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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 * Steffen Pingel <steffen.pingel@tasktop.com> (Tasktop Technologies Inc.) - [navigation] hyperlink decoration is not erased when mouse is moved out of Text widget - https://bugs.eclipse.org/bugs/show_bug.cgi?id=100278
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11 * Port to the D programming language:
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12 * Frank Benoit <benoit@tionex.de>
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13 *******************************************************************************/
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14 module dwtx.jface.text.hyperlink.HyperlinkManager;
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15
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16 import dwt.dwthelper.utils;
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17
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18 import java.util.ArrayList;
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19 import java.util.Arrays;
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20 import java.util.Iterator;
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21 import java.util.List;
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22
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23 import dwt.DWT;
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24 import dwt.custom.StyledText;
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25 import dwt.events.FocusEvent;
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26 import dwt.events.FocusListener;
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27 import dwt.events.KeyEvent;
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28 import dwt.events.KeyListener;
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29 import dwt.events.MouseEvent;
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30 import dwt.events.MouseListener;
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31 import dwt.events.MouseMoveListener;
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32 import dwt.events.MouseTrackListener;
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33 import dwt.graphics.Point;
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34 import dwt.widgets.Display;
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35 import dwt.widgets.Event;
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36 import dwt.widgets.Listener;
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37 import dwtx.core.runtime.Assert;
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38 import dwtx.jface.text.IRegion;
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39 import dwtx.jface.text.ITextListener;
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40 import dwtx.jface.text.ITextViewer;
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41 import dwtx.jface.text.ITextViewerExtension5;
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42 import dwtx.jface.text.Region;
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43 import dwtx.jface.text.TextEvent;
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44
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45
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46 /**
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47 * Default implementation of a hyperlink manager.
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48 *
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49 * @since 3.1
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50 */
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51 public class HyperlinkManager : ITextListener, Listener, KeyListener, MouseListener, MouseMoveListener, FocusListener, MouseTrackListener {
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52
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53 /**
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54 * Detection strategy.
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55 */
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56 public static final class DETECTION_STRATEGY {
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57
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58 String fName;
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59
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60 private DETECTION_STRATEGY(String name) {
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61 fName= name;
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62 }
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63
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64 /*
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65 * @see java.lang.Object#toString()
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66 */
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67 public String toString() {
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68 return fName;
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69 }
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70 }
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71
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72
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73 /**
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74 * The first detected hyperlink is passed to the
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75 * hyperlink presenter and no further detector
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76 * is consulted.
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77 */
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78 public static final DETECTION_STRATEGY FIRST= new DETECTION_STRATEGY("first"); //$NON-NLS-1$
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79
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80 /**
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81 * All detected hyperlinks from all detectors are collected
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82 * and passed to the hyperlink presenter.
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83 * <p>
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84 * This strategy is only allowed if {@link IHyperlinkPresenter#canShowMultipleHyperlinks()}
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85 * returns <code>true</code>.
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86 * </p>
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87 */
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88 public static final DETECTION_STRATEGY ALL= new DETECTION_STRATEGY("all"); //$NON-NLS-1$
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89
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90 /**
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91 * All detected hyperlinks from all detectors are collected
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92 * and all those with the longest region are passed to the
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93 * hyperlink presenter.
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94 * <p>
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95 * This strategy is only allowed if {@link IHyperlinkPresenter#canShowMultipleHyperlinks()}
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96 * returns <code>true</code>.
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97 * </p>
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98 */
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99 public static final DETECTION_STRATEGY LONGEST_REGION_ALL= new DETECTION_STRATEGY("all with same longest region"); //$NON-NLS-1$
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100
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101 /**
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102 * All detected hyperlinks from all detectors are collected
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103 * and form all those with the longest region only the first
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104 * one is passed to the hyperlink presenter.
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105 */
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106 public static final DETECTION_STRATEGY LONGEST_REGION_FIRST= new DETECTION_STRATEGY("first with longest region"); //$NON-NLS-1$
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107
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108
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109 /** The text viewer on which this hyperlink manager works. */
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110 private ITextViewer fTextViewer;
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111 /** The session is active. */
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112 private bool fActive;
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113 /** The key modifier mask. */
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114 private int fHyperlinkStateMask;
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115 /**
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116 * The active key modifier mask.
