Mercurial > projects > dwt-addons
annotate dwtx/jface/text/rules/DefaultDamagerRepairer.d @ 151:eb21d3dfc767
fix module statement
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 24 Aug 2008 23:55:45 +0200 |
| parents | b6bad70d540a |
| children | 1a5b8f8129df |
| rev | line source |
|---|---|
| 129 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2006 IBM Corporation and others. | |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 10 * Port to the D programming language: | |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 12 *******************************************************************************/ | |
| 13 | |
| 131 | 14 |
| 151 | 15 module dwtx.jface.text.rules.DefaultDamagerRepairer; |
| 16 | |
| 131 | 17 import dwtx.jface.text.rules.FastPartitioner; // packageimport |
| 18 import dwtx.jface.text.rules.ITokenScanner; // packageimport | |
| 19 import dwtx.jface.text.rules.Token; // packageimport | |
| 20 import dwtx.jface.text.rules.RuleBasedScanner; // packageimport | |
| 21 import dwtx.jface.text.rules.EndOfLineRule; // packageimport | |
| 22 import dwtx.jface.text.rules.WordRule; // packageimport | |
| 23 import dwtx.jface.text.rules.WhitespaceRule; // packageimport | |
| 24 import dwtx.jface.text.rules.WordPatternRule; // packageimport | |
| 25 import dwtx.jface.text.rules.IPredicateRule; // packageimport | |
| 26 import dwtx.jface.text.rules.DefaultPartitioner; // packageimport | |
| 27 import dwtx.jface.text.rules.NumberRule; // packageimport | |
| 28 import dwtx.jface.text.rules.SingleLineRule; // packageimport | |
| 29 import dwtx.jface.text.rules.PatternRule; // packageimport | |
| 30 import dwtx.jface.text.rules.IWordDetector; // packageimport | |
| 31 import dwtx.jface.text.rules.RuleBasedDamagerRepairer; // packageimport | |
| 32 import dwtx.jface.text.rules.ICharacterScanner; // packageimport | |
| 33 import dwtx.jface.text.rules.IRule; // packageimport | |
| 34 import dwtx.jface.text.rules.IToken; // packageimport | |
| 35 import dwtx.jface.text.rules.IPartitionTokenScanner; // packageimport | |
| 36 import dwtx.jface.text.rules.MultiLineRule; // packageimport | |
| 37 import dwtx.jface.text.rules.RuleBasedPartitioner; // packageimport | |
| 38 import dwtx.jface.text.rules.RuleBasedPartitionScanner; // packageimport | |
| 39 import dwtx.jface.text.rules.BufferedRuleBasedScanner; // packageimport | |
| 40 import dwtx.jface.text.rules.IWhitespaceDetector; // packageimport | |
| 41 | |
| 129 | 42 import dwt.dwthelper.utils; |
| 43 | |
| 44 | |
| 45 | |
| 46 | |
| 47 | |
| 48 import dwt.DWT; | |
| 49 import dwt.custom.StyleRange; | |
| 50 import dwtx.core.runtime.Assert; | |
| 51 import dwtx.jface.text.BadLocationException; | |
| 52 import dwtx.jface.text.DocumentEvent; | |
| 53 import dwtx.jface.text.IDocument; | |
| 54 import dwtx.jface.text.IRegion; | |
| 55 import dwtx.jface.text.ITypedRegion; | |
| 56 import dwtx.jface.text.Region; | |
| 57 import dwtx.jface.text.TextAttribute; | |
| 58 import dwtx.jface.text.TextPresentation; | |
| 59 import dwtx.jface.text.presentation.IPresentationDamager; | |
| 60 import dwtx.jface.text.presentation.IPresentationRepairer; | |
| 61 | |
| 62 | |
| 63 /** | |
| 64 * A standard implementation of a syntax driven presentation damager | |
| 65 * and presentation repairer. It uses a token scanner to scan | |
| 66 * the document and to determine its damage and new text presentation. | |
| 67 * The tokens returned by the scanner are supposed to return text attributes | |
| 68 * as their data. | |
| 69 * | |
| 70 * @see ITokenScanner | |
| 71 * @since 2.0 | |
| 72 */ | |
| 73 public class DefaultDamagerRepairer : IPresentationDamager, IPresentationRepairer { | |
| 74 | |
| 75 | |
| 76 /** The document this object works on */ | |
| 77 protected IDocument fDocument; | |
