1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/generic/nsFrameState.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,105 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* constants for frame state bits and a type to store them in a uint64_t */
1.10 +
1.11 +#ifndef nsFrameState_h_
1.12 +#define nsFrameState_h_
1.13 +
1.14 +#include <stdint.h>
1.15 +
1.16 +#ifdef DEBUG
1.17 +#include "nsString.h"
1.18 +
1.19 +class nsIFrame;
1.20 +#endif
1.21 +
1.22 +typedef uint64_t nsFrameState_size_t;
1.23 +
1.24 +#define NS_FRAME_STATE_BIT(n_) (nsFrameState(nsFrameState_size_t(1) << (n_)))
1.25 +
1.26 +#if (_MSC_VER == 1600)
1.27 +/*
1.28 + * Visual Studio 2010 has trouble with the sized enum. Although sized enums
1.29 + * are supported, two problems arise:
1.30 + *
1.31 + * 1. Implicit conversions from the enum type to the equivalently sized
1.32 + * integer size are not performed, leading to many compile errors.
1.33 + * 2. Even with explicit casts added to avoid the errors from (1), odd
1.34 + * test failures result, which might well be due to a compiler bug.
1.35 + *
1.36 + * So with VS2010 we use consts for the state bits and forgo the increased
1.37 + * type safety of the enum. (Visual Studio 2012 has no problem with
1.38 + * nsFrameState being a sized enum, however.)
1.39 + */
1.40 +
1.41 +typedef nsFrameState_size_t nsFrameState;
1.42 +
1.43 +#define FRAME_STATE_BIT(group_, value_, name_) \
1.44 +const nsFrameState name_ = NS_FRAME_STATE_BIT(value_);
1.45 +#include "nsFrameStateBits.h"
1.46 +#undef FRAME_STATE_BIT
1.47 +
1.48 +#else
1.49 +
1.50 +enum nsFrameState : nsFrameState_size_t {
1.51 +#define FRAME_STATE_BIT(group_, value_, name_) \
1.52 + name_ = NS_FRAME_STATE_BIT(value_),
1.53 +#include "nsFrameStateBits.h"
1.54 +#undef FRAME_STATE_BIT
1.55 +};
1.56 +
1.57 +inline nsFrameState operator|(nsFrameState aLeft, nsFrameState aRight)
1.58 +{
1.59 + return nsFrameState(nsFrameState_size_t(aLeft) | nsFrameState_size_t(aRight));
1.60 +}
1.61 +
1.62 +inline nsFrameState operator&(nsFrameState aLeft, nsFrameState aRight)
1.63 +{
1.64 + return nsFrameState(nsFrameState_size_t(aLeft) & nsFrameState_size_t(aRight));
1.65 +}
1.66 +
1.67 +inline nsFrameState& operator|=(nsFrameState& aLeft, nsFrameState aRight)
1.68 +{
1.69 + aLeft = aLeft | aRight;
1.70 + return aLeft;
1.71 +}
1.72 +
1.73 +inline nsFrameState& operator&=(nsFrameState& aLeft, nsFrameState aRight)
1.74 +{
1.75 + aLeft = aLeft & aRight;
1.76 + return aLeft;
1.77 +}
1.78 +
1.79 +inline nsFrameState operator~(nsFrameState aRight)
1.80 +{
1.81 + return nsFrameState(~nsFrameState_size_t(aRight));
1.82 +}
1.83 +
1.84 +inline nsFrameState operator^(nsFrameState aLeft, nsFrameState aRight)
1.85 +{
1.86 + return nsFrameState(nsFrameState_size_t(aLeft) ^ nsFrameState_size_t(aRight));
1.87 +}
1.88 +
1.89 +inline nsFrameState& operator^=(nsFrameState& aLeft, nsFrameState aRight)
1.90 +{
1.91 + aLeft = aLeft ^ aRight;
1.92 + return aLeft;
1.93 +}
1.94 +
1.95 +#endif
1.96 +
1.97 +// Bits 20-31 and 60-63 of the frame state are reserved for implementations.
1.98 +#define NS_FRAME_IMPL_RESERVED nsFrameState(0xF0000000FFF00000)
1.99 +#define NS_FRAME_RESERVED ~NS_FRAME_IMPL_RESERVED
1.100 +
1.101 +namespace mozilla {
1.102 +#ifdef DEBUG
1.103 +nsCString GetFrameState(nsIFrame* aFrame);
1.104 +void PrintFrameState(nsIFrame* aFrame);
1.105 +#endif
1.106 +}
1.107 +
1.108 +#endif /* nsFrameState_h_ */
