The Tor Browser: gfx/thebes/gfxScriptItemizer.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     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  * This file is based on usc_impl.c from ICU 4.2.0.1, slightly adapted

     8  * for use within Mozilla Gecko, separate from a standard ICU build.

     9  *

    10  * The original ICU license of the code follows:

    11  *

    12  * ICU License - ICU 1.8.1 and later

    13  *

    14  * COPYRIGHT AND PERMISSION NOTICE

    15  *

    16  * Copyright (c) 1995-2009 International Business Machines Corporation and

    17  * others

    18  *

    19  * All rights reserved.

    20  *

    21  * Permission is hereby granted, free of charge, to any person obtaining a

    22  * copy of this software and associated documentation files (the "Software"),

    23  * to deal in the Software without restriction, including without limitation

    24  * the rights to use, copy, modify, merge, publish, distribute, and/or sell

    25  * copies of the Software, and to permit persons to whom the Software is

    26  * furnished to do so, provided that the above copyright notice(s) and this

    27  * permission notice appear in all copies of the Software and that both the

    28  * above copyright notice(s) and this permission notice appear in supporting

    29  * documentation.

    30  *

    31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

    32  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

    33  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.

    34  * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE

    35  * BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES,

    36  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

    37  * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,

    38  * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

    39  * SOFTWARE.

    40  *

    41  * Except as contained in this notice, the name of a copyright holder shall

    42  * not be used in advertising or otherwise to promote the sale, use or other

    43  * dealings in this Software without prior written authorization of the

    44  * copyright holder.

    45  *

    46  * All trademarks and registered trademarks mentioned herein are the property

    47  * of their respective owners.

    48  */

    50 #ifndef GFX_SCRIPTITEMIZER_H

    51 #define GFX_SCRIPTITEMIZER_H

    53 #include <stdint.h>

    54 #include "nsUnicodeScriptCodes.h"

    56 #define PAREN_STACK_DEPTH 32

    58 class gfxScriptItemizer

    59 {

    60 public:

    61     gfxScriptItemizer(const char16_t *src, uint32_t length);

    63     void SetText(const char16_t *src, uint32_t length);

    65     bool Next(uint32_t& aRunStart, uint32_t& aRunLimit,

    66               int32_t& aRunScript);

    68 protected:

    69     void reset() {

    70         scriptStart = 0;

    71         scriptLimit = 0;

    72         scriptCode  = MOZ_SCRIPT_INVALID;

    73         parenSP     = -1;

    74         pushCount   =  0;

    75         fixupCount  =  0;

    76     }

    78     void push(uint32_t endPairChar, int32_t scriptCode);

    79     void pop();

    80     void fixup(int32_t scriptCode);

    82     struct ParenStackEntry {

    83         uint32_t endPairChar;

    84         int32_t  scriptCode;

    85     };

    87     const char16_t *textPtr;

    88     uint32_t textLength;

    90     uint32_t scriptStart;

    91     uint32_t scriptLimit;

    92     int32_t  scriptCode;

    94     struct ParenStackEntry parenStack[PAREN_STACK_DEPTH];

    95     uint32_t parenSP;

    96     uint32_t pushCount;

    97     uint32_t fixupCount;

    98 };

   100 #endif /* GFX_SCRIPTITEMIZER_H */

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