1 | package de.ugoe.cs.quest.plugin.mfc.guimodel;
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2 |
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3 | import java.util.ArrayList;
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4 | import java.util.HashMap;
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5 | import java.util.HashSet;
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6 | import java.util.List;
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7 | import java.util.Map;
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8 | import java.util.Set;
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9 |
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10 | import de.ugoe.cs.quest.eventcore.guimodel.GUIElementFactory;
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11 | import de.ugoe.cs.quest.eventcore.guimodel.GUIModel;
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12 | import de.ugoe.cs.quest.eventcore.guimodel.GUIModelException;
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13 | import de.ugoe.cs.quest.eventcore.guimodel.IGUIElementFactory;
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14 |
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15 |
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16 | /**
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17 | * <p>
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18 | * This class provides an the interfaces for window trees.
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19 | * </p>
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20 | * <p>
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21 | * The window tree represents the hierarchical structure of the windows "as it is" currently during
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22 | * a session. It may change during the session due to creation and destruction of windows.
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23 | * </p>
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24 | *
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25 | * @author Steffen Herbold
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26 | * @version 1.0
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27 | */
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28 | public class WindowTree {
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29 |
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30 | /**
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31 | * <p>
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32 | * Maintains a set of all the targets of all widgets that were at some point part of the
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33 | * window tree.
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34 | * </p>
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35 | */
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36 | private Set<MFCGUIElementSpec> targets;
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37 |
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38 | /**
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39 | * <p>
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40 | * Map of all GUI element specifications that are part of the tree for efficient searching.
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41 | * The keys of the map are the hwnd's of the GUI elements.
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42 | * </p>
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43 | */
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44 | private Map<Long, MFCGUIElementSpec> guiElementSpecs;
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45 |
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46 | /**
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47 | * <p>
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48 | * Map of all children of GUI elements that are part of the tree. The keys of the map are
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49 | * the hwnd's of the parent GUI elements.
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50 | * </p>
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51 | */
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52 | private Map<Long, List<MFCGUIElementSpec>> childRelations;
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53 |
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54 | /**
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55 | * <p>
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56 | * Map of all parents of GUI elements that are part of the tree. The keys of the map are
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57 | * the hwnd's of the child GUI elements.
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58 | * </p>
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59 | */
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60 | private Map<Long, MFCGUIElementSpec> parentRelations;
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61 |
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62 | /**
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63 | * <p>
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64 | * the internally created GUI model
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65 | * </p>
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66 | */
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67 | private GUIModel guiModel = new GUIModel();
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68 |
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69 | /**
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70 | * <p>
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71 | * the GUI element factory used in the model
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72 | * </p>
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73 | */
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74 | private IGUIElementFactory guiElementFactory = GUIElementFactory.getInstance();
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75 |
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76 | /**
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77 | * <p>
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78 | * Map of all GUI elements that are part of the tree for efficient searching. The keys of the
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79 | * map are the hwnd's of the GUI elements.
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80 | * </p>
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81 | */
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82 | private Map<Long, MFCGUIElement> guiElements;
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83 |
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84 | /**
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85 | * <p>
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86 | * Creates a new WindowTree.
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87 | * </p>
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88 | * <p>
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89 | * Private, as the class is a singleton.
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90 | * </p>
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91 | */
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92 | public WindowTree() {
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93 | guiElementSpecs = new HashMap<Long, MFCGUIElementSpec>();
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94 | targets = new HashSet<MFCGUIElementSpec>();
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95 | childRelations = new HashMap<Long, List<MFCGUIElementSpec>>();
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96 | parentRelations = new HashMap<Long, MFCGUIElementSpec>();
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97 | guiElements = new HashMap<Long, MFCGUIElement>();
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98 | }
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99 |
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100 | /**
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101 | * <p>
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102 | * Adds a new window to the tree.
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103 | * </p>
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104 | *
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105 | * @param parentHwnd
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106 | * hwnd of the parent window
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107 | * @param childHwnd
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108 | * hwnd of the window to be created
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109 | * @param childWindowName
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110 | * resource id of the window to be created
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111 | * @param resourceId
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112 | * resource id of the window to be created
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113 | * @param className
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114 | * class name of the window to be created
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115 | */
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116 | public void add(long parentHwnd,
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117 | long childHwnd,
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118 | String childWindowName,
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119 | int resourceId,
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120 | String className,
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121 | boolean isModal)
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122 | {
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123 | MFCGUIElementSpec parent = guiElementSpecs.get(parentHwnd);
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124 | MFCGUIElementSpec child = guiElementSpecs.get(childHwnd);
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125 | if (child == null) {
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126 | child =
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127 | new MFCGUIElementSpec(childHwnd, childWindowName, resourceId, className, isModal);
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128 | if (parent != null) {
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129 | List<MFCGUIElementSpec> otherChildren = childRelations.get(parentHwnd);
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130 |
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131 | if (otherChildren == null) {
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132 | otherChildren = new ArrayList<MFCGUIElementSpec>();
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133 | childRelations.put(parentHwnd, otherChildren);
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134 | }
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135 |
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136 | otherChildren.add(child);
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137 |
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138 | parentRelations.put(childHwnd, parent);
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139 | }
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140 | guiElementSpecs.put(childHwnd, child);
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141 | targets.add(child);
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142 | }
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143 | }
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144 |
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145 | /**
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146 | * <p>
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147 | * Searches the tree for a window with the specified hwnd and returns its {@link MFCGUIElementSpec}
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148 | * .
