annotate dwtx/jface/text/IDocument.d @ 129:eb30df5ca28b

Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
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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 * 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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14 module dwtx.jface.text.IDocument;
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15
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16 import dwt.dwthelper.utils;
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17
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18
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19 /**
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20 * An <code>IDocument</code> represents text providing support for
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21 * <ul>
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22 * <li> text manipulation
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23 * <li> positions
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24 * <li> partitions
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25 * <li> line information
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26 * <li> document change listeners
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27 * <li> document partition change listeners
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28 * </ul>
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29 *
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30 * A document allows to set its content and to manipulate it. For manipulation
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31 * a document provides the <code>replace</code> method which substitutes a given
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32 * string for a specified text range in the document. On each document change, all
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33 * registered document listeners are informed exactly once.
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34 * <p>
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35 * Positions are stickers to the document's text that are updated when the
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36 * document is changed. Positions are updated by {@link dwtx.jface.text.IPositionUpdater}s. Position
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37 * updaters are managed as a list. The list defines the sequence in which position
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38 * updaters are invoked. This way, position updaters may rely on each other.
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39 * Positions are grouped into categories. A category is a ordered list of positions.
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40 * the document defines the order of position in a category based on the position's offset
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41 * based on the implementation of the method <code>computeIndexInCategory</code>.
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42 * Each document must support a default position category whose name is specified by this
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43 * interface.</p>
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44 * <p>
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45 * A document can be considered consisting of a sequence of not overlapping partitions.
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46 * A partition is defined by its offset, its length, and its type. Partitions are
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47 * updated on every document manipulation and ensured to be up-to-date when the document
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48 * listeners are informed. A document uses an <code>IDocumentPartitioner</code> to
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49 * manage its partitions. A document may be unpartitioned which happens when there is no
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50 * partitioner. In this case, the document is considered as one single partition of a
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51 * default type. The default type is specified by this interface. If a document change
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52 * changes the document's partitioning all registered partitioning listeners are
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53 * informed exactly once. The extension interface {@link dwtx.jface.text.IDocumentExtension3}
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54 * introduced in version 3.0 extends the concept of partitions and allows a document to
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55 * not only manage one but multiple partitioning. Each partitioning has an id which must
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56 * be used to refer to a particular partitioning.</p>
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57 * <p>
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58 * An <code>IDocument</code> provides methods to map line numbers and character
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59 * positions onto each other based on the document's line delimiters. When moving text
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60 * between documents using different line delimiters, the text must be converted to
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61 * use the target document's line delimiters.</p>
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62 * <p>
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63 * An <code>IDocument</code> does not care about mixed line delimiters. Clients who
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64 * want to ensure a single line delimiter in their document should use the line
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65 * delimiter returned by {@link dwtx.jface.text.TextUtilities#getDefaultLineDelimiter(IDocument)}.</p>
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66 * <p>
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67 * <code>IDocument</code> throws <code>BadLocationException</code> if the parameters of
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68 * queries or manipulation requests are not inside the bounds of the document. The purpose
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69 * of this style of exception handling is
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70 * <ul>
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71 * <li> prepare document for multi-thread access
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72 * <li> allow clients to implement backtracking recovery methods
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73 * <li> prevent clients from up-front contract checking when dealing with documents.
