michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* constants for frame state bits and a type to store them in a uint64_t */
michael@0: 
michael@0: #ifndef nsFrameState_h_
michael@0: #define nsFrameState_h_
michael@0: 
michael@0: #include <stdint.h>
michael@0: 
michael@0: #ifdef DEBUG
michael@0: #include "nsString.h"
michael@0: 
michael@0: class nsIFrame;
michael@0: #endif
michael@0: 
michael@0: typedef uint64_t nsFrameState_size_t;
michael@0: 
michael@0: #define NS_FRAME_STATE_BIT(n_) (nsFrameState(nsFrameState_size_t(1) << (n_)))
michael@0: 
michael@0: #if (_MSC_VER == 1600)
michael@0: /*
michael@0:  * Visual Studio 2010 has trouble with the sized enum.  Although sized enums
michael@0:  * are supported, two problems arise:
michael@0:  *
michael@0:  *   1. Implicit conversions from the enum type to the equivalently sized
michael@0:  *      integer size are not performed, leading to many compile errors.
michael@0:  *   2. Even with explicit casts added to avoid the errors from (1), odd
michael@0:  *      test failures result, which might well be due to a compiler bug.
michael@0:  *
michael@0:  * So with VS2010 we use consts for the state bits and forgo the increased
michael@0:  * type safety of the enum.  (Visual Studio 2012 has no problem with
michael@0:  * nsFrameState being a sized enum, however.)
michael@0:  */
michael@0: 
michael@0: typedef nsFrameState_size_t nsFrameState;
michael@0: 
michael@0: #define FRAME_STATE_BIT(group_, value_, name_) \
michael@0: const nsFrameState name_ = NS_FRAME_STATE_BIT(value_);
michael@0: #include "nsFrameStateBits.h"
michael@0: #undef FRAME_STATE_BIT
michael@0: 
michael@0: #else
michael@0: 
michael@0: enum nsFrameState : nsFrameState_size_t {
michael@0: #define FRAME_STATE_BIT(group_, value_, name_) \
michael@0:   name_ = NS_FRAME_STATE_BIT(value_),
michael@0: #include "nsFrameStateBits.h"
michael@0: #undef FRAME_STATE_BIT
michael@0: };
michael@0: 
michael@0: inline nsFrameState operator|(nsFrameState aLeft, nsFrameState aRight)
michael@0: {
michael@0:   return nsFrameState(nsFrameState_size_t(aLeft) | nsFrameState_size_t(aRight));
michael@0: }
michael@0: 
michael@0: inline nsFrameState operator&(nsFrameState aLeft, nsFrameState aRight)
michael@0: {
michael@0:   return nsFrameState(nsFrameState_size_t(aLeft) & nsFrameState_size_t(aRight));
michael@0: }
michael@0: 
michael@0: inline nsFrameState& operator|=(nsFrameState& aLeft, nsFrameState aRight)
michael@0: {
michael@0:   aLeft = aLeft | aRight;
michael@0:   return aLeft;
michael@0: }
michael@0: 
michael@0: inline nsFrameState& operator&=(nsFrameState& aLeft, nsFrameState aRight)
michael@0: {
michael@0:   aLeft = aLeft & aRight;
michael@0:   return aLeft;
michael@0: }
michael@0: 
michael@0: inline nsFrameState operator~(nsFrameState aRight)
michael@0: {
michael@0:   return nsFrameState(~nsFrameState_size_t(aRight));
michael@0: }
michael@0: 
michael@0: inline nsFrameState operator^(nsFrameState aLeft, nsFrameState aRight)
michael@0: {
michael@0:   return nsFrameState(nsFrameState_size_t(aLeft) ^ nsFrameState_size_t(aRight));
michael@0: }
michael@0: 
michael@0: inline nsFrameState& operator^=(nsFrameState& aLeft, nsFrameState aRight)
michael@0: {
michael@0:   aLeft = aLeft ^ aRight;
michael@0:   return aLeft;
michael@0: }
michael@0: 
michael@0: #endif
michael@0: 
michael@0: // Bits 20-31 and 60-63 of the frame state are reserved for implementations.
michael@0: #define NS_FRAME_IMPL_RESERVED                      nsFrameState(0xF0000000FFF00000)
michael@0: #define NS_FRAME_RESERVED                           ~NS_FRAME_IMPL_RESERVED
michael@0: 
michael@0: namespace mozilla {
michael@0: #ifdef DEBUG
michael@0: nsCString GetFrameState(nsIFrame* aFrame);
michael@0: void PrintFrameState(nsIFrame* aFrame);
michael@0: #endif
michael@0: }
michael@0: 
michael@0: #endif /* nsFrameState_h_ */