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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
/*
* This file is based on usc_impl.c from ICU 4.2.0.1, slightly adapted
* for use within Mozilla Gecko, separate from a standard ICU build.
*
* The original ICU license of the code follows:
*
* ICU License - ICU 1.8.1 and later
*
* COPYRIGHT AND PERMISSION NOTICE
*
* Copyright (c) 1995-2009 International Business Machines Corporation and
* others
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, provided that the above copyright notice(s) and this
* permission notice appear in all copies of the Software and that both the
* above copyright notice(s) and this permission notice appear in supporting
* documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE
* BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder shall
* not be used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization of the
* copyright holder.
*
* All trademarks and registered trademarks mentioned herein are the property
* of their respective owners.
*/
#ifndef GFX_SCRIPTITEMIZER_H
#define GFX_SCRIPTITEMIZER_H
#include <stdint.h>
#include "nsUnicodeScriptCodes.h"
#define PAREN_STACK_DEPTH 32
class gfxScriptItemizer
{
public:
typedef mozilla::unicode::Script Script;
gfxScriptItemizer(const char16_t *src, uint32_t length);
void SetText(const char16_t *src, uint32_t length);
bool Next(uint32_t& aRunStart, uint32_t& aRunLimit,
Script& aRunScript);
protected:
void reset() {
scriptStart = 0;
scriptLimit = 0;
scriptCode = Script::INVALID;
parenSP = -1;
pushCount = 0;
fixupCount = 0;
}
void push(uint32_t endPairChar, Script newScriptCode);
void pop();
void fixup(Script newScriptCode);
struct ParenStackEntry {
uint32_t endPairChar;
Script scriptCode;
};
const char16_t *textPtr;
uint32_t textLength;
uint32_t scriptStart;
uint32_t scriptLimit;
Script scriptCode;
struct ParenStackEntry parenStack[PAREN_STACK_DEPTH];
uint32_t parenSP;
uint32_t pushCount;
uint32_t fixupCount;
};
#endif /* GFX_SCRIPTITEMIZER_H */
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