Mercurial > projects > dwt-addons
annotate dwtx/jface/internal/text/html/HTMLTextPresenter.d @ 158:25f1f92fa3df
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| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Tue, 26 Aug 2008 02:46:34 +0200 |
| parents | f70d9508c95c |
| children | 7926b636c282 |
| 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 |
| 147 | 44 private static const String LINE_DELIM= System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$ |
| 129 | 45 |
| 46 private int fCounter; | |
| 47 private bool fEnforceUpperLineLimit; | |
| 48 | |
|
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49 public this(bool enforceUpperLineLimit) { |
| 129 | 50 super(); |
| 51 fEnforceUpperLineLimit= enforceUpperLineLimit; | |
| 52 } | |
| 53 | |
|
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54 public this() { |
| 129 | 55 this(true); |
| 56 } | |
| 57 | |
| 58 protected Reader createReader(String hoverInfo, TextPresentation presentation) { | |
| 59 return new HTML2TextReader(new StringReader(hoverInfo), presentation); | |
| 60 } | |
| 61 | |
| 62 protected void adaptTextPresentation(TextPresentation presentation, int offset, int insertLength) { | |
| 63 | |
| 64 int yoursStart= offset; | |
| 65 int yoursEnd= offset + insertLength -1; | |
| 66 yoursEnd= Math.max(yoursStart, yoursEnd); | |
| 67 | |
| 68 Iterator e= presentation.getAllStyleRangeIterator(); | |
| 69 while (e.hasNext()) { | |
| 70 | |
| 134 | 71 StyleRange range= cast(StyleRange) e.next(); |
| 129 | 72 |
| 73 int myStart= range.start; | |
| 74 int myEnd= range.start + range.length -1; | |
| 75 myEnd= Math.max(myStart, myEnd); | |
| 76 | |
| 77 if (myEnd < yoursStart) | |
| 78 continue; | |
| 79 | |
| 80 if (myStart < yoursStart) | |
| 81 range.length += insertLength; | |
| 82 else | |
| 83 range.start += insertLength; | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 private void append(StringBuffer buffer, String string, TextPresentation presentation) { | |
| 88 | |
| 89 int length= string.length(); | |
| 90 buffer.append(string); | |
| 91 | |
| 92 if (presentation !is null) | |
| 93 adaptTextPresentation(presentation, fCounter, length); | |
| 94 | |
| 95 fCounter += length; | |
| 96 } | |
| 97 | |
| 98 private String getIndent(String line) { | |
| 99 int length= line.length(); | |
| 100 | |
| 101 int i= 0; | |
| 102 while (i < length && Character.isWhitespace(line.charAt(i))) ++i; | |
| 103 | |
| 104 return (i is length ? line : line.substring(0, i)) + " "; //$NON-NLS-1$ | |
| 105 } | |
| 106 | |
| 107 /** | |
| 108 * {@inheritDoc} | |
| 158 | 109 * |
| 129 | 110 * @see dwtx.jface.text.DefaultInformationControl.IInformationPresenter#updatePresentation(dwt.widgets.Display, java.lang.String, dwtx.jface.text.TextPresentation, int, int) |
| 111 * @deprecated | |
| 112 */ | |
| 113 public String updatePresentation(Display display, String hoverInfo, TextPresentation presentation, int maxWidth, int maxHeight) { | |
| 134 | 114 return updatePresentation(cast(Drawable)display, hoverInfo, presentation, maxWidth, maxHeight); |
| 129 | 115 } |
| 116 | |
| 117 /* | |
| 118 * @see IHoverInformationPresenterExtension#updatePresentation(Drawable drawable, String, TextPresentation, int, int) | |
| 119 * @since 3.2 | |
| 120 */ | |
| 121 public String updatePresentation(Drawable drawable, String hoverInfo, TextPresentation presentation, int maxWidth, int maxHeight) { | |
| 122 | |
| 123 if (hoverInfo is null) | |
| 124 return null; | |
| 125 | |
| 126 GC gc= new GC(drawable); | |
| 127 try { | |
| 128 | |
| 129 StringBuffer buffer= new StringBuffer(); | |
| 130 int maxNumberOfLines= Math.round(maxHeight / gc.getFontMetrics().getHeight()); | |
| 131 | |
| 132 fCounter= 0; | |
| 133 LineBreakingReader reader= new LineBreakingReader(createReader(hoverInfo, presentation), gc, maxWidth); | |
| 134 | |
| 135 bool lastLineFormatted= false; | |
| 136 String lastLineIndent= null; | |
| 137 | |
| 138 String line=reader.readLine(); | |
| 139 bool lineFormatted= reader.isFormattedLine(); | |
| 140 bool firstLineProcessed= false; | |
| 141 | |
| 142 while (line !is null) { | |
| 143 | |
| 144 if (fEnforceUpperLineLimit && maxNumberOfLines <= 0) | |
| 145 break; | |
| 146 | |
| 147 if (firstLineProcessed) { | |
| 148 if (!lastLineFormatted) | |
| 149 append(buffer, LINE_DELIM, null); | |
| 150 else { | |
| 151 append(buffer, LINE_DELIM, presentation); | |
| 152 if (lastLineIndent !is null) | |
| 153 append(buffer, lastLineIndent, presentation); | |
| 154 } | |
| 155 } | |
| 156 | |
| 157 append(buffer, line, null); | |
| 158 firstLineProcessed= true; | |
| 159 | |
| 160 lastLineFormatted= lineFormatted; | |
| 161 if (!lineFormatted) | |
| 162 lastLineIndent= null; | |
| 163 else if (lastLineIndent is null) | |
| 164 lastLineIndent= getIndent(line); | |
| 165 | |
| 166 line= reader.readLine(); | |
| 167 lineFormatted= reader.isFormattedLine(); | |
| 168 | |
| 169 maxNumberOfLines--; | |
| 170 } | |
| 171 | |
| 172 if (line !is null) { | |
| 173 append(buffer, LINE_DELIM, lineFormatted ? presentation : null); | |
| 174 append(buffer, HTMLMessages.getString("HTMLTextPresenter.ellipse"), presentation); //$NON-NLS-1$ | |
| 175 } | |
| 176 | |
| 177 return trim(buffer, presentation); | |
| 178 | |
| 179 } catch (IOException e) { | |
| 180 | |
| 181 // ignore TODO do something else? | |
| 182 return null; | |
| 183 | |
| 184 } finally { | |
| 185 gc.dispose(); | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 private String trim(StringBuffer buffer, TextPresentation presentation) { | |
| 190 | |
| 191 int length= buffer.length(); | |
| 192 | |
| 193 int end= length -1; | |
| 194 while (end >= 0 && Character.isWhitespace(buffer.charAt(end))) | |
| 195 -- end; | |
| 196 | |
| 197 if (end is -1) | |
| 198 return ""; //$NON-NLS-1$ | |
| 199 | |
| 200 if (end < length -1) | |
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201 buffer.delete_(end + 1, length); |
| 129 | 202 else |
| 203 end= length; | |
| 204 | |
| 205 int start= 0; | |
| 206 while (start < end && Character.isWhitespace(buffer.charAt(start))) | |
| 207 ++ start; | |
| 208 | |
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parents:
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diff
changeset
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209 buffer.delete_(0, start); |
| 129 | 210 presentation.setResultWindow(new Region(start, buffer.length())); |
| 211 return buffer.toString(); | |
| 212 } | |
| 213 } | |
| 214 |