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/. */
6 /* constants for frame state bits and a type to store them in a uint64_t */
8 #ifndef nsFrameState_h_
9 #define nsFrameState_h_
19 typedef uint64_t nsFrameState_size_t
;
21 #define NS_FRAME_STATE_BIT(n_) (nsFrameState(nsFrameState_size_t(1) << (n_)))
23 #if (_MSC_VER == 1600)
25 * Visual Studio 2010 has trouble with the sized enum. Although sized enums
26 * are supported, two problems arise:
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.
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.)
38 typedef nsFrameState_size_t nsFrameState
;
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
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
54 inline nsFrameState
operator|(nsFrameState aLeft
, nsFrameState aRight
)
56 return nsFrameState(nsFrameState_size_t(aLeft
) | nsFrameState_size_t(aRight
));
59 inline nsFrameState
operator&(nsFrameState aLeft
, nsFrameState aRight
)
61 return nsFrameState(nsFrameState_size_t(aLeft
) & nsFrameState_size_t(aRight
));
64 inline nsFrameState
& operator|=(nsFrameState
& aLeft
, nsFrameState aRight
)
66 aLeft
= aLeft
| aRight
;
70 inline nsFrameState
& operator&=(nsFrameState
& aLeft
, nsFrameState aRight
)
72 aLeft
= aLeft
& aRight
;
76 inline nsFrameState
operator~(nsFrameState aRight
)
78 return nsFrameState(~nsFrameState_size_t(aRight
));
81 inline nsFrameState
operator^(nsFrameState aLeft
, nsFrameState aRight
)
83 return nsFrameState(nsFrameState_size_t(aLeft
) ^ nsFrameState_size_t(aRight
));
86 inline nsFrameState
& operator^=(nsFrameState
& aLeft
, nsFrameState aRight
)
88 aLeft
= aLeft
^ aRight
;
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
100 nsCString
GetFrameState(nsIFrame
* aFrame
);
101 void PrintFrameState(nsIFrame
* aFrame
);
105 #endif /* nsFrameState_h_ */