mirror of
https://gitea.wildfiregames.com/0ad/0ad
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db9c20e0a9
JS::HandleValue is basically a wrapper around a JS::Value that is safe for exact stack rooting and moving GC. I've tried to keep this changeset rather small and isolated and therefore create additional JS::Rooted<T> values at some places where the function should eventually directly take a JS::Handle<T>. The functions "CallFunction" and "CallFunctionVoid" put their arguments inside a JS::AutoValueVector because this will be passed directly to "CallFunction_" with ESR31. Refs #2462 Refs #2415 This was SVN commit r15517.
299 lines
8.8 KiB
C++
299 lines
8.8 KiB
C++
/* Copyright (C) 2012 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "scriptinterface/ScriptInterface.h"
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#include "scriptinterface/ScriptExtraHeaders.h" // for typed arrays
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#include "maths/Fixed.h"
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#include "maths/FixedVector2D.h"
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#include "maths/FixedVector3D.h"
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#include "ps/CLogger.h"
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#include "ps/Overlay.h"
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#include "ps/utf16string.h"
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#include "simulation2/helpers/Grid.h"
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#include "simulation2/system/IComponent.h"
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#include "simulation2/system/ParamNode.h"
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#define FAIL(msg) STMT(JS_ReportError(cx, msg); return false)
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template<> void ScriptInterface::ToJSVal<IComponent*>(JSContext* cx, JS::Value& ret, IComponent* const& val)
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{
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JSAutoRequest rq(cx);
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if (val == NULL)
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{
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ret = JS::NullValue();
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return;
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}
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// If this is a scripted component, just return the JS object directly
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JS::RootedValue instance(cx, val->GetJSInstance());
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if (!instance.isNull())
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{
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ret = instance;
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return;
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}
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// Otherwise we need to construct a wrapper object
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// (TODO: cache wrapper objects?)
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JSClass* cls = val->GetJSClass();
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if (!cls)
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{
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// Report as an error, since scripts really shouldn't try to use unscriptable interfaces
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LOGERROR(L"IComponent does not have a scriptable interface");
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ret = JS::UndefinedValue();
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return;
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}
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JS::RootedObject obj(cx, JS_NewObject(cx, cls, NULL, NULL));
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if (!obj)
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{
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LOGERROR(L"Failed to construct IComponent script object");
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ret = JS::UndefinedValue();
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return;
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}
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JS_SetPrivate(obj, static_cast<void*>(val));
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ret = JS::ObjectValue(*obj);
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}
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template<> void ScriptInterface::ToJSVal<CParamNode>(JSContext* cx, JS::Value& ret, CParamNode const& val)
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{
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JSAutoRequest rq(cx);
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ret = val.ToJSVal(cx, true);
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// Prevent modifications to the object, so that it's safe to share between
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// components and to reconstruct on deserialization
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if (ret.isObject())
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JS_DeepFreezeObject(cx, &ret.toObject());
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}
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template<> void ScriptInterface::ToJSVal<const CParamNode*>(JSContext* cx, JS::Value& ret, const CParamNode* const& val)
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{
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if (val)
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ToJSVal(cx, ret, *val);
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else
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ret = JSVAL_VOID;
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}
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template<> bool ScriptInterface::FromJSVal<CColor>(JSContext* cx, JS::HandleValue v, CColor& out)
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{
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if (!v.isObject())
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FAIL("jsval not an object");
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JSAutoRequest rq(cx);
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JS::RootedObject obj(cx, &v.toObject());
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JS::RootedValue r(cx);
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JS::RootedValue g(cx);
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JS::RootedValue b(cx);
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JS::RootedValue a(cx);
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if (!JS_GetProperty(cx, obj, "r", r.address()) || !FromJSVal(cx, r, out.r))
