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1 /* |
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2 * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 package sun.awt.dnd; |
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27 |
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28 import java.awt.Component; |
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29 import java.awt.Point; |
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30 |
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31 import java.awt.datatransfer.DataFlavor; |
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32 import java.awt.datatransfer.Transferable; |
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33 import java.awt.datatransfer.UnsupportedFlavorException; |
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34 |
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35 import java.awt.dnd.DnDConstants; |
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36 |
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37 import java.awt.dnd.DropTarget; |
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38 import java.awt.dnd.DropTargetContext; |
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39 import java.awt.dnd.DropTargetListener; |
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40 import java.awt.dnd.DropTargetEvent; |
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41 import java.awt.dnd.DropTargetDragEvent; |
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42 import java.awt.dnd.DropTargetDropEvent; |
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43 import java.awt.dnd.InvalidDnDOperationException; |
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44 |
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45 import java.awt.dnd.peer.DropTargetContextPeer; |
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46 |
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47 import java.util.HashSet; |
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48 import java.util.Map; |
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49 import java.util.Arrays; |
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50 |
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51 import java.util.logging.*; |
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52 |
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53 import java.io.IOException; |
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54 import java.io.InputStream; |
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55 |
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56 import sun.awt.AppContext; |
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57 import sun.awt.SunToolkit; |
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58 import sun.awt.datatransfer.DataTransferer; |
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59 import sun.awt.datatransfer.ToolkitThreadBlockedHandler; |
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60 |
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61 /** |
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62 * <p> |
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63 * The SunDropTargetContextPeer class is the generic class responsible for handling |
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64 * the interaction between a windowing systems DnD system and Java. |
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65 * </p> |
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66 * |
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67 * @since JDK1.3.1 |
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68 * |
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69 */ |
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70 |
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71 public abstract class SunDropTargetContextPeer implements DropTargetContextPeer, Transferable { |
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72 |
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73 /* |
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74 * A boolean constant that requires the peer to wait until the |
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75 * SunDropTargetEvent is processed and return the status back |
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76 * to the native code. |
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77 */ |
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78 public static final boolean DISPATCH_SYNC = true; |
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79 private DropTarget currentDT; |
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80 private DropTargetContext currentDTC; |
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81 private long[] currentT; |
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82 private int currentA; // target actions |
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83 private int currentSA; // source actions |
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84 private int currentDA; // current drop action |
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85 private int previousDA; |
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86 |
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87 private long nativeDragContext; |
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88 |
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89 private Transferable local; |
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90 |
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91 private boolean dragRejected = false; |
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92 |
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93 protected int dropStatus = STATUS_NONE; |
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94 protected boolean dropComplete = false; |
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95 |
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96 /* |
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97 * global lock |
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98 */ |
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99 |
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100 protected static final Object _globalLock = new Object(); |
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101 |
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102 private static final Logger dndLog = Logger.getLogger("sun.awt.dnd.SunDropTargetContextPeer"); |
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103 |
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104 /* |
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105 * a primitive mechanism for advertising intra-JVM Transferables |
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106 */ |
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107 |
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108 protected static Transferable currentJVMLocalSourceTransferable = null; |
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109 |
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110 public static void setCurrentJVMLocalSourceTransferable(Transferable t) throws InvalidDnDOperationException { |
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111 synchronized(_globalLock) { |
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112 if (t != null && currentJVMLocalSourceTransferable != null) { |
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113 throw new InvalidDnDOperationException(); |
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114 } else { |
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115 currentJVMLocalSourceTransferable = t; |
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116 } |
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117 } |
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118 } |
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119 |
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120 /** |
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121 * obtain the transferable iff the operation is in the same VM |
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122 */ |
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123 |
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124 private static Transferable getJVMLocalSourceTransferable() { |
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125 return currentJVMLocalSourceTransferable; |
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126 } |
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127 |
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128 /* |
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129 * constants used by dropAccept() or dropReject() |
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130 */ |
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131 |
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132 protected final static int STATUS_NONE = 0; // none pending |
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133 protected final static int STATUS_WAIT = 1; // drop pending |
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134 protected final static int STATUS_ACCEPT = 2; |
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135 protected final static int STATUS_REJECT = -1; |
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136 |
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137 /** |
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138 * create the peer |
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139 */ |
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140 |
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141 public SunDropTargetContextPeer() { |
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142 super(); |
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143 } |
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144 |
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145 /** |
