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nsDataObj.cpp
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/* -*- 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/Util.h"
#include <ole2.h>
#include <shlobj.h>
#include "nsDataObj.h"
#include "nsClipboard.h"
#include "nsReadableUtils.h"
#include "nsITransferable.h"
#include "nsISupportsPrimitives.h"
#include "IEnumFE.h"
#include "nsPrimitiveHelpers.h"
#include "nsXPIDLString.h"
#include "nsImageClipboard.h"
#include "nsCRT.h"
#include "nsPrintfCString.h"
#include "nsIStringBundle.h"
#include "nsEscape.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsXPCOMStrings.h"
#include "nscore.h"
#include "prtypes.h"
#include "nsDirectoryServiceDefs.h"
#include "nsITimer.h"
#include "nsThreadUtils.h"
#include "WinUtils.h"
#include "mozilla/LazyIdleThread.h"
using namespace mozilla;
#define DEFAULT_THREAD_TIMEOUT_MS 30000
NS_IMPL_ISUPPORTS1(nsDataObj::CStream, nsIStreamListener)
//-----------------------------------------------------------------------------
// CStream implementation
nsDataObj::CStream::CStream() :
mChannelRead(false),
mStreamRead(0)
{
}
//-----------------------------------------------------------------------------
nsDataObj::CStream::~CStream()
{
}
//-----------------------------------------------------------------------------
// helper - initializes the stream
nsresult nsDataObj::CStream::Init(nsIURI *pSourceURI)
{
nsresult rv;
rv = NS_NewChannel(getter_AddRefs(mChannel), pSourceURI,
nullptr, nullptr, nullptr,
nsIRequest::LOAD_FROM_CACHE);
NS_ENSURE_SUCCESS(rv, rv);
rv = mChannel->AsyncOpen(this, nullptr);
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 = NULL;
if (IID_IUnknown == refiid ||
refiid == IID_IStream)
{
*ppvResult = this;
}
if (NULL != *ppvResult)
{
((LPUNKNOWN)*ppvResult)->AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
// nsIStreamListener implementation
NS_IMETHODIMP nsDataObj::CStream::OnDataAvailable(nsIRequest *aRequest,
nsISupports *aContext,
nsIInputStream *aInputStream,
PRUint32 aOffset, // offset within the stream
PRUint32 aCount) // bytes available on this call
{
// Extend the write buffer for the incoming data.
PRUint8* buffer = mChannelData.AppendElements(aCount);
if (buffer == NULL)
return NS_ERROR_OUT_OF_MEMORY;
NS_ASSERTION((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.
nsresult rv;
PRUint32 odaBytesReadTotal = 0;
do {
PRUint32 bytesReadByCall = 0;
rv = aInputStream->Read((char*)(buffer + odaBytesReadTotal),
aCount, &bytesReadByCall);
odaBytesReadTotal += bytesReadByCall;
} while (aCount < odaBytesReadTotal && NS_SUCCEEDED(rv));
return rv;
}
NS_IMETHODIMP nsDataObj::CStream::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
mChannelResult = NS_OK;
return NS_OK;
}
NS_IMETHODIMP nsDataObj::CStream::OnStopRequest(nsIRequest *aRequest,
nsISupports *aContext,
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.
while (!mChannelRead) {
// Pump messages
NS_ProcessNextEvent(nullptr, true);
}
if (!mChannelData.Length())
mChannelResult = NS_ERROR_FAILURE;
return mChannelResult;
}
//-----------------------------------------------------------------------------
// IStream
STDMETHODIMP nsDataObj::CStream::Clone(IStream** ppStream)
{
return E_NOTIMPL;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::Commit(DWORD dwFrags)
{
return E_NOTIMPL;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::CopyTo(IStream* pDestStream,
ULARGE_INTEGER nBytesToCopy,
ULARGE_INTEGER* nBytesRead,
ULARGE_INTEGER* nBytesWritten)
{
return E_NOTIMPL;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::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 = NS_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::CStream::Revert(void)
{
return E_NOTIMPL;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::Seek(LARGE_INTEGER nMove,
DWORD dwOrigin,
ULARGE_INTEGER* nNewPos)
{
if (nNewPos == NULL)
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::CStream::SetSize(ULARGE_INTEGER nNewSize)
{
return E_NOTIMPL;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::Stat(STATSTG* statstg, DWORD dwFlags)
{
if (statstg == NULL)
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;
}
nsCAutoString strFileName;
nsCOMPtr<nsIURL> sourceURL = do_QueryInterface(sourceURI);
sourceURL->GetFileName(strFileName);
if (strFileName.IsEmpty())
return E_FAIL;
NS_UnescapeURL(strFileName);
NS_ConvertUTF8toUTF16 wideFileName(strFileName);
PRUint32 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.LowPart = (DWORD)mChannelData.Length();
statstg->grfMode = STGM_READ;
statstg->grfLocksSupported = LOCK_ONLYONCE;
statstg->clsid = CLSID_NULL;
return S_OK;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::UnlockRegion(ULARGE_INTEGER nStart,
ULARGE_INTEGER nBytes,
DWORD dwFlags)
{
return E_NOTIMPL;
}
//-----------------------------------------------------------------------------
STDMETHODIMP nsDataObj::CStream::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;
rv = GetDownloadDetails(getter_AddRefs(sourceURI),
wideFileName);
NS_ENSURE_SUCCESS(rv, rv);
nsDataObj::CStream *pStream = new nsDataObj::CStream();
NS_ENSURE_TRUE(pStream, E_OUTOFMEMORY);
pStream->AddRef();
rv = pStream->Init(sourceURI);
if (NS_FAILED(rv))
{
pStream->Release();
return E_FAIL;
}
*outStream = pStream;
return S_OK;
}
static GUID CLSID_nsDataObj =
{ 0x1bba7640, 0xdf52, 0x11cf, { 0x82, 0x7b, 0, 0xa0, 0x24, 0x3a, 0xe5, 0x05 } };
/*
* deliberately not using MAX_PATH. This is because on platforms < XP
* a file created with a long filename may be mishandled by the shell
* resulting in it not being able to be deleted or moved.
