refactor calendar view and adapter

This commit is contained in:
ilia.kurtov 2016-03-17 10:15:26 +03:00
parent bd167b7b1e
commit 5fd04e4f9d
2 changed files with 484 additions and 444 deletions

View File

@ -1,444 +0,0 @@
/*
* Copyright (c) 2015 RoboSwag (Gavriil Sitnikov, Vsevolod Ivanov)
*
* This file is part of RoboSwag library.
*
* 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 ru.touchin.roboswag.components.utils;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
/**
* Created by Ilia Kurtov on 11.03.2016.
* //TODO: fill description
*/
public abstract class CalendarAdapter<TDayViewHolder extends RecyclerView.ViewHolder, THeaderViewHolder extends RecyclerView.ViewHolder,
TEmptyViewHolder extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int HEADER_ITEM_TYPE = 0;
private static final int EMPTY_ITEM_TYPE = 1;
private static final int DAY_ITEM_TYPE = 2;
public static final int DAYS_IN_WEEK = 7;
public static final int MONTHS_IN_YEAR = 12;
public static final long ONE_DAY_LENGTH = TimeUnit.DAYS.toMillis(1);
private List<CalendarItem> calendarItems;
@Nullable
private Integer startSelectionPosition;
@Nullable
private Integer endSelectionPosition;
@NonNull
private final Context context;
private String[] monthsNames = null;
protected CalendarAdapter(@NonNull final Context context, @Nullable final String... monthsNames) {
this.context = context;
if (monthsNames != null && monthsNames.length == MONTHS_IN_YEAR) {
this.monthsNames = monthsNames;
}
}
public void setRange(@NonNull final Calendar startDate, @NonNull final Calendar endDate) {
fillRanges(getCleanDate(startDate), getCleanDate(endDate));
getItemCount();
}
@NonNull
protected Context getContext() {
return context;
}
public void setSelectedRange(@Nullable final Date startSelectionDate, @Nullable final Date endSelectionDate) {
if (startSelectionDate != null) {
startSelectionPosition = findPositionByDate(startSelectionDate.getTime() / ONE_DAY_LENGTH);
}
if (endSelectionDate != null) {
endSelectionPosition = findPositionByDate(endSelectionDate.getTime() / ONE_DAY_LENGTH);
}
notifySelectedDaysChanged();
}
private void notifySelectedDaysChanged() {
if (startSelectionPosition == null && endSelectionPosition == null) {
return;
}
if (startSelectionPosition == null) {
notifyItemRangeChanged(endSelectionPosition, 1);
return;
}
if (endSelectionPosition == null) {
notifyItemRangeChanged(startSelectionPosition, 1);
return;
}
notifyItemRangeChanged(startSelectionPosition, endSelectionPosition - startSelectionPosition);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
switch (viewType) {
case HEADER_ITEM_TYPE:
return createHeaderViewHolder(parent);
case EMPTY_ITEM_TYPE:
return createEmptyViewHolder(parent);
case DAY_ITEM_TYPE:
return createDayViewHolder(parent);
default:
return null;
}
}
protected abstract THeaderViewHolder createHeaderViewHolder(final ViewGroup parent);
protected abstract TEmptyViewHolder createEmptyViewHolder(final ViewGroup parent);
protected abstract TDayViewHolder createDayViewHolder(final ViewGroup parent);
protected abstract void bindHeaderItem(@NonNull final THeaderViewHolder viewHolder, @NonNull final String monthName);
protected abstract void bindEmptyItem(@NonNull final TEmptyViewHolder viewHolder, @NonNull final CalendarState state);
protected abstract void bindDayItem(@NonNull final TDayViewHolder viewHolder,
@NonNull final String day,
@NonNull final Date date,
@NonNull final CalendarState state);
@Override
@SuppressWarnings("unchecked")
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
final CalendarItem calendarItem = find(position);
if (calendarItem instanceof CalendarHeaderItem) {
final StaggeredGridLayoutManager.LayoutParams layoutParams =
new StaggeredGridLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.setFullSpan(true);
holder.itemView.setLayoutParams(layoutParams);
final String monthName;
if (monthsNames != null) {
monthName = monthsNames[((CalendarHeaderItem) calendarItem).getMonth()];
} else {
monthName = String.valueOf(((CalendarHeaderItem) calendarItem).getMonth());
}
bindHeaderItem((THeaderViewHolder) holder, monthName);
} else if (calendarItem instanceof CalendarEmptyItem) {
