Merge pull request #12 from votruk/feature/adapter-calendar
added calendar adapter
This commit is contained in:
Gavriil
commit
31158c8d42
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/*
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* Copyright (c) 2015 RoboSwag (Gavriil Sitnikov, Vsevolod Ivanov)
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*
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* This file is part of RoboSwag library.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package org.roboswag.components.utils;
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import android.content.Context;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.v7.widget.RecyclerView;
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import android.support.v7.widget.StaggeredGridLayoutManager;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.List;
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import java.util.Locale;
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import java.util.concurrent.TimeUnit;
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/**
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* Created by Ilia Kurtov on 11.03.2016.
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* //TODO: fill description
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*/
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public class CalendarAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
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private static final int HEADER_ITEM_TYPE = 0;
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private static final int EMPTY_ITEM_TYPE = 1;
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private static final int DAY_ITEM_TYPE = 2;
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public static final int DAYS_IN_WEEK = 7;
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public static final long ONE_WEEK_LENGTH = TimeUnit.DAYS.toMillis(7);
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public static final long ONE_DAY_LENGTH = TimeUnit.DAYS.toMillis(1);
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private int shift;
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private int emptyShift;
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private boolean isWeekShifted;
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private boolean isMonthStarted;
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private List<CalendarItem> calendarItems;
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private Calendar startDate;
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private Calendar endDate;
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private final Context context;
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public void setRange(@NonNull final Calendar startDate, @NonNull final Calendar endDate) {
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this.startDate = getCleanDate(startDate);
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this.endDate = getCleanDate(endDate);
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fillRanges();
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getItemCount();
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}
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public CalendarAdapter(@NonNull final Context context) {
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this.context = context;
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}
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@Override
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public RecyclerView.ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
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final TextView view = new TextView(context);
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final RecyclerView.LayoutParams layoutParams = new RecyclerView.LayoutParams(100, 100);
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view.setLayoutParams(layoutParams);
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view.setGravity(Gravity.CENTER);
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switch (viewType) {
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case HEADER_ITEM_TYPE:
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return new HeaderViewHolder(view);
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case EMPTY_ITEM_TYPE:
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return new EmptyViewHolder(view);
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case DAY_ITEM_TYPE:
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return new DayViewHolder(view);
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default:
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return null;
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}
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}
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@Override
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public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
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final CalendarItem calendarItem = find(position);
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if (calendarItem instanceof CalendarHeaderItem) {
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final StaggeredGridLayoutManager.LayoutParams layoutParams =
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new StaggeredGridLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
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layoutParams.setFullSpan(true);
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holder.itemView.setLayoutParams(layoutParams);
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((HeaderViewHolder) holder).bindItem(((CalendarHeaderItem) calendarItem).getMonth());
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} else if (calendarItem instanceof CalendarEmptyItem) {
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((EmptyViewHolder) holder).bindItem();
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} else if (calendarItem instanceof CalendarDayItem) {
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final Calendar calendar = Calendar.getInstance();
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calendar.setTime(new Date((((CalendarDayItem) calendarItem).getFirstDayReal() + (position - calendarItem.getStartRange())) * ONE_DAY_LENGTH));
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((DayViewHolder) holder).bindItem(String.valueOf(calendar.get(Calendar.DAY_OF_MONTH)));
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}
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}
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@Override
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public int getItemViewType(final int position) {
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final CalendarItem calendarItem = find(position);
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if (calendarItem instanceof CalendarHeaderItem) {
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return HEADER_ITEM_TYPE;
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} else if (calendarItem instanceof CalendarEmptyItem) {
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return EMPTY_ITEM_TYPE;
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} else if (calendarItem instanceof CalendarDayItem) {
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return DAY_ITEM_TYPE;
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}
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return super.getItemViewType(position);
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}
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@Nullable
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public CalendarItem find(final long position) {
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if (calendarItems != null) {
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int low = 0;
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int high = calendarItems.size() - 1;
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while (true) {
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final int mid = (low + high) / 2;
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if (position < calendarItems.get(mid).getStartRange()) {
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if (mid == 0 || position > calendarItems.get(mid - 1).getEndRange()) {
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break;
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}
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high = mid - 1;
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} else if (position > calendarItems.get(mid).getEndRange()) {
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if (mid == calendarItems.size() || position < calendarItems.get(mid + 1).getStartRange()) {
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break;
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}
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low = mid + 1;
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} else {
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return calendarItems.get(mid);
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}
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}
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}
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return null;
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}
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@Override
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public int getItemCount() {
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return calendarItems.isEmpty() ? 0 : calendarItems.get(calendarItems.size() - 1).getEndRange();
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}
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private void fillRanges() {
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calendarItems = new ArrayList<>();
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final Calendar calendar = Calendar.getInstance(Locale.getDefault());
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calendar.setTime(startDate.getTime());
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calendarItems.add(new CalendarHeaderItem(calendar.get(Calendar.MONTH), 0, 0));
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int shift = 1;
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final int totalDaysCount = (int) ((endDate.getTimeInMillis() - startDate.getTimeInMillis()) / ONE_DAY_LENGTH + 1);
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long firstRangeDate = calendar.getTimeInMillis() / ONE_DAY_LENGTH + 1;
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int firstRange = calendar.get(Calendar.DAY_OF_MONTH) - 1;
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int daysEnded = 0;
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shift += getFirstDateStart(startDate);
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if (shift > 1) {
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calendarItems.add(new CalendarEmptyItem(1, shift - 1));
