1 | package com.framsticks.gui.tree; |
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2 | |
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3 | import java.util.Enumeration; |
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4 | import java.util.Iterator; |
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5 | import java.util.LinkedList; |
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6 | import java.util.List; |
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7 | |
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8 | import javax.annotation.Nullable; |
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9 | import javax.swing.event.TreeModelEvent; |
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10 | import javax.swing.event.TreeModelListener; |
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11 | import javax.swing.tree.TreePath; |
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12 | |
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13 | import org.apache.logging.log4j.Logger; |
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14 | import org.apache.logging.log4j.LogManager; |
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15 | |
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16 | import com.framsticks.core.ListChange; |
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17 | import com.framsticks.core.Node; |
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18 | import com.framsticks.core.Path; |
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19 | import com.framsticks.core.SideNoteKey; |
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20 | import com.framsticks.core.TreeOperations; |
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21 | import com.framsticks.gui.Frame; |
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22 | import com.framsticks.params.Access; |
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23 | import com.framsticks.params.CompositeParam; |
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24 | import com.framsticks.params.EventListener; |
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25 | import com.framsticks.params.ListAccess; |
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26 | import com.framsticks.params.PrimitiveParam; |
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27 | import com.framsticks.params.ParamsUtil; |
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28 | import com.framsticks.params.ValueParam; |
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29 | import com.framsticks.params.types.EventParam; |
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30 | import com.framsticks.util.FramsticksException; |
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31 | import com.framsticks.util.Misc; |
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32 | import com.framsticks.util.FramsticksUnsupportedOperationException; |
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33 | import com.framsticks.util.dispatching.FutureHandler; |
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34 | import com.framsticks.util.lang.Casting; |
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35 | |
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36 | import static com.framsticks.core.TreeOperations.*; |
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37 | |
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38 | public class TreeModel implements javax.swing.tree.TreeModel { |
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39 | private static final Logger log = LogManager.getLogger(TreeModel.class); |
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40 | |
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41 | |
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42 | protected List<TreeModelListener> listeners = new LinkedList<>(); |
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43 | |
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44 | |
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45 | protected final Frame frame; |
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46 | |
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47 | /** |
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48 | * @param frame |
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49 | */ |
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50 | public TreeModel(Frame frame) { |
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51 | this.frame = frame; |
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52 | } |
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53 | |
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54 | @Override |
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55 | public void addTreeModelListener(TreeModelListener listener) { |
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56 | listeners.add(listener); |
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57 | } |
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58 | |
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59 | @Override |
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60 | public Object getChild(Object parent, int number) { |
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61 | return Casting.throwCast(AbstractNode.class, parent).getChild(number); |
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62 | } |
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63 | |
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64 | @Override |
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65 | public int getChildCount(Object parent) { |
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66 | return Casting.throwCast(AbstractNode.class, parent).getChildCount(); |
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67 | } |
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68 | |
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69 | @Override |
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70 | public int getIndexOfChild(Object parent, Object child) { |
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71 | if ((parent == null) || (child == null)) { |
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72 | return -1; |
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73 | } |
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74 | return Casting.throwCast(AbstractNode.class, parent).getIndexOfChild(child); |
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75 | } |
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76 | |
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77 | @Override |
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78 | public MetaNode getRoot() { |
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79 | return frame.getRootNode(); |
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80 | } |
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81 | |
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82 | @Override |
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83 | public boolean isLeaf(Object node) { |
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84 | return Casting.throwCast(AbstractNode.class, node).isLeaf(); |
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85 | } |
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86 | |
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87 | @Override |
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88 | public void removeTreeModelListener(TreeModelListener listener) { |
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89 | listeners.remove(listener); |
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90 | } |
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91 | |
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92 | @Override |
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93 | public void valueForPathChanged(TreePath path, Object value) { |
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94 | throw new FramsticksUnsupportedOperationException().msg("changing value of tree node"); |
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95 | } |
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96 | |
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97 | |
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98 | protected boolean changing = false; |
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99 | |
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100 | public void treeNodesInserted(TreeModelEvent event) { |
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101 | assert frame.isActive(); |
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102 | try { |
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103 | for (TreeModelListener listener : listeners) { |
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104 | listener.treeNodesInserted(event); |
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105 | } |
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106 | } catch (ArrayIndexOutOfBoundsException e) { |
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107 | } |
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108 | } |
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109 | |
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110 | public void treeNodesRemoved(TreeModelEvent event) { |
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111 | assert frame.isActive(); |
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112 | try { |