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146 * @return the DropTarget associated with this peer |
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147 */ |
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148 |
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149 public DropTarget getDropTarget() { return currentDT; } |
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150 |
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151 /** |
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152 * @param actions set the current actions |
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153 */ |
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154 |
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155 public synchronized void setTargetActions(int actions) { |
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156 currentA = actions & |
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157 (DnDConstants.ACTION_COPY_OR_MOVE | DnDConstants.ACTION_LINK); |
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158 } |
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159 |
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160 /** |
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161 * @return the current target actions |
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162 */ |
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163 |
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164 public int getTargetActions() { |
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165 return currentA; |
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166 } |
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167 |
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168 /** |
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169 * get the Transferable associated with the drop |
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170 */ |
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171 |
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172 public Transferable getTransferable() { |
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173 return this; |
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174 } |
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175 |
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176 /** |
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177 * @return current DataFlavors available |
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178 */ |
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179 // NOTE: This method may be called by privileged threads. |
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180 // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
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181 |
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182 public DataFlavor[] getTransferDataFlavors() { |
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183 final Transferable localTransferable = local; |
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184 |
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185 if (localTransferable != null) { |
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186 return localTransferable.getTransferDataFlavors(); |
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187 } else { |
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188 return DataTransferer.getInstance().getFlavorsForFormatsAsArray |
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189 (currentT, DataTransferer.adaptFlavorMap |
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190 (currentDT.getFlavorMap())); |
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191 } |
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192 } |
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193 |
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194 /** |
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195 * @return if the flavor is supported |
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196 */ |
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197 |
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198 public boolean isDataFlavorSupported(DataFlavor df) { |
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199 Transferable localTransferable = local; |
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200 |
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201 if (localTransferable != null) { |
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202 return localTransferable.isDataFlavorSupported(df); |
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203 } else { |
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204 return DataTransferer.getInstance().getFlavorsForFormats |
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205 (currentT, DataTransferer.adaptFlavorMap |
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206 (currentDT.getFlavorMap())). |
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207 containsKey(df); |
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208 } |
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209 } |
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210 |
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211 /** |
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212 * @return the data |
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213 */ |
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214 |
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215 public Object getTransferData(DataFlavor df) |
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216 throws UnsupportedFlavorException, IOException, |
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217 InvalidDnDOperationException |
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218 { |
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219 Long lFormat = null; |
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220 Transferable localTransferable = local; |
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221 |
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222 if (localTransferable != null) { |
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223 return localTransferable.getTransferData(df); |
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224 } |
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225 |
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226 if (dropStatus != STATUS_ACCEPT || dropComplete) { |
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227 throw new InvalidDnDOperationException("No drop current"); |
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228 } |
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229 |
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230 Map flavorMap = DataTransferer.getInstance().getFlavorsForFormats |
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231 (currentT, DataTransferer.adaptFlavorMap |
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232 (currentDT.getFlavorMap())); |
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233 |
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234 lFormat = (Long)flavorMap.get(df); |
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235 if (lFormat == null) { |
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236 throw new UnsupportedFlavorException(df); |
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237 } |
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238 |
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239 if (df.isRepresentationClassRemote() && |
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240 currentDA != DnDConstants.ACTION_LINK) { |
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241 throw new InvalidDnDOperationException("only ACTION_LINK is permissable for transfer of java.rmi.Remote objects"); |
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242 } |
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243 |
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244 final long format = lFormat.longValue(); |
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245 Object ret = getNativeData(format); |
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246 |
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247 if (ret instanceof byte[]) { |
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248 try { |
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249 return DataTransferer.getInstance(). |
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250 translateBytes((byte[])ret, df, format, this); |
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251 } catch (IOException e) { |
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252 throw new InvalidDnDOperationException(e.getMessage()); |
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253 } |
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254 } else if (ret instanceof InputStream) { |
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255 try { |
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256 return DataTransferer.getInstance(). |
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257 translateStream((InputStream)ret, df, format, this); |
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258 } catch (IOException e) { |
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259 throw new InvalidDnDOperationException(e.getMessage()); |
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260 } |
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261 } else { |
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262 throw new IOException("no native data was transfered"); |
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263 } |
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264 } |
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265 |
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266 protected abstract Object getNativeData(long format) |
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267 throws IOException; |
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268 |
