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0ad/source/simulation2/scripting/EngineScriptConversions.cpp
leper b18cd3254c Test FixedVector{2,3}D script conversions, and test calling functions of the prototypes. 
Also ENSURE that the given value identifier is actually present in the
cache instead of creating one if it is not.

This was SVN commit r17603.
2016-01-04 21:41:40 +00:00

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/* Copyright (C) 2016 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "scriptinterface/ScriptInterface.h"
#include "scriptinterface/ScriptExtraHeaders.h" // for typed arrays
#include "maths/Fixed.h"
#include "maths/FixedVector2D.h"
#include "maths/FixedVector3D.h"
#include "ps/CLogger.h"
#include "ps/Shapes.h"
#include "ps/utf16string.h"
#include "simulation2/helpers/Grid.h"
#include "simulation2/system/IComponent.h"
#include "simulation2/system/ParamNode.h"
#define FAIL(msg) STMT(JS_ReportError(cx, msg); return false)
template<> void ScriptInterface::ToJSVal<IComponent*>(JSContext* cx, JS::MutableHandleValue ret, IComponent* const& val)
{
JSAutoRequest rq(cx);
if (val == NULL)
{
ret.setNull();
return;
}
// If this is a scripted component, just return the JS object directly
JS::RootedValue instance(cx, val->GetJSInstance());
if (!instance.isNull())
{
ret.set(instance);
return;
}
// Otherwise we need to construct a wrapper object
// (TODO: cache wrapper objects?)
JS::RootedObject obj(cx);
if (!val->NewJSObject(*ScriptInterface::GetScriptInterfaceAndCBData(cx)->pScriptInterface, &obj))
{
// Report as an error, since scripts really shouldn't try to use unscriptable interfaces
LOGERROR("IComponent does not have a scriptable interface");
ret.setUndefined();
return;
}
JS_SetPrivate(obj, static_cast<void*>(val));
ret.setObject(*obj);
}
template<> void ScriptInterface::ToJSVal<CParamNode>(JSContext* cx, JS::MutableHandleValue ret, CParamNode const& val)
{
JSAutoRequest rq(cx);
val.ToJSVal(cx, true, ret);
// Prevent modifications to the object, so that it's safe to share between
// components and to reconstruct on deserialization
if (ret.isObject())
{
JS::RootedObject obj(cx, &ret.toObject());
JS_DeepFreezeObject(cx, obj);
}
}
template<> void ScriptInterface::ToJSVal<const CParamNode*>(JSContext* cx, JS::MutableHandleValue ret, const CParamNode* const& val)
{
if (val)
ToJSVal(cx, ret, *val);
else
ret.setUndefined();
}
template<> bool ScriptInterface::FromJSVal<CColor>(JSContext* cx, JS::HandleValue v, CColor& out)
{
if (!v.isObject())
FAIL("JS::HandleValue not an object");
JSAutoRequest rq(cx);
JS::RootedObject obj(cx, &v.toObject());
JS::RootedValue r(cx);
JS::RootedValue g(cx);
JS::RootedValue b(cx);
JS::RootedValue a(cx);
if (!JS_GetProperty(cx, obj, "r", &r) || !FromJSVal(cx, r, out.r))
FAIL("Failed to get property CColor.r");
if (!JS_GetProperty(cx, obj, "g", &g) || !FromJSVal(cx, g, out.g))
FAIL("Failed to get property CColor.g");
if (!JS_GetProperty(cx, obj, "b", &b) || !FromJSVal(cx, b, out.b))
FAIL("Failed to get property CColor.b");
if (!JS_GetProperty(cx, obj, "a", &a) || !FromJSVal(cx, a, out.a))
FAIL("Failed to get property CColor.a");
return true;
}
template<> void ScriptInterface::ToJSVal<CColor>(JSContext* cx, JS::MutableHandleValue ret, CColor const& val)
{
JSAutoRequest rq(cx);
JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr()));
if (!obj)
{
ret.setUndefined();
return;
}
JS::RootedValue r(cx);
JS::RootedValue g(cx);
JS::RootedValue b(cx);
JS::RootedValue a(cx);
ToJSVal(cx, &r, val.r);
ToJSVal(cx, &g, val.g);
ToJSVal(cx, &b, val.b);
ToJSVal(cx, &a, val.a);
JS_SetProperty(cx, obj, "r", r);
JS_SetProperty(cx, obj, "g", g);
JS_SetProperty(cx, obj, "b", b);
JS_SetProperty(cx, obj, "a", a);
ret.setObject(*obj);
}
template<> bool ScriptInterface::FromJSVal<fixed>(JSContext* cx, JS::HandleValue v, fixed& out)
{
JSAutoRequest rq(cx);
double ret;
if (!JS::ToNumber(cx, v, &ret))
return false;
out = fixed::FromDouble(ret);
// double can precisely represent the full range of fixed, so this is a non-lossy conversion
return true;
}
template<> void ScriptInterface::ToJSVal<fixed>(JSContext* UNUSED(cx), JS::MutableHandleValue ret, const fixed& val)
{
ret.set(JS::NumberValue(val.ToDouble()));
}
template<> bool ScriptInterface::FromJSVal<CFixedVector3D>(JSContext* cx, JS::HandleValue v, CFixedVector3D& out)
{
if (!v.isObject())
return false; // TODO: report type error
JSAutoRequest rq(cx);
JS::RootedObject obj(cx, &v.toObject());
JS::RootedValue p(cx);
