The Tor Browser: layout/style/nsStyleStructFwd.h@8bccb770b82d

     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 /*

     7  * Forward declarations to avoid including all of nsStyleStruct.h.

     8  */

    10 #ifndef nsStyleStructFwd_h_

    11 #define nsStyleStructFwd_h_

    13 enum nsStyleStructID {

    15 /*

    16  * Define the constants eStyleStruct_Font, etc.

    17  *

    18  * The C++ standard, section 7.2, guarantees that enums begin with 0 and

    19  * increase by 1.

    20  *

    21  * We separate the IDs of Reset and Inherited structs so that we can use

    22  * the IDs as indices (offset by nsStyleStructID_*_Start) into arrays of

    23  * one type or the other.

    24  */

    26 nsStyleStructID_Inherited_Start = 0,

    27 // a dummy value so the value after it is the same as ..._Inherited_Start

    28 nsStyleStructID_DUMMY1 = nsStyleStructID_Inherited_Start - 1,

    30 #define STYLE_STRUCT_INHERITED(name, checkdata_cb) \

    31   eStyleStruct_##name,

    32 #define STYLE_STRUCT_RESET(name, checkdata_cb)

    33 #include "nsStyleStructList.h"

    34 #undef STYLE_STRUCT_INHERITED

    35 #undef STYLE_STRUCT_RESET

    37 nsStyleStructID_Reset_Start,

    38 // a dummy value so the value after it is the same as ..._Reset_Start

    39 nsStyleStructID_DUMMY2 = nsStyleStructID_Reset_Start - 1,

    41 #define STYLE_STRUCT_RESET(name, checkdata_cb) \

    42   eStyleStruct_##name,

    43 #define STYLE_STRUCT_INHERITED(name, checkdata_cb)

    44 #include "nsStyleStructList.h"

    45 #undef STYLE_STRUCT_INHERITED

    46 #undef STYLE_STRUCT_RESET

    48 // one past the end; length of 0-based list

    49 nsStyleStructID_Length,

    51 nsStyleStructID_Inherited_Count =

    52   nsStyleStructID_Reset_Start - nsStyleStructID_Inherited_Start,

    53 nsStyleStructID_Reset_Count =

    54   nsStyleStructID_Length - nsStyleStructID_Reset_Start,

    56 // An ID used for properties that are not in style structs.  This is

    57 // used only in some users of nsStyleStructID, such as

    58 // nsCSSProps::kSIDTable, including some that store SIDs in a bitfield,

    59 // such as nsCSSCompressedDataBlock::mStyleBits.

    60 eStyleStruct_BackendOnly = nsStyleStructID_Length

    62 };

    64 // A bit corresponding to each struct ID

    65 #define NS_STYLE_INHERIT_BIT(sid_)        (1 << uint64_t(eStyleStruct_##sid_))

    67 #endif /* nsStyleStructFwd_h_ */

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