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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13
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131
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14
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15 import dwtx.jface.internal.text.link.contentassist.IProposalListener; // packageimport
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16 import dwtx.jface.internal.text.link.contentassist.LineBreakingReader; // packageimport
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17 import dwtx.jface.internal.text.link.contentassist.CompletionProposalPopup2; // packageimport
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18 import dwtx.jface.internal.text.link.contentassist.ContextInformationPopup2; // packageimport
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19 import dwtx.jface.internal.text.link.contentassist.ContentAssistMessages; // packageimport
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20 import dwtx.jface.internal.text.link.contentassist.Helper2; // packageimport
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21 import dwtx.jface.internal.text.link.contentassist.PopupCloser2; // packageimport
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22 import dwtx.jface.internal.text.link.contentassist.IContentAssistListener2; // packageimport
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23 import dwtx.jface.internal.text.link.contentassist.ContentAssistant2; // packageimport
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24
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129
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25 module dwtx.jface.internal.text.link.contentassist.AdditionalInfoController2;
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26
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27 import dwt.dwthelper.utils;
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28
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29
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30
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31
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32
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33 import dwt.events.SelectionEvent;
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34 import dwt.events.SelectionListener;
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35 import dwt.graphics.Point;
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36 import dwt.graphics.Rectangle;
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37 import dwt.widgets.Control;
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38 import dwt.widgets.Table;
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39 import dwt.widgets.TableItem;
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40 import dwtx.core.runtime.Assert;
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41 import dwtx.jface.text.AbstractInformationControlManager;
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42 import dwtx.jface.text.IInformationControl;
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43 import dwtx.jface.text.IInformationControlCreator;
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44 import dwtx.jface.text.contentassist.ICompletionProposal;
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45 import dwtx.jface.text.contentassist.ICompletionProposalExtension3;
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46
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47
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48
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49 /**
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50 * Displays the additional information available for a completion proposal.
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51 *
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52 * @since 2.0
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53 */
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54 class AdditionalInfoController2 : AbstractInformationControlManager , Runnable {
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55
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56 /**
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57 * Internal table selection listener.
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58 */
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59 private class TableSelectionListener : SelectionListener {
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60
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61 /*
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62 * @see SelectionListener#widgetSelected(SelectionEvent)
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63 */
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64 public void widgetSelected(SelectionEvent e) {
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65 handleTableSelectionChanged();
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66 }
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67
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68 /*
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69 * @see SelectionListener#widgetDefaultSelected(SelectionEvent)
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70 */
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71 public void widgetDefaultSelected(SelectionEvent e) {
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72 }
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73 }
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74
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75
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76 /** The proposal table */
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77 private Table fProposalTable;
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78 /** The thread controlling the delayed display of the additional info */
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79 private Thread fThread;
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80 /** Indicates whether the display delay has been reset */
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81 private bool fIsReset= false;
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82 /** Object to synchronize display thread and table selection changes */
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83 private final Object fMutex= new Object();
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84 /** Thread access lock. */
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85 private final Object fThreadAccess= new Object();
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86 /** Object to synchronize initial display of additional info */
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87 private Object fStartSignal;
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88 /** The table selection listener */
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89 private SelectionListener fSelectionListener= new TableSelectionListener();
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90 /** The delay after which additional information is displayed */
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91 private int fDelay;
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92
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93
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94 /**
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95 * Creates a new additional information controller.
