summaryrefslogtreecommitdiffstats
path: root/widget/windows/nsDataObj.cpp
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /widget/windows/nsDataObj.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'widget/windows/nsDataObj.cpp')
-rw-r--r--widget/windows/nsDataObj.cpp2276
1 files changed, 2276 insertions, 0 deletions
diff --git a/widget/windows/nsDataObj.cpp b/widget/windows/nsDataObj.cpp
new file mode 100644
index 0000000000..88a2a2ad09
--- /dev/null
+++ b/widget/windows/nsDataObj.cpp
@@ -0,0 +1,2276 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "mozilla/ArrayUtils.h"
+#include "mozilla/TextUtils.h"
+
+#include <ole2.h>
+#include <shlobj.h>
+
+#include "nsComponentManagerUtils.h"
+#include "nsDataObj.h"
+#include "nsArrayUtils.h"
+#include "nsClipboard.h"
+#include "nsReadableUtils.h"
+#include "nsICookieJarSettings.h"
+#include "nsIHttpChannel.h"
+#include "nsISupportsPrimitives.h"
+#include "nsITransferable.h"
+#include "IEnumFE.h"
+#include "nsPrimitiveHelpers.h"
+#include "nsString.h"
+#include "nsCRT.h"
+#include "nsPrintfCString.h"
+#include "nsIStringBundle.h"
+#include "nsEscape.h"
+#include "nsIURL.h"
+#include "nsNetUtil.h"
+#include "mozilla/Components.h"
+#include "mozilla/SpinEventLoopUntil.h"
+#include "mozilla/Unused.h"
+#include "nsProxyRelease.h"
+#include "nsIObserverService.h"
+#include "nsIOutputStream.h"
+#include "nscore.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsITimer.h"
+#include "nsThreadUtils.h"
+#include "mozilla/Preferences.h"
+#include "nsContentUtils.h"
+#include "nsIPrincipal.h"
+#include "nsNativeCharsetUtils.h"
+#include "nsMimeTypes.h"
+#include "nsIMIMEService.h"
+#include "imgIEncoder.h"
+#include "imgITools.h"
+#include "WinUtils.h"
+#include "nsLocalFile.h"
+
+#include "mozilla/LazyIdleThread.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::glue;
+using namespace mozilla::widget;
+
+#define BFH_LENGTH 14
+#define DEFAULT_THREAD_TIMEOUT_MS 30000
+
+//-----------------------------------------------------------------------------
+// CStreamBase implementation
+nsDataObj::CStreamBase::CStreamBase() : mStreamRead(0) {}
+
+//-----------------------------------------------------------------------------
+nsDataObj::CStreamBase::~CStreamBase() {}
+
+NS_IMPL_ISUPPORTS(nsDataObj::CStream, nsIStreamListener)
+
+//-----------------------------------------------------------------------------
+// CStream implementation
+nsDataObj::CStream::CStream() : mChannelRead(false) {}
+
+//-----------------------------------------------------------------------------
+nsDataObj::CStream::~CStream() {}
+
+//-----------------------------------------------------------------------------
+// helper - initializes the stream
+nsresult nsDataObj::CStream::Init(nsIURI* pSourceURI,
+ nsContentPolicyType aContentPolicyType,
+ nsIPrincipal* aRequestingPrincipal,
+ nsICookieJarSettings* aCookieJarSettings,
+ nsIReferrerInfo* aReferrerInfo) {
+ // we can not create a channel without a requestingPrincipal
+ if (!aRequestingPrincipal) {
+ return NS_ERROR_FAILURE;
+ }
+ nsresult rv;
+ rv = NS_NewChannel(getter_AddRefs(mChannel), pSourceURI, aRequestingPrincipal,
+ nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT,
+ aContentPolicyType, aCookieJarSettings,
+ nullptr, // PerformanceStorage
+ nullptr, // loadGroup
+ nullptr, // aCallbacks
+ nsIRequest::LOAD_FROM_CACHE);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel)) {
+ rv = httpChannel->SetReferrerInfo(aReferrerInfo);
+ Unused << NS_WARN_IF(NS_FAILED(rv));
+ }
+
+ rv = mChannel->AsyncOpen(this);
+ NS_ENSURE_SUCCESS(rv, rv);
+ return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// IUnknown's QueryInterface, nsISupport's AddRef and Release are shared by
+// IUnknown and nsIStreamListener.
+STDMETHODIMP nsDataObj::CStream::QueryInterface(REFIID refiid,
+ void** ppvResult) {
+ *ppvResult = nullptr;
+ if (IID_IUnknown == refiid || refiid == IID_IStream)
+
+ {
+ *ppvResult = this;
+ }
+
+ if (nullptr != *ppvResult) {
+ ((LPUNKNOWN)*ppvResult)->AddRef();
+ return S_OK;
+ }
+
+ return E_NOINTERFACE;
+}
+
+// nsIStreamListener implementation
+NS_IMETHODIMP
+nsDataObj::CStream::OnDataAvailable(
+ nsIRequest* aRequest, nsIInputStream* aInputStream,
+ uint64_t aOffset, // offset within the stream
+ uint32_t aCount) // bytes available on this call
+{
+ // If we've been asked to read zero bytes, call `Read` once, just to ensure
+ // any side-effects take place, and return immediately.
+ if (aCount == 0) {
+ char buffer[1] = {0};
+ uint32_t bytesReadByCall = 0;
+ nsresult rv = aInputStream->Read(buffer, 0, &bytesReadByCall);
+ MOZ_ASSERT(bytesReadByCall == 0);
+ return rv;
+ }
+
+ // Extend the write buffer for the incoming data.
+ size_t oldLength = mChannelData.Length();
+ char* buffer =
+ reinterpret_cast<char*>(mChannelData.AppendElements(aCount, fallible));
+ if (!buffer) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ MOZ_ASSERT(mChannelData.Length() == (aOffset + aCount),
+ "stream length mismatch w/write buffer");
+
+ // Read() may not return aCount on a single call, so loop until we've
+ // accumulated all the data OnDataAvailable has promised.
+ uint32_t bytesRead = 0;
+ while (bytesRead < aCount) {
+ uint32_t bytesReadByCall = 0;
+ nsresult rv = aInputStream->Read(buffer + bytesRead, aCount - bytesRead,
+ &bytesReadByCall);
+ bytesRead += bytesReadByCall;
+
+ if (bytesReadByCall == 0) {
+ // A `bytesReadByCall` of zero indicates EOF without failure... but we
+ // were promised `aCount` elements and haven't gotten them. Return a
+ // generic failure.
+ rv = NS_ERROR_FAILURE;
+ }
+
+ if (NS_FAILED(rv)) {
+ // Drop any trailing uninitialized elements before erroring out.
+ mChannelData.RemoveElementsAt(oldLength + bytesRead, aCount - bytesRead);
+ return rv;
+ }
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsDataObj::CStream::OnStartRequest(nsIRequest* aRequest) {
+ mChannelResult = NS_OK;
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsDataObj::CStream::OnStopRequest(nsIRequest* aRequest,
+ nsresult aStatusCode) {
+ mChannelRead = true;
+ mChannelResult = aStatusCode;
+ return NS_OK;
+}
+
+// Pumps thread messages while waiting for the async listener operation to
+// complete. Failing this call will fail the stream incall from Windows
+// and cancel the operation.
+nsresult nsDataObj::CStream::WaitForCompletion() {
+ // We are guaranteed OnStopRequest will get called, so this should be ok.
+ SpinEventLoopUntil("widget:nsDataObj::CStream::WaitForCompletion"_ns,
+ [&]() { return mChannelRead; });
+
+ if (!mChannelData.Length()) mChannelResult = NS_ERROR_FAILURE;
+
+ return mChannelResult;
+}
+
+//-----------------------------------------------------------------------------
+// IStream
+STDMETHODIMP nsDataObj::CStreamBase::Clone(IStream** ppStream) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::Commit(DWORD dwFrags) { return E_NOTIMPL; }
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::CopyTo(IStream* pDestStream,
+ ULARGE_INTEGER nBytesToCopy,
+ ULARGE_INTEGER* nBytesRead,
+ ULARGE_INTEGER* nBytesWritten) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::LockRegion(ULARGE_INTEGER nStart,
+ ULARGE_INTEGER nBytes,
+ DWORD dwFlags) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStream::Read(void* pvBuffer, ULONG nBytesToRead,
+ ULONG* nBytesRead) {
+ // Wait for the write into our buffer to complete via the stream listener.
+ // We can't respond to this by saying "call us back later".
+ if (NS_FAILED(WaitForCompletion())) return E_FAIL;
+
+ // Bytes left for Windows to read out of our buffer
+ ULONG bytesLeft = mChannelData.Length() - mStreamRead;
+ // Let Windows know what we will hand back, usually this is the entire buffer
+ *nBytesRead = std::min(bytesLeft, nBytesToRead);
+ // Copy the buffer data over
+ memcpy(pvBuffer, ((char*)mChannelData.Elements() + mStreamRead), *nBytesRead);
+ // Update our bytes read tracking
+ mStreamRead += *nBytesRead;
+ return S_OK;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::Revert(void) { return E_NOTIMPL; }
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::Seek(LARGE_INTEGER nMove, DWORD dwOrigin,
+ ULARGE_INTEGER* nNewPos) {
+ if (nNewPos == nullptr) return STG_E_INVALIDPOINTER;
+
+ if (nMove.LowPart == 0 && nMove.HighPart == 0 &&
+ (dwOrigin == STREAM_SEEK_SET || dwOrigin == STREAM_SEEK_CUR)) {
+ nNewPos->LowPart = 0;
+ nNewPos->HighPart = 0;
+ return S_OK;
+ }
+
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::SetSize(ULARGE_INTEGER nNewSize) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStream::Stat(STATSTG* statstg, DWORD dwFlags) {
+ if (statstg == nullptr) return STG_E_INVALIDPOINTER;
+
+ if (!mChannel || NS_FAILED(WaitForCompletion())) return E_FAIL;
+
+ memset((void*)statstg, 0, sizeof(STATSTG));
+
+ if (dwFlags != STATFLAG_NONAME) {
+ nsCOMPtr<nsIURI> sourceURI;
+ if (NS_FAILED(mChannel->GetURI(getter_AddRefs(sourceURI)))) {
+ return E_FAIL;
+ }
+
+ nsAutoCString strFileName;
+ nsCOMPtr<nsIURL> sourceURL = do_QueryInterface(sourceURI);
+ sourceURL->GetFileName(strFileName);
+
+ if (strFileName.IsEmpty()) return E_FAIL;
+
+ NS_UnescapeURL(strFileName);
+ NS_ConvertUTF8toUTF16 wideFileName(strFileName);
+
+ uint32_t nMaxNameLength = (wideFileName.Length() * 2) + 2;
+ void* retBuf = CoTaskMemAlloc(nMaxNameLength); // freed by caller
+ if (!retBuf) return STG_E_INSUFFICIENTMEMORY;
+
+ ZeroMemory(retBuf, nMaxNameLength);
+ memcpy(retBuf, wideFileName.get(), wideFileName.Length() * 2);
+ statstg->pwcsName = (LPOLESTR)retBuf;
+ }
+
+ SYSTEMTIME st;
+
+ statstg->type = STGTY_STREAM;
+
+ GetSystemTime(&st);
+ SystemTimeToFileTime((const SYSTEMTIME*)&st, (LPFILETIME)&statstg->mtime);
+ statstg->ctime = statstg->atime = statstg->mtime;
+
+ statstg->cbSize.QuadPart = mChannelData.Length();
+ statstg->grfMode = STGM_READ;
+ statstg->grfLocksSupported = LOCK_ONLYONCE;
+ statstg->clsid = CLSID_NULL;
+
+ return S_OK;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::UnlockRegion(ULARGE_INTEGER nStart,
+ ULARGE_INTEGER nBytes,
+ DWORD dwFlags) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CStreamBase::Write(const void* pvBuffer,
+ ULONG nBytesToRead,
+ ULONG* nBytesRead) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------------------------------
+HRESULT nsDataObj::CreateStream(IStream** outStream) {
+ NS_ENSURE_TRUE(outStream, E_INVALIDARG);
+
+ nsresult rv = NS_ERROR_FAILURE;
+ nsAutoString wideFileName;
+ nsCOMPtr<nsIURI> sourceURI;
+ HRESULT res;
+
+ res = GetDownloadDetails(getter_AddRefs(sourceURI), wideFileName);
+ if (FAILED(res)) return res;
+
+ nsDataObj::CStream* pStream = new nsDataObj::CStream();
+ NS_ENSURE_TRUE(pStream, E_OUTOFMEMORY);
+
+ pStream->AddRef();
+
+ // query the requestingPrincipal from the transferable and add it to the new
+ // channel
+ nsCOMPtr<nsIPrincipal> requestingPrincipal =
+ mTransferable->GetRequestingPrincipal();
+ MOZ_ASSERT(requestingPrincipal, "can not create channel without a principal");
+
+ // Note that the cookieJarSettings could be null if the data object is for the
+ // image copy. We will fix this in Bug 1690532.
