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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.
*
* ======================================================================== */
#include "VariableSizedImageObject.h"
#include <QAbstractTextDocumentLayout>
#include <QDebug>
#include <QPainter>
#include <QTextObject>
#include <memory>
#include "Application.h"
#include "net/ApiDownload.h"
#include "net/NetJob.h"
enum FormatProperties
{
ImageData = QTextFormat::UserProperty + 1
};
QSizeF VariableSizedImageObject::intrinsicSize(QTextDocument* doc, int posInDocument, const QTextFormat& format)
{
Q_UNUSED(posInDocument);
auto image = qvariant_cast<QImage>(format.property(ImageData));
auto size = image.size();
if (size.isEmpty()) // can't resize an empty image
return { size };
// calculate the new image size based on the properties
int width = 0;
int height = 0;
auto widthVar = format.property(QTextFormat::ImageWidth);
if (widthVar.isValid())
{
width = widthVar.toInt();
}
auto heigthVar = format.property(QTextFormat::ImageHeight);
if (heigthVar.isValid())
{
height = heigthVar.toInt();
}
if (width != 0 && height != 0)
{
size.setWidth(width);
size.setHeight(height);
}
else if (width != 0)
{
size.setHeight((width * size.height()) / size.width());
size.setWidth(width);
}
else if (height != 0)
{
size.setWidth((height * size.width()) / size.height());
size.setHeight(height);
}
// Get the width of the text content to make the image similar sized.
// doc->textWidth() includes the margin, so we need to remove it.
auto doc_width = doc->textWidth() - 2 * doc->documentMargin();
if (size.width() > doc_width)
size *= doc_width / (double)size.width();
return { size };
}
void VariableSizedImageObject::drawObject(QPainter* painter,
const QRectF& rect,
QTextDocument* doc,
int posInDocument,
const QTextFormat& format)
{
if (!format.hasProperty(ImageData))
{
QUrl image_url{ qvariant_cast<QString>(format.property(QTextFormat::ImageName)) };
if (m_fetching_images.contains(image_url) || image_url.isEmpty())
return;
auto meta = std::make_shared<ImageMetadata>();
meta->posInDocument = posInDocument;
meta->url = image_url;
auto widthVar = format.property(QTextFormat::ImageWidth);
if (widthVar.isValid())
{
meta->width = widthVar.toInt();
}
auto heigthVar = format.property(QTextFormat::ImageHeight);
if (heigthVar.isValid())
{
meta->height = heigthVar.toInt();
}
loadImage(doc, meta);
return;
}
auto image = qvariant_cast<QImage>(format.property(ImageData));
painter->setRenderHint(QPainter::RenderHint::SmoothPixmapTransform);
painter->drawImage(rect, image);
}
void VariableSizedImageObject::flush()
{
m_fetching_images.clear();
}
void VariableSizedImageObject::parseImage(QTextDocument* doc, std::shared_ptr<ImageMetadata> meta)
{
QTextCursor cursor(doc);
cursor.setPosition(meta->posInDocument);
cursor.setKeepPositionOnInsert(true);
auto image_char_format = cursor.charFormat();
image_char_format.setObjectType(QTextFormat::ImageObject);
image_char_format.setProperty(ImageData, meta->image);
image_char_format.setProperty(QTextFormat::ImageName, meta->url.toDisplayString());
image_char_format.setProperty(QTextFormat::ImageWidth, meta->width);
image_char_format.setProperty(QTextFormat::ImageHeight, meta->height);
// Qt doesn't allow us to modify the properties of an existing object in the document.
// So we remove the old one and add the new one with the ImageData property set.
cursor.deleteChar();
cursor.insertText(QString(QChar::ObjectReplacementCharacter), image_char_format);
}
void VariableSizedImageObject::loadImage(QTextDocument* doc, std::shared_ptr<ImageMetadata> meta)
{
m_fetching_images.insert(meta->url);
MetaEntryPtr entry = APPLICATION->metacache()->resolveEntry(
m_meta_entry,
QString("images/%1")
.arg(
QString(QCryptographicHash::hash(meta->url.toEncoded(), QCryptographicHash::Algorithm::Sha1).toHex())));
auto job = new NetJob(QString("Load Image: %1").arg(meta->url.fileName()), APPLICATION->network());
job->setAskRetry(false);
job->addNetAction(Net::ApiDownload::makeCached(meta->url, entry));
auto full_entry_path = entry->getFullPath();
auto source_url = meta->url;
auto loadImage = [this, doc, full_entry_path, source_url, meta](const QImage& image)
{
doc->addResource(QTextDocument::ImageResource, source_url, image);
meta->image = image;
parseImage(doc, meta);
// This size hack is needed to prevent the content from being laid out in an area smaller
// than the total width available (weird).
auto size = doc->pageSize();
doc->adjustSize();
doc->setPageSize(size);
m_fetching_images.remove(source_url);
};
connect(job,
&NetJob::succeeded,
this,
[this, full_entry_path, source_url, loadImage]
{
qDebug() << "Loaded resource at:" << full_entry_path;
// If we flushed, don't proceed.
if (!m_fetching_images.contains(source_url))
return;
QImage image(full_entry_path);
loadImage(image);
});
connect(job,
&NetJob::failed,
this,
[this, full_entry_path, source_url, loadImage](QString reason)
{
qWarning() << "Failed resource at:" << full_entry_path << " because:" << reason;
// If we flushed, don't proceed.
if (!m_fetching_images.contains(source_url))
return;
loadImage(QImage());
});
connect(job, &NetJob::finished, job, &NetJob::deleteLater);
job->start();
}
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