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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 IEnumeFE_h__
#define IEnumeFE_h__
/*
* CEnumFormatEtc - implements IEnumFORMATETC
*/
#include <ole2.h>
#include "nsTArray.h"
#include "mozilla/Attributes.h"
// FORMATETC container
class FormatEtc {
public:
FormatEtc() { memset(&mFormat, 0, sizeof(FORMATETC)); }
FormatEtc(const FormatEtc& copy) { CopyIn(&copy.mFormat); }
~FormatEtc() {
if (mFormat.ptd) CoTaskMemFree(mFormat.ptd);
}
void CopyIn(const FORMATETC* aSrc) {
if (!aSrc) {
memset(&mFormat, 0, sizeof(FORMATETC));
return;
}
mFormat = *aSrc;
if (aSrc->ptd) {
mFormat.ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
*(mFormat.ptd) = *(aSrc->ptd);
}
}
void CopyOut(LPFORMATETC aDest) {
if (!aDest) return;
*aDest = mFormat;
if (mFormat.ptd) {
aDest->ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
*(aDest->ptd) = *(mFormat.ptd);
}
}
private:
FORMATETC mFormat;
};
/*
* CEnumFormatEtc is created within IDataObject::EnumFormatEtc. This object
* lives on its own, that is, QueryInterface only knows IUnknown and
* IEnumFormatEtc, nothing more. We still use an outer unknown for reference
* counting, because as long as this enumerator lives, the data object should
* live, thereby keeping the application up.
*/
class CEnumFormatEtc final : public IEnumFORMATETC {
public:
explicit CEnumFormatEtc(nsTArray<FormatEtc>& aArray);
CEnumFormatEtc();
~CEnumFormatEtc();
// IUnknown impl.
STDMETHODIMP QueryInterface(REFIID riid, LPVOID* ppv);
STDMETHODIMP_(ULONG) AddRef();
STDMETHODIMP_(ULONG) Release();
// IEnumFORMATETC impl.
STDMETHODIMP Next(ULONG aMaxToFetch, FORMATETC* aResult, ULONG* aNumFetched);
STDMETHODIMP Skip(ULONG aSkipNum);
STDMETHODIMP Reset();
STDMETHODIMP Clone(LPENUMFORMATETC* aResult); // Addrefs
// Utils
void AddFormatEtc(LPFORMATETC aFormat);
private:
nsTArray<FormatEtc> mFormatList; // Formats
ULONG mRefCnt; // Object reference count
ULONG mCurrentIdx; // Current element
void SetIndex(uint32_t aIdx);
};
#endif //_IENUMFE_H_