+ nsCOMPtr<nsICookieJarSettings> cookieJarSettings =
+ mTransferable->GetCookieJarSettings();
+
+ // The referrer is optional.
+ nsCOMPtr<nsIReferrerInfo> referrerInfo = mTransferable->GetReferrerInfo();
+
+ nsContentPolicyType contentPolicyType = mTransferable->GetContentPolicyType();
+ rv = pStream->Init(sourceURI, contentPolicyType, requestingPrincipal,
+ cookieJarSettings, referrerInfo);
+ if (NS_FAILED(rv)) {
+ pStream->Release();
+ return E_FAIL;
+ }
+ *outStream = pStream;
+
+ return S_OK;
+}
+
+//-----------------------------------------------------------------------------
+// AutoCloseEvent implementation
+nsDataObj::AutoCloseEvent::AutoCloseEvent()
+ : mEvent(::CreateEventW(nullptr, TRUE, FALSE, nullptr)) {}
+
+bool nsDataObj::AutoCloseEvent::IsInited() const { return !!mEvent; }
+
+void nsDataObj::AutoCloseEvent::Signal() const { ::SetEvent(mEvent); }
+
+DWORD nsDataObj::AutoCloseEvent::Wait(DWORD aMillisec) const {
+ return ::WaitForSingleObject(mEvent, aMillisec);
+}
+
+//-----------------------------------------------------------------------------
+// AutoSetEvent implementation
+nsDataObj::AutoSetEvent::AutoSetEvent(NotNull<AutoCloseEvent*> aEvent)
+ : mEvent(aEvent) {}
+
+nsDataObj::AutoSetEvent::~AutoSetEvent() { Signal(); }
+
+void nsDataObj::AutoSetEvent::Signal() const { mEvent->Signal(); }
+
+bool nsDataObj::AutoSetEvent::IsWaiting() const {
+ return mEvent->Wait(0) == WAIT_TIMEOUT;
+}
+
+//-----------------------------------------------------------------------------
+// CMemStream implementation
+Win32SRWLock nsDataObj::CMemStream::mLock;
+
+//-----------------------------------------------------------------------------
+nsDataObj::CMemStream::CMemStream(nsHGLOBAL aGlobalMem, uint32_t aTotalLength,
+ already_AddRefed<AutoCloseEvent> aEvent)
+ : mGlobalMem(aGlobalMem), mEvent(aEvent), mTotalLength(aTotalLength) {
+ ::CoCreateFreeThreadedMarshaler(this, getter_AddRefs(mMarshaler));
+}
+
+//-----------------------------------------------------------------------------
+nsDataObj::CMemStream::~CMemStream() {}
+
+//-----------------------------------------------------------------------------
+// IUnknown
+STDMETHODIMP nsDataObj::CMemStream::QueryInterface(REFIID refiid,
+ void** ppvResult) {
+ *ppvResult = nullptr;
+ if (refiid == IID_IUnknown || refiid == IID_IStream ||
+ refiid == IID_IAgileObject) {
+ *ppvResult = this;
+ } else if (refiid == IID_IMarshal && mMarshaler) {
+ return mMarshaler->QueryInterface(refiid, ppvResult);
+ }
+
+ if (nullptr != *ppvResult) {
+ ((LPUNKNOWN)*ppvResult)->AddRef();
+ return S_OK;
+ }
+
+ return E_NOINTERFACE;
+}
+
+void nsDataObj::CMemStream::WaitForCompletion() {
+ if (!mEvent) {
+ // We are not waiting for obtaining the icon cache.
+ return;
+ }
+ if (!NS_IsMainThread()) {
+ mEvent->Wait(INFINITE);
+ } else {
+ // We should not block the main thread.
+ mEvent->Signal();
+ }
+ // mEvent will always be in the signaled state here.
+}
+
+//-----------------------------------------------------------------------------
+// IStream
+STDMETHODIMP nsDataObj::CMemStream::Read(void* pvBuffer, ULONG nBytesToRead,
+ ULONG* nBytesRead) {
+ // Wait until the event is signaled.
+ WaitForCompletion();
+
+ AutoExclusiveLock lock(mLock);
+ char* contents = reinterpret_cast<char*>(GlobalLock(mGlobalMem.get()));
+ if (!contents) {
+ return E_OUTOFMEMORY;
+ }
+
+ // Bytes left for Windows to read out of our buffer
+ ULONG bytesLeft = mTotalLength - mStreamRead;
+ // Let Windows know what we will hand back, usually this is the entire buffer
+ *nBytesRead = std::min(bytesLeft, nBytesToRead);
+ // Copy the buffer data over
+ memcpy(pvBuffer, contents + mStreamRead, *nBytesRead);
+ // Update our bytes read tracking
+ mStreamRead += *nBytesRead;
+
+ GlobalUnlock(mGlobalMem.get());
+ return S_OK;
+}
+
+//-----------------------------------------------------------------------------
+STDMETHODIMP nsDataObj::CMemStream::Stat(STATSTG* statstg, DWORD dwFlags) {
+ if (statstg == nullptr) return STG_E_INVALIDPOINTER;
+
+ memset((void*)statstg, 0, sizeof(STATSTG));
+
+ if (dwFlags != STATFLAG_NONAME) {
+ constexpr size_t kMaxNameLength = sizeof(wchar_t);
+ void* retBuf = CoTaskMemAlloc(kMaxNameLength); // freed by caller
+ if (!retBuf) return STG_E_INSUFFICIENTMEMORY;
+
+ ZeroMemory(retBuf, kMaxNameLength);
+ statstg->pwcsName = (LPOLESTR)retBuf;
+ }
+
+ SYSTEMTIME st;
+
+ statstg->type = STGTY_STREAM;
+
+ GetSystemTime(&st);
+ SystemTimeToFileTime((const SYSTEMTIME*)&st, (LPFILETIME)&statstg->mtime);
+ statstg->ctime = statstg->atime = statstg->mtime;
+
+ statstg->cbSize.QuadPart = mTotalLength;
+ statstg->grfMode = STGM_READ;
+ statstg->grfLocksSupported = LOCK_ONLYONCE;
+ statstg->clsid = CLSID_NULL;
+
+ return S_OK;
+}
+
+/*
+ * Class nsDataObj
+ */
+
+//-----------------------------------------------------
+// construction
+//-----------------------------------------------------
+nsDataObj::nsDataObj(nsIURI* uri)
+ : m_cRef(0),
+ mTransferable(nullptr),
+ mIsAsyncMode(FALSE),
+ mIsInOperation(FALSE) {
+ mIOThread = new LazyIdleThread(DEFAULT_THREAD_TIMEOUT_MS, "nsDataObj",
+ LazyIdleThread::ManualShutdown);
+ m_enumFE = new CEnumFormatEtc();
+ m_enumFE->AddRef();
+
+ if (uri) {
+ // A URI was obtained, so pass this through to the DataObject
+ // so it can create a SourceURL for CF_HTML flavour
+ uri->GetSpec(mSourceURL);
+ }
+}
+//-----------------------------------------------------
+// destruction
+//-----------------------------------------------------
+nsDataObj::~nsDataObj() {
+ NS_IF_RELEASE(mTransferable);
+
+ mDataFlavors.Clear();
+
+ m_enumFE->Release();
+
+ // Free arbitrary system formats
+ for (uint32_t idx = 0; idx < mDataEntryList.Length(); idx++) {
+ CoTaskMemFree(mDataEntryList[idx]->fe.ptd);
+ ReleaseStgMedium(&mDataEntryList[idx]->stgm);
+ CoTaskMemFree(mDataEntryList[idx]);
+ }
+}
+
+//-----------------------------------------------------
+// IUnknown interface methods - see inknown.h for documentation
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::QueryInterface(REFIID riid, void** ppv) {
+ *ppv = nullptr;
+
+ if ((IID_IUnknown == riid) || (IID_IDataObject == riid)) {
+ *ppv = this;
+ AddRef();
+ return S_OK;
+ } else if (IID_IDataObjectAsyncCapability == riid) {
+ *ppv = static_cast<IDataObjectAsyncCapability*>(this);
+ AddRef();
+ return S_OK;
+ }
+
+ return E_NOINTERFACE;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP_(ULONG) nsDataObj::AddRef() {
+ ++m_cRef;
+ NS_LOG_ADDREF(this, m_cRef, "nsDataObj", sizeof(*this));
+
+ // When the first reference is taken, hold our own internal reference.
+ if (m_cRef == 1) {
+ mKeepAlive = this;
+ }
+
+ return m_cRef;
+}
+
+namespace {
+class RemoveTempFileHelper final : public nsIObserver, public nsINamed {
+ public:
+ explicit RemoveTempFileHelper(nsIFile* aTempFile) : mTempFile(aTempFile) {
+ MOZ_ASSERT(mTempFile);
+ }
+
+ // The attach method is seperate from the constructor as we may be addref-ing
+ // ourself, and we want to be sure someone has a strong reference to us.
+ void Attach() {
+ // We need to listen to both the xpcom shutdown message and our timer, and
+ // fire when the first of either of these two messages is received.
