summaryrefslogtreecommitdiff
path: root/vcl/qt5/Qt5Transferable.cxx
blob: 81a47871f4113154e053264842bb84c7aab243b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 */

#include <Qt5Transferable.hxx>

#include <comphelper/sequence.hxx>
#include <sal/log.hxx>

#include <QtWidgets/QApplication>

#include <Qt5Instance.hxx>
#include <Qt5Tools.hxx>

#include <cassert>

static bool lcl_textMimeInfo(const OUString& rMimeString, bool& bHaveNoCharset, bool& bHaveUTF16,
                             bool& bHaveUTF8)
{
    sal_Int32 nIndex = 0;
    if (rMimeString.getToken(0, ';', nIndex) == "text/plain")
    {
        OUString aToken(rMimeString.getToken(0, ';', nIndex));
        if (aToken == "charset=utf-16")
            bHaveUTF16 = true;
        else if (aToken == "charset=utf-8")
            bHaveUTF8 = true;
        else if (aToken.isEmpty())
            bHaveNoCharset = true;
        else // we just handle UTF-16 and UTF-8, everything else is "bytes"
            return false;
        return true;
    }
    return false;
}

Qt5Transferable::Qt5Transferable(const QMimeData* pMimeData)
    : m_pMimeData(pMimeData)
    , m_bConvertFromLocale(false)
{
    assert(pMimeData);
}

css::uno::Sequence<css::datatransfer::DataFlavor> SAL_CALL Qt5Transferable::getTransferDataFlavors()
{
    // it's just filled once, ever, so just try to get it without locking first
    if (m_aMimeTypeSeq.hasElements())
        return m_aMimeTypeSeq;

    // better safe then sorry; preventing broken usage
    // DnD should not be shared and Clipboard access runs in the GUI thread
    osl::MutexGuard aGuard(m_aMutex);
    if (m_aMimeTypeSeq.hasElements())
        return m_aMimeTypeSeq;

    QStringList aFormatList(m_pMimeData->formats());
    // we might add the UTF-16 mime text variant later
    const int nMimeTypeSeqSize = aFormatList.size() + 1;
    bool bHaveNoCharset = false, bHaveUTF16 = false;
    css::uno::Sequence<css::datatransfer::DataFlavor> aMimeTypeSeq(nMimeTypeSeqSize);

    css::datatransfer::DataFlavor aFlavor;
    int nMimeTypeCount = 0;

    for (const QString& rMimeType : aFormatList)
    {
        // filter out non-MIME types such as TARGETS, MULTIPLE, TIMESTAMP
        if (rMimeType.indexOf('/') == -1)
            continue;

        // gtk3 thinks it is not well defined - skip too
        if (rMimeType == QStringLiteral("text/plain;charset=unicode"))
            continue;

        // LO doesn't like 'text/plain', so we have to provide UTF-16
        bool bIsNoCharset = false, bIsUTF16 = false, bIsUTF8 = false;
        if (lcl_textMimeInfo(toOUString(rMimeType), bIsNoCharset, bIsUTF16, bIsUTF8))
        {
            bHaveNoCharset |= bIsNoCharset;
            bHaveUTF16 |= bIsUTF16;
            if (bIsUTF16)
                aFlavor.DataType = cppu::UnoType<OUString>::get();
            else
                aFlavor.DataType = cppu::UnoType<css::uno::Sequence<sal_Int8>>::get();
        }
        else
            aFlavor.DataType = cppu::UnoType<css::uno::Sequence<sal_Int8>>::get();

        aFlavor.MimeType = toOUString(rMimeType);
        assert(nMimeTypeCount < nMimeTypeSeqSize);
        aMimeTypeSeq[nMimeTypeCount] = aFlavor;
        nMimeTypeCount++;
    }

    m_bConvertFromLocale = bHaveNoCharset && !bHaveUTF16;
    if (m_bConvertFromLocale)
    {
        aFlavor.MimeType = "text/plain;charset=utf-16";
        aFlavor.DataType = cppu::UnoType<OUString>::get();
        assert(nMimeTypeCount < nMimeTypeSeqSize);
        aMimeTypeSeq[nMimeTypeCount] = aFlavor;
        nMimeTypeCount++;
    }

