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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/graph/CompoundRankSorter.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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children dbfb303e8fb0
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12
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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.CompoundRankSorter;
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14
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15 import java.lang.all;
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16 import org.eclipse.draw2d.graph.RankSorter;
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17 import org.eclipse.draw2d.graph.Subgraph;
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18 import org.eclipse.draw2d.graph.Node;
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19 import org.eclipse.draw2d.graph.DirectedGraph;
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20 import org.eclipse.draw2d.graph.Rank;
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21 import org.eclipse.draw2d.graph.NestingTree;
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22 import org.eclipse.draw2d.graph.CompoundDirectedGraph;
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23 import org.eclipse.draw2d.graph.Edge;
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24 import org.eclipse.draw2d.graph.LocalOptimizer;
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25
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26 /**
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27 * Sorts nodes in a compound directed graph.
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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 CompoundRankSorter : RankSorter {
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32
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33 static class RowEntry {
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34 double contribution;
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35 int count;
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36 void reset() {
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37 count = 0;
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38 contribution = 0;
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39 }
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40 }
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41
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42 static class RowKey {
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43 int rank;
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44 Subgraph s;
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45 this() { }
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46 this(Subgraph s, int rank) {
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47 this.s = s;
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48 this.rank = rank;
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49 }
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50
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51 public override int opEquals(Object obj) {
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52 RowKey rp = cast(RowKey)obj;
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53 return rp.s is s && rp.rank is rank;
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54 }
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55
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56 public override hash_t toHash() {
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57 return s.toHash() ^ (rank * 31);
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58 }
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59 }
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60
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61 bool init_;
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62 RowKey key;
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63
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64 Map map;
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65
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66 public this(){
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67 key = new RowKey();
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68 map = new HashMap();
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69 }
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70
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71 void addRowEntry(Subgraph s, int row) {
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72 key.s = s;
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73 key.rank = row;
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74 if (!map.containsKey(key))
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75 map.put(new RowKey(s, row), new RowEntry());
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76 }
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77
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78 protected void assignIncomingSortValues() {
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79 super.assignIncomingSortValues();
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80 pullTogetherSubgraphs();
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81 }
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82
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83 protected void assignOutgoingSortValues() {
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84 super.assignOutgoingSortValues();
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85 pullTogetherSubgraphs();
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86 }
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87
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88 void optimize(DirectedGraph g) {
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89 CompoundDirectedGraph graph = cast(CompoundDirectedGraph)g;
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90 Iterator containment = graph.containment.iterator();
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91 while (containment.hasNext())
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92 graph.removeEdge(cast(Edge)containment.next());
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93 graph.containment.clear();
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94 (new LocalOptimizer())
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95 .visit(graph);
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96 }
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97
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98 private void pullTogetherSubgraphs() {
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99 if (true)
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100 return;
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101 for (int j = 0; j < rank.count(); j++) {
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102 Node n = rank.getNode(j);
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103 Subgraph s = n.getParent();
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104 while (s !is null) {
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105 getRowEntry(s, currentRow).reset();
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106 s = s.getParent();
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107 }
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108 }
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109 for (int j = 0; j < rank.count(); j++) {
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110 Node n = rank.getNode(j);
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111 Subgraph s = n.getParent();
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112 while (s !is null) {
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113 RowEntry entry = getRowEntry(s, currentRow);
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114 entry.count++;
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115 entry.contribution += n.sortValue;
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116 s = s.getParent();
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117 }
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118 }
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119
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120 double weight = 0.5;// * (1.0 - progress) * 3;
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121
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122 for (int j = 0; j < rank.count(); j++) {
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123 Node n = rank.getNode(j);
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124 Subgraph s = n.getParent();
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125 if (s !is null) {
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126 RowEntry entry = getRowEntry(s, currentRow);
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127 n.sortValue =
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128 n.sortValue * (1.0 - weight) + weight * entry.contribution / entry.count;
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129 }
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130 }
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131 }
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132
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133 double evaluateNodeOutgoing() {
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134 double result = super.evaluateNodeOutgoing();
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135 // result += Math.random() * rankSize * (1.0 - progress) / 3.0;
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136 if (progress > 0.2) {
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137 Subgraph s = node.getParent();
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138 double connectivity = mergeConnectivity(s, node.rank + 1, result, progress);
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139 result = connectivity;
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140 }
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141 return result;
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142 }
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143
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144 double evaluateNodeIncoming() {
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145 double result = super.evaluateNodeIncoming();
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146 // result += Math.random() * rankSize * (1.0 - progress) / 3.0;
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147 if (progress > 0.2) {
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148 Subgraph s = node.getParent();
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149 double connectivity = mergeConnectivity(s, node.rank - 1, result, progress);
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150 result = connectivity;
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151 }
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152 return result;
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153 }
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154
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155 double mergeConnectivity(Subgraph s, int row, double result, double scaleFactor) {
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156 while (s !is null && getRowEntry(s, row) is null)
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157 s = s.getParent();
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158 if (s !is null) {
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159 RowEntry entry = getRowEntry(s, row);
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160 double connectivity = entry.contribution / entry.count;
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161 result = connectivity * 0.3 + (0.7) * result;
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162 s = s.getParent();
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163 }
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164 return result;
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165 }
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166
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167 RowEntry getRowEntry(Subgraph s, int row) {
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168 key.s = s;
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169 key.rank = row;
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170 return cast(RowEntry)map.get(key);
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171 }
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172
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173 void copyConstraints(NestingTree tree) {
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174 if (tree.subgraph !is null)
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175 tree.sortValue = tree.subgraph.rowOrder;
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176 for (int i = 0; i < tree.contents.size(); i++) {
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177 Object child = tree.contents.get(i);
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178 if (auto n = cast(Node)child ) {
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179 n.sortValue = n.rowOrder;
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180 } else {
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181 copyConstraints(cast(NestingTree)child);
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182 }
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183 }
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184 }
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185
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186 public void init(DirectedGraph g) {
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187 super.init(g);
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188 init_ = true;
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189
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190 for (int row = 0; row < g.ranks.size(); row++) {
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191 Rank rank = g.ranks.getRank(row);
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192
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193 NestingTree tree = NestingTree.buildNestingTreeForRank(rank);
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194 copyConstraints(tree);
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195 tree.recursiveSort(true);
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196 rank.clear();
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197 tree.repopulateRank(rank);
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198
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199 for (int j = 0; j < rank.count(); j++) {
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200 Node n = rank.getNode(j);
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201 Subgraph s = n.getParent();
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202 while (s !is null) {
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203 addRowEntry(s, row);
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204 s = s.getParent();
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205 }
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206 }
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207 }
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208 }
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209
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210 protected void postSort() {
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211 super.postSort();
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212 if (init_)
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213 updateRank(rank);
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214 }
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215
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216 void updateRank(Rank rank) {
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217 for (int j = 0; j < rank.count(); j++) {
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218 Node n = rank.getNode(j);
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219 Subgraph s = n.getParent();
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220 while (s !is null) {
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221 getRowEntry(s, currentRow).reset();
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222 s = s.getParent();
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223 }
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224 }
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225 for (int j = 0; j < rank.count(); j++) {
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226 Node n = rank.getNode(j);
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227 Subgraph s = n.getParent();
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228 while (s !is null) {
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229 RowEntry entry = getRowEntry(s, currentRow);
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230 entry.count++;
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231 entry.contribution += n.index;
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232 s = s.getParent();
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233 }
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234 }
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235 }
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236
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237 }