| /******************************************************************************* |
| * Copyright (c) 2011-2013 EclipseSource Muenchen GmbH and others. |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Edgar Mueller - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.emf.ecp.view.internal.rule; |
| |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.EStructuralFeature; |
| import org.eclipse.emf.ecore.EStructuralFeature.Setting; |
| import org.eclipse.emf.ecp.common.spi.UniqueSetting; |
| import org.eclipse.emf.ecp.view.spi.context.ViewModelContext; |
| import org.eclipse.emf.ecp.view.spi.context.ViewModelService; |
| import org.eclipse.emf.ecp.view.spi.model.VElement; |
| import org.eclipse.emf.ecp.view.spi.rule.RuleServiceHelper; |
| |
| /** |
| * @author emueller |
| * |
| */ |
| public class RuleServiceHelperImpl implements ViewModelService, RuleServiceHelper { |
| |
| /** |
| * A predicate that is used to determine the set of {@link VElement}s |
| * if {@link RuleServiceHelperImpl#getInvolvedEObjects(Setting, Object, Class)} is called. |
| */ |
| private interface RenderablePredicate { |
| boolean checkCurrentState(VElement renderable); |
| } |
| |
| private ViewModelContext context; |
| |
| /** |
| * @return |
| */ |
| private RenderablePredicate createDisabledRenderablePredicate() { |
| return new RenderablePredicate() { |
| @Override |
| public boolean checkCurrentState(VElement renderable) { |
| return renderable.isEnabled(); |
| } |
| }; |
| } |
| |
| /** |
| * @return |
| */ |
| private RenderablePredicate createHiddenRenderablePredicate() { |
| return new RenderablePredicate() { |
| @Override |
| public boolean checkCurrentState(VElement renderable) { |
| return renderable.isVisible(); |
| } |
| |
| }; |
| } |
| |
| @SuppressWarnings("unchecked") |
| private <T extends VElement> Set<T> collectFalseValues(Class<T> cls, |
| final Map<VElement, Boolean> renderableToStateMapping, RenderablePredicate renderablePredicate) { |
| |
| final Set<T> result = new LinkedHashSet<T>(); |
| |
| for (final Map.Entry<VElement, Boolean> entry : renderableToStateMapping.entrySet()) { |
| |
| final VElement renderable = entry.getKey(); |
| final Boolean newState = entry.getValue(); |
| if (newState) { |
| continue; |
| } |
| if (renderablePredicate.checkCurrentState(renderable) == newState) { |
| continue; |
| } |
| if (cls.isInstance(renderable)) { |
| result.add((T) renderable); |
| } |
| else { |
| EObject parent = renderable.eContainer(); |
| while (parent != null) { |
| if (cls.isInstance(parent)) { |
| result.add((T) parent); |
| break; |
| } |
| parent = parent.eContainer(); |
| } |
| } |
| |
| } |
| |
| return result; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.ecp.view.spi.context.ViewModelService#instantiate(org.eclipse.emf.ecp.view.spi.context.ViewModelContext) |
| */ |
| @Override |
| public void instantiate(ViewModelContext context) { |
| this.context = context; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.ecp.view.spi.context.ViewModelService#dispose() |
| */ |
| @Override |
| public void dispose() { |
| |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.ecp.view.spi.context.ViewModelService#getPriority() |
| */ |
| @Override |
| public int getPriority() { |
| return 2; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.emf.ecp.view.spi.rule.RuleServiceHelper#getInvolvedEObjects(org.eclipse.emf.ecore.EStructuralFeature.Setting, |
| * java.lang.Object, java.lang.Class) |
| */ |
| @Override |
| public <T extends VElement> Set<T> getInvolvedEObjects(Setting setting, Object newValue, Class<T> renderableClass) { |
| final Map<Setting, Object> newValues = new LinkedHashMap<EStructuralFeature.Setting, Object>(); |
| newValues.put(setting, newValue); |
| |
| final Map<VElement, Boolean> disabledRenderables = context.getService(RuleService.class) |
| .getDisabledRenderables(newValues, UniqueSetting.createSetting(setting)); |
| final Map<VElement, Boolean> hiddenRenderables = context.getService(RuleService.class) |
| .getHiddenRenderables(newValues, UniqueSetting.createSetting(setting)); |
| |
| final Set<T> result = new LinkedHashSet<T>(); |
| result.addAll(collectFalseValues(renderableClass, disabledRenderables, createDisabledRenderablePredicate())); |
| result.addAll(collectFalseValues(renderableClass, hiddenRenderables, createHiddenRenderablePredicate())); |
| return result; |
| } |
| } |