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269 /** |
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270 * @return if the transfer is a local one |
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271 */ |
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272 public boolean isTransferableJVMLocal() { |
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273 return local != null || getJVMLocalSourceTransferable() != null; |
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274 } |
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275 |
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276 private int handleEnterMessage(final Component component, |
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277 final int x, final int y, |
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278 final int dropAction, |
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279 final int actions, final long[] formats, |
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280 final long nativeCtxt) { |
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281 return postDropTargetEvent(component, x, y, dropAction, actions, |
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282 formats, nativeCtxt, |
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283 SunDropTargetEvent.MOUSE_ENTERED, |
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284 SunDropTargetContextPeer.DISPATCH_SYNC); |
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285 } |
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286 |
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287 /** |
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288 * actual processing on EventQueue Thread |
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289 */ |
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290 |
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291 protected void processEnterMessage(SunDropTargetEvent event) { |
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292 Component c = (Component)event.getSource(); |
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293 DropTarget dt = c.getDropTarget(); |
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294 Point hots = event.getPoint(); |
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295 |
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296 local = getJVMLocalSourceTransferable(); |
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297 |
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298 if (currentDTC != null) { // some wreckage from last time |
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299 currentDTC.removeNotify(); |
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300 currentDTC = null; |
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301 } |
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302 |
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303 if (c.isShowing() && dt != null && dt.isActive()) { |
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304 currentDT = dt; |
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305 currentDTC = currentDT.getDropTargetContext(); |
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306 |
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307 currentDTC.addNotify(this); |
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308 |
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309 currentA = dt.getDefaultActions(); |
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310 |
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311 try { |
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312 ((DropTargetListener)dt).dragEnter(new DropTargetDragEvent(currentDTC, |
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313 hots, |
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314 currentDA, |
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315 currentSA)); |
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316 } catch (Exception e) { |
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317 e.printStackTrace(); |
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318 currentDA = DnDConstants.ACTION_NONE; |
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319 } |
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320 } else { |
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321 currentDT = null; |
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322 currentDTC = null; |
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323 currentDA = DnDConstants.ACTION_NONE; |
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324 currentSA = DnDConstants.ACTION_NONE; |
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325 currentA = DnDConstants.ACTION_NONE; |
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326 } |
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327 |
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328 } |
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329 |
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330 /** |
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331 * upcall to handle exit messages |
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332 */ |
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333 |
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334 private void handleExitMessage(final Component component, |
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335 final long nativeCtxt) { |
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336 /* |
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337 * Even though the return value is irrelevant for this event, it is |
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338 * dispatched synchronously to fix 4393148 properly. |
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339 */ |
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340 postDropTargetEvent(component, 0, 0, DnDConstants.ACTION_NONE, |
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341 DnDConstants.ACTION_NONE, null, nativeCtxt, |
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342 SunDropTargetEvent.MOUSE_EXITED, |
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343 SunDropTargetContextPeer.DISPATCH_SYNC); |
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344 } |
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345 |
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346 /** |
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347 * |
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348 */ |
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349 |
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350 protected void processExitMessage(SunDropTargetEvent event) { |
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351 Component c = (Component)event.getSource(); |
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352 DropTarget dt = c.getDropTarget(); |
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353 DropTargetContext dtc = null; |
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354 |
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355 if (dt == null) { |
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356 currentDT = null; |
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357 currentT = null; |
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358 |
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359 if (currentDTC != null) { |
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360 currentDTC.removeNotify(); |
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361 } |
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362 |
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363 currentDTC = null; |
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364 |
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365 return; |
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366 } |
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367 |
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368 if (dt != currentDT) { |
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369 |
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370 if (currentDTC != null) { |
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371 currentDTC.removeNotify(); |
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372 } |
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373 |
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374 currentDT = dt; |
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375 currentDTC = dt.getDropTargetContext(); |
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376 |
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377 currentDTC.addNotify(this); |
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378 } |
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379 |
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380 dtc = currentDTC; |
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381 |
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382 if (dt.isActive()) try { |
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383 ((DropTargetListener)dt).dragExit(new DropTargetEvent(dtc)); |
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384 } catch (Exception e) { |
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385 e.printStackTrace(); |
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386 } finally { |
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387 currentA = DnDConstants.ACTION_NONE; |
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388 currentSA = DnDConstants.ACTION_NONE; |
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389 currentDA = DnDConstants.ACTION_NONE; |
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390 currentDT = null; |
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391 currentT = null; |
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392 |
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393 currentDTC.removeNotify(); |
