Copy some libcore.icu classes to android.text.format (cdf14236) · Commits · e / os / android_frameworks_base

core/java/android/text/format/DateTimeFormat.java

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		/*
		* Copyright (C) 2015 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.text.format;

		import android.icu.text.DateFormat;
		import android.icu.text.DateTimePatternGenerator;
		import android.icu.text.DisplayContext;
		import android.icu.text.SimpleDateFormat;
		import android.icu.util.Calendar;
		import android.icu.util.ULocale;

		import libcore.util.BasicLruCache;

		/**
		* A formatter that outputs a single date/time.
		*/
		public class DateTimeFormat {
		private static final libcore.icu.DateTimeFormat.FormatterCache
		CACHED_FORMATTERS = new libcore.icu.DateTimeFormat.FormatterCache();

		static class FormatterCache extends BasicLruCache<String, DateFormat> {
		FormatterCache() {
		super(8);
		}
		}

		private DateTimeFormat() {
		}

		public static String format(ULocale icuLocale, Calendar time, int flags,
		DisplayContext displayContext) {
		String skeleton = DateUtilsBridge.toSkeleton(time, flags);
		String key = skeleton + "\t" + icuLocale + "\t" + time.getTimeZone();
		synchronized(CACHED_FORMATTERS) {
		DateFormat formatter = CACHED_FORMATTERS.get(key);
		if (formatter == null) {
		DateTimePatternGenerator generator = DateTimePatternGenerator.getInstance(icuLocale);
		formatter = new SimpleDateFormat(generator.getBestPattern(skeleton), icuLocale);
		CACHED_FORMATTERS.put(key, formatter);
		}
		formatter.setContext(displayContext);
		return formatter.format(time);
		}
		}
		}

core/java/android/text/format/DateUtilsBridge.java

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		/*
		* Copyright (C) 2015 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.text.format;

		import android.icu.util.Calendar;
		import android.icu.util.GregorianCalendar;
		import android.icu.util.TimeZone;
		import android.icu.util.ULocale;

		/**
		* Common methods and constants for the various ICU formatters used to support
		* {@link android.text.format.DateUtils}.
		* @hide
		*/
		final class DateUtilsBridge {
		// These are all public API in DateUtils. There are others, but they're either for use with
		// other methods (like FORMAT_ABBREV_RELATIVE), don't internationalize (like FORMAT_CAP_AMPM),
		// or have never been implemented anyway.
		public static final int FORMAT_SHOW_TIME = 0x00001;
		public static final int FORMAT_SHOW_WEEKDAY = 0x00002;
		public static final int FORMAT_SHOW_YEAR = 0x00004;
		public static final int FORMAT_NO_YEAR = 0x00008;
		public static final int FORMAT_SHOW_DATE = 0x00010;
		public static final int FORMAT_NO_MONTH_DAY = 0x00020;
		public static final int FORMAT_12HOUR = 0x00040;
		public static final int FORMAT_24HOUR = 0x00080;
		public static final int FORMAT_UTC = 0x02000;
		public static final int FORMAT_ABBREV_TIME = 0x04000;
		public static final int FORMAT_ABBREV_WEEKDAY = 0x08000;
		public static final int FORMAT_ABBREV_MONTH = 0x10000;
		public static final int FORMAT_NUMERIC_DATE = 0x20000;
		public static final int FORMAT_ABBREV_RELATIVE = 0x40000;
		public static final int FORMAT_ABBREV_ALL = 0x80000;

		/**
		* Creates an immutable ICU timezone backed by the specified libcore timezone data. At the time of
		* writing the libcore implementation is faster but restricted to 1902 - 2038.
		* Callers must not modify the {@code tz} after calling this method.
		*/
		public static android.icu.util.TimeZone icuTimeZone(java.util.TimeZone tz) {
		android.icu.util.TimeZone icuTimeZone = TimeZone.getTimeZone(tz.getID());
		icuTimeZone.freeze(); // Optimization - allows the timezone to be copied cheaply.
		return icuTimeZone;
		}

		public static Calendar createIcuCalendar(android.icu.util.TimeZone icuTimeZone, ULocale icuLocale,
		long timeInMillis) {
		Calendar calendar = new GregorianCalendar(icuTimeZone, icuLocale);
		calendar.setTimeInMillis(timeInMillis);
		return calendar;
		}

		public static String toSkeleton(Calendar calendar, int flags) {
		return toSkeleton(calendar, calendar, flags);
		}

		public static String toSkeleton(Calendar startCalendar, Calendar endCalendar, int flags) {
		if ((flags & FORMAT_ABBREV_ALL) != 0) {
		flags \|= FORMAT_ABBREV_MONTH \| FORMAT_ABBREV_TIME \| FORMAT_ABBREV_WEEKDAY;
		}

		String monthPart = "MMMM";
		if ((flags & FORMAT_NUMERIC_DATE) != 0) {
		monthPart = "M";
		} else if ((flags & FORMAT_ABBREV_MONTH) != 0) {
		monthPart = "MMM";
		}

