236 lines
8.9 KiB
C++
236 lines
8.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qinternalmimedata_p.h"
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#include <QtCore/qbuffer.h>
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#include <QtGui/qimage.h>
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#include <QtGui/qimagereader.h>
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#include <QtGui/qimagewriter.h>
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QT_BEGIN_NAMESPACE
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static QStringList imageMimeFormats(const QList<QByteArray> &imageFormats)
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{
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QStringList formats;
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formats.reserve(imageFormats.size());
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for (const auto &format : imageFormats)
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formats.append(QLatin1String("image/") + QLatin1String(format.toLower()));
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//put png at the front because it is best
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int pngIndex = formats.indexOf(QLatin1String("image/png"));
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if (pngIndex != -1 && pngIndex != 0)
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formats.move(pngIndex, 0);
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return formats;
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}
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static inline QStringList imageReadMimeFormats()
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{
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return imageMimeFormats(QImageReader::supportedImageFormats());
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}
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static inline QStringList imageWriteMimeFormats()
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{
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return imageMimeFormats(QImageWriter::supportedImageFormats());
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}
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QInternalMimeData::QInternalMimeData()
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: QMimeData()
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{
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}
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QInternalMimeData::~QInternalMimeData()
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{
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}
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bool QInternalMimeData::hasFormat(const QString &mimeType) const
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{
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bool foundFormat = hasFormat_sys(mimeType);
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if (!foundFormat && mimeType == QLatin1String("application/x-qt-image")) {
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QStringList imageFormats = imageReadMimeFormats();
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for (int i = 0; i < imageFormats.size(); ++i) {
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if ((foundFormat = hasFormat_sys(imageFormats.at(i))))
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break;
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}
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}
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return foundFormat;
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}
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QStringList QInternalMimeData::formats() const
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{
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QStringList realFormats = formats_sys();
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if (!realFormats.contains(QLatin1String("application/x-qt-image"))) {
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QStringList imageFormats = imageReadMimeFormats();
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for (int i = 0; i < imageFormats.size(); ++i) {
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if (realFormats.contains(imageFormats.at(i))) {
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realFormats += QLatin1String("application/x-qt-image");
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break;
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}
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}
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}
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return realFormats;
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}
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QVariant QInternalMimeData::retrieveData(const QString &mimeType, QMetaType type) const
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{
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QVariant data = retrieveData_sys(mimeType, type);
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if (mimeType == QLatin1String("application/x-qt-image")) {
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if (data.isNull() || (data.metaType().id() == QMetaType::QByteArray && data.toByteArray().isEmpty())) {
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// try to find an image
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QStringList imageFormats = imageReadMimeFormats();
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for (int i = 0; i < imageFormats.size(); ++i) {
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data = retrieveData_sys(imageFormats.at(i), type);
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if (data.isNull() || (data.metaType().id() == QMetaType::QByteArray && data.toByteArray().isEmpty()))
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continue;
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break;
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}
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}
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int typeId = type.id();
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// we wanted some image type, but all we got was a byte array. Convert it to an image.
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if (data.metaType().id() == QMetaType::QByteArray
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&& (typeId == QMetaType::QImage || typeId == QMetaType::QPixmap || typeId == QMetaType::QBitmap))
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data = QImage::fromData(data.toByteArray());
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} else if (mimeType == QLatin1String("application/x-color") && data.metaType().id() == QMetaType::QByteArray) {
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QColor c;
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QByteArray ba = data.toByteArray();
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if (ba.size() == 8) {
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ushort * colBuf = (ushort *)ba.data();
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c.setRgbF(qreal(colBuf[0]) / qreal(0xFFFF),
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qreal(colBuf[1]) / qreal(0xFFFF),
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qreal(colBuf[2]) / qreal(0xFFFF),
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qreal(colBuf[3]) / qreal(0xFFFF));
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data = c;
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} else {
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qWarning("Qt: Invalid color format");
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}
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} else if (data.metaType() != type && data.metaType().id() == QMetaType::QByteArray) {
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// try to use mime data's internal conversion stuf.
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QInternalMimeData *that = const_cast<QInternalMimeData *>(this);
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that->setData(mimeType, data.toByteArray());
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data = QMimeData::retrieveData(mimeType, type);
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that->clear();
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}
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return data;
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}
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bool QInternalMimeData::canReadData(const QString &mimeType)
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{
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return imageReadMimeFormats().contains(mimeType);
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}
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// helper functions for rendering mimedata to the system, this is needed because QMimeData is in core.
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QStringList QInternalMimeData::formatsHelper(const QMimeData *data)
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{
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QStringList realFormats = data->formats();
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if (realFormats.contains(QLatin1String("application/x-qt-image"))) {
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// add all supported image formats
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QStringList imageFormats = imageWriteMimeFormats();
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for (int i = 0; i < imageFormats.size(); ++i) {
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if (!realFormats.contains(imageFormats.at(i)))
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realFormats.append(imageFormats.at(i));
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}
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}
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return realFormats;
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}
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bool QInternalMimeData::hasFormatHelper(const QString &mimeType, const QMimeData *data)
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{
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bool foundFormat = data->hasFormat(mimeType);
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if (!foundFormat) {
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if (mimeType == QLatin1String("application/x-qt-image")) {
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// check all supported image formats
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QStringList imageFormats = imageWriteMimeFormats();
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for (int i = 0; i < imageFormats.size(); ++i) {
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if ((foundFormat = data->hasFormat(imageFormats.at(i))))
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break;
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}
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} else if (mimeType.startsWith(QLatin1String("image/"))) {
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return data->hasImage() && imageWriteMimeFormats().contains(mimeType);
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}
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}
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return foundFormat;
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}
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QByteArray QInternalMimeData::renderDataHelper(const QString &mimeType, const QMimeData *data)
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{
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QByteArray ba;
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if (mimeType == QLatin1String("application/x-color")) {
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/* QMimeData can only provide colors as QColor or the name
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of a color as a QByteArray or a QString. So we need to do
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the conversion to application/x-color here.
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The application/x-color format is :
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type: application/x-color
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format: 16
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data[0]: red
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data[1]: green
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data[2]: blue
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data[3]: opacity
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*/
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ba.resize(8);
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ushort * colBuf = (ushort *)ba.data();
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QColor c = qvariant_cast<QColor>(data->colorData());
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colBuf[0] = ushort(c.redF() * 0xFFFF);
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colBuf[1] = ushort(c.greenF() * 0xFFFF);
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colBuf[2] = ushort(c.blueF() * 0xFFFF);
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colBuf[3] = ushort(c.alphaF() * 0xFFFF);
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} else {
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ba = data->data(mimeType);
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if (ba.isEmpty()) {
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if (mimeType == QLatin1String("application/x-qt-image") && data->hasImage()) {
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QImage image = qvariant_cast<QImage>(data->imageData());
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QBuffer buf(&ba);
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buf.open(QBuffer::WriteOnly);
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// would there not be PNG ??
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image.save(&buf, "PNG");
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} else if (mimeType.startsWith(QLatin1String("image/")) && data->hasImage()) {
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QImage image = qvariant_cast<QImage>(data->imageData());
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QBuffer buf(&ba);
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buf.open(QBuffer::WriteOnly);
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image.save(&buf, mimeType.mid(mimeType.indexOf(QLatin1Char('/')) + 1).toLatin1().toUpper());
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}
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}
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}
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return ba;
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}
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QT_END_NAMESPACE
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