1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ 2 /* 3 * This file is part of the LibreOffice project. 4 * 5 * This Source Code Form is subject to the terms of the Mozilla Public 6 * License, v. 2.0. If a copy of the MPL was not distributed with this 7 * file, You can obtain one at http://mozilla.org/MPL/2.0/. 8 * 9 * This file incorporates work covered by the following license notice: 10 * 11 * Licensed to the Apache Software Foundation (ASF) under one or more 12 * contributor license agreements. See the NOTICE file distributed 13 * with this work for additional information regarding copyright 14 * ownership. The ASF licenses this file to you under the Apache 15 * License, Version 2.0 (the "License"); you may not use this file 16 * except in compliance with the License. You may obtain a copy of 17 * the License at http://www.apache.org/licenses/LICENSE-2.0 . 18 */ 19 #ifndef INCLUDED_I18NUTIL_UNICODE_HXX 20 #define INCLUDED_I18NUTIL_UNICODE_HXX 21 22 #include <com/sun/star/i18n/UnicodeScript.hpp> 23 #include <sal/types.h> 24 #include <rtl/ustrbuf.hxx> 25 #include <unicode/uscript.h> 26 #include <i18nutil/i18nutildllapi.h> 27 28 class LanguageTag; 29 30 struct ScriptTypeList 31 { 32 css::i18n::UnicodeScript from; 33 css::i18n::UnicodeScript to; 34 sal_Int16 value; 35 }; 36 37 class I18NUTIL_DLLPUBLIC unicode 38 { 39 public: 40 static sal_Int16 getUnicodeType(const sal_Unicode ch); 41 static sal_Int16 getUnicodeScriptType(const sal_Unicode ch, const ScriptTypeList* typeList, 42 sal_Int16 unknownType = 0); 43 static sal_Unicode getUnicodeScriptStart(css::i18n::UnicodeScript type); 44 static sal_Unicode getUnicodeScriptEnd(css::i18n::UnicodeScript type); 45 static sal_uInt8 getUnicodeDirection(const sal_Unicode ch); 46 static bool isControl(const sal_Unicode ch); 47 static bool isAlpha(const sal_Unicode ch); 48 static bool isSpace(const sal_Unicode ch); 49 static bool isWhiteSpace(const sal_Unicode ch); 50 51 /** Check for Unicode variation sequence selectors 52 53 @param nCode A Unicode code point. 54 55 @return True if code is a Unicode variation sequence selector. 56 */ isIVSSelector(sal_uInt32 nCode)57 static bool isIVSSelector(sal_uInt32 nCode) 58 { 59 return (nCode >= 0xFE00 && nCode <= 0xFE0F) // Variation Selectors block 60 || (nCode >= 0xE0100 && nCode <= 0xE01EF); // Variation Selectors Supplement block 61 } 62 63 /** Check for base characters of a CJK ideographic variation sequence (IVS) 64 65 @param nCode A Unicode code point. 66 67 @return True if code is a Unicode base character part of CJK IVS 68 */ isCJKIVSCharacter(sal_uInt32 nCode)69 static bool isCJKIVSCharacter(sal_uInt32 nCode) 70 { 71 return (nCode >= 0x4E00 && nCode <= 0x9FFF) // CJK Unified Ideographs 72 || (nCode >= 0x3400 && nCode <= 0x4DBF) // CJK Unified Ideographs Extension A 73 || (nCode >= 0x20000 && nCode <= 0x2A6DF); // CJK Unified Ideographs Extension B 74 } 75 76 //Map an ISO 15924 script code to Latin/Asian/Complex/Weak 77 static sal_Int16 getScriptClassFromUScriptCode(UScriptCode eScript); 78 79 //Return a language that can be written in a given ISO 15924 script code 80 static OString getExemplarLanguageForUScriptCode(UScriptCode eScript); 81 82 //Format a number as a percentage according to the rules of the given 83 //language, e.g. 100 -> "100%" for en-US vs "100 %" for de-DE 84 static OUString formatPercent(double dNumber, const LanguageTag& rLangTag); 85 }; 86 87 /* 88 Toggle between a character and its Unicode Notation. 89 -implements the concept found in Microsoft Word's Alt-X 90 -accepts sequences of up to 8 hex characters and converts into the corresponding Unicode Character 91 -example: 0000A78c or 2bc 92 -accepts sequences of up to 256 characters in Unicode notation 93 -example: U+00000065u+0331u+308 94 -handles complex characters (with combining elements) and the all of the Unicode planes. 95 */ 96 class I18NUTIL_DLLPUBLIC ToggleUnicodeCodepoint 97 { 98 private: 99 OUStringBuffer maInput; 100 OUStringBuffer maUtf16; 101 OUStringBuffer maCombining; 102 bool mbAllowMoreChars = true; 103 bool mbRequiresU = false; 104 bool mbIsHexString = false; 105 106 public: 107 /** 108 Build an input string of valid UTF16 units to toggle. 109 -do not call the other functions until the input process is complete 110 -build string from Right to Left. (Start from the character to the left of the cursor: move left.) 111 */ 112 bool AllowMoreInput(sal_Unicode uChar); 113 114 /** 115 Validates (and potentially modifies) the input string. 116 -all non-input functions must use this function to first to validate the input string 117 -additional input may be prevented after this function is called 118 */ 119 OUString StringToReplace(); 120 OUString ReplacementString(); 121 122 /** 123 While sInput.getLength() returns the number of utf16 units to delete, 124 this function returns the number of "characters" to delete - potentially a smaller number 125 */ 126 sal_uInt32 CharsToDelete(); 127 }; 128 129 #endif 130 131 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ 132