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113 | for (TreeModelListener listener : listeners) { |
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114 | listener.treeNodesRemoved(event); |
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115 | } |
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116 | } catch (ArrayIndexOutOfBoundsException e) { |
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117 | } |
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118 | } |
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119 | |
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120 | public void treeNodesChanged(TreeModelEvent event) { |
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121 | try { |
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122 | for (TreeModelListener listener : listeners) { |
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123 | listener.treeNodesChanged(event); |
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124 | } |
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125 | } catch (ArrayIndexOutOfBoundsException e) { |
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126 | } |
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127 | } |
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128 | |
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129 | public TreeModelEvent prepareModelEvent(TreePath treePath, int number, TreeNode node) { |
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130 | return new TreeModelEvent(this, treePath, new int[] {number}, new Object[] { node }); |
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131 | } |
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132 | |
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133 | |
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134 | public TreeModelEvent prepareModelEventRegarding(Access access, String id, TreePath treeListPath) { |
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135 | |
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136 | int number = ParamsUtil.getNumberOfCompositeParamChild(access, access.get(id, Object.class)); |
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137 | if (number == -1) { |
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138 | log.debug("encountered minor tree inconsistency in {}", treeListPath); |
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139 | return null; |
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140 | } |
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141 | TreeNode node = Casting.throwCast(TreeNode.class, Casting.throwCast(TreeNode.class, treeListPath.getLastPathComponent()).getChild(number)); |
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142 | return prepareModelEvent(treeListPath, number, node); |
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143 | } |
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144 | |
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145 | public void treeStructureChanged(TreePath treePath) { |
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146 | |
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147 | if (treePath == null) { |
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148 | return; |
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149 | } |
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150 | assert frame.isActive(); |
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151 | |
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152 | changing = true; |
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153 | log.debug("changing structure: {}", treePath); |
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154 | Enumeration<TreePath> expanded = frame.getJtree().getExpandedDescendants(treePath); |
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155 | TreePath selection = frame.getJtree().getSelectionPath(); |
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156 | |
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157 | try { |
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158 | for (TreeModelListener listener : listeners) { |
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159 | listener.treeStructureChanged(new TreeModelEvent(this, treePath)); |
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160 | } |
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161 | } catch (ArrayIndexOutOfBoundsException e) { |
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162 | } |
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163 | |
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164 | |
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165 | if (expanded != null) { |
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166 | while (expanded.hasMoreElements()) { |
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167 | TreePath expansion = expanded.nextElement(); |
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168 | // log.info("reexpanding: {}", expansion); |
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169 | frame.getJtree().expandPath(expansion); |
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170 | } |
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171 | } |
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172 | |
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173 | if (selection != null) { |
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174 | frame.getJtree().setSelectionPath(selection); |
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175 | } |
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176 | changing = false; |
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177 | } |
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178 | |
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179 | /** |
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180 | * |
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181 | * This method may return null on conversion failure, which may happen in highload situations. |
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182 | */ |
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183 | public @Nullable Path convertToPath(TreePath treePath) { |
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184 | final Object[] components = treePath.getPath(); |
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185 | assert components[0] == frame.getRootNode(); |
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186 | if (components.length == 1) { |
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187 | return null; |
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188 | } |
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189 | Path.PathBuilder builder = Path.build(); |
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190 | builder.tree(Casting.assertCast(TreeNode.class, components[1]).getTree()); |
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191 | List<Node> nodes = new LinkedList<>(); |
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192 | for (int i = 1; i < components.length; ++i) { |
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193 | TreeNode treeNode = Casting.tryCast(TreeNode.class, components[i]); |
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194 | if (treeNode == null) { |
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195 | return null; |
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196 | } |
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197 | Node node = treeNode.tryCreateNode(); |
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198 | if (node == null) { |
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199 | return null; |
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200 | // throw new FramsticksException().msg("failed to recreate path").arg("treePath", treePath); |
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201 | } |
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202 | nodes.add(node); |
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203 | } |
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204 | builder.buildUpTo(nodes, null); |
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205 | |
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206 | return builder.finish(); |
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207 | } |
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208 | |
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209 | public TreePath convertToTreePath(Path path, boolean forceComplete) { |
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210 | assert frame.isActive(); |
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211 | |
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212 | List<Object> accumulator = new LinkedList<Object>(); |
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213 | accumulator.add(getRoot()); |
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214 | |
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215 | for (Object r : getRoot().getChildren()) { |
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216 | if (r instanceof TreeNode) { |
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217 | TreeNode root = (TreeNode) r; |
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218 | if (root.getTree() == path.getTree()) { |
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219 | Iterator<Node> n = path.getNodes().iterator(); |
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220 | TreeNode treeNode = root; |