+ nsresult rv;
+ rv = NS_NewTimerWithObserver(getter_AddRefs(mTimer), this, 500,
+ nsITimer::TYPE_ONE_SHOT);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return;
+ }
+
+ nsCOMPtr<nsIObserverService> observerService =
+ do_GetService("@mozilla.org/observer-service;1");
+ if (NS_WARN_IF(!observerService)) {
+ mTimer->Cancel();
+ mTimer = nullptr;
+ return;
+ }
+ observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
+ }
+
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIOBSERVER
+ NS_DECL_NSINAMED
+
+ private:
+ ~RemoveTempFileHelper() {
+ if (mTempFile) {
+ mTempFile->Remove(false);
+ }
+ }
+
+ nsCOMPtr<nsIFile> mTempFile;
+ nsCOMPtr<nsITimer> mTimer;
+};
+
+NS_IMPL_ISUPPORTS(RemoveTempFileHelper, nsIObserver, nsINamed);
+
+NS_IMETHODIMP
+RemoveTempFileHelper::Observe(nsISupports* aSubject, const char* aTopic,
+ const char16_t* aData) {
+ // Let's be careful and make sure that we don't die immediately
+ RefPtr<RemoveTempFileHelper> grip = this;
+
+ // Make sure that we aren't called again by destroying references to ourself.
+ nsCOMPtr<nsIObserverService> observerService =
+ do_GetService("@mozilla.org/observer-service;1");
+ if (observerService) {
+ observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
+ }
+
+ if (mTimer) {
+ mTimer->Cancel();
+ mTimer = nullptr;
+ }
+
+ // Remove the tempfile
+ if (mTempFile) {
+ mTempFile->Remove(false);
+ mTempFile = nullptr;
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+RemoveTempFileHelper::GetName(nsACString& aName) {
+ aName.AssignLiteral("RemoveTempFileHelper");
+ return NS_OK;
+}
+} // namespace
+
+//-----------------------------------------------------
+STDMETHODIMP_(ULONG) nsDataObj::Release() {
+ --m_cRef;
+
+ NS_LOG_RELEASE(this, m_cRef, "nsDataObj");
+
+ // If we hold the last reference, submit release of it to the main thread.
+ if (m_cRef == 1 && mKeepAlive) {
+ NS_ReleaseOnMainThread("nsDataObj release", mKeepAlive.forget(), true);
+ }
+
+ if (0 != m_cRef) return m_cRef;
+
+ // We have released our last ref on this object and need to delete the
+ // temp file. External app acting as drop target may still need to open the
+ // temp file. Addref a timer so it can delay deleting file and destroying
+ // this object.
+ if (mCachedTempFile) {
+ RefPtr<RemoveTempFileHelper> helper =
+ new RemoveTempFileHelper(mCachedTempFile);
+ mCachedTempFile = nullptr;
+ helper->Attach();
+ }
+
+ // In case the destructor ever AddRef/Releases, ensure we don't delete twice
+ // or take mKeepAlive as another reference.
+ m_cRef = 1;
+
+ delete this;
+
+ return 0;
+}
+
+//-----------------------------------------------------
+BOOL nsDataObj::FormatsMatch(const FORMATETC& source,
+ const FORMATETC& target) const {
+ if ((source.cfFormat == target.cfFormat) &&
+ (source.dwAspect & target.dwAspect) && (source.tymed & target.tymed)) {
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
+//-----------------------------------------------------
+// IDataObject methods
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::GetData(LPFORMATETC aFormat, LPSTGMEDIUM pSTM) {
+ if (!mTransferable) return DV_E_FORMATETC;
+
+ // Hold an extra reference in case we end up spinning the event loop.
+ RefPtr<nsDataObj> keepAliveDuringGetData(this);
+
+ uint32_t dfInx = 0;
+
+ static CLIPFORMAT fileDescriptorFlavorA =
+ ::RegisterClipboardFormat(CFSTR_FILEDESCRIPTORA);
+ static CLIPFORMAT fileDescriptorFlavorW =
+ ::RegisterClipboardFormat(CFSTR_FILEDESCRIPTORW);
+ static CLIPFORMAT uniformResourceLocatorA =
+ ::RegisterClipboardFormat(CFSTR_INETURLA);
+ static CLIPFORMAT uniformResourceLocatorW =
+ ::RegisterClipboardFormat(CFSTR_INETURLW);
+ static CLIPFORMAT fileFlavor = ::RegisterClipboardFormat(CFSTR_FILECONTENTS);
+ static CLIPFORMAT PreferredDropEffect =
+ ::RegisterClipboardFormat(CFSTR_PREFERREDDROPEFFECT);
+
+ // Arbitrary system formats are used for image feedback during drag
+ // and drop. We are responsible for storing these internally during
+ // drag operations.
+ LPDATAENTRY pde;
+ if (LookupArbitraryFormat(aFormat, &pde, FALSE)) {
+ return CopyMediumData(pSTM, &pde->stgm, aFormat, FALSE) ? S_OK
+ : E_UNEXPECTED;
+ }
+
+ // Firefox internal formats
+ ULONG count;
+ FORMATETC fe;
+ m_enumFE->Reset();
+ while (NOERROR == m_enumFE->Next(1, &fe, &count) &&
+ dfInx < mDataFlavors.Length()) {
+ nsCString& df = mDataFlavors.ElementAt(dfInx);
+ if (FormatsMatch(fe, *aFormat)) {
+ pSTM->pUnkForRelease =
+ nullptr; // caller is responsible for deleting this data
+ CLIPFORMAT format = aFormat->cfFormat;
+ switch (format) {
+ // Someone is asking for plain or unicode text
+ case CF_TEXT:
+ case CF_UNICODETEXT:
+ return GetText(df, *aFormat, *pSTM);
+
+ // Some 3rd party apps that receive drag and drop files from the browser
+ // window require support for this.
+ case CF_HDROP:
+ return GetFile(*aFormat, *pSTM);
+
+ // Someone is asking for an image
+ case CF_DIBV5:
+ case CF_DIB:
+ return GetDib(df, *aFormat, *pSTM);
+
+ default:
+ if (format == fileDescriptorFlavorA)
+ return GetFileDescriptor(*aFormat, *pSTM, false);
+ if (format == fileDescriptorFlavorW)
+ return GetFileDescriptor(*aFormat, *pSTM, true);
+ if (format == uniformResourceLocatorA)
+ return GetUniformResourceLocator(*aFormat, *pSTM, false);
+ if (format == uniformResourceLocatorW)
+ return GetUniformResourceLocator(*aFormat, *pSTM, true);
+ if (format == fileFlavor) return GetFileContents(*aFormat, *pSTM);
+ if (format == PreferredDropEffect)
+ return GetPreferredDropEffect(*aFormat, *pSTM);
+ // MOZ_LOG(gWindowsLog, LogLevel::Info,
+ // ("***** nsDataObj::GetData - Unknown format %u\n", format));
+ return GetText(df, *aFormat, *pSTM);
+ } // switch
+ } // if
+ dfInx++;
+ } // while
+
+ return DATA_E_FORMATETC;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pSTM) {
+ return E_FAIL;
+}
+
+//-----------------------------------------------------
+// Other objects querying to see if we support a
+// particular format
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::QueryGetData(LPFORMATETC pFE) {
+ // Arbitrary system formats are used for image feedback during drag
+ // and drop. We are responsible for storing these internally during
+ // drag operations.
+ LPDATAENTRY pde;
+ if (LookupArbitraryFormat(pFE, &pde, FALSE)) return S_OK;
+
+ // Firefox internal formats
+ ULONG count;
+ FORMATETC fe;
+ m_enumFE->Reset();
+ while (NOERROR == m_enumFE->Next(1, &fe, &count)) {
+ if (fe.cfFormat == pFE->cfFormat) {
+ return S_OK;
+ }
+ }
+ return E_FAIL;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::GetCanonicalFormatEtc(LPFORMATETC pFEIn,
+ LPFORMATETC pFEOut) {
+ return E_NOTIMPL;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::SetData(LPFORMATETC aFormat, LPSTGMEDIUM aMedium,
+ BOOL shouldRel) {
+ // Arbitrary system formats are used for image feedback during drag
+ // and drop. We are responsible for storing these internally during
+ // drag operations.
+ LPDATAENTRY pde;
+ if (LookupArbitraryFormat(aFormat, &pde, TRUE)) {
+ // Release the old data the lookup handed us for this format. This
+ // may have been set in CopyMediumData when we originally stored the
+ // data.
+ if (pde->stgm.tymed) {
+ ReleaseStgMedium(&pde->stgm);
+ memset(&pde->stgm, 0, sizeof(STGMEDIUM));
+ }
+
+ bool result = true;
+ if (shouldRel) {
+ // If shouldRel is TRUE, the data object called owns the storage medium
+ // after the call returns. Store the incoming data in our data array for
+ // release when we are destroyed. This is the common case with arbitrary
+ // data from explorer.
+ pde->stgm = *aMedium;
+ } else {
+ // Copy the incoming data into our data array. (AFAICT, this never gets
+ // called with arbitrary formats for drag images.)
+ result = CopyMediumData(&pde->stgm, aMedium, aFormat, TRUE);
+ }
+ pde->fe.tymed = pde->stgm.tymed;
+
+ return result ? S_OK : DV_E_TYMED;
+ }
+
+ if (shouldRel) ReleaseStgMedium(aMedium);
+
+ return S_OK;
+}
+
+bool nsDataObj::LookupArbitraryFormat(FORMATETC* aFormat,
+ LPDATAENTRY* aDataEntry,
+ BOOL aAddorUpdate) {
+ *aDataEntry = nullptr;
+
+ if (aFormat->ptd != nullptr) return false;
+
+ // See if it's already in our list. If so return the data entry.
+ for (uint32_t idx = 0; idx < mDataEntryList.Length(); idx++) {
+ if (mDataEntryList[idx]->fe.cfFormat == aFormat->cfFormat &&
+ mDataEntryList[idx]->fe.dwAspect == aFormat->dwAspect &&
+ mDataEntryList[idx]->fe.lindex == aFormat->lindex) {
+ if (aAddorUpdate || (mDataEntryList[idx]->fe.tymed & aFormat->tymed)) {
+ // If the caller requests we update, or if the
+ // medium type matches, return the entry.
+ *aDataEntry = mDataEntryList[idx];
+ return true;
+ } else {
+ // Medium does not match, not found.
+ return false;
+ }
+ }
+ }
+
+ if (!aAddorUpdate) return false;
+
+ // Add another entry to mDataEntryList
+ LPDATAENTRY dataEntry = (LPDATAENTRY)CoTaskMemAlloc(sizeof(DATAENTRY));
+ if (!dataEntry) return false;
+
+ dataEntry->fe = *aFormat;
+ *aDataEntry = dataEntry;
+ memset(&dataEntry->stgm, 0, sizeof(STGMEDIUM));
+
+ // Add this to our IEnumFORMATETC impl. so we can return it when
+ // it's requested.
+ m_enumFE->AddFormatEtc(aFormat);
+
+ // Store a copy internally in the arbitrary formats array.
+ mDataEntryList.AppendElement(dataEntry);
+
+ return true;
+}
+
+bool nsDataObj::CopyMediumData(STGMEDIUM* aMediumDst, STGMEDIUM* aMediumSrc,
+ LPFORMATETC aFormat, BOOL aSetData) {
+ STGMEDIUM stgmOut = *aMediumSrc;
+
+ switch (stgmOut.tymed) {
+ case TYMED_ISTREAM:
+ stgmOut.pstm->AddRef();
+ break;
+ case TYMED_ISTORAGE:
+ stgmOut.pstg->AddRef();
+ break;
+ case TYMED_HGLOBAL:
+ if (!aMediumSrc->pUnkForRelease) {
+ if (aSetData) {
+ if (aMediumSrc->tymed != TYMED_HGLOBAL) return false;
+ stgmOut.hGlobal =
+ OleDuplicateData(aMediumSrc->hGlobal, aFormat->cfFormat, 0);
+ if (!stgmOut.hGlobal) return false;
+ } else {
+ // We are returning this data from LookupArbitraryFormat, indicate to
+ // the shell we hold it and will free it.
