--- /dev/null
+package org.argeo.cms.text;
+
+import java.io.StringReader;
+import java.text.MessageFormat;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.eclipse.rap.rwt.SingletonUtil;
+import org.eclipse.swt.widgets.Widget;
+import org.xml.sax.Attributes;
+import org.xml.sax.InputSource;
+import org.xml.sax.helpers.DefaultHandler;
+
+/**
+ * Copy of RAP v2.3 since it is in an internal package.
+ */
+class MarkupValidatorCopy {
+
+ // Used by Eclipse Scout project
+ public static final String MARKUP_VALIDATION_DISABLED = "org.eclipse.rap.rwt.markupValidationDisabled";
+
+ private static final String DTD = createDTD();
+ private static final Map<String, String[]> SUPPORTED_ELEMENTS = createSupportedElementsMap();
+ private final SAXParser saxParser;
+
+ public static MarkupValidatorCopy getInstance() {
+ return SingletonUtil.getSessionInstance(MarkupValidatorCopy.class);
+ }
+
+ public MarkupValidatorCopy() {
+ saxParser = createSAXParser();
+ }
+
+ public void validate(String text) {
+ StringBuilder markup = new StringBuilder();
+ markup.append(DTD);
+ markup.append("<html>");
+ markup.append(text);
+ markup.append("</html>");
+ InputSource inputSource = new InputSource(new StringReader(markup.toString()));
+ try {
+ saxParser.parse(inputSource, new MarkupHandler());
+ } catch (RuntimeException exception) {
+ throw exception;
+ } catch (Exception exception) {
+ throw new IllegalArgumentException("Failed to parse markup text", exception);
+ }
+ }
+
+ public static boolean isValidationDisabledFor(Widget widget) {
+ return Boolean.TRUE.equals(widget.getData(MARKUP_VALIDATION_DISABLED));
+ }
+
+ private static SAXParser createSAXParser() {
+ SAXParser result = null;
+ SAXParserFactory parserFactory = SAXParserFactory.newInstance();
+ try {
+ result = parserFactory.newSAXParser();
+ } catch (Exception exception) {
+ throw new RuntimeException("Failed to create SAX parser", exception);
+ }
+ return result;
+ }
+
+ private static String createDTD() {
+ StringBuilder result = new StringBuilder();
+ result.append("<!DOCTYPE html [");
+ result.append("<!ENTITY quot \""\">");
+ result.append("<!ENTITY amp \"&\">");
+ result.append("<!ENTITY apos \"'\">");
+ result.append("<!ENTITY lt \"<\">");
+ result.append("<!ENTITY gt \">\">");
+ result.append("<!ENTITY nbsp \" \">");
+ result.append("<!ENTITY ensp \" \">");
+ result.append("<!ENTITY emsp \" \">");
+ result.append("<!ENTITY ndash \"–\">");
+ result.append("<!ENTITY mdash \"—\">");
+ result.append("]>");
+ return result.toString();
+ }
+
+ private static Map<String, String[]> createSupportedElementsMap() {
+ Map<String, String[]> result = new HashMap<String, String[]>();
+ result.put("html", new String[0]);
+ result.put("br", new String[0]);
+ result.put("b", new String[] { "style" });
+ result.put("strong", new String[] { "style" });
+ result.put("i", new String[] { "style" });
+ result.put("em", new String[] { "style" });
+ result.put("sub", new String[] { "style" });
+ result.put("sup", new String[] { "style" });
+ result.put("big", new String[] { "style" });
+ result.put("small", new String[] { "style" });
+ result.put("del", new String[] { "style" });
+ result.put("ins", new String[] { "style" });
+ result.put("code", new String[] { "style" });
+ result.put("samp", new String[] { "style" });
+ result.put("kbd", new String[] { "style" });
+ result.put("var", new String[] { "style" });
+ result.put("cite", new String[] { "style" });
+ result.put("dfn", new String[] { "style" });
+ result.put("q", new String[] { "style" });
+ result.put("abbr", new String[] { "style", "title" });
+ result.put("span", new String[] { "style" });
+ result.put("img", new String[] { "style", "src", "width", "height", "title", "alt" });
+ result.put("a", new String[] { "style", "href", "target", "title" });
+ return result;
+ }
+
+ private static class MarkupHandler extends DefaultHandler {
+
+ @Override
+ public void startElement(String uri, String localName, String name, Attributes attributes) {
+ checkSupportedElements(name, attributes);
+ checkSupportedAttributes(name, attributes);
+ checkMandatoryAttributes(name, attributes);
+ }
+
+ private static void checkSupportedElements(String elementName, Attributes attributes) {
+ if (!SUPPORTED_ELEMENTS.containsKey(elementName)) {
+ throw new IllegalArgumentException("Unsupported element in markup text: " + elementName);
+ }
+ }
+
+ private static void checkSupportedAttributes(String elementName, Attributes attributes) {
+ if (attributes.getLength() > 0) {
+ List<String> supportedAttributes = Arrays.asList(SUPPORTED_ELEMENTS.get(elementName));
+ int index = 0;
+ String attributeName = attributes.getQName(index);
+ while (attributeName != null) {
+ if (!supportedAttributes.contains(attributeName)) {
+ String message = "Unsupported attribute \"{0}\" for element \"{1}\" in markup text";
+ message = MessageFormat.format(message, new Object[] { attributeName, elementName });
+ throw new IllegalArgumentException(message);
+ }
+ index++;
+ attributeName = attributes.getQName(index);
+ }
+ }
+ }
+
+ private static void checkMandatoryAttributes(String elementName, Attributes attributes) {
+ checkIntAttribute(elementName, attributes, "img", "width");
+ checkIntAttribute(elementName, attributes, "img", "height");
+ }
+
+ private static void checkIntAttribute(String elementName, Attributes attributes, String checkedElementName,
+ String checkedAttributeName) {
+ if (checkedElementName.equals(elementName)) {
+ String attribute = attributes.getValue(checkedAttributeName);
+ try {
+ Integer.parseInt(attribute);
+ } catch (NumberFormatException exception) {
+ String message = "Mandatory attribute \"{0}\" for element \"{1}\" is missing or not a valid integer";
+ Object[] arguments = new Object[] { checkedAttributeName, checkedElementName };
+ message = MessageFormat.format(message, arguments);
+ throw new IllegalArgumentException(message);
+ }
+ }
+ }
+
+ }
+
+}
projects / gpl / argeo-suite.git / blobdiff