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annotate org.eclipse.jface.text/src/org/eclipse/jface/text/hyperlink/URLHyperlinkDetector.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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children dbfb303e8fb0
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 * Benjamin Muskalla <b.muskalla@gmx.net> - https://bugs.eclipse.org/bugs/show_bug.cgi?id=156433
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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 org.eclipse.jface.text.hyperlink.URLHyperlinkDetector;
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15
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16 import org.eclipse.jface.text.hyperlink.IHyperlinkPresenterExtension; // packageimport
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17 import org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter; // packageimport
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18 import org.eclipse.jface.text.hyperlink.HyperlinkManager; // packageimport
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19 import org.eclipse.jface.text.hyperlink.URLHyperlink; // packageimport
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20 import org.eclipse.jface.text.hyperlink.IHyperlinkDetectorExtension2; // packageimport
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21 import org.eclipse.jface.text.hyperlink.IHyperlinkDetector; // packageimport
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22 import org.eclipse.jface.text.hyperlink.IHyperlinkPresenter; // packageimport
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23 import org.eclipse.jface.text.hyperlink.DefaultHyperlinkPresenter; // packageimport
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24 import org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector; // packageimport
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25 import org.eclipse.jface.text.hyperlink.IHyperlinkDetectorExtension; // packageimport
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26 import org.eclipse.jface.text.hyperlink.HyperlinkMessages; // packageimport
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27 import org.eclipse.jface.text.hyperlink.IHyperlink; // packageimport
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28
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29 import java.lang.all;
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30 import java.util.Set;
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31
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32 import org.eclipse.dwtxhelper.MalformedURLException;
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33 import org.eclipse.dwtxhelper.URL;
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34 import org.eclipse.dwtxhelper.StringTokenizer;
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35
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36 import org.eclipse.jface.text.BadLocationException;
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37 import org.eclipse.jface.text.IDocument;
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38 import org.eclipse.jface.text.IRegion;
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39 import org.eclipse.jface.text.ITextViewer;
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40 import org.eclipse.jface.text.Region;
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41
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42
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43 /**
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44 * URL hyperlink detector.
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45 *
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46 * @since 3.1
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47 */
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48 public class URLHyperlinkDetector : AbstractHyperlinkDetector {
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50
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51 /**
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52 * Creates a new URL hyperlink detector.
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53 *
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54 * @since 3.2
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55 */
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56 public this() {
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57 }
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58
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59 /**
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60 * Creates a new URL hyperlink detector.
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61 *
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62 * @param textViewer the text viewer in which to detect the hyperlink
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63 * @deprecated As of 3.2, replaced by {@link URLHyperlinkDetector}
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64 */
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65 public this(ITextViewer textViewer) {
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66 }
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67
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68 /*
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69 * @see org.eclipse.jface.text.hyperlink.IHyperlinkDetector#detectHyperlinks(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion, bool)
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70 */
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71 public IHyperlink[] detectHyperlinks(ITextViewer textViewer, IRegion region, bool canShowMultipleHyperlinks) {
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72 if (region is null || textViewer is null)
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73 return null;
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74
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75 IDocument document= textViewer.getDocument();
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76
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77 int offset= region.getOffset();
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78
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79 String urlString= null;
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80 if (document is null)
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81 return null;
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82
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83 IRegion lineInfo;
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84 String line;
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85 try {
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86 lineInfo= document.getLineInformationOfOffset(offset);
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87 line= document.get(lineInfo.getOffset(), lineInfo.getLength());
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88 } catch (BadLocationException ex) {
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89 return null;
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90 }
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91
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92 int offsetInLine= offset - lineInfo.getOffset();
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93
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94 bool startDoubleQuote= false;
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95 int urlOffsetInLine= 0;
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96 int urlLength= 0;
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97
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98 int urlSeparatorOffset= line.indexOf("://"); //$NON-NLS-1$
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99 while (urlSeparatorOffset >= 0) {
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100
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101 // URL protocol (left to "://")
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102 urlOffsetInLine= urlSeparatorOffset;
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103 char ch;
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104 do {
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105 urlOffsetInLine--;
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106 ch= ' ';
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107 if (urlOffsetInLine > -1)
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108 ch= line.charAt(urlOffsetInLine);
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109 startDoubleQuote= ch is '"';
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110 } while (Character.isUnicodeIdentifierStart(ch));
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111 urlOffsetInLine++;
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112
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113 // Right to "://"
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114 StringTokenizer tokenizer= new StringTokenizer(line.substring(urlSeparatorOffset + 3), " \t\n\r\f<>", false); //$NON-NLS-1$
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115 if (!tokenizer.hasMoreTokens())
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116 return null;
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117
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118 urlLength= tokenizer.nextToken().length() + 3 + urlSeparatorOffset - urlOffsetInLine;
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119 if (offsetInLine >= urlOffsetInLine && offsetInLine <= urlOffsetInLine + urlLength)
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120 break;
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121
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122 urlSeparatorOffset= line.indexOf("://", urlSeparatorOffset + 1); //$NON-NLS-1$
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123 }
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124
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125 if (urlSeparatorOffset < 0)
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126 return null;
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127
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128 if (startDoubleQuote) {
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129 int endOffset= -1;
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130 int nextDoubleQuote= line.indexOf('"', urlOffsetInLine);
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131 int nextWhitespace= line.indexOf(' ', urlOffsetInLine);
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132 if (nextDoubleQuote !is -1 && nextWhitespace !is -1)
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133 endOffset= Math.min(nextDoubleQuote, nextWhitespace);
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134 else if (nextDoubleQuote !is -1)
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135 endOffset= nextDoubleQuote;
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136 else if (nextWhitespace !is -1)
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137 endOffset= nextWhitespace;
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138 if (endOffset !is -1)
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139 urlLength= endOffset - urlOffsetInLine;
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140 }
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141
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142 // Set and validate URL string
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143 try {
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144 urlString= line.substring(urlOffsetInLine, urlOffsetInLine + urlLength);
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145 new URL(urlString);
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146 } catch (MalformedURLException ex) {
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147 urlString= null;
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148 return null;
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149 }
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150
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151 IRegion urlRegion= new Region(lineInfo.getOffset() + urlOffsetInLine, urlLength);
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152 return [new URLHyperlink(urlRegion, urlString)];
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153 }
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154
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155 }