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74 * </ul></p>
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75 * <p>
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76 * A document support for searching has deprecated since version 3.0. The recommended way
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77 * for searching is to use a {@link dwtx.jface.text.FindReplaceDocumentAdapter}.</p>
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78 * <p>
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79 * In order to provide backward compatibility for clients of <code>IDocument</code>, extension
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80 * interfaces are used to provide a means of evolution. The following extension interfaces
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81 * exist:
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82 * <ul>
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83 * <li> {@link dwtx.jface.text.IDocumentExtension} since version 2.0 introducing the concept
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84 * of post notification replaces in order to allow document listeners to manipulate the document
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85 * while receiving a document change notification </li>
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86 * <li> {@link dwtx.jface.text.IDocumentExtension2} since version 2.1 introducing configuration
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87 * methods for post notification replaces and document change notification. </li>
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88 * <li> {@link dwtx.jface.text.IDocumentExtension3} since version 3.0 replacing the original
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89 * partitioning concept by allowing multiple partitionings at the same time and introducing zero-
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90 * length partitions in conjunction with the distinction between open and closed partitions. </li>
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91 * <li> {@link dwtx.jface.text.IDocumentExtension4} since version 3.1 introducing the
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92 * concept of rewrite sessions. A rewrite session is a sequence of document replace operations
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93 * that form a semantic unit. It also introduces a modification stamp and the ability to
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94 * set the initial line delimiter and to query the default line delimiter.</li>
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95 * </ul></p>
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96 * <p>
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97 * Clients may implement this interface and its extension interfaces or use the default
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98 * implementation provided by <code>AbstractDocument</code> and <code>Document</code>.</p>
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99 *
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100 * @see dwtx.jface.text.IDocumentExtension
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101 * @see dwtx.jface.text.IDocumentExtension2
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102 * @see dwtx.jface.text.IDocumentExtension3
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103 * @see dwtx.jface.text.IDocumentExtension4
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104 * @see dwtx.jface.text.Position
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105 * @see dwtx.jface.text.IPositionUpdater
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106 * @see dwtx.jface.text.IDocumentPartitioner
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107 * @see dwtx.jface.text.ILineTracker
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108 * @see dwtx.jface.text.IDocumentListener
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109 * @see dwtx.jface.text.IDocumentPartitioningListener
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110 */
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111 public interface IDocument {
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112
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113
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114 /**
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115 * The identifier of the default position category.
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116 */
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117 final static String DEFAULT_CATEGORY= "__dflt_position_category"; //$NON-NLS-1$
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118
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119 /**
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120 * The identifier of the default partition content type.
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121 */
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122 final static String DEFAULT_CONTENT_TYPE= "__dftl_partition_content_type"; //$NON-NLS-1$
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123
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124
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125
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126
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127 /* --------------- text access and manipulation --------------------------- */
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128
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129 /**
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130 * Returns the character at the given document offset in this document.
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131 *
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132 * @param offset a document offset
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133 * @return the character at the offset
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134 * @exception BadLocationException if the offset is invalid in this document
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135 */
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136 char getChar(int offset) throws BadLocationException;
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137
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138 /**
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139 * Returns the number of characters in this document.
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140 *
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141 * @return the number of characters in this document
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142 */
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143 int getLength();
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144
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145 /**
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146 * Returns this document's complete text.
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147 *
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148 * @return the document's complete text
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149 */
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150 String get();
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151
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152 /**
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153 * Returns this document's text for the specified range.
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154 *
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155 * @param offset the document offset
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156 * @param length the length of the specified range
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157 * @return the document's text for the specified range
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158 * @exception BadLocationException if the range is invalid in this document
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159 */
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160 String get(int offset, int length) throws BadLocationException;
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161
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162 /**
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163 * Replaces the content of the document with the given text.
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164 * Sends a <code>DocumentEvent</code> to all registered <code>IDocumentListener</code>.
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165 * This method is a convenience method for <code>replace(0, getLength(), text)</code>.
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166 *
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167 * @param text the new content of the document
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168 *
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169 * @see DocumentEvent
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170 * @see IDocumentListener
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171 */
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172 void set(String text);
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173
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174 /**
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175 * Substitutes the given text for the specified document range.
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176 * Sends a <code>DocumentEvent</code> to all registered <code>IDocumentListener</code>.
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177 *
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178 * @param offset the document offset
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179 * @param length the length of the specified range
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180 * @param text the substitution text
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181 * @exception BadLocationException if the offset is invalid in this document
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182 *
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183 * @see DocumentEvent
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184 * @see IDocumentListener
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185 */
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186 void replace(int offset, int length, String text) throws BadLocationException;
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187
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188 /**
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189 * Registers the document listener with the document. After registration
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190 * the IDocumentListener is informed about each change of this document.
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191 * If the listener is already registered nothing happens.<p>
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192 * An <code>IDocumentListener</code> may call back to this method
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193 * when being inside a document notification.
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194 *
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195 * @param listener the listener to be registered
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196 */
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197 void addDocumentListener(IDocumentListener listener);
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198
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199 /**
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200 * Removes the listener from the document's list of document listeners.
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201 * If the listener is not registered with the document nothing happens.<p>
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202 * An <code>IDocumentListener</code> may call back to this method
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203 * when being inside a document notification.
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204 *
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205 * @param listener the listener to be removed
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206 */
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207 void removeDocumentListener(IDocumentListener listener);
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208
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209 /**
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210 * Adds the given document listener as one which is notified before
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211 * those document listeners added with <code>addDocumentListener</code>
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212 * are notified. If the given listener is also registered using
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213 * <code>addDocumentListener</code> it will be notified twice.
