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39
40 #include "qwindowsdropdataobject.h"
41
42 #include <QtCore/qurl.h>
43 #include <QtCore/qmimedata.h>
44 #include "qwindowsmime.h"
45
46 QT_BEGIN_NAMESPACE
47
48 /*!
49 \class QWindowsDropDataObject
50 \brief QWindowsOleDataObject subclass specialized for handling Drag&Drop.
51
52 Prevents "text/uri-list" data for local files from being exported as text
53 or URLs, to allow dropped files to be attached to Office applications
54 (instead of creating local hyperlinks).
55
56 \internal
57 */
58
QWindowsDropDataObject(QMimeData * mimeData)59 QWindowsDropDataObject::QWindowsDropDataObject(QMimeData *mimeData) :
60 QWindowsOleDataObject(mimeData)
61 {
62 }
63
64 QWindowsDropDataObject::~QWindowsDropDataObject() = default;
65
66 STDMETHODIMP
GetData(LPFORMATETC pformatetc,LPSTGMEDIUM pmedium)67 QWindowsDropDataObject::GetData(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium)
68 {
69 if (shouldIgnore(pformatetc))
70 return ResultFromScode(DATA_E_FORMATETC);
71
72 return QWindowsOleDataObject::GetData(pformatetc, pmedium);
73 }
74
75 STDMETHODIMP
QueryGetData(LPFORMATETC pformatetc)76 QWindowsDropDataObject::QueryGetData(LPFORMATETC pformatetc)
77 {
78 if (shouldIgnore(pformatetc))
79 return ResultFromScode(DATA_E_FORMATETC);
80
81 return QWindowsOleDataObject::QueryGetData(pformatetc);
82 }
83
84 // If the data is "text/uri-list" only, and all URIs are for local files,
85 // we prevent it from being exported as text or URLs, to make target applications
86 // like MS Office attach or open the files instead of creating local hyperlinks.
shouldIgnore(LPFORMATETC pformatetc) const87 bool QWindowsDropDataObject::shouldIgnore(LPFORMATETC pformatetc) const
88 {
89 QMimeData *dropData = mimeData();
90
91 if (dropData && dropData->formats().size() == 1 && dropData->hasUrls()) {
92 QString formatName = QWindowsMimeConverter::clipboardFormatName(pformatetc->cfFormat);
93 if (pformatetc->cfFormat == CF_UNICODETEXT
94 || pformatetc->cfFormat == CF_TEXT
95 || formatName == QStringLiteral("UniformResourceLocator")
96 || formatName == QStringLiteral("UniformResourceLocatorW")) {
97 const auto urls = dropData->urls();
98 return std::all_of(urls.cbegin(), urls.cend(), [] (const QUrl &u) { return u.isLocalFile(); });
99 }
100 }
101
102 return false;
103 }
104
105 QT_END_NAMESPACE
106