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FAIL("Failed to get property CColor.r");
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if (!JS_GetProperty(cx, obj, "g", g.address()) || !FromJSVal(cx, g, out.g))
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FAIL("Failed to get property CColor.g");
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if (!JS_GetProperty(cx, obj, "b", b.address()) || !FromJSVal(cx, b, out.b))
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FAIL("Failed to get property CColor.b");
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if (!JS_GetProperty(cx, obj, "a", a.address()) || !FromJSVal(cx, a, out.a))
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FAIL("Failed to get property CColor.a");
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return true;
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}
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template<> void ScriptInterface::ToJSVal<CColor>(JSContext* cx, JS::Value& ret, CColor const& val)
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{
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JSAutoRequest rq(cx);
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JS::RootedObject obj(cx, JS_NewObject(cx, NULL, NULL, NULL));
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if (!obj)
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{
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ret = JSVAL_VOID;
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return;
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}
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JS::RootedValue r(cx);
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JS::RootedValue g(cx);
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JS::RootedValue b(cx);
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JS::RootedValue a(cx);
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ToJSVal(cx, r.get(), val.r);
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ToJSVal(cx, g.get(), val.g);
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ToJSVal(cx, b.get(), val.b);
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ToJSVal(cx, a.get(), val.a);
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JS_SetProperty(cx, obj, "r", r.address());
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JS_SetProperty(cx, obj, "g", g.address());
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JS_SetProperty(cx, obj, "b", b.address());
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JS_SetProperty(cx, obj, "a", a.address());
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ret = JS::ObjectValue(*obj);
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}
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template<> bool ScriptInterface::FromJSVal<fixed>(JSContext* cx, JS::HandleValue v, fixed& out)
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{
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JSAutoRequest rq(cx);
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double ret;
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if (!JS::ToNumber(cx, v, &ret))
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return false;
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out = fixed::FromDouble(ret);
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// double can precisely represent the full range of fixed, so this is a non-lossy conversion
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return true;
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}
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template<> void ScriptInterface::ToJSVal<fixed>(JSContext* UNUSED(cx), JS::Value& ret, const fixed& val)
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{
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ret = JS::NumberValue(val.ToDouble());
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}
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template<> bool ScriptInterface::FromJSVal<CFixedVector3D>(JSContext* cx, JS::HandleValue v, CFixedVector3D& out)
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{
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if (!v.isObject())
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return false; // TODO: report type error
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JSAutoRequest rq(cx);
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JS::RootedObject obj(cx, &v.toObject());
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JS::RootedValue p(cx);
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if (!JS_GetProperty(cx, obj, "x", p.address())) return false; // TODO: report type errors
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if (!FromJSVal(cx, p, out.X)) return false;
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if (!JS_GetProperty(cx, obj, "y", p.address())) return false;
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if (!FromJSVal(cx, p, out.Y)) return false;
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if (!JS_GetProperty(cx, obj, "z", p.address())) return false;
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if (!FromJSVal(cx, p, out.Z)) return false;
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return true;
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}
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template<> void ScriptInterface::ToJSVal<CFixedVector3D>(JSContext* cx, JS::Value& ret, const CFixedVector3D& val)
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{
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JSAutoRequest rq(cx);
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// apply the Vector3D prototype to the return value;
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ScriptInterface::CxPrivate* pCxPrivate = ScriptInterface::GetScriptInterfaceAndCBData(cx);
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JS::RootedObject obj(cx, JS_NewObject(cx, NULL,
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&pCxPrivate->pScriptInterface->GetCachedValue(ScriptInterface::CACHE_VECTOR3DPROTO).get().toObject(),
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NULL));
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if (!obj)
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{
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ret = JSVAL_VOID;
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return;
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}
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JS::RootedValue x(cx);
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JS::RootedValue y(cx);
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JS::RootedValue z(cx);
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ToJSVal(cx, x.get(), val.X);
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ToJSVal(cx, y.get(), val.Y);
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ToJSVal(cx, z.get(), val.Z);