+ stgmOut.pUnkForRelease = static_cast<IDataObject*>(this);
+ }
+ }
+ break;
+ default:
+ return false;
+ }
+
+ if (stgmOut.pUnkForRelease) stgmOut.pUnkForRelease->AddRef();
+
+ *aMediumDst = stgmOut;
+
+ return true;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::EnumFormatEtc(DWORD dwDir, LPENUMFORMATETC* ppEnum) {
+ switch (dwDir) {
+ case DATADIR_GET:
+ m_enumFE->Clone(ppEnum);
+ break;
+ case DATADIR_SET:
+ // fall through
+ default:
+ *ppEnum = nullptr;
+ } // switch
+
+ if (nullptr == *ppEnum) return E_FAIL;
+
+ (*ppEnum)->Reset();
+ // Clone already AddRefed the result so don't addref it again.
+ return NOERROR;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::DAdvise(LPFORMATETC pFE, DWORD dwFlags,
+ LPADVISESINK pIAdviseSink, DWORD* pdwConn) {
+ return OLE_E_ADVISENOTSUPPORTED;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::DUnadvise(DWORD dwConn) {
+ return OLE_E_ADVISENOTSUPPORTED;
+}
+
+//-----------------------------------------------------
+STDMETHODIMP nsDataObj::EnumDAdvise(LPENUMSTATDATA* ppEnum) {
+ return OLE_E_ADVISENOTSUPPORTED;
+}
+
+// IDataObjectAsyncCapability methods
+STDMETHODIMP nsDataObj::EndOperation(HRESULT hResult, IBindCtx* pbcReserved,
+ DWORD dwEffects) {
+ mIsInOperation = FALSE;
+ return S_OK;
+}
+
+STDMETHODIMP nsDataObj::GetAsyncMode(BOOL* pfIsOpAsync) {
+ *pfIsOpAsync = mIsAsyncMode;
+
+ return S_OK;
+}
+
+STDMETHODIMP nsDataObj::InOperation(BOOL* pfInAsyncOp) {
+ *pfInAsyncOp = mIsInOperation;
+
+ return S_OK;
+}
+
+STDMETHODIMP nsDataObj::SetAsyncMode(BOOL fDoOpAsync) {
+ mIsAsyncMode = fDoOpAsync;
+ return S_OK;
+}
+
+STDMETHODIMP nsDataObj::StartOperation(IBindCtx* pbcReserved) {
+ mIsInOperation = TRUE;
+ return S_OK;
+}
+
+//
+// GetDIB
+//
+// Someone is asking for a bitmap. The data in the transferable will be a
+// straight imgIContainer, so just QI it.
+//
+HRESULT
+nsDataObj::GetDib(const nsACString& inFlavor, FORMATETC& aFormat,
+ STGMEDIUM& aSTG) {
+ nsCOMPtr<nsISupports> genericDataWrapper;
+ if (NS_FAILED(
+ mTransferable->GetTransferData(PromiseFlatCString(inFlavor).get(),
+ getter_AddRefs(genericDataWrapper)))) {
+ return E_FAIL;
+ }
+
+ nsCOMPtr<imgIContainer> image = do_QueryInterface(genericDataWrapper);
+ if (!image) {
+ return E_FAIL;
+ }
+
+ nsCOMPtr<imgITools> imgTools =
+ do_CreateInstance("@mozilla.org/image/tools;1");
+
+ nsAutoString options(u"bpp=32;"_ns);
+ if (aFormat.cfFormat == CF_DIBV5) {
+ options.AppendLiteral("version=5");
+ } else {
+ options.AppendLiteral("version=3");
+ }
+
+ nsCOMPtr<nsIInputStream> inputStream;
+ nsresult rv = imgTools->EncodeImage(image, nsLiteralCString(IMAGE_BMP),
+ options, getter_AddRefs(inputStream));
+ if (NS_FAILED(rv) || !inputStream) {
+ return E_FAIL;
+ }
+
+ nsCOMPtr<imgIEncoder> encoder = do_QueryInterface(inputStream);
+ if (!encoder) {
+ return E_FAIL;
+ }
+
+ uint32_t size = 0;
+ rv = encoder->GetImageBufferUsed(&size);
+ if (NS_FAILED(rv) || size <= BFH_LENGTH) {
+ return E_FAIL;
+ }
+
+ char* src = nullptr;
+ rv = encoder->GetImageBuffer(&src);
+ if (NS_FAILED(rv) || !src) {
+ return E_FAIL;
+ }
+
+ // We don't want the file header.
+ src += BFH_LENGTH;
+ size -= BFH_LENGTH;
+
+ HGLOBAL glob = ::GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, size);
+ if (!glob) {
+ return E_FAIL;
+ }
+
+ char* dst = (char*)::GlobalLock(glob);
+ ::CopyMemory(dst, src, size);
+ ::GlobalUnlock(glob);
+
+ aSTG.hGlobal = glob;
+ aSTG.tymed = TYMED_HGLOBAL;
+ return S_OK;
+}
+
+//
+// GetFileDescriptor
+//
+
+HRESULT
+nsDataObj ::GetFileDescriptor(FORMATETC& aFE, STGMEDIUM& aSTG,
+ bool aIsUnicode) {
+ HRESULT res = S_OK;
+
+ // How we handle this depends on if we're dealing with an internet
+ // shortcut, since those are done under the covers.
+ if (IsFlavourPresent(kFilePromiseMime) || IsFlavourPresent(kFileMime)) {
+ if (aIsUnicode)
+ return GetFileDescriptor_IStreamW(aFE, aSTG);
+ else
+ return GetFileDescriptor_IStreamA(aFE, aSTG);
+ } else if (IsFlavourPresent(kURLMime)) {
+ if (aIsUnicode)
+ res = GetFileDescriptorInternetShortcutW(aFE, aSTG);
+ else
+ res = GetFileDescriptorInternetShortcutA(aFE, aSTG);
+ } else
+ NS_WARNING("Not yet implemented\n");
+
+ return res;
+} // GetFileDescriptor
+
+//
+HRESULT
+nsDataObj ::GetFileContents(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ HRESULT res = S_OK;
+
+ // How we handle this depends on if we're dealing with an internet
+ // shortcut, since those are done under the covers.
+ if (IsFlavourPresent(kFilePromiseMime) || IsFlavourPresent(kFileMime))
+ return GetFileContents_IStream(aFE, aSTG);
+ else if (IsFlavourPresent(kURLMime))
+ return GetFileContentsInternetShortcut(aFE, aSTG);
+ else
+ NS_WARNING("Not yet implemented\n");
+
+ return res;
+
+} // GetFileContents
+
+// Ensure that the supplied name doesn't have invalid characters.
+static void ValidateFilename(nsString& aFilename, bool isShortcut) {
+ nsCOMPtr<nsIMIMEService> mimeService = do_GetService("@mozilla.org/mime;1");
+ if (NS_WARN_IF(!mimeService)) {
+ aFilename.Truncate();
+ return;
+ }
+
+ uint32_t flags = nsIMIMEService::VALIDATE_SANITIZE_ONLY;
+ if (isShortcut) {
+ flags |= nsIMIMEService::VALIDATE_ALLOW_INVALID_FILENAMES;
+ }
+
+ nsAutoString outFilename;
+ mimeService->ValidateFileNameForSaving(aFilename, EmptyCString(), flags,
+ outFilename);
+ aFilename = outFilename;
+}
+
+//
+// Given a unicode string, convert it to a valid local charset filename
+// and append the .url extension to be used for a shortcut file.
+// This ensures that we do not cut MBCS characters in the middle.
+//
+// It would seem that this is more functionality suited to being in nsIFile.
+//
+static bool CreateURLFilenameFromTextA(nsAutoString& aText, char* aFilename) {
+ if (aText.IsEmpty()) {
+ return false;
+ }
+ aText.AppendLiteral(".url");
+ ValidateFilename(aText, true);
+ if (aText.IsEmpty()) {
+ return false;
+ }
+
+ // ValidateFilename should already be checking the filename length, but do
+ // an extra check to verify for the local code page that the converted text
+ // doesn't go over MAX_PATH and just return false if it does.
+ char defaultChar = '_';
+ int currLen = WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK | WC_DEFAULTCHAR,
+ aText.get(), -1, aFilename, MAX_PATH,
+ &defaultChar, nullptr);
+ return currLen != 0;
+}
+
+// Wide character version of CreateURLFilenameFromTextA
+static bool CreateURLFilenameFromTextW(nsAutoString& aText,
+ wchar_t* aFilename) {
+ if (aText.IsEmpty()) {
+ return false;
+ }
+ aText.AppendLiteral(".url");
+ ValidateFilename(aText, true);
+ if (aText.IsEmpty() || aText.Length() >= MAX_PATH) {
+ return false;
+ }
+
+ wcscpy(&aFilename[0], aText.get());
+ return true;
+}
+
+#define PAGEINFO_PROPERTIES "chrome://navigator/locale/pageInfo.properties"
+
+static bool GetLocalizedString(const char* aName, nsAString& aString) {
+ nsCOMPtr<nsIStringBundleService> stringService =
+ mozilla::components::StringBundle::Service();
+ if (!stringService) return false;
+
+ nsCOMPtr<nsIStringBundle> stringBundle;
+ nsresult rv = stringService->CreateBundle(PAGEINFO_PROPERTIES,
+ getter_AddRefs(stringBundle));
+ if (NS_FAILED(rv)) return false;
+
+ rv = stringBundle->GetStringFromName(aName, aString);
+ return NS_SUCCEEDED(rv);
+}
+
+//
+// GetFileDescriptorInternetShortcut
+//
+// Create the special format for an internet shortcut and build up the data
+// structures the shell is expecting.