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214 * If the listener is already registered nothing happens.<p>
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215 *
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216 * This method is not for public use.
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217 *
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218 * @param documentAdapter the listener to be added as pre-notified document listener
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219 *
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220 * @see #removePrenotifiedDocumentListener(IDocumentListener)
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221 */
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222 void addPrenotifiedDocumentListener(IDocumentListener documentAdapter);
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223
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224 /**
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225 * Removes the given document listener from the document's list of
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226 * pre-notified document listeners. If the listener is not registered
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227 * with the document nothing happens. <p>
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228 *
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229 * This method is not for public use.
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230 *
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231 * @param documentAdapter the listener to be removed
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232 *
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233 * @see #addPrenotifiedDocumentListener(IDocumentListener)
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234 */
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235 void removePrenotifiedDocumentListener(IDocumentListener documentAdapter);
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236
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237
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238
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239 /* -------------------------- positions ----------------------------------- */
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240
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241 /**
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242 * Adds a new position category to the document. If the position category
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243 * already exists nothing happens.
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244 *
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245 * @param category the category to be added
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246 */
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247 void addPositionCategory(String category);
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248
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249 /**
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250 * Deletes the position category from the document. All positions
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251 * in this category are thus deleted as well.
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252 *
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253 * @param category the category to be removed
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254 * @exception BadPositionCategoryException if category is undefined in this document
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255 */
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256 void removePositionCategory(String category) throws BadPositionCategoryException;
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257
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258 /**
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259 * Returns all position categories of this document. This
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260 * includes the default position category.
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261 *
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262 * @return the document's position categories
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263 */
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264 String[] getPositionCategories();
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265
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266 /**
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267 * Checks the presence of the specified position category.
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268 *
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269 * @param category the category to check
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270 * @return <code>true</code> if category is defined
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271 */
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272 bool containsPositionCategory(String category);
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273
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274 /**
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275 * Adds the position to the document's default position category.
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276 * This is a convenience method for <code>addPosition(DEFAULT_CATEGORY, position)</code>.
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277 *
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278 * @param position the position to be added
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279 * @exception BadLocationException if position describes an invalid range in this document
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280 */
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281 void addPosition(Position position) throws BadLocationException;
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282
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283 /**
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284 * Removes the given position from the document's default position category.
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285 * This is a convenience method for <code>removePosition(DEFAULT_CATEGORY, position)</code>.
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286 *
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287 * @param position the position to be removed
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288 */
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289 void removePosition(Position position);
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290
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291 /**
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292 * Adds the position to the specified position category of the document.
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293 * Positions may be added multiple times. The order of the category is
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294 * maintained.
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295 * <p>
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296 * <strong>Note:</strong> The position is only updated on each change
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297 * applied to the document if a {@link IPositionUpdater} has been
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298 * registered that handles the given category.
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299 * </p>
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300 *
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301 * @param category the category to which to add
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302 * @param position the position to be added
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303 * @throws BadLocationException if position describes an invalid range in this document
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304 * @throws BadPositionCategoryException if the category is undefined in this document
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305 */
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306 void addPosition(String category, Position position) throws BadLocationException, BadPositionCategoryException;
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307
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308 /**
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309 * Removes the given position from the specified position category.
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310 * If the position is not part of the specified category nothing happens.
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311 * If the position has been added multiple times, only the first occurrence is deleted.
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312 *
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313 * @param category the category from which to delete
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314 * @param position the position to be deleted
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315 * @exception BadPositionCategoryException if category is undefined in this document
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316 */
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317 void removePosition(String category, Position position) throws BadPositionCategoryException;
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318
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319 /**
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320 * Returns all positions of the given position category.
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321 * The positions are ordered according to the category's order.
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322 * Manipulating this list does not affect the document, but manipulating the
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323 * position does affect the document.
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324 *
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325 * @param category the category
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326 * @return the list of all positions
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327 * @exception BadPositionCategoryException if category is undefined in this document
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328 */
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329 Position[] getPositions(String category) throws BadPositionCategoryException;
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330
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331 /**
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332 * Determines whether a position described by the parameters is managed by this document.
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333 *
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334 * @param category the category to check
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335 * @param offset the offset of the position to find
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336 * @param length the length of the position to find
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337 * @return <code>true</code> if position is found
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338 */
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339 bool containsPosition(String category, int offset, int length);
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340
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341 /**
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342 * Computes the index at which a <code>Position</code> with the
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343 * specified offset would be inserted into the given category. As the
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344 * ordering inside a category only depends on the offset, the index must be
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345 * chosen to be the first of all positions with the same offset.
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346 *
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347 * @param category the category in which would be added
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348 * @param offset the position offset to be considered
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349 * @return the index into the category
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350 * @exception BadLocationException if offset is invalid in this document
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351 * @exception BadPositionCategoryException if category is undefined in this document
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352 */
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353 int computeIndexInCategory(String category, int offset) throws BadLocationException, BadPositionCategoryException;
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354
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355 /**
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356 * Appends a new position updater to the document's list of position updaters.
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357 * Position updaters may be added multiple times.<p>
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358 * An <code>IPositionUpdater</code> may call back to this method
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359 * when being inside a document notification.
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360 *
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361 * @param updater the updater to be added
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362 */
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363 void addPositionUpdater(IPositionUpdater updater);
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364
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365 /**
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366 * Removes the position updater from the document's list of position updaters.
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367 * If the position updater has multiple occurrences only the first occurrence is
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368 * removed. If the position updater is not registered with this document, nothing
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369 * happens.<p>
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370 * An <code>IPositionUpdater</code> may call back to this method
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371 * when being inside a document notification.
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372 *
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373 * @param updater the updater to be removed
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374 */
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375 void removePositionUpdater(IPositionUpdater updater);
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376
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377 /**
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378 * Inserts the position updater at the specified index in the document's
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379 * list of position updaters. Positions updaters may be inserted multiple times.<p>
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380 * An <code>IPositionUpdater</code> may call back to this method
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381 * when being inside a document notification.
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382 *
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383 * @param updater the updater to be inserted
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384 * @param index the index in the document's updater list
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385 */
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386 void insertPositionUpdater(IPositionUpdater updater, int index);
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387
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388 /**
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389 * Returns the list of position updaters attached to the document.
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390 *
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391 * @return the list of position updaters
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392 */
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393 IPositionUpdater[] getPositionUpdaters();
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394
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395
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396
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397
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398 /* -------------------------- partitions ---------------------------------- */
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399
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400 /**
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401 * Returns the set of legal content types of document partitions.
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402 * This set can be empty. The set can contain more content types than
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403 * contained by the result of <code>getPartitioning(0, getLength())</code>.
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404 * <p>
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405 * Use {@link IDocumentExtension3#getLegalContentTypes(String)} when the document
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406 * supports multiple partitionings. In that case this method is equivalent to:
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407 * <pre>
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408 * IDocumentExtension3 extension= (IDocumentExtension3) document;
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409 * return extension.getLegalContentTypes(IDocumentExtension3.DEFAULT_PARTITIONING);
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410 * </pre>
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411 *
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412 * @return the set of legal content types
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413 */
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414 String[] getLegalContentTypes();
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415
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416 /**
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417 * Returns the type of the document partition containing the given offset.
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418 * This is a convenience method for <code>getPartition(offset).getType()</code>.
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419 * <p>
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420 * Use {@link IDocumentExtension3#getContentType(String, int, bool)} when
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421 * the document supports multiple partitionings. In that case this method is
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422 * equivalent to:
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423 * <pre>
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424 * IDocumentExtension3 extension= (IDocumentExtension3) document;
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425 * return extension.getContentType(IDocumentExtension3.DEFAULT_PARTITIONING, offset, false);
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426 * </pre>
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427 *
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428 * @param offset the document offset
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429 * @return the partition type
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430 * @exception BadLocationException if offset is invalid in this document
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431 */
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432 String getContentType(int offset) throws BadLocationException;
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433
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434 /**
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435 * Returns the document partition in which the position is located.
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436 * <p>
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437 * Use {@link IDocumentExtension3#getPartition(String, int, bool)} when
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438 * the document supports multiple partitionings. In that case this method is
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439 * equivalent:
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440 * <pre>
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441 * IDocumentExtension3 extension= (IDocumentExtension3) document;
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442 * return extension.getPartition(IDocumentExtension3.DEFAULT_PARTITIONING, offset, false);
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443 * </pre>
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444 *
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445 * @param offset the document offset
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446 * @return a specification of the partition
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447 * @exception BadLocationException if offset is invalid in this document
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448 */
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449 ITypedRegion getPartition(int offset) throws BadLocationException;
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450
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451 /**
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452 * Computes the partitioning of the given document range using the
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453 * document's partitioner.
