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/*****************************************************************************
* Copyright (c) 2014, 2016 CEA LIST, Christian W. Damus, 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:
* CEA LIST - Initial API and implementation
* Christian W. Damus - bugs 485220, 497342, 498414, 499661
*
*****************************************************************************/
package org.eclipse.papyrus.infra.services.resourceloading.internal.ui.editor;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.papyrus.infra.core.sasheditor.contentprovider.IPageModel;
import org.eclipse.papyrus.infra.core.sasheditor.di.contentprovider.utils.IPageUtils;
import org.eclipse.papyrus.infra.core.sasheditor.editor.IPage;
import org.eclipse.papyrus.infra.core.sasheditor.editor.ISashWindowsContainer;
import org.eclipse.papyrus.infra.core.sashwindows.di.service.IPageManager;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.emf.utils.ServiceUtilsForResource;
import org.eclipse.papyrus.infra.tools.util.PlatformHelper;
/**
* Command to load the diagram related to a resource URI
*
* @author Céline JANSSENS
*
*/
class LoadDiagramCommand implements Runnable {
private final IPageManager pageManager;
private final ISashWindowsContainer sashContainer;
/**
* URI of the resource which the diagram is based on.
*/
private final URI uri;
/**
* Initializes me with a page manager and sash-windows container inferred
* from the {@code resource}.
*
* @param resource
* the resource in which there may be diagrams for me to reload
* in the page manager
*/
public LoadDiagramCommand(Resource resource) {
this(resource,
getService(resource, IPageManager.class),
getService(resource, ISashWindowsContainer.class));
}
private static <S> S getService(Resource resource, Class<S> serviceAPI) {
S result = null;
try {
result = ServiceUtilsForResource.getInstance().getService(serviceAPI, resource);
} catch (ServiceException e) {
// nothing to do
}
return result;
}
/**
* Initializes me.
*
* @param resource
* the resource in which there may be diagrams for me to reload
* in the page manager
* @param pageManager
* the page manager in which to reload them, or {@code null} if none
* @param sashContainer
* the sash windows container in which to reload them, or {@code null} if none
*/
public LoadDiagramCommand(Resource resource, IPageManager pageManager, ISashWindowsContainer sashContainer) {
super();
this.pageManager = pageManager;
this.sashContainer = sashContainer;
this.uri = resource.getURI();
}
/**
* Reloads hte pages associated with my resource, if any and if there is a
* page manager.
*/
@Override
public void run() {
List<?> pagesToReload = getPagesToReload();
if (!pagesToReload.isEmpty()) {
pagesToReload.forEach(pageManager::reloadPage);
}
}
/**
* Queries whether I have any pages to reload. If I have none to reload,
* then I don't need to be executed.
*
* @return whether I have any pages to reload
* @since 1.3
*/
public boolean canExecute() {
List<?> pages = getPagesToReload();
return !pages.isEmpty() && pages.stream().allMatch(this::needsReload);
}
private List<?> getPagesToReload() {
List<?> result;
if (pageManager == null) {
result = Collections.EMPTY_LIST;
} else {
// Retrieve open pages related to our URI (in the abstract, without extension)
result = pageManager.getAssociatedPages(uri.trimFragment().trimFileExtension());
result.removeIf(Objects::isNull);
}
return result;
}
private boolean needsReload(Object pageIdentifier) {
boolean result = false;
if (sashContainer != null) {
IPage page = IPageUtils.lookupModelPage(sashContainer, pageIdentifier);
// If there is no page, it needn't be re-loaded
result = (page != null) && isUnloadedResourcePage(page);
}
return result;
}
private boolean isUnloadedResourcePage(IPage page) {
IPageModel model = PlatformHelper.getAdapter(page, IPageModel.class);
return (model != null) && (model instanceof UnloadResourcesEditorModel);
}
}
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