/*******************************************************************************
* Copyright (c) 2000, 2008 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.getContributor().getName();
}
public boolean isEnabledFor(IConsole console) throws CoreException {
EvaluationContext context = new EvaluationContext(null, console);
Expression expression = getEnablementExpression();
if (expression != null){
EvaluationResult evaluationResult = expression.evaluate(context);
return evaluationResult == EvaluationResult.TRUE;
}
return 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"); //$NON-NLS-1$;
}
}