You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
351 lines
8.7 KiB
351 lines
8.7 KiB
/* This file is part of the KDE project
|
|
Copyright (C) 2003,2004 Ariya Hidayat <ariya@kde.org>
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with this library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef KSPREAD_FORMULA
|
|
#define KSPREAD_FORMULA
|
|
|
|
#include <tqstring.h>
|
|
#include <tqvaluevector.h>
|
|
|
|
class TDELocale;
|
|
|
|
namespace KSpread
|
|
{
|
|
class Cell;
|
|
class Sheet;
|
|
class Value;
|
|
|
|
/**
|
|
* Token
|
|
*/
|
|
class Token
|
|
{
|
|
public:
|
|
/**
|
|
* token types
|
|
*/
|
|
enum Type
|
|
{
|
|
Unknown = 0, ///< unknown type
|
|
Boolean, ///< True, False (also i18n-ized)
|
|
Integer, ///< 14, 3, 1977
|
|
Float, ///< 3.141592, 1e10, 5.9e-7
|
|
String, ///< "KOffice", "The quick brown fox..."
|
|
Operator, ///< +, *, /, -
|
|
Cell, ///< $A$1, F4, Sheet2!B5, 'Sales Forecast'!Sum
|
|
Range, ///< C1:C100
|
|
Identifier ///< function name or named area
|
|
};
|
|
|
|
/**
|
|
* operator types
|
|
*/
|
|
enum Op
|
|
{
|
|
InvalidOp = 0, ///< invalid operator
|
|
Plus, ///< + (addition)
|
|
Minus, ///< - (substraction, negation)
|
|
Asterisk, ///< * (multiplication)
|
|
Slash, ///< / (division)
|
|
Caret, ///< ^ (power)
|
|
LeftPar, ///< (
|
|
RightPar, ///< )
|
|
Comma, ///< ,
|
|
Semicolon, ///< ; (argument separator)
|
|
Ampersand, ///< & (string concat)
|
|
Equal, ///< =
|
|
NotEqual, ///< <>
|
|
Less, ///< <
|
|
Greater, ///< >
|
|
LessEqual, ///< <=
|
|
GreaterEqual, ///< >=
|
|
Percent ///< %
|
|
};
|
|
|
|
/**
|
|
* Creates a token.
|
|
*/
|
|
Token( Type type = Unknown, const TQString& text = TQString(), int pos = -1 );
|
|
|
|
static const Token null;
|
|
|
|
Token( const Token& );
|
|
Token& operator=( const Token& );
|
|
|
|
/**
|
|
* Returns type of the token.
|
|
*/
|
|
Type type() const { return m_type; }
|
|
|
|
/**
|
|
* Returns text associated with the token.
|
|
*
|
|
* If you want to obtain meaningful value of this token, instead of
|
|
* text(), you might use asInteger(), asFloat(), asString(), sheetName(),
|
|
* etc.
|
|
*/
|
|
TQString text() const { return m_text; }
|
|
|
|
int pos() const { return m_pos; };
|
|
|
|
/**
|
|
* Returns true if token is a boolean token.
|
|
*/
|
|
bool isBoolean() const { return m_type == Boolean; }
|
|
|
|
/**
|
|
* Returns true if token is a integer token.
|
|
*/
|
|
bool isInteger() const { return m_type == Integer; }
|
|
|
|
/**
|
|
* Returns true if token is a floating-point token.
|
|
*/
|
|
bool isFloat() const { return m_type == Float; }
|
|
|
|
/**
|
|
* Returns true if token is either integer or floating-point token.
|
|
*/
|
|
bool isNumber() const { return (m_type == Integer) || (m_type == Float); }
|
|
|
|
/**
|
|
* Returns true if token is a string token.
|
|
*/
|
|
bool isString() const { return m_type == String; }
|
|
|
|
/**
|
|
* Returns true if token is an operator token.
|
|
*/
|
|
bool isOperator() const { return m_type == Operator; }
|
|
|
|
/**
|
|
* Returns true if token is a cell reference token.
|
|
*/
|
|
bool isCell() const { return m_type == Cell; }
|
|
|
|
/**
|
|
* Returns true if token is a range reference token.
|
|
*/
|
|
bool isRange() const { return m_type == Range; }
|
|
|
|
/**
|
|
* Returns true if token is an identifier.
|
|
*/
|
|
bool isIdentifier() const { return m_type == Identifier; }
|
|
|
|
/**
|
|
* Returns boolean value for an boolean token.
|
|
* For any other type of token, return value is undefined.
|
|
*/
|
|
bool asBoolean() const;
|
|
|
|
/**
|
|
* Returns integer value for an integer token.
|
|
* For any other type of token, returns 0.
|
|
*/
|
|
long asInteger() const;
|
|
|
|
/**
|
|
* Returns floating-point value for a floating-point token.
|
|
* For any other type of token, returns 0.0.
|
|
*/
|
|
double asFloat() const;
|
|
|
|
/**
|
|
* Returns string value for a string token.
|
|
* For any other type of token, it returns TQString().
|
|
*
|
|
* Note that token text for a string token still has leading and trailing
|
|
* double-quotes, i.e for "KOffice", text() return "KOffice"
|
|
* (with the quotes, 9 characters) while asString() only return KOffice
|
|
* (without quotes, 7 characters).
