Mercurial > projects > dwt-addons
view dwtx/jface/internal/text/html/SubstitutionTextReader.d @ 155:8442b6b2da2d
Fix import for ResourceBundle
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 25 Aug 2008 00:45:19 +0200 |
parents | 93a6ec48fd28 |
children | 25f1f92fa3df |
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/******************************************************************************* * Copyright (c) 2000, 2006 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.jface.internal.text.html.SubstitutionTextReader; import dwtx.jface.internal.text.html.HTML2TextReader; // packageimport import dwtx.jface.internal.text.html.HTMLPrinter; // packageimport import dwtx.jface.internal.text.html.BrowserInformationControl; // packageimport import dwtx.jface.internal.text.html.HTMLTextPresenter; // packageimport import dwtx.jface.internal.text.html.BrowserInput; // packageimport import dwtx.jface.internal.text.html.SingleCharReader; // packageimport import dwtx.jface.internal.text.html.BrowserInformationControlInput; // packageimport import dwtx.jface.internal.text.html.HTMLMessages; // packageimport import dwt.dwthelper.utils; import java.io.IOException; import java.io.Reader; /** * Reads the text contents from a reader and computes for each character * a potential substitution. The substitution may eat more characters than * only the one passed into the computation routine. * <p> * Moved into this package from <code>dwtx.jface.internal.text.revisions</code>.</p> */ public abstract class SubstitutionTextReader : SingleCharReader { protected static final String LINE_DELIM= System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$ private Reader fReader; protected bool fWasWhiteSpace; private int fCharAfterWhiteSpace; /** * Tells whether white space characters are skipped. */ private bool fSkipWhiteSpace= true; private bool fReadFromBuffer; private StringBuffer fBuffer; private int fIndex; protected this(Reader reader) { fReader= reader; fBuffer= new StringBuffer(); fIndex= 0; fReadFromBuffer= false; fCharAfterWhiteSpace= -1; fWasWhiteSpace= true; } /** * Computes the substitution for the given character and if necessary * subsequent characters. Implementation should use <code>nextChar</code> * to read subsequent characters. * * @param c the character to be substituted * @return the substitution for <code>c</code> * @throws IOException in case computing the substitution fails */ protected abstract String computeSubstitution(int c) ; /** * Returns the internal reader. * * @return the internal reader */ protected Reader getReader() { return fReader; } /** * Returns the next character. * @return the next character * @throws IOException in case reading the character fails */ protected int nextChar() { fReadFromBuffer= (fBuffer.length() > 0); if (fReadFromBuffer) { char ch= fBuffer.charAt(fIndex++); if (fIndex >= fBuffer.length()) { fBuffer.setLength(0); fIndex= 0; } return ch; } int ch= fCharAfterWhiteSpace; if (ch is -1) { ch= fReader.read(); } if (fSkipWhiteSpace && Character.isWhitespace(cast(wchar)ch)) { do { ch= fReader.read(); } while (Character.isWhitespace(cast(wchar)ch)); if (ch !is -1) { fCharAfterWhiteSpace= ch; return ' '; } } else { fCharAfterWhiteSpace= -1; } return ch; } /** * @see Reader#read() */ public int read() { int c; do { c= nextChar(); while (!fReadFromBuffer) { String s= computeSubstitution(c); if (s is null) break; if (s.length() > 0) fBuffer.insert(0, s); c= nextChar(); } } while (fSkipWhiteSpace && fWasWhiteSpace && (c is ' ')); fWasWhiteSpace= (c is ' ' || c is '\r' || c is '\n'); return c; } /** * @see Reader#ready() */ public bool ready() { return fReader.ready(); } /** * @see Reader#close() */ public void close() { fReader.close(); } /** * @see Reader#reset() */ public void reset() { fReader.reset(); fWasWhiteSpace= true; fCharAfterWhiteSpace= -1; fBuffer.setLength(0); fIndex= 0; } protected final void setSkipWhitespace(bool state) { fSkipWhiteSpace= state; } protected final bool isSkippingWhitespace() { return fSkipWhiteSpace; } }