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39
40#include "qinternalmimedata_p.h"
41
42#include <QtCore/qbuffer.h>
43#include <QtGui/qimage.h>
44#include <QtGui/qimagereader.h>
45#include <QtGui/qimagewriter.h>
46
47QT_BEGIN_NAMESPACE
48
49static QStringList imageMimeFormats(const QList<QByteArray> &imageFormats)
50{
51 QStringList formats;
52 formats.reserve(alloc: imageFormats.size());
53 for (const auto &format : imageFormats)
54 formats.append(t: QLatin1String("image/") + QLatin1String(format.toLower()));
55
56 //put png at the front because it is best
57 int pngIndex = formats.indexOf(string: QLatin1String("image/png"));
58 if (pngIndex != -1 && pngIndex != 0)
59 formats.move(from: pngIndex, to: 0);
60
61 return formats;
62}
63
64static inline QStringList imageReadMimeFormats()
65{
66 return imageMimeFormats(imageFormats: QImageReader::supportedImageFormats());
67}
68
69static inline QStringList imageWriteMimeFormats()
70{
71 return imageMimeFormats(imageFormats: QImageWriter::supportedImageFormats());
72}
73
74QInternalMimeData::QInternalMimeData()
75 : QMimeData()
76{
77}
78
79QInternalMimeData::~QInternalMimeData()
80{
81}
82
83bool QInternalMimeData::hasFormat(const QString &mimeType) const
84{
85 bool foundFormat = hasFormat_sys(mimeType);
86 if (!foundFormat && mimeType == QLatin1String("application/x-qt-image")) {
87 QStringList imageFormats = imageReadMimeFormats();
88 for (int i = 0; i < imageFormats.size(); ++i) {
89 if ((foundFormat = hasFormat_sys(mimeType: imageFormats.at(i))))
90 break;
91 }
92 }
93 return foundFormat;
94}
95
96QStringList QInternalMimeData::formats() const
97{
98 QStringList realFormats = formats_sys();
99 if (!realFormats.contains(str: QLatin1String("application/x-qt-image"))) {
100 QStringList imageFormats = imageReadMimeFormats();
101 for (int i = 0; i < imageFormats.size(); ++i) {
102 if (realFormats.contains(str: imageFormats.at(i))) {
103 realFormats += QLatin1String("application/x-qt-image");
104 break;
105 }
106 }
107 }
108 return realFormats;
109}
110
111QVariant QInternalMimeData::retrieveData(const QString &mimeType, QVariant::Type type) const
112{
113 QVariant data = retrieveData_sys(mimeType, type);
114 if (mimeType == QLatin1String("application/x-qt-image")) {
115 if (data.isNull() || (data.userType() == QMetaType::QByteArray && data.toByteArray().isEmpty())) {
116 // try to find an image
117 QStringList imageFormats = imageReadMimeFormats();
118 for (int i = 0; i < imageFormats.size(); ++i) {
119 data = retrieveData_sys(mimeType: imageFormats.at(i), type);
120 if (data.isNull() || (data.userType() == QMetaType::QByteArray && data.toByteArray().isEmpty()))
121 continue;
122 break;
123 }
124 }
125 int typeId = type;
126 // we wanted some image type, but all we got was a byte array. Convert it to an image.
127 if (data.userType() == QMetaType::QByteArray
128 && (typeId == QMetaType::QImage || typeId == QMetaType::QPixmap || typeId == QMetaType::QBitmap))
129 data = QImage::fromData(data: data.toByteArray());
130
131 } else if (mimeType == QLatin1String("application/x-color") && data.userType() == QMetaType::QByteArray) {
132 QColor c;
133 QByteArray ba = data.toByteArray();
134 if (ba.size() == 8) {
135 ushort * colBuf = (ushort *)ba.data();
136 c.setRgbF(r: qreal(colBuf[0]) / qreal(0xFFFF),
137 g: qreal(colBuf[1]) / qreal(0xFFFF),
138 b: qreal(colBuf[2]) / qreal(0xFFFF),
139 a: qreal(colBuf[3]) / qreal(0xFFFF));
140 data = c;
141 } else {
142 qWarning(msg: "Qt: Invalid color format");
143 }
144 } else if (data.userType() != int(type) && data.userType() == QMetaType::QByteArray) {
145 // try to use mime data's internal conversion stuf.