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454 * <p>
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455 * Use {@link IDocumentExtension3#computePartitioning(String, int, int, bool)} when
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456 * the document supports multiple partitionings. In that case this method is
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457 * equivalent:
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458 * <pre>
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459 * IDocumentExtension3 extension= (IDocumentExtension3) document;
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460 * return extension.computePartitioning(IDocumentExtension3.DEFAULT_PARTITIONING, offset, length, false);
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461 * </pre>
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462 *
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463 * @param offset the document offset at which the range starts
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464 * @param length the length of the document range
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465 * @return a specification of the range's partitioning
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466 * @exception BadLocationException if the range is invalid in this document
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467 */
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468 ITypedRegion[] computePartitioning(int offset, int length) throws BadLocationException;
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469
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470 /**
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471 * Registers the document partitioning listener with the document. After registration
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472 * the document partitioning listener is informed about each partition change
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473 * cause by a document manipulation or by changing the document's partitioner.
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474 * If a document partitioning listener is also
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475 * a document listener, the following notification sequence is guaranteed if a
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476 * document manipulation changes the document partitioning:
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477 * <ul>
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478 * <li>listener.documentAboutToBeChanged(DocumentEvent);
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479 * <li>listener.documentPartitioningChanged();
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480 * <li>listener.documentChanged(DocumentEvent);
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481 * </ul>
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482 * If the listener is already registered nothing happens.<p>
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483 * An <code>IDocumentPartitioningListener</code> may call back to this method
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484 * when being inside a document notification.
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485 *
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486 * @param listener the listener to be added
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487 */
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488 void addDocumentPartitioningListener(IDocumentPartitioningListener listener);
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489
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490 /**
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491 * Removes the listener from this document's list of document partitioning
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492 * listeners. If the listener is not registered with the document nothing
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493 * happens.<p>
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494 * An <code>IDocumentPartitioningListener</code> may call back to this method
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495 * when being inside a document notification.
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496 *
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497 * @param listener the listener to be removed
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498 */
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499 void removeDocumentPartitioningListener(IDocumentPartitioningListener listener);
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500
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501 /**
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502 * Sets this document's partitioner. The caller of this method is responsible for
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503 * disconnecting the document's old partitioner from the document and to
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504 * connect the new partitioner to the document. Informs all document partitioning
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505 * listeners about this change.
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506 * <p>
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507 * Use {@link IDocumentExtension3#setDocumentPartitioner(String, IDocumentPartitioner)} when
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508 * the document supports multiple partitionings. In that case this method is equivalent to:
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509 * <pre>
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510 * IDocumentExtension3 extension= (IDocumentExtension3) document;
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511 * extension.setDocumentPartitioner(IDocumentExtension3.DEFAULT_PARTITIONING, partitioner);
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512 * </pre>
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513 *
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514 * @param partitioner the document's new partitioner
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515 *
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516 * @see IDocumentPartitioningListener
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517 */
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518 void setDocumentPartitioner(IDocumentPartitioner partitioner);
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519
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520 /**
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521 * Returns this document's partitioner.
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522 * <p>
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523 * Use {@link IDocumentExtension3#getDocumentPartitioner(String)} when
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524 * the document supports multiple partitionings. In that case this method is
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525 * equivalent to:
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526 * <pre>
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527 * IDocumentExtension3 extension= (IDocumentExtension3) document;
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528 * return extension.getDocumentPartitioner(IDocumentExtension3.DEFAULT_PARTITIONING);
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529 * </pre>
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530 *
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531 * @return this document's partitioner
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532 */
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533 IDocumentPartitioner getDocumentPartitioner();
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534
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535
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536
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537 /* ---------------------- line information -------------------------------- */
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538
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539 /**
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540 * Returns the length of the given line including the line's delimiter.
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541 *
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542 * @param line the line of interest
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543 * @return the length of the line
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544 * @exception BadLocationException if the line number is invalid in this document
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545 */
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546 int getLineLength(int line) throws BadLocationException;
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547
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548 /**
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549 * Returns the number of the line at which the character of the specified position is located.
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550 * The first line has the line number 0. A new line starts directly after a line
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551 * delimiter. <code>(offset is document length)</code> is a valid argument although there is no
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552 * corresponding character.