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394 currentDTC = null; |
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395 |
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396 local = null; |
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397 |
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398 dragRejected = false; |
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399 } |
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400 } |
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401 |
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402 private int handleMotionMessage(final Component component, |
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403 final int x, final int y, |
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404 final int dropAction, |
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405 final int actions, final long[] formats, |
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406 final long nativeCtxt) { |
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407 return postDropTargetEvent(component, x, y, dropAction, actions, |
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408 formats, nativeCtxt, |
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409 SunDropTargetEvent.MOUSE_DRAGGED, |
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410 SunDropTargetContextPeer.DISPATCH_SYNC); |
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411 } |
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412 |
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413 /** |
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414 * |
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415 */ |
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416 |
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417 protected void processMotionMessage(SunDropTargetEvent event, |
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418 boolean operationChanged) { |
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419 Component c = (Component)event.getSource(); |
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420 Point hots = event.getPoint(); |
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421 int id = event.getID(); |
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422 DropTarget dt = c.getDropTarget(); |
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423 DropTargetContext dtc = null; |
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424 |
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425 if (c.isShowing() && (dt != null) && dt.isActive()) { |
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426 if (currentDT != dt) { |
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427 if (currentDTC != null) { |
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428 currentDTC.removeNotify(); |
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429 } |
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430 |
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431 currentDT = dt; |
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432 currentDTC = null; |
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433 } |
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434 |
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435 dtc = currentDT.getDropTargetContext(); |
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436 if (dtc != currentDTC) { |
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437 if (currentDTC != null) { |
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438 currentDTC.removeNotify(); |
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439 } |
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440 |
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441 currentDTC = dtc; |
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442 currentDTC.addNotify(this); |
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443 } |
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444 |
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445 currentA = currentDT.getDefaultActions(); |
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446 |
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447 try { |
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448 DropTargetDragEvent dtde = new DropTargetDragEvent(dtc, |
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449 hots, |
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450 currentDA, |
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451 currentSA); |
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452 DropTargetListener dtl = (DropTargetListener)dt; |
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453 if (operationChanged) { |
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454 dtl.dropActionChanged(dtde); |
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455 } else { |
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456 dtl.dragOver(dtde); |
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457 } |
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458 |
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459 if (dragRejected) { |
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460 currentDA = DnDConstants.ACTION_NONE; |
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461 } |
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462 } catch (Exception e) { |
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463 e.printStackTrace(); |
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464 currentDA = DnDConstants.ACTION_NONE; |
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465 } |
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466 } else { |
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467 currentDA = DnDConstants.ACTION_NONE; |
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468 } |
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469 } |
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470 |
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471 /** |
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472 * upcall to handle the Drop message |
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473 */ |
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474 |
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475 private void handleDropMessage(final Component component, |
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476 final int x, final int y, |
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477 final int dropAction, final int actions, |
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478 final long[] formats, |
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479 final long nativeCtxt) { |
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480 postDropTargetEvent(component, x, y, dropAction, actions, |
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481 formats, nativeCtxt, |
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482 SunDropTargetEvent.MOUSE_DROPPED, |
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483 !SunDropTargetContextPeer.DISPATCH_SYNC); |
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484 } |
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485 |
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486 /** |
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487 * |
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488 */ |
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489 |
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490 protected void processDropMessage(SunDropTargetEvent event) { |
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491 Component c = (Component)event.getSource(); |
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492 Point hots = event.getPoint(); |
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493 DropTarget dt = c.getDropTarget(); |
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494 |
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495 dropStatus = STATUS_WAIT; // drop pending ACK |
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496 dropComplete = false; |
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497 |
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498 if (c.isShowing() && dt != null && dt.isActive()) { |
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499 DropTargetContext dtc = dt.getDropTargetContext(); |
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500 |
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501 currentDT = dt; |
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502 |
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503 if (currentDTC != null) { |
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504 currentDTC.removeNotify(); |
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505 } |
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506 |
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507 currentDTC = dtc; |
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508 currentDTC.addNotify(this); |
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509 currentA = dt.getDefaultActions(); |
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510 |
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511 synchronized(_globalLock) { |
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512 if ((local = getJVMLocalSourceTransferable()) != null) |
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513 setCurrentJVMLocalSourceTransferable(null); |
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514 } |
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515 |
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516 try { |
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517 ((DropTargetListener)dt).drop(new DropTargetDropEvent(dtc, |
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518 hots, |
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519 currentDA, |
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520 currentSA, |
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521 local != null)); |