if (startSelectionPosition != null && endSelectionPosition != null
&& position >= startSelectionPosition && position <= endSelectionPosition) {
bindEmptyItem((TEmptyViewHolder) holder, CalendarState.SELECTED_MIDDLE);
} else {
bindEmptyItem((TEmptyViewHolder) holder, CalendarState.NOT_SELECTED);
}
} else if (calendarItem instanceof CalendarDayItem) {
final String currentDay = String.valueOf(((CalendarDayItem) calendarItem).getPositionOfFirstDay()
+ position - calendarItem.getStartRange());
final Date currentDate = new Date((((CalendarDayItem) calendarItem).getDateOfFirstDay() + position - calendarItem.getStartRange()) * ONE_DAY_LENGTH);
if (startSelectionPosition != null && position == startSelectionPosition) {
if (endSelectionPosition == null || endSelectionPosition.equals(startSelectionPosition)) {
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, CalendarState.SELECTED_ONE_ONLY);
return;
}
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, CalendarState.SELECTED_FIRST);
return;
}
if (endSelectionPosition != null && position == endSelectionPosition) {
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, CalendarState.SELECTED_LAST);
return;
}
if (startSelectionPosition != null && endSelectionPosition != null && position >= startSelectionPosition && position <= endSelectionPosition) {
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, CalendarState.SELECTED_MIDDLE);
return;
}
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, CalendarState.NOT_SELECTED);
}
}
@Override
public int getItemViewType(final int position) {
final CalendarItem calendarItem = find(position);
if (calendarItem instanceof CalendarHeaderItem) {
return HEADER_ITEM_TYPE;
} else if (calendarItem instanceof CalendarEmptyItem) {
return EMPTY_ITEM_TYPE;
} else if (calendarItem instanceof CalendarDayItem) {
return DAY_ITEM_TYPE;
}
return super.getItemViewType(position);
}
@Nullable
public CalendarItem find(final long position) {
if (calendarItems != null) {
int low = 0;
int high = calendarItems.size() - 1;
while (true) {
final int mid = (low + high) / 2;
if (position < calendarItems.get(mid).getStartRange()) {
if (mid == 0 || position > calendarItems.get(mid - 1).getEndRange()) {
break;
}
high = mid - 1;
} else if (position > calendarItems.get(mid).getEndRange()) {
if (mid == calendarItems.size() || position < calendarItems.get(mid + 1).getStartRange()) {
break;
}
low = mid + 1;
} else {
return calendarItems.get(mid);
}
}
}
return null;
}
@Nullable
public Integer findPositionByDate(final long date) {
if (calendarItems != null) {
int low = 0;
int high = calendarItems.size() - 1;
int addition = 0;
float count = 0;
while (true) {
final int mid = (low + high) / 2 + addition;
if (calendarItems.get(mid) instanceof CalendarDayItem) {
if (date < ((CalendarDayItem) calendarItems.get(mid)).getDateOfFirstDay()) {
if (mid == 0) {
break;
}
high = mid - 1;
} else {
final long endDate = ((CalendarDayItem) calendarItems.get(mid)).getDateOfFirstDay() +
calendarItems.get(mid).getEndRange() - calendarItems.get(mid).getStartRange();
if (date > endDate) {
if (mid == calendarItems.size()) {
break;
}
low = mid + 1;
} else {
return (int) (calendarItems.get(mid).getStartRange()
+ date - ((CalendarDayItem) calendarItems.get(mid)).getDateOfFirstDay());
}
}
count = 0;
addition = 0;
} else {
count++;
addition = ((int) Math.ceil(count / 2)) * ((int) (StrictMath.pow(-1, (count - 1))));
}
}
}
return null;
}
@Override
public int getItemCount() {
return calendarItems.isEmpty() ? 0 : calendarItems.get(calendarItems.size() - 1).getEndRange();
}
private void fillRanges(@NonNull final Calendar startDate, @NonNull final Calendar endDate) {
calendarItems = new ArrayList<>();
final Calendar calendar = Calendar.getInstance(Locale.getDefault());
calendar.setTime(startDate.getTime());
calendarItems.add(new CalendarHeaderItem(calendar.get(Calendar.MONTH), 0, 0));
int shift = 1;
final int totalDaysCount = (int) ((endDate.getTimeInMillis() - startDate.getTimeInMillis()) / ONE_DAY_LENGTH + 1);
long firstRangeDate = calendar.getTimeInMillis() / ONE_DAY_LENGTH + 1;
int firstRange = calendar.get(Calendar.DAY_OF_MONTH) - 1;