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117 * @since 3.3
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118 */
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119 private int fActiveHyperlinkStateMask;
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120 /** The active hyperlinks. */
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121 private IHyperlink[] fActiveHyperlinks;
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122 /** The hyperlink detectors. */
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123 private IHyperlinkDetector[] fHyperlinkDetectors;
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124 /** The hyperlink presenter. */
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125 private IHyperlinkPresenter fHyperlinkPresenter;
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126 /** The detection strategy. */
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127 private final DETECTION_STRATEGY fDetectionStrategy;
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128
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129
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130 /**
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131 * Creates a new hyperlink manager.
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132 *
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133 * @param detectionStrategy the detection strategy one of {{@link #ALL}, {@link #FIRST}, {@link #LONGEST_REGION_ALL}, {@link #LONGEST_REGION_FIRST}}
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134 */
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135 public HyperlinkManager(DETECTION_STRATEGY detectionStrategy) {
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136 Assert.isNotNull(detectionStrategy);
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137 fDetectionStrategy= detectionStrategy;
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138 }
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139
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140 /**
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141 * Installs this hyperlink manager with the given arguments.
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142 *
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143 * @param textViewer the text viewer
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144 * @param hyperlinkPresenter the hyperlink presenter
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145 * @param hyperlinkDetectors the array of hyperlink detectors, must not be empty
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146 * @param eventStateMask the DWT event state mask to activate hyperlink mode
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147 */
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148 public void install(ITextViewer textViewer, IHyperlinkPresenter hyperlinkPresenter, IHyperlinkDetector[] hyperlinkDetectors, int eventStateMask) {
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149 Assert.isNotNull(textViewer);
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150 Assert.isNotNull(hyperlinkPresenter);
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151 fTextViewer= textViewer;
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152 fHyperlinkPresenter= hyperlinkPresenter;
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153 Assert.isLegal(fHyperlinkPresenter.canShowMultipleHyperlinks() || fDetectionStrategy is FIRST || fDetectionStrategy is LONGEST_REGION_FIRST);
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154 setHyperlinkDetectors(hyperlinkDetectors);
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155 setHyperlinkStateMask(eventStateMask);
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156
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157 StyledText text= fTextViewer.getTextWidget();
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158 if (text is null || text.isDisposed())
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159 return;
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160
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161 text.getDisplay().addFilter(DWT.KeyUp, this);
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162 text.addKeyListener(this);
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163 text.addMouseListener(this);
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164 text.addMouseMoveListener(this);
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165 text.addFocusListener(this);
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166 text.addMouseTrackListener(this);
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167
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168 fTextViewer.addTextListener(this);
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169
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170 fHyperlinkPresenter.install(fTextViewer);
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171 }
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172
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173 /**
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174 * Sets the hyperlink detectors for this hyperlink manager.
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175 * <p>
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176 * It is allowed to call this method after this
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177 * hyperlink manger has been installed.
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178 * </p>
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179 *
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180 * @param hyperlinkDetectors and array of hyperlink detectors, must not be empty
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181 */
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182 public void setHyperlinkDetectors(IHyperlinkDetector[] hyperlinkDetectors) {
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183 Assert.isTrue(hyperlinkDetectors !is null && hyperlinkDetectors.length > 0);
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184 if (fHyperlinkDetectors is null)
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185 fHyperlinkDetectors= hyperlinkDetectors;
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186 else {
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187 synchronized (fHyperlinkDetectors) {
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188 fHyperlinkDetectors= hyperlinkDetectors;
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189 }
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190 }
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191 }
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192
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193 /**
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194 * Sets the DWT event state mask which in combination
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195 * with the left mouse button triggers the hyperlink mode.
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196 * <p>
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197 * It is allowed to call this method after this
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198 * hyperlink manger has been installed.
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199 * </p>
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200 *
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201 * @param eventStateMask the DWT event state mask to activate hyperlink mode
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202 */
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203 public void setHyperlinkStateMask(int eventStateMask) {
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204 fHyperlinkStateMask= eventStateMask;
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205 }
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206
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207 /**
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208 * Uninstalls this hyperlink manager.
