Coverage report

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com.bonevich.eclipse.cvsgrapher.editors.CvsGraphLayout
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 1  
 /* ====================================================================
 2  
  * The Apache Software License, Version 1.1
 3  
  *
 4  
  * Copyright (c) 2000 The Apache Software Foundation.  All rights
 5  
  * reserved.
 6  
  *
 7  
  * Redistribution and use in source and binary forms, with or without
 8  
  * modification, are permitted provided that the following conditions
 9  
  * are met:
 10  
  *
 11  
  * 1. Redistributions of source code must retain the above copyright
 12  
  *    notice, this list of conditions and the following disclaimer.
 13  
  *
 14  
  * 2. Redistributions in binary form must reproduce the above copyright
 15  
  *    notice, this list of conditions and the following disclaimer in
 16  
  *    the documentation and/or other materials provided with the
 17  
  *    distribution.
 18  
  *
 19  
  * 3. The end-user documentation included with the redistribution,
 20  
  *    if any, must include the following acknowledgment:
 21  
  *       "This product includes software developed by the
 22  
  *        Apache Software Foundation (http://www.apache.org/)."
 23  
  *    Alternately, this acknowledgment may appear in the software itself,
 24  
  *    if and wherever such third-party acknowledgments normally appear.
 25  
  *
 26  
  * 4. The names "Apache" and "Apache Software Foundation" must
 27  
  *    not be used to endorse or promote products derived from this
 28  
  *    software without prior written permission. For written
 29  
  *    permission, please contact apache@apache.org.
 30  
  *
 31  
  * 5. Products derived from this software may not be called "Apache",
 32  
  *    nor may "Apache" appear in their name, without prior written
 33  
  *    permission of the Apache Software Foundation.
 34  
  *
 35  
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 36  
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 37  
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 38  
  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 39  
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 40  
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 41  
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 42  
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 43  
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 44  
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 45  
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 46  
  * SUCH DAMAGE.
 47  
  * ====================================================================
 48  
  *
 49  
  * This software consists of voluntary contributions made by many
 50  
  * individuals on behalf of the Apache Software Foundation.  For more
 51  
  * information on the Apache Software Foundation, please see
 52  
  * <http://www.apache.org/>.
 53  
  *
 54  
  * Portions of this software are based upon public domain software
 55  
  * originally written at the National Center for Supercomputing Applications,
 56  
  * University of Illinois, Urbana-Champaign.
 57  
  */
 58  
 package com.bonevich.eclipse.cvsgrapher.editors;
 59  
 
 60  
 import com.bonevich.eclipse.cvsgrapher.model.*;
 61  
 
 62  
 import org.eclipse.draw2d.FreeformLayout;
 63  
 import org.eclipse.draw2d.IFigure;
 64  
 import org.eclipse.draw2d.geometry.Dimension;
 65  
 import org.eclipse.draw2d.geometry.Point;
 66  
 import org.eclipse.gef.GraphicalEditPart;
 67  
 
 68  
 import java.util.Iterator;
 69  
 
 70  
 /**
 71  
  * The layout manager for the CVS Graph Editor.  Basically it is a <code>FreeformLayout</code>
 72  
  * but with an initializing routine to layout the tree.  Also allows the layout to
 73  
  * be reset ("snap" back to original layout).
 74  
  * 
 75  
  * @author jbonevic
 76  
  */
 77  
 public final class CvsGraphLayout extends FreeformLayout
 78  
 {
 79  
 	private final CvsGraphModel _model;
 80  
 	private final CvsGraphEditPart _editPart;
 81  
 	
 82  
 	private static final int BEGIN_X = 10;
 83  
 	private static final int BEGIN_Y = 10;
 84  
 	private static final int OFFSET_X = 40;
 85  
 	private static final int OFFSET_Y = 40;
 86  
 	
 87  0
 	private volatile boolean _initialized = false;
 88  
 
 89  
 	public CvsGraphLayout(CvsGraphEditPart editPart)
 90  0
 	{
 91  0
 		_editPart = editPart;
 92  0
 		_model = (CvsGraphModel) editPart.getModel();
 93  0
 	}
 94  
 
