SelectionFilter.h

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/***************************************************************************
 *   Copyright (c) 2009 Juergen Riegel  (FreeCAD@juergen-riegel.net>       *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   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, or (at your option) any later version.      *
 *                                                                         *
 *   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., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#ifndef GUI_SelectionFilter_H
#define GUI_SelectionFilter_H

#include <string>
#include <CXX/Extensions.hxx>
#include "Selection.h"

namespace App {
    class DocumentObject;
}

namespace Gui {
    struct Node_Block;
    

class GuiExport SelectionFilter 
{

public:
    SelectionFilter(const char* filter);
    SelectionFilter(const std::string& filter);
    virtual ~SelectionFilter();

    void setFilter(const char* filter);
    bool match(void);
    bool test(App::DocumentObject*pObj, const char*sSubName);

    void addError(const char* e);
 
    friend class SelectionSingleton;

    std::vector<std::vector<SelectionObject> > Result;

    bool isValid(void) const {return Ast;}

protected:
    std::string Filter;
    std::string Errors;
    bool parse(void);

    Node_Block *Ast;

};

class GuiExport SelectionFilterGate: public SelectionGate
{
public:
    SelectionFilterGate(const char* filter);
    SelectionFilterGate(SelectionFilter* filter);
    ~SelectionFilterGate();
    virtual bool allow(App::Document*,App::DocumentObject*, const char*);

protected:
    SelectionFilter *Filter;
};

class SelectionFilterPy : public Py::PythonExtension<SelectionFilterPy> 
{
private:
    SelectionFilter filter;

public:
    static void init_type(void);    // announce properties and methods

    SelectionFilterPy(const std::string&);
    ~SelectionFilterPy();

    Py::Object repr();
    Py::Object match(const Py::Tuple&);
    Py::Object result(const Py::Tuple&);
    Py::Object test(const Py::Tuple&);

private:
    static PyObject *PyMake(struct _typeobject *, PyObject *, PyObject *);
};

// === Abstract syntax tree (AST) ===========================================

struct Node_Slice 
{
    Node_Slice(int min=1,int max=INT_MAX):Min(min),Max(max){}
    int Min,Max;

};


struct Node_Object 
{
    Node_Object(std::string *type,std::string *subname,Node_Slice* slc )
        :Slice(slc)
    {
        ObjectType = Base::Type::fromName(type->c_str());
        delete (type);
        if(subname){
            SubName = *subname;
            delete subname;
        }
    }
    ~Node_Object(){
        delete Slice;
    }
    Base::Type ObjectType;
    Node_Slice  *Slice;
    std::string SubName;
};

struct Node_Block 
{
    Node_Block(Node_Object* obj){Objects.push_back(obj);}
    std::vector< Node_Object *> Objects;
};


} // namespace Gui


#endif // GUI_SelectionFilter_H