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209 */
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210 public void uninstall() {
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211 deactivate();
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212
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213 StyledText text= fTextViewer.getTextWidget();
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214 if (text !is null && !text.isDisposed()) {
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215 text.removeKeyListener(this);
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216 text.getDisplay().removeFilter(DWT.KeyUp, this);
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217 text.removeMouseListener(this);
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218 text.removeMouseMoveListener(this);
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219 text.removeFocusListener(this);
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220 text.removeMouseTrackListener(this);
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221 }
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222 fTextViewer.removeTextListener(this);
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223
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224 fHyperlinkPresenter.uninstall();
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225
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226 fHyperlinkPresenter= null;
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227 fTextViewer= null;
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228 fHyperlinkDetectors= null;
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229 }
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230
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231 /**
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232 * Deactivates the currently shown hyperlinks.
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233 */
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234 protected void deactivate() {
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235 fHyperlinkPresenter.hideHyperlinks();
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236 fActive= false;
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237 }
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238
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239 /**
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240 * Finds hyperlinks at the current offset.
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241 *
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242 * @return the hyperlinks or <code>null</code> if none.
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243 */
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244 protected IHyperlink[] findHyperlinks() {
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245 int offset= getCurrentTextOffset();
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246 if (offset is -1)
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247 return null;
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248
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249 bool canShowMultipleHyperlinks= fHyperlinkPresenter.canShowMultipleHyperlinks();
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250 IRegion region= new Region(offset, 0);
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251 List allHyperlinks= new ArrayList(fHyperlinkDetectors.length * 2);
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252 synchronized (fHyperlinkDetectors) {
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253 for (int i= 0, length= fHyperlinkDetectors.length; i < length; i++) {
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254 IHyperlinkDetector detector= fHyperlinkDetectors[i];
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255 if (detector is null)
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256 continue;
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257
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258 if (detector instanceof IHyperlinkDetectorExtension2) {
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259 int stateMask= ((IHyperlinkDetectorExtension2)detector).getStateMask();
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260 if (stateMask !is -1 && stateMask !is fActiveHyperlinkStateMask)
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261 continue;
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262 else if (stateMask is -1 && fActiveHyperlinkStateMask !is fHyperlinkStateMask)
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263 continue;
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264 } else if (fActiveHyperlinkStateMask !is fHyperlinkStateMask)
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265 continue;
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266
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267 IHyperlink[] hyperlinks= detector.detectHyperlinks(fTextViewer, region, canShowMultipleHyperlinks);
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268 if (hyperlinks is null)
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269 continue;
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270
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271 Assert.isLegal(hyperlinks.length > 0);
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272
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273 if (fDetectionStrategy is FIRST) {
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274 if (hyperlinks.length is 1)
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275 return hyperlinks;
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276 return new IHyperlink[] {hyperlinks[0]};
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277 }
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278 allHyperlinks.addAll(Arrays.asList(hyperlinks));
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279 }
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280 }
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281
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282 if (allHyperlinks.isEmpty())
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283 return null;
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284
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285 if (fDetectionStrategy !is ALL) {
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286 int maxLength= computeLongestHyperlinkLength(allHyperlinks);
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287 Iterator iter= new ArrayList(allHyperlinks).iterator();
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288 while (iter.hasNext()) {
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289 IHyperlink hyperlink= (IHyperlink)iter.next();
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290 if (hyperlink.getHyperlinkRegion().getLength() < maxLength)
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291 allHyperlinks.remove(hyperlink);
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292 }
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293 }
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294
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295 if (fDetectionStrategy is LONGEST_REGION_FIRST)
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296 return new IHyperlink[] {(IHyperlink)allHyperlinks.get(0)};
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297
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298 return (IHyperlink[])allHyperlinks.toArray(new IHyperlink[allHyperlinks.size()]);
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299
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300 }
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301
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302 /**
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303 * Computes the length of the longest detected
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304 * hyperlink.
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305 *
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306 * @param hyperlinks
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307 * @return the length of the longest detected
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308 */
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309 protected int computeLongestHyperlinkLength(List hyperlinks) {
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310 Assert.isLegal(hyperlinks !is null && !hyperlinks.isEmpty());
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311 Iterator iter= hyperlinks.iterator();
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312 int length= Integer.MIN_VALUE;
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313 while (iter.hasNext()) {
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314 IRegion region= ((IHyperlink)iter.next()).getHyperlinkRegion();
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315 if (region.getLength() < length)
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316 continue;
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317 length= region.getLength();
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318 }
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319 return length;
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320 }
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321
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322 /**
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323 * Returns the current text offset.