+//
+HRESULT
+nsDataObj ::GetFileDescriptorInternetShortcutA(FORMATETC& aFE,
+ STGMEDIUM& aSTG) {
+ // get the title of the shortcut
+ nsAutoString title;
+ if (NS_FAILED(ExtractShortcutTitle(title))) return E_OUTOFMEMORY;
+
+ HGLOBAL fileGroupDescHandle =
+ ::GlobalAlloc(GMEM_ZEROINIT | GMEM_SHARE, sizeof(FILEGROUPDESCRIPTORA));
+ if (!fileGroupDescHandle) return E_OUTOFMEMORY;
+
+ LPFILEGROUPDESCRIPTORA fileGroupDescA =
+ reinterpret_cast<LPFILEGROUPDESCRIPTORA>(
+ ::GlobalLock(fileGroupDescHandle));
+ if (!fileGroupDescA) {
+ ::GlobalFree(fileGroupDescHandle);
+ return E_OUTOFMEMORY;
+ }
+
+ // get a valid filename in the following order: 1) from the page title,
+ // 2) localized string for an untitled page, 3) just use "Untitled.url"
+ if (!CreateURLFilenameFromTextA(title, fileGroupDescA->fgd[0].cFileName)) {
+ nsAutoString untitled;
+ if (!GetLocalizedString("noPageTitle", untitled) ||
+ !CreateURLFilenameFromTextA(untitled,
+ fileGroupDescA->fgd[0].cFileName)) {
+ strcpy(fileGroupDescA->fgd[0].cFileName, "Untitled.url");
+ }
+ }
+
+ // one file in the file block
+ fileGroupDescA->cItems = 1;
+ fileGroupDescA->fgd[0].dwFlags = FD_LINKUI;
+
+ ::GlobalUnlock(fileGroupDescHandle);
+ aSTG.hGlobal = fileGroupDescHandle;
+ aSTG.tymed = TYMED_HGLOBAL;
+
+ return S_OK;
+} // GetFileDescriptorInternetShortcutA
+
+HRESULT
+nsDataObj ::GetFileDescriptorInternetShortcutW(FORMATETC& aFE,
+ STGMEDIUM& aSTG) {
+ // get the title of the shortcut
+ nsAutoString title;
+ if (NS_FAILED(ExtractShortcutTitle(title))) return E_OUTOFMEMORY;
+
+ HGLOBAL fileGroupDescHandle =
+ ::GlobalAlloc(GMEM_ZEROINIT | GMEM_SHARE, sizeof(FILEGROUPDESCRIPTORW));
+ if (!fileGroupDescHandle) return E_OUTOFMEMORY;
+
+ LPFILEGROUPDESCRIPTORW fileGroupDescW =
+ reinterpret_cast<LPFILEGROUPDESCRIPTORW>(
+ ::GlobalLock(fileGroupDescHandle));
+ if (!fileGroupDescW) {
+ ::GlobalFree(fileGroupDescHandle);
+ return E_OUTOFMEMORY;
+ }
+
+ // get a valid filename in the following order: 1) from the page title,
+ // 2) localized string for an untitled page, 3) just use "Untitled.url"
+ if (!CreateURLFilenameFromTextW(title, fileGroupDescW->fgd[0].cFileName)) {
+ nsAutoString untitled;
+ if (!GetLocalizedString("noPageTitle", untitled) ||
+ !CreateURLFilenameFromTextW(untitled,
+ fileGroupDescW->fgd[0].cFileName)) {
+ wcscpy(fileGroupDescW->fgd[0].cFileName, L"Untitled.url");
+ }
+ }
+
+ // one file in the file block
+ fileGroupDescW->cItems = 1;
+ fileGroupDescW->fgd[0].dwFlags = FD_LINKUI;
+
+ ::GlobalUnlock(fileGroupDescHandle);
+ aSTG.hGlobal = fileGroupDescHandle;
+ aSTG.tymed = TYMED_HGLOBAL;
+
+ return S_OK;
+} // GetFileDescriptorInternetShortcutW
+
+//
+// GetFileContentsInternetShortcut
+//
+// Create the special format for an internet shortcut and build up the data
+// structures the shell is expecting.
+//
+HRESULT
+nsDataObj ::GetFileContentsInternetShortcut(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ static const char* kShellIconPref = "browser.shell.shortcutFavicons";
+ nsAutoString url;
+ if (NS_FAILED(ExtractShortcutURL(url))) return E_OUTOFMEMORY;
+
+ nsCOMPtr<nsIURI> aUri;
+ nsresult rv = NS_NewURI(getter_AddRefs(aUri), url);
+ if (NS_FAILED(rv)) {
+ return E_FAIL;
+ }
+
+ nsAutoCString asciiUrl;
+ rv = aUri->GetAsciiSpec(asciiUrl);
+ if (NS_FAILED(rv)) {
+ return E_FAIL;
+ }
+
+ RefPtr<AutoCloseEvent> event;
+
+ const char* shortcutFormatStr;
+ int totalLen;
+ nsCString asciiPath;
+ if (!Preferences::GetBool(kShellIconPref, true)) {
+ shortcutFormatStr = "[InternetShortcut]\r\nURL=%s\r\n";
+ const int formatLen = strlen(shortcutFormatStr) - 2; // don't include %s
+ totalLen = formatLen + asciiUrl.Length(); // don't include null character
+ } else {
+ nsCOMPtr<nsIFile> icoFile;
+
+ nsAutoString aUriHash;
+
+ event = new AutoCloseEvent();
+ if (!event->IsInited()) {
+ return E_FAIL;
+ }
+
+ RefPtr<AutoSetEvent> e = new AutoSetEvent(WrapNotNull(event));
+ mozilla::widget::FaviconHelper::ObtainCachedIconFile(
+ aUri, aUriHash, mIOThread, true,
+ NS_NewRunnableFunction(
+ "FaviconHelper::RefreshDesktop", [e = std::move(e)] {
+ if (e->IsWaiting()) {
+ // Unblock IStream:::Read.
+ e->Signal();
+ } else {
+ // We could not wait until the favicon was available. We have
+ // to refresh to refect the favicon.
+ SendNotifyMessage(HWND_BROADCAST, WM_SETTINGCHANGE,
+ SPI_SETNONCLIENTMETRICS, 0);
+ }
+ }));
+
+ rv = mozilla::widget::FaviconHelper::GetOutputIconPath(aUri, icoFile, true);
+ NS_ENSURE_SUCCESS(rv, E_FAIL);
+ nsString path;
+ rv = icoFile->GetPath(path);
+ NS_ENSURE_SUCCESS(rv, E_FAIL);
+
+ if (IsAsciiNullTerminated(static_cast<const char16_t*>(path.get()))) {
+ LossyCopyUTF16toASCII(path, asciiPath);
+ shortcutFormatStr =
+ "[InternetShortcut]\r\nURL=%s\r\n"
+ "IDList=\r\nHotKey=0\r\nIconFile=%s\r\n"
+ "IconIndex=0\r\n";
+ } else {
+ int len =
+ WideCharToMultiByte(CP_UTF7, 0, char16ptr_t(path.BeginReading()),
+ path.Length(), nullptr, 0, nullptr, nullptr);
+ NS_ENSURE_TRUE(len > 0, E_FAIL);
+ asciiPath.SetLength(len);
+ WideCharToMultiByte(CP_UTF7, 0, char16ptr_t(path.BeginReading()),
+ path.Length(), asciiPath.BeginWriting(), len, nullptr,
+ nullptr);
+ shortcutFormatStr =
+ "[InternetShortcut]\r\nURL=%s\r\n"
+ "IDList=\r\nHotKey=0\r\nIconIndex=0\r\n"
+ "[InternetShortcut.W]\r\nIconFile=%s\r\n";
+ }
+ const int formatLen = strlen(shortcutFormatStr) - 2 * 2; // no %s twice
+ totalLen = formatLen + asciiUrl.Length() +
+ asciiPath.Length(); // we don't want a null character on the end
+ }
+
+ // create a global memory area and build up the file contents w/in it
+ nsAutoGlobalMem globalMem(nsHGLOBAL(::GlobalAlloc(GMEM_SHARE, totalLen)));
+ if (!globalMem) return E_OUTOFMEMORY;
+
+ char* contents = reinterpret_cast<char*>(::GlobalLock(globalMem.get()));
+ if (!contents) {
+ return E_OUTOFMEMORY;
+ }
+
+ // NOTE: we intentionally use the Microsoft version of snprintf here because
+ // it does NOT null
+ // terminate strings which reach the maximum size of the buffer. Since we know
+ // that the formatted length here is totalLen, this call to _snprintf will
+ // format the string into the buffer without appending the null character.
+
+ if (!Preferences::GetBool(kShellIconPref, true)) {
+ _snprintf(contents, totalLen, shortcutFormatStr, asciiUrl.get());
+ } else {
+ _snprintf(contents, totalLen, shortcutFormatStr, asciiUrl.get(),
+ asciiPath.get());
+ }
+
+ ::GlobalUnlock(globalMem.get());
+
+ if (aFE.tymed & TYMED_ISTREAM) {
+ if (!mIsInOperation) {
+ // The drop target didn't initiate an async operation.
+ // We can't block CMemStream::Read.
+ event = nullptr;
+ }
+ RefPtr<IStream> stream =
+ new CMemStream(globalMem.disown(), totalLen, event.forget());
+ stream.forget(&aSTG.pstm);
+ aSTG.tymed = TYMED_ISTREAM;
+ } else {
+ if (event && event->IsInited()) {
+ event->Signal(); // We can't block reading the global memory
+ }
+ aSTG.hGlobal = globalMem.disown();
+ aSTG.tymed = TYMED_HGLOBAL;
+ }
+
+ return S_OK;
+} // GetFileContentsInternetShortcut
+
+// check if specified flavour is present in the transferable
+bool nsDataObj ::IsFlavourPresent(const char* inFlavour) {
+ bool retval = false;
+ NS_ENSURE_TRUE(mTransferable, false);
+
+ // get the list of flavors available in the transferable
+ nsTArray<nsCString> flavors;
+ nsresult rv = mTransferable->FlavorsTransferableCanExport(flavors);
+ NS_ENSURE_SUCCESS(rv, false);
+
+ // try to find requested flavour
+ for (uint32_t i = 0; i < flavors.Length(); ++i) {
+ if (flavors[i].Equals(inFlavour)) {
+ retval = true; // found it!
+ break;
+ }
+ } // for each flavor
+
+ return retval;
+}
+
+HRESULT nsDataObj::GetPreferredDropEffect(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ HRESULT res = S_OK;
+ aSTG.tymed = TYMED_HGLOBAL;
+ aSTG.pUnkForRelease = nullptr;
+ HGLOBAL hGlobalMemory = nullptr;
+ hGlobalMemory = ::GlobalAlloc(GMEM_MOVEABLE, sizeof(DWORD));
+ if (hGlobalMemory) {
+ DWORD* pdw = (DWORD*)GlobalLock(hGlobalMemory);
+ // The PreferredDropEffect clipboard format is only registered if a
+ // drag/drop of an image happens from Mozilla to the desktop. We want its
+ // value to be DROPEFFECT_MOVE in that case so that the file is moved from
+ // the temporary location, not copied. This value should, ideally, be set on
+ // the data object via SetData() but our IDataObject implementation doesn't
+ // implement SetData. It adds data to the data object lazily only when the
+ // drop target asks for it.
+ *pdw = (DWORD)DROPEFFECT_MOVE;
+ GlobalUnlock(hGlobalMemory);
+ } else {
+ res = E_OUTOFMEMORY;
+ }
+ aSTG.hGlobal = hGlobalMemory;
+ return res;
+}
+
+//-----------------------------------------------------
+HRESULT nsDataObj::GetText(const nsACString& aDataFlavor, FORMATETC& aFE,
+ STGMEDIUM& aSTG) {
+ void* data = nullptr;
+
+ const nsPromiseFlatCString& flavorStr = PromiseFlatCString(aDataFlavor);
+
+ // NOTE: CreateDataFromPrimitive creates new memory, that needs to be deleted
+ nsCOMPtr<nsISupports> genericDataWrapper;
+ nsresult rv = mTransferable->GetTransferData(
+ flavorStr.get(), getter_AddRefs(genericDataWrapper));
+ if (NS_FAILED(rv) || !genericDataWrapper) {
+ return E_FAIL;
+ }
+
+ uint32_t len;
+ nsPrimitiveHelpers::CreateDataFromPrimitive(
+ nsDependentCString(flavorStr.get()), genericDataWrapper, &data, &len);
+ if (!data) return E_FAIL;
+
+ HGLOBAL hGlobalMemory = nullptr;
+
+ aSTG.tymed = TYMED_HGLOBAL;
+ aSTG.pUnkForRelease = nullptr;
+
+ // We play games under the hood and advertise flavors that we know we
+ // can support, only they require a bit of conversion or munging of the data.
