mirror of
https://github.com/mozilla/gecko-dev.git
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100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* This file is based on usc_impl.c from ICU 4.2.0.1, slightly adapted
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* for use within Mozilla Gecko, separate from a standard ICU build.
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*
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* The original ICU license of the code follows:
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*
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* ICU License - ICU 1.8.1 and later
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*
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* COPYRIGHT AND PERMISSION NOTICE
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*
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* Copyright (c) 1995-2009 International Business Machines Corporation and
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* others
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*
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, provided that the above copyright notice(s) and this
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* permission notice appear in all copies of the Software and that both the
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* above copyright notice(s) and this permission notice appear in supporting
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* documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE
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* BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of a copyright holder shall
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* not be used in advertising or otherwise to promote the sale, use or other
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* dealings in this Software without prior written authorization of the
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* copyright holder.
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*
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* All trademarks and registered trademarks mentioned herein are the property
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* of their respective owners.
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*/
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#ifndef GFX_SCRIPTITEMIZER_H
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#define GFX_SCRIPTITEMIZER_H
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#include <stdint.h>
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#include "mozilla/intl/UnicodeScriptCodes.h"
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#define PAREN_STACK_DEPTH 32
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class gfxScriptItemizer {
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public:
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typedef mozilla::intl::Script Script;
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gfxScriptItemizer(const char16_t* src, uint32_t length);
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void SetText(const char16_t* src, uint32_t length);
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bool Next(uint32_t& aRunStart, uint32_t& aRunLimit, Script& aRunScript);
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protected:
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void reset() {
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scriptStart = 0;
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scriptLimit = 0;
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scriptCode = Script::INVALID;
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parenSP = -1;
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pushCount = 0;
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fixupCount = 0;
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}
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void push(uint32_t endPairChar, Script newScriptCode);
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void pop();
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void fixup(Script newScriptCode);
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struct ParenStackEntry {
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uint32_t endPairChar;
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Script scriptCode;
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};
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const char16_t* textPtr;
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uint32_t textLength;
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uint32_t scriptStart;
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uint32_t scriptLimit;
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Script scriptCode;
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struct ParenStackEntry parenStack[PAREN_STACK_DEPTH];
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uint32_t parenSP;
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uint32_t pushCount;
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uint32_t fixupCount;
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};
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#endif /* GFX_SCRIPTITEMIZER_H */
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