    aMimeTypeSeq.realloc(nMimeTypeCount);

    m_aMimeTypeSeq = aMimeTypeSeq;
    return m_aMimeTypeSeq;
}

sal_Bool SAL_CALL
Qt5Transferable::isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor)
{
    const auto aSeq = getTransferDataFlavors();
    return std::any_of(aSeq.begin(), aSeq.end(), [&](const css::datatransfer::DataFlavor& aFlavor) {
        return rFlavor.MimeType == aFlavor.MimeType;
    });
}

css::uno::Any SAL_CALL
Qt5Transferable::getTransferData(const css::datatransfer::DataFlavor& rFlavor)
{
    css::uno::Any aAny;
    if (!isDataFlavorSupported(rFlavor))
        return aAny;

    if (rFlavor.MimeType == "text/plain;charset=utf-16")
    {
        OUString aString;
        if (m_bConvertFromLocale)
        {
            QByteArray aByteData(m_pMimeData->data(QStringLiteral("text/plain")));
            aString = OUString(reinterpret_cast<const sal_Char*>(aByteData.data()),
                               aByteData.size(), osl_getThreadTextEncoding());
        }
        else
        {
            QByteArray aByteData(m_pMimeData->data(toQString(rFlavor.MimeType)));
            aString = OUString(reinterpret_cast<const sal_Unicode*>(aByteData.data()),
                               aByteData.size() / 2);
        }
        aAny <<= aString;
    }
    else
    {
        QByteArray aByteData(m_pMimeData->data(toQString(rFlavor.MimeType)));
        css::uno::Sequence<sal_Int8> aSeq(reinterpret_cast<const sal_Int8*>(aByteData.data()),
                                          aByteData.size());
        aAny <<= aSeq;
    }

    return aAny;
}

Qt5ClipboardTransferable::Qt5ClipboardTransferable(const QClipboard::Mode aMode,
                                                   const QMimeData* pMimeData)
    : Qt5Transferable(pMimeData)
    , m_aMode(aMode)
{
}

bool Qt5ClipboardTransferable::hasInFlightChanged() const
{
    const bool bChanged(mimeData() != QApplication::clipboard()->mimeData(m_aMode));
    SAL_WARN_IF(bChanged, "vcl.qt5",
                "In flight clipboard change detected - broken clipboard read!");
    return bChanged;
}

css::uno::Any SAL_CALL
Qt5ClipboardTransferable::getTransferData(const css::datatransfer::DataFlavor& rFlavor)
{
    css::uno::Any aAny;
    auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
    SolarMutexGuard g;
    pSalInst->RunInMainThread([&, this]() {
        if (!hasInFlightChanged())
            aAny = Qt5Transferable::getTransferData(rFlavor);
    });
    return aAny;
}

css::uno::Sequence<css::datatransfer::DataFlavor>
    SAL_CALL Qt5ClipboardTransferable::getTransferDataFlavors()
{
    css::uno::Sequence<css::datatransfer::DataFlavor> aSeq;
    auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
    SolarMutexGuard g;
    pSalInst->RunInMainThread([&, this]() {
        if (!hasInFlightChanged())
            aSeq = Qt5Transferable::getTransferDataFlavors();
    });
    return aSeq;
}

sal_Bool SAL_CALL
Qt5ClipboardTransferable::isDataFlavorSupported(const css::datatransfer::DataFlavor& rFlavor)
{
    bool bIsSupported = false;
    auto* pSalInst(static_cast<Qt5Instance*>(GetSalData()->m_pInstance));
    SolarMutexGuard g;
    pSalInst->RunInMainThread([&, this]() {
        if (!hasInFlightChanged())
            bIsSupported = Qt5Transferable::isDataFlavorSupported(rFlavor);
    });
    return bIsSupported;
}

Qt5MimeData::Qt5MimeData(const css::uno::Reference<css::datatransfer::XTransferable>& xTrans)
    : m_aContents(xTrans)
    , m_bHaveNoCharset(false)
    , m_bHaveUTF8(false)
{
    assert(xTrans.is());
}

bool Qt5MimeData::deepCopy(QMimeData** const pMimeCopy) const
{
    if (!pMimeCopy)
        return false;