+ // Do that here.
+ //
+ // The transferable gives us data that is null-terminated, but this isn't
+ // reflected in the |len| parameter. Windoze apps expect this null to be there
+ // so bump our data buffer by the appropriate size to account for the null
+ // (one char for CF_TEXT, one char16_t for CF_UNICODETEXT).
+ DWORD allocLen = (DWORD)len;
+ if (aFE.cfFormat == CF_TEXT) {
+ // Someone is asking for text/plain; convert the unicode (assuming it's
+ // present) to text with the correct platform encoding.
+ size_t bufferSize = sizeof(char) * (len + 2);
+ char* plainTextData = static_cast<char*>(moz_xmalloc(bufferSize));
+ char16_t* castedUnicode = reinterpret_cast<char16_t*>(data);
+ int32_t plainTextLen =
+ WideCharToMultiByte(CP_ACP, 0, (LPCWSTR)castedUnicode, len / 2 + 1,
+ plainTextData, bufferSize, NULL, NULL);
+ // replace the unicode data with our plaintext data. Recall that
+ // |plainTextLen| doesn't include the null in the length.
+ free(data);
+ if (plainTextLen) {
+ data = plainTextData;
+ allocLen = plainTextLen;
+ } else {
+ free(plainTextData);
+ NS_WARNING("Oh no, couldn't convert unicode to plain text");
+ return S_OK;
+ }
+ } else if (aFE.cfFormat == nsClipboard::GetHtmlClipboardFormat()) {
+ // Someone is asking for win32's HTML flavor. Convert our html fragment
+ // from unicode to UTF-8 then put it into a format specified by msft.
+ NS_ConvertUTF16toUTF8 converter(reinterpret_cast<char16_t*>(data));
+ char* utf8HTML = nullptr;
+ nsresult rv =
+ BuildPlatformHTML(converter.get(), &utf8HTML); // null terminates
+
+ free(data);
+ if (NS_SUCCEEDED(rv) && utf8HTML) {
+ // replace the unicode data with our HTML data. Don't forget the null.
+ data = utf8HTML;
+ allocLen = strlen(utf8HTML) + sizeof(char);
+ } else {
+ NS_WARNING("Oh no, couldn't convert to HTML");
+ return S_OK;
+ }
+ } else if (aFE.cfFormat != nsClipboard::GetCustomClipboardFormat()) {
+ // we assume that any data that isn't caught above is unicode. This may
+ // be an erroneous assumption, but is true so far.
+ allocLen += sizeof(char16_t);
+ }
+
+ hGlobalMemory = (HGLOBAL)GlobalAlloc(GMEM_MOVEABLE, allocLen);
+
+ // Copy text to Global Memory Area
+ if (hGlobalMemory) {
+ char* dest = reinterpret_cast<char*>(GlobalLock(hGlobalMemory));
+ char* source = reinterpret_cast<char*>(data);
+ memcpy(dest, source, allocLen); // copies the null as well
+ GlobalUnlock(hGlobalMemory);
+ }
+ aSTG.hGlobal = hGlobalMemory;
+
+ // Now, delete the memory that was created by CreateDataFromPrimitive (or our
+ // text/plain data)
+ free(data);
+
+ return S_OK;
+}
+
+//-----------------------------------------------------
+HRESULT nsDataObj::GetFile(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ uint32_t dfInx = 0;
+ ULONG count;
+ FORMATETC fe;
+ m_enumFE->Reset();
+ while (NOERROR == m_enumFE->Next(1, &fe, &count) &&
+ dfInx < mDataFlavors.Length()) {
+ if (mDataFlavors[dfInx].EqualsLiteral(kNativeImageMime))
+ return DropImage(aFE, aSTG);
+ if (mDataFlavors[dfInx].EqualsLiteral(kFileMime))
+ return DropFile(aFE, aSTG);
+ if (mDataFlavors[dfInx].EqualsLiteral(kFilePromiseMime))
+ return DropTempFile(aFE, aSTG);
+ dfInx++;
+ }
+ return E_FAIL;
+}
+
+HRESULT nsDataObj::DropFile(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ nsresult rv;
+ nsCOMPtr<nsISupports> genericDataWrapper;
+
+ if (NS_FAILED(mTransferable->GetTransferData(
+ kFileMime, getter_AddRefs(genericDataWrapper)))) {
+ return E_FAIL;
+ }
+ nsCOMPtr<nsIFile> file(do_QueryInterface(genericDataWrapper));
+ if (!file) return E_FAIL;
+
+ aSTG.tymed = TYMED_HGLOBAL;
+ aSTG.pUnkForRelease = nullptr;
+
+ nsAutoString path;
+ rv = file->GetPath(path);
+ if (NS_FAILED(rv)) return E_FAIL;
+
+ uint32_t allocLen = path.Length() + 2;
+ HGLOBAL hGlobalMemory = nullptr;
+ char16_t* dest;
+
+ hGlobalMemory = GlobalAlloc(GMEM_MOVEABLE,
+ sizeof(DROPFILES) + allocLen * sizeof(char16_t));
+ if (!hGlobalMemory) return E_FAIL;
+
+ DROPFILES* pDropFile = (DROPFILES*)GlobalLock(hGlobalMemory);
+
+ // First, populate the drop file structure
+ pDropFile->pFiles = sizeof(DROPFILES); // Offset to start of file name string
+ pDropFile->fNC = 0;
+ pDropFile->pt.x = 0;
+ pDropFile->pt.y = 0;
+ pDropFile->fWide = TRUE;
+
+ // Copy the filename right after the DROPFILES structure
+ dest = (char16_t*)(((char*)pDropFile) + pDropFile->pFiles);
+ memcpy(dest, path.get(), (allocLen - 1) * sizeof(char16_t));
+
+ // Two null characters are needed at the end of the file name.
+ // Lookup the CF_HDROP shell clipboard format for more info.
+ // Add the second null character right after the first one.
+ dest[allocLen - 1] = L'\0';
+
+ GlobalUnlock(hGlobalMemory);
+
+ aSTG.hGlobal = hGlobalMemory;
+
+ return S_OK;
+}
+
+HRESULT nsDataObj::DropImage(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ nsresult rv;
+ if (!mCachedTempFile) {
+ nsCOMPtr<nsISupports> genericDataWrapper;
+
+ if (NS_FAILED(mTransferable->GetTransferData(
+ kNativeImageMime, getter_AddRefs(genericDataWrapper)))) {
+ return E_FAIL;
+ }
+ nsCOMPtr<imgIContainer> image(do_QueryInterface(genericDataWrapper));
+ if (!image) return E_FAIL;
+
+ nsCOMPtr<imgITools> imgTools =
+ do_CreateInstance("@mozilla.org/image/tools;1");
+ nsCOMPtr<nsIInputStream> inputStream;
+ rv = imgTools->EncodeImage(image, nsLiteralCString(IMAGE_BMP),
+ u"bpp=32;version=3"_ns,
+ getter_AddRefs(inputStream));
+ if (NS_FAILED(rv) || !inputStream) {
+ return E_FAIL;
+ }
+
+ nsCOMPtr<imgIEncoder> encoder = do_QueryInterface(inputStream);
+ if (!encoder) {
+ return E_FAIL;
+ }
+
+ uint32_t size = 0;
+ rv = encoder->GetImageBufferUsed(&size);
+ if (NS_FAILED(rv)) {
+ return E_FAIL;
+ }
+
+ char* src = nullptr;
+ rv = encoder->GetImageBuffer(&src);
+ if (NS_FAILED(rv) || !src) {
+ return E_FAIL;
+ }
+
+ // Save the bitmap to a temporary location.
+ nsCOMPtr<nsIFile> dropFile;
+ rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(dropFile));
+ if (!dropFile) {
+ return E_FAIL;
+ }
+
+ // Filename must be random so as not to confuse apps like
+ // Photoshop which handle multiple drags into a single window.
+ char buf[13];
+ nsCString filename;
+ NS_MakeRandomString(buf, 8);
+ memcpy(buf + 8, ".bmp", 5);
+ filename.Append(nsDependentCString(buf, 12));
+ dropFile->AppendNative(filename);
+ rv = dropFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0660);
+ if (NS_FAILED(rv)) {
+ return E_FAIL;
+ }
+
+ // Cache the temp file so we can delete it later and so
+ // it doesn't get recreated over and over on multiple calls
+ // which does occur from windows shell.
+ dropFile->Clone(getter_AddRefs(mCachedTempFile));
+
+ // Write the data to disk.
+ nsCOMPtr<nsIOutputStream> outStream;
+ rv = NS_NewLocalFileOutputStream(getter_AddRefs(outStream), dropFile);
+ if (NS_FAILED(rv)) {
+ return E_FAIL;
+ }
+
+ uint32_t written = 0;
+ rv = outStream->Write(src, size, &written);
+ if (NS_FAILED(rv) || written != size) {
+ return E_FAIL;
+ }
+
+ outStream->Close();
+ }
+
+ // Pass the file name back to the drop target so that it can access the file.
+ nsAutoString path;
+ rv = mCachedTempFile->GetPath(path);
+ if (NS_FAILED(rv)) return E_FAIL;
+
+ // Two null characters are needed to terminate the file name list.
+ HGLOBAL hGlobalMemory = nullptr;
+
+ uint32_t allocLen = path.Length() + 2;
+
+ aSTG.tymed = TYMED_HGLOBAL;
+ aSTG.pUnkForRelease = nullptr;
+
+ hGlobalMemory = GlobalAlloc(GMEM_MOVEABLE,
+ sizeof(DROPFILES) + allocLen * sizeof(char16_t));
+ if (!hGlobalMemory) return E_FAIL;
+
+ DROPFILES* pDropFile = (DROPFILES*)GlobalLock(hGlobalMemory);
+
+ // First, populate the drop file structure.
+ pDropFile->pFiles =
+ sizeof(DROPFILES); // Offset to start of file name char array.
+ pDropFile->fNC = 0;
+ pDropFile->pt.x = 0;
+ pDropFile->pt.y = 0;
+ pDropFile->fWide = TRUE;
+
+ // Copy the filename right after the DROPFILES structure.
+ char16_t* dest = (char16_t*)(((char*)pDropFile) + pDropFile->pFiles);
+ memcpy(dest, path.get(),
+ (allocLen - 1) *
+ sizeof(char16_t)); // Copies the null character in path as well.
+
+ // Two null characters are needed at the end of the file name.
+ // Lookup the CF_HDROP shell clipboard format for more info.
+ // Add the second null character right after the first one.
+ dest[allocLen - 1] = L'\0';
+
+ GlobalUnlock(hGlobalMemory);
+
+ aSTG.hGlobal = hGlobalMemory;
+
+ return S_OK;
+}
+
+HRESULT nsDataObj::DropTempFile(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ nsresult rv;
+ if (!mCachedTempFile) {
+ // Tempfile will need a temporary location.
