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/*******************************************************************************
* Copyright (c) 2011 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:
* Juergen Haug (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.core.ui.util
import org.eclipse.emf.ecore.EObject
import org.eclipse.etrice.core.fsm.fSM.Guard
import org.eclipse.etrice.core.fsm.fSM.StateGraphItem
import org.eclipse.etrice.core.room.ActorClass
import org.eclipse.etrice.expressions.detailcode.DefaultDetailExpressionProvider
import org.eclipse.etrice.expressions.detailcode.DetailExpressionAssistParser
import org.eclipse.etrice.expressions.detailcode.GuardDetailExpressionProvider
import org.eclipse.etrice.expressions.detailcode.IDetailExpressionProvider
import org.eclipse.jface.text.Document
import org.eclipse.xtext.nodemodel.ILeafNode
import org.eclipse.etrice.expressions.detailcode.IDetailExpressionProvider.ExpressionFeature
import org.eclipse.etrice.core.room.Operation
import org.eclipse.etrice.core.room.ClassStructor
class UIExpressionUtil {
static def IDetailExpressionProvider selectExpressionProvider(EObject it) {
switch it {
Guard: new GuardDetailExpressionProvider(findActorClass)
StateGraphItem: new DefaultDetailExpressionProvider(findActorClass)
Operation: new DefaultDetailExpressionProvider(findActorClass)
ClassStructor: new GuardDetailExpressionProvider(findActorClass)
default: new IDetailExpressionProvider.EmptyDetailExpressionProvider
}
}
static def private ActorClass findActorClass(EObject model) {
var parent = model;
while (parent !== null) {
if (parent instanceof ActorClass) {
return parent as ActorClass
}
parent = parent.eContainer();
}
return null
}
static def ExpressionFeature findAtOffset(ILeafNode leafNode, int offset) {
// work in progress - show eObject for detail code
val exprProvider = UIExpressionUtil.selectExpressionProvider(leafNode.semanticElement.eContainer)
// TODO explicit support for hover info in DetailExpressionAssistParser
val text = leafNode.text
val completeExprOffset = {
var exprEndOfsset = offset - leafNode.offset
while(text.length > exprEndOfsset && Character.isJavaIdentifierPart(text.charAt(exprEndOfsset)))
exprEndOfsset += 1
exprEndOfsset
}
val parser = new DetailExpressionAssistParser(new Document(leafNode.text), completeExprOffset, exprProvider)
switch contextFeature : parser?.resolveLatestCompleted {
case null: exprProvider.initialFeatures.findFirst[id == parser.computeIdentifierPrefix(completeExprOffset)]
default: exprProvider.getContextFeatures(contextFeature).findFirst[id == parser.computeIdentifierPrefix(completeExprOffset)]
}
}
}
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