19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.util; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.Calendar; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helps answer common questions that come up when displaying a month in a 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6 row calendar grid format. 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Not thread safe. 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class MonthDisplayHelper { 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // display pref 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final int mWeekStartDay; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // holds current month, year, helps compute display 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Calendar mCalendar; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // cached computed stuff that helps with display 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mNumDaysInMonth; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mNumDaysInPrevMonth; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mOffset; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param year The year. 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param month The month. 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param weekStartDay What day of the week the week should start. 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MonthDisplayHelper(int year, int month, int weekStartDay) { 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (weekStartDay < Calendar.SUNDAY || weekStartDay > Calendar.SATURDAY) { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException(); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mWeekStartDay = weekStartDay; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar = Calendar.getInstance(); 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.set(Calendar.YEAR, year); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.set(Calendar.MONTH, month); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.set(Calendar.DAY_OF_MONTH, 1); 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.set(Calendar.HOUR_OF_DAY, 0); 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.set(Calendar.MINUTE, 0); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.set(Calendar.SECOND, 0); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.getTimeInMillis(); 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recalculate(); 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MonthDisplayHelper(int year, int month) { 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(year, month, Calendar.SUNDAY); 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getYear() { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCalendar.get(Calendar.YEAR); 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getMonth() { 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCalendar.get(Calendar.MONTH); 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getWeekStartDay() { 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mWeekStartDay; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The first day of the month using a constants such as 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link java.util.Calendar#SUNDAY}. 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getFirstDayOfMonth() { 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mCalendar.get(Calendar.DAY_OF_WEEK); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The number of days in the month. 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getNumberOfDaysInMonth() { 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mNumDaysInMonth; 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The offset from displaying everything starting on the very first 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * box. For example, if the calendar is set to display the first day of 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the week as Sunday, and the month starts on a Wednesday, the offset is 3. 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getOffset() { 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mOffset; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param row Which row (0-5). 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the digits of the month to display in one 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * of the 6 rows of a calendar month display. 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int[] getDigitsForRow(int row) { 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (row < 0 || row > 5) { 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("row " + row 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + " out of range (0-5)"); 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int [] result = new int[7]; 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int column = 0; column < 7; column++) { 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result[column] = getDayAt(row, column); 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return result; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param row The row, 0-5, starting from the top. 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param column The column, 0-6, starting from the left. 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return The day at a particular row, column 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getDayAt(int row, int column) { 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (row == 0 && column < mOffset) { 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mNumDaysInPrevMonth + column - mOffset + 1; 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int day = 7 * row + column - mOffset + 1; 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (day > mNumDaysInMonth) ? 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project day - mNumDaysInMonth : day; 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Which row day is in. 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getRowOf(int day) { 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (day + mOffset - 1) / 7; 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Which column day is in. 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getColumnOf(int day) { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (day + mOffset - 1) % 7; 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Decrement the month. 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void previousMonth() { 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.add(Calendar.MONTH, -1); 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recalculate(); 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Increment the month. 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void nextMonth() { 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.add(Calendar.MONTH, 1); 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project recalculate(); 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return Whether the row and column fall within the month. 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean isWithinCurrentMonth(int row, int column) { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (row < 0 || column < 0 || row > 5 || column > 6) { 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (row == 0 && column < mOffset) { 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int day = 7 * row + column - mOffset + 1; 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (day > mNumDaysInMonth) { 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // helper method that recalculates cached values based on current month / year 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void recalculate() { 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNumDaysInMonth = mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.add(Calendar.MONTH, -1); 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mNumDaysInPrevMonth = mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCalendar.add(Calendar.MONTH, 1); 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int firstDayOfMonth = getFirstDayOfMonth(); 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offset = firstDayOfMonth - mWeekStartDay; 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (offset < 0) { 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset += 7; 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOffset = offset; 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 214