int daysEnded = 0;
shift += getFirstDateStart(startDate);
if (shift > 1) {
calendarItems.add(new CalendarEmptyItem(1, shift - 1));
}
while (true) {
final int daysInCurrentMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
if ((daysEnded + (daysInCurrentMonth - firstRange)) <= totalDaysCount) {
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
calendar.setTime(new Date(calendar.getTimeInMillis() + ONE_DAY_LENGTH));
final int firstDayInWeek = getFirstDateStart(calendar);
calendarItems.add(new CalendarDayItem(firstRangeDate, firstRange + 1,
shift + daysEnded, shift + daysEnded + (daysInCurrentMonth - firstRange) - 1));
daysEnded += daysInCurrentMonth - firstRange;
if (daysEnded == totalDaysCount) {
return;
}
firstRangeDate = calendar.getTimeInMillis() / ONE_DAY_LENGTH + 1;
firstRange = 0;
if (firstDayInWeek != 0) {
calendarItems.add(new CalendarEmptyItem(shift + daysEnded, shift + daysEnded + (DAYS_IN_WEEK - firstDayInWeek - 1)));
shift += (DAYS_IN_WEEK - firstDayInWeek);
}
calendarItems.add(new CalendarHeaderItem(calendar.get(Calendar.MONTH), shift + daysEnded, shift + daysEnded));
shift += 1;
if (firstDayInWeek != 0) {
calendarItems.add(new CalendarEmptyItem(shift + daysEnded, shift + daysEnded + firstDayInWeek - 1));
shift += firstDayInWeek;
}
} else {
calendarItems.add(new CalendarDayItem(firstRangeDate, firstRange + 1, shift + daysEnded, shift + totalDaysCount));
break;
}
}
}
private static int getFirstDateStart(@NonNull final Calendar calendar) {
int firstDateStart = calendar.get(Calendar.DAY_OF_WEEK) - 2;
if (firstDateStart == -1) {
firstDateStart += DAYS_IN_WEEK;
}
return firstDateStart;
}
@NonNull
private static Calendar getCleanDate(@NonNull final Calendar calendar) {
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar;
}
protected boolean isToday(@NonNull final Date currentDate, @NonNull final Date date) {
return currentDate.getTime() / ONE_DAY_LENGTH == date.getTime() / ONE_DAY_LENGTH;
}
public static class CalendarDayItem implements CalendarItem {
private final long firstDayReal;
private final int firstDayInMonth;
private final int startRange;
private final int endRange;
public CalendarDayItem(final long firstDayReal, final int firstDayInMonth, final int startRange, final int endRange) {
this.firstDayReal = firstDayReal;
this.firstDayInMonth = firstDayInMonth;
this.startRange = startRange;
this.endRange = endRange;
}
public long getDateOfFirstDay() {
return firstDayReal;
}
public int getPositionOfFirstDay() {
return firstDayInMonth;
}
@Override
public int getStartRange() {
return startRange;
}
@Override
public int getEndRange() {
return endRange;
}
}
public static class CalendarEmptyItem implements CalendarItem {
private final int startRange;
private final int endRange;
public CalendarEmptyItem(final int startRange, final int endRange) {
this.startRange = startRange;
this.endRange = endRange;
}
@Override
public int getStartRange() {
return startRange;
}
@Override
public int getEndRange() {
return endRange;
}
}
public static class CalendarHeaderItem implements CalendarItem {
private final int month;
private final int startRange;
private final int endRange;
public CalendarHeaderItem(final int month, final int startRange, final int endRange) {
this.month = month;
this.startRange = startRange;
this.endRange = endRange;
}
public int getMonth() {
return month;
}
@Override
public int getStartRange() {
return startRange;
}
@Override
public int getEndRange() {
return endRange;
}
}
private interface CalendarItem {
int getStartRange();
int getEndRange();
}
public enum CalendarState {
SELECTED_FIRST,
SELECTED_MIDDLE,
SELECTED_LAST,
SELECTED_ONE_ONLY,
NOT_SELECTED
}
}

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@ -0,0 +1,484 @@
/*
* Copyright (c) 2015 RoboSwag (Gavriil Sitnikov, Vsevolod Ivanov)
*
* This file is part of RoboSwag library.
*
* 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 ru.touchin.roboswag.components.utils;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.util.AttributeSet;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
import ru.touchin.roboswag.core.log.Lc;
/**
* Created by Ilia Kurtov on 17.03.2016.