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}
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while (true) {
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final int daysInCurrentMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
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if ((daysEnded + (daysInCurrentMonth - firstRange)) <= totalDaysCount) {
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calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
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calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
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calendar.setTime(new Date(calendar.getTimeInMillis() + ONE_DAY_LENGTH));
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final int firstDayInWeek = getFirstDateStart(calendar);
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calendarItems.add(new CalendarDayItem(firstRangeDate, shift + daysEnded, shift + daysEnded + (daysInCurrentMonth - firstRange) - 1));
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daysEnded += daysInCurrentMonth - firstRange;
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firstRangeDate = calendar.getTimeInMillis() / ONE_DAY_LENGTH + 1;
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firstRange = 0;
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if (firstDayInWeek != 0) {
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calendarItems.add(new CalendarEmptyItem(shift + daysEnded, shift + daysEnded + (DAYS_IN_WEEK - firstDayInWeek - 1)));
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shift += (DAYS_IN_WEEK - firstDayInWeek);
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}
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calendarItems.add(new CalendarHeaderItem(calendar.get(Calendar.MONTH), shift + daysEnded, shift + daysEnded));
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shift += 1;
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if (firstDayInWeek != 0) {
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calendarItems.add(new CalendarEmptyItem(shift + daysEnded, shift + daysEnded + firstDayInWeek - 1));
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shift += firstDayInWeek;
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}
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} else {
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calendarItems.add(new CalendarDayItem(firstRangeDate, shift + daysEnded, shift + totalDaysCount));
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break;
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}
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}
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}
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private static int getFirstDateStart(@NonNull final Calendar calendar) {
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int firstDateStart = calendar.get(Calendar.DAY_OF_WEEK) - 2;
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if (firstDateStart == -1) {
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firstDateStart += DAYS_IN_WEEK;
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}
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return firstDateStart;
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}
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@NonNull
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private static Calendar getCleanDate(@NonNull final Calendar calendar) {
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calendar.set(Calendar.HOUR_OF_DAY, 0);
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calendar.set(Calendar.MINUTE, 0);
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calendar.set(Calendar.SECOND, 0);
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calendar.set(Calendar.MILLISECOND, 0);
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return calendar;
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}
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public static class DayViewHolder extends RecyclerView.ViewHolder {
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private final TextView dayText;
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public DayViewHolder(final View itemView) {
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super(itemView);
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dayText = (TextView) itemView;
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}
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public void bindItem(@NonNull final String day) {
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dayText.setText(day);
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}
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}
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public static class EmptyViewHolder extends RecyclerView.ViewHolder {
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private final TextView dayText;
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public EmptyViewHolder(final View itemView) {
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super(itemView);
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dayText = (TextView) itemView;
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}
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public void bindItem() {
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dayText.setText(null);
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}
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}
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public static class HeaderViewHolder extends RecyclerView.ViewHolder {
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private final TextView dayText;
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public HeaderViewHolder(final View itemView) {
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super(itemView);
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dayText = (TextView) itemView;
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}
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public void bindItem(final int monthName) {
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dayText.setText(String.valueOf(monthName));
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}
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}
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public static class CalendarDayItem implements CalendarItem {
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private final long firstDayReal;
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private final int startRange;
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private final int endRange;
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public CalendarDayItem(final long firstDayReal, final int startRange, final int endRange) {
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this.firstDayReal = firstDayReal;
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this.startRange = startRange;
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this.endRange = endRange;
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}
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public long getFirstDayReal() {
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return firstDayReal;
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}
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@Override
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public int getStartRange() {
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return startRange;
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}
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@Override
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public int getEndRange() {
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return endRange;
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}
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}
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public static class CalendarEmptyItem implements CalendarItem {
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private final int startRange;
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private final int endRange;
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public CalendarEmptyItem(final int startRange, final int endRange) {
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this.startRange = startRange;
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this.endRange = endRange;
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}
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@Override
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public int getStartRange() {
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return startRange;
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}
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@Override
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public int getEndRange() {
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return endRange;
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}
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}
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public static class CalendarHeaderItem implements CalendarItem {
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private final int month;
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private final int startRange;
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private final int endRange;
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public CalendarHeaderItem(final int month, final int startRange, final int endRange) {
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this.month = month;
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this.startRange = startRange;
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this.endRange = endRange;
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}
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public int getMonth() {
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return month;
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}
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@Override
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public int getStartRange() {
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return startRange;
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}
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@Override
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public int getEndRange() {
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return endRange;
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}
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}
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private interface CalendarItem {
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int getStartRange();
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int getEndRange();
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}
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}
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