* See bug 250392 for more details.
*/
#define NS_MAX_FILEDESCRIPTOR 128 + 1
/*
* Class nsDataObj
*/
//-----------------------------------------------------
// construction
//-----------------------------------------------------
nsDataObj::nsDataObj(nsIURI * uri)
: m_cRef(0), mTransferable(nullptr),
mIsAsyncMode(FALSE), mIsInOperation(FALSE)
{
mIOThread = new LazyIdleThread(DEFAULT_THREAD_TIMEOUT_MS,
NS_LITERAL_CSTRING("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 (PRUint32 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=NULL;
if ( (IID_IUnknown == riid) || (IID_IDataObject == riid) ) {
*ppv = this;
AddRef();
return S_OK;
} else if (IID_IAsyncOperation == riid) {
*ppv = static_cast<IAsyncOperation*>(this);
AddRef();
return S_OK;
}
return E_NOINTERFACE;
}
//-----------------------------------------------------
STDMETHODIMP_(ULONG) nsDataObj::AddRef()
{
++m_cRef;
NS_LOG_ADDREF(this, m_cRef, "nsDataObj", sizeof(*this));
return m_cRef;
}
//-----------------------------------------------------
STDMETHODIMP_(ULONG) nsDataObj::Release()
{
--m_cRef;
NS_LOG_RELEASE(this, m_cRef, "nsDataObj");
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. Delete file anyway and destroy this obj if there's a problem.
if (mCachedTempFile) {
nsresult rv;
mTimer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
mTimer->InitWithFuncCallback(nsDataObj::RemoveTempFile, this,
500, nsITimer::TYPE_ONE_SHOT);
return AddRef();
}
mCachedTempFile->Remove(false);
mCachedTempFile = NULL;
}
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;
PRUint32 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 = NULL; // 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_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 );
//PR_LOG(gWindowsLog, PR_LOG_ALWAYS,
// ("***** 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_FAIL;
}
//-----------------------------------------------------
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 = NULL;
if (aFormat->ptd != NULL)
return false;
// See if it's already in our list. If so return the data entry.
for (PRUint32 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 = NULL;
} // switch
if (NULL == *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 E_FAIL;
}
//-----------------------------------------------------
STDMETHODIMP nsDataObj::DUnadvise(DWORD dwConn)
{
return E_FAIL;
}
//-----------------------------------------------------
STDMETHODIMP nsDataObj::EnumDAdvise(LPENUMSTATDATA *ppEnum)
{
return E_FAIL;
}
// IAsyncOperation 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;
}
//-----------------------------------------------------
// GetData and SetData helper functions
//-----------------------------------------------------
HRESULT nsDataObj::AddSetFormat(FORMATETC& aFE)
{
return S_OK;
}
//-----------------------------------------------------
HRESULT nsDataObj::AddGetFormat(FORMATETC& aFE)
{
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 &, STGMEDIUM & aSTG )
{
ULONG result = E_FAIL;
PRUint32 len = 0;
nsCOMPtr<nsISupports> genericDataWrapper;
mTransferable->GetTransferData(PromiseFlatCString(inFlavor).get(), getter_AddRefs(genericDataWrapper), &len);
nsCOMPtr<imgIContainer> image ( do_QueryInterface(genericDataWrapper) );
if ( !image ) {
// Check if the image was put in an nsISupportsInterfacePointer wrapper.
