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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 <QRect>
#include <QStringList>
#include <QWidget>
class TagColors;
class QContextMenuEvent;
/// One row of tag chips under the message pane.
///
/// A single row by design: the message area must not shift as you move between
/// threads with different numbers of tags. Whatever does not fit collapses
/// into a trailing "+N" chip whose tooltip names the hidden tags.
class TagStrip : public QWidget
{
Q_OBJECT
public:
explicit TagStrip(QWidget *parent = nullptr);
/// Not owned; must outlive the strip.
void setTagColors(const TagColors *colours);
/// Account tags are filtered out: they belong to the thread list chip,
/// being a different taxonomy from the functional tags shown here.
void setTags(const QStringList &tags);
QSize sizeHint() const override;
/// The tags actually drawn, in order. Exposed for testing the overflow
/// split without rendering.
QStringList visibleTags() const { return m_visible; }
QStringList hiddenTags() const { return m_hidden; }
/// The rect of the visible chip at `index`, empty when out of range.
///
/// The SAME function paintEvent lays out from, so what is drawn and what
/// is clickable cannot drift. `CardDelegate::expanderRectFor` exists for
/// this reason and this follows it.
QRect chipRectAt(int index) const;
/// The tag under `point`, empty when the point is on no chip.
///
/// The trailing "+N" chip yields an empty string: it stands for a list of
/// tags rather than for one, so there is nothing a search could name.
QString chipAt(const QPoint &point) const;
signals:
/// A visible chip was right-clicked. `globalPos` is where to pop a menu.
///
/// The strip does not build the menu itself: what a tag can do belongs to
/// the window, which owns the query bar and the actions.
void tagContextMenuRequested(const QString &tag, const QPoint &globalPos);
protected:
void paintEvent(QPaintEvent *event) override;
void resizeEvent(QResizeEvent *event) override;
void contextMenuEvent(QContextMenuEvent *event) override;
private:
/// Recomputes the visible/hidden split for the current width.
void relayout();
QStringList m_tags; ///< Functional tags only, account ones removed.
QStringList m_visible;
QStringList m_hidden;
const TagColors *m_tagColors = nullptr;
};
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