Mercurial > projects > dwt-addons
annotate dwtx/jface/internal/text/html/SubstitutionTextReader.d @ 139:93a6ec48fd28
Regexp throws removal in interfaces
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 24 Aug 2008 02:31:41 +0200 |
| parents | 6dcb0baaa031 |
| children | 25f1f92fa3df |
| 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 module dwtx.jface.internal.text.html.SubstitutionTextReader; | |
| 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.HTMLTextPresenter; // 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; |
| 26 | |
| 27 import java.io.IOException; | |
| 28 import java.io.Reader; | |
| 29 | |
| 30 | |
| 31 /** | |
| 32 * Reads the text contents from a reader and computes for each character | |
| 33 * a potential substitution. The substitution may eat more characters than | |
| 34 * only the one passed into the computation routine. | |
| 35 * <p> | |
| 36 * Moved into this package from <code>dwtx.jface.internal.text.revisions</code>.</p> | |
| 37 */ | |
| 38 public abstract class SubstitutionTextReader : SingleCharReader { | |
| 39 | |
| 40 protected static final String LINE_DELIM= System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$ | |
| 41 | |
| 42 private Reader fReader; | |
| 43 protected bool fWasWhiteSpace; | |
| 44 private int fCharAfterWhiteSpace; | |
| 45 | |
| 46 /** | |
| 47 * Tells whether white space characters are skipped. | |
| 48 */ | |
| 49 private bool fSkipWhiteSpace= true; | |
| 50 | |
| 51 private bool fReadFromBuffer; | |
| 52 private StringBuffer fBuffer; | |
| 53 private int fIndex; | |
| 54 | |
| 55 | |
|
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56 protected this(Reader reader) { |
| 129 | 57 fReader= reader; |
| 58 fBuffer= new StringBuffer(); | |
| 59 fIndex= 0; | |
| 60 fReadFromBuffer= false; | |
| 61 fCharAfterWhiteSpace= -1; | |
| 62 fWasWhiteSpace= true; | |
| 63 } | |
| 64 | |
| 65 /** | |
| 66 * Computes the substitution for the given character and if necessary | |
| 67 * subsequent characters. Implementation should use <code>nextChar</code> | |
| 68 * to read subsequent characters. | |
| 69 * | |
| 70 * @param c the character to be substituted | |
| 71 * @return the substitution for <code>c</code> | |
| 72 * @throws IOException in case computing the substitution fails | |
| 73 */ | |
|
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74 protected abstract String computeSubstitution(int c) ; |
| 129 | 75 |
| 76 /** | |
| 77 * Returns the internal reader. | |
| 78 * | |
| 79 * @return the internal reader | |
| 80 */ | |
| 81 protected Reader getReader() { | |
| 82 return fReader; | |
| 83 } | |
| 84 | |
| 85 /** | |
| 86 * Returns the next character. | |
| 87 * @return the next character | |
| 88 * @throws IOException in case reading the character fails | |
| 89 */ | |
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90 protected int nextChar() { |
| 129 | 91 fReadFromBuffer= (fBuffer.length() > 0); |
| 92 if (fReadFromBuffer) { | |
| 93 char ch= fBuffer.charAt(fIndex++); | |
| 94 if (fIndex >= fBuffer.length()) { | |
| 95 fBuffer.setLength(0); | |
| 96 fIndex= 0; | |
| 97 } | |
| 98 return ch; | |
| 99 } | |
| 100 | |
| 101 int ch= fCharAfterWhiteSpace; | |
| 102 if (ch is -1) { | |
| 103 ch= fReader.read(); | |
| 104 } | |
| 134 | 105 if (fSkipWhiteSpace && Character.isWhitespace(cast(wchar)ch)) { |
| 129 | 106 do { |
| 107 ch= fReader.read(); | |
| 134 | 108 } while (Character.isWhitespace(cast(wchar)ch)); |
| 129 | 109 if (ch !is -1) { |
| 110 fCharAfterWhiteSpace= ch; | |
| 111 return ' '; | |
| 112 } | |
| 113 } else { | |
| 114 fCharAfterWhiteSpace= -1; | |
| 115 } | |
| 116 return ch; | |
| 117 } | |
| 118 | |
| 119 /** | |
| 120 * @see Reader#read() | |
| 121 */ | |
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122 public int read() { |
| 129 | 123 int c; |
| 124 do { | |
| 125 | |
| 126 c= nextChar(); | |
| 127 while (!fReadFromBuffer) { | |
| 128 String s= computeSubstitution(c); | |
| 129 if (s is null) | |
| 130 break; | |
| 131 if (s.length() > 0) | |
| 132 fBuffer.insert(0, s); | |
| 133 c= nextChar(); | |
| 134 } | |
| 135 | |
| 136 } while (fSkipWhiteSpace && fWasWhiteSpace && (c is ' ')); | |
| 137 fWasWhiteSpace= (c is ' ' || c is '\r' || c is '\n'); | |
| 138 return c; | |
| 139 } | |
| 140 | |
| 141 /** | |
| 142 * @see Reader#ready() | |
| 143 */ | |
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144 public bool ready() { |
| 129 | 145 return fReader.ready(); |
| 146 } | |
| 147 | |
| 148 /** | |
| 149 * @see Reader#close() | |
| 150 */ | |
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151 public void close() { |
| 129 | 152 fReader.close(); |
| 153 } | |
| 154 | |
| 155 /** | |
| 156 * @see Reader#reset() | |
| 157 */ | |
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158 public void reset() { |
| 129 | 159 fReader.reset(); |
| 160 fWasWhiteSpace= true; | |
| 161 fCharAfterWhiteSpace= -1; | |
| 162 fBuffer.setLength(0); | |
| 163 fIndex= 0; | |
| 164 } | |
| 165 | |
| 166 protected final void setSkipWhitespace(bool state) { | |
| 167 fSkipWhiteSpace= state; | |
| 168 } | |
| 169 | |
| 170 protected final bool isSkippingWhitespace() { | |
| 171 return fSkipWhiteSpace; | |
| 172 } | |
| 173 } |