    QMimeData* pMimeData = new QMimeData();
    for (QString& format : formats())
    {
        QByteArray aData = data(format);
        // Checking for custom MIME types
        if (format.startsWith("application/x-qt"))
        {
            // Retrieving true format name
            int indexBegin = format.indexOf('"') + 1;
            int indexEnd = format.indexOf('"', indexBegin);
            format = format.mid(indexBegin, indexEnd - indexBegin);
        }
        pMimeData->setData(format, aData);
    }

    *pMimeCopy = pMimeData;
    return true;
}

QStringList Qt5MimeData::formats() const
{
    if (!m_aMimeTypeList.isEmpty())
        return m_aMimeTypeList;

    const css::uno::Sequence<css::datatransfer::DataFlavor> aFormats
        = m_aContents->getTransferDataFlavors();
    QStringList aList;
    bool bHaveUTF16 = false;

    for (const auto& rFlavor : aFormats)
    {
        aList << toQString(rFlavor.MimeType);
        lcl_textMimeInfo(rFlavor.MimeType, m_bHaveNoCharset, bHaveUTF16, m_bHaveUTF8);
    }

    // we provide a locale encoded and a UTF-8 variant, if missing
    if (m_bHaveNoCharset || bHaveUTF16 || m_bHaveUTF8)
    {
        // if there is a text representation from LO point of view, it'll be UTF-16
        assert(bHaveUTF16);
        if (!m_bHaveUTF8)
            aList << QStringLiteral("text/plain;charset=utf-8");
        if (!m_bHaveNoCharset)
            aList << QStringLiteral("text/plain");
    }

    m_aMimeTypeList = aList;
    return m_aMimeTypeList;
}

QVariant Qt5MimeData::retrieveData(const QString& mimeType, QVariant::Type) const
{
    if (!hasFormat(mimeType))
        return QVariant();

    css::datatransfer::DataFlavor aFlavor;
    aFlavor.MimeType = toOUString(mimeType);
    aFlavor.DataType = cppu::UnoType<css::uno::Sequence<sal_Int8>>::get();

    bool bWantNoCharset = false, bWantUTF16 = false, bWantUTF8 = false;
    if (lcl_textMimeInfo(aFlavor.MimeType, bWantNoCharset, bWantUTF16, bWantUTF8))
    {
        if ((bWantNoCharset && !m_bHaveNoCharset) || (bWantUTF8 && !m_bHaveUTF8))
        {
            aFlavor.MimeType = "text/plain;charset=utf-16";
            aFlavor.DataType = cppu::UnoType<OUString>::get();
        }
        else if (bWantUTF16)
            aFlavor.DataType = cppu::UnoType<OUString>::get();
    }

    css::uno::Any aValue;

    try
    {
        aValue = m_aContents->getTransferData(aFlavor);
    }
    catch (...)
    {
    }

    QByteArray aByteArray;
    if (aValue.getValueTypeClass() == css::uno::TypeClass_STRING)
    {
        OUString aString;
        aValue >>= aString;

        if (bWantUTF8)
        {
            OString aUTF8String(OUStringToOString(aString, RTL_TEXTENCODING_UTF8));
            aByteArray = QByteArray(reinterpret_cast<const char*>(aUTF8String.getStr()),
                                    aUTF8String.getLength());
        }
        else if (bWantNoCharset)
        {
            OString aLocaleString(OUStringToOString(aString, osl_getThreadTextEncoding()));
            aByteArray = QByteArray(reinterpret_cast<const char*>(aLocaleString.getStr()),
                                    aLocaleString.getLength());
        }
        else
            return QVariant(toQString(aString));
    }
    else
    {
        css::uno::Sequence<sal_Int8> aData;
        aValue >>= aData;
        aByteArray
            = QByteArray(reinterpret_cast<const char*>(aData.getConstArray()), aData.getLength());
    }
    return QVariant::fromValue(aByteArray);
}

bool Qt5MimeData::hasFormat(const QString& mimeType) const { return formats().contains(mimeType); }

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */