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gecko-dev/widget/windows/nsDataObj.h
Makoto Kato bc65875221 Bug 1372063 - Use fallible array to avoid OOM. r=jimm 
Although mChannelData uses infallible array, OOM occurs by AppendElements since clipboard data is too large.  So we should use fallible array instead.

MozReview-Commit-ID: KdIWv2jGbDK

--HG--
extra : rebase_source : fe663b7f88d9d20bfb690fe0e17ec3652bd85231
2017-06-12 12:12:30 +09:00

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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/. */
#ifndef _NSDATAOBJ_H_
#define _NSDATAOBJ_H_
#include <oleidl.h>
#include <shldisp.h>
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIFile.h"
#include "nsIURI.h"
#include "nsIInputStream.h"
#include "nsIStreamListener.h"
#include "nsIChannel.h"
#include "nsCOMArray.h"
#include "nsITimer.h"
class nsIThread;
class nsIPrincipal;
// The SDK shipping with VC11 has renamed IAsyncOperation to
// IDataObjectAsyncCapability. We try to detect this, and rename this in our
// code too to make sure that we pick the correct name when building.
#ifdef __IDataObjectAsyncCapability_INTERFACE_DEFINED__
#define IAsyncOperation IDataObjectAsyncCapability
#define IID_IAsyncOperation IID_IDataObjectAsyncCapability
#else
// XXX for older version of PSDK where IAsyncOperation and related stuff is not available
// but thisdefine should be removed when parocles config is updated
#ifndef __IAsyncOperation_INTERFACE_DEFINED__
// IAsyncOperation interface definition
EXTERN_C const IID IID_IAsyncOperation;
MIDL_INTERFACE("3D8B0590-F691-11d2-8EA9-006097DF5BD4")
IAsyncOperation : public IUnknown
{
virtual HRESULT STDMETHODCALLTYPE SetAsyncMode(BOOL fDoOpAsync) = 0;
virtual HRESULT STDMETHODCALLTYPE GetAsyncMode(BOOL *pfIsOpAsync) = 0;
virtual HRESULT STDMETHODCALLTYPE StartOperation(IBindCtx *pbcReserved) = 0;
virtual HRESULT STDMETHODCALLTYPE InOperation(BOOL *pfInAsyncOp) = 0;
virtual HRESULT STDMETHODCALLTYPE EndOperation(HRESULT hResult,
IBindCtx *pbcReserved,
DWORD dwEffects) = 0;
};
// this is not defined in the old headers for some reason
#ifndef FD_PROGRESSUI
#define FD_PROGRESSUI 0x4000
#endif
#endif // __IAsyncOperation_INTERFACE_DEFINED__
#endif // __IDataObjectAsyncCapability_INTERFACE_DEFINED__
/*
* CFSTR_SHELLURL is deprecated and doesn't have a Unicode version.
* Therefore we are using CFSTR_INETURL instead of CFSTR_SHELLURL.
* See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_programming/transferring/clipboard.asp
*/
#ifndef CFSTR_INETURLA
#define CFSTR_INETURLA L"UniformResourceLocator"
#endif
#ifndef CFSTR_INETURLW
#define CFSTR_INETURLW L"UniformResourceLocatorW"
#endif
// For support of MinGW w32api v2.4.
// When the next version of w32api is released with shlobj.h rev 1.35
// http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/winsup/w32api/include/shlobj.h?cvsroot=src
// then that can be made the base required version and this code should be removed.
#ifndef CFSTR_FILEDESCRIPTORA
# define CFSTR_FILEDESCRIPTORA L"FileGroupDescriptor"
#endif
#ifndef CFSTR_FILEDESCRIPTORW
# define CFSTR_FILEDESCRIPTORW L"FileGroupDescriptorW"
#endif
class CEnumFormatEtc;
class nsITransferable;
/*
* This ole registered class is used to facilitate drag-drop of objects which
* can be adapted by an object derived from CfDragDrop. The CfDragDrop is
* associated with instances via SetDragDrop().
*/
class nsDataObj : public IDataObject,
public IAsyncOperation
{
protected:
nsCOMPtr<nsIThread> mIOThread;
public: // construction, destruction
explicit nsDataObj(nsIURI *uri = nullptr);
virtual ~nsDataObj();
public: // IUnknown methods - see iunknown.h for documentation
STDMETHODIMP_(ULONG) AddRef ();
STDMETHODIMP QueryInterface(REFIID, void**);
STDMETHODIMP_(ULONG) Release ();
// support for clipboard
virtual void AddDataFlavor(const char* aDataFlavor, LPFORMATETC aFE);
void SetTransferable(nsITransferable * aTransferable);
// Return the registered OLE class ID of this object's CfDataObj.
