/*******************************************************************************
* Copyright (c) 2009 Oracle Corporation.
* 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:
* Ian Trimble - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.dtresourceprovider;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.resources.IProject;
import org.eclipse.jst.pagedesigner.utils.StructuredModelUtil;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
/**
* Manages IDTSkin instances and provides skin-related services.
*
* @author Ian Trimble - Oracle
*/
public class DTSkinManager {
private static Map<IProject, DTSkinManager> dtSkinManagerMap =
new HashMap<IProject, DTSkinManager>();
private Map<String, IDTSkin> currentDTSkinMap;
private IProject project;
/**
* Constructs an instance (no public instantiation).
*
* @param project IProject instance for which this instance applies.
*/
private DTSkinManager(IProject project) {
this.project = project;
currentDTSkinMap = new HashMap<String, IDTSkin>();
}
/**
* Gets a DTSkinManager instance for the specified project instance.
*
* @param aProject IProject instance for which a DTSkinManager is being
* requested.
* @return A DTSkinManager instance for the specified project instance.
*/
public static synchronized DTSkinManager getInstance(IProject aProject) {
DTSkinManager dtSkinManager = dtSkinManagerMap.get(aProject);
if (dtSkinManager == null) {
dtSkinManager = new DTSkinManager(aProject);
dtSkinManagerMap.put(aProject, dtSkinManager);
}
return dtSkinManager;
}
/**
* Gets a DTSkinManager instance for the IProject instance associated with
* the specified IDOMNode instance.
*
* @param domNode IDOMNode instance for which a DTSkinManager is being
* requested.
* @return A DTSkinManager instance for the IProject instance associated
* with the specified IDOMNode instance.
*/
public static DTSkinManager getInstance(IDOMNode domNode) {
IDOMModel domModel = domNode.getModel();
IProject aProject = null;
if (domModel != null) {
aProject = StructuredModelUtil.getProjectFor(domModel);
}
return getInstance(aProject);
}
/**
* Returns a List of available IDTSkin instances.
*
* @param id ID for which to get skins.
* @return A List of available IDTSkin instances. List may be empty, but
* will not be null.
*/
public List<IDTSkin> getSkins(String id) {
List<IDTSkin> dtSkins = new ArrayList<IDTSkin>();
List<IDTResourceProvider> dtResourceProviders =
DTResourceProviderFactory.getInstance().getActiveDTResourceProviders(project);
for (IDTResourceProvider dtResourceProvider: dtResourceProviders) {
if (dtResourceProvider.getId().equals(id)) {
dtSkins.addAll(dtResourceProvider.getSkins());
}
}
return dtSkins;
}
/**
* Returns the current IDTSkin instance for the specified ID.
*
* @param id The ID (typically nsURI) for which the current IDTSkin instance
* is being requested.
* @return The current IDTSkin instance for the specified ID. May return
* null if there is no current IDTSkin instance for the specified ID.
*/
public IDTSkin getCurrentSkin(String id) {
IDTSkin dtSkin = currentDTSkinMap.get(id);
if (dtSkin == null) {
dtSkin = getDefaultSkin(id);
setCurrentSkin(id, dtSkin);
}
return dtSkin;
}
/**
* Sets the current IDTSkin instance for the specified ID.
*
* @param id The ID (typically nsURI) for which the current IDTSkin instance
* is being set.
* @param dtSkin The current IDTSkin instance to be set for the specified ID.
*/
public void setCurrentSkin(String id, IDTSkin dtSkin) {
if (id != null) {
IDTSkin existingDTSkin = currentDTSkinMap.get(id);
if (existingDTSkin != null) {
existingDTSkin.releaseResources();
}
if (dtSkin != null) {
currentDTSkinMap.put(id, dtSkin);
} else {
currentDTSkinMap.remove(id);
}
}
}
/**
* Returns a List of all current DTSkin instances (one per id).
*
* @return A List of all current DTSkin instances (one per id).
*/
public List<IDTSkin> getCurrentSkins() {
List<IDTSkin> currentDTSkins = new ArrayList<IDTSkin>();
List <IDTResourceProvider> dtResourceProviders =
DTResourceProviderFactory.getInstance().getActiveDTResourceProviders(project);
for (IDTResourceProvider dtResourceProvider: dtResourceProviders) {
IDTSkin dtSkin = getCurrentSkin(dtResourceProvider.getId());
if (dtSkin != null && !currentDTSkins.contains(dtSkin)) {
currentDTSkins.add(dtSkin);
}
}
return Collections.unmodifiableList(currentDTSkins);
}
/**
* Returns the default IDTSkin instance for the specified ID.
*
* @param id The ID (typically nsURI) for which the default IDTSkin instance
* is being requested.
* @return The default IDTSkin instance for the specified ID. May return
* null if there is no default IDTSkin instance for the specified ID.
*/
public IDTSkin getDefaultSkin(String id) {
IDTSkin firstDTSkin = null;
IDTSkin defaultDTSkin = null;
for (IDTSkin dtSkin: getSkins(id)) {
if (firstDTSkin == null) {
firstDTSkin = dtSkin;
}
if (dtSkin.isDefault()) {
defaultDTSkin = dtSkin;
break;
}
}
if (defaultDTSkin == null) {
defaultDTSkin = firstDTSkin;
}
return defaultDTSkin;
}
}