zkfns.java

ZK 基础介绍 功能操作 模块 结合数据库操作

	public static final List getStyleSheets(Execution exec) {
		//Process all languages
		final Desktop desktop = exec.getDesktop();
		final Configuration config = desktop.getWebApp().getConfiguration();
		final Set disabled = config.getDisabledThemeURIs();
		final String deviceType = desktop.getDeviceType();
		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<link rel=\"stylesheet\" type=\"")
						.append(ss.getType()).append("\" href=\"")
						.append(ServletFns.encodeURL(href))
						.append("\"/>");
			} catch (javax.servlet.ServletException ex) {
				throw new UiException(ex);
			}
		} else {
			sb.append("\n<style");
			if (ss.getType() != null)
				sb.append(" type=\"").append(ss.getType()).append('"');
			sb.append(">\n").append(ss.getContent()).append("\n</style>");
		}
	}

	/** Converts the specified URI to absolute if necessary.
	 * Refer to {@link Execution#toAbsoluteURI}.
	 *
	 * @param skipInclude whether not to convert to an absolute URI if
	 * the current page is included by another page.
	 * When use the include directive, skipInclude shall be true.
	 */
	public static String toAbsoluteURI(String uri, boolean skipInclude) {
		return Executions.getCurrent().toAbsoluteURI(uri, skipInclude);
	}
	/** Converts the specified URI to absolute if not included by another page.
	 * It is a shortcut of {@link #toAbsoluteURI(String, boolean)} with skipInclude
	 * is true.
	 */
	public static String toAbsoluteURI(String uri) {
		return toAbsoluteURI(uri, true);
	//we preserve this method for backward compatibility (since some developers
	//might have old version core.dsp.tld
	}

	/** Returns the content that will be placed inside the header element
	 * of the specified page.
	 * For HTML, the header element is the HEAD element.
	 */
	public static final String outHeaders(Page page) {
		return ((PageCtrl)page).getHeaders();
	}
	/** Returns the content that will be generated
	 * as the attributes of the root element of the specified page.
	 * For HTML, the root element is the HTML element.
	 */
	public static final String outRootAttributes(Page page) {
		return ((PageCtrl)page).getRootAttributes();
	}

	/** Returns the content type (never null).
	 * @since 3.0.0
	 */
	public static final String outContentType(Page page) {
		final String contentType = ((PageCtrl)page).getContentType();
		return contentType != null ? contentType:
			page.getDesktop().getDevice().getContentType();
	}
	/** Returns the doc type, or null if not available.
	 * It is null or &lt;!DOCTYPE ...&gt;.
	 * @since 3.0.0
	 */
	public static final String outDocType(Page page) {
		final String docType = ((PageCtrl)page).getDocType();
		return trimAndLF(docType != null ?
			docType: page.getDesktop().getDevice().getDocType());
	}
	/** Trims and appends a linefeed if necessary.
	 */
	private static final String trimAndLF(String s) {
		if (s != null) {
			s = s.trim();
			final int len = s.length();
			if (len > 0 && s.charAt(len-1) != '\n')
				s += '\n';
		}
		return s;
	}
	/** Returns the first line to be generated to the output,
	 * or null if no special first line.
	 */
	public static final String outFirstLine(Page page) {
		return trimAndLF(((PageCtrl)page).getFirstLine());
	}
	/** Generates Locale-dependent strings in JavaScript syntax.
	 */
	public final static String outLocaleJavaScript() {
		final Locale locale = Locales.getCurrent();
		return outNumberJavaScript(locale) + outDateJavaScript(locale);
	}
	/** Output number relevant texts.
	 */
	private final static String outNumberJavaScript(Locale locale) {
		final DecimalFormatSymbols symbols = new DecimalFormatSymbols(locale);
		final StringBuffer sb = new StringBuffer(128);
		appendAssignJavaScript(
			sb, "zk.GROUPING", symbols.getGroupingSeparator());
		appendAssignJavaScript(
			sb, "zk.DECIMAL", symbols.getDecimalSeparator());
		appendAssignJavaScript(
			sb, "zk.PERCENT", symbols.getPercent());
		appendAssignJavaScript(
			sb, "zk.MINUS", symbols.getMinusSign());
		return sb.toString();
	}
	private final static
	void appendAssignJavaScript(StringBuffer sb, String nm, char val) {
		final char quot = val == '"' ? '\'': '"';
		sb.append(nm).append('=').append(quot).append(val).append(quot).append(";\n");
	}
	/** Output date/calendar relevant labels.
	 */
	private final static String outDateJavaScript(Locale locale) {
		synchronized (_datejs) {
			final String djs = (String)_datejs.get(locale);
			if (djs != null) return djs;
		}

