/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team
  Modifications Copyright (C) 2025 mikesolar

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  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, see <http://www.gnu.org/licenses/>.

***/

#include "projectexplorerlistviewitemdelegate.h"

#include <QPainter>

namespace olive
{

ProjectExplorerListViewItemDelegate::ProjectExplorerListViewItemDelegate(
	QObject *parent)
	: QStyledItemDelegate(parent)
{
}

QSize ProjectExplorerListViewItemDelegate::sizeHint(
	const QStyleOptionViewItem &option, const QModelIndex &) const
{
	return QSize(option.decorationSize.height(),
				 option.decorationSize.height());
}

void ProjectExplorerListViewItemDelegate::paint(
	QPainter *painter, const QStyleOptionViewItem &option,
	const QModelIndex &index) const
{
	QFontMetrics fm = painter->fontMetrics();
	QRect img_rect = option.rect;

	if (option.state & QStyle::State_Selected) {
		painter->fillRect(option.rect, option.palette.highlight());
	}

	img_rect.setWidth(qMin(img_rect.width(), img_rect.height()));

	QIcon ico = index.data(Qt::DecorationRole).value<QIcon>();
	QSize icon_size = ico.actualSize(img_rect.size());
	img_rect =
		QRect(img_rect.x() + (img_rect.width() / 2 - icon_size.width() / 2),
			  img_rect.y() + (img_rect.height() / 2 - icon_size.height() / 2),
			  icon_size.width(), icon_size.height());
	painter->drawPixmap(img_rect, ico.pixmap(icon_size));

	QRect text_rect = option.rect;
	text_rect.setLeft(text_rect.left() + option.rect.height());

	int maximum_line_count = qMax(1, option.rect.height() / fm.height() - 1);
	QString text;
	if (maximum_line_count == 1) {
		text = index.data(Qt::DisplayRole).toString();
	} else {
		text = index.data(Qt::ToolTipRole).toString();
		if (text.isEmpty()) {
			text = index.data(Qt::DisplayRole).toString();
		} else {
			QStringList strings = text.split("\n");
			while (strings.size() > maximum_line_count) {
				strings.removeLast();
			}
			text = strings.join("\n");
		}
	}

	painter->setPen(option.state & QStyle::State_Selected ?
						option.palette.highlightedText().color() :
						option.palette.text().color());

	painter->drawText(text_rect,
					  static_cast<int>(Qt::AlignLeft | Qt::AlignVCenter), text);
}

}