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522 } finally { |
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523 if (dropStatus == STATUS_WAIT) { |
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524 rejectDrop(); |
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525 } else if (dropComplete == false) { |
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526 dropComplete(false); |
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527 } |
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528 } |
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529 } else { |
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530 rejectDrop(); |
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531 } |
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532 } |
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533 |
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534 protected int postDropTargetEvent(final Component component, |
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535 final int x, final int y, |
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536 final int dropAction, |
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537 final int actions, |
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538 final long[] formats, |
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539 final long nativeCtxt, |
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540 final int eventID, |
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541 final boolean dispatchType) { |
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542 AppContext appContext = SunToolkit.targetToAppContext(component); |
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543 |
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544 EventDispatcher dispatcher = |
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545 new EventDispatcher(this, dropAction, actions, formats, nativeCtxt, |
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546 dispatchType); |
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547 |
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548 SunDropTargetEvent event = |
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549 new SunDropTargetEvent(component, eventID, x, y, dispatcher); |
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550 |
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551 if (dispatchType == SunDropTargetContextPeer.DISPATCH_SYNC) { |
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552 DataTransferer.getInstance().getToolkitThreadBlockedHandler().lock(); |
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553 } |
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554 |
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555 // schedule callback |
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556 SunToolkit.postEvent(appContext, event); |
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557 |
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558 eventPosted(event); |
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559 |
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560 if (dispatchType == SunDropTargetContextPeer.DISPATCH_SYNC) { |
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561 while (!dispatcher.isDone()) { |
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562 DataTransferer.getInstance().getToolkitThreadBlockedHandler().enter(); |
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563 } |
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564 |
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565 DataTransferer.getInstance().getToolkitThreadBlockedHandler().unlock(); |
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566 |
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567 // return target's response |
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568 return dispatcher.getReturnValue(); |
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569 } else { |
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570 return 0; |
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571 } |
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572 } |
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573 |
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574 /** |
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575 * acceptDrag |
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576 */ |
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577 |
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578 public synchronized void acceptDrag(int dragOperation) { |
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579 if (currentDT == null) { |
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580 throw new InvalidDnDOperationException("No Drag pending"); |
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581 } |
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582 currentDA = mapOperation(dragOperation); |
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583 if (currentDA != DnDConstants.ACTION_NONE) { |
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584 dragRejected = false; |
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585 } |
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586 } |
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587 |
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588 /** |
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589 * rejectDrag |
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590 */ |
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591 |
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592 public synchronized void rejectDrag() { |
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593 if (currentDT == null) { |
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594 throw new InvalidDnDOperationException("No Drag pending"); |
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595 } |
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596 currentDA = DnDConstants.ACTION_NONE; |
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597 dragRejected = true; |
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598 } |
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599 |
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600 /** |
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601 * acceptDrop |
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602 */ |
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603 |
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604 public synchronized void acceptDrop(int dropOperation) { |
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605 if (dropOperation == DnDConstants.ACTION_NONE) |
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606 throw new IllegalArgumentException("invalid acceptDrop() action"); |
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607 |
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608 if (dropStatus != STATUS_WAIT) { |
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609 throw new InvalidDnDOperationException("invalid acceptDrop()"); |
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610 } |
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611 |
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612 currentDA = currentA = mapOperation(dropOperation & currentSA); |
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613 |
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614 dropStatus = STATUS_ACCEPT; |
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615 dropComplete = false; |
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616 } |
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617 |
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618 /** |
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619 * reject Drop |
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620 */ |
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621 |
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622 public synchronized void rejectDrop() { |
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623 if (dropStatus != STATUS_WAIT) { |
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624 throw new InvalidDnDOperationException("invalid rejectDrop()"); |
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625 } |
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626 dropStatus = STATUS_REJECT; |
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627 /* |
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628 * Fix for 4285634. |
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629 * The target rejected the drop means that it doesn't perform any |
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630 * drop action. This change is to make Solaris behavior consistent |
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631 * with Win32. |
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632 */ |
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633 currentDA = DnDConstants.ACTION_NONE; |
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634 dropComplete(false); |
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635 } |
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636 |
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637 /** |
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638 * mapOperation |
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639 */ |
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640 |
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641 private int mapOperation(int operation) { |
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642 int[] operations = { |
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643 DnDConstants.ACTION_MOVE, |
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644 DnDConstants.ACTION_COPY, |
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645 DnDConstants.ACTION_LINK, |
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646 }; |
