| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.ui.internal.console; |
| |
| import java.net.URL; |
| |
| import org.eclipse.core.expressions.EvaluationContext; |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.ExpressionConverter; |
| import org.eclipse.core.expressions.ExpressionTagNames; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.FileLocator; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.Path; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.ui.IPluginContribution; |
| import org.eclipse.ui.console.ConsolePlugin; |
| import org.eclipse.ui.console.IConsoleFactory; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * @since 3.1 |
| */ |
| public class ConsoleFactoryExtension implements IPluginContribution { |
| |
| private IConfigurationElement fConfig; |
| private Expression fEnablementExpression; |
| private String fLabel; |
| private ImageDescriptor fImageDescriptor; |
| private IConsoleFactory fFactory; |
| |
| ConsoleFactoryExtension(IConfigurationElement config) { |
| fConfig = config; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IPluginContribution#getLocalId() |
| */ |
| public String getLocalId() { |
| return fConfig.getAttribute("id"); //$NON-NLS-1$ |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IPluginContribution#getPluginId() |
| */ |
| public String getPluginId() { |
| return fConfig.getContributor().getName(); |
| } |
| |
| public boolean isEnabled() { |
| try { |
| Expression enablementExpression = getEnablementExpression(); |
| if (enablementExpression == null) { |
| return true; |
| } |
| EvaluationContext context = new EvaluationContext(null, this); |
| EvaluationResult evaluationResult = enablementExpression.evaluate(context); |
| return evaluationResult != EvaluationResult.FALSE; |
| } catch (CoreException e) { |
| ConsolePlugin.log(e); |
| return false; |
| } |
| } |
| |
| public Expression getEnablementExpression() throws CoreException { |
| if (fEnablementExpression == null) { |
| IConfigurationElement[] elements = fConfig.getChildren(ExpressionTagNames.ENABLEMENT); |
| IConfigurationElement enablement = elements.length > 0 ? elements[0] : null; |
| |
| if (enablement != null) { |
| fEnablementExpression = ExpressionConverter.getDefault().perform(enablement); |
| } |
| } |
| return fEnablementExpression; |
| } |
| |
| public String getLabel() { |
| if (fLabel == null) { |
| fLabel = fConfig.getAttribute("label"); //$NON-NLS-1$ |
| } |
| return fLabel; |
| } |
| |
| /** |
| * @return |
| */ |
| public ImageDescriptor getImageDescriptor() { |
| if (fImageDescriptor == null) { |
| String path = fConfig.getAttribute("icon"); //$NON-NLS-1$ |
| if (path != null) { |
| Bundle bundle = Platform.getBundle(getPluginId()); |
| URL url = FileLocator.find(bundle, new Path(path), null); |
| if (url != null) { |
| fImageDescriptor = ImageDescriptor.createFromURL(url); |
| } |
| } |
| } |
| return fImageDescriptor; |
| } |
| |
| /** |
| * @return |
| * @throws CoreException |
| */ |
| public IConsoleFactory createFactory() throws CoreException { |
| if (fFactory == null) { |
| fFactory = (IConsoleFactory) fConfig.createExecutableExtension("class"); //$NON-NLS-1$ |
| } |
| return fFactory; |
| } |
| } |