		String weekPart = "EEEE";
		if ((flags & FORMAT_ABBREV_WEEKDAY) != 0) {
		weekPart = "EEE";
		}

		String timePart = "j"; // "j" means choose 12 or 24 hour based on current locale.
		if ((flags & FORMAT_24HOUR) != 0) {
		timePart = "H";
		} else if ((flags & FORMAT_12HOUR) != 0) {
		timePart = "h";
		}

		// If we've not been asked to abbreviate times, or we're using the 24-hour clock (where it
		// never makes sense to leave out the minutes), include minutes. This gets us times like
		// "4 PM" while avoiding times like "16" (for "16:00").
		if ((flags & FORMAT_ABBREV_TIME) == 0 \|\| (flags & FORMAT_24HOUR) != 0) {
		timePart += "m";
		} else {
		// Otherwise, we're abbreviating a 12-hour time, and should only show the minutes
		// if they're not both "00".
		if (!(onTheHour(startCalendar) && onTheHour(endCalendar))) {
		timePart = timePart + "m";
		}
		}

		if (fallOnDifferentDates(startCalendar, endCalendar)) {
		flags \|= FORMAT_SHOW_DATE;
		}

		if (fallInSameMonth(startCalendar, endCalendar) && (flags & FORMAT_NO_MONTH_DAY) != 0) {
		flags &= (~FORMAT_SHOW_WEEKDAY);
		flags &= (~FORMAT_SHOW_TIME);
		}

		if ((flags & (FORMAT_SHOW_DATE \| FORMAT_SHOW_TIME \| FORMAT_SHOW_WEEKDAY)) == 0) {
		flags \|= FORMAT_SHOW_DATE;
		}

		// If we've been asked to show the date, work out whether we think we should show the year.
		if ((flags & FORMAT_SHOW_DATE) != 0) {
		if ((flags & FORMAT_SHOW_YEAR) != 0) {
		// The caller explicitly wants us to show the year.
		} else if ((flags & FORMAT_NO_YEAR) != 0) {
		// The caller explicitly doesn't want us to show the year, even if we otherwise would.
		} else if (!fallInSameYear(startCalendar, endCalendar) \|\| !isThisYear(startCalendar)) {
		flags \|= FORMAT_SHOW_YEAR;
		}
		}

		StringBuilder builder = new StringBuilder();
		if ((flags & (FORMAT_SHOW_DATE \| FORMAT_NO_MONTH_DAY)) != 0) {
		if ((flags & FORMAT_SHOW_YEAR) != 0) {
		builder.append("y");
		}
		builder.append(monthPart);
		if ((flags & FORMAT_NO_MONTH_DAY) == 0) {
		builder.append("d");
		}
		}
		if ((flags & FORMAT_SHOW_WEEKDAY) != 0) {
		builder.append(weekPart);
		}
		if ((flags & FORMAT_SHOW_TIME) != 0) {
		builder.append(timePart);
		}
		return builder.toString();
		}

		public static int dayDistance(Calendar c1, Calendar c2) {
		return c2.get(Calendar.JULIAN_DAY) - c1.get(Calendar.JULIAN_DAY);
		}

		/**
		* Returns whether the argument will be displayed as if it were midnight, using any of the
		* skeletons provided by {@link #toSkeleton}.
		*/
		public static boolean isDisplayMidnightUsingSkeleton(Calendar c) {
		// All the skeletons returned by toSkeleton have minute precision (they may abbreviate 4:00 PM
		// to 4 PM but will still show the following minute as 4:01 PM).
		return c.get(Calendar.HOUR_OF_DAY) == 0 && c.get(Calendar.MINUTE) == 0;
		}

		private static boolean onTheHour(Calendar c) {
		return c.get(Calendar.MINUTE) == 0 && c.get(Calendar.SECOND) == 0;
		}

		private static boolean fallOnDifferentDates(Calendar c1, Calendar c2) {
		return c1.get(Calendar.YEAR) != c2.get(Calendar.YEAR) \|\|
		c1.get(Calendar.MONTH) != c2.get(Calendar.MONTH) \|\|
		c1.get(Calendar.DAY_OF_MONTH) != c2.get(Calendar.DAY_OF_MONTH);
		}

		private static boolean fallInSameMonth(Calendar c1, Calendar c2) {
		return c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH);
		}

		private static boolean fallInSameYear(Calendar c1, Calendar c2) {
		return c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR);
		}

		private static boolean isThisYear(Calendar c) {
		Calendar now = (Calendar) c.clone();
		now.setTimeInMillis(System.currentTimeMillis());
		return c.get(Calendar.YEAR) == now.get(Calendar.YEAR);
		}
		}

core/java/android/text/format/RelativeDateTimeFormatter.java

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core/tests/coretests/src/android/text/format/RelativeDateTimeFormatterTest.java

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