*
 * @author tomyeh
 */
<<<<<<< HEAD
public class ZkFns {
	protected ZkFns() {}

=======
public class ZkFns extends DspFns {
	private static final Log log = Log.lookup(ZkFns.class);

	/** Denotes whether style sheets are generated for this request. */
	private static final String ATTR_LANG_CSS_GENED
		= "javax.zkoss.zk.lang.css.generated";
		//Naming with javax to be able to shared among portlets
	/** Denotes whether JavaScripts are generated for this request. */
	private static final String ATTR_LANG_JS_GENED
		= "javax.zkoss.zk.lang.js.generated";
		//Naming with javax to be able to shared among portlets
	/** Denotes whether JavaScripts are generated for this request. */
	private static final String ATTR_DESKTOP_INFO_GENED
		= "javax.zkoss.zk.desktopInfo.generated";
	/** Denotes whether the unavailable message is generated for this request. */
	private static final String ATTR_UNAVAILABLE_GENED
		= "javax.zkoss.zk.unavail.generated";

	protected ZkFns() {}

	/** Redraw the specified component into the specified out.
	 *
	 * @param comp the component. If null, nothing happens
	 * @param out the output. If null, the current output
	 * will be used.
	 */
	public static final void redraw(Component comp, Writer out)
	throws IOException {
		if (comp == null)
			return; //nothing to do
		if (out == null)
			out = getCurrentOut();
		try {
			comp.redraw(out);
		} catch (Throwable ex) {
			//Commons-el sometime eat exception, so show more info to debug
			log.realCauseBriefly("Failed to redraw "+comp, ex);
			if (ex instanceof IOException)
				throw (IOException)ex;
			throw UiException.Aide.wrap(ex);
		}
	}
	/** Returns the current writer to generate the output.
	 * @since 3.0.0
	 */
	public static final Writer getCurrentOut() throws IOException {
		return ServletFns.getCurrentOut();
	}

	/** Returns JavaScript for handling the specified response.
	 */
	public static final
	String outResponseJavaScripts(Collection responses) {
		if (responses == null || responses.isEmpty()) return "";

		final StringBuffer sb = new StringBuffer(256)
			.append("\n\n").toString();
	}

	/** Returns HTML tags to include all JavaScript files and codes that are
	 * required when loading a ZUML page.
	 *
	 * 
Note: it assumes {@link Executions#getCurrent} is available.
	 *
	 * 
FUTURE CONSIDERATION: we might generate the inclusion on demand
	 * instead of all at once.
	 *
	 * @param dummy ignored since 3.0.6 (reserved for backward compatibility)
	 */
	public static final String outLangJavaScripts(String dummy) {
		return outLangJavaScripts(Executions.getCurrent(), null, null);
	}
	private static final
	String outLangJavaScripts(Execution exec, WebApp wapp, String deviceType) {
		final ServletRequest request = ServletFns.getCurrentRequest();
		if (WebManager.getRequestLocal(request, ATTR_LANG_JS_GENED) != null)
			return ""; //nothing to generate
		WebManager.setRequestLocal(request, ATTR_LANG_JS_GENED, Boolean.TRUE);

		if (wapp == null) wapp = exec.getDesktop().getWebApp();
		if (deviceType == null) deviceType = exec.getDesktop().getDeviceType();
		final Configuration config = wapp.getConfiguration();

		final StringBuffer sb = new StringBuffer(1536);

		final Set jses = new LinkedHashSet(32);
		for (Iterator it = LanguageDefinition.getByDeviceType(deviceType).iterator();
		it.hasNext();)
			jses.addAll(((LanguageDefinition)it.next()).getJavaScripts());
		for (Iterator it = jses.iterator(); it.hasNext();)
			append(sb, (JavaScript)it.next());

		sb.append("\n\n");

		final Device device = Devices.getDevice(deviceType);
		final String s = device.getEmbedded();
		if (s != null)
			sb.append(s).append('\n');

		return sb.toString();
	}
	/** Generates the unavailable message in HTML tags, if any.
	 * @since 3.5.2
	 */
	public static String outHtmlUnavailable(Page page) {
		final ServletRequest request = ServletFns.getCurrentRequest();
		if (WebManager.getRequestLocal(request, ATTR_UNAVAILABLE_GENED) != null)
			return ""; //nothing to generate
		WebManager.setRequestLocal(request, ATTR_UNAVAILABLE_GENED, Boolean.TRUE);

		final Device device = page.getDesktop().getDevice();
		String s = device.getUnavailableMessage();
		return s != null ?
			"": "";
	}

	private static void append(StringBuffer sb, JavaScript js) {
		sb.append("\n");
	}
	/** Returns HTML tags to include all style sheets that are
	 * defined in all languages.
	 *
	 * 
Note: it assumes {@link Executions#getCurrent} is available.
	 *
	 * 
In addition to style sheets defined in lang.xml and lang-addon.xml,
	 * it also include:
	 * 