+ nsCOMPtr<nsIFile> dropFile;
+ rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(dropFile));
+ if (!dropFile) return E_FAIL;
+
+ // Filename must be random
+ nsCString filename;
+ nsAutoString wideFileName;
+ nsCOMPtr<nsIURI> sourceURI;
+ HRESULT res;
+ res = GetDownloadDetails(getter_AddRefs(sourceURI), wideFileName);
+ if (FAILED(res)) return res;
+ NS_CopyUnicodeToNative(wideFileName, filename);
+
+ dropFile->AppendNative(filename);
+ rv = dropFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0660);
+ if (NS_FAILED(rv)) return E_FAIL;
+
+ // Cache the temp file so we can delete it later and so
+ // it doesn't get recreated over and over on multiple calls
+ // which does occur from windows shell.
+ dropFile->Clone(getter_AddRefs(mCachedTempFile));
+
+ // Write the data to disk.
+ nsCOMPtr<nsIOutputStream> outStream;
+ rv = NS_NewLocalFileOutputStream(getter_AddRefs(outStream), dropFile);
+ if (NS_FAILED(rv)) return E_FAIL;
+
+ IStream* pStream = nullptr;
+ nsDataObj::CreateStream(&pStream);
+ NS_ENSURE_TRUE(pStream, E_FAIL);
+
+ char buffer[512];
+ ULONG readCount = 0;
+ uint32_t writeCount = 0;
+ while (1) {
+ HRESULT hres = pStream->Read(buffer, sizeof(buffer), &readCount);
+ if (FAILED(hres)) return E_FAIL;
+ if (readCount == 0) break;
+ rv = outStream->Write(buffer, readCount, &writeCount);
+ if (NS_FAILED(rv)) return E_FAIL;
+ }
+ outStream->Close();
+ pStream->Release();
+ }
+
+ // Pass the file name back to the drop target so that it can access the file.
+ nsAutoString path;
+ rv = mCachedTempFile->GetPath(path);
+ if (NS_FAILED(rv)) return E_FAIL;
+
+ uint32_t allocLen = path.Length() + 2;
+
+ // Two null characters are needed to terminate the file name list.
+ HGLOBAL hGlobalMemory = nullptr;
+
+ aSTG.tymed = TYMED_HGLOBAL;
+ aSTG.pUnkForRelease = nullptr;
+
+ hGlobalMemory = GlobalAlloc(GMEM_MOVEABLE,
+ sizeof(DROPFILES) + allocLen * sizeof(char16_t));
+ if (!hGlobalMemory) return E_FAIL;
+
+ DROPFILES* pDropFile = (DROPFILES*)GlobalLock(hGlobalMemory);
+
+ // First, populate the drop file structure.
+ pDropFile->pFiles =
+ sizeof(DROPFILES); // Offset to start of file name char array.
+ pDropFile->fNC = 0;
+ pDropFile->pt.x = 0;
+ pDropFile->pt.y = 0;
+ pDropFile->fWide = TRUE;
+
+ // Copy the filename right after the DROPFILES structure.
+ char16_t* dest = (char16_t*)(((char*)pDropFile) + pDropFile->pFiles);
+ memcpy(dest, path.get(),
+ (allocLen - 1) *
+ sizeof(char16_t)); // Copies the null character in path as well.
+
+ // Two null characters are needed at the end of the file name.
+ // Lookup the CF_HDROP shell clipboard format for more info.
+ // Add the second null character right after the first one.
+ dest[allocLen - 1] = L'\0';
+
+ GlobalUnlock(hGlobalMemory);
+
+ aSTG.hGlobal = hGlobalMemory;
+
+ return S_OK;
+}
+
+//-----------------------------------------------------
+// Registers the DataFlavor/FE pair.
+//-----------------------------------------------------
+void nsDataObj::AddDataFlavor(const char* aDataFlavor, LPFORMATETC aFE) {
+ // These two lists are the mapping to and from data flavors and FEs.
+ // Later, OLE will tell us it needs a certain type of FORMATETC (text,
+ // unicode, etc) unicode, etc), so we will look up the data flavor that
+ // corresponds to the FE and then ask the transferable for that type of data.
+ mDataFlavors.AppendElement(aDataFlavor);
+ m_enumFE->AddFormatEtc(aFE);
+}
+
+//-----------------------------------------------------
+// Sets the transferable object
+//-----------------------------------------------------
+void nsDataObj::SetTransferable(nsITransferable* aTransferable) {
+ NS_IF_RELEASE(mTransferable);
+
+ mTransferable = aTransferable;
+ if (nullptr == mTransferable) {
+ return;
+ }
+
+ NS_ADDREF(mTransferable);
+
+ return;
+}
+
+//
+// ExtractURL
+//
+// Roots around in the transferable for the appropriate flavor that indicates
+// a url and pulls out the url portion of the data. Used mostly for creating
+// internet shortcuts on the desktop. The url flavor is of the format:
+//
+// <url> <linefeed> <page title>
+//
+nsresult nsDataObj ::ExtractShortcutURL(nsString& outURL) {
+ NS_ASSERTION(mTransferable, "We don't have a good transferable");
+ nsresult rv = NS_ERROR_FAILURE;
+
+ nsCOMPtr<nsISupports> genericURL;
+ if (NS_SUCCEEDED(mTransferable->GetTransferData(
+ kURLMime, getter_AddRefs(genericURL)))) {
+ nsCOMPtr<nsISupportsString> urlObject(do_QueryInterface(genericURL));
+ if (urlObject) {
+ nsAutoString url;
+ urlObject->GetData(url);
+ outURL = url;
+
+ // find the first linefeed in the data, that's where the url ends. trunc
+ // the result string at that point.
+ int32_t lineIndex = outURL.FindChar('\n');
+ NS_ASSERTION(lineIndex > 0,
+ "Format for url flavor is <url> <linefeed> <page title>");
+ if (lineIndex > 0) {
+ outURL.Truncate(lineIndex);
+ rv = NS_OK;
+ }
+ }
+ } else if (NS_SUCCEEDED(mTransferable->GetTransferData(
+ kURLDataMime, getter_AddRefs(genericURL))) ||
+ NS_SUCCEEDED(mTransferable->GetTransferData(
+ kURLPrivateMime, getter_AddRefs(genericURL)))) {
+ nsCOMPtr<nsISupportsString> urlObject(do_QueryInterface(genericURL));
+ if (urlObject) {
+ nsAutoString url;
+ urlObject->GetData(url);
+ outURL = url;
+
+ rv = NS_OK;
+ }
+
+ } // if found flavor
+
+ return rv;
+
+} // ExtractShortcutURL
+
+//
+// ExtractShortcutTitle
+//
+// Roots around in the transferable for the appropriate flavor that indicates
+// a url and pulls out the title portion of the data. Used mostly for creating
+// internet shortcuts on the desktop. The url flavor is of the format:
+//
+// <url> <linefeed> <page title>
+//
+nsresult nsDataObj ::ExtractShortcutTitle(nsString& outTitle) {
+ NS_ASSERTION(mTransferable, "We'd don't have a good transferable");
+ nsresult rv = NS_ERROR_FAILURE;
+
+ nsCOMPtr<nsISupports> genericURL;
+ if (NS_SUCCEEDED(mTransferable->GetTransferData(
+ kURLMime, getter_AddRefs(genericURL)))) {
+ nsCOMPtr<nsISupportsString> urlObject(do_QueryInterface(genericURL));
+ if (urlObject) {
+ nsAutoString url;
+ urlObject->GetData(url);
+
+ // find the first linefeed in the data, that's where the url ends. we want
+ // everything after that linefeed. FindChar() returns -1 if we can't find
+ int32_t lineIndex = url.FindChar('\n');
+ NS_ASSERTION(lineIndex != -1,
+ "Format for url flavor is <url> <linefeed> <page title>");
+ if (lineIndex != -1) {
+ url.Mid(outTitle, lineIndex + 1, url.Length() - (lineIndex + 1));
+ rv = NS_OK;
+ }
+ }
+ } // if found flavor
+
+ return rv;
+
+} // ExtractShortcutTitle
+
+//
+// BuildPlatformHTML
+//
+// Munge our HTML data to win32's CF_HTML spec. Basically, put the requisite
+// header information on it. This will null-terminate |outPlatformHTML|. See
+// https://docs.microsoft.com/en-us/windows/win32/dataxchg/html-clipboard-format
+// for details.
+//
+// We assume that |inOurHTML| is already a fragment (ie, doesn't have <HTML>
+// or <BODY> tags). We'll wrap the fragment with them to make other apps
+// happy.
+//
+nsresult nsDataObj ::BuildPlatformHTML(const char* inOurHTML,
+ char** outPlatformHTML) {
+ *outPlatformHTML = nullptr;
+ nsDependentCString inHTMLString(inOurHTML);
+
+ // Do we already have mSourceURL from a drag?
+ if (mSourceURL.IsEmpty()) {
+ nsAutoString url;
+ ExtractShortcutURL(url);
+
+ AppendUTF16toUTF8(url, mSourceURL);
+ }
+
+ constexpr auto kStartHTMLPrefix = "Version:0.9\r\nStartHTML:"_ns;
+ constexpr auto kEndHTMLPrefix = "\r\nEndHTML:"_ns;
+ constexpr auto kStartFragPrefix = "\r\nStartFragment:"_ns;
+ constexpr auto kEndFragPrefix = "\r\nEndFragment:"_ns;
+ constexpr auto kStartSourceURLPrefix = "\r\nSourceURL:"_ns;
+ constexpr auto kEndFragTrailer = "\r\n"_ns;
+
+ // The CF_HTML's size is embedded in the fragment, in such a way that the
+ // number of digits in the size is part of the size itself. While it _is_
+ // technically possible to compute the necessary size of the size-field
+ // precisely -- by trial and error, if nothing else -- it's simpler just to
+ // pick a rough but generous estimate and zero-pad it. (Zero-padding is
+ // explicitly permitted by the format definition.)
+ //
+ // Originally, in 2001, the "rough but generous estimate" was 8 digits. While
+ // a maximum size of (10**9 - 1) bytes probably would have covered all
+ // possible use-cases at the time, it's somewhat more likely to overflow
+ // nowadays. Nonetheless, for the sake of backwards compatibility with any
+ // misbehaving consumers of our existing CF_HTML output, we retain exactly
+ // that padding for (most) fragments where it suffices. (No such misbehaving
+ // consumers are actually known, so this is arguably paranoia.)
+ //
+ // It is now 2022. A padding size of 16 will cover up to about 8.8 petabytes,
+ // which should be enough for at least the next few years or so.