|
|
*/
|
|
TQString asString() const;
|
|
|
|
/**
|
|
* Returns operator value for an operator token.
|
|
* For any other type of token, returns Token::InvalidOp.
|
|
*/
|
|
Op asOperator() const;
|
|
|
|
/**
|
|
* Returns sheet name in a cell reference token.
|
|
* For any other type of token, it returns TQString().
|
|
*
|
|
* If the cell reference doesn't specify sheet name, an empty string
|
|
* is returned. As example, for "Sheet1!B3" , sheetName() returns
|
|
* "Sheet1" while for "A2" sheetName() returns "".
|
|
*
|
|
* When sheet name contains quotes (as if the name has spaces) like
|
|
* in "'Sales Forecast'!F4", sheetName() returns the name
|
|
* without the quotes, i.e "Sales Forecast" in this case.
|
|
*/
|
|
TQString sheetName() const;
|
|
|
|
/**
|
|
* Returns a short description of the token.
|
|
* Should be used only to assist debugging.
|
|
*/
|
|
TQString description() const;
|
|
|
|
protected:
|
|
|
|
Type m_type;
|
|
TQString m_text;
|
|
int m_pos;
|
|
|
|
};
|
|
|
|
/**
|
|
* Class Tokens represents array of tokens.
|
|
*
|
|
*/
|
|
class Tokens: public TQValueVector<Token>
|
|
{
|
|
public:
|
|
Tokens(): TQValueVector<Token>(), m_valid(true) {};
|
|
bool valid() const { return m_valid; }
|
|
void setValid( bool v ){ m_valid = v; }
|
|
protected:
|
|
bool m_valid;
|
|
};
|
|
|
|
|
|
/**
|
|
* Class Formula encapsulates a formula for a cell.
|
|
*
|
|
* A Formula is a equations which perform calculations on values in the cells
|
|
* and sheets. Every formula must start with an equal sign (=).
|
|
*
|
|
*
|
|
*/
|
|
class Formula
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Creates a formula. It must be owned by a sheet, and optionally sheet.
|
|
*/
|
|
Formula (Sheet *sheet, Cell *cell = 0);
|
|
|
|
/**
|
|
* Creates a formula that is not owned by any sheet.
|
|
* This might be useful in some cases.
|
|
*/
|
|
Formula();
|
|
|
|
/**
|
|
* Destroys the formula.
|
|
*/
|
|
~Formula();
|
|
|
|
/**
|
|
* Returns the cell which owns this formula.
|
|
*/
|
|
Sheet* sheet() const;
|
|
/**
|
|
* Returns the cell which owns this formula.
|
|
*/
|
|
Cell* cell() const;
|
|
|
|
/**
|
|
* Sets the expression for this formula.
|
|
*/
|
|
void setExpression( const TQString& expr );
|
|
|
|
/**
|
|
* Gets the expression of this formula.
|
|
*/
|
|
TQString expression() const;
|
|
|
|
/**
|
|
* Clears everything, makes as like a newly constructed formula.
|
|
*/
|
|
void clear();
|
|
|
|
/**
|
|
* Returns true if the specified expression is valid, i.e. it contains
|
|
* no parsing error.
|
|
* Empty formula (i.e. without expression) is always invalid.
|
|
*/
|
|
bool isValid() const;
|
|
|
|
/**
|
|
* Returns list of tokens associated with this formula. This has nothing to
|
|
* with the formula evaluation but might be useful, e.g. for syntax
|
|
* highlight or similar features.
|
|
* If the formula contains error, the returned tokens is invalid.
|
|
*/
|
|
Tokens tokens() const;
|
|
|
|
/**
|
|
* Evaluates the formula and returns the result.
|
|
*/
|
|
Value eval() const;
|
|
|
|
/**
|
|
* Given an expression, this function separates it into tokens.
|
|
* If the expression contains error (e.g. unknown operator, string no terminated)
|
|
* this function returns tokens which is not valid.
|
|
*/
|
|
Tokens scan( const TQString& expr, TDELocale* locale = 0 ) const;
|
|
|
|
TQString dump() const;
|
|
|
|
protected:
|
|
|
|
void compile( const Tokens& tokens ) const;
|
|
|
|
/**
|
|
* helper function: return true for valid named area
|
|
*/
|
|
bool isNamedArea( const TQString& expr ) const;
|
|
|
|
private:
|
|
class Private;
|
|
Private *d;
|
|
// no copy or assign
|
|
Formula( const Formula& );
|
|
Formula& operator=( const Formula& );
|
|
};
|
|
|
|
/**
|
|
* Dumps the formula, should be used only to assist debugging.
|
|
*/
|
|
TQTextStream& operator<<( TQTextStream& ts, Formula formula );
|
|
|
|
|
|
/**
|
|
* helper function: return operator of given token text
|
|
* e.g. "*" yields Operator::Asterisk, and so on
|
|
*/
|
|
Token::Op matchOperator( const TQString& text );
|
|
|
|
/**
|
|
* helper function: return true for valid identifier character
|
|
*/
|
|
bool isIdentifier( TQChar ch );
|
|
|
|
} // namespace KSpread
|
|
|
|
|
|
|
|
#endif // KSPREAD_FORMULA
|
|
|