	 * 
The style sheet specified in the theme-uri parameter.
	 * 
	 *
	 * 
FUTURE CONSIDERATION: we might generate the inclusion on demand
	 * instead of all at once.
	 */
	public static final String outLangStyleSheets() {
		return outLangStyleSheets(Executions.getCurrent(), null, null);
	}
	private static final
	String outLangStyleSheets(Execution exec, WebApp wapp, String deviceType) {
		final ServletRequest request = ServletFns.getCurrentRequest();
		if (WebManager.getRequestLocal(request, ATTR_LANG_CSS_GENED) != null)
			return ""; //nothing to generate
		WebManager.setRequestLocal(request, ATTR_LANG_CSS_GENED, Boolean.TRUE);

		final StringBuffer sb = new StringBuffer(512);
		for (Iterator it = getStyleSheets(exec, wapp, deviceType).iterator();
		it.hasNext();)
			append(sb, (StyleSheet)it.next(), exec, null);

		if (sb.length() > 0) sb.append('\n');
		return sb.toString();
	}
	/** Returns HTML tags to include style sheets of the specified device
	 * of the current application.
	 *
	 * 
Unlike {@link #outLangStyleSheets}, it uses the current
	 *  servlet context
	 * to look for the style sheets. Thus, this method can be used even
	 * if the current execution is not available ({@link Executions#getCurrent}
	 * can be null).
	 *
	 * 
In summary:

	 * {@link #outLangStyleSheets} is used to design the component
	 * templates, while {@link DspFns#outDeviceStyleSheets} is used by DSP/JSP
	 * that does nothing with ZUML pages (i.e., not part of an execution).
	 *
	 * @param exec the execution (never null)
	 * @param wapp the Web application.
	 * If null, exec.getDesktop().getWebApp() is used.
	 * So you have to specify it if the execution is not associated
	 * with desktop (a fake execution).
	 * @param deviceType the device type, such as ajax.
	 * If null, exec.getDesktop().getDeviceType() is used.
	 * So you have to specify it if the execution is not associated
	 * with desktop (a fake execution).
	 */
	/*package*/ static final
	String outDeviceStyleSheets(Execution exec, WebApp wapp, String deviceType) {
		final ServletRequest request = ServletFns.getCurrentRequest();
		if (WebManager.getRequestLocal(request, ATTR_LANG_CSS_GENED) != null)
			return ""; //nothing to generate
		WebManager.setRequestLocal(request, ATTR_LANG_CSS_GENED, Boolean.TRUE);

		final StringBuffer sb = new StringBuffer(256);
		final List ss = getStyleSheets(exec, wapp, deviceType);
		for (Iterator it = ss.iterator(); it.hasNext();)
			append(sb, (StyleSheet)it.next(), exec, null);
		return sb.toString();
	}

	/** Returns a list of {@link StyleSheet} that shall be generated
	 * to the client for the specified execution.
	 */
	public static final List getStyleSheets(Execution exec) {
		final Desktop desktop = exec.getDesktop();
		return getStyleSheets(exec, null, null);
	}
	private static final
	List getStyleSheets(Execution exec, WebApp wapp, String deviceType) {
		if (wapp == null) wapp = exec.getDesktop().getWebApp();
		if (deviceType == null) deviceType = exec.getDesktop().getDeviceType();

		final Configuration config = wapp.getConfiguration();
		final Set disabled = config.getDisabledThemeURIs();
		final List sses = new LinkedList(); //a list of StyleSheet
		for (Iterator it = LanguageDefinition.getByDeviceType(deviceType).iterator();
		it.hasNext();) {
			final LanguageDefinition langdef = (LanguageDefinition)it.next();
			for (Iterator e = langdef.getStyleSheets().iterator(); e.hasNext();) {
				final StyleSheet ss = (StyleSheet)e.next();
				if (!disabled.contains(ss.getHref()))
					sses.add(ss);
			}
		}

		//Process configuration
		final ThemeProvider themeProvider = config.getThemeProvider();
		if (themeProvider != null) {
			final List org = new LinkedList();
			for (Iterator it =  sses.iterator(); it.hasNext();) {
				final StyleSheet ss = (StyleSheet)it.next();
				org.add(ss.getHref()); //we don't support getContent
			}

			final String[] hrefs = config.getThemeURIs();
			for (int j = 0; j < hrefs.length; ++j)
				org.add(hrefs[j]);

			sses.clear();
			final Collection res = themeProvider.getThemeURIs(exec, org);
			if (res != null) {
				for (Iterator it = res.iterator(); it.hasNext();)
					sses.add(new StyleSheet((String)it.next(), "text/css"));
			}
		} else {
			final String[] hrefs = config.getThemeURIs();
			for (int j = 0; j < hrefs.length; ++j)
				sses.add(new StyleSheet(hrefs[j], "text/css"));
		}
		return sses;
	}

	private static void append(StringBuffer sb, StyleSheet ss,
	Execution exec, Page page) {
		String href = ss.getHref();
		if (href != null) {
			try {
				if (exec != null)
					href = (String)exec.evaluate(page, href, String.class);

				if (href != null && href.length() > 0)
					sb.append("\n");
			} catch (javax.servlet.ServletException ex) {
				throw new UiException(ex);
			}
		} else {
			sb.append("\n\n").append(ss.getContent()).append("\n");
		}
	}

>>>>>>> fdcb7f50da9c90bcecbad6f1db1a342f0b76bdc0
	/** Converts the specified URI to absolute if necessary.
	 * Refer to {@link org.zkoss.zk.ui.Execution#toAbsoluteURI}.
	 *

 *
 * @author tomyeh
 */
public class ZkFns {
	protected ZkFns() {}

	/** Converts the specified URI to absolute if necessary.
	 * Refer to {@link org.zkoss.zk.ui.Execution#toAbsoluteURI}.
	 *