The Tor Browser / file comparison
comparison: layout/generic/nsFrameState.h
layout/generic/nsFrameState.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:4797427d92b4 |
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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 /* constants for frame state bits and a type to store them in a uint64_t */ | |
| 7 | |
| 8 #ifndef nsFrameState_h_ | |
| 9 #define nsFrameState_h_ | |
| 10 | |
| 11 #include <stdint.h> | |
| 12 | |
| 13 #ifdef DEBUG | |
| 14 #include "nsString.h" | |
| 15 | |
| 16 class nsIFrame; | |
| 17 #endif | |
| 18 | |
| 19 typedef uint64_t nsFrameState_size_t; | |
| 20 | |
| 21 #define NS_FRAME_STATE_BIT(n_) (nsFrameState(nsFrameState_size_t(1) << (n_))) | |
| 22 | |
| 23 #if (_MSC_VER == 1600) | |
| 24 /* | |
| 25 * Visual Studio 2010 has trouble with the sized enum. Although sized enums | |
| 26 * are supported, two problems arise: | |
| 27 * | |
| 28 * 1. Implicit conversions from the enum type to the equivalently sized | |
| 29 * integer size are not performed, leading to many compile errors. | |
| 30 * 2. Even with explicit casts added to avoid the errors from (1), odd | |
| 31 * test failures result, which might well be due to a compiler bug. | |
| 32 * | |
| 33 * So with VS2010 we use consts for the state bits and forgo the increased | |
| 34 * type safety of the enum. (Visual Studio 2012 has no problem with | |
| 35 * nsFrameState being a sized enum, however.) | |
| 36 */ | |
| 37 | |
| 38 typedef nsFrameState_size_t nsFrameState; | |
| 39 | |
| 40 #define FRAME_STATE_BIT(group_, value_, name_) \ | |
| 41 const nsFrameState name_ = NS_FRAME_STATE_BIT(value_); | |
| 42 #include "nsFrameStateBits.h" | |
| 43 #undef FRAME_STATE_BIT | |
| 44 | |
| 45 #else | |
| 46 | |
| 47 enum nsFrameState : nsFrameState_size_t { | |
| 48 #define FRAME_STATE_BIT(group_, value_, name_) \ | |
| 49 name_ = NS_FRAME_STATE_BIT(value_), | |
| 50 #include "nsFrameStateBits.h" | |
| 51 #undef FRAME_STATE_BIT | |
| 52 }; | |
| 53 | |
| 54 inline nsFrameState operator|(nsFrameState aLeft, nsFrameState aRight) | |
| 55 { | |
| 56 return nsFrameState(nsFrameState_size_t(aLeft) | nsFrameState_size_t(aRight)); | |
| 57 } | |
| 58 | |
| 59 inline nsFrameState operator&(nsFrameState aLeft, nsFrameState aRight) | |
| 60 { | |
| 61 return nsFrameState(nsFrameState_size_t(aLeft) & nsFrameState_size_t(aRight)); | |
| 62 } | |
| 63 | |
| 64 inline nsFrameState& operator|=(nsFrameState& aLeft, nsFrameState aRight) | |
| 65 { | |
| 66 aLeft = aLeft | aRight; | |
| 67 return aLeft; | |
| 68 } | |
| 69 | |
| 70 inline nsFrameState& operator&=(nsFrameState& aLeft, nsFrameState aRight) | |
| 71 { | |
| 72 aLeft = aLeft & aRight; | |
| 73 return aLeft; | |
| 74 } | |
| 75 | |
| 76 inline nsFrameState operator~(nsFrameState aRight) | |
| 77 { | |
| 78 return nsFrameState(~nsFrameState_size_t(aRight)); | |
| 79 } | |
| 80 | |
| 81 inline nsFrameState operator^(nsFrameState aLeft, nsFrameState aRight) | |
| 82 { | |
| 83 return nsFrameState(nsFrameState_size_t(aLeft) ^ nsFrameState_size_t(aRight)); | |
| 84 } | |
| 85 | |
| 86 inline nsFrameState& operator^=(nsFrameState& aLeft, nsFrameState aRight) | |
| 87 { | |
| 88 aLeft = aLeft ^ aRight; | |
| 89 return aLeft; | |
| 90 } | |
| 91 | |
| 92 #endif | |
| 93 | |
| 94 // Bits 20-31 and 60-63 of the frame state are reserved for implementations. | |
| 95 #define NS_FRAME_IMPL_RESERVED nsFrameState(0xF0000000FFF00000) | |
| 96 #define NS_FRAME_RESERVED ~NS_FRAME_IMPL_RESERVED | |
| 97 | |
| 98 namespace mozilla { | |
| 99 #ifdef DEBUG | |
| 100 nsCString GetFrameState(nsIFrame* aFrame); | |
| 101 void PrintFrameState(nsIFrame* aFrame); | |
| 102 #endif | |
| 103 } | |
| 104 | |
| 105 #endif /* nsFrameState_h_ */ |