if (!JS_GetProperty(cx, obj, "x", &p)) return false; // TODO: report type errors
if (!FromJSVal(cx, p, out.X)) return false;
if (!JS_GetProperty(cx, obj, "y", &p)) return false;
if (!FromJSVal(cx, p, out.Y)) return false;
if (!JS_GetProperty(cx, obj, "z", &p)) return false;
if (!FromJSVal(cx, p, out.Z)) return false;
return true;
}
template<> void ScriptInterface::ToJSVal<CFixedVector3D>(JSContext* cx, JS::MutableHandleValue ret, const CFixedVector3D& val)
{
JSAutoRequest rq(cx);
// apply the Vector3D prototype to the return value;
ScriptInterface::CxPrivate* pCxPrivate = ScriptInterface::GetScriptInterfaceAndCBData(cx);
JS::RootedObject proto(cx, &pCxPrivate->pScriptInterface->GetCachedValue(ScriptInterface::CACHE_VECTOR3DPROTO).toObject());
JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, proto, JS::NullPtr()));
if (!obj)
{
ret.setUndefined();
return;
}
JS::RootedValue x(cx);
JS::RootedValue y(cx);
JS::RootedValue z(cx);
ToJSVal(cx, &x, val.X);
ToJSVal(cx, &y, val.Y);
ToJSVal(cx, &z, val.Z);
JS_SetProperty(cx, obj, "x", x);
JS_SetProperty(cx, obj, "y", y);
JS_SetProperty(cx, obj, "z", z);
ret.setObject(*obj);
}
template<> bool ScriptInterface::FromJSVal<CFixedVector2D>(JSContext* cx, JS::HandleValue v, CFixedVector2D& out)
{
JSAutoRequest rq(cx);
if (!v.isObject())
return false; // TODO: report type error
JS::RootedObject obj(cx, &v.toObject());
JS::RootedValue p(cx);
if (!JS_GetProperty(cx, obj, "x", &p)) return false; // TODO: report type errors
if (!FromJSVal(cx, p, out.X)) return false;
if (!JS_GetProperty(cx, obj, "y", &p)) return false;
if (!FromJSVal(cx, p, out.Y)) return false;
return true;
}
template<> void ScriptInterface::ToJSVal<CFixedVector2D>(JSContext* cx, JS::MutableHandleValue ret, const CFixedVector2D& val)
{
JSAutoRequest rq(cx);
// apply the Vector2D prototype to the return value
ScriptInterface::CxPrivate* pCxPrivate = ScriptInterface::GetScriptInterfaceAndCBData(cx);
JS::RootedObject proto(cx, &pCxPrivate->pScriptInterface->GetCachedValue(ScriptInterface::CACHE_VECTOR2DPROTO).toObject());
JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, proto, JS::NullPtr()));
if (!obj)
{
ret.setUndefined();
return;
}
JS::RootedValue x(cx);
JS::RootedValue y(cx);
ToJSVal(cx, &x, val.X);
ToJSVal(cx, &y, val.Y);
JS_SetProperty(cx, obj, "x", x);
JS_SetProperty(cx, obj, "y", y);
ret.setObject(*obj);
}
template<> void ScriptInterface::ToJSVal<Grid<u8> >(JSContext* cx, JS::MutableHandleValue ret, const Grid<u8>& val)
{
JSAutoRequest rq(cx);
u32 length = (u32)(val.m_W * val.m_H);
u32 nbytes = (u32)(length * sizeof(u8));
JS::RootedObject objArr(cx, JS_NewUint8Array(cx, length));
memcpy((void*)JS_GetUint8ArrayData(objArr), val.m_Data, nbytes);
JS::RootedValue data(cx, JS::ObjectValue(*objArr));
JS::RootedValue w(cx);
JS::RootedValue h(cx);
ScriptInterface::ToJSVal(cx, &w, val.m_W);
ScriptInterface::ToJSVal(cx, &h, val.m_H);
JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr()));
JS_SetProperty(cx, obj, "width", w);
JS_SetProperty(cx, obj, "height", h);
JS_SetProperty(cx, obj, "data", data);
ret.setObject(*obj);
}
template<> void ScriptInterface::ToJSVal<Grid<u16> >(JSContext* cx, JS::MutableHandleValue ret, const Grid<u16>& val)
{
JSAutoRequest rq(cx);
u32 length = (u32)(val.m_W * val.m_H);
u32 nbytes = (u32)(length * sizeof(u16));
JS::RootedObject objArr(cx, JS_NewUint16Array(cx, length));
memcpy((void*)JS_GetUint16ArrayData(objArr), val.m_Data, nbytes);
JS::RootedValue data(cx, JS::ObjectValue(*objArr));
JS::RootedValue w(cx);
JS::RootedValue h(cx);
ScriptInterface::ToJSVal(cx, &w, val.m_W);
ScriptInterface::ToJSVal(cx, &h, val.m_H);
JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr()));
JS_SetProperty(cx, obj, "width", w);
JS_SetProperty(cx, obj, "height", h);
JS_SetProperty(cx, obj, "data", data);
ret.setObject(*obj);
}
// TODO: This is copy-pasted from scriptinterface/ScriptConversions.cpp (#define VECTOR stuff), would be nice to remove the duplication
template<> void ScriptInterface::ToJSVal<std::vector<CFixedVector2D> >(JSContext* cx, JS::MutableHandleValue ret, const std::vector<CFixedVector2D>& val)
{
JSAutoRequest rq(cx);
JS::RootedObject obj(cx, JS_NewArrayObject(cx, 0));
if (!obj)
{
ret.setUndefined();
return;
}
for (size_t i = 0; i < val.size(); ++i)
{
JS::RootedValue el(cx);
ScriptInterface::ToJSVal<CFixedVector2D>(cx, &el, val[i]);
JS_SetElement(cx, obj, i, el);
}
ret.setObject(*obj);
}
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