/* -*- 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 */