* * //TODO: fill description
*/
public class CalendarView extends RecyclerView {
public static final long ONE_DAY_LENGTH = TimeUnit.DAYS.toMillis(1);
public CalendarView(@NonNull final Context context) {
this(context, null);
}
public CalendarView(@NonNull final Context context, @Nullable final AttributeSet attrs) {
this(context, attrs, 0);
}
public CalendarView(@NonNull final Context context, @Nullable final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
getRecycledViewPool().setMaxRecycledViews(0, 2);
getRecycledViewPool().setMaxRecycledViews(1, 7);
getRecycledViewPool().setMaxRecycledViews(2, 8);
setItemViewCacheSize(0);
}
public void setAdapter(final CalendarAdapter adapter) {
super.setAdapter(adapter);
}
@Override
@Deprecated
public void setAdapter(final Adapter adapter) {
super.setAdapter(adapter);
Lc.assertion("Unsupported adapter class. Use CalendarAdapter instead.");
}
public enum State {
SELECTED_FIRST,
SELECTED_MIDDLE,
SELECTED_LAST,
SELECTED_ONE_ONLY,
NOT_SELECTED
}
private interface CalendarItem {
int getStartRange();
int getEndRange();
}
public abstract static class CalendarAdapter<TDayViewHolder extends RecyclerView.ViewHolder, THeaderViewHolder extends RecyclerView.ViewHolder,
TEmptyViewHolder extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int HEADER_ITEM_TYPE = 0;
private static final int EMPTY_ITEM_TYPE = 1;
private static final int DAY_ITEM_TYPE = 2;
public static final int DAYS_IN_WEEK = 7;
public static final int MONTHS_IN_YEAR = 12;
private List<CalendarItem> calendarItems;
@Nullable
private Integer startSelectionPosition;
@Nullable
private Integer endSelectionPosition;
@NonNull
private final Context context;
private String[] monthsNames = null;
protected CalendarAdapter(@NonNull final Context context, @Nullable final String... monthsNames) {
this.context = context;
if (monthsNames != null && monthsNames.length == MONTHS_IN_YEAR) {
this.monthsNames = monthsNames;
}
}
public void setRange(@NonNull final Calendar startDate, @NonNull final Calendar endDate) {
fillRanges(getCleanDate(startDate), getCleanDate(endDate));
getItemCount();
}
@NonNull
protected Context getContext() {
return context;
}
public void setSelectedRange(@Nullable final Date startSelectionDate, @Nullable final Date endSelectionDate) {
if (startSelectionDate != null) {
startSelectionPosition = findPositionByDate(startSelectionDate.getTime() / ONE_DAY_LENGTH);
}
if (endSelectionDate != null) {
endSelectionPosition = findPositionByDate(endSelectionDate.getTime() / ONE_DAY_LENGTH);
}
notifySelectedDaysChanged();
}
private void notifySelectedDaysChanged() {
if (startSelectionPosition == null && endSelectionPosition == null) {
return;
}
if (startSelectionPosition == null) {
notifyItemRangeChanged(endSelectionPosition, 1);
return;
}
if (endSelectionPosition == null) {
notifyItemRangeChanged(startSelectionPosition, 1);
return;
}
notifyItemRangeChanged(startSelectionPosition, endSelectionPosition - startSelectionPosition);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
switch (viewType) {
case HEADER_ITEM_TYPE:
return createHeaderViewHolder(parent);
case EMPTY_ITEM_TYPE:
return createEmptyViewHolder(parent);
case DAY_ITEM_TYPE:
return createDayViewHolder(parent);
default:
return null;
}
}
protected abstract THeaderViewHolder createHeaderViewHolder(final ViewGroup parent);
protected abstract TEmptyViewHolder createEmptyViewHolder(final ViewGroup parent);
protected abstract TDayViewHolder createDayViewHolder(final ViewGroup parent);
protected abstract void bindHeaderItem(@NonNull final THeaderViewHolder viewHolder, @NonNull final String monthName);
protected abstract void bindEmptyItem(@NonNull final TEmptyViewHolder viewHolder, @NonNull final State state);
protected abstract void bindDayItem(@NonNull final TDayViewHolder viewHolder,
@NonNull final String day,
@NonNull final Date date,
@NonNull final State state);
@Override
@SuppressWarnings("unchecked")
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
final CalendarItem calendarItem = find(position);