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647 int ret = DnDConstants.ACTION_NONE; |
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648 |
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649 for (int i = 0; i < operations.length; i++) { |
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650 if ((operation & operations[i]) == operations[i]) { |
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651 ret = operations[i]; |
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652 break; |
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653 } |
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654 } |
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655 |
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656 return ret; |
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657 } |
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658 |
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659 /** |
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660 * signal drop complete |
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661 */ |
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662 |
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663 public synchronized void dropComplete(boolean success) { |
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664 if (dropStatus == STATUS_NONE) { |
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665 throw new InvalidDnDOperationException("No Drop pending"); |
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666 } |
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667 |
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668 if (currentDTC != null) currentDTC.removeNotify(); |
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669 |
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670 currentDT = null; |
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671 currentDTC = null; |
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672 currentT = null; |
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673 currentA = DnDConstants.ACTION_NONE; |
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674 |
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675 synchronized(_globalLock) { |
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676 currentJVMLocalSourceTransferable = null; |
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677 } |
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678 |
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679 dropStatus = STATUS_NONE; |
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680 dropComplete = true; |
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681 |
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682 try { |
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683 doDropDone(success, currentDA, local != null); |
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684 } finally { |
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685 currentDA = DnDConstants.ACTION_NONE; |
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686 // The native context is invalid after the drop is done. |
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687 // Clear the reference to prohibit access. |
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688 nativeDragContext = 0; |
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689 } |
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690 } |
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691 |
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692 protected abstract void doDropDone(boolean success, |
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693 int dropAction, boolean isLocal); |
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694 |
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695 protected synchronized long getNativeDragContext() { |
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696 return nativeDragContext; |
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697 } |
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698 |
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699 protected void eventPosted(SunDropTargetEvent e) {} |
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700 |
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701 protected void eventProcessed(SunDropTargetEvent e, int returnValue, |
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702 boolean dispatcherDone) {} |
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703 |
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704 protected static class EventDispatcher { |
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705 |
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706 private final SunDropTargetContextPeer peer; |
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707 |
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708 // context fields |
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709 private final int dropAction; |
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710 private final int actions; |
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711 private final long[] formats; |
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712 private long nativeCtxt; |
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713 private final boolean dispatchType; |
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714 private boolean dispatcherDone = false; |
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715 |
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716 // dispatcher state fields |
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717 private int returnValue = 0; |
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718 // set of events to be dispatched by this dispatcher |
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719 private final HashSet eventSet = new HashSet(3); |
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720 |
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721 static final ToolkitThreadBlockedHandler handler = |
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722 DataTransferer.getInstance().getToolkitThreadBlockedHandler(); |
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723 |
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724 EventDispatcher(SunDropTargetContextPeer peer, |
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725 int dropAction, |
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726 int actions, |
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727 long[] formats, |
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728 long nativeCtxt, |
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729 boolean dispatchType) { |
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730 |
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731 this.peer = peer; |
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732 this.nativeCtxt = nativeCtxt; |
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733 this.dropAction = dropAction; |
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734 this.actions = actions; |
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735 this.formats = |
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736 (null == formats) ? null : Arrays.copyOf(formats, formats.length); |
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737 this.dispatchType = dispatchType; |
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738 } |
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739 |
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740 void dispatchEvent(SunDropTargetEvent e) { |
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741 int id = e.getID(); |
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742 |
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743 switch (id) { |
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744 case SunDropTargetEvent.MOUSE_ENTERED: |
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745 dispatchEnterEvent(e); |
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746 break; |
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747 case SunDropTargetEvent.MOUSE_DRAGGED: |
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748 dispatchMotionEvent(e); |
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749 break; |
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750 case SunDropTargetEvent.MOUSE_EXITED: |
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751 dispatchExitEvent(e); |
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752 break; |
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753 case SunDropTargetEvent.MOUSE_DROPPED: |
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754 dispatchDropEvent(e); |
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755 break; |
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756 default: |
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757 throw new InvalidDnDOperationException(); |
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758 } |
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759 } |
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760 |
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761 private void dispatchEnterEvent(SunDropTargetEvent e) { |
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762 synchronized (peer) { |
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763 |
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764 // store the drop action here to track operation changes |
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765 peer.previousDA = dropAction; |
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766 |
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767 // setup peer context |
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768 peer.nativeDragContext = nativeCtxt; |
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769 peer.currentT = formats; |
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770 peer.currentSA = actions; |
