| /******************************************************************************* |
| * Copyright (c) 2005, 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.navigator.wizards; |
| |
| import java.util.Iterator; |
| |
| import org.eclipse.core.expressions.ElementHandler; |
| 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.IEvaluationContext; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.ui.IPluginContribution; |
| import org.eclipse.ui.WorkbenchException; |
| import org.eclipse.ui.internal.navigator.NavigatorPlugin; |
| import org.eclipse.ui.internal.navigator.extensions.INavigatorContentExtPtConstants; |
| |
| /** |
| * <p> |
| * <strong>EXPERIMENTAL</strong>. This class or interface has been added as |
| * part of a work in progress. There is a guarantee neither that this API will |
| * work nor that it will remain the same. Please do not use this API without |
| * consulting with the Platform/UI team. |
| * </p> |
| * |
| * @since 3.2 |
| */ |
| public class CommonWizardDescriptor implements INavigatorContentExtPtConstants, IPluginContribution { |
| |
| /** The default menu group id for commonWizards without a menuGroupId attribute. */ |
| public static final String DEFAULT_MENU_GROUP_ID = "all-uncategorized"; //$NON-NLS-1$ |
| |
| private String id; |
| |
| private String wizardId; |
| |
| private String menuGroupId; |
| |
| private String type; |
| |
| private Expression enablement; |
| |
| private IConfigurationElement configElement; |
| |
| /** |
| * @param aConfigElement The configuration element from the extension point. |
| * @throws WorkbenchException |
| * if the configuration element could not be parsed. Reasons |
| * include: |
| * <ul> |
| * <li>A required attribute is missing.</li> |
| * <li>More elements are define than is allowed.</li> |
| * </ul> |
| */ |
| public CommonWizardDescriptor(IConfigurationElement aConfigElement) |
| throws WorkbenchException { |
| super(); |
| configElement = aConfigElement; |
| init(); |
| } |
| |
| /** |
| * @param aConfigElement The configuration element from the extension point. |
| * @param anId the identifier for visibility purposes. |
| * |
| * @throws WorkbenchException |
| * if the configuration element could not be parsed. Reasons |
| * include: |
| * <ul> |
| * <li>A required attribute is missing.</li> |
| * <li>More elements are define than is allowed.</li> |
| * </ul> |
| */ |
| public CommonWizardDescriptor(IConfigurationElement aConfigElement, String anId) |
| throws WorkbenchException { |
| super(); |
| configElement = aConfigElement; |
| id = anId; |
| init(); |
| |
| } |
| |
| /** |
| * Determine if this content extension is enabled for the given selection. |
| * The content extension is enabled for the selection if and only if it is |
| * enabled for each element in the selection. |
| * |
| * @param aStructuredSelection |
| * The selection from the viewer |
| * @return True if and only if the extension is enabled for each element in |
| * the selection. |
| */ |
| public boolean isEnabledFor(IStructuredSelection aStructuredSelection) { |
| if (enablement == null) { |
| return false; |
| } |
| |
| IEvaluationContext context = null; |
| |
| Iterator elements = aStructuredSelection.iterator(); |
| while (elements.hasNext()) { |
| context = new EvaluationContext(null, elements.next()); |
| context.setAllowPluginActivation(true); |
| try { |
| if (enablement.evaluate(context) == EvaluationResult.FALSE) { |
| return false; |
| } |
| } catch (CoreException e) { |
| NavigatorPlugin.log(IStatus.ERROR, 0, e.getMessage(), e); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Determine if this content extension is enabled for the given element. |
| * |
| * @param anElement |
| * The element that should be used for the evaluation. |
| * @return True if and only if the extension is enabled for the element. |
| */ |
| public boolean isEnabledFor(Object anElement) { |
| |
| if (enablement == null) { |
| return false; |
| } |
| |
| try { |
| EvaluationContext context = new EvaluationContext(null, anElement); |
| context.setAllowPluginActivation(true); |
| return (enablement.evaluate(context) == EvaluationResult.TRUE); |
| } catch (CoreException e) { |
| NavigatorPlugin.log(IStatus.ERROR, 0, e.getMessage(), e); |
| } |
| return false; |
| } |
| |
| void init() throws WorkbenchException { |
| wizardId = configElement.getAttribute(ATT_WIZARD_ID); |
| type = configElement.getAttribute(ATT_TYPE); |
| |
| menuGroupId = configElement.getAttribute(ATT_MENU_GROUP_ID); |
| if(menuGroupId == null) { |
| menuGroupId = DEFAULT_MENU_GROUP_ID; |
| } |
| |
| /* |
| * The id defaults to the id of the enclosing navigatorContent extension, if any |
| * If not enclosed, this can be null initially, so it will default to the |
| * value of the associatedExtensionId |
| * |
| * Code elsewhere anticipates that this attribute may be null, so there is |
| * no need to set it to a default non-null value. Indeed, this will cause |
| * incorrect behavior. |
| * */ |
| if(id == null) { |
| id = configElement.getAttribute(ATT_ASSOCIATED_EXTENSION_ID); |
| } |
| |
| if (wizardId == null || wizardId.length() == 0) { |
| throw new WorkbenchException("Missing attribute: " + //$NON-NLS-1$ |
| ATT_WIZARD_ID + " in common wizard extension: " + //$NON-NLS-1$ |
| configElement.getDeclaringExtension().getNamespaceIdentifier()); |
| } |
| |
| if (type == null || type.length() == 0) { |
| throw new WorkbenchException("Missing attribute: " + //$NON-NLS-1$ |
| ATT_TYPE + " in common wizard extension: " + //$NON-NLS-1$ |
| configElement.getDeclaringExtension().getNamespaceIdentifier()); |
| } |
| |
| IConfigurationElement[] children = configElement |
| .getChildren(TAG_ENABLEMENT); |
| if (children.length == 1) { |
| try { |
| enablement = ElementHandler.getDefault().create( |
| ExpressionConverter.getDefault(), children[0]); |
| } catch (CoreException e) { |
| NavigatorPlugin.log(IStatus.ERROR, 0, e.getMessage(), e); |
| } |
| } else if (children.length > 1) { |
| throw new WorkbenchException("More than one element: " + //$NON-NLS-1$ |
| TAG_ENABLEMENT + " in common wizard extension: " + //$NON-NLS-1$ |
| configElement.getDeclaringExtension().getUniqueIdentifier()); |
| } |
| } |
| |
| /** |
| * |
| * @return Returns the common wizard wizardId |
| */ |
| public String getWizardId() { |
| return wizardId; |
| } |
| |
| /** |
| * @return Returns the type. |
| */ |
| public String getType() { |
| return type; |
| } |
| |
| /** |
| * @return the declaring namespace. |
| */ |
| public String getNamespace() { |
| return configElement.getDeclaringExtension().getNamespaceIdentifier(); |
| } |
| |
| /** |
| * |
| * @return The identifier of the wizard descriptor for visiblity purposes (or null) if none. |
| */ |
| public String getId() { |
| return id; |
| } |
| |
| |
| /** |
| * |
| * @return A developer-defined logical group that this wizard menu option and |
| * others like it should be rendered in a localized manner. |
| */ |
| public String getMenuGroupId() { |
| return menuGroupId; |
| } |
| |
| |
| public String toString() { |
| return "CommonWizardDescriptor["+getId()+", wizardId="+getWizardId()+"]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IPluginContribution#getLocalId() |
| */ |
| public String getLocalId() { |
| return getId(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IPluginContribution#getPluginId() |
| */ |
| public String getPluginId() { |
| return (configElement != null) ? configElement.getNamespaceIdentifier() : null; |
| } |
| } |