| /* |
| * Copyright (C) 2006 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.webkit; |
| |
| import android.content.Context; |
| import android.content.res.Resources; |
| |
| import java.util.Calendar; |
| import java.util.Locale; |
| |
| import libcore.icu.LocaleData; |
| |
| /** |
| * Sorts dates into the following groups: |
| * Today |
| * Yesterday |
| * seven days ago |
| * one month ago |
| * older than a month ago |
| */ |
| |
| public class DateSorter { |
| |
| private static final String LOGTAG = "webkit"; |
| |
| /** must be >= 3 */ |
| public static final int DAY_COUNT = 5; |
| |
| private long [] mBins = new long[DAY_COUNT-1]; |
| private String [] mLabels = new String[DAY_COUNT]; |
| |
| private static final int NUM_DAYS_AGO = 7; |
| |
| /** |
| * @param context Application context |
| */ |
| public DateSorter(Context context) { |
| Resources resources = context.getResources(); |
| |
| Calendar c = Calendar.getInstance(); |
| beginningOfDay(c); |
| |
| // Create the bins |
| mBins[0] = c.getTimeInMillis(); // Today |
| c.add(Calendar.DAY_OF_YEAR, -1); |
| mBins[1] = c.getTimeInMillis(); // Yesterday |
| c.add(Calendar.DAY_OF_YEAR, -(NUM_DAYS_AGO - 1)); |
| mBins[2] = c.getTimeInMillis(); // Five days ago |
| c.add(Calendar.DAY_OF_YEAR, NUM_DAYS_AGO); // move back to today |
| c.add(Calendar.MONTH, -1); |
| mBins[3] = c.getTimeInMillis(); // One month ago |
| |
| // build labels |
| Locale locale = resources.getConfiguration().locale; |
| if (locale == null) { |
| locale = Locale.getDefault(); |
| } |
| LocaleData localeData = LocaleData.get(locale); |
| mLabels[0] = localeData.today; |
| mLabels[1] = localeData.yesterday; |
| |
| int resId = com.android.internal.R.plurals.last_num_days; |
| String format = resources.getQuantityString(resId, NUM_DAYS_AGO); |
| mLabels[2] = String.format(format, NUM_DAYS_AGO); |
| |
| mLabels[3] = context.getString(com.android.internal.R.string.last_month); |
| mLabels[4] = context.getString(com.android.internal.R.string.older); |
| } |
| |
| /** |
| * @param time time since the Epoch in milliseconds, such as that |
| * returned by Calendar.getTimeInMillis() |
| * @return an index from 0 to (DAY_COUNT - 1) that identifies which |
| * date bin this date belongs to |
| */ |
| public int getIndex(long time) { |
| int lastDay = DAY_COUNT - 1; |
| for (int i = 0; i < lastDay; i++) { |
| if (time > mBins[i]) return i; |
| } |
| return lastDay; |
| } |
| |
| /** |
| * @param index date bin index as returned by getIndex() |
| * @return string label suitable for display to user |
| */ |
| public String getLabel(int index) { |
| if (index < 0 || index >= DAY_COUNT) return ""; |
| return mLabels[index]; |
| } |
| |
| |
| /** |
| * @param index date bin index as returned by getIndex() |
| * @return date boundary at given index |
| */ |
| public long getBoundary(int index) { |
| int lastDay = DAY_COUNT - 1; |
| // Error case |
| if (index < 0 || index > lastDay) index = 0; |
| // Since this provides a lower boundary on dates that will be included |
| // in the given bin, provide the smallest value |
| if (index == lastDay) return Long.MIN_VALUE; |
| return mBins[index]; |
| } |
| |
| /** |
| * Calcuate 12:00am by zeroing out hour, minute, second, millisecond |
| */ |
| private void beginningOfDay(Calendar c) { |
| c.set(Calendar.HOUR_OF_DAY, 0); |
| c.set(Calendar.MINUTE, 0); |
| c.set(Calendar.SECOND, 0); |
| c.set(Calendar.MILLISECOND, 0); |
| } |
| } |