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149 | * </p>
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150 | *
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151 | * @param hwnd
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152 | * hwnd that is looked for
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153 | * @return {@link MFCGUIElementSpec} of the window with the given hwnd if found, null otherwise
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154 | */
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155 | public MFCGUIElement find(long hwnd) {
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156 | MFCGUIElement guiElement = guiElements.get(hwnd);
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157 | if (guiElement == null) {
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158 | List<MFCGUIElementSpec> guiElementPath = new ArrayList<MFCGUIElementSpec>();
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159 |
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160 | MFCGUIElementSpec child = guiElementSpecs.get(hwnd);
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161 |
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162 | if (child == null) {
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163 | throw new RuntimeException("no GUI element found with id " + hwnd);
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164 | }
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165 |
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166 | while (child != null) {
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167 | guiElementPath.add(0, child);
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168 | child = parentRelations.get(child.getHwnd());
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169 | }
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170 |
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171 | try {
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172 | guiElement = (MFCGUIElement)
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173 | guiModel.integratePath(guiElementPath, guiElementFactory);
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174 | }
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175 | catch (GUIModelException e) {
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176 | throw new RuntimeException("could not instantiate GUI element with id " + hwnd, e);
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177 | }
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178 | guiElements.put(hwnd, guiElement);
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179 | }
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180 | return guiElement;
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181 | }
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182 |
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183 | /**
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184 | * <p>
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185 | * TODO: comment
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186 | * </p>
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187 | *
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188 | * @param hwnd
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189 | * @param windowName
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190 | */
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191 | public void setName(long hwnd, String windowName) {
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192 | MFCGUIElementSpec child = guiElementSpecs.get(hwnd);
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193 | if (child != null) {
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194 | child.setName(windowName);
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195 |
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196 | MFCGUIElement guiElement = guiElements.remove(hwnd);
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197 | if (guiElement == null) {
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198 | // we need to update the GUI model as well
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199 | find(hwnd);
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200 | }
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201 | }
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202 | }
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203 |
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204 | /**
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205 | * <p>
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206 | * Removes a window (defined by its hwnd) from the tree. All children of the window will be
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207 | * removed recursively.
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208 | * </p>
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209 | *
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210 | * @param hwnd
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211 | * hwnd of the window to be removed
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212 | * @return number of windows that were removed
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213 | */
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214 | public int remove(long hwnd) {
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215 | MFCGUIElementSpec node = guiElementSpecs.remove(hwnd);
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216 | int removedCounter = 1;
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217 |
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218 | if (node != null) {
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219 | List<MFCGUIElementSpec> nodesToBeRemoved = childRelations.remove(hwnd);
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220 |
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221 | // remove all children and sub-children, if any
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222 | if (nodesToBeRemoved != null) {
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223 | for (int i = 0; i < nodesToBeRemoved.size(); i++) {
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224 | MFCGUIElementSpec nodeToBeRemoved = nodesToBeRemoved.get(i);
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225 | List<MFCGUIElementSpec> children =
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226 | childRelations.remove(nodeToBeRemoved.getHwnd());
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227 |
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228 | if (children != null) {
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229 | nodesToBeRemoved.addAll(children);
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230 | }
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231 |
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232 | guiElementSpecs.remove(nodeToBeRemoved.getHwnd());
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233 | parentRelations.remove(nodeToBeRemoved.getHwnd());
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234 | removedCounter++;
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235 | }
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236 | }
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237 |
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238 | // the node may be a child node of a parent. So search for it and remove it
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239 | MFCGUIElementSpec parent = parentRelations.remove(hwnd);
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240 | if (parent != null) {
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241 | List<MFCGUIElementSpec> children = childRelations.get(parent.getHwnd());
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242 |
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243 | if (children != null) {
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244 | for (int i = 0; i < children.size(); i++) {
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245 | if (children.get(i).getHwnd() == hwnd) {
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246 | children.remove(i);
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247 | break;
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248 | }
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249 | }
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250 |
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251 | if (children.size() <= 0) {
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252 | childRelations.remove(parent.getHwnd());
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253 | }
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254 | }
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255 | }
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256 | }
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257 | return removedCounter;
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258 | }
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259 |
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260 | /**
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261 | * @return the guiModel
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262 | */
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263 | public GUIModel getGUIModel() {
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264 | return guiModel;
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265 | }
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266 |
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267 | /**
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268 | * <p>
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269 | * Returns the number of nodes contained in the WindowTree.
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270 | * </p>
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271 | *
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272 | * @return number of nodes
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273 | */
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274 | public int size() {
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275 | return guiElementSpecs.size();
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276 | }
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277 |
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278 | /**
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279 | * <p>
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280 | * Returns a sorted set of all targets that existed any time in the window tree.
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281 | * </p>
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282 | *
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283 | * @return set of targets
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284 | */
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285 | public Set<MFCGUIElementSpec> getTargets() {
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286 | return targets;
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287 | }
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288 |
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289 | }
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