gecko-dev/layout/style/nsStyleStructFwd.h
Cameron McCormack dd8ce60c6d Bug 773296 - Part 3: Allow more than 27 style structs. r=dbaron
This bumps up nsStyleContext::mBits to a uint64_t so that it can fit
another style struct.  If we're going to need to keep at least 27 style
structs, it might be better to split mBits up into two uint32_ts: one
for the flags and one for the style struct bits.
2013-12-12 13:09:40 +11:00

68 lines
2.2 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Forward declarations to avoid including all of nsStyleStruct.h.
*/
#ifndef nsStyleStructFwd_h_
#define nsStyleStructFwd_h_
enum nsStyleStructID {
/*
* Define the constants eStyleStruct_Font, etc.
*
* The C++ standard, section 7.2, guarantees that enums begin with 0 and
* increase by 1.
*
* We separate the IDs of Reset and Inherited structs so that we can use
* the IDs as indices (offset by nsStyleStructID_*_Start) into arrays of
* one type or the other.
*/
nsStyleStructID_Inherited_Start = 0,
// a dummy value so the value after it is the same as ..._Inherited_Start
nsStyleStructID_DUMMY1 = nsStyleStructID_Inherited_Start - 1,
#define STYLE_STRUCT_INHERITED(name, checkdata_cb) \
eStyleStruct_##name,
#define STYLE_STRUCT_RESET(name, checkdata_cb)
#include "nsStyleStructList.h"
#undef STYLE_STRUCT_INHERITED
#undef STYLE_STRUCT_RESET
nsStyleStructID_Reset_Start,
// a dummy value so the value after it is the same as ..._Reset_Start
nsStyleStructID_DUMMY2 = nsStyleStructID_Reset_Start - 1,
#define STYLE_STRUCT_RESET(name, checkdata_cb) \
eStyleStruct_##name,
#define STYLE_STRUCT_INHERITED(name, checkdata_cb)
#include "nsStyleStructList.h"
#undef STYLE_STRUCT_INHERITED
#undef STYLE_STRUCT_RESET
// one past the end; length of 0-based list
nsStyleStructID_Length,
nsStyleStructID_Inherited_Count =
nsStyleStructID_Reset_Start - nsStyleStructID_Inherited_Start,
nsStyleStructID_Reset_Count =
nsStyleStructID_Length - nsStyleStructID_Reset_Start,
// An ID used for properties that are not in style structs. This is
// used only in some users of nsStyleStructID, such as
// nsCSSProps::kSIDTable, including some that store SIDs in a bitfield,
// such as nsCSSCompressedDataBlock::mStyleBits.
eStyleStruct_BackendOnly = nsStyleStructID_Length
};
// A bit corresponding to each struct ID
#define NS_STYLE_INHERIT_BIT(sid_) (1 << uint64_t(eStyleStruct_##sid_))
#endif /* nsStyleStructFwd_h_ */