Mercurial > projects > dwt-addons
annotate dwtx/jface/internal/text/html/HTMLTextPresenter.d @ 159:7926b636c282
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| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Wed, 27 Aug 2008 01:57:58 +0200 |
| parents | 25f1f92fa3df |
| children | 1a5b8f8129df |
| rev | line source |
|---|---|
| 129 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2008 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 module dwtx.jface.internal.text.html.HTMLTextPresenter; | |
| 14 | |
| 131 | 15 import dwtx.jface.internal.text.html.HTML2TextReader; // packageimport |
| 16 import dwtx.jface.internal.text.html.HTMLPrinter; // packageimport | |
| 17 import dwtx.jface.internal.text.html.BrowserInformationControl; // packageimport | |
| 18 import dwtx.jface.internal.text.html.SubstitutionTextReader; // packageimport | |
| 19 import dwtx.jface.internal.text.html.BrowserInput; // packageimport | |
| 20 import dwtx.jface.internal.text.html.SingleCharReader; // packageimport | |
| 21 import dwtx.jface.internal.text.html.BrowserInformationControlInput; // packageimport | |
| 22 import dwtx.jface.internal.text.html.HTMLMessages; // packageimport | |
| 23 | |
| 24 | |
| 129 | 25 import dwt.dwthelper.utils; |
|
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26 import dwtx.dwtxhelper.Collection; |
| 129 | 27 |
| 28 import dwt.custom.StyleRange; | |
| 29 import dwt.graphics.Drawable; | |
| 30 import dwt.graphics.GC; | |
| 31 import dwt.widgets.Display; | |
| 32 import dwtx.jface.internal.text.link.contentassist.LineBreakingReader; | |
| 33 import dwtx.jface.text.DefaultInformationControl; | |
| 34 import dwtx.jface.text.Region; | |
| 35 import dwtx.jface.text.TextPresentation; | |
| 36 | |
| 37 | |
| 38 /** | |
| 39 * <p> | |
| 40 * Moved into this package from <code>dwtx.jface.internal.text.revisions</code>.</p> | |
| 41 */ | |
| 158 | 42 public class HTMLTextPresenter : DefaultInformationControl_IInformationPresenter, DefaultInformationControl_IInformationPresenterExtension { |
| 129 | 43 |
| 159 | 44 private static String LINE_DELIM_; |
| 45 private static String LINE_DELIM() { | |
| 46 if( LINE_DELIM_ is null ){ | |
| 47 LINE_DELIM_ = System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$ | |
| 48 } | |
| 49 return LINE_DELIM_; | |
| 50 } | |
| 129 | 51 |
| 52 private int fCounter; | |
| 53 private bool fEnforceUpperLineLimit; | |
| 54 | |
|
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55 public this(bool enforceUpperLineLimit) { |
| 129 | 56 super(); |
| 57 fEnforceUpperLineLimit= enforceUpperLineLimit; | |
| 58 } | |
| 59 | |
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60 public this() { |
| 129 | 61 this(true); |
| 62 } | |
| 63 | |
| 64 protected Reader createReader(String hoverInfo, TextPresentation presentation) { | |
| 65 return new HTML2TextReader(new StringReader(hoverInfo), presentation); | |
| 66 } | |
| 67 | |
| 68 protected void adaptTextPresentation(TextPresentation presentation, int offset, int insertLength) { | |
| 69 | |
| 70 int yoursStart= offset; | |
| 71 int yoursEnd= offset + insertLength -1; | |
| 72 yoursEnd= Math.max(yoursStart, yoursEnd); | |
| 73 | |
| 74 Iterator e= presentation.getAllStyleRangeIterator(); | |
| 75 while (e.hasNext()) { | |
| 76 | |
| 134 | 77 StyleRange range= cast(StyleRange) e.next(); |
| 129 | 78 |
| 79 int myStart= range.start; | |
| 80 int myEnd= range.start + range.length -1; | |
| 81 myEnd= Math.max(myStart, myEnd); | |
| 82 | |
| 83 if (myEnd < yoursStart) | |
| 84 continue; | |
| 85 | |
| 86 if (myStart < yoursStart) | |
| 87 range.length += insertLength; | |
| 88 else | |
| 89 range.start += insertLength; | |
| 90 } | |
| 91 } | |
| 92 | |
| 93 private void append(StringBuffer buffer, String string, TextPresentation presentation) { | |
| 94 | |
| 95 int length= string.length(); | |
| 96 buffer.append(string); | |
| 97 | |
| 98 if (presentation !is null) | |
| 99 adaptTextPresentation(presentation, fCounter, length); | |
| 100 | |
| 101 fCounter += length; | |
| 102 } | |
| 103 | |
| 104 private String getIndent(String line) { | |
| 105 int length= line.length(); | |
| 106 | |
| 107 int i= 0; | |
