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comparison: widget/windows/IEnumFE.h
widget/windows/IEnumFE.h
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- TOR_BUG_9701
- changeset 10
- ac0c01689b40
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| -1:000000000000 | 0:f3b738c5a090 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef IEnumeFE_h__ | |
| 7 #define IEnumeFE_h__ | |
| 8 | |
| 9 /* | |
| 10 * CEnumFormatEtc - implements IEnumFORMATETC | |
| 11 */ | |
| 12 | |
| 13 #include <ole2.h> | |
| 14 | |
| 15 #include "nsTArray.h" | |
| 16 #include "mozilla/Attributes.h" | |
| 17 | |
| 18 // FORMATETC container | |
| 19 class FormatEtc | |
| 20 { | |
| 21 public: | |
| 22 FormatEtc() { memset(&mFormat, 0, sizeof(FORMATETC)); } | |
| 23 FormatEtc(const FormatEtc& copy) { CopyIn(©.mFormat); } | |
| 24 ~FormatEtc() { if (mFormat.ptd) CoTaskMemFree(mFormat.ptd); } | |
| 25 | |
| 26 void CopyIn(const FORMATETC *aSrc) { | |
| 27 if (!aSrc) { | |
| 28 memset(&mFormat, 0, sizeof(FORMATETC)); | |
| 29 return; | |
| 30 } | |
| 31 mFormat = *aSrc; | |
| 32 if (aSrc->ptd) { | |
| 33 mFormat.ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE)); | |
| 34 *(mFormat.ptd) = *(aSrc->ptd); | |
| 35 } | |
| 36 } | |
| 37 | |
| 38 void CopyOut(LPFORMATETC aDest) { | |
| 39 if (!aDest) | |
| 40 return; | |
| 41 *aDest = mFormat; | |
| 42 if (mFormat.ptd) { | |
| 43 aDest->ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE)); | |
| 44 *(aDest->ptd) = *(mFormat.ptd); | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 private: | |
| 49 FORMATETC mFormat; | |
| 50 }; | |
| 51 | |
| 52 /* | |
| 53 * CEnumFormatEtc is created within IDataObject::EnumFormatEtc. This object lives | |
| 54 * on its own, that is, QueryInterface only knows IUnknown and IEnumFormatEtc, | |
| 55 * nothing more. We still use an outer unknown for reference counting, because as | |
| 56 * long as this enumerator lives, the data object should live, thereby keeping the | |
| 57 * application up. | |
| 58 */ | |
| 59 | |
| 60 class CEnumFormatEtc MOZ_FINAL : public IEnumFORMATETC | |
| 61 { | |
| 62 public: | |
| 63 CEnumFormatEtc(nsTArray<FormatEtc>& aArray); | |
| 64 CEnumFormatEtc(); | |
| 65 ~CEnumFormatEtc(); | |
| 66 | |
| 67 // IUnknown impl. | |
| 68 STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppv); | |
| 69 STDMETHODIMP_(ULONG) AddRef(); | |
| 70 STDMETHODIMP_(ULONG) Release(); | |
| 71 | |
| 72 // IEnumFORMATETC impl. | |
| 73 STDMETHODIMP Next(ULONG aMaxToFetch, FORMATETC *aResult, ULONG *aNumFetched); | |
| 74 STDMETHODIMP Skip(ULONG aSkipNum); | |
| 75 STDMETHODIMP Reset(); | |
| 76 STDMETHODIMP Clone(LPENUMFORMATETC *aResult); // Addrefs | |
| 77 | |
| 78 // Utils | |
| 79 void AddFormatEtc(LPFORMATETC aFormat); | |
| 80 | |
| 81 private: | |
| 82 nsTArray<FormatEtc> mFormatList; // Formats | |
| 83 ULONG mRefCnt; // Object reference count | |
| 84 ULONG mCurrentIdx; // Current element | |
| 85 | |
| 86 void SetIndex(uint32_t aIdx); | |
| 87 }; | |
| 88 | |
| 89 | |
| 90 #endif //_IENUMFE_H_ |
