AtomicGameEngine/Source/ToolCore/JSBind/CSharp/CSClassWriter.cpp

//
// Copyright (c) 2014-2016 THUNDERBEAST GAMES LLC
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// 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.
//

#include <Atomic/IO/FileSystem.h>

#include "../JSBind.h"
#include "../JSBModule.h"
#include "../JSBPackage.h"
#include "../JSBEnum.h"
#include "../JSBClass.h"
#include "../JSBFunction.h"

#include "CSTypeHelper.h"
#include "CSClassWriter.h"
#include "CSFunctionWriter.h"

namespace ToolCore
{

CSClassWriter::CSClassWriter(JSBClass *klass) : JSBClassWriter(klass)
{

}

void CSClassWriter::WriteNativeFunctions(String& source)
{
    for (unsigned i = 0; i < klass_->functions_.Size(); i++)
    {
        JSBFunction* function = klass_->functions_.At(i);

        if (function->Skip())
            continue;

        if (klass_->IsInterface() && function->IsConstructor())
            continue;

        if (function->IsDestructor())
            continue;

        if (CSTypeHelper::OmitFunction(function))
            continue;

        CSFunctionWriter writer(function);
        writer.GenerateNativeSource(source);
    }

}

void CSClassWriter::GenerateNativeSource(String& sourceOut)
{
    String source = "";

    if (klass_->IsNumberArray())
        return;

    JSBPackage* package = klass_->GetPackage();

    if (!klass_->IsInterface())
    {
        source.AppendWithFormat("ATOMIC_EXPORT_API ClassID csb_%s_%s_GetClassIDStatic()\n{\n", package->GetName().CString(), klass_->GetName().CString());
        source.AppendWithFormat("   return %s::GetClassIDStatic();\n}\n\n", klass_->GetNativeName().CString());
    }

    WriteNativeFunctions(source);

    sourceOut += source;
}

void CSClassWriter::WriteManagedProperties(String& sourceOut)
{
    String source;

    if (klass_->HasProperties())
    {
        Vector<String> pnames;
        klass_->GetPropertyNames(pnames);

        for (unsigned j = 0; j < pnames.Size(); j++)
        {
            JSBProperty* prop = klass_->GetProperty(pnames[j]);

            JSBFunctionType* fType = NULL;
            JSBFunctionType* getType = NULL;
            JSBFunctionType* setType = NULL;

            if (CSTypeHelper::OmitFunction(prop->getter_) || CSTypeHelper::OmitFunction(prop->setter_))
                continue;

            if (klass_->IsInterface())
            {
                if ((prop->getter_ && prop->getter_->IsInheritedInterface()) ||
                    (prop->setter_ && prop->setter_->IsInheritedInterface()))
                {
                    // note possibility of mismatched inheritance on get/set
                    // if possible to trip this in C#, will need to be addressed here
                    continue;
                }
            }

            if (prop->getter_ && !prop->getter_->Skip())
            {
                fType = getType = prop->getter_->GetReturnType();
            }
            if (prop->setter_ && !prop->setter_->Skip())
            {
                setType = prop->setter_->GetParameters()[0];

                if (!fType)
                    fType = setType;
                else if (fType->type_->ToString() != setType->type_->ToString())
                    continue;
            }

            if (!fType)
                continue;

            String line = klass_->IsInterface() ? "" : "public ";

            JSBClass* baseClass = klass_->GetBaseClass();
            if (baseClass)
            {
                if (baseClass->MatchProperty(prop, true))
                {
                    // always new so we don't have to deal with virtual/override on properties
                    line += "new ";
                }
            }

            String type = CSTypeHelper::GetManagedTypeString(fType, false);
            line += ToString("%s %s\n", type.CString(), prop->name_.CString());
            source += IndentLine(line);
            source += IndentLine("{\n");

            Indent();

            if (prop->getter_)
            {
                if (klass_->IsInterface())
                {
                    source += IndentLine("get;\n");
                }
                else
                {
                    source += IndentLine("get\n");
                    source += IndentLine("{\n");

                    Indent();

                    source += IndentLine(ToString("return %s();\n", prop->getter_->GetName().CString()));

                    Dedent();

                    source += IndentLine("}\n");
                }
            }

            if (prop->setter_)
            {
                if (klass_->IsInterface())
                {
                    source += IndentLine("set;\n");
                }
                else
                {
                    source += IndentLine("set\n");
                    source += IndentLine("{\n");

