vaadin-framework/src/com/itmill/toolkit/terminal/gwt/client/ui/ITextualDate.java

package com.itmill.toolkit.terminal.gwt.client.ui;

import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.ChangeListener;
import com.google.gwt.user.client.ui.Widget;
import com.itmill.toolkit.terminal.gwt.client.ApplicationConnection;
import com.itmill.toolkit.terminal.gwt.client.DateLocale;
import com.itmill.toolkit.terminal.gwt.client.Paintable;
import com.itmill.toolkit.terminal.gwt.client.UIDL;
import com.itmill.toolkit.terminal.gwt.client.util.SimpleDateFormat;

public class ITextualDate extends IDateField implements Paintable,
		ChangeListener {

	private ITextField text;

	private SimpleDateFormat format;

	private DateLocale dl;

	public ITextualDate() {
		super();
		text = new ITextField();
		text.addChangeListener(this);
		add(text);
	}

	public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
		super.updateFromUIDL(uidl, client);
		buildDate();
	}

	public void buildDate() {
		dl = new DateLocale();
		DateLocale.setLocale(currentLocale);

		DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_YEAR;
		if (currentResolution == IDateField.RESOLUTION_MONTH)
			DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_MONTH;
		else if (currentResolution >= IDateField.RESOLUTION_DAY)
			DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_DAY;

		format = new SimpleDateFormat(cleanFormat(dts.getDateFormat()));
		format.setLocale(dl);

		// Size the textfield a bit smaller if no clock time is needed
		if (currentResolution <= IDateField.RESOLUTION_DAY)
			text.setColumns(12);

		// Create the initial text for the textfield
		String dateText = "";
		if (date != null) {
			dateText = format.format(date);

			if (currentResolution >= IDateField.RESOLUTION_HOUR) {
				DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_ALL;
				int h = date.getHours();
				if (h > 11 && dts.isTwelveHourClock())
					h -= 12;
				int m = currentResolution > IDateField.RESOLUTION_HOUR ? date
						.getMinutes() : 0;
				dateText += " " + (h < 10 ? "0" + h : "" + h)
						+ dts.getClockDelimeter() + (m < 10 ? "0" + m : "" + m);
			}
			if (currentResolution >= IDateField.RESOLUTION_SEC) {
				int s = date.getSeconds();
				dateText += dts.getClockDelimeter()
						+ (s < 10 ? "0" + s : "" + s);
			}
			if (currentResolution == IDateField.RESOLUTION_MSEC) {
				int ms = getMilliseconds();
				String text = "" + ms;
				if (ms < 10)
					text = "00" + text;
				else if (ms < 100)
					text = "0" + text;
				dateText += "." + text;
			}
			if (currentResolution >= IDateField.RESOLUTION_HOUR
					&& dts.isTwelveHourClock())
				dateText += " "
						+ (date.getHours() < 12 ? dts.getAmPmStrings()[0] : dts
								.getAmPmStrings()[1]);
		}

		text.setText(dateText);
		text.setEnabled(enabled && !readonly);

		if (readonly)
			text.addStyleName("i-readonly");
		else
			text.removeStyleName("i-readonly");
	}

	public void onChange(Widget sender) {
		if (sender == text) {
			if (!text.getText().equals("")) {
				DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_ALL;
				if (currentResolution == IDateField.RESOLUTION_YEAR)
					DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_YEAR;
				else if (currentResolution == IDateField.RESOLUTION_MONTH)
					DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_MONTH;
				else if (currentResolution == IDateField.RESOLUTION_DAY)
					DateLocale.SUPPORTED_DF_TOKENS = DateLocale.TOKENS_RESOLUTION_DAY;