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553 *
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554 * @param offset the document offset
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555 * @return the number of the line
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556 * @exception BadLocationException if the offset is invalid in this document
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557 */
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558 int getLineOfOffset(int offset) throws BadLocationException;
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559
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560 /**
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561 * Determines the offset of the first character of the given line.
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562 *
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563 * @param line the line of interest
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564 * @return the document offset
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565 * @exception BadLocationException if the line number is invalid in this document
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566 */
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567 int getLineOffset(int line) throws BadLocationException;
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568
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569 /**
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570 * Returns a description of the specified line. The line is described by its
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571 * offset and its length excluding the line's delimiter.
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572 *
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573 * @param line the line of interest
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574 * @return a line description
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575 * @exception BadLocationException if the line number is invalid in this document
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576 */
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577 IRegion getLineInformation(int line) throws BadLocationException;
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578
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579 /**
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580 * Returns a description of the line at the given offset.
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581 * The description contains the offset and the length of the line
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582 * excluding the line's delimiter.
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583 *
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584 * @param offset the offset whose line should be described
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585 * @return a region describing the line
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586 * @exception BadLocationException if offset is invalid in this document
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587 */
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588 IRegion getLineInformationOfOffset(int offset) throws BadLocationException;
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589
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590 /**
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591 * Returns the number of lines in this document
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592 *
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593 * @return the number of lines in this document
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594 */
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595 int getNumberOfLines();
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596
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597 /**
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598 * Returns the number of lines which are occupied by a given text range.
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599 *
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600 * @param offset the offset of the specified text range
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601 * @param length the length of the specified text range
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602 * @return the number of lines occupied by the specified range
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603 * @exception BadLocationException if specified range is invalid in this tracker
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604 */
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605 int getNumberOfLines(int offset, int length) throws BadLocationException;
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606
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607 /**
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608 * Computes the number of lines in the given text. For a given
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609 * implementer of this interface this method returns the same
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610 * result as <code>set(text); getNumberOfLines()</code>.
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611 *
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612 * @param text the text whose number of lines should be computed
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613 * @return the number of lines in the given text
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parents:
diff changeset
614 */
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615 int computeNumberOfLines(String text);
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diff changeset
616
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diff changeset
617
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618 /* ------------------ line delimiter conversion --------------------------- */
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diff changeset
619
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diff changeset
620 /**
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diff changeset
621 * Returns the document's legal line delimiters.
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parents:
diff changeset
622 *
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diff changeset
623 * @return the document's legal line delimiters
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624 */
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625 String[] getLegalLineDelimiters();
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diff changeset
626
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diff changeset
627 /**
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diff changeset
628 * Returns the line delimiter of that line or <code>null</code> if the
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diff changeset
629 * line is not closed with a line delimiter.
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diff changeset
630 *
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diff changeset
631 * @param line the line of interest
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diff changeset
632 * @return the line's delimiter or <code>null</code> if line does not have a delimiter
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633 * @exception BadLocationException if the line number is invalid in this document
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diff changeset
634 */
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635 String getLineDelimiter(int line) throws BadLocationException;
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parents:
diff changeset
636
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diff changeset
637
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parents:
diff changeset
638 /* ---------------------------- search ------------------------------------ */
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diff changeset
639
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parents:
diff changeset
640 /**
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parents:
diff changeset
641 * Returns the offset of a given search string in the document based on a set of search criteria.
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parents:
diff changeset
642 *
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parents:
diff changeset
643 * @param startOffset document offset at which search starts
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Frank Benoit <benoit@tionex.de>
parents:
diff changeset
644 * @param findString the string to find
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parents:
diff changeset
645 * @param forwardSearch the search direction
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parents:
diff changeset
646 * @param caseSensitive indicates whether lower and upper case should be distinguished
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diff changeset
647 * @param wholeWord indicates whether the findString should be limited by white spaces as
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parents:
diff changeset
648 * defined by Character.isWhiteSpace
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parents:
diff changeset
649 * @return the offset of the first occurrence of findString based on the parameters or -1 if no match is found
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diff changeset
650 * @exception BadLocationException if startOffset is an invalid document offset
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parents:
diff changeset
651 * @deprecated as of 3.0 search is provided by {@link FindReplaceDocumentAdapter}
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parents:
diff changeset
652 */
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diff changeset
653 int search(int startOffset, String findString, bool forwardSearch, bool caseSensitive, bool wholeWord) throws BadLocationException;
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diff changeset
654 }