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/*
* qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
* Copyright (C) 2026 Danilo M. <danix@danix.xyz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <QDate>
#include <QPoint>
#include <QRect>
/// Where everything in the month grid goes, with no painter and no widget.
///
/// The CardLayout precedent: a geometric claim is tested as a function call,
/// because AGENTS.md records how rendering probes lie. Six rows of seven
/// always, so the grid does not jump in height between months.
class MonthLayout
{
public:
static constexpr int kCells = 42;
MonthLayout(const QRect &area, int year, int month, Qt::DayOfWeek firstDay,
int dayNumberHeight, int chipHeight);
static QDate gridStart(int year, int month, Qt::DayOfWeek firstDay);
QDate dateAt(int cell) const;
int cellOf(const QDate &date) const; ///< -1 when not on the grid.
QRect cellRect(int cell) const;
int cellAt(const QPoint &point) const; ///< -1 outside the grid.
/// How many chip slots fit under a cell's day number.
int capacity() const;
/// How many of `total` chips are drawn; when fewer than `total`, the
/// next slot holds "+N more".
int visibleChips(int total) const;
QRect chipRect(int cell, int slot) const;
private:
QRect m_area;
QDate m_start;
int m_dayNumberHeight;
int m_chipHeight;
};
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