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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qinternalmimedata_p.h"
#include <QtCore/qbuffer.h>
#include <QtGui/qimage.h>
#include <QtGui/qimagereader.h>
#include <QtGui/qimagewriter.h>
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
static QStringList imageMimeFormats(const QList<QByteArray> &imageFormats)
{
QStringList formats;
formats.reserve(imageFormats.size());
for (const auto &format : imageFormats)
formats.append("image/"_L1 + QLatin1StringView(format.toLower()));
//put png at the front because it is best
const qsizetype pngIndex = formats.indexOf("image/png"_L1);
if (pngIndex != -1 && pngIndex != 0)
formats.move(pngIndex, 0);
return formats;
}
static inline QStringList imageReadMimeFormats()
{
return imageMimeFormats(QImageReader::supportedImageFormats());
}
static inline QStringList imageWriteMimeFormats()
{
return imageMimeFormats(QImageWriter::supportedImageFormats());
}
QInternalMimeData::QInternalMimeData()
: QMimeData()
{
}
QInternalMimeData::~QInternalMimeData()
{
}
bool QInternalMimeData::hasFormat(const QString &mimeType) const
{
bool foundFormat = hasFormat_sys(mimeType);
if (!foundFormat && mimeType == "application/x-qt-image"_L1) {
QStringList imageFormats = imageReadMimeFormats();
for (int i = 0; i < imageFormats.size(); ++i) {
if ((foundFormat = hasFormat_sys(imageFormats.at(i))))
break;
}
}
return foundFormat;
}
QStringList QInternalMimeData::formats() const
{
QStringList realFormats = formats_sys();
if (!realFormats.contains("application/x-qt-image"_L1)) {
QStringList imageFormats = imageReadMimeFormats();
for (int i = 0; i < imageFormats.size(); ++i) {
if (realFormats.contains(imageFormats.at(i))) {
realFormats += "application/x-qt-image"_L1;
break;
}
}
}
return realFormats;
}
QVariant QInternalMimeData::retrieveData(const QString &mimeType, QMetaType type) const
{
QVariant data = retrieveData_sys(mimeType, type);
if (mimeType == "application/x-qt-image"_L1) {
if (data.isNull() || (data.metaType().id() == QMetaType::QByteArray && data.toByteArray().isEmpty())) {
// try to find an image
QStringList imageFormats = imageReadMimeFormats();
for (int i = 0; i < imageFormats.size(); ++i) {
data = retrieveData_sys(imageFormats.at(i), type);
if (data.isNull() || (data.metaType().id() == QMetaType::QByteArray && data.toByteArray().isEmpty()))
continue;
break;
}
}
int typeId = type.id();
// we wanted some image type, but all we got was a byte array. Convert it to an image.
if (data.metaType().id() == QMetaType::QByteArray
&& (typeId == QMetaType::QImage || typeId == QMetaType::QPixmap || typeId == QMetaType::QBitmap))
data = QImage::fromData(data.toByteArray());
} else if (mimeType == "application/x-color"_L1 && data.metaType().id() == QMetaType::QByteArray) {
QColor c;
QByteArray ba = data.toByteArray();
if (ba.size() == 8) {
ushort * colBuf = (ushort *)ba.data();
c.setRgbF(qreal(colBuf[0]) / qreal(0xFFFF),
qreal(colBuf[1]) / qreal(0xFFFF),
qreal(colBuf[2]) / qreal(0xFFFF),
qreal(colBuf[3]) / qreal(0xFFFF));
data = c;
} else {
qWarning("Qt: Invalid color format");
}
} else if (data.metaType() != type && data.metaType().id() == QMetaType::QByteArray) {
// try to use mime data's internal conversion stuf.
QInternalMimeData *that = const_cast<QInternalMimeData *>(this);
that->setData(mimeType, data.toByteArray());
data = QMimeData::retrieveData(mimeType, type);
that->clear();
}
return data;
}
bool QInternalMimeData::canReadData(const QString &mimeType)
{
return imageReadMimeFormats().contains(mimeType);
}
// helper functions for rendering mimedata to the system, this is needed because QMimeData is in core.
QStringList QInternalMimeData::formatsHelper(const QMimeData *data)
{
QStringList realFormats = data->formats();
if (realFormats.contains("application/x-qt-image"_L1)) {
// add all supported image formats
QStringList imageFormats = imageWriteMimeFormats();
for (int i = 0; i < imageFormats.size(); ++i) {
if (!realFormats.contains(imageFormats.at(i)))
realFormats.append(imageFormats.at(i));
}
}
return realFormats;
}
bool QInternalMimeData::hasFormatHelper(const QString &mimeType, const QMimeData *data)
{
bool foundFormat = data->hasFormat(mimeType);
if (!foundFormat) {
if (mimeType == "application/x-qt-image"_L1) {
// check all supported image formats
QStringList imageFormats = imageWriteMimeFormats();
for (int i = 0; i < imageFormats.size(); ++i) {
if ((foundFormat = data->hasFormat(imageFormats.at(i))))
break;
}
} else if (mimeType.startsWith("image/"_L1)) {
return data->hasImage() && imageWriteMimeFormats().contains(mimeType);
}
}
return foundFormat;
}
QByteArray QInternalMimeData::renderDataHelper(const QString &mimeType, const QMimeData *data)
{
QByteArray ba;
if (mimeType == "application/x-color"_L1) {
/* QMimeData can only provide colors as QColor or the name
of a color as a QByteArray or a QString. So we need to do
the conversion to application/x-color here.
The application/x-color format is :
type: application/x-color
format: 16
data[0]: red
data[1]: green
data[2]: blue
data[3]: opacity
*/
ba.resize(8);
ushort * colBuf = (ushort *)ba.data();
QColor c = qvariant_cast<QColor>(data->colorData());
colBuf[0] = ushort(c.redF() * 0xFFFF);
colBuf[1] = ushort(c.greenF() * 0xFFFF);
colBuf[2] = ushort(c.blueF() * 0xFFFF);
colBuf[3] = ushort(c.alphaF() * 0xFFFF);
} else {
ba = data->data(mimeType);
if (ba.isEmpty()) {
if (mimeType == "application/x-qt-image"_L1 && data->hasImage()) {
QImage image = qvariant_cast<QImage>(data->imageData());
QBuffer buf(&ba);
buf.open(QBuffer::WriteOnly);
// would there not be PNG ??
image.save(&buf, "PNG");
} else if (mimeType.startsWith("image/"_L1) && data->hasImage()) {
QImage image = qvariant_cast<QImage>(data->imageData());
QBuffer buf(&ba);
buf.open(QBuffer::WriteOnly);
image.save(&buf, mimeType.mid(mimeType.indexOf(u'/') + 1).toLatin1().toUpper());
}
}
}
return ba;
}
QT_END_NAMESPACE
#include "moc_qinternalmimedata_p.cpp"
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