| /******************************************************************************* |
| * Copyright (c) 2006, 2015 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 |
| *******************************************************************************/ |
| package org.eclipse.help.internal.xhtml; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.Reader; |
| |
| import org.eclipse.core.runtime.QualifiedName; |
| import org.eclipse.core.runtime.content.IContentDescriber; |
| import org.eclipse.core.runtime.content.IContentDescription; |
| import org.eclipse.help.internal.search.ASCIIReader; |
| |
| /** |
| * A content describer for XHTML. |
| */ |
| public class XHTMLContentDescriber implements IContentDescriber { |
| |
| private static final String XHTML_DTD_PREFIX = "http://www.w3.org/TR/xhtml"; //$NON-NLS-1$ |
| |
| public static final int BUFFER_SIZE = 4096; |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.core.runtime.content.IContentDescriber#describe(java.io.InputStream, org.eclipse.core.runtime.content.IContentDescription) |
| */ |
| @Override |
| public int describe(InputStream contents, IContentDescription description) throws IOException { |
| Reader reader = null; |
| try { |
| reader = new ASCIIReader(contents, BUFFER_SIZE); |
| char[] chars = new char[BUFFER_SIZE]; |
| reader.read(chars); |
| String str = new String(chars); |
| return (str.indexOf(XHTML_DTD_PREFIX) != -1) ? VALID : INVALID; |
| } |
| catch (Exception e) { |
| return INDETERMINATE; |
| } |
| finally { |
| if (reader != null) { |
| try { |
| reader.close(); |
| } |
| catch (IOException e) { |
| } |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.core.runtime.content.IContentDescriber#getSupportedOptions() |
| */ |
| @Override |
| public QualifiedName[] getSupportedOptions() { |
| return new QualifiedName[0]; |
| } |
| } |