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221 | accumulator.add(root); |
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222 | n.next(); |
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223 | while (n.hasNext()) { |
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224 | Node node = n.next(); |
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225 | treeNode = treeNode.prepareTreeNodeForChild(Path.build().tree(path.getTree()).buildUpTo(path.getNodes(), node).finish()); |
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226 | if (treeNode == null) { |
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227 | break; |
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228 | } |
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229 | accumulator.add(treeNode); |
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230 | } |
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231 | break; |
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232 | } |
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233 | } |
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234 | } |
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235 | return new TreePath(accumulator.toArray()); |
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236 | } |
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237 | |
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238 | /** |
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239 | * @return the listeners |
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240 | */ |
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241 | public List<TreeModelListener> getListeners() { |
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242 | return listeners; |
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243 | } |
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244 | |
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245 | /** |
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246 | * @return the changing |
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247 | */ |
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248 | public boolean isChanging() { |
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249 | return changing; |
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250 | } |
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251 | |
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252 | public void loadChildren(Path path, boolean reload) { |
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253 | if (path == null) { |
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254 | return; |
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255 | } |
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256 | Access access = TreeOperations.bindAccess(path); |
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257 | |
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258 | int count = access.getCompositeParamCount(); |
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259 | for (int i = 0; i < count; ++i) { |
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260 | Path childPath = path.appendParam(access.getCompositeParam(i)).tryFindResolution(); |
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261 | loadPath(childPath, reload); |
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262 | } |
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263 | } |
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264 | |
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265 | public void loadPath(Path path, boolean reload) { |
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266 | if (path == null) { |
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267 | return; |
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268 | } |
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269 | if (!reload && path.isResolved() && isMarked(path.getTree(), path.getTopObject(), FETCHED_MARK, false)) { |
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270 | return; |
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271 | } |
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272 | path.getTree().get(path, new FutureHandler<Path>(frame) { |
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273 | @Override |
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274 | protected void result(Path result) { |
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275 | final TreePath treePath = convertToTreePath(result, true); |
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276 | |
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277 | |
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278 | if (treePath != null) { |
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279 | treeStructureChanged(treePath); |
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280 | frame.updatePanelIfIsLeadSelection(result); |
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281 | } |
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282 | } |
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283 | }); |
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284 | } |
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285 | |
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286 | public void expandTreeNode(TreePath treePath) { |
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287 | assert frame.isActive(); |
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288 | if (treePath == null) { |
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289 | return; |
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290 | } |
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291 | if (isChanging()) { |
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292 | return; |
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293 | } |
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294 | Path path = convertToPath(treePath); |
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295 | if (path == null) { |
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296 | return; |
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297 | } |
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298 | loadChildren(path.assureResolved(), false); |
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299 | } |
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300 | |
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301 | public void chooseTreeNode(final TreePath treePath) { |
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302 | assert frame.isActive(); |
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303 | if (treePath == null) { |
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304 | return; |
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305 | } |
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306 | if (isChanging()) { |
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307 | return; |
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308 | } |
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309 | |
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310 | Path path = convertToPath(treePath); |
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311 | if (path == null) { |
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312 | return; |
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313 | } |
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314 | path = path.assureResolved(); |
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315 | |
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316 | log.debug("choosing {}", path); |
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317 | frame.showPanelForTreePath(treePath); |
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318 | loadPath(path, false); |
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319 | |
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320 | } |
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321 | |
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322 | |
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323 | protected void registerForEventParam(final TreeNode treeNode, Path path, final EventParam eventParam, ValueParam valueParam) { |
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324 | /** TODO make this listener not bind hold the reference to this TreeNode, maybe hold WeakReference internally */ |
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325 | if (valueParam instanceof PrimitiveParam) { |
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326 | |
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327 | treeNode.tryAddListener(path, eventParam, Object.class, new EventListener<Object>() { |
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328 | @Override |
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329 | public void action(Object argument) { |
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330 | loadPath(treeNode.assurePath(), true); |
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331 | } |
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332 | }); |
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333 | |
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334 | } else if (valueParam instanceof CompositeParam) { |
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335 | |
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336 | final CompositeParam compositeParam = (CompositeParam) valueParam; |
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337 | |
