Mercurial > projects > dwt2
annotate org.eclipse.draw2d/src/org/eclipse/draw2d/graph/CompoundPopulateRanks.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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children | dbfb303e8fb0 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2003, 2005 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 * Port to the D programming language: |
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11 * Frank Benoit <benoit@tionex.de> |
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12 *******************************************************************************/ |
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13 module org.eclipse.draw2d.graph.CompoundPopulateRanks; |
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14 |
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15 import java.lang.all; |
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16 import org.eclipse.draw2d.graph.PopulateRanks; |
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17 import org.eclipse.draw2d.graph.DirectedGraph; |
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18 import org.eclipse.draw2d.graph.Subgraph; |
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19 import org.eclipse.draw2d.graph.CompoundDirectedGraph; |
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20 import org.eclipse.draw2d.graph.Edge; |
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21 import org.eclipse.draw2d.graph.NodeList; |
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22 import org.eclipse.draw2d.graph.Node; |
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23 |
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24 /** |
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25 * Places nodes into ranks for a compound directed graph. If a subgraph spans a rank |
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26 * without any nodes which belong to that rank, a bridge node is inserted to prevent nodes |
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27 * from violating the subgraph boundary. |
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28 * @author Randy Hudson |
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29 * @since 2.1.2 |
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30 */ |
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31 class CompoundPopulateRanks : PopulateRanks { |
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32 |
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33 public void visit(DirectedGraph g) { |
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34 CompoundDirectedGraph graph = cast(CompoundDirectedGraph)g; |
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35 |
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36 /** |
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37 * Remove long containment edges at this point so they don't affect MinCross. |
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38 */ |
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39 Iterator containment = graph.containment.iterator(); |
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40 while (containment.hasNext()) { |
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41 Edge e = cast(Edge)containment.next(); |
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42 if (e.getSlack() > 0) { |
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43 graph.removeEdge(e); |
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44 containment.remove(); |
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45 } |
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46 } |
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47 |
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48 super.visit(g); |
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49 NodeList subgraphs = graph.subgraphs; |
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50 for (int i = 0; i < subgraphs.size(); i++) { |
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51 Subgraph subgraph = cast(Subgraph)subgraphs.get(i); |
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52 bridgeSubgraph(subgraph, graph); |
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53 } |
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54 } |
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55 |
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56 /** |
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57 * @param subgraph |
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58 */ |
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59 private void bridgeSubgraph(Subgraph subgraph, CompoundDirectedGraph g) { |
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60 int offset = subgraph.head.rank; |
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61 bool occupied[] = new bool[subgraph.tail.rank - subgraph.head.rank + 1]; |
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62 Node bridge[] = new Node[occupied.length]; |
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63 |
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64 for (int i = 0; i < subgraph.members.size(); i++) { |
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65 Node n = cast(Node)subgraph.members.get(i); |
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66 if (auto s = cast(Subgraph)n ) { |
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67 for (int r = s.head.rank; r <= s.tail.rank; r++) |
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68 occupied[r - offset] = true; |
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69 } else |
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70 occupied[n.rank - offset] = true; |
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71 } |
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72 |
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73 for (int i = 0; i < bridge.length; i++) { |
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74 if (!occupied[i]) { |
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75 Node br = bridge[i] = new Node(stringcast("bridge"), subgraph); //$NON-NLS-1$ |
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76 br.rank = i + offset; |
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77 br.height = br.width = 0; |
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78 br.nestingIndex = subgraph.nestingIndex; |
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79 g.ranks.getRank(br.rank).add(br); |
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80 g.nodes.add(br); |
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81 } |
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82 } |
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83 } |
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84 |
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85 } |