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// Copyright (C) 2022 UnionTech Software Technology Co., Ltd.
// SPDX-License-Identifier: LGPL-3.0-or-later
#include "qdciiohandler.h"
#ifndef QT_NO_SVGRENDERER
#include "qimage.h"
#include "qpixmap.h"
#include "qpainter.h"
#include "qvariant.h"
#include "qbuffer.h"
#include "qdebug.h"
#include <DDciIcon>
DGUI_USE_NAMESPACE
QT_BEGIN_NAMESPACE
class QDciIOHandlerPrivate
{
public:
QDciIOHandlerPrivate(QDciIOHandler *qq)
: q(qq)
{}
bool load(QIODevice *device);
QDciIOHandler *q;
DDciIcon icon;
DDciIconMatchResult current = nullptr;
DDciIcon::Theme theme = DDciIcon::Light;
DDciIcon::Mode mode = DDciIcon::Normal;
bool loaded = false;
bool readDone = false;
int defaultSize = 0;
int scaledSize = 0;
QColor backColor;
};
bool QDciIOHandlerPrivate::load(QIODevice *device)
{
if (!device)
return false;
if (loaded)
return current;
if (q->format().isEmpty() && !q->canRead())
return false;
loaded = true;
QBuffer *buf = qobject_cast<QBuffer *>(device);
if (buf) {
const QByteArray &ba = buf->data();
icon = DDciIcon(QByteArray::fromRawData(ba.constData() + buf->pos(), ba.size() - buf->pos()));
buf->seek(ba.size());
} else {
icon = DDciIcon(device->readAll());
}
current = nullptr;
if (icon.isNull())
return false;
if (q->format().startsWith(QByteArrayLiteral("dci-"))) {
const auto sections = q->format().split('-');
if (sections.size() == 3) {
if (sections[1] == QByteArrayLiteral("dark"))
theme = DDciIcon::Dark;
if (sections[2] == QByteArrayLiteral("disabled"))
mode = DDciIcon::Disabled;
else if (sections[2] == QByteArrayLiteral("hover"))
mode = DDciIcon::Hover;
else if (sections[2] == QByteArrayLiteral("pressed"))
mode = DDciIcon::Pressed;
}
}
current = icon.matchIcon(0, theme, mode, DDciIcon::DontFallbackMode);
if (!current)
return false;
defaultSize = icon.actualSize(current);
return true;
}
QDciIOHandler::QDciIOHandler()
: d(new QDciIOHandlerPrivate(this))
{
}
QDciIOHandler::~QDciIOHandler()
{
delete d;
}
bool QDciIOHandler::canRead() const
{
if (!device())
return false;
if (d->loaded && !d->readDone)
return true;
QByteArray buf = device()->peek(4);
if (buf.startsWith(QByteArrayLiteral("DCI"))) {
// Decide format from content..
if (format().isEmpty())
setFormat("dci");
return true;
}
return false;
}
QByteArray QDciIOHandler::name() const
{
return "dci";
}
bool QDciIOHandler::read(QImage *image)
{
if (d->readDone || d->load(device())) {
Q_ASSERT(d->current);
int finalSize = d->scaledSize > 0 ? d->scaledSize : d->defaultSize;
if (finalSize > 0) {
DDciIconPalette palette(QColor::Invalid, d->backColor);
*image = d->icon.pixmap(1.0, finalSize, d->current, palette).toImage();
}
d->readDone = true;
return true;
}
return false;
}
QVariant QDciIOHandler::option(ImageOption option) const
{
switch(option) {
case ImageFormat:
return QImage::Format_ARGB32_Premultiplied;
case Size:
d->load(device());
return QSize(d->defaultSize, d->defaultSize);
case ScaledSize:
return QSize(d->scaledSize, d->scaledSize);
case BackgroundColor:
return d->backColor;
case Animation:
// TODO: Support animation for DDciIcon
return false;
case Endianness:
return QSysInfo::LittleEndian;
case SupportedSubTypes:
if (d->load(device()) && d->icon.isSupportedAttribute(d->current, DDciIcon::HasPalette))
return QVariant::fromValue(QByteArrayList { QByteArrayLiteral("HasPalette") });
return QVariant::fromValue(QByteArrayList());
default:
break;
}
return QVariant();
}
void QDciIOHandler::setOption(ImageOption option, const QVariant &value)
{
switch(option) {
case ScaledSize: {
const QSize &size = value.toSize();
d->scaledSize = qMin(size.width(), size.height());
break;
}
case BackgroundColor:
d->backColor = qvariant_cast<QColor>(value);
default:
break;
}
}
bool QDciIOHandler::supportsOption(ImageOption option) const
{
switch(option)
{
case Size:
case ScaledSize:
case ImageFormat:
case Animation:
case BackgroundColor:
case Endianness:
case SupportedSubTypes:
return true;
default:
break;
}
return false;
}
bool QDciIOHandler::canRead(QIODevice *device)
{
QByteArray buf = device->peek(4);
return buf.startsWith(QByteArrayLiteral("DCI"));
}
QT_END_NAMESPACE
#endif // QT_NO_SVGRENDERER
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