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96 *
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97 * @param creator the information control creator to be used by this controller
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98 * @param delay time in milliseconds after which additional info should be displayed
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99 */
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100 AdditionalInfoController2(IInformationControlCreator creator, int delay) {
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101 super(creator);
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102 fDelay= delay;
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103 setAnchor(ANCHOR_RIGHT);
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130
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104 setFallbackAnchors([ANCHOR_RIGHT, ANCHOR_LEFT, ANCHOR_BOTTOM ]);
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129
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105 }
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106
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107 /*
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108 * @see AbstractInformationControlManager#install(Control)
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109 */
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110 public void install(Control control) {
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111
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112 if (fProposalTable is control) {
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113 // already installed
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114 return;
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115 }
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116
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117 super.install(control);
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118
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119 Assert.isTrue(control instanceof Table);
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120 fProposalTable= (Table) control;
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121 fProposalTable.addSelectionListener(fSelectionListener);
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122 synchronized (fThreadAccess) {
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123 if (fThread !is null)
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124 fThread.interrupt();
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125 fThread= new Thread(this, ContentAssistMessages.getString("InfoPopup.info_delay_timer_name")); //$NON-NLS-1$
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126
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127 fStartSignal= new Object();
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128 synchronized (fStartSignal) {
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129 fThread.start();
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130 try {
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131 // wait until thread is ready
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132 fStartSignal.wait();
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133 } catch (InterruptedException x) {
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134 }
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135 }
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136 }
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137 }
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138
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139 /*
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140 * @see AbstractInformationControlManager#disposeInformationControl()
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141 */
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142 public void disposeInformationControl() {
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143
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144 synchronized (fThreadAccess) {
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145 if (fThread !is null) {
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146 fThread.interrupt();
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147 fThread= null;
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148 }
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149 }
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150
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151 if (fProposalTable !is null && !fProposalTable.isDisposed()) {
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152 fProposalTable.removeSelectionListener(fSelectionListener);
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153 fProposalTable= null;
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154 }
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155
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156 super.disposeInformationControl();
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157 }
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158
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159 /*
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160 * @see java.lang.Runnable#run()
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161 */
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162 public void run() {
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163 try {
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164 while (true) {
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165
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166 synchronized (fMutex) {
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167
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168 if (fStartSignal !is null) {
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169 synchronized (fStartSignal) {
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170 fStartSignal.notifyAll();
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171 fStartSignal= null;
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172 }
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173 }
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174
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175 // Wait for a selection event to occur.
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176 fMutex.wait();
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177
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178 while (true) {
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179 fIsReset= false;
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180 // Delay before showing the popup.
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181 fMutex.wait(fDelay);
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182 if (!fIsReset)
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183 break;
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184 }
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185 }
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186
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187 if (fProposalTable !is null && !fProposalTable.isDisposed()) {
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188 fProposalTable.getDisplay().asyncExec(new Runnable() {
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189 public void run() {
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190 if (!fIsReset)
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191 showInformation();
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192 }
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193 });
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194 }
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195
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196 }
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197 } catch (InterruptedException e) {
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198 }
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199
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200 synchronized (fThreadAccess) {
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201 // only null fThread if it is us!
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202 if (Thread.currentThread() is fThread)
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203 fThread= null;
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204 }
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205 }
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206
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207 /**
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208 *Handles a change of the line selected in the associated selector.
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209 */
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210 public void handleTableSelectionChanged() {
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211
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212 if (fProposalTable !is null && !fProposalTable.isDisposed() && fProposalTable.isVisible()) {
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213 synchronized (fMutex) {
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214 fIsReset= true;
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215 fMutex.notifyAll();
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216 }
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217 }
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218 }
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219
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220 /*
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221 * @see AbstractInformationControlManager#computeInformation()
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222 */
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223 protected void computeInformation() {
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224
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225 if (fProposalTable is null || fProposalTable.isDisposed())
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226 return;
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227
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228 TableItem[] selection= fProposalTable.getSelection();
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229 if (selection !is null && selection.length > 0) {
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230
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231 TableItem item= selection[0];
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232
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233 // compute information
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234 String information= null;
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235 Object d= item.getData();
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236
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237 if (d instanceof ICompletionProposal) {
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238 ICompletionProposal p= (ICompletionProposal) d;
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239 information= p.getAdditionalProposalInfo();
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240 }
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241
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242 if (d instanceof ICompletionProposalExtension3)
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243 setCustomInformationControlCreator(((ICompletionProposalExtension3) d).getInformationControlCreator());
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244 else
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245 setCustomInformationControlCreator(null);
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246
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247 // compute subject area
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248 setMargins(4, -1);
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249 Rectangle area= fProposalTable.getBounds();
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250 area.x= 0; // subject area is the whole subject control
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251 area.y= 0;
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252
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253 // set information & subject area
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254 setInformation(information, area);
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255 }
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256 }
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257
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258 /*
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259 * @see dwtx.jface.text.AbstractInformationControlManager#computeSizeConstraints(Control, IInformationControl)
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260 */
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261 protected Point computeSizeConstraints(Control subjectControl, IInformationControl informationControl) {
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262 // at least as big as the proposal table
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263 Point sizeConstraint= super.computeSizeConstraints(subjectControl, informationControl);
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264 Point size= subjectControl.getSize();
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265 if (sizeConstraint.x < size.x)
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266 sizeConstraint.x= size.x;
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267 if (sizeConstraint.y < size.y)
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268 sizeConstraint.y= size.y;
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269 return sizeConstraint;
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270 }
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271 }
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272
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273
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