зеркало из https://github.com/mozilla/gecko-dev.git
131 строка
4.8 KiB
C++
131 строка
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Corporation code.
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*
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* The Initial Developer of the Original Code is Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jonathan Kew <jfkthame@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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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 "prtypes.h"
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#include "harfbuzz/hb.h"
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#define PAREN_STACK_DEPTH 32
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class gfxScriptItemizer
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{
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public:
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gfxScriptItemizer(const PRUnichar *src, PRUint32 length);
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void SetText(const PRUnichar *src, PRUint32 length);
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PRBool Next(PRUint32& aRunStart, PRUint32& aRunLimit,
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PRInt32& 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 = PRInt32(HB_SCRIPT_INVALID_CODE);
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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(PRInt32 pairIndex, PRInt32 scriptCode);
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void pop();
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void fixup(PRInt32 scriptCode);
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struct ParenStackEntry {
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PRInt32 pairIndex;
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PRInt32 scriptCode;
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};
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const PRUnichar *textPtr;
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PRUint32 textLength;
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PRUint32 scriptStart;
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PRUint32 scriptLimit;
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PRInt32 scriptCode;
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struct ParenStackEntry parenStack[PAREN_STACK_DEPTH];
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PRUint32 parenSP;
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PRUint32 pushCount;
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PRUint32 fixupCount;
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};
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#endif /* GFX_SCRIPTITEMIZER_H */
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