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CustomExpression.h
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115 lines (96 loc) · 4.13 KB
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/**************************************************************************************
* File name: Expression.h
*
* Project: MapWindow Open Source (MapWinGis ActiveX control)
* Description: Declaration of CExpression
*
**************************************************************************************
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/mpl/
* See the License for the specific language governing rights and limitations
* under the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
**************************************************************************************
* Contributor(s):
* (Open source contributors should list themselves and their modifications here). */
#pragma once
#include "ExpressionParts.h"
class CustomExpression
{
private:
public:
CustomExpression()
: _useFields(true), _saveOperations(true), _floatFormat(m_globalSettings.floatNumberFormat),
_shape(NULL), _errorPosition(-1)
{
}
~CustomExpression()
{
Clear();
}
private:
std::vector<CExpressionPart*> _parts;
std::vector<CElement*> _variables;
std::vector<CStringW> _fields;
std::vector<COperation*> _operations;
std::vector<CStringW> _strings;
bool _useFields;
bool _saveOperations;
CStringW _errorMessage; // the description of error
int _errorPosition; // the position of error
CString _floatFormat;
IShape* _shape;
private:
// calculation of expression
bool FindOperation(CExpressionPart* part, COperation& operation);
bool CalculateOperation(CExpressionPart* part, COperation& operation);
inline CExpressionValue* GetValue(CExpressionPart* part, int elementId);
bool EvaluateFunction(CExpressionPart* part);
void EvaluatePart();
bool EvaluatePart(CExpressionPart* part, CStringW& errorMessage, int& operationCount);
bool FinishPart(CExpressionPart* part);
bool CalculateNextOperationWithinPart(CExpressionPart* part, CStringW& errorMessage, int& operationCount);
void SetFieldValues(ITable* tbl);
void BuildFieldList();
void ResetActiveCountForParts();
void Reset();
TwoArgOperator GetMatrixOperation(tkOperation op);
public:
bool IsEmpty() { return _parts.size() == 0; }
bool Parse(CStringW s, bool useFields, CStringW& error);
CExpressionValue* Calculate(CStringW& errorMessage);
void Clear();
void ReleaseArrays();
bool ReadFieldNames(ITable* tbl);
void SetFields(vector<CStringW>& fields);
void AddPart(CExpressionPart* part) { _parts.push_back(part); }
CString GetFloatFormat() { return _floatFormat; }
void SetFloatFormat(CString value) { _floatFormat = value; }
bool GetUseFields() { return _useFields; }
vector<CStringW>* GetStrings() { return &_strings; }
vector<CStringW>* GetFields() { return &_fields; }
// variable fields
int get_NumFields() { return _variables.size(); }
int get_FieldIndex(int FieldId) { return _variables[FieldId]->fieldIndex; }
CStringW get_FieldName(int FieldId) { return _variables[FieldId]->fieldName; }
CExpressionValue* get_FieldValue(int FieldId) { return _variables[FieldId]->val;}
void put_FieldValue(int FieldId, double newVal) { _variables[FieldId]->val->dbl(newVal); }
void put_FieldValue(int FieldId, BSTR newVal);
void put_FieldValue(int FieldId, CStringW newVal);
void put_FieldValue(int FieldId, bool newVal) { _variables[FieldId]->val->bln(newVal);}
int get_PartCount() { return _parts.size(); }
IShape* get_Shape();
void put_Shape(IShape* shape);
void SetErrorMessage(CStringW msg) { _errorMessage = msg; }
void SetErrorPosition(int position){ _errorPosition = position; }
void ClearOperations();
void CacheOperation(COperation& operation);
};