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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 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* CONTRIBUTORS:
* Juergen Haug (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.core.ui.hover
import com.google.inject.Inject
import org.eclipse.etrice.core.common.ui.hover.KeywordEObjectTextHover
import org.eclipse.etrice.core.fsm.fSM.DetailCode
import org.eclipse.etrice.core.services.RoomGrammarAccess
import org.eclipse.etrice.dctools.ast.DCUtil
import org.eclipse.jface.text.Region
import org.eclipse.xtext.RuleCall
import org.eclipse.xtext.nodemodel.util.NodeModelUtils
import org.eclipse.xtext.resource.XtextResource
import org.eclipse.xtext.util.Tuples
class RoomHoverProvider extends KeywordEObjectTextHover {
@Inject RoomGrammarAccess grammar
@Inject DCUtil util
override protected getXtextElementAt(XtextResource resource, int offset) {
// lookup expression
val parseResult = resource.parseResult
if(parseResult !== null) {
val leafNode = NodeModelUtils.findLeafNodeAtOffset(parseResult.rootNode, offset)
if(leafNode?.grammarElement instanceof RuleCall) {
if((leafNode.grammarElement as RuleCall).rule == grammar.CC_STRINGRule && leafNode.semanticElement instanceof DetailCode){
// println("RoomHoverProvider at offset " + offset + " " + leafNode.offset + " " + leafNode.text.substring(offset - leafNode.offset))
val result = util.findAtOffset(leafNode, offset)
if (result!==null) {
// val begin = result.begin
// println("RoomHoverProvider hit " + (leafNode.offset + result.begin) +" " + result.length + " " + leafNode.text.substring(begin, begin + result.length))
return Tuples.create(result.object, new Region(leafNode.offset + result.begin, result.length))
}
}
}
}
super.getXtextElementAt(resource, offset)
}
}
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