/***************************************************************************
 *   Copyright (c) Jürgen Riegel          (juergen.riegel@web.de) 2002     *
 *                                                                         *
 *   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                                *
 *                                                                         *
 ***************************************************************************/

#include "PreCompiled.h"
#ifndef _PreComp_
# include <sstream>
# include <TopoDS_Shape.hxx>
#endif

#include <Mod/Part/App/PartFeature.h>

#include "FeatureViewPart.h"
#include "ProjectionAlgos.h"


using namespace Drawing;
using namespace std;

//===========================================================================
// FeatureViewPart
//===========================================================================

App::PropertyFloatConstraint::Constraints FeatureViewPart::floatRange = {0.01, 5.0, 0.05};

PROPERTY_SOURCE(Drawing::FeatureViewPart, Drawing::FeatureView)


FeatureViewPart::FeatureViewPart(void) 
{
    static const char *group = "Shape view";
    static const char *vgroup = "Drawing view";

    ADD_PROPERTY_TYPE(Direction ,(0,0,1.0),group,App::Prop_None,"Projection direction");
    ADD_PROPERTY_TYPE(Source ,(nullptr),group,App::Prop_None,"Shape to view");
    ADD_PROPERTY_TYPE(ShowHiddenLines ,(false),group,App::Prop_None,"Control the appearance of the dashed hidden lines");
    ADD_PROPERTY_TYPE(ShowSmoothLines ,(false),group,App::Prop_None,"Control the appearance of the smooth lines");
    ADD_PROPERTY_TYPE(LineWidth,(0.35),vgroup,App::Prop_None,"The thickness of the viewed lines");
    ADD_PROPERTY_TYPE(HiddenWidth,(0.15),vgroup,App::Prop_None,"The thickness of the hidden lines, if enabled");
    ADD_PROPERTY_TYPE(Tolerance,(0.05),vgroup,App::Prop_None,"The tessellation tolerance");
    Tolerance.setConstraints(&floatRange);
}

FeatureViewPart::~FeatureViewPart()
{
}

App::DocumentObjectExecReturn *FeatureViewPart::execute(void)
{
    std::stringstream result;
    std::string ViewName = Label.getValue();

    App::DocumentObject* link = Source.getValue();
    if (!link)
        return new App::DocumentObjectExecReturn("No object linked");
    if (!link->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
        return new App::DocumentObjectExecReturn("Linked object is not a Part object");
    TopoDS_Shape shape = static_cast<Part::Feature*>(link)->Shape.getShape().getShape();
    if (shape.IsNull())
        return new App::DocumentObjectExecReturn("Linked shape object is empty");
    Base::Vector3d Dir = Direction.getValue();
    bool hidden = ShowHiddenLines.getValue();
    bool smooth = ShowSmoothLines.getValue();

    try {
        ProjectionAlgos Alg(shape,Dir);
        result  << "<g" 
                << " id=\"" << ViewName << "\"" << endl
                << "   transform=\"rotate("<< Rotation.getValue() << ","<< X.getValue()<<","<<Y.getValue()<<") translate("<< X.getValue()<<","<<Y.getValue()<<") scale("<< Scale.getValue()<<","<<Scale.getValue()<<")\"" << endl
                << "  >" << endl;

        ProjectionAlgos::ExtractionType type = ProjectionAlgos::Plain;
        if (hidden) type = (ProjectionAlgos::ExtractionType)(type|ProjectionAlgos::WithHidden);
        if (smooth) type = (ProjectionAlgos::ExtractionType)(type|ProjectionAlgos::WithSmooth);
        ProjectionAlgos::XmlAttributes visible_style = {
          {"stroke-width", to_string(this->LineWidth.getValue() / this->Scale.getValue())}
        };
        ProjectionAlgos::XmlAttributes hidden_style = {
          {"stroke-width", to_string(this->HiddenWidth.getValue() / this->Scale.getValue()) }
        };
        result << Alg.getSVG(type, this->Tolerance.getValue(), visible_style, visible_style, visible_style, hidden_style, hidden_style, hidden_style);

        result << "</g>" << endl;

        // Apply the resulting fragment
        ViewResult.setValue(result.str().c_str());

        return App::DocumentObject::StdReturn;
    }
    catch (Standard_Failure& e) {
        return new App::DocumentObjectExecReturn(e.GetMessageString());
    }
}



// Python Drawing feature ---------------------------------------------------------

namespace App {
/// @cond DOXERR
PROPERTY_SOURCE_TEMPLATE(Drawing::FeatureViewPartPython, Drawing::FeatureViewPart)
template<> const char* Drawing::FeatureViewPartPython::getViewProviderName(void) const {
    return "DrawingGui::ViewProviderDrawingView";
}
/// @endcond

// explicit template instantiation
template class DrawingExport FeaturePythonT<Drawing::FeatureViewPart>;
}