1 files changed, 96 insertions, 0 deletions
diff --git a/plugins/org.eclipse.sirius.diagram/specific/org/eclipse/sirius/diagram/ui/tools/api/layout/provider/CompoundLayoutProvider.java b/plugins/org.eclipse.sirius.diagram/specific/org/eclipse/sirius/diagram/ui/tools/api/layout/provider/CompoundLayoutProvider.java
new file mode 100644
index 0000000000..74e08b3916
--- /dev/null
+++ b/plugins/org.eclipse.sirius.diagram/specific/org/eclipse/sirius/diagram/ui/tools/api/layout/provider/CompoundLayoutProvider.java
@@ -0,0 +1,96 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 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.diagram.ui.tools.api.layout.provider;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.eclipse.core.runtime.IAdaptable;
+import org.eclipse.gef.commands.Command;
+import org.eclipse.gef.commands.CompoundCommand;
+import org.eclipse.gmf.runtime.common.core.service.IOperation;
+import org.eclipse.gmf.runtime.diagram.ui.services.layout.AbstractLayoutEditPartProvider;
+
+/**
+ * A compound layout provider.
+ * 
+ * @author ymortier
+ */
+public class CompoundLayoutProvider extends AbstractLayoutProvider {
+
+    /** the list of delegated providers. */
+    private final List<AbstractLayoutEditPartProvider> delegatedProviders = new LinkedList<AbstractLayoutEditPartProvider>();
+
+    /** The list of providers that provides for the next operation. */
+    private final List<AbstractLayoutEditPartProvider> realDelegatedProviders = new LinkedList<AbstractLayoutEditPartProvider>();
+
+    /**
+     * Adds a provider.
+     * 
+     * @param provider
+     *            the provider to add.
+     */
+    public void addProvider(final AbstractLayoutEditPartProvider provider) {
+        this.delegatedProviders.add(provider);
+        this.realDelegatedProviders.add(provider);
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.gmf.runtime.diagram.ui.services.layout.AbstractLayoutEditPartProvider#layoutEditParts(java.util.List,
+     *      org.eclipse.core.runtime.IAdaptable)
+     */
+    @Override
+    public Command layoutEditParts(final List selectedObjects, final IAdaptable layoutHint) {
+        final CompoundCommand cc = new CompoundCommand();
+        final ArrayList<AbstractLayoutEditPartProvider> inverse = new ArrayList<AbstractLayoutEditPartProvider>(this.realDelegatedProviders);
+        final Iterator<AbstractLayoutEditPartProvider> iterRealDelegatedProviders = inverse.listIterator();
+        while (iterRealDelegatedProviders.hasNext()) {
+            final AbstractLayoutEditPartProvider provider = iterRealDelegatedProviders.next();
+            if (provider instanceof AbstractLayoutProvider) {
+                ((AbstractLayoutProvider) provider).setViewsToChangeBoundsRequest(this.getViewsToChangeBoundsRequest());
+            }
+            final Command command = provider.layoutEditParts(new ArrayList(selectedObjects), layoutHint);
+            if (command != null && command.canExecute()) {
+                cc.add(command);
+            }
+            if (provider instanceof AbstractLayoutProvider) {
+                this.getViewsToChangeBoundsRequest().putAll(((AbstractLayoutProvider) provider).getViewsToChangeBoundsRequest());
+            }
+        }
+        this.getViewsToChangeBoundsRequest().clear();
+        return cc;
+    }
+
+    /**
+     * {@inheritDoc}
+     * 
+     * @see org.eclipse.sirius.diagram.business.api.layout.provider.AbstractLayoutProvider#provides(org.eclipse.gmf.runtime.common.core.service.IOperation)
+     */
+    @Override
+    public boolean provides(final IOperation operation) {
+        boolean result = false;
+        this.realDelegatedProviders.clear();
+        final Iterator<AbstractLayoutEditPartProvider> iterDelegatedProviders = this.delegatedProviders.listIterator();
+        while (iterDelegatedProviders.hasNext()) {
+            final AbstractLayoutEditPartProvider currentProvider = iterDelegatedProviders.next();
+            if (currentProvider.provides(operation)) {
+                result = true;
+                this.realDelegatedProviders.add(currentProvider);
+            }
+        }
+        return result;
+    }
+
+}