| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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 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.IConfigurationElement; |
| import org.eclipse.ui.IPluginContribution; |
| import org.eclipse.ui.console.IConsole; |
| import org.eclipse.ui.console.IConsolePageParticipant; |
| |
| public class ConsolePageParticipantExtension implements IPluginContribution { |
| |
| private IConfigurationElement fConfig; |
| private Expression fEnablementExpression; |
| |
| public ConsolePageParticipantExtension(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.getNamespace(); |
| } |
| |
| public boolean isEnabledFor(IConsole console) throws CoreException { |
| EvaluationContext context = new EvaluationContext(null, console); |
| EvaluationResult evaluationResult = getEnablementExpression().evaluate(context); |
| return evaluationResult == EvaluationResult.TRUE; |
| } |
| |
| 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 IConsolePageParticipant createDelegate() throws CoreException { |
| return (IConsolePageParticipant) fConfig.createExecutableExtension("class"); //$NON-NLS-1$; |
| } |
| |
| } |