| 78 /** The scanner it uses */ | |
| 79 protected ITokenScanner fScanner; | |
| 80 /** The default text attribute if non is returned as data by the current token */ | |
| 81 protected TextAttribute fDefaultTextAttribute; | |
| 82 | |
| 83 /** | |
| 84 * Creates a damager/repairer that uses the given scanner and returns the given default | |
| 85 * text attribute if the current token does not carry a text attribute. | |
| 86 * | |
| 87 * @param scanner the token scanner to be used | |
| 88 * @param defaultTextAttribute the text attribute to be returned if non is specified by the current token, | |
| 89 * may not be <code>null</code> | |
| 90 * | |
| 91 * @deprecated use DefaultDamagerRepairer(ITokenScanner) instead | |
| 92 */ | |
|
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93 public this(ITokenScanner scanner, TextAttribute defaultTextAttribute) { |
| 129 | 94 |
| 95 Assert.isNotNull(defaultTextAttribute); | |
| 96 | |
| 97 fScanner= scanner; | |
| 98 fDefaultTextAttribute= defaultTextAttribute; | |
| 99 } | |
| 100 | |
| 101 /** | |
| 102 * Creates a damager/repairer that uses the given scanner. The scanner may not be <code>null</code> | |
| 103 * and is assumed to return only token that carry text attributes. | |
| 104 * | |
| 105 * @param scanner the token scanner to be used, may not be <code>null</code> | |
| 106 */ | |
|
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changeset
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107 public this(ITokenScanner scanner) { |
| 129 | 108 |
| 109 Assert.isNotNull(scanner); | |
| 110 | |
| 111 fScanner= scanner; | |
| 112 fDefaultTextAttribute= new TextAttribute(null); | |
| 113 } | |
| 114 | |
| 115 /* | |
| 116 * @see IPresentationDamager#setDocument(IDocument) | |
| 117 * @see IPresentationRepairer#setDocument(IDocument) | |
| 118 */ | |
| 119 public void setDocument(IDocument document) { | |
| 120 fDocument= document; | |
| 121 } | |
| 122 | |
| 123 | |
| 124 //---- IPresentationDamager | |
| 125 | |
| 126 /** | |
| 127 * Returns the end offset of the line that contains the specified offset or | |
| 128 * if the offset is inside a line delimiter, the end offset of the next line. | |
| 129 * | |
| 130 * @param offset the offset whose line end offset must be computed | |
| 131 * @return the line end offset for the given offset | |
| 132 * @exception BadLocationException if offset is invalid in the current document | |
| 133 */ | |
|
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134 protected int endOfLineOf(int offset) { |
| 129 | 135 |
| 136 IRegion info= fDocument.getLineInformationOfOffset(offset); | |
| 137 if (offset <= info.getOffset() + info.getLength()) | |
| 138 return info.getOffset() + info.getLength(); | |
| 139 | |
| 140 int line= fDocument.getLineOfOffset(offset); | |
| 141 try { | |
| 142 info= fDocument.getLineInformation(line + 1); | |
| 143 return info.getOffset() + info.getLength(); | |
| 144 } catch (BadLocationException x) { | |
| 145 return fDocument.getLength(); | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 /* | |
| 150 * @see IPresentationDamager#getDamageRegion(ITypedRegion, DocumentEvent, bool) | |
| 151 */ | |
| 152 public IRegion getDamageRegion(ITypedRegion partition, DocumentEvent e, bool documentPartitioningChanged) { | |
| 153 | |
| 154 if (!documentPartitioningChanged) { | |
| 155 try { | |
| 156 | |
| 157 IRegion info= fDocument.getLineInformationOfOffset(e.getOffset()); | |
| 158 int start= Math.max(partition.getOffset(), info.getOffset()); | |
| 159 | |
| 160 int end= e.getOffset() + (e.getText() is null ? e.getLength() : e.getText().length()); | |
| 161 | |
| 162 if (info.getOffset() <= end && end <= info.getOffset() + info.getLength()) { | |
| 163 // optimize the case of the same line | |
