widget/windows/IEnumFE.h@ac0c01689b40 (annotated)
widget/windows/IEnumFE.h
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef IEnumeFE_h__ |
| michael@0 | 7 | #define IEnumeFE_h__ |
| michael@0 | 8 | |
| michael@0 | 9 | /* |
| michael@0 | 10 | * CEnumFormatEtc - implements IEnumFORMATETC |
| michael@0 | 11 | */ |
| michael@0 | 12 | |
| michael@0 | 13 | #include <ole2.h> |
| michael@0 | 14 | |
| michael@0 | 15 | #include "nsTArray.h" |
| michael@0 | 16 | #include "mozilla/Attributes.h" |
| michael@0 | 17 | |
| michael@0 | 18 | // FORMATETC container |
| michael@0 | 19 | class FormatEtc |
| michael@0 | 20 | { |
| michael@0 | 21 | public: |
| michael@0 | 22 | FormatEtc() { memset(&mFormat, 0, sizeof(FORMATETC)); } |
| michael@0 | 23 | FormatEtc(const FormatEtc& copy) { CopyIn(©.mFormat); } |
| michael@0 | 24 | ~FormatEtc() { if (mFormat.ptd) CoTaskMemFree(mFormat.ptd); } |
| michael@0 | 25 | |
| michael@0 | 26 | void CopyIn(const FORMATETC *aSrc) { |
| michael@0 | 27 | if (!aSrc) { |
| michael@0 | 28 | memset(&mFormat, 0, sizeof(FORMATETC)); |
| michael@0 | 29 | return; |
| michael@0 | 30 | } |
| michael@0 | 31 | mFormat = *aSrc; |
| michael@0 | 32 | if (aSrc->ptd) { |
| michael@0 | 33 | mFormat.ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE)); |
| michael@0 | 34 | *(mFormat.ptd) = *(aSrc->ptd); |
| michael@0 | 35 | } |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | void CopyOut(LPFORMATETC aDest) { |
| michael@0 | 39 | if (!aDest) |
| michael@0 | 40 | return; |
| michael@0 | 41 | *aDest = mFormat; |
| michael@0 | 42 | if (mFormat.ptd) { |
| michael@0 | 43 | aDest->ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE)); |
| michael@0 | 44 | *(aDest->ptd) = *(mFormat.ptd); |
| michael@0 | 45 | } |
| michael@0 | 46 | } |
| michael@0 | 47 | |
| michael@0 | 48 | private: |
| michael@0 | 49 | FORMATETC mFormat; |
| michael@0 | 50 | }; |
| michael@0 | 51 | |
| michael@0 | 52 | /* |
| michael@0 | 53 | * CEnumFormatEtc is created within IDataObject::EnumFormatEtc. This object lives |
| michael@0 | 54 | * on its own, that is, QueryInterface only knows IUnknown and IEnumFormatEtc, |
| michael@0 | 55 | * nothing more. We still use an outer unknown for reference counting, because as |
| michael@0 | 56 | * long as this enumerator lives, the data object should live, thereby keeping the |
| michael@0 | 57 | * application up. |
| michael@0 | 58 | */ |
| michael@0 | 59 | |
| michael@0 | 60 | class CEnumFormatEtc MOZ_FINAL : public IEnumFORMATETC |
| michael@0 | 61 | { |
| michael@0 | 62 | public: |
| michael@0 | 63 | CEnumFormatEtc(nsTArray<FormatEtc>& aArray); |
| michael@0 | 64 | CEnumFormatEtc(); |
| michael@0 | 65 | ~CEnumFormatEtc(); |
| michael@0 | 66 | |
| michael@0 | 67 | // IUnknown impl. |
| michael@0 | 68 | STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppv); |
| michael@0 | 69 | STDMETHODIMP_(ULONG) AddRef(); |
| michael@0 | 70 | STDMETHODIMP_(ULONG) Release(); |
| michael@0 | 71 | |
| michael@0 | 72 | // IEnumFORMATETC impl. |
| michael@0 | 73 | STDMETHODIMP Next(ULONG aMaxToFetch, FORMATETC *aResult, ULONG *aNumFetched); |
| michael@0 | 74 | STDMETHODIMP Skip(ULONG aSkipNum); |
| michael@0 | 75 | STDMETHODIMP Reset(); |
| michael@0 | 76 | STDMETHODIMP Clone(LPENUMFORMATETC *aResult); // Addrefs |
| michael@0 | 77 | |
| michael@0 | 78 | // Utils |
| michael@0 | 79 | void AddFormatEtc(LPFORMATETC aFormat); |
| michael@0 | 80 | |
| michael@0 | 81 | private: |
| michael@0 | 82 | nsTArray<FormatEtc> mFormatList; // Formats |
| michael@0 | 83 | ULONG mRefCnt; // Object reference count |
| michael@0 | 84 | ULONG mCurrentIdx; // Current element |
| michael@0 | 85 | |
| michael@0 | 86 | void SetIndex(uint32_t aIdx); |
| michael@0 | 87 | }; |
| michael@0 | 88 | |
| michael@0 | 89 | |
| michael@0 | 90 | #endif //_IENUMFE_H_ |