CLSID GetClassID() const;
public: // IDataObject methods - these are general comments. see CfDragDrop
// for overriding behavior
// Store data in pSTM according to the format specified by pFE, if the
// format is supported (supported formats are specified in CfDragDrop::
// GetFormats) and return NOERROR; otherwise return DATA_E_FORMATETC. It
// is the callers responsibility to free pSTM if NOERROR is returned.
STDMETHODIMP GetData (LPFORMATETC pFE, LPSTGMEDIUM pSTM);
// Similar to GetData except that the caller allocates the structure
// referenced by pSTM.
STDMETHODIMP GetDataHere (LPFORMATETC pFE, LPSTGMEDIUM pSTM);
// Returns S_TRUE if this object supports the format specified by pSTM,
// S_FALSE otherwise.
STDMETHODIMP QueryGetData (LPFORMATETC pFE);
// Set pCanonFE to the canonical format of pFE if one exists and return
// NOERROR, otherwise return DATA_S_SAMEFORMATETC. A canonical format
// implies an identical rendering.
STDMETHODIMP GetCanonicalFormatEtc (LPFORMATETC pFE, LPFORMATETC pCanonFE);
// Set this objects data according to the format specified by pFE and
// the storage medium specified by pSTM and return NOERROR, if the format
// is supported. If release is TRUE this object must release the storage
// associated with pSTM.
STDMETHODIMP SetData (LPFORMATETC pFE, LPSTGMEDIUM pSTM, BOOL release);
// Set ppEnum to an IEnumFORMATETC object which will iterate all of the
// data formats that this object supports. direction is either DATADIR_GET
// or DATADIR_SET.
STDMETHODIMP EnumFormatEtc (DWORD direction, LPENUMFORMATETC* ppEnum);
// Set up an advisory connection to this object based on the format specified
// by pFE, flags, and the pAdvise. Set pConn to the established advise
// connection.
STDMETHODIMP DAdvise (LPFORMATETC pFE, DWORD flags, LPADVISESINK pAdvise,
DWORD* pConn);
// Turn off advising of a previous call to DAdvise which set pConn.
STDMETHODIMP DUnadvise (DWORD pConn);
// Set ppEnum to an IEnumSTATDATA object which will iterate over the
// existing objects which have established advisory connections to this
// object.
STDMETHODIMP EnumDAdvise (LPENUMSTATDATA *ppEnum);
// IAsyncOperation methods
STDMETHOD(EndOperation)(HRESULT hResult, IBindCtx *pbcReserved, DWORD dwEffects);
STDMETHOD(GetAsyncMode)(BOOL *pfIsOpAsync);
STDMETHOD(InOperation)(BOOL *pfInAsyncOp);
STDMETHOD(SetAsyncMode)(BOOL fDoOpAsync);
STDMETHOD(StartOperation)(IBindCtx *pbcReserved);
public: // other methods
// Gets the filename from the kFilePromiseURLMime flavour
HRESULT GetDownloadDetails(nsIURI **aSourceURI,
nsAString &aFilename);
protected:
// help determine the kind of drag
bool IsFlavourPresent(const char *inFlavour);
virtual HRESULT AddSetFormat(FORMATETC& FE);
virtual HRESULT AddGetFormat(FORMATETC& FE);
virtual HRESULT GetFile ( FORMATETC& aFE, STGMEDIUM& aSTG );
virtual HRESULT GetText ( const nsACString& aDF, FORMATETC& aFE, STGMEDIUM & aSTG );
virtual HRESULT GetDib ( const nsACString& inFlavor, FORMATETC &, STGMEDIUM & aSTG );
virtual HRESULT GetMetafilePict(FORMATETC& FE, STGMEDIUM& STM);
virtual HRESULT DropImage( FORMATETC& aFE, STGMEDIUM& aSTG );
virtual HRESULT DropFile( FORMATETC& aFE, STGMEDIUM& aSTG );
virtual HRESULT DropTempFile( FORMATETC& aFE, STGMEDIUM& aSTG );
virtual HRESULT GetUniformResourceLocator ( FORMATETC& aFE, STGMEDIUM& aSTG, bool aIsUnicode ) ;
virtual HRESULT ExtractUniformResourceLocatorA ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT ExtractUniformResourceLocatorW ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT GetFileDescriptor ( FORMATETC& aFE, STGMEDIUM& aSTG, bool aIsUnicode ) ;
virtual HRESULT GetFileContents ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT GetPreferredDropEffect ( FORMATETC& aFE, STGMEDIUM& aSTG );
