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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 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 module dwtx.jface.text.link.LinkedPosition;
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14
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131
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15 import dwtx.jface.text.link.LinkedModeModel; // packageimport
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16 import dwtx.jface.text.link.ILinkedModeListener; // packageimport
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17 import dwtx.jface.text.link.TabStopIterator; // packageimport
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18 import dwtx.jface.text.link.LinkedModeUI; // packageimport
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19 import dwtx.jface.text.link.InclusivePositionUpdater; // packageimport
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20 import dwtx.jface.text.link.LinkedPositionGroup; // packageimport
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21 import dwtx.jface.text.link.LinkedModeManager; // packageimport
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22 import dwtx.jface.text.link.LinkedPositionAnnotations; // packageimport
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23 import dwtx.jface.text.link.ProposalPosition; // packageimport
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24
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25
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129
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26 import dwt.dwthelper.utils;
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27
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28
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29 import dwtx.core.runtime.Assert;
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30 import dwtx.jface.text.BadLocationException;
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31 import dwtx.jface.text.DocumentEvent;
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32 import dwtx.jface.text.IDocument;
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33 import dwtx.jface.text.Position;
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34
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35 /**
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36 * A <code>Position</code> on a document that knows which document it is
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37 * registered with and has a sequence number for tab stops.
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38 * <p>
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39 * Clients may extend this class.
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40 * </p>
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41 * @since 3.0
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42 */
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43 public class LinkedPosition : Position {
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44
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45 /** The document this position belongs to. */
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46 private IDocument fDocument;
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47 private int fSequenceNumber;
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48
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49 /**
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50 * Creates a new instance.
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51 *
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52 * @param document the document
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53 * @param offset the offset of the position
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54 * @param length the length of the position
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55 * @param sequence the iteration sequence rank
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56 */
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57 public LinkedPosition(IDocument document, int offset, int length, int sequence) {
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58 super(offset, length);
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59 Assert.isNotNull(document);
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60 fDocument= document;
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61 fSequenceNumber= sequence;
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62 }
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63
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64 /**
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65 * Creates a new instance. Equivalent to calling
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66 * <code>LinkedPosition(document, offset, length, LinkedPositionGroup.NO_STOP)</code>
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67 *
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68 * @param document the document
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69 * @param offset the offset of the position
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70 * @param length the length of the position
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71 */
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72 public LinkedPosition(IDocument document, int offset, int length) {
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73 this(document, offset, length, LinkedPositionGroup.NO_STOP);
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74 }
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75
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76 /**
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77 * @return Returns the document.
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78 */
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79 public IDocument getDocument() {
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80 return fDocument;
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81 }
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82
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83 /*
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84 * @see dwtx.jface.text.Position#equals(java.lang.Object)
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85 */
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86 public bool equals(Object other) {
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87 if (other instanceof LinkedPosition) {
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88 LinkedPosition p= (LinkedPosition) other;
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89 return p.offset is offset && p.length is length && p.fDocument is fDocument;
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90 }
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91 return false;
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92 }
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93
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94 /**
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95 * Returns whether this position overlaps with <code>position</code>.
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96 *
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97 * @param position the position to check.
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98 * @return <code>true</code> if this position overlaps with
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99 * <code>position</code>,<code>false</code> otherwise
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100 */
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101 public bool overlapsWith(LinkedPosition position) {
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102 return position.getDocument() is fDocument && overlapsWith(position.getOffset(), position.getLength());
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103 }
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104
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105 /**
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106 * Returns whether this position includes <code>event</code>.
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107 *
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108 * @param event the event to check.
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109 * @return <code>true</code> if this position includes <code>event</code>,
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110 * <code>false</code> otherwise
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111 */
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112 public bool includes(DocumentEvent event) {
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113 return includes(event.getDocument(), event.getOffset(), event.getLength());
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114 }
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115
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116 /**
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117 * Returns whether this position includes <code>position</code>.
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118 *
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119 * @param position the position to check.
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120 * @return <code>true</code> if this position includes
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121 * <code>position</code>,<code>false</code> otherwise
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122 */
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123 public bool includes(LinkedPosition position) {
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124 return includes(position.getDocument(), position.getOffset(), position.getLength());
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125 }
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126
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127 /**
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128 * Overrides {@link Position#includes(int)}so every offset is considered
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129 * included that lies in between the first and last offset of this position,
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130 * and offsets that are right at the end of the position.
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131 *
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132 * @param pOffset the offset to check
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133 * @return <code>true</code> if <code>pOffset</code> is in
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134 * <code>[offset, offset + length]</code>
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135 */
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136 public bool includes(int pOffset) {
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137 return this.offset <= pOffset && pOffset <= this.offset + this.length;
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138 }
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139
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140 /**
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141 * Returns whether this position includes the range given by
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142 * <code>offset</code> and <code>length</code>. A range is included by
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143 * a <code>LinkedPosition</code> if {@link #includes(int) includes(offset)}
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144 * returns true for every offset in the range, including the borders of the
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145 * range.
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146 *
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147 * @param doc the document that the given range refers to, may be <code>null</code>
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148 * @param off the offset of the range, referring to <code>document</code>
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149 * @param len the length of the range
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150 * @return <code>true</code> if <code>doc</code> is the same document as
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151 * this position refers to, and if the entire range is included in
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152 * this position
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153 */
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154 protected bool includes(IDocument doc, int off, int len) {
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155 return doc is fDocument && off >= offset && len + off <= offset + length;
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156
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157 }
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158
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159 /**
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160 * Returns the content of this position on the referenced document.
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161 *
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162 * @return the content of the document at this position
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163 * @throws BadLocationException if the position is not valid
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164 */
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165 public String getContent() throws BadLocationException {
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166 return fDocument.get(offset, length);
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167 }
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168
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169 /**
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170 * Returns the sequence number of this position.
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171 *
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172 * @return the sequence number of this position
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173 */
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174 public int getSequenceNumber() {
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175 return fSequenceNumber;
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176 }
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177
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178 /**
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179 * Sets the sequence number of this position.
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180 *
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181 * @param sequence the new sequence number
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182 */
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183 public void setSequenceNumber(int sequence) {
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184 fSequenceNumber= sequence;
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185 }
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186
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187 /*
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188 * @see dwtx.jface.text.Position#hashCode()
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189 */
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190 public int hashCode() {
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191 return fDocument.hashCode() | super.hashCode() | fSequenceNumber;
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192 }
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193 }
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