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