File indexing completed on 2024-04-28 04:40:43

 // SPDX-FileCopyrightText: 2021 Claudio Cambra <claudio.cambra@gmail.com>
 // SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <QMetaEnum>
 #include <cmath>
 #include "infinitecalendarviewmodel.h"
 
 InfiniteCalendarViewModel::InfiniteCalendarViewModel(QObject *parent)
     : QAbstractListModel(parent)
 {
 }
 
 void InfiniteCalendarViewModel::classBegin()
 {
 
 }
 
 void InfiniteCalendarViewModel::componentComplete()
 {
     m_isCompleted = true;
     setup();
 }
 
 void InfiniteCalendarViewModel::setup()
 {
     if (!m_isCompleted) {
         return;
     }
 
     if (!m_currentDate.isValid()) {
         return;
     }
 
     switch (m_scale) {
     case WeekScale: {
         QDateTime firstDay = m_currentDate.addDays(-m_currentDate.date().dayOfWeek() + m_locale.firstDayOfWeek());
         // We create dates before and after where our view will start from (which is m_currentDate)
         firstDay = firstDay.addDays((-m_datesToAdd * 7) / 2);
 
         addWeekDates(true, firstDay);
         break;
     }
     case MonthScale: {
         QDateTime firstDay(QDate(m_currentDate.date().year(), m_currentDate.date().month(), 1), {});
         firstDay = firstDay.addMonths(-m_datesToAdd / 2);
 
         addMonthDates(true, firstDay);
         break;
     }
     case YearScale: {
         QDateTime firstDay(QDate(m_currentDate.date().year(), m_currentDate.date().month(), 1), {});
         firstDay = firstDay.addYears(-m_datesToAdd / 2);
 
         addYearDates(true, firstDay);
         break;
     }
     case DecadeScale: {
         const int firstYear = ((floor(m_currentDate.date().year() / 10)) * 10) - 1; // E.g. For 2020 have view start at 2019...
         QDateTime firstDay(QDate(firstYear, m_currentDate.date().month(), 1), {});
         firstDay = firstDay.addYears(((-m_datesToAdd * 12) / 2) + 10); // 3 * 4 grid so 12 years, end at 2030, and align for mid index to be current decade
 
         addDecadeDates(true, firstDay);
         break;
     }
     }
 }
 
 QVariant InfiniteCalendarViewModel::data(const QModelIndex &idx, int role) const
 {
     if (!hasIndex(idx.row(), idx.column())) {
         return {};
     }
 
     const QDateTime startDate = m_startDates[idx.row()];
 
     if (m_scale == MonthScale && role != StartDateRole) {
         const QDateTime firstDay = m_firstDayOfMonthDates[idx.row()];
 
         switch (role) {
         case FirstDayOfMonthRole:
             return firstDay.date().startOfDay();
         case SelectedMonthRole:
             return firstDay.date().month();
         case SelectedYearRole:
             return firstDay.date().year();
         default:
             qWarning() << "Unknown role for startdate:" << QMetaEnum::fromType<Roles>().valueToKey(role);
             return {};
         }
     }
 
     switch (role) {
     case StartDateRole:
         return startDate.date().startOfDay();
     case SelectedMonthRole:
         return startDate.date().month();
     case SelectedYearRole:
         return startDate.date().year();
     default:
         qWarning() << "Unknown role for startdate:" << QMetaEnum::fromType<Roles>().valueToKey(role);
         return {};
     }
 }
 
 int InfiniteCalendarViewModel::rowCount(const QModelIndex &parent) const
 {
     Q_UNUSED(parent)
     return m_startDates.length();
 }
 
 QHash<int, QByteArray> InfiniteCalendarViewModel::roleNames() const
 {
     return {
         {StartDateRole, QByteArrayLiteral("startDate")},
         {FirstDayOfMonthRole, QByteArrayLiteral("firstDay")},
         {SelectedMonthRole, QByteArrayLiteral("selectedMonth")},
         {SelectedYearRole, QByteArrayLiteral("selectedYear")},
     };
 }
 
 QDateTime InfiniteCalendarViewModel::currentDate() const
 {
     return m_currentDate;
 }
 
 void InfiniteCalendarViewModel::setCurrentDate(const QDateTime &currentDate)
 {
     m_currentDate = currentDate;
 }
 
 QDateTime InfiniteCalendarViewModel::minimumDate() const
 {
     return m_minimumDate;
 }
 
 void InfiniteCalendarViewModel::setMinimumDate(const QDateTime &minimumDate)
 {
     if (m_minimumDate == minimumDate) {
         return;
     }
     m_minimumDate = minimumDate;
     Q_EMIT minimumDateChanged();
 }
 