if (calendarItem instanceof CalendarHeaderItem) {
final StaggeredGridLayoutManager.LayoutParams layoutParams =
new StaggeredGridLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.setFullSpan(true);
holder.itemView.setLayoutParams(layoutParams);
final String monthName;
if (monthsNames != null) {
monthName = monthsNames[((CalendarHeaderItem) calendarItem).getMonth()];
} else {
monthName = String.valueOf(((CalendarHeaderItem) calendarItem).getMonth());
}
bindHeaderItem((THeaderViewHolder) holder, monthName);
} else if (calendarItem instanceof CalendarEmptyItem) {
if (startSelectionPosition != null && endSelectionPosition != null
&& position >= startSelectionPosition && position <= endSelectionPosition) {
bindEmptyItem((TEmptyViewHolder) holder, State.SELECTED_MIDDLE);
} else {
bindEmptyItem((TEmptyViewHolder) holder, State.NOT_SELECTED);
}
} else if (calendarItem instanceof CalendarDayItem) {
final String currentDay = String.valueOf(((CalendarDayItem) calendarItem).getPositionOfFirstDay()
+ position - calendarItem.getStartRange());
final Date currentDate = new Date((((CalendarDayItem) calendarItem).getDateOfFirstDay() + position - calendarItem.getStartRange()) * ONE_DAY_LENGTH);
if (startSelectionPosition != null && position == startSelectionPosition) {
if (endSelectionPosition == null || endSelectionPosition.equals(startSelectionPosition)) {
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, State.SELECTED_ONE_ONLY);
return;
}
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, State.SELECTED_FIRST);
return;
}
if (endSelectionPosition != null && position == endSelectionPosition) {
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, State.SELECTED_LAST);
return;
}
if (startSelectionPosition != null && endSelectionPosition != null && position >= startSelectionPosition && position <= endSelectionPosition) {
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, State.SELECTED_MIDDLE);
return;
}
bindDayItem((TDayViewHolder) holder, currentDay, currentDate, State.NOT_SELECTED);
}
}
@Override
public int getItemViewType(final int position) {
final CalendarItem calendarItem = find(position);
if (calendarItem instanceof CalendarHeaderItem) {
return HEADER_ITEM_TYPE;
} else if (calendarItem instanceof CalendarEmptyItem) {
return EMPTY_ITEM_TYPE;
} else if (calendarItem instanceof CalendarDayItem) {
return DAY_ITEM_TYPE;
}
return super.getItemViewType(position);
}
@Nullable
public CalendarItem find(final long position) {
if (calendarItems != null) {
int low = 0;
int high = calendarItems.size() - 1;
while (true) {
final int mid = (low + high) / 2;
if (position < calendarItems.get(mid).getStartRange()) {
if (mid == 0 || position > calendarItems.get(mid - 1).getEndRange()) {
break;
}
high = mid - 1;
} else if (position > calendarItems.get(mid).getEndRange()) {
if (mid == calendarItems.size() || position < calendarItems.get(mid + 1).getStartRange()) {
break;
}
low = mid + 1;
} else {
return calendarItems.get(mid);
}
}
}
return null;
}
@Nullable
public Integer findPositionByDate(final long date) {
if (calendarItems != null) {
int low = 0;
int high = calendarItems.size() - 1;
int addition = 0;
float count = 0;
while (true) {
final int mid = (low + high) / 2 + addition;
if (calendarItems.get(mid) instanceof CalendarDayItem) {
if (date < ((CalendarDayItem) calendarItems.get(mid)).getDateOfFirstDay()) {
if (mid == 0) {
break;
}
high = mid - 1;
} else {
final long endDate = ((CalendarDayItem) calendarItems.get(mid)).getDateOfFirstDay() +
calendarItems.get(mid).getEndRange() - calendarItems.get(mid).getStartRange();
if (date > endDate) {
if (mid == calendarItems.size()) {
break;
}
low = mid + 1;
} else {
return (int) (calendarItems.get(mid).getStartRange()
+ date - ((CalendarDayItem) calendarItems.get(mid)).getDateOfFirstDay());
}
}
count = 0;
addition = 0;
} else {
count++;
addition = ((int) Math.ceil(count / 2)) * ((int) (StrictMath.pow(-1, (count - 1))));
}
}
}
return null;
}
@Override
public int getItemCount() {
return calendarItems.isEmpty() ? 0 : calendarItems.get(calendarItems.size() - 1).getEndRange();