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324 *
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325 * @return the current text offset
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326 */
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327 protected int getCurrentTextOffset() {
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328
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329 try {
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330 StyledText text= fTextViewer.getTextWidget();
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331 if (text is null || text.isDisposed())
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332 return -1;
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333
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334 Display display= text.getDisplay();
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335 Point absolutePosition= display.getCursorLocation();
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336 Point relativePosition= text.toControl(absolutePosition);
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337
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338 int widgetOffset= text.getOffsetAtLocation(relativePosition);
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339 Point p= text.getLocationAtOffset(widgetOffset);
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340 if (p.x > relativePosition.x)
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341 widgetOffset--;
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342
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343 if (fTextViewer instanceof ITextViewerExtension5) {
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344 ITextViewerExtension5 extension= (ITextViewerExtension5)fTextViewer;
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345 return extension.widgetOffset2ModelOffset(widgetOffset);
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346 }
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347
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348 return widgetOffset + fTextViewer.getVisibleRegion().getOffset();
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349
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350 } catch (IllegalArgumentException e) {
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351 return -1;
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352 }
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353 }
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354
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355 /*
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356 * @see dwt.events.KeyListener#keyPressed(dwt.events.KeyEvent)
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357 */
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358 public void keyPressed(KeyEvent event) {
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359
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360 if (fActive) {
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361 deactivate();
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362 return;
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363 }
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364
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365 if (!isRegisteredStateMask(event.keyCode)) {
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366 deactivate();
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367 return;
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368 }
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369
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370 fActive= true;
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371 fActiveHyperlinkStateMask= event.keyCode;
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372
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373 // removed for #25871 (hyperlinks could interact with typing)
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374 //
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375 // ITextViewer viewer= getSourceViewer();
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376 // if (viewer is null)
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377 // return;
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378 //
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379 // IRegion region= getCurrentTextRegion(viewer);
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380 // if (region is null)
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381 // return;
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382 //
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383 // highlightRegion(viewer, region);
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384 // activateCursor(viewer);
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385 }
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386
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387 /*
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388 * @see dwt.events.KeyListener#keyReleased(dwt.events.KeyEvent)
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389 */
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390 public void keyReleased(KeyEvent event) {
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391 }
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392
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393 /*
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394 * @see dwt.events.MouseListener#mouseDoubleClick(dwt.events.MouseEvent)
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395 */
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396 public void mouseDoubleClick(MouseEvent e) {
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397
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398 }
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399
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400 /*
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401 * @see dwt.events.MouseListener#mouseDown(dwt.events.MouseEvent)
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402 */
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403 public void mouseDown(MouseEvent event) {
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404
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405 if (!fActive)
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406 return;
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407
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408 if (event.stateMask !is fActiveHyperlinkStateMask) {
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409 deactivate();
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410 return;
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411 }
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412
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413 if (event.button !is 1) {
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414 deactivate();
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415 return;
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416 }
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417 }
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418
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419 /*
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420 * @see dwt.events.MouseListener#mouseUp(dwt.events.MouseEvent)
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421 */
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422 public void mouseUp(MouseEvent e) {
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423
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424 if (!fActive) {
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425 fActiveHyperlinks= null;
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426 return;
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427 }
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428
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429 if (e.button !is 1)
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430 fActiveHyperlinks= null;
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431
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432 deactivate();
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433
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434 if (fActiveHyperlinks !is null)
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435 fActiveHyperlinks[0].open();
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436 }
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437
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438 /*
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439 * @see dwt.events.MouseMoveListener#mouseMove(dwt.events.MouseEvent)
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440 */
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441 public void mouseMove(MouseEvent event) {
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442 if (fHyperlinkPresenter instanceof IHyperlinkPresenterExtension) {
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443 if (!((IHyperlinkPresenterExtension)fHyperlinkPresenter).canHideHyperlinks())
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444 return;
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445 }
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446
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447 if (!isRegisteredStateMask(event.stateMask)) {
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448 if (fActive)
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449 deactivate();
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450
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451 return;
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452 }
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453
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454 fActive= true;
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455 fActiveHyperlinkStateMask= event.stateMask;
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456
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457 StyledText text= fTextViewer.getTextWidget();
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458 if (text is null || text.isDisposed()) {
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459 deactivate();
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460 return;
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|
|
461 }
|
|
|
462
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|
|
463 if ((event.stateMask & DWT.BUTTON1) !is 0 && text.getSelectionCount() !is 0) {
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464 deactivate();
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465 return;
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|
|
466 }
|
|
|
467
|
|
|
468 fActiveHyperlinks= findHyperlinks();
|
|
|
469 if (fActiveHyperlinks is null || fActiveHyperlinks.length is 0) {
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|
|
470 fHyperlinkPresenter.hideHyperlinks();
|
|
|
471 return;
|
|
|
472 }
|
|
|
473
|
|
|
474 fHyperlinkPresenter.showHyperlinks(fActiveHyperlinks);
|
|
|
475
|
|
|
476 }
|
|
|
477
|
|
|
478 /**
|
|
|
479 * Checks whether the given state mask is registered.