 QDateTime InfiniteCalendarViewModel::maximumDate() const
 {
     return m_maximumDate;
 }
 
 void InfiniteCalendarViewModel::setMaximumDate(const QDateTime &maximumDate)
 {
     if (m_maximumDate == maximumDate) {
         return;
     }
     m_maximumDate = maximumDate;
     Q_EMIT maximumDateChanged();
 }
 
 void InfiniteCalendarViewModel::addDates(bool atEnd, const QDateTime startFrom)
 {
     switch (m_scale) {
     case WeekScale:
         addWeekDates(atEnd, startFrom);
         break;
     case MonthScale:
         addMonthDates(atEnd, startFrom);
         break;
     case YearScale:
         addYearDates(atEnd, startFrom);
         break;
     case DecadeScale:
         addDecadeDates(atEnd, startFrom);
         break;
     }
 }
 
 void InfiniteCalendarViewModel::addWeekDates(bool atEnd, const QDateTime &startFrom)
 {
     const int newRow = atEnd ? rowCount() : 0;
 
     beginInsertRows(QModelIndex(), newRow, newRow + m_datesToAdd - 1);
 
     for (int i = 0; i < m_datesToAdd; i++) {
         QDateTime startDate = startFrom.isValid() && i == 0 ? startFrom : atEnd ? m_startDates[rowCount() - 1].addDays(7) : m_startDates[0].addDays(-7);
 
         if (startDate.date().dayOfWeek() != m_locale.firstDayOfWeek()) {
             startDate = startDate.addDays(-startDate.date().dayOfWeek() + m_locale.firstDayOfWeek());
         }
 
         if (atEnd) {
             m_startDates.append(startDate);
         } else {
             m_startDates.insert(0, startDate);
         }
     }
 
     endInsertRows();
 }
 
 void InfiniteCalendarViewModel::addMonthDates(bool atEnd, const QDateTime &startFrom)
 {
     QVector<QDateTime> startDates;
 
     const int newRow = atEnd ? rowCount() : 0;
 
     for (int i = 0; i < m_datesToAdd; i++) {
         QDateTime firstDay;
 
         if (startFrom.isValid() && i == 0) {
             firstDay = startFrom;
         } else if (atEnd) {
             firstDay = m_firstDayOfMonthDates[newRow + startDates.length() - 1].addMonths(1);
         } else {
             firstDay = m_firstDayOfMonthDates[0].addMonths(-1);
         }
 
         QDateTime startDate = firstDay;
 
         startDate = startDate.addDays(-startDate.date().dayOfWeek() + m_locale.firstDayOfWeek());
         if (startDate >= firstDay) {
             startDate = startDate.addDays(-7);
         }
 
         if (atEnd) {
             if (m_maximumDate.isValid() && startDate > m_maximumDate) {
                 break;
             }
             m_firstDayOfMonthDates.append(firstDay);
             startDates.append(startDate);
         } else {
             m_firstDayOfMonthDates.insert(0, firstDay);
             startDates.insert(0, startDate);
         }
     }
 
     beginInsertRows({}, newRow, newRow + startDates.length() - 1);
 
     if (atEnd) {
         m_startDates = m_startDates + startDates;
     } else {
         m_startDates = startDates + m_startDates;
     }
 
     endInsertRows();
 }
 
 void InfiniteCalendarViewModel::addYearDates(bool atEnd, const QDateTime &startFrom)
 {
     const int newRow = atEnd ? rowCount() : 0;
 
     beginInsertRows(QModelIndex(), newRow, newRow + m_datesToAdd - 1);
 
     for (int i = 0; i < m_datesToAdd; i++) {
         QDateTime startDate = startFrom.isValid() && i == 0 ? startFrom : atEnd ? m_startDates[rowCount() - 1].addYears(1) : m_startDates[0].addYears(-1);
 
         if (atEnd) {
             m_startDates.append(startDate);
         } else {
             m_startDates.insert(0, startDate);
         }
     }
 
     endInsertRows();
 }
 
 void InfiniteCalendarViewModel::addDecadeDates(bool atEnd, const QDateTime &startFrom)
 {
     const int newRow = atEnd ? rowCount() : 0;
 
     beginInsertRows(QModelIndex(), newRow, newRow + m_datesToAdd - 1);
 
     for (int i = 0; i < m_datesToAdd; i++) {
         QDateTime startDate = startFrom.isValid() && i == 0 ? startFrom : atEnd ? m_startDates[rowCount() - 1].addYears(10) : m_startDates[0].addYears(-10);
 
         if (atEnd) {
             m_startDates.append(startDate);
         } else {
             m_startDates.insert(0, startDate);
         }
     }
 
     endInsertRows();
 }
 
 int InfiniteCalendarViewModel::datesToAdd() const
 {
     return m_datesToAdd;
 }
 
 void InfiniteCalendarViewModel::setDatesToAdd(int datesToAdd)
 {
     m_datesToAdd = datesToAdd;
     Q_EMIT datesToAddChanged();
 }
 
 int InfiniteCalendarViewModel::scale()
 {
     return m_scale;
 }
 
 void InfiniteCalendarViewModel::setScale(int scale)
 {
     beginResetModel();
 
     m_startDates.clear();
     m_firstDayOfMonthDates.clear();
     m_scale = scale;
     setup();
     Q_EMIT scaleChanged();
 
     endResetModel();
 }
 
 #include "moc_infinitecalendarviewmodel.cpp"