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Diffstat (limited to '')
| -rw-r--r-- | basic/inc/sbxform.hxx | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/basic/inc/sbxform.hxx b/basic/inc/sbxform.hxx new file mode 100644 index 000000000..c14d950a8 --- /dev/null +++ b/basic/inc/sbxform.hxx @@ -0,0 +1,154 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * 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 incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#pragma once + + +// Implementation class for Basic command: Format$( d,formatStr ) + +/* + Grammar of format string (a try): + ----------------------------------------------- + + format_string := {\special_char} general_format | scientific_format {\special_char} {;format_string} + general_format := {#[,]}{0[,]}[.{0}{#}] + scientific_format := {0}[.{0}{#}](e | E)(+ | -){#}{0} + + percent_char := '%' + special_char := \char | + | - | ( | ) | $ | space_char + char := all_ascii_chars + space_char := ' ' + + {} repeated multiple times (incl. zero times) + [] exactly one or zero times + () parenthesis, e.g. (e | E) means e or E times + + Additional predefined formats for the format string: + "General Number" + "Currency" + "Fixed" + "Standard" + "Percent" + "Scientific" + "Yes/No" + "True/False" + "On/Off" + + Note: invalid format string are ignored just as in VisualBasic, the output is + probably 'undefined'. ASCII letters are outputted directly. + + Constraints in VisualBasic: + - the exponent (scientific syntax) has a maximum of three digits! + + Constraints of new implementation: + - the '+' sign is not allowed as wildcard in the mantissa + + TODO: + - Date formatting + Wildcards are: 'h', 'm', 's', 'y' + predefined String-Constants/Commands: + "AMPM", "Long Date", "Long Time" +*/ + +#include <rtl/ustring.hxx> +#include <rtl/ustrbuf.hxx> + +class SbxBasicFormater { + public: + // Constructor takes signs for decimal point, thousand separation sign + // and necessary resource strings. + SbxBasicFormater( sal_Unicode _cDecPoint, sal_Unicode _cThousandSep, + OUString _sOnStrg, + OUString _sOffStrg, + OUString _sYesStrg, + OUString _sNoStrg, + OUString _sTrueStrg, + OUString _sFalseStrg, + OUString _sCurrencyStrg, + OUString _sCurrencyFormatStrg ); + + /* Basic command: Format$( number,format-string ) + + Parameter: + dNumber : number to be formatted + sFormatStrg : the Format-String, e.g. ###0.0### + + Return value: + String containing the formatted output + */ + OUString BasicFormat( double dNumber, const OUString& sFormatStrg ); + static OUString BasicFormatNull( std::u16string_view sFormatStrg ); + + static bool isBasicFormat( std::u16string_view sFormatStrg ); + + private: + static inline void ShiftString( OUStringBuffer& sStrg, sal_uInt16 nStartPos ); + static void AppendDigit( OUStringBuffer& sStrg, short nDigit ); + void LeftShiftDecimalPoint( OUStringBuffer& sStrg ); + void StrRoundDigit( OUStringBuffer& sStrg, short nPos, bool& bOverflow ); + void StrRoundDigit( OUStringBuffer& sStrg, short nPos ); + static void ParseBack( OUStringBuffer& sStrg, std::u16string_view sFormatStrg, + short nFormatPos ); + // Methods for string conversion with sprintf(): + void InitScan( double _dNum ); + void InitExp( double _dNewExp ); + short GetDigitAtPosScan( short nPos, bool& bFoundFirstDigit ); + short GetDigitAtPosExpScan( double dNewExponent, short nPos, + bool& bFoundFirstDigit ); + short GetDigitAtPosExpScan( short nPos, bool& bFoundFirstDigit ); + static OUString GetPosFormatString( std::u16string_view sFormatStrg, bool & bFound ); + static OUString GetNegFormatString( std::u16string_view sFormatStrg, bool & bFound ); + static OUString Get0FormatString( std::u16string_view sFormatStrg, bool & bFound ); + static OUString GetNullFormatString( std::u16string_view sFormatStrg, bool & bFound ); + static void AnalyseFormatString( const OUString& sFormatStrg, + short& nNoOfDigitsLeft, short& nNoOfDigitsRight, + short& nNoOfOptionalDigitsLeft, + short& nNoOfExponentDigits, + short& nNoOfOptionalExponentDigits, + bool& bPercent, bool& bCurrency, bool& bScientific, + bool& bGenerateThousandSeparator, + short& nMultipleThousandSeparators ); + void ScanFormatString( double dNumber, const OUString& sFormatStrg, + OUString& sReturnStrg, bool bCreateSign ); + + //*** Data *** + sal_Unicode cDecPoint; // sign for the decimal point + sal_Unicode cThousandSep; // sign for thousand delimiter + // Text for output: + OUString sOnStrg; + OUString sOffStrg; + OUString sYesStrg; + OUString sNoStrg; + OUString sTrueStrg; + OUString sFalseStrg; + OUString sCurrencyStrg; + OUString sCurrencyFormatStrg; + + //*** temporary data for scan loop *** + + // String containing the number in scientific format + OUString sSciNumStrg; + // String containing the exponent of the number + OUString sNumExpStrg; + double dNum; // the number that is scanned + short nNumExp; // the exponent of the number + short nExpExp; // the number of digits in the exponent +}; + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |