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// SPDX-License-Identifier: GPL-3.0-only
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
 *  ProjT Launcher - Minecraft Launcher
 *  Copyright (C) 2026 Project Tick
 *
 *  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, version 3.
 *
 *  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.
 *
 * === Upstream License Block (Do Not Modify) ==============================
 *
 *
 *
 *  Prism Launcher - Minecraft Launcher
 *  Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
 *
 *  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, version 3.
 *
 *  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 <QObject>
#include <QString>
#include <QTextObjectInterface>
#include <QAbstractTextDocumentLayout>
#include <QUrl>
#include <memory>

/** Custom image text object to be used instead of the normal one in ProjectDescriptionPage.
 *
 *  Why? Because we want to re-scale images dynamically based on the document's size, in order to
 *  not have images being weirdly cropped out in different resolutions.
 */
class VariableSizedImageObject final : public QObject, public QTextObjectInterface
{
	Q_OBJECT
	Q_INTERFACES(QTextObjectInterface)

	struct ImageMetadata
	{
		int posInDocument;
		QUrl url;
		QImage image;
		int width;
		int height;
	};

  public:
	QSizeF intrinsicSize(QTextDocument* doc, int posInDocument, const QTextFormat& format) override;
	void drawObject(QPainter* painter,
					const QRectF& rect,
					QTextDocument* doc,
					int posInDocument,
					const QTextFormat& format) override;

	void setMetaEntry(QString meta_entry)
	{
		m_meta_entry = meta_entry;
	}

  public slots:
	/** Stops all currently loading images from modifying the document.
	 *
	 *  This does not stop the ongoing network tasks, it only prevents their result
	 *  from impacting the document any further.
	 */
	void flush();

  private:
	/** Adds the image to the document, in the given position.
	 */
	void parseImage(QTextDocument* doc, std::shared_ptr<ImageMetadata> meta);

	/** Loads an image from an external source, and adds it to the document.
	 *
	 *  This uses m_meta_entry to cache the image.
	 */
	void loadImage(QTextDocument* doc, std::shared_ptr<ImageMetadata> meta);

  private:
	QString m_meta_entry;

	QSet<QUrl> m_fetching_images;
};