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JS_SetProperty(cx, obj, "x", x.address());
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JS_SetProperty(cx, obj, "y", y.address());
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JS_SetProperty(cx, obj, "z", z.address());
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ret = JS::ObjectValue(*obj);
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}
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template<> bool ScriptInterface::FromJSVal<CFixedVector2D>(JSContext* cx, JS::HandleValue v, CFixedVector2D& out)
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{
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JSAutoRequest rq(cx);
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if (!v.isObject())
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return false; // TODO: report type error
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JS::RootedObject obj(cx, &v.toObject());
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JS::RootedValue p(cx);
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if (!JS_GetProperty(cx, obj, "x", p.address())) return false; // TODO: report type errors
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if (!FromJSVal(cx, p, out.X)) return false;
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if (!JS_GetProperty(cx, obj, "y", p.address())) return false;
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if (!FromJSVal(cx, p, out.Y)) return false;
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return true;
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}
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template<> void ScriptInterface::ToJSVal<CFixedVector2D>(JSContext* cx, JS::Value& ret, const CFixedVector2D& val)
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{
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JSAutoRequest rq(cx);
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// apply the Vector2D prototype to the return value
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ScriptInterface::CxPrivate* pCxPrivate = ScriptInterface::GetScriptInterfaceAndCBData(cx);
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JS::RootedObject obj(cx, JS_NewObject(cx, NULL,
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&pCxPrivate->pScriptInterface->GetCachedValue(ScriptInterface::CACHE_VECTOR2DPROTO).get().toObject(),
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NULL));
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if (!obj)
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{
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ret = JSVAL_VOID;
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return;
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}
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JS::RootedValue x(cx);
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JS::RootedValue y(cx);
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ToJSVal(cx, x.get(), val.X);
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ToJSVal(cx, y.get(), val.Y);
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JS_SetProperty(cx, obj, "x", x.address());
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JS_SetProperty(cx, obj, "y", y.address());
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ret = JS::ObjectValue(*obj);
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}
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template<> void ScriptInterface::ToJSVal<Grid<u8> >(JSContext* cx, JS::Value& ret, const Grid<u8>& val)
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{
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JSAutoRequest rq(cx);
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u32 length = (u32)(val.m_W * val.m_H);
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u32 nbytes = (u32)(length * sizeof(u8));
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JS::RootedObject objArr(cx, JS_NewUint8Array(cx, length));
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memcpy((void*)JS_GetUint8ArrayData(objArr), val.m_Data, nbytes);
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JS::RootedValue data(cx, JS::ObjectValue(*objArr));
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JS::RootedValue w(cx);
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JS::RootedValue h(cx);
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ScriptInterface::ToJSVal(cx, w.get(), val.m_W);
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ScriptInterface::ToJSVal(cx, h.get(), val.m_H);
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JS::RootedObject obj(cx, JS_NewObject(cx, NULL, NULL, NULL));
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JS_SetProperty(cx, obj, "width", w.address());
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JS_SetProperty(cx, obj, "height", h.address());
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JS_SetProperty(cx, obj, "data", data.address());
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ret = JS::ObjectValue(*obj);
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}
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template<> void ScriptInterface::ToJSVal<Grid<u16> >(JSContext* cx, JS::Value& ret, const Grid<u16>& val)
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{
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JSAutoRequest rq(cx);
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u32 length = (u32)(val.m_W * val.m_H);
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u32 nbytes = (u32)(length * sizeof(u16));
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JS::RootedObject objArr(cx, JS_NewUint16Array(cx, length));
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memcpy((void*)JS_GetUint16ArrayData(objArr), val.m_Data, nbytes);
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JS::RootedValue data(cx, JS::ObjectValue(*objArr));
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JS::RootedValue w(cx);
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JS::RootedValue h(cx);
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ScriptInterface::ToJSVal(cx, w.get(), val.m_W);
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ScriptInterface::ToJSVal(cx, h.get(), val.m_H);
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JS::RootedObject obj(cx, JS_NewObject(cx, NULL, NULL, NULL));
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JS_SetProperty(cx, obj, "width", w.address());
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JS_SetProperty(cx, obj, "height", h.address());
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JS_SetProperty(cx, obj, "data", data.address());
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ret = JS::ObjectValue(*obj);
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}
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