1 files changed, 131 insertions, 0 deletions
diff --git a/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/views/ViewHelperImpl.java b/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/views/ViewHelperImpl.java
new file mode 100644
index 0000000000..65567cc032
--- /dev/null
+++ b/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/views/ViewHelperImpl.java
@@ -0,0 +1,131 @@
+/*******************************************************************************
+ * Copyright (c) 2008, 2010, 2011 THALES GLOBAL SERVICES.
+ * 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:
+ *    Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.sirius.ui.tools.internal.views;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.eclipse.emf.common.notify.AdapterFactory;
+import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
+import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
+import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
+import org.eclipse.jface.viewers.ILabelProvider;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+
+import com.google.common.base.Function;
+import com.google.common.collect.Collections2;
+import com.google.common.collect.Lists;
+
+import org.eclipse.sirius.ui.business.api.dialect.DialectUIManager;
+import org.eclipse.sirius.ui.business.api.featureExtensions.FeatureExtensionsUIManager;
+import org.eclipse.sirius.ui.tools.api.views.ViewHelper;
+import org.eclipse.sirius.ui.tools.internal.views.common.SessionWrapperContentProvider;
+import org.eclipse.sirius.ui.tools.internal.views.sessionview.extension.IContextMenuActionProvider;
+import org.eclipse.sirius.ui.tools.internal.views.sessionview.extension.ISessionViewExtension;
+
+/**
+ * An helper to provide facilities to view which extends viewpoint.
+ * 
+ * @author mchauvin
+ */
+public final class ViewHelperImpl implements ViewHelper {
+
+    private ILabelProvider labelProvider;
+
+    private ITreeContentProvider contentProvider;
+
+    private Collection<ISessionViewExtension> extensions = Lists.newArrayList();
+
+    /**
+     * Avoid instantiation.
+     */
+    private ViewHelperImpl() {
+
+    }
+
+    /**
+     * Create the shared instance.
+     * 
+     * @return the singleton
+     */
+    public static ViewHelper init() {
+        return new ViewHelperImpl();
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.sirius.ui.tools.api.views.ViewHelper#createAdapterFactory()
+     */
+    public AdapterFactory createAdapterFactory() {
+        final List<AdapterFactory> factories = new ArrayList<AdapterFactory>();
+        final ComposedAdapterFactory generic = new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE);
+        factories.add(DialectUIManager.INSTANCE.createAdapterFactory());
+        factories.add(FeatureExtensionsUIManager.INSTANCE.createAdapterFactory());
+        factories.add(generic);
+        factories.add(new ReflectiveItemProviderAdapterFactory());
+        return new ComposedAdapterFactory(factories);
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.sirius.ui.tools.api.views.ViewHelper#getContentProvider()
+     */
+    public ITreeContentProvider getContentProvider() {
+        if (contentProvider == null) {
+            contentProvider = new SessionWrapperContentProvider(new AdapterFactoryContentProvider(createAdapterFactory()));
+            Collection<ITreeContentProvider> liveProviders = Collections2.transform(extensions, new Function<ISessionViewExtension, ITreeContentProvider>() {
+                public ITreeContentProvider apply(ISessionViewExtension from) {
+                    return from.getContentProvider();
+                }
+            });
+            ((SessionWrapperContentProvider) contentProvider).setExtensions(liveProviders);
+        }
+        return contentProvider;
+    }
+
+    /**
+     * Get the context menu providers from extensions.
+     * 
+     * @return the providers
+     */
+    public Collection<IContextMenuActionProvider> getContextMenuActionsProviders() {
+        Collection<IContextMenuActionProvider> liveProviders = Collections2.transform(extensions, new Function<ISessionViewExtension, IContextMenuActionProvider>() {
+            public IContextMenuActionProvider apply(ISessionViewExtension from) {
+                return from.getContextMenuActionProvider();
+            }
+        });
+        return liveProviders;
+    }
+
+    /**
+     * Add an extension. This is not API.
+     * 
+     * @param extension
+     *            the extension to add
+     */
+    public void addExtension(ISessionViewExtension extension) {
+        extensions.add(extension);
+    }
+
+    /**
+     * Remove an extension. This is not API.
+     * 
+     * @param extension
+     *            the extension to remove
+     */
+    public void removeExtension(ISessionViewExtension extension) {
+        extensions.remove(extension);
+    }
+
+}