 95  
 	/**
 96  
 	 * Rules for layout of CVS graph:
 97  
 	 * <ul>
 98  
 	 *   <li>Rule 1: Root node must be branch node ("MAIN")</li>
 99  
 	 *   <li>Rule 2: Any node may have at most one child version node</li>
 100  
 	 *   <li>Rule 3: Any version node may have any number of child nodes (i.e. one version, n branches)</li>
 101  
 	 * </ul>
 102  
 	 */
 103  
 	private void initializeLayout()
 104  
 	{
 105  
 		// Rule 1
 106  0
 		CvsGraphBranchModel root = _model.getRootBranch();
 107  0
 		traverseTree(root, BEGIN_X, BEGIN_Y);
 108  
 
 109  0
 		setInitialized(true);
 110  0
 	}
 111  
 	
 112  
 	private int traverseTree(ICvsGraphNodeModel entry, class="keyword">int x, class="keyword">int y)
 113  
 	{
 114  0
 		ICvsGraphNodeEditPart part = (ICvsGraphNodeEditPart) getEditPartForModel(entry);
 115  0
 		CvsGraphNodeViewHelper view = part.getViewHelper();
 116  0
 		Point entryLocation = new Point(x, y);
 117  0
 		view.setLocation(entryLocation);
 118  
 		
 119  0
 		Dimension size = part.getFigure().getPreferredSize(-1,-1);
 120  0
 		int width = size.width;
 121  0
 		int height = size. height;
 122  0
 		int nextY = y + height + OFFSET_Y;
 123  
 		
 124  0
 		int nextX = x;
 125  0
 		int childNodesWidth = 0;
 126  
 		
 127  
 		// Rule 2 and 3
 128  0
 		Iterator children = entry.getChildNodes().iterator();
 129  0
 		while (children.hasNext())
 130  
 		{
 131  0
 			ICvsGraphNodeModel child = (ICvsGraphNodeModel) children.next();
 132  0
 			childNodesWidth += traverseTree(child, nextX, nextY);
 133  0
 			if (children.hasNext())
 134  
 			{
 135  0
 				childNodesWidth += OFFSET_X;
 136  0
 				nextX = x + childNodesWidth;
 137  
 			}
 138  
 		}
 139  
 
 140  0
 		int subTreeWidth = Math.max(childNodesWidth, width);
 141  0
 		int shiftX = (subTreeWidth - width) / 2;
 142  0
 		Point adjustedLocation = entryLocation.translate(shiftX, 0);
 143  0
 		view.setLocation(adjustedLocation);
 144  
 			
 145  0
 		return subTreeWidth;
 146  
 	}
 147  
 	
 148  
 	private GraphicalEditPart getEditPartForModel(ICvsGraphNodeModel model)
 149  
 	{
 150  0
 		return (GraphicalEditPart) _editPart.getRoot().getViewer().getEditPartRegistry().get(model);
 151  
 	}
 152  
 
 153  
 	/**
 154  
 	 * @see org.eclipse.draw2d.LayoutManager#layout(org.eclipse.draw2d.IFigure)
 155  
 	 */
 156  
 	public void layout(IFigure parent)
 157  
 	{
 158  0
 		super.layout(parent);
 159  0
 		if (!isInitialized())
 160  
 		{
 161  0
 			initializeLayout();
 162  
 		}
 163  0
 	}
 164  
 	
 165  
 	public void reset()
 166  
 	{
 167  0
 		initializeLayout();
 168  0
 	}
 169  
 
 170  
 	private synchronized boolean isInitialized()
 171  
 	{
 172  0
 		return _initialized;
 173  
 	}
 174  
 
 175  
 	private synchronized void setInitialized(boolean initialized)
 176  
 	{
 177  0
 		_initialized = initialized;
 178  0
 	}
 179  
 
 180  
 }

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