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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/graph/CompoundHorizontalPlacement.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, 2007 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.CompoundHorizontalPlacement;
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14
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15 import java.lang.all;
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16 import org.eclipse.draw2d.graph.HorizontalPlacement;
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17 import org.eclipse.draw2d.graph.Node;
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18 import org.eclipse.draw2d.graph.RankList;
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19 import org.eclipse.draw2d.graph.Rank;
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20 import org.eclipse.draw2d.graph.Subgraph;
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21 import org.eclipse.draw2d.graph.SubgraphBoundary;
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22 import org.eclipse.draw2d.graph.DirectedGraph;
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23 import org.eclipse.draw2d.graph.NodeList;
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24 import org.eclipse.draw2d.graph.CompoundDirectedGraph;
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25 import org.eclipse.draw2d.graph.Edge;
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26 import org.eclipse.draw2d.graph.GraphUtilities;
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27
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28 /**
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29 * Calculates the X-coordinates for nodes in a compound directed graph.
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30 * @author Randy Hudson
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31 * @since 2.1.2
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32 */
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33 class CompoundHorizontalPlacement : HorizontalPlacement {
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34
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35 class LeftRight {
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36 //$TODO Delete and use NodePair class, equivalent
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37 Object left, right;
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38 this(Object l, Object r) {
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39 left = l; right = r;
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40 }
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41 public override int opEquals(Object obj) {
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42 LeftRight entry = cast(LeftRight)obj;
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43 return entry.left.opEquals(left) && entry.right.opEquals(right);
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44 }
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45 public override hash_t toHash() {
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46 return left.toHash() ^ right.toHash();
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47 }
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48 }
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49
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50 Set entries;
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51
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52 public this(){
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53 entries = new HashSet();
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54 }
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55
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56 /**
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57 * @see org.eclipse.graph.HorizontalPlacement#applyGPrime()
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58 */
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59 void applyGPrime() {
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60 super.applyGPrime();
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61 NodeList subgraphs = (cast(CompoundDirectedGraph)graph).subgraphs;
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62 for (int i = 0; i < subgraphs.size(); i++) {
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63 Subgraph s = cast(Subgraph)subgraphs.get(i);
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64 s.x = s.left.x;
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65 s.width = s.right.x + s.right.width - s.x;
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66 }
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67 }
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68
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69 /**
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70 * @see HorizontalPlacement#buildRankSeparators(RankList)
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71 */
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72 void buildRankSeparators(RankList ranks) {
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73 CompoundDirectedGraph g = cast(CompoundDirectedGraph)graph;
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74
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75 Rank rank;
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76 for (int row = 0; row < g.ranks.size(); row++) {
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77 rank = g.ranks.getRank(row);
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78 Node n = null, prev = null;
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79 for (int j = 0; j < rank.size(); j++) {
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80 n = rank.getNode(j);
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81 if (prev is null) {
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82 Node left = addSeparatorsLeft(n, null);
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83 if (left !is null) {
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84 Edge e = new Edge(graphLeft, getPrime(left), 0, 0);
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85 prime.edges.add(e);
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86 e.delta = graph.getPadding(n).left + graph.getMargin().left;
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87 }
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88
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89 } else {
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90 Subgraph s = GraphUtilities.getCommonAncestor(prev, n);
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91 Node left = addSeparatorsRight(prev, s);
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92 Node right = addSeparatorsLeft(n, s);
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93 createEdge(left, right);
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94 }
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95 prev = n;
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96 }
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97 if (n !is null)
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98 addSeparatorsRight(n, null);
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99 }
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100 }
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101
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102 void createEdge(Node left, Node right) {
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103 LeftRight entry = new LeftRight(left, right);
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104 if (entries.contains(entry))
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105 return;
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106 entries.add(entry);
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107 int separation = left.width
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108 + graph.getPadding(left).right
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109 + graph.getPadding(right).left;
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110 prime.edges.add(new Edge(
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111 getPrime(left), getPrime(right), separation, 0
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112 ));
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113 }
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114
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115 Node addSeparatorsLeft(Node n, Subgraph graph) {
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116 Subgraph parent = n.getParent();
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117 while (parent !is graph && parent !is null) {
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118 createEdge(getLeft(parent), n);
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119 n = parent.left;
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120 parent = parent.getParent();
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121 }
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122 return n;
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123 }
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124
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125 Node addSeparatorsRight(Node n, Subgraph graph) {
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126 Subgraph parent = n.getParent();
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127 while (parent !is graph && parent !is null) {
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128 createEdge(n, getRight(parent));
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129 n = parent.right;
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130 parent = parent.getParent();
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131 }
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132 return n;
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133 }
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134
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135 Node getLeft(Subgraph s) {
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136 if (s.left is null) {
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137 s.left = new SubgraphBoundary(s, graph.getPadding(s), 1);
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138 s.left.rank = (s.head.rank + s.tail.rank) / 2;
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139
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140 Node head = getPrime(s.head);
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141 Node tail = getPrime(s.tail);
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142 Node left = getPrime(s.left);
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143 Node right = getPrime(getRight(s));
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144 prime.edges.add(new Edge(left, right, s.width, 0));
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145 prime.edges.add(new Edge(left, head, 0, 1));
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146 prime.edges.add(new Edge(head, right, 0, 1));
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147 prime.edges.add(new Edge(left, tail, 0, 1));
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148 prime.edges.add(new Edge(tail, right, 0, 1));
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149 }
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150 return s.left;
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151 }
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152
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153 Node getRight(Subgraph s) {
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154 if (s.right is null) {
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155 s.right = new SubgraphBoundary(s, graph.getPadding(s), 3);
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156 s.right.rank = (s.head.rank + s.tail.rank) / 2;
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157 }
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158 return s.right;
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159 }
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160
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161 Node getPrime(Node n) {
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162 Node nPrime = get(n);
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163 if (nPrime is null) {
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164 nPrime = new Node(n);
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165 prime.nodes.add(nPrime);
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166 map(n, nPrime);
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167 }
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168 return nPrime;
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169 }
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170
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171 public void visit(DirectedGraph g) {
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172 super.visit(g);
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173 }
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174
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175 }