}
private void fillRanges(@NonNull final Calendar startDate, @NonNull final Calendar endDate) {
calendarItems = new ArrayList<>();
final Calendar calendar = Calendar.getInstance(Locale.getDefault());
calendar.setTime(startDate.getTime());
calendarItems.add(new CalendarHeaderItem(calendar.get(Calendar.MONTH), 0, 0));
int shift = 1;
final int totalDaysCount = (int) ((endDate.getTimeInMillis() - startDate.getTimeInMillis()) / ONE_DAY_LENGTH + 1);
long firstRangeDate = calendar.getTimeInMillis() / ONE_DAY_LENGTH + 1;
int firstRange = calendar.get(Calendar.DAY_OF_MONTH) - 1;
int daysEnded = 0;
shift += getFirstDateStart(startDate);
if (shift > 1) {
calendarItems.add(new CalendarEmptyItem(1, shift - 1));
}
while (true) {
final int daysInCurrentMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
if ((daysEnded + (daysInCurrentMonth - firstRange)) <= totalDaysCount) {
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
calendar.setTime(new Date(calendar.getTimeInMillis() + ONE_DAY_LENGTH));
final int firstDayInWeek = getFirstDateStart(calendar);
calendarItems.add(new CalendarDayItem(firstRangeDate, firstRange + 1,
shift + daysEnded, shift + daysEnded + (daysInCurrentMonth - firstRange) - 1));
daysEnded += daysInCurrentMonth - firstRange;
if (daysEnded == totalDaysCount) {
return;
}
firstRangeDate = calendar.getTimeInMillis() / ONE_DAY_LENGTH + 1;
firstRange = 0;
if (firstDayInWeek != 0) {
calendarItems.add(new CalendarEmptyItem(shift + daysEnded, shift + daysEnded + (DAYS_IN_WEEK - firstDayInWeek - 1)));
shift += (DAYS_IN_WEEK - firstDayInWeek);
}
calendarItems.add(new CalendarHeaderItem(calendar.get(Calendar.MONTH), shift + daysEnded, shift + daysEnded));
shift += 1;
if (firstDayInWeek != 0) {
calendarItems.add(new CalendarEmptyItem(shift + daysEnded, shift + daysEnded + firstDayInWeek - 1));
shift += firstDayInWeek;
}
} else {
calendarItems.add(new CalendarDayItem(firstRangeDate, firstRange + 1, shift + daysEnded, shift + totalDaysCount));
break;
}
}
}
private int getFirstDateStart(@NonNull final Calendar calendar) {
int firstDateStart = calendar.get(Calendar.DAY_OF_WEEK) - 2;
if (firstDateStart == -1) {
firstDateStart += DAYS_IN_WEEK;
}
return firstDateStart;
}
@NonNull
private Calendar getCleanDate(@NonNull final Calendar calendar) {
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar;
}
protected boolean isToday(@NonNull final Date currentDate, @NonNull final Date date) {
return currentDate.getTime() / ONE_DAY_LENGTH == date.getTime() / ONE_DAY_LENGTH;
}
public static class CalendarDayItem implements CalendarItem {
private final long firstDayReal;
private final int firstDayInMonth;
private final int startRange;
private final int endRange;
public CalendarDayItem(final long firstDayReal, final int firstDayInMonth, final int startRange, final int endRange) {
this.firstDayReal = firstDayReal;
this.firstDayInMonth = firstDayInMonth;
this.startRange = startRange;
this.endRange = endRange;
}
public long getDateOfFirstDay() {
return firstDayReal;
}
public int getPositionOfFirstDay() {
return firstDayInMonth;
}
@Override
public int getStartRange() {
return startRange;
}
@Override
public int getEndRange() {
return endRange;
}
}
public static class CalendarEmptyItem implements CalendarItem {
private final int startRange;
private final int endRange;
public CalendarEmptyItem(final int startRange, final int endRange) {
this.startRange = startRange;
this.endRange = endRange;
}
@Override
public int getStartRange() {
return startRange;
}
@Override
public int getEndRange() {
return endRange;
}
}
public static class CalendarHeaderItem implements CalendarItem {
private final int month;
private final int startRange;
private final int endRange;
public CalendarHeaderItem(final int month, final int startRange, final int endRange) {
this.month = month;
this.startRange = startRange;
this.endRange = endRange;
}
public int getMonth() {
return month;
}
@Override
public int getStartRange() {
return startRange;
}
@Override
public int getEndRange() {
return endRange;
}
}
}
}