				String f = cleanFormat(dts.getDateFormat());

				if (currentResolution >= IDateField.RESOLUTION_HOUR)
					f += " "
							+ (dts.isTwelveHourClock() ? DateLocale.TOKEN_HOUR_12
									+ DateLocale.TOKEN_HOUR_12
									: DateLocale.TOKEN_HOUR_24
											+ DateLocale.TOKEN_HOUR_24)
							+ dts.getClockDelimeter() + DateLocale.TOKEN_MINUTE
							+ DateLocale.TOKEN_MINUTE;
				if (currentResolution >= IDateField.RESOLUTION_SEC)
					f += dts.getClockDelimeter() + DateLocale.TOKEN_SECOND
							+ DateLocale.TOKEN_SECOND;
				if (currentResolution == IDateField.RESOLUTION_MSEC)
					f += "." + DateLocale.TOKEN_MILLISECOND
							+ DateLocale.TOKEN_MILLISECOND
							+ DateLocale.TOKEN_MILLISECOND;
				if (currentResolution >= IDateField.RESOLUTION_HOUR
						&& dts.isTwelveHourClock())
					f += " " + DateLocale.TOKEN_AM_PM;

				format = new SimpleDateFormat(f);
				DateLocale.setLocale(currentLocale);
				format.setLocale(dl);

				try {
					date = format.parse(text.getText());
				} catch (Exception e) {
					ApplicationConnection.getConsole().log(e.getMessage());
					text.addStyleName(ITextField.CLASSNAME + "-error");
					Timer t = new Timer() {
						public void run() {
							text.removeStyleName(ITextField.CLASSNAME
									+ "-error");
						}
					};
					t.schedule(2000);
					return;
				}

			} else
				date = null;

			// Update variables
			// (only the smallest defining resolution needs to be immediate)
			client.updateVariable(id, "year",
					date != null ? date.getYear() + 1900 : -1,
					currentResolution == IDateField.RESOLUTION_YEAR
							&& immediate);
			if (currentResolution >= IDateField.RESOLUTION_MONTH)
				client.updateVariable(id, "month", date != null ? date
						.getMonth() + 1 : -1,
						currentResolution == IDateField.RESOLUTION_MONTH
								&& immediate);
			if (currentResolution >= IDateField.RESOLUTION_DAY)
				client.updateVariable(id, "day", date != null ? date.getDate()
						: -1, currentResolution == IDateField.RESOLUTION_DAY
						&& immediate);
			if (currentResolution >= IDateField.RESOLUTION_HOUR)
				client.updateVariable(id, "hour", date != null ? date
						.getHours() : -1,
						currentResolution == IDateField.RESOLUTION_HOUR
								&& immediate);
			if (currentResolution >= IDateField.RESOLUTION_MIN)
				client.updateVariable(id, "min", date != null ? date
						.getMinutes() : -1,
						currentResolution == IDateField.RESOLUTION_MIN
								&& immediate);
			if (currentResolution >= IDateField.RESOLUTION_SEC)
				client.updateVariable(id, "sec", date != null ? date
						.getSeconds() : -1,
						currentResolution == IDateField.RESOLUTION_SEC
								&& immediate);
			if (currentResolution == IDateField.RESOLUTION_MSEC)
				client.updateVariable(id, "msec",
						date != null ? getMilliseconds() : -1, immediate);

			buildDate();
		}
	}

	private String cleanFormat(String format) {
		// Remove unnecessary d & M if resolution is too low
		if (currentResolution < IDateField.RESOLUTION_DAY)
			format = format.replaceAll("d", "");
		if (currentResolution < IDateField.RESOLUTION_MONTH)
			format = format.replaceAll("M", "");

		// Remove unsupported patterns
		// TODO support for 'G', era designator (used at least in Japan)
		format = format.replaceAll("[GzZwWkK]", "");

		// Remove extra delimiters ('/' and '.')
		while (format.startsWith("/") || format.startsWith(".")
				|| format.startsWith("-"))
			format = format.substring(1);
		while (format.endsWith("/") || format.endsWith(".")
				|| format.endsWith("-"))
			format = format.substring(0, format.length() - 1);

		// Remove duplicate delimiters
		format = format.replaceAll("//", "/");
		format = format.replaceAll("\\.\\.", ".");
		format = format.replaceAll("--", "-");

		return format.trim();
	}
}