path: root/src/gui/kernel/qinternalmimedata.cpp

// 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 namespaceQt::StringLiterals;static QStringList imageMimeFormats(const QList<QByteArray> &imageFormats){ QStringList formats; formats.reserve(imageFormats.size());for(constauto&format : imageFormats) formats.append("image/"_L1 +QLatin1StringView(format.toLower()));//put png at the front because it is bestconst qsizetype pngIndex = formats.indexOf("image/png"_L1);if(pngIndex != -1&& pngIndex !=0) formats.move(pngIndex,0);return formats;}staticinline QStringList imageReadMimeFormats(){returnimageMimeFormats(QImageReader::supportedImageFormats());}staticinline QStringList imageWriteMimeFormats(){returnimageMimeFormats(QImageWriter::supportedImageFormats());}QInternalMimeData::QInternalMimeData():QMimeData(){}QInternalMimeData::~QInternalMimeData(){}boolQInternalMimeData::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;}boolQInternalMimeData::canReadData(const QString &mimeType){returnimageReadMimeFormats().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;}boolQInternalMimeData::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(auto prefix ="image/"_L1; mimeType.startsWith(prefix) && data->hasImage()) { QImage image = qvariant_cast<QImage>(data->imageData()); QBuffer buf(&ba); buf.open(QBuffer::WriteOnly);auto type = QStringView{mimeType}.sliced(prefix.size()); image.save(&buf, type.toLatin1().toUpper().constData());}}}return ba;} QT_END_NAMESPACE #include"moc_qinternalmimedata_p.cpp"