1 files changed, 110 insertions, 0 deletions
diff --git a/plugins/org.eclipse.etrice.core.room.ui/src/org/eclipse/etrice/core/ui/contentassist/RoomProposalProvider.java b/plugins/org.eclipse.etrice.core.room.ui/src/org/eclipse/etrice/core/ui/contentassist/RoomProposalProvider.java
new file mode 100644
index 000000000..1982c4b69
--- /dev/null
+++ b/plugins/org.eclipse.etrice.core.room.ui/src/org/eclipse/etrice/core/ui/contentassist/RoomProposalProvider.java
@@ -0,0 +1,110 @@
+/*******************************************************************************
+ * Copyright (c) 2010 protos software gmbh (http://www.protos.de).
+ * 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:
+ * 		Thomas Schuetz and Henrik Rentz-Reichert (initial contribution)
+ * 
+ *******************************************************************************/
+
+package org.eclipse.etrice.core.ui.contentassist;
+
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.etrice.core.ui.contentassist.AbstractRoomProposalProvider;
+import org.eclipse.etrice.core.validation.ValidationUtil;
+import org.eclipse.jface.text.contentassist.ICompletionProposal;
+import org.eclipse.jface.viewers.StyledString;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.xtext.resource.IEObjectDescription;
+import org.eclipse.xtext.ui.editor.contentassist.ContentAssistContext;
+
+import com.google.common.base.Function;
+
+import org.eclipse.etrice.core.room.ActorClass;
+import org.eclipse.etrice.core.room.ActorRef;
+import org.eclipse.etrice.core.room.RoomPackage;
+/**
+ * see http://www.eclipse.org/Xtext/documentation/latest/xtext.html#contentAssist on how to customize content assistant
+ */
+public class RoomProposalProvider extends AbstractRoomProposalProvider {
+	
+	protected class FilteredProposalCreator implements Function<IEObjectDescription, ICompletionProposal> {
+		private IProposalFilter filter;
+		private final ContentAssistContext contentAssistContext;
+		private final String ruleName;
+
+		protected FilteredProposalCreator(IProposalFilter filter, ContentAssistContext contentAssistContext, String ruleName) {
+			this.filter = filter;
+			this.contentAssistContext = contentAssistContext;
+			this.ruleName = ruleName;
+		}
+
+		public ICompletionProposal apply(IEObjectDescription candidate) {
+			if (candidate == null)
+				return null;
+			ICompletionProposal result = null;
+			String proposal = candidate.getName();
+			if (ruleName != null)
+				proposal = getValueConverter().toString(proposal, ruleName);
+			EObject objectOrProxy = candidate.getEObjectOrProxy();
+			
+			// three new lines in code taken from org.eclipse.xtext.ui.editor.contentassist.AbstractJavaBasedContentProposalProvider.DefaultProposalCreator
+			if (!objectOrProxy.eIsProxy() && filter!=null)
+				if (!filter.accept(contentAssistContext, candidate))
+					return null;
+			
+			StyledString displayString = getStyledDisplayString(objectOrProxy, candidate.getQualifiedName(), candidate.getName());
+			Image image = getImage(objectOrProxy);
+			result = createCompletionProposal(proposal, displayString, image, contentAssistContext);
+			getPriorityHelper().adjustCrossReferencePriority(result, contentAssistContext.getPrefix());			
+			return result;
+		}
+
+	}
+	
+	protected class ActorRefFilter implements IProposalFilter {
+
+		@Override
+		public boolean accept(ContentAssistContext context, IEObjectDescription candidate) {
+			if (!(context.getCurrentModel() instanceof ActorRef))
+				// unexpected call??
+				return false;
+			
+			ActorRef ar = (ActorRef) context.getCurrentModel();
+			if (!(ar.eContainer() instanceof ActorClass))
+				// can not filter due to lack of information
+				return true;
+			
+			ActorClass ac = (ActorClass) ar.eContainer();
+			
+			EObject objectOrProxy = candidate.getEObjectOrProxy();
+			
+			if (objectOrProxy instanceof ActorClass) {
+				ActorClass referenced = (ActorClass) objectOrProxy;
+				return !ValidationUtil.isReferencing(referenced, ac);
+			}
+			
+			return false;
+		}
+		
+	}
+	
+	protected Function<IEObjectDescription, ICompletionProposal> getProposalFactory(String ruleName, ContentAssistContext contentAssistContext) {
+		if (contentAssistContext!=null && contentAssistContext.getCurrentModel().eClass()==RoomPackage.eINSTANCE.getActorRef())
+			return new FilteredProposalCreator(new ActorRefFilter(), contentAssistContext, ruleName);
+		
+		// delegate to default
+		return super.getProposalFactory(ruleName, contentAssistContext);
+	}
+
+//	public void completeActorRef_Type(EObject model, Assignment assignment, ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
+//		super.completeActorRef_Type(
+//			    model, 
+//			    assignment, 
+//			    context, 
+//			    acceptor);
+//	}
+}