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/. */ 5 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 */ 49 50 #ifndef GFX_SCRIPTITEMIZER_H 51 #define GFX_SCRIPTITEMIZER_H 52 53 #include <stdint.h> 54 #include "nsUnicodeScriptCodes.h" 55 56 #define PAREN_STACK_DEPTH 32 57 58 class gfxScriptItemizer 59 { 60 public: 61 typedef mozilla::unicode::Script Script; 62 63 gfxScriptItemizer(const char16_t *src, uint32_t length); 64 65 void SetText(const char16_t *src, uint32_t length); 66 67 bool Next(uint32_t& aRunStart, uint32_t& aRunLimit, 68 Script& aRunScript); 69 70 protected: 71 void reset() { 72 scriptStart = 0; 73 scriptLimit = 0; 74 scriptCode = Script::INVALID; 75 parenSP = -1; 76 pushCount = 0; 77 fixupCount = 0; 78 } 79 80 void push(uint32_t endPairChar, Script newScriptCode); 81 void pop(); 82 void fixup(Script newScriptCode); 83 84 struct ParenStackEntry { 85 uint32_t endPairChar; 86 Script scriptCode; 87 }; 88 89 const char16_t *textPtr; 90 uint32_t textLength; 91 92 uint32_t scriptStart; 93 uint32_t scriptLimit; 94 Script scriptCode; 95 96 struct ParenStackEntry parenStack[PAREN_STACK_DEPTH]; 97 uint32_t parenSP; 98 uint32_t pushCount; 99 uint32_t fixupCount; 100 }; 101 102 #endif /* GFX_SCRIPTITEMIZER_H */ 103