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771 peer.currentDA = dropAction; |
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772 // To allow data retrieval. |
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773 peer.dropStatus = STATUS_ACCEPT; |
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774 peer.dropComplete = false; |
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775 |
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776 try { |
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777 peer.processEnterMessage(e); |
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778 } finally { |
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779 peer.dropStatus = STATUS_NONE; |
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780 } |
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781 |
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782 setReturnValue(peer.currentDA); |
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783 } |
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784 } |
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785 |
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786 private void dispatchMotionEvent(SunDropTargetEvent e) { |
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787 synchronized (peer) { |
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788 |
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789 boolean operationChanged = peer.previousDA != dropAction; |
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790 peer.previousDA = dropAction; |
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791 |
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792 // setup peer context |
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793 peer.nativeDragContext = nativeCtxt; |
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794 peer.currentT = formats; |
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795 peer.currentSA = actions; |
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796 peer.currentDA = dropAction; |
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797 // To allow data retrieval. |
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798 peer.dropStatus = STATUS_ACCEPT; |
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799 peer.dropComplete = false; |
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800 |
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801 try { |
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802 peer.processMotionMessage(e, operationChanged); |
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803 } finally { |
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804 peer.dropStatus = STATUS_NONE; |
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805 } |
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806 |
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807 setReturnValue(peer.currentDA); |
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808 } |
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809 } |
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810 |
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811 private void dispatchExitEvent(SunDropTargetEvent e) { |
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812 synchronized (peer) { |
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813 |
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814 // setup peer context |
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815 peer.nativeDragContext = nativeCtxt; |
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816 |
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817 peer.processExitMessage(e); |
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818 } |
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819 } |
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820 |
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821 private void dispatchDropEvent(SunDropTargetEvent e) { |
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822 synchronized (peer) { |
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823 |
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824 // setup peer context |
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825 peer.nativeDragContext = nativeCtxt; |
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826 peer.currentT = formats; |
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827 peer.currentSA = actions; |
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828 peer.currentDA = dropAction; |
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829 |
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830 peer.processDropMessage(e); |
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831 } |
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832 } |
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833 |
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834 void setReturnValue(int ret) { |
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835 returnValue = ret; |
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836 } |
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837 |
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838 int getReturnValue() { |
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839 return returnValue; |
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840 } |
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841 |
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842 boolean isDone() { |
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843 return eventSet.isEmpty(); |
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844 } |
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845 |
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846 void registerEvent(SunDropTargetEvent e) { |
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847 handler.lock(); |
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848 if (!eventSet.add(e) && dndLog.isLoggable(Level.FINE)) { |
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849 dndLog.log(Level.FINE, "Event is already registered: " + e); |
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850 } |
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851 handler.unlock(); |
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852 } |
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853 |
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854 void unregisterEvent(SunDropTargetEvent e) { |
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855 handler.lock(); |
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856 try { |
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857 if (!eventSet.remove(e)) { |
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858 // This event has already been unregistered. |
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859 return; |
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860 } |
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861 if (eventSet.isEmpty()) { |
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862 if (!dispatcherDone && dispatchType == DISPATCH_SYNC) { |
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863 handler.exit(); |
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864 } |
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865 dispatcherDone = true; |
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866 } |
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867 } finally { |
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868 handler.unlock(); |
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869 } |
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870 |
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871 try { |
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872 peer.eventProcessed(e, returnValue, dispatcherDone); |
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873 } finally { |
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874 /* |
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875 * Clear the reference to the native context if all copies of |
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876 * the original event are processed. |
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877 */ |
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878 if (dispatcherDone) { |
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879 nativeCtxt = 0; |
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880 // Fix for 6342381 |
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881 peer.nativeDragContext = 0; |
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882 |
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883 } |
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884 } |
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885 } |
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886 |
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887 public void unregisterAllEvents() { |
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888 Object[] events = null; |
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889 handler.lock(); |
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890 try { |
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891 events = eventSet.toArray(); |
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892 } finally { |
|
893 handler.unlock(); |
|
894 } |
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895 |
|
896 if (events != null) { |
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897 for (int i = 0; i < events.length; i++) { |
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898 unregisterEvent((SunDropTargetEvent)events[i]); |
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899 } |
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900 } |
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901 } |
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902 } |
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903 } |