virtual HRESULT SetBitmap(FORMATETC& FE, STGMEDIUM& STM);
virtual HRESULT SetDib (FORMATETC& FE, STGMEDIUM& STM);
virtual HRESULT SetText (FORMATETC& FE, STGMEDIUM& STM);
virtual HRESULT SetMetafilePict(FORMATETC& FE, STGMEDIUM& STM);
// Provide the structures needed for an internet shortcut by the shell
virtual HRESULT GetFileDescriptorInternetShortcutA ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT GetFileDescriptorInternetShortcutW ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT GetFileContentsInternetShortcut ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
// IStream implementation
virtual HRESULT GetFileDescriptor_IStreamA ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT GetFileDescriptor_IStreamW ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
virtual HRESULT GetFileContents_IStream ( FORMATETC& aFE, STGMEDIUM& aSTG ) ;
nsresult ExtractShortcutURL ( nsString & outURL ) ;
nsresult ExtractShortcutTitle ( nsString & outTitle ) ;
// munge our HTML data to win32's CF_HTML spec. Will null terminate
nsresult BuildPlatformHTML ( const char* inOurHTML, char** outPlatformHTML ) ;
// Used for the SourceURL part of CF_HTML
nsCString mSourceURL;
BOOL FormatsMatch(const FORMATETC& source, const FORMATETC& target) const;
ULONG m_cRef; // the reference count
nsTArray<nsCString> mDataFlavors;
nsITransferable * mTransferable; // nsDataObj owns and ref counts nsITransferable,
// the nsITransferable does know anything about the nsDataObj
CEnumFormatEtc * m_enumFE; // Ownership Rules:
// nsDataObj owns and ref counts CEnumFormatEtc,
nsCOMPtr<nsIFile> mCachedTempFile;
BOOL mIsAsyncMode;
BOOL mIsInOperation;
///////////////////////////////////////////////////////////////////////////////
// CStream class implementation
// this class is used in Drag and drop with download sample
// called from IDataObject::GetData
class CStream : public IStream, public nsIStreamListener
{
nsCOMPtr<nsIChannel> mChannel;
FallibleTArray<uint8_t> mChannelData;
bool mChannelRead;
nsresult mChannelResult;
uint32_t mStreamRead;
protected:
virtual ~CStream();
nsresult WaitForCompletion();
public:
CStream();
nsresult Init(nsIURI *pSourceURI,
uint32_t aContentPolicyType,
nsIPrincipal* aRequestingPrincipal);
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
// IUnknown
STDMETHOD(QueryInterface)(REFIID refiid, void** ppvResult);
// IStream
STDMETHOD(Clone)(IStream** ppStream);
STDMETHOD(Commit)(DWORD dwFrags);
STDMETHOD(CopyTo)(IStream* pDestStream, ULARGE_INTEGER nBytesToCopy, ULARGE_INTEGER* nBytesRead, ULARGE_INTEGER* nBytesWritten);
STDMETHOD(LockRegion)(ULARGE_INTEGER nStart, ULARGE_INTEGER nBytes, DWORD dwFlags);
STDMETHOD(Read)(void* pvBuffer, ULONG nBytesToRead, ULONG* nBytesRead);
STDMETHOD(Revert)(void);
STDMETHOD(Seek)(LARGE_INTEGER nMove, DWORD dwOrigin, ULARGE_INTEGER* nNewPos);
STDMETHOD(SetSize)(ULARGE_INTEGER nNewSize);
STDMETHOD(Stat)(STATSTG* statstg, DWORD dwFlags);
STDMETHOD(UnlockRegion)(ULARGE_INTEGER nStart, ULARGE_INTEGER nBytes, DWORD dwFlags);
STDMETHOD(Write)(const void* pvBuffer, ULONG nBytesToRead, ULONG* nBytesRead);
};
HRESULT CreateStream(IStream **outStream);
private:
// Drag and drop helper data for implementing drag and drop image support
typedef struct {
FORMATETC fe;
STGMEDIUM stgm;
} DATAENTRY, *LPDATAENTRY;
nsTArray <LPDATAENTRY> mDataEntryList;
nsCOMPtr<nsITimer> mTimer;
bool LookupArbitraryFormat(FORMATETC *aFormat, LPDATAENTRY *aDataEntry, BOOL aAddorUpdate);
bool CopyMediumData(STGMEDIUM *aMediumDst, STGMEDIUM *aMediumSrc, LPFORMATETC aFormat, BOOL aSetData);
};
#endif // _NSDATAOBJ_H_
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