зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.4 KiB
C++
89 строки
2.4 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 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 ©) { CopyIn(©.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_
|