146 QInternalMimeData *that = const_cast<QInternalMimeData *>(this);
147 that->setData(mimetype: mimeType, data: data.toByteArray());
148 data = QMimeData::retrieveData(mimetype: mimeType, preferredType: type);
149 that->clear();
150 }
151 return data;
152}
153
154bool QInternalMimeData::canReadData(const QString &mimeType)
155{
156 return imageReadMimeFormats().contains(str: mimeType);
157}
158
159// helper functions for rendering mimedata to the system, this is needed because QMimeData is in core.
160QStringList QInternalMimeData::formatsHelper(const QMimeData *data)
161{
162 QStringList realFormats = data->formats();
163 if (realFormats.contains(str: QLatin1String("application/x-qt-image"))) {
164 // add all supported image formats
165 QStringList imageFormats = imageWriteMimeFormats();
166 for (int i = 0; i < imageFormats.size(); ++i) {
167 if (!realFormats.contains(str: imageFormats.at(i)))
168 realFormats.append(t: imageFormats.at(i));
169 }
170 }
171 return realFormats;
172}
173
174bool QInternalMimeData::hasFormatHelper(const QString &mimeType, const QMimeData *data)
175{
176
177 bool foundFormat = data->hasFormat(mimetype: mimeType);
178 if (!foundFormat) {
179 if (mimeType == QLatin1String("application/x-qt-image")) {
180 // check all supported image formats
181 QStringList imageFormats = imageWriteMimeFormats();
182 for (int i = 0; i < imageFormats.size(); ++i) {
183 if ((foundFormat = data->hasFormat(mimetype: imageFormats.at(i))))
184 break;
185 }
186 } else if (mimeType.startsWith(s: QLatin1String("image/"))) {
187 return data->hasImage() && imageWriteMimeFormats().contains(str: mimeType);
188 }
189 }
190 return foundFormat;
191}
192
193QByteArray QInternalMimeData::renderDataHelper(const QString &mimeType, const QMimeData *data)
194{
195 QByteArray ba;
196 if (mimeType == QLatin1String("application/x-color")) {
197 /* QMimeData can only provide colors as QColor or the name
198 of a color as a QByteArray or a QString. So we need to do
199 the conversion to application/x-color here.
200 The application/x-color format is :
201 type: application/x-color
202 format: 16
203 data[0]: red
204 data[1]: green
205 data[2]: blue
206 data[3]: opacity
207 */
208 ba.resize(size: 8);
209 ushort * colBuf = (ushort *)ba.data();
210 QColor c = qvariant_cast<QColor>(v: data->colorData());
211 colBuf[0] = ushort(c.redF() * 0xFFFF);
212 colBuf[1] = ushort(c.greenF() * 0xFFFF);
213 colBuf[2] = ushort(c.blueF() * 0xFFFF);
214 colBuf[3] = ushort(c.alphaF() * 0xFFFF);
215 } else {
216 ba = data->data(mimetype: mimeType);
217 if (ba.isEmpty()) {
218 if (mimeType == QLatin1String("application/x-qt-image") && data->hasImage()) {
219 QImage image = qvariant_cast<QImage>(v: data->imageData());
220 QBuffer buf(&ba);
221 buf.open(openMode: QBuffer::WriteOnly);
222 // would there not be PNG ??
223 image.save(device: &buf, format: "PNG");
224 } else if (mimeType.startsWith(s: QLatin1String("image/")) && data->hasImage()) {
225 QImage image = qvariant_cast<QImage>(v: data->imageData());
226 QBuffer buf(&ba);
227 buf.open(openMode: QBuffer::WriteOnly);
228 image.save(device: &buf, format: mimeType.mid(position: mimeType.indexOf(c: QLatin1Char('/')) + 1).toLatin1().toUpper());
229 }
230 }
231 }
232 return ba;
233}
234
235QT_END_NAMESPACE
236

source code of qtbase/src/gui/kernel/qinternalmimedata.cpp