| 164 end= info.getOffset() + info.getLength(); | |
| 165 } else | |
| 166 end= endOfLineOf(end); | |
| 167 | |
| 168 end= Math.min(partition.getOffset() + partition.getLength(), end); | |
| 169 return new Region(start, end - start); | |
| 170 | |
| 171 } catch (BadLocationException x) { | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 return partition; | |
| 176 } | |
| 177 | |
| 178 //---- IPresentationRepairer | |
| 179 | |
| 180 /* | |
| 181 * @see IPresentationRepairer#createPresentation(TextPresentation, ITypedRegion) | |
| 182 */ | |
| 183 public void createPresentation(TextPresentation presentation, ITypedRegion region) { | |
| 184 | |
| 185 if (fScanner is null) { | |
| 186 // will be removed if deprecated constructor will be removed | |
| 187 addRange(presentation, region.getOffset(), region.getLength(), fDefaultTextAttribute); | |
| 188 return; | |
| 189 } | |
| 190 | |
| 191 int lastStart= region.getOffset(); | |
| 192 int length= 0; | |
| 193 bool firstToken= true; | |
| 194 IToken lastToken= Token.UNDEFINED; | |
| 195 TextAttribute lastAttribute= getTokenTextAttribute(lastToken); | |
| 196 | |
| 197 fScanner.setRange(fDocument, lastStart, region.getLength()); | |
| 198 | |
| 199 while (true) { | |
| 200 IToken token= fScanner.nextToken(); | |
| 201 if (token.isEOF()) | |
| 202 break; | |
| 203 | |
| 204 TextAttribute attribute= getTokenTextAttribute(token); | |
| 205 if (lastAttribute !is null && lastAttribute.equals(attribute)) { | |
| 206 length += fScanner.getTokenLength(); | |
| 207 firstToken= false; | |
| 208 } else { | |
| 209 if (!firstToken) | |
| 210 addRange(presentation, lastStart, length, lastAttribute); | |
| 211 firstToken= false; | |
| 212 lastToken= token; | |
| 213 lastAttribute= attribute; | |
| 214 lastStart= fScanner.getTokenOffset(); | |
| 215 length= fScanner.getTokenLength(); | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 addRange(presentation, lastStart, length, lastAttribute); | |
| 220 } | |
| 221 | |
| 222 /** | |
| 223 * Returns a text attribute encoded in the given token. If the token's | |
| 224 * data is not <code>null</code> and a text attribute it is assumed that | |
| 225 * it is the encoded text attribute. It returns the default text attribute | |
| 226 * if there is no encoded text attribute found. | |
| 227 * | |
| 228 * @param token the token whose text attribute is to be determined | |
| 229 * @return the token's text attribute | |
| 230 */ | |
| 231 protected TextAttribute getTokenTextAttribute(IToken token) { | |
| 232 Object data= token.getData(); | |
| 138 | 233 if ( cast(TextAttribute)data ) |
| 134 | 234 return cast(TextAttribute) data; |
| 129 | 235 return fDefaultTextAttribute; |
| 236 } | |
| 237 | |
| 238 /** | |
| 239 * Adds style information to the given text presentation. | |
| 240 * | |
| 241 * @param presentation the text presentation to be extended | |
| 242 * @param offset the offset of the range to be styled | |
| 243 * @param length the length of the range to be styled | |
| 244 * @param attr the attribute describing the style of the range to be styled | |
| 245 */ | |
| 246 protected void addRange(TextPresentation presentation, int offset, int length, TextAttribute attr) { | |
| 247 if (attr !is null) { | |
| 248 int style= attr.getStyle(); | |
| 249 int fontStyle= style & (DWT.ITALIC | DWT.BOLD | DWT.NORMAL); | |
| 250 StyleRange styleRange= new StyleRange(offset, length, attr.getForeground(), attr.getBackground(), fontStyle); | |
| 251 styleRange.strikeout= (style & TextAttribute.STRIKETHROUGH) !is 0; | |
| 252 styleRange.underline= (style & TextAttribute.UNDERLINE) !is 0; | |
| 253 styleRange.font= attr.getFont(); | |
| 254 presentation.addStyleRange(styleRange); | |
| 255 } | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 |