1 files changed, 179 insertions, 0 deletions
diff --git a/org.eclipse.help.base/src/org/eclipse/help/internal/xhtml/UAContentParser.java b/org.eclipse.help.base/src/org/eclipse/help/internal/xhtml/UAContentParser.java
new file mode 100644
index 000000000..5a9782d99
--- /dev/null
+++ b/org.eclipse.help.base/src/org/eclipse/help/internal/xhtml/UAContentParser.java
@@ -0,0 +1,179 @@
+/***************************************************************************************************
+ * Copyright (c) 2004, 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
+ **************************************************************************************************/
+
+package org.eclipse.help.internal.xhtml;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Hashtable;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.eclipse.help.internal.HelpPlugin;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+
+
+/**
+ * 
+ */
+public class UAContentParser {
+
+	private static String TAG_HTML = "html"; //$NON-NLS-1$
+	protected static String XHTML1_TRANSITIONAL = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"; //$NON-NLS-1$
+	protected static String XHTML1_STRICT = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"; //$NON-NLS-1$
+	protected static String XHTML1_FRAMESET = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"; //$NON-NLS-1$
+
+
+	protected static Hashtable dtdMap = new Hashtable();
+
+	static {
+		String dtdBaseLocation = "dtds/xhtml1-20020801/"; //$NON-NLS-1$
+
+		String dtdLocation = dtdBaseLocation + "xhtml1-transitional.dtd"; //$NON-NLS-1$
+		URL dtdURL_T = BundleUtil.getResourceAsURL(dtdLocation, "org.eclipse.ui.intro"); //$NON-NLS-1$
+		dtdMap.put(XHTML1_TRANSITIONAL, dtdURL_T);
+
+		dtdLocation = dtdBaseLocation + "xhtml1-strict.dtd"; //$NON-NLS-1$
+		URL dtdURL_S = BundleUtil.getResourceAsURL(dtdLocation, "org.eclipse.ui.intro"); //$NON-NLS-1$
+		dtdMap.put(XHTML1_STRICT, dtdURL_S);
+
+		dtdLocation = dtdBaseLocation + "xhtml1-frameset.dtd"; //$NON-NLS-1$
+		URL dtdURL_F = BundleUtil.getResourceAsURL(dtdLocation, "org.eclipse.ui.intro"); //$NON-NLS-1$
+		dtdMap.put(XHTML1_FRAMESET, dtdURL_F);
+	}
+
+
+
+	private Document document;
+	private boolean hasXHTMLContent;
+
+	public UAContentParser(String content) {
+		parseDocument(content);
+	}
+
+	public UAContentParser(InputStream content) {
+		parseDocument(content);
+	}
+
+	/**
+	 * Creates a config parser assuming that the passed content represents a URL to the content
+	 * file.
+	 */
+	public void parseDocument(Object content) {
+		try {
+			document = doParse(content);
+			if (document != null) {
+
+				Element rootElement = document.getDocumentElement();
+				// DocumentType docType = document.getDoctype();
+				if (rootElement.getTagName().equals(TAG_HTML)) {
+					hasXHTMLContent = true;
+				}
+			}
+		} catch (Exception e) {
+			HelpPlugin.logError("Could not load content file: " + content, e); //$NON-NLS-1$
+		}
+	}
+
+	private DocumentBuilder createParser() {
+
+		try {
+			DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
+			docFactory.setValidating(false);
+			docFactory.setNamespaceAware(true);
+			docFactory.setExpandEntityReferences(false);
+			DocumentBuilder parser = docFactory.newDocumentBuilder();
+
+			parser.setEntityResolver(new EntityResolver() {
+
+				public InputSource resolveEntity(String publicId, String systemId) throws SAXException,
+						IOException {
+
+					if (systemId.equals(XHTML1_TRANSITIONAL) || systemId.equals(XHTML1_STRICT)
+							|| systemId.equals(XHTML1_FRAMESET)) {
+
+						URL dtdURL = (URL) dtdMap.get(systemId);
+						InputSource in = new InputSource(dtdURL.openStream());
+						in.setSystemId(dtdURL.toExternalForm());
+						return in;
+					}
+					return null;
+				}
+			});
+			return parser;
+		} catch (ParserConfigurationException pce) {
+			HelpPlugin.logError(pce.getMessage(), pce);
+		}
+		return null;
+	}
+
+
+
+	private Document doParse(Object fileObject) {
+		Document document = null;
+		try {
+			DocumentBuilder parser = createParser();
+			if (fileObject instanceof String)
+				document = parser.parse((String) fileObject);
+			else if (fileObject instanceof InputStream)
+				document = parser.parse((InputStream) fileObject);
+
+			return document;
+
+		} catch (SAXParseException spe) {
+			StringBuffer buffer = new StringBuffer("Parser error in line "); //$NON-NLS-1$
+			buffer.append(spe.getLineNumber());
+			buffer.append(", uri "); //$NON-NLS-1$
+			buffer.append(spe.getSystemId());
+			buffer.append("\n"); //$NON-NLS-1$   
+			buffer.append(spe.getMessage());
+
+			Exception x = spe;
+			if (spe.getException() != null)
+				x = spe.getException();
+			HelpPlugin.logError(buffer.toString(), x);
+
+		} catch (SAXException sxe) {
+			Exception x = sxe;
+			if (sxe.getException() != null)
+				x = sxe.getException();
+			HelpPlugin.logError(x.getMessage(), x);
+
+		} catch (IOException ioe) {
+			HelpPlugin.logError(ioe.getMessage(), ioe);
+		}
+		return null;
+	}
+
+	/**
+	 * Returned the DOM representing the xml content file. May return null if parsing the file
+	 * failed.
+	 * 
+	 * @return Returns the document.
+	 */
+	public Document getDocument() {
+		return document;
+	}
+
+	public boolean hasXHTMLContent() {
+		return hasXHTMLContent;
+	}
+
+
+
+
+}