+ const size_t numberLength = inHTMLString.Length() < 9999'0000 ? 8 : 16;
+
+ const size_t sourceURLLength = mSourceURL.Length();
+
+ const size_t fixedHeaderLen =
+ kStartHTMLPrefix.Length() + kEndHTMLPrefix.Length() +
+ kStartFragPrefix.Length() + kEndFragPrefix.Length() +
+ kEndFragTrailer.Length() + (4 * numberLength);
+
+ const size_t totalHeaderLen =
+ fixedHeaderLen + (sourceURLLength > 0
+ ? kStartSourceURLPrefix.Length() + sourceURLLength
+ : 0);
+
+ constexpr auto kHeaderString = "<html><body>\r\n<!--StartFragment-->"_ns;
+ constexpr auto kTrailingString =
+ "<!--EndFragment-->\r\n"
+ "</body>\r\n"
+ "</html>"_ns;
+
+ // calculate the offsets
+ size_t startHTMLOffset = totalHeaderLen;
+ size_t startFragOffset = startHTMLOffset + kHeaderString.Length();
+
+ size_t endFragOffset = startFragOffset + inHTMLString.Length();
+ size_t endHTMLOffset = endFragOffset + kTrailingString.Length();
+
+ // now build the final version
+ nsCString clipboardString;
+ clipboardString.SetCapacity(endHTMLOffset);
+
+ const int numberLengthInt = static_cast<int>(numberLength);
+ clipboardString.Append(kStartHTMLPrefix);
+ clipboardString.AppendPrintf("%0*zu", numberLengthInt, startHTMLOffset);
+
+ clipboardString.Append(kEndHTMLPrefix);
+ clipboardString.AppendPrintf("%0*zu", numberLengthInt, endHTMLOffset);
+
+ clipboardString.Append(kStartFragPrefix);
+ clipboardString.AppendPrintf("%0*zu", numberLengthInt, startFragOffset);
+
+ clipboardString.Append(kEndFragPrefix);
+ clipboardString.AppendPrintf("%0*zu", numberLengthInt, endFragOffset);
+
+ if (sourceURLLength > 0) {
+ clipboardString.Append(kStartSourceURLPrefix);
+ clipboardString.Append(mSourceURL);
+ }
+
+ clipboardString.Append(kEndFragTrailer);
+
+ // Assert that the positional values were correct as we pass by their
+ // corresponding positions.
+ MOZ_ASSERT(clipboardString.Length() == startHTMLOffset);
+ clipboardString.Append(kHeaderString);
+ MOZ_ASSERT(clipboardString.Length() == startFragOffset);
+ clipboardString.Append(inHTMLString);
+ MOZ_ASSERT(clipboardString.Length() == endFragOffset);
+ clipboardString.Append(kTrailingString);
+ MOZ_ASSERT(clipboardString.Length() == endHTMLOffset);
+
+ *outPlatformHTML = ToNewCString(clipboardString, mozilla::fallible);
+ if (!*outPlatformHTML) return NS_ERROR_OUT_OF_MEMORY;
+
+ return NS_OK;
+}
+
+HRESULT
+nsDataObj ::GetUniformResourceLocator(FORMATETC& aFE, STGMEDIUM& aSTG,
+ bool aIsUnicode) {
+ HRESULT res = S_OK;
+ if (IsFlavourPresent(kURLMime)) {
+ if (aIsUnicode)
+ res = ExtractUniformResourceLocatorW(aFE, aSTG);
+ else
+ res = ExtractUniformResourceLocatorA(aFE, aSTG);
+ } else
+ NS_WARNING("Not yet implemented\n");
+ return res;
+}
+
+HRESULT
+nsDataObj::ExtractUniformResourceLocatorA(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ HRESULT result = S_OK;
+
+ nsAutoString url;
+ if (NS_FAILED(ExtractShortcutURL(url))) return E_OUTOFMEMORY;
+
+ NS_LossyConvertUTF16toASCII asciiUrl(url);
+ const int totalLen = asciiUrl.Length() + 1;
+ HGLOBAL hGlobalMemory = GlobalAlloc(GMEM_ZEROINIT | GMEM_SHARE, totalLen);
+ if (!hGlobalMemory) return E_OUTOFMEMORY;
+
+ char* contents = reinterpret_cast<char*>(GlobalLock(hGlobalMemory));
+ if (!contents) {
+ GlobalFree(hGlobalMemory);
+ return E_OUTOFMEMORY;
+ }
+
+ strcpy(contents, asciiUrl.get());
+ GlobalUnlock(hGlobalMemory);
+ aSTG.hGlobal = hGlobalMemory;
+ aSTG.tymed = TYMED_HGLOBAL;
+
+ return result;
+}
+
+HRESULT
+nsDataObj::ExtractUniformResourceLocatorW(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ HRESULT result = S_OK;
+
+ nsAutoString url;
+ if (NS_FAILED(ExtractShortcutURL(url))) return E_OUTOFMEMORY;
+
+ const int totalLen = (url.Length() + 1) * sizeof(char16_t);
+ HGLOBAL hGlobalMemory = GlobalAlloc(GMEM_ZEROINIT | GMEM_SHARE, totalLen);
+ if (!hGlobalMemory) return E_OUTOFMEMORY;
+
+ wchar_t* contents = reinterpret_cast<wchar_t*>(GlobalLock(hGlobalMemory));
+ if (!contents) {
+ GlobalFree(hGlobalMemory);
+ return E_OUTOFMEMORY;
+ }
+
+ wcscpy(contents, url.get());
+ GlobalUnlock(hGlobalMemory);
+ aSTG.hGlobal = hGlobalMemory;
+ aSTG.tymed = TYMED_HGLOBAL;
+
+ return result;
+}
+
+// Gets the filename from the kFilePromiseURLMime flavour
+HRESULT nsDataObj::GetDownloadDetails(nsIURI** aSourceURI,
+ nsAString& aFilename) {
+ *aSourceURI = nullptr;
+
+ NS_ENSURE_TRUE(mTransferable, E_FAIL);
+
+ // get the URI from the kFilePromiseURLMime flavor
+ nsCOMPtr<nsISupports> urlPrimitive;
+ nsresult rv = mTransferable->GetTransferData(kFilePromiseURLMime,
+ getter_AddRefs(urlPrimitive));
+ NS_ENSURE_SUCCESS(rv, E_FAIL);
+ nsCOMPtr<nsISupportsString> srcUrlPrimitive = do_QueryInterface(urlPrimitive);
+ NS_ENSURE_TRUE(srcUrlPrimitive, E_FAIL);
+
+ nsAutoString srcUri;
+ srcUrlPrimitive->GetData(srcUri);
+ if (srcUri.IsEmpty()) return E_FAIL;
+ nsCOMPtr<nsIURI> sourceURI;
+ NS_NewURI(getter_AddRefs(sourceURI), srcUri);
+
+ nsAutoString srcFileName;
+ nsCOMPtr<nsISupports> fileNamePrimitive;
+ Unused << mTransferable->GetTransferData(kFilePromiseDestFilename,
+ getter_AddRefs(fileNamePrimitive));
+ nsCOMPtr<nsISupportsString> srcFileNamePrimitive =
+ do_QueryInterface(fileNamePrimitive);
+ if (srcFileNamePrimitive) {
+ srcFileNamePrimitive->GetData(srcFileName);
+ } else {
+ nsCOMPtr<nsIURL> sourceURL = do_QueryInterface(sourceURI);
+ if (!sourceURL) return E_FAIL;
+
+ nsAutoCString urlFileName;
+ sourceURL->GetFileName(urlFileName);
+ NS_UnescapeURL(urlFileName);
+ CopyUTF8toUTF16(urlFileName, srcFileName);
+ }
+
+ // make the name safe for the filesystem
+ ValidateFilename(srcFileName, false);
+ if (srcFileName.IsEmpty()) return E_FAIL;
+
+ sourceURI.swap(*aSourceURI);
+ aFilename = srcFileName;
+ return S_OK;
+}
+
+HRESULT nsDataObj::GetFileDescriptor_IStreamA(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ HGLOBAL fileGroupDescHandle =
+ ::GlobalAlloc(GMEM_ZEROINIT | GMEM_SHARE, sizeof(FILEGROUPDESCRIPTORW));
+ NS_ENSURE_TRUE(fileGroupDescHandle, E_OUTOFMEMORY);
+
+ LPFILEGROUPDESCRIPTORA fileGroupDescA =
+ reinterpret_cast<LPFILEGROUPDESCRIPTORA>(GlobalLock(fileGroupDescHandle));
+ if (!fileGroupDescA) {
+ ::GlobalFree(fileGroupDescHandle);
+ return E_OUTOFMEMORY;
+ }
+
+ nsAutoString wideFileName;
+ HRESULT res;
+ nsCOMPtr<nsIURI> sourceURI;
+ res = GetDownloadDetails(getter_AddRefs(sourceURI), wideFileName);
+ if (FAILED(res)) {
+ ::GlobalFree(fileGroupDescHandle);
+ return res;
+ }
+
+ nsAutoCString nativeFileName;
+ NS_CopyUnicodeToNative(wideFileName, nativeFileName);
+
+ strncpy(fileGroupDescA->fgd[0].cFileName, nativeFileName.get(), MAX_PATH - 1);
+ fileGroupDescA->fgd[0].cFileName[MAX_PATH - 1] = '\0';
+
+ // one file in the file block
+ fileGroupDescA->cItems = 1;
+ fileGroupDescA->fgd[0].dwFlags = FD_PROGRESSUI;
+
+ GlobalUnlock(fileGroupDescHandle);
+ aSTG.hGlobal = fileGroupDescHandle;
+ aSTG.tymed = TYMED_HGLOBAL;
+
+ return S_OK;
+}
+
+HRESULT nsDataObj::GetFileDescriptor_IStreamW(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ HGLOBAL fileGroupDescHandle =
+ ::GlobalAlloc(GMEM_ZEROINIT | GMEM_SHARE, sizeof(FILEGROUPDESCRIPTORW));
+ NS_ENSURE_TRUE(fileGroupDescHandle, E_OUTOFMEMORY);
+
+ LPFILEGROUPDESCRIPTORW fileGroupDescW =
+ reinterpret_cast<LPFILEGROUPDESCRIPTORW>(GlobalLock(fileGroupDescHandle));
+ if (!fileGroupDescW) {
+ ::GlobalFree(fileGroupDescHandle);
+ return E_OUTOFMEMORY;
+ }
+
+ nsAutoString wideFileName;
+ HRESULT res;
+ nsCOMPtr<nsIURI> sourceURI;
+ res = GetDownloadDetails(getter_AddRefs(sourceURI), wideFileName);
+ if (FAILED(res)) {
+ ::GlobalFree(fileGroupDescHandle);
+ return res;
+ }
+
+ wcsncpy(fileGroupDescW->fgd[0].cFileName, wideFileName.get(), MAX_PATH - 1);
+ fileGroupDescW->fgd[0].cFileName[MAX_PATH - 1] = '\0';
+ // one file in the file block
+ fileGroupDescW->cItems = 1;
+ fileGroupDescW->fgd[0].dwFlags = FD_PROGRESSUI;
+
+ GlobalUnlock(fileGroupDescHandle);
+ aSTG.hGlobal = fileGroupDescHandle;
+ aSTG.tymed = TYMED_HGLOBAL;
+
+ return S_OK;
+}
+
+HRESULT nsDataObj::GetFileContents_IStream(FORMATETC& aFE, STGMEDIUM& aSTG) {
+ IStream* pStream = nullptr;
+
+ nsDataObj::CreateStream(&pStream);
+ NS_ENSURE_TRUE(pStream, E_FAIL);
+
+ aSTG.tymed = TYMED_ISTREAM;
+ aSTG.pstm = pStream;
+ aSTG.pUnkForRelease = nullptr;
+
+ return S_OK;
+}