/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.ui.javaeditor.selectionactions;
import org.eclipse.ui.PlatformUI;
import org.eclipse.jdt.core.ISourceRange;
import org.eclipse.jdt.core.ISourceReference;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.internal.corext.dom.GenericVisitor;
import org.eclipse.jdt.internal.corext.dom.SelectionAnalyzer;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
public class StructureSelectNextAction extends StructureSelectionAction{
private static class NextNodeAnalyzer extends GenericVisitor {
private final int fOffset;
private ASTNode fNextNode;
private NextNodeAnalyzer(int offset) {
super(true);
fOffset= offset;
}
public static ASTNode perform(int offset, ASTNode lastCoveringNode) {
NextNodeAnalyzer analyzer= new NextNodeAnalyzer(offset);
lastCoveringNode.accept(analyzer);
return analyzer.fNextNode;
}
@Override
protected boolean visitNode(ASTNode node) {
int start= node.getStartPosition();
int end= start + node.getLength();
if (start == fOffset) {
fNextNode= node;
return true;
} else {
return (start < fOffset && fOffset < end);
}
}
}
public StructureSelectNextAction(JavaEditor editor, SelectionHistory history) {
super(SelectionActionMessages.StructureSelectNext_label, editor, history);
setToolTipText(SelectionActionMessages.StructureSelectNext_tooltip);
setDescription(SelectionActionMessages.StructureSelectNext_description);
PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.STRUCTURED_SELECT_NEXT_ACTION);
}
/*
* This constructor is for testing purpose only.
*/
public StructureSelectNextAction() {
}
/* non java doc
* @see StructureSelectionAction#internalGetNewSelectionRange(ISourceRange, ICompilationUnit, SelectionAnalyzer)
*/
@Override
ISourceRange internalGetNewSelectionRange(ISourceRange oldSourceRange, ISourceReference sr, SelectionAnalyzer selAnalyzer) throws JavaModelException{
if (oldSourceRange.getLength() == 0 && selAnalyzer.getLastCoveringNode() != null) {
ASTNode previousNode= NextNodeAnalyzer.perform(oldSourceRange.getOffset(), selAnalyzer.getLastCoveringNode());
if (previousNode != null)
return getSelectedNodeSourceRange(sr, previousNode);
}
ASTNode first= selAnalyzer.getFirstSelectedNode();
if (first == null)
return getLastCoveringNodeRange(oldSourceRange, sr, selAnalyzer);
ASTNode parent= first.getParent();
if (parent == null)
return getLastCoveringNodeRange(oldSourceRange, sr, selAnalyzer);
ASTNode lastSelectedNode= selAnalyzer.getSelectedNodes()[selAnalyzer.getSelectedNodes().length - 1];
ASTNode nextNode= getNextNode(parent, lastSelectedNode);
if (nextNode == parent)
return getSelectedNodeSourceRange(sr, first.getParent());
int offset= oldSourceRange.getOffset();
int end= Math.min(sr.getSourceRange().getLength(), nextNode.getStartPosition() + nextNode.getLength() - 1);
return StructureSelectionAction.createSourceRange(offset, end);
}
private static ASTNode getNextNode(ASTNode parent, ASTNode node){
ASTNode[] siblingNodes= StructureSelectionAction.getSiblingNodes(node);
if (siblingNodes == null || siblingNodes.length == 0)
return parent;
if (node == siblingNodes[siblingNodes.length -1 ])
return parent;
else
return siblingNodes[StructureSelectionAction.findIndex(siblingNodes, node) + 1];
}
}