|
|
|
480 *
|
|
|
481 * @param stateMask
|
|
|
482 * @return <code>true</code> if a detector is registered for the given state mask
|
|
|
483 * @since 3.3
|
|
|
484 */
|
|
|
485 private bool isRegisteredStateMask(int stateMask) {
|
|
|
486 if (stateMask is fHyperlinkStateMask)
|
|
|
487 return true;
|
|
|
488
|
|
|
489 synchronized (fHyperlinkDetectors) {
|
|
|
490 for (int i= 0; i < fHyperlinkDetectors.length; i++) {
|
|
|
491 if (fHyperlinkDetectors[i] instanceof IHyperlinkDetectorExtension2) {
|
|
|
492 if (stateMask is ((IHyperlinkDetectorExtension2)fHyperlinkDetectors[i]).getStateMask())
|
|
|
493 return true;
|
|
|
494 }
|
|
|
495 }
|
|
|
496 }
|
|
|
497 return false;
|
|
|
498 }
|
|
|
499
|
|
|
500 /*
|
|
|
501 * @see dwt.events.FocusListener#focusGained(dwt.events.FocusEvent)
|
|
|
502 */
|
|
|
503 public void focusGained(FocusEvent e) {}
|
|
|
504
|
|
|
505 /*
|
|
|
506 * @see dwt.events.FocusListener#focusLost(dwt.events.FocusEvent)
|
|
|
507 */
|
|
|
508 public void focusLost(FocusEvent event) {
|
|
|
509 deactivate();
|
|
|
510 }
|
|
|
511
|
|
|
512 /*
|
|
|
513 * @see dwt.widgets.Listener#handleEvent(dwt.widgets.Event)
|
|
|
514 * @since 3.2
|
|
|
515 */
|
|
|
516 public void handleEvent(Event event) {
|
|
|
517 //key up
|
|
|
518 deactivate();
|
|
|
519 }
|
|
|
520
|
|
|
521 /*
|
|
|
522 * @see dwtx.jface.text.ITextListener#textChanged(TextEvent)
|
|
|
523 * @since 3.2
|
|
|
524 */
|
|
|
525 public void textChanged(TextEvent event) {
|
|
|
526 if (event.getDocumentEvent() !is null)
|
|
|
527 deactivate();
|
|
|
528 }
|
|
|
529
|
|
|
530 /**
|
|
|
531 * {@inheritDoc}
|
|
|
532 *
|
|
|
533 * @since 3.4
|
|
|
534 */
|
|
|
535 public void mouseExit(MouseEvent e) {
|
|
|
536 if (fHyperlinkPresenter instanceof IHyperlinkPresenterExtension) {
|
|
|
537 if (!((IHyperlinkPresenterExtension)fHyperlinkPresenter).canHideHyperlinks())
|
|
|
538 return;
|
|
|
539 }
|
|
|
540 deactivate();
|
|
|
541 }
|
|
|
542
|
|
|
543 /**
|
|
|
544 * {@inheritDoc}
|
|
|
545 *
|
|
|
546 * @since 3.4
|
|
|
547 */
|
|
|
548 public void mouseEnter(MouseEvent e) {
|
|
|
549 }
|
|
|
550
|
|
|
551 /**
|
|
|
552 * {@inheritDoc}
|
|
|
553 *
|
|
|
554 * @since 3.4
|
|
|
555 */
|
|
|
556 public void mouseHover(MouseEvent e) {
|
|
|
557 }
|
|
|
558
|
|
|
559 }
|