		String djs = getDateJavaScript(locale);
		synchronized (_datejs) { //OK to race
			//To minimize memory use, reuse the string if they are the same
			//which is common
			for (Iterator it = _datejs.values().iterator(); it.hasNext();) {
				final String val = (String)it.next();
				if (val.equals(djs))
					djs = val; 
			}
			_datejs.put(locale, djs);
		}
		return djs;
	}
	private final static String getDateJavaScript(Locale locale) {
		final StringBuffer sb = new StringBuffer(512);

		final Calendar cal = Calendar.getInstance(locale);
		cal.clear();

		final int firstDayOfWeek = cal.getFirstDayOfWeek();
		sb.append("zk.DOW_1ST=")
			.append(firstDayOfWeek - Calendar.SUNDAY)
			.append(";\n");

		final boolean zhlang = locale.getLanguage().equals("zh");
		SimpleDateFormat df = new SimpleDateFormat("E", locale);
		final String[] sdow = new String[7], s2dow = new String[7];
		for (int j = firstDayOfWeek, k = 0; k < 7; ++k) {
			cal.set(Calendar.DAY_OF_WEEK, j);
			sdow[k] = df.format(cal.getTime());
			if (++j > Calendar.SATURDAY) j = Calendar.SUNDAY;

			if (zhlang) {
				s2dow[k] = sdow[k].length() >= 3 ?
					sdow[k].substring(2): sdow[k];
			} else {
				final int len = sdow[k].length();
				final char cc  = sdow[k].charAt(len - 1);
				s2dow[k] = cc == '.' || cc == ',' ?
					sdow[k].substring(0, len - 1): sdow[k];
			}
		}

		df = new SimpleDateFormat("EEEE", locale);
		final String[] fdow = new String[7];
		for (int j = firstDayOfWeek, k = 0; k < 7; ++k) {
			cal.set(Calendar.DAY_OF_WEEK, j);
			fdow[k] = df.format(cal.getTime());
			if (++j > Calendar.SATURDAY) j = Calendar.SUNDAY;
		}

		df = new SimpleDateFormat("MMM", locale);
		final String[] smon = new String[12], s2mon = new String[12];
		for (int j = 0; j < 12; ++j) {
			cal.set(Calendar.MONTH, j);
			smon[j] = df.format(cal.getTime());

			if (zhlang) {
				s2mon[j] = smon[0].length() >= 2 ? //remove the last char
					smon[j].substring(0, smon[j].length() -1): smon[j];
			} else {
				final int len = smon[j].length();
				final char cc  = smon[j].charAt(len - 1);
				s2mon[j] = cc == '.' || cc == ',' ?
					smon[j].substring(0, len - 1): smon[j];
			}
		}

		df = new SimpleDateFormat("MMMM", locale);
		final String[] fmon = new String[12];
		for (int j = 0; j < 12; ++j) {
			cal.set(Calendar.MONTH, j);
			fmon[j] = df.format(cal.getTime());
		}

		appendJavaScriptArray(sb, "SDOW", sdow);
		if (Objects.equals(s2dow, sdow))
			sb.append("zk.S2DOW=zk.SDOW;\n");
		else
			appendJavaScriptArray(sb, "S2DOW", s2dow);
		if (Objects.equals(fdow, sdow))
			sb.append("zk.FDOW=zk.SDOW;\n");
		else
			appendJavaScriptArray(sb, "FDOW", fdow);

		appendJavaScriptArray(sb, "SMON", smon);
		if (Objects.equals(s2mon, smon))
			sb.append("zk.S2MON=zk.SMON;\n");
		else
			appendJavaScriptArray(sb, "S2MON", s2mon);
		if (Objects.equals(fmon, smon))
			sb.append("zk.FMON=zk.SMON;\n");
		else
			appendJavaScriptArray(sb, "FMON", fmon);

		//AM/PM available since ZK 3.0
		df = new SimpleDateFormat("a", locale);
		cal.set(Calendar.HOUR_OF_DAY, 3);
		final String[] ampm = new String[2];
		ampm[0] = df.format(cal.getTime());
		cal.set(Calendar.HOUR_OF_DAY, 15);
		ampm[1] = df.format(cal.getTime());
		appendJavaScriptArray(sb, "APM", ampm);

		return sb.toString();
	}
	private static final void appendJavaScriptArray(StringBuffer sb,
	String varnm, String[] vals) {
		sb.append("zk.").append(varnm).append("=[");
		for (int j = 0;;) {
			sb.append('"').append(Strings.escape(vals[j], "\\\"")).append('"');
			if (++j >= vals.length) break;
			else sb.append(',');
		}
		sb.append("];\n");
	}
	private static final CacheMap _datejs;
	static {
		_datejs = new CacheMap(8);
		_datejs.setLifetime(24*60*60*1000);
	}
}