| 108 while (i < length && Character.isWhitespace(line.charAt(i))) ++i; | |
| 109 | |
| 110 return (i is length ? line : line.substring(0, i)) + " "; //$NON-NLS-1$ | |
| 111 } | |
| 112 | |
| 113 /** | |
| 114 * {@inheritDoc} | |
| 158 | 115 * |
| 129 | 116 * @see dwtx.jface.text.DefaultInformationControl.IInformationPresenter#updatePresentation(dwt.widgets.Display, java.lang.String, dwtx.jface.text.TextPresentation, int, int) |
| 117 * @deprecated | |
| 118 */ | |
| 119 public String updatePresentation(Display display, String hoverInfo, TextPresentation presentation, int maxWidth, int maxHeight) { | |
| 134 | 120 return updatePresentation(cast(Drawable)display, hoverInfo, presentation, maxWidth, maxHeight); |
| 129 | 121 } |
| 122 | |
| 123 /* | |
| 124 * @see IHoverInformationPresenterExtension#updatePresentation(Drawable drawable, String, TextPresentation, int, int) | |
| 125 * @since 3.2 | |
| 126 */ | |
| 127 public String updatePresentation(Drawable drawable, String hoverInfo, TextPresentation presentation, int maxWidth, int maxHeight) { | |
| 128 | |
| 129 if (hoverInfo is null) | |
| 130 return null; | |
| 131 | |
| 132 GC gc= new GC(drawable); | |
| 133 try { | |
| 134 | |
| 135 StringBuffer buffer= new StringBuffer(); | |
| 136 int maxNumberOfLines= Math.round(maxHeight / gc.getFontMetrics().getHeight()); | |
| 137 | |
| 138 fCounter= 0; | |
| 139 LineBreakingReader reader= new LineBreakingReader(createReader(hoverInfo, presentation), gc, maxWidth); | |
| 140 | |
| 141 bool lastLineFormatted= false; | |
| 142 String lastLineIndent= null; | |
| 143 | |
| 144 String line=reader.readLine(); | |
| 145 bool lineFormatted= reader.isFormattedLine(); | |
| 146 bool firstLineProcessed= false; | |
| 147 | |
| 148 while (line !is null) { | |
| 149 | |
| 150 if (fEnforceUpperLineLimit && maxNumberOfLines <= 0) | |
| 151 break; | |
| 152 | |
| 153 if (firstLineProcessed) { | |
| 154 if (!lastLineFormatted) | |
| 155 append(buffer, LINE_DELIM, null); | |
| 156 else { | |
| 157 append(buffer, LINE_DELIM, presentation); | |
| 158 if (lastLineIndent !is null) | |
| 159 append(buffer, lastLineIndent, presentation); | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 append(buffer, line, null); | |
| 164 firstLineProcessed= true; | |
| 165 | |
| 166 lastLineFormatted= lineFormatted; | |
| 167 if (!lineFormatted) | |
| 168 lastLineIndent= null; | |
| 169 else if (lastLineIndent is null) | |
| 170 lastLineIndent= getIndent(line); | |
| 171 | |
| 172 line= reader.readLine(); | |
| 173 lineFormatted= reader.isFormattedLine(); | |
| 174 | |
| 175 maxNumberOfLines--; | |
| 176 } | |
| 177 | |
| 178 if (line !is null) { | |
| 179 append(buffer, LINE_DELIM, lineFormatted ? presentation : null); | |
| 180 append(buffer, HTMLMessages.getString("HTMLTextPresenter.ellipse"), presentation); //$NON-NLS-1$ | |
| 181 } | |
| 182 | |
| 183 return trim(buffer, presentation); | |
| 184 | |
| 185 } catch (IOException e) { | |
| 186 | |
| 187 // ignore TODO do something else? | |
| 188 return null; | |
| 189 | |
| 190 } finally { | |
| 191 gc.dispose(); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 private String trim(StringBuffer buffer, TextPresentation presentation) { | |
| 196 | |
| 197 int length= buffer.length(); | |
| 198 | |
| 199 int end= length -1; | |
| 200 while (end >= 0 && Character.isWhitespace(buffer.charAt(end))) | |
| 201 -- end; | |
| 202 | |
| 203 if (end is -1) | |
| 204 return ""; //$NON-NLS-1$ | |
| 205 | |
| 206 if (end < length -1) | |
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parents:
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diff
changeset
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207 buffer.delete_(end + 1, length); |
| 129 | 208 else |
| 209 end= length; | |
| 210 | |
| 211 int start= 0; | |
| 212 while (start < end && Character.isWhitespace(buffer.charAt(start))) | |
| 213 ++ start; | |
| 214 | |
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parents:
134
diff
changeset
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215 buffer.delete_(0, start); |
| 129 | 216 presentation.setResultWindow(new Region(start, buffer.length())); |
| 217 return buffer.toString(); | |
| 218 } | |
| 219 } | |
| 220 |