// This might not be necessary any more, but could be useful for backwards
// compatibility.
nsCOMPtr<nsISupportsInterfacePointer> ptr(do_QueryInterface(genericDataWrapper));
if ( ptr )
ptr->GetData(getter_AddRefs(image));
}
if ( image ) {
// use the |nsImageToClipboard| helper class to build up a bitmap. We now own
// the bits, and pass them back to the OS in |aSTG|.
nsImageToClipboard converter ( image );
HANDLE bits = nullptr;
nsresult rv = converter.GetPicture ( &bits );
if ( NS_SUCCEEDED(rv) && bits ) {
aSTG.hGlobal = bits;
aSTG.tymed = TYMED_HGLOBAL;
result = S_OK;
}
} // if we have an image
else
NS_WARNING ( "Definitely not an image on clipboard" );
return result;
}
//
// 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
//
// Given a unicode string, we ensure that it contains only characters which are valid within
// the file system. Remove all forbidden characters from the name, and completely disallow
// any title that starts with a forbidden name and extension (e.g. "nul" is invalid, but
// "nul." and "nul.txt" are also invalid and will cause problems).
//
// It would seem that this is more functionality suited to being in nsIFile.
//
static void
MangleTextToValidFilename(nsString & aText)
{
static const char* forbiddenNames[] = {
"COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
"LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9",
"CON", "PRN", "AUX", "NUL", "CLOCK$"
};
aText.StripChars(FILE_PATH_SEPARATOR FILE_ILLEGAL_CHARACTERS);
aText.CompressWhitespace(true, true);
PRUint32 nameLen;
for (size_t n = 0; n < ArrayLength(forbiddenNames); ++n) {
nameLen = (PRUint32) strlen(forbiddenNames[n]);
if (aText.EqualsIgnoreCase(forbiddenNames[n], nameLen)) {
// invalid name is either the entire string, or a prefix with a period
if (aText.Length() == nameLen || aText.CharAt(nameLen) == PRUnichar('.')) {
aText.Truncate();
break;
}
}
}
}
//
// Given a unicode string, convert it down to a valid local charset filename
// with the supplied extension. 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
CreateFilenameFromTextA(nsString & aText, const char * aExtension,
char * aFilename, PRUint32 aFilenameLen)
{
// ensure that the supplied name doesn't have invalid characters. If
// a valid mangled filename couldn't be created then it will leave the
// text empty.
MangleTextToValidFilename(aText);
if (aText.IsEmpty())
return false;
// repeatably call WideCharToMultiByte as long as the title doesn't fit in the buffer
// available to us. Continually reduce the length of the source title until the MBCS
// version will fit in the buffer with room for the supplied extension. Doing it this
// way ensures that even in MBCS environments there will be a valid MBCS filename of
// the correct length.
int maxUsableFilenameLen = aFilenameLen - strlen(aExtension) - 1; // space for ext + null byte
int currLen, textLen = (int) NS_MIN(aText.Length(), aFilenameLen);
char defaultChar = '_';
do {
currLen = WideCharToMultiByte(CP_ACP,
WC_COMPOSITECHECK|WC_DEFAULTCHAR,
aText.get(), textLen--, aFilename, maxUsableFilenameLen, &defaultChar, NULL);
}
while (currLen == 0 && textLen > 0 && GetLastError() == ERROR_INSUFFICIENT_BUFFER);
if (currLen > 0 && textLen > 0) {
strcpy(&aFilename[currLen], aExtension);
return true;
}
else {
// empty names aren't permitted
return false;
}
}
static bool
CreateFilenameFromTextW(nsString & aText, const wchar_t * aExtension,
wchar_t * aFilename, PRUint32 aFilenameLen)
{
// ensure that the supplied name doesn't have invalid characters. If
// a valid mangled filename couldn't be created then it will leave the
// text empty.
MangleTextToValidFilename(aText);
if (aText.IsEmpty())
return false;
const int extensionLen = wcslen(aExtension);
if (aText.Length() + extensionLen + 1 > aFilenameLen)
aText.Truncate(aFilenameLen - extensionLen - 1);
wcscpy(&aFilename[0], aText.get());
wcscpy(&aFilename[aText.Length()], aExtension);
return true;
}
#define PAGEINFO_PROPERTIES "chrome://navigator/locale/pageInfo.properties"
static bool
GetLocalizedString(const PRUnichar * aName, nsXPIDLString & aString)
{
nsCOMPtr<nsIStringBundleService> stringService =
mozilla::services::GetStringBundleService();
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, getter_Copies(aString));
return NS_SUCCEEDED(rv);
}
//
// GetFileDescriptorInternetShortcut
//
// Create the special format for an internet shortcut and build up the data
// structures the shell is expecting.
//