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338 | treeNode.tryAddListener(path, eventParam, ListChange.class, new EventListener<ListChange>() { |
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339 | @Override |
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340 | public void action(ListChange listChange) { |
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341 | assert treeNode.getTree().isActive(); |
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342 | |
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343 | Path parentPath = treeNode.assurePath(); |
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344 | final Path listPath = parentPath.appendParam(compositeParam).tryFindResolution(); |
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345 | if (!listPath.isResolved()) { |
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346 | /** that situation is quietly ignored - it may happen if first event comes before the container was resolved */ |
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347 | return; |
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348 | } |
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349 | |
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350 | log.debug("reacting to change {} in {}", listChange, listPath); |
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351 | final TreePath treeListPath = convertToTreePath(listPath, true); |
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352 | if (treeListPath == null) { |
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353 | throw new FramsticksException().msg("path was not fully converted").arg("path", listPath); |
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354 | } |
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355 | |
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356 | if ((listChange.getAction().equals(ListChange.Action.Modify)) && (listChange.getPosition() == -1)) { |
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357 | // get(listPath, future); |
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358 | // treeModel.nodeStructureChanged(treePath); |
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359 | // frame.updatePanelIfIsLeadSelection(treePath, result); |
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360 | return; |
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361 | } |
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362 | final String id = listChange.getBestIdentifier(); |
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363 | |
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364 | final ListAccess access = (ListAccess) bindAccess(listPath); |
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365 | switch (listChange.getAction()) { |
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366 | case Add: { |
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367 | Path childPath = listPath.appendParam(access.prepareParamFor(id)).tryFindResolution(); |
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368 | if (!childPath.isResolved()) { |
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369 | childPath = create(childPath); |
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370 | |
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371 | TreeModelEvent event = prepareModelEventRegarding(access, id, treeListPath); |
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372 | if (event != null) { |
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373 | treeNodesInserted(event); |
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374 | } else { |
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375 | treeStructureChanged(treeListPath); |
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376 | } |
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377 | frame.updatePanelIfIsLeadSelection(listPath); |
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378 | } |
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379 | |
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380 | listPath.getTree().get(childPath, new FutureHandler<Path>(frame) { |
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381 | @Override |
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382 | protected void result(Path result) { |
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383 | if (!result.isResolved()) { |
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384 | log.warn("inconsistency after addition list change: {}", result); |
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385 | } |
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386 | assert frame.isActive(); |
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387 | final TreePath treePath = Misc.throwIfNull(frame.getTreeModel().convertToTreePath(result, true)); |
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388 | |
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389 | // treeModel.nodeStructureChanged(treePath); |
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390 | frame.updatePanelIfIsLeadSelection(result); |
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391 | |
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392 | log.debug("added {}({}) updated {}", id, result, treePath); |
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393 | } |
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394 | }); |
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395 | break; |
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396 | } |
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397 | case Remove: { |
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398 | |
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399 | TreeModelEvent event = prepareModelEventRegarding(access, id, treeListPath); |
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400 | access.set(id, null); |
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401 | if (event != null) { |
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402 | treeNodesRemoved(event); |
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403 | } else { |
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404 | treeStructureChanged(treeListPath); |
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405 | } |
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406 | |
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407 | frame.updatePanelIfIsLeadSelection(listPath); |
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408 | |
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409 | break; |
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410 | } |
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411 | case Modify: { |
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412 | Path childPath = listPath.appendParam(access.prepareParamFor(id)).tryResolveIfNeeded(); |
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413 | listPath.getTree().get(childPath, new FutureHandler<Path>(frame) { |
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414 | @Override |
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415 | protected void result(Path result) { |
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416 | assert frame.isActive(); |
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417 | // final TreePath treePath = frame.getTreeModel().convertToTreePath(result, true); |
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418 | |
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419 | TreeModelEvent event = prepareModelEventRegarding(access, id, treeListPath); |
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420 | if (event != null) { |
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421 | treeNodesChanged(event); |
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422 | } else { |
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423 | treeStructureChanged(treeListPath); |
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424 | } |
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425 | |
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426 | frame.updatePanelIfIsLeadSelection(listPath); |
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427 | frame.updatePanelIfIsLeadSelection(result); |
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428 | } |
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429 | }); |
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430 | break; |
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431 | } |
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432 | } |
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433 | } |
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434 | }); |
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435 | } |
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436 | |
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437 | } |
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438 | |
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439 | |
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440 | |
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441 | protected final SideNoteKey<Boolean> createdTag = SideNoteKey.make(Boolean.class); |
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442 | |
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443 | |
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444 | |
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445 | } |
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