| /******************************************************************************* |
| * 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 org.eclipse.help.internal.UAElement; |
| import org.eclipse.help.internal.dynamic.ProcessorHandler; |
| import org.w3c.dom.Comment; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| /* |
| * Converts the charset in XHTML meta tag to UTF-8. This is the encoding |
| * output by the XMLProcessor, and we need the charset in the meta tags |
| * to match, otherwise browsers will be confused. |
| * Also ensure that all <script> and <div> elements have a child, |
| */ |
| public class XHTMLCharsetHandler extends ProcessorHandler { |
| |
| private static final String ELEMENT_META = "meta"; //$NON-NLS-1$ |
| private static final String ATTRIBUTE_CONTENT = "content"; //$NON-NLS-1$ |
| private static final String PREFIX_CHARSET = "text/html; charset="; //$NON-NLS-1$ |
| private static final String ENCODING_UTF8 = "UTF-8"; //$NON-NLS-1$ |
| |
| @Override |
| public short handle(UAElement element, String id) { |
| if (ELEMENT_META.equals(element.getElementName())) { |
| String content = element.getAttribute(ATTRIBUTE_CONTENT); |
| if (content != null && content.startsWith(PREFIX_CHARSET)) { |
| element.setAttribute(ATTRIBUTE_CONTENT, PREFIX_CHARSET + ENCODING_UTF8); |
| return HANDLED_CONTINUE; |
| } |
| } |
| if (endTagRequired(element)) { |
| Element domElement = element.getElement(); |
| if (domElement.getFirstChild() == null) { |
| Document document = domElement.getOwnerDocument(); |
| Comment child = document.createComment(" "); //$NON-NLS-1$ |
| domElement.appendChild(child); |
| } |
| } |
| return UNHANDLED; |
| } |
| |
| /* |
| * Returns true if this element requires the end tag to be separate from the |
| * start tag to render correctly in browsers. |
| * i.e. generate <a></a> rather than <a/> |
| */ |
| private boolean endTagRequired(UAElement element) { |
| String elementName = element.getElementName(); |
| if ("a".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| if ("p".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| if ("div".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| if ("script".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| if ("textarea".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| if ("iframe".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| if ("title".equalsIgnoreCase(elementName)) return true; //$NON-NLS-1$ |
| return false; |
| } |
| } |