                    Indent();

                    source += IndentLine(ToString("%s(value);\n", prop->setter_->GetName().CString()));

                    Dedent();

                    source += IndentLine("}\n");

                }

            }

            Dedent();

            source += IndentLine("}\n\n");
        }

    }

    sourceOut += source;

}

void CSClassWriter::GenerateManagedSource(String& sourceOut)
{
    String source = "";

    if (klass_->IsNumberArray())
        return;

    Indent();

    source += "\n";
    String line;

    if (klass_->GetDocString().Length())
    {
        // monodocer -assembly:NETCore.dll -path:en -pretty
        // mdoc export-html -o htmldocs en
        source += IndentLine("/// <summary>\n");
        if (klass_->GetDocString().Contains('\n'))
            source += IndentLine("/* " + klass_->GetDocString() + "*/\n");
        else
            source += IndentLine("/// " + klass_->GetDocString() + "\n");

        source += IndentLine("/// </summary>\n");
    }

    JSBClass* baseClass = klass_->GetBaseClass();
    const StringVector& csharpInterfaces = klass_->GetCSharpInterfaces();
    const PODVector<JSBClass*>& nativeInterfaces = klass_->GetInterfaces();

    String classString = "class";

    if (klass_->IsInterface())
        classString = "interface";

    if (baseClass || csharpInterfaces.Size() || nativeInterfaces.Size())
    {
        StringVector baseStrings;

        if (baseClass)
        {
            baseStrings.Push(baseClass->GetName());
        }               

        for (unsigned i = 0; i < nativeInterfaces.Size(); i++)
        {
            baseStrings.Push(nativeInterfaces.At(i)->GetName());
        }

        for (unsigned i = 0; i < csharpInterfaces.Size(); i++)
        {
            baseStrings.Push(csharpInterfaces[i]);
        }

        String baseString = String::Joined(baseStrings, ", ");

        line = ToString("public partial %s %s%s : %s\n", classString.CString(), klass_->GetName().CString(), klass_->IsGeneric() ? "<T>" : "", baseString.CString());
    }
    else
    {
        line = ToString("public partial %s %s%s\n", classString.CString(), klass_->GetName().CString(), klass_->IsGeneric() ? "<T>" : "");
    }


    source += IndentLine(line);
    source += IndentLine("{\n");

    Indent();

    WriteManagedProperties(source);

    JSBPackage* package = klass_->GetPackage();

    // CoreCLR has pinvoke security demand code commented out, so we do not (currently) need this optimization:
    // https://github.com/dotnet/coreclr/issues/1605
    // line = "[SuppressUnmanagedCodeSecurity]\n";
    // source += IndentLine(line);

    if (!klass_->IsInterface())
    {
        line = "[DllImport (Constants.LIBNAME, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]\n";
        source += IndentLine(line);
        line = ToString("public static extern IntPtr csb_%s_%s_GetClassIDStatic();\n", package->GetName().CString(), klass_->GetName().CString());
        source += IndentLine(line);
        source += "\n";
    }

    Dedent();

    // managed functions

    CSFunctionWriter::SetWroteConstructor(false);

    for (unsigned i = 0; i < klass_->functions_.Size(); i++)
    {
        JSBFunction* function = klass_->functions_.At(i);

        if (function->Skip())
            continue;

        if (klass_->IsInterface() && function->IsConstructor())
            continue;

        if (function->IsDestructor())
            continue;

        if (klass_->IsInterface() && function->IsInheritedInterface())
            continue;

        if (CSTypeHelper::OmitFunction(function))
            continue;

        CSFunctionWriter fwriter(function);
        fwriter.GenerateManagedSource(source);

    }

    // There are some constructors being skipped (like HTTPRequest as it uses a vector of strings in args)
    // Make sure we have at least a IntPtr version
    if (!klass_->IsInterface() && !CSFunctionWriter::GetWroteConstructor() && klass_->GetName() != "RefCounted")
    {
        ATOMIC_LOGINFOF("WARNING: %s class didn't write a constructor, filling in generated native constructor", klass_->GetName().CString());

        line = ToString("public %s (IntPtr native) : base (native)\n", klass_->GetName().CString());
        source += IndentLine(line);
        source += IndentLine("{\n");
        source += IndentLine("}\n\n");
    }

    CSFunctionWriter::SetWroteConstructor(false);

    source += IndentLine("}\n");

    Dedent();

    sourceOut += source;
}


void CSClassWriter::GenerateSource(String& sourceOut)
{

}

}