWindow; import org.eclipse.ui.IWorkbenchWindowActionDelegate; import org.eclipse.ui.PartInitException; import com.aptana.ide.debug.ui.DebugUiPlugin; /** * @author Max Stepanov */ public class WatchAction implements IWorkbenchWindowActionDelegate, IEditorActionDelegate, IViewActionDelegate { private ISelection fSelection; /** * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#dispose() */ public void dispose() { } /** * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#init(org.eclipse.ui.IWorkbenchWindow) */ public void init(IWorkbenchWindow window) { } /** * @see org.eclipse.ui.IViewActionDelegate#init(org.eclipse.ui.IViewPart) */ public void init(IViewPart view) { } /** * @see org.eclipse.ui.IEditorActionDelegate#setActiveEditor(org.eclipse.jface.action.IAction, * org.eclipse.ui.IEditorPart) */ public void setActiveEditor(IAction action, IEditorPart targetEditor) { } /** * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction) */ public void run(IAction action) { if (fSelection == null) { return; } if (fSelection instanceof IStructuredSelection) { Iterator iter = ((IStructuredSelection) fSelection).iterator(); while (iter.hasNext()) { IVariable variable = (IVariable) iter.next(); try { createExpression(variable.getName()); } catch (DebugException e) { DebugUiPlugin.errorDialog(Messages.WatchAction_CreateWatchExpressionFailed, e); } } } else if (fSelection instanceof ITextSelection) { String expressionText = ((ITextSelection) fSelection).getText(); if (expressionText.length() > 0) { createExpression(expressionText); } } } /** * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, * org.eclipse.jface.viewers.ISelection) */ public void selectionChanged(IAction action, ISelection selection) { fSelection = null; if (!action.isEnabled()) { return; } int enabled = 0; int size = -1; if (selection instanceof IStructuredSelection) { fSelection = selection; IStructuredSelection sSelection = (IStructuredSelection) selection; size = sSelection.size(); IExpressionManager manager = DebugPlugin.getDefault().getExpressionManager(); Iterator iterator = sSelection.iterator(); while (iterator.hasNext()) { IVariable variable = (IVariable) iterator.next(); if (manager.hasWatchExpressionDelegate(variable.getModelIdentifier())) { enabled++; } else { break; } } if (enabled != size) { action.setEnabled(false); } } else if (selection instanceof ITextSelection) { fSelection = selection; ITextSelection tSelection = (ITextSelection) selection; if (tSelection.getLength() == 0) { action.setEnabled(false); } } } /** * showExpressionsView */ protected void showExpressionsView() { IWorkbenchPage page = DebugUiPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow().getActivePage(); IViewPart part = page.findView(IDebugUIConstants.ID_EXPRESSION_VIEW); if (part == null) { try { page.showView(IDebugUIConstants.ID_EXPRESSION_VIEW); } catch (PartInitException e) { } } else { page.bringToTop(part); } } /** * createExpression * * @param expressionText */ protected void createExpression(String expressionText) { IWatchExpression expression; expression = DebugPlugin.getDefault().getExpressionManager().newWatchExpression(expressionText); DebugPlugin.getDefault().getExpressionManager().addExpression(expression); IAdaptable object = DebugUITools.getDebugContext(); IDebugElement context = null; if (object instanceof IDebugElement) { context = (IDebugElement) object; } else if (object instanceof ILaunch) { context = ((ILaunch) object).getDebugTarget(); } expression.setExpressionContext(context); showExpressionsView(); } }