| 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.content.browser.input; |
| 6 | |
| 7 | import android.content.Context; |
| 8 | |
| 9 | import java.util.Calendar; |
| 10 | |
| 11 | import org.chromium.content.R; |
| 12 | |
| 13 | // This class is heavily based on android.widget.DatePicker. |
| 14 | public class WeekPicker extends TwoFieldDatePicker { |
| 15 | |
| 16 | public WeekPicker(Context context, long minValue, long maxValue) { |
| 17 | super(context, minValue, maxValue); |
| 18 | |
| 19 | getPositionInYearSpinner().setContentDescription( |
| 20 | getResources().getString(R.string.accessibility_date_picker_week)); |
| 21 | |
| 22 | // initialize to current date |
| 23 | Calendar cal = Calendar.getInstance(); |
| 24 | cal.setFirstDayOfWeek(Calendar.MONDAY); |
| 25 | cal.setMinimalDaysInFirstWeek(4); |
| 26 | cal.setTimeInMillis(System.currentTimeMillis()); |
| 27 | init(getISOWeekYearForDate(cal), getWeekForDate(cal), null); |
| 28 | } |
| 29 | |
| 30 | private Calendar createDateFromWeek(int year, int week) { |
| 31 | Calendar date = Calendar.getInstance(); |
| 32 | date.clear(); |
| 33 | date.setFirstDayOfWeek(Calendar.MONDAY); |
| 34 | date.setMinimalDaysInFirstWeek(4); |
| 35 | date.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); |
| 36 | date.set(Calendar.YEAR, year); |
| 37 | date.set(Calendar.WEEK_OF_YEAR, week); |
| 38 | return date; |
| 39 | } |
| 40 | |
| 41 | @Override |
| 42 | protected Calendar createDateFromValue(long value) { |
| 43 | Calendar date = Calendar.getInstance(); |
| 44 | date.clear(); |
| 45 | date.setFirstDayOfWeek(Calendar.MONDAY); |
| 46 | date.setMinimalDaysInFirstWeek(4); |
| 47 | date.setTimeInMillis(value); |
| 48 | return date; |
| 49 | } |
| 50 | |
| 51 | public static int getISOWeekYearForDate(Calendar date) { |
| 52 | int year = date.get(Calendar.YEAR); |
| 53 | int month = date.get(Calendar.MONTH); |
| 54 | int week = date.get(Calendar.WEEK_OF_YEAR); |
| 55 | if (month == 0 && week > 51) { |
| 56 | year--; |
| 57 | } else if (month == 11 && week == 1) { |
| 58 | year++; |
| 59 | } |
| 60 | return year; |
| 61 | } |
| 62 | |
| 63 | public static int getWeekForDate(Calendar date) { |
| 64 | return date.get(Calendar.WEEK_OF_YEAR); |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | protected void setCurrentDate(int year, int week) { |
| 69 | Calendar date = createDateFromWeek(year, week); |
| 70 | if (date.before(getMinDate())) { |
| 71 | setCurrentDate(getMinDate()); |
| 72 | } else if (date.after(getMaxDate())) { |
| 73 | setCurrentDate(getMaxDate()); |
| 74 | } else { |
| 75 | setCurrentDate(date); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | private int getNumberOfWeeks() { |
| 80 | // Create a date in the middle of the year, where the week year matches the year. |
| 81 | Calendar date = createDateFromWeek(getYear(), 20); |
| 82 | return date.getActualMaximum(Calendar.WEEK_OF_YEAR); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * @return The selected year. |
| 87 | */ |
| 88 | @Override |
| 89 | public int getYear() { |
| 90 | return getISOWeekYearForDate(getCurrentDate()); |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * @return The selected week. |
| 95 | */ |
| 96 | public int getWeek() { |
| 97 | return getWeekForDate(getCurrentDate()); |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public int getPositionInYear() { |
| 102 | return getWeek(); |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | protected int getMaxYear() { |
| 107 | return getISOWeekYearForDate(getMaxDate()); |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | protected int getMinYear() { |
| 112 | return getISOWeekYearForDate(getMinDate()); |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | protected int getMaxPositionInYear() { |
| 117 | if (getYear() == getISOWeekYearForDate(getMaxDate())) { |
| 118 | return getWeekForDate(getMaxDate()); |
| 119 | } |
| 120 | return getNumberOfWeeks(); |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | protected int getMinPositionInYear() { |
| 125 | if (getYear() == getISOWeekYearForDate(getMinDate())) { |
| 126 | return getWeekForDate(getMinDate()); |
| 127 | } |
| 128 | return 1; |
| 129 | } |
| 130 | } |