зеркало из https://github.com/mozilla/gecko-dev.git
242 строки
9.0 KiB
C++
242 строки
9.0 KiB
C++
/* -*- 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;
|
|
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 IDataObjectAsyncCapability {
|
|
nsCOMPtr<nsIThread> mIOThread;
|
|
|
|
public: // construction, destruction
|
|
explicit nsDataObj(nsIURI* uri = nullptr);
|
|
|
|
protected:
|
|
virtual ~nsDataObj();
|
|
|
|
public: // IUnknown methods - see iunknown.h for documentation
|
|
STDMETHODIMP_(ULONG) AddRef() override;
|
|
STDMETHODIMP QueryInterface(REFIID, void**) override;
|
|
STDMETHODIMP_(ULONG) Release() override;
|
|
|
|
// support for clipboard
|
|
virtual void AddDataFlavor(const char* aDataFlavor, LPFORMATETC aFE);
|
|
void SetTransferable(nsITransferable* aTransferable);
|
|
|
|
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) override;
|
|
|
|
// Similar to GetData except that the caller allocates the structure
|
|
// referenced by pSTM.
|
|
STDMETHODIMP GetDataHere(LPFORMATETC pFE, LPSTGMEDIUM pSTM) override;
|
|
|
|
// Returns S_TRUE if this object supports the format specified by pSTM,
|
|
// S_FALSE otherwise.
|
|
STDMETHODIMP QueryGetData(LPFORMATETC pFE) override;
|
|
|
|
// 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) final;
|
|
|
|
// 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) override;
|
|
|
|
// 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) final;
|
|
|
|
// 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) final;
|
|
|
|
// Turn off advising of a previous call to DAdvise which set pConn.
|
|
STDMETHODIMP DUnadvise(DWORD pConn) final;
|
|
|
|
// 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) final;
|
|
|
|
// IDataObjectAsyncCapability methods
|
|
STDMETHODIMP EndOperation(HRESULT hResult, IBindCtx* pbcReserved,
|
|
DWORD dwEffects) final;
|
|
STDMETHODIMP GetAsyncMode(BOOL* pfIsOpAsync) final;
|
|
STDMETHODIMP InOperation(BOOL* pfInAsyncOp) final;
|
|
STDMETHODIMP SetAsyncMode(BOOL fDoOpAsync) final;
|
|
STDMETHODIMP StartOperation(IBindCtx* pbcReserved) final;
|
|
|
|
private: // other methods
|
|
// Gets the filename from the kFilePromiseURLMime flavour
|
|
HRESULT GetDownloadDetails(nsIURI** aSourceURI, nsAString& aFilename);
|
|
|
|
// help determine the kind of drag
|
|
bool IsFlavourPresent(const char* inFlavour);
|
|
|
|
protected:
|
|
HRESULT GetFile(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT GetText(const nsACString& aDF, FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
|
|
private:
|
|
HRESULT GetDib(const nsACString& inFlavor, FORMATETC&, STGMEDIUM& aSTG);
|
|
|
|
HRESULT DropImage(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT DropFile(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT DropTempFile(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
|
|
HRESULT GetUniformResourceLocator(FORMATETC& aFE, STGMEDIUM& aSTG,
|
|
bool aIsUnicode);
|
|
HRESULT ExtractUniformResourceLocatorA(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT ExtractUniformResourceLocatorW(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT GetFileDescriptor(FORMATETC& aFE, STGMEDIUM& aSTG, bool aIsUnicode);
|
|
|
|
protected:
|
|
HRESULT GetFileContents(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
|
|
private:
|
|
HRESULT GetPreferredDropEffect(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
|
|
// Provide the structures needed for an internet shortcut by the shell
|
|
HRESULT GetFileDescriptorInternetShortcutA(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT GetFileDescriptorInternetShortcutW(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT GetFileContentsInternetShortcut(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
|
|
// IStream implementation
|
|
HRESULT GetFileDescriptor_IStreamA(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
HRESULT GetFileDescriptor_IStreamW(FORMATETC& aFE, STGMEDIUM& aSTG);
|
|
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;
|
|
|
|
protected:
|
|
BOOL FormatsMatch(const FORMATETC& source, const FORMATETC& target) const;
|
|
|
|
ULONG m_cRef; // the reference count
|
|
|
|
private:
|
|
nsTArray<nsCString> mDataFlavors;
|
|
|
|
nsITransferable* mTransferable; // nsDataObj owns and ref counts
|
|
// nsITransferable, the nsITransferable does
|
|
// know anything about the nsDataObj
|
|
|
|
protected:
|
|
CEnumFormatEtc* m_enumFE; // Ownership Rules:
|
|
// nsDataObj owns and ref counts CEnumFormatEtc,
|
|
|
|
private:
|
|
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 final : public IStream, public nsIStreamListener {
|
|
nsCOMPtr<nsIChannel> mChannel;
|
|
FallibleTArray<uint8_t> mChannelData;
|
|
bool mChannelRead;
|
|
nsresult mChannelResult;
|
|
uint32_t mStreamRead;
|
|
|
|
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) override;
|
|
|
|
// IStream
|
|
STDMETHODIMP Clone(IStream** ppStream) final;
|
|
STDMETHODIMP Commit(DWORD dwFrags) final;
|
|
STDMETHODIMP CopyTo(IStream* pDestStream, ULARGE_INTEGER nBytesToCopy,
|
|
ULARGE_INTEGER* nBytesRead,
|
|
ULARGE_INTEGER* nBytesWritten) final;
|
|
STDMETHODIMP LockRegion(ULARGE_INTEGER nStart, ULARGE_INTEGER nBytes,
|
|
DWORD dwFlags) final;
|
|
STDMETHODIMP Read(void* pvBuffer, ULONG nBytesToRead,
|
|
ULONG* nBytesRead) final;
|
|
STDMETHODIMP Revert(void) final;
|
|
STDMETHODIMP Seek(LARGE_INTEGER nMove, DWORD dwOrigin,
|
|
ULARGE_INTEGER* nNewPos) final;
|
|
STDMETHODIMP SetSize(ULARGE_INTEGER nNewSize) final;
|
|
STDMETHODIMP Stat(STATSTG* statstg, DWORD dwFlags) final;
|
|
STDMETHODIMP UnlockRegion(ULARGE_INTEGER nStart, ULARGE_INTEGER nBytes,
|
|
DWORD dwFlags) final;
|
|
STDMETHODIMP Write(const void* pvBuffer, ULONG nBytesToRead,
|
|
ULONG* nBytesRead) final;
|
|
};
|
|
|
|
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_
|