236 lines
6.8 KiB
C++
236 lines
6.8 KiB
C++
/* Copyright (C) 2010 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 "maths/Fixed.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/system/IComponent.h"
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#include "simulation2/system/ParamNode.h"
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#include "js/jsapi.h"
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template<> jsval ScriptInterface::ToJSVal<IComponent*>(JSContext* cx, IComponent* const& val)
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{
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if (val == NULL)
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return JSVAL_NULL;
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// If this is a scripted component, just return the JS object directly
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jsval instance = val->GetJSInstance();
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if (instance)
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return instance;
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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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return JSVAL_VOID;
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}
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JSObject* obj = 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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return JSVAL_VOID;
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}
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JS_SetPrivate(cx, obj, static_cast<void*>(val));
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return OBJECT_TO_JSVAL(obj);
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}
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template<> jsval ScriptInterface::ToJSVal<CParamNode>(JSContext* cx, CParamNode const& val)
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{
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// TODO: this really needs to be cached, so that entities with the same template
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// share the same this.template value (for efficiency)
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const std::map<std::string, CParamNode>& children = val.GetChildren();
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if (children.empty())
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{
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// Empty node - map to undefined
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if (val.ToString().empty())
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return JSVAL_VOID;
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// Just a string
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utf16string text(val.ToString().begin(), val.ToString().end());
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JSString* str = JS_NewUCStringCopyN(cx, text.data(), text.length());
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if (str)
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return STRING_TO_JSVAL(str);
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// TODO: report error
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return JSVAL_VOID;
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}
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// Got child nodes - convert this node into a hash-table-style object:
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ScriptInterface::LocalRootScope scope(cx);
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if (!scope.OK())
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return JSVAL_VOID; // TODO: report error
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JSObject* obj = JS_NewObject(cx, NULL, NULL, NULL);
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if (!obj)
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return JSVAL_VOID; // TODO: report error
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for (std::map<std::string, CParamNode>::const_iterator it = children.begin(); it != children.end(); ++it)
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{
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jsval childVal = ScriptInterface::ToJSVal(cx, it->second);
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if (!JS_SetProperty(cx, obj, it->first.c_str(), &childVal))
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return JSVAL_VOID; // TODO: report error
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}
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// If the node has a string too, add that as an extra property
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if (!val.ToString().empty())
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{
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jsval childVal = ScriptInterface::ToJSVal(cx, val.ToString());
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if (!JS_SetProperty(cx, obj, "_string", &childVal))
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return JSVAL_VOID; // TODO: report error
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}
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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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//JS_SealObject(cx, obj, JS_TRUE);
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// TODO: need to re-enable this when it works safely (e.g. it doesn't seal the
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// global object too (via the parent chain))
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return OBJECT_TO_JSVAL(obj);
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}
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template<> jsval ScriptInterface::ToJSVal<const CParamNode*>(JSContext* cx, const CParamNode* const& val)
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{
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if (val)
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return ToJSVal(cx, *val);
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else
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return JSVAL_VOID;
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}
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template<> bool ScriptInterface::FromJSVal<CColor>(JSContext* cx, jsval v, CColor& out)
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{
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ScriptInterface::LocalRootScope scope(cx);
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if (!scope.OK())
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return false;
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if (!JSVAL_IS_OBJECT(v))
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return false; // TODO: report type error
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JSObject* obj = JSVAL_TO_OBJECT(v);
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jsval r, g, b, a;
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if (!JS_GetProperty(cx, obj, "r", &r)) return false; // TODO: report type errors
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if (!JS_GetProperty(cx, obj, "g", &g)) return false;
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if (!JS_GetProperty(cx, obj, "b", &b)) return false;
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if (!JS_GetProperty(cx, obj, "a", &a)) return false;
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// TODO: this probably has GC bugs if a getter returns an unrooted value
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if (!FromJSVal(cx, r, out.r)) return false;
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if (!FromJSVal(cx, g, out.g)) return false;
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if (!FromJSVal(cx, b, out.b)) return false;
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if (!FromJSVal(cx, a, out.a)) return false;
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return true;
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}
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template<> jsval ScriptInterface::ToJSVal<CColor>(JSContext* cx, CColor const& val)
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{
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ScriptInterface::LocalRootScope scope(cx);
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if (!scope.OK())
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return JSVAL_VOID;
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JSObject* obj = JS_NewObject(cx, NULL, NULL, NULL);
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if (!obj)
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return JSVAL_VOID;
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jsval r = ToJSVal(cx, val.r);
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jsval g = ToJSVal(cx, val.g);
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jsval b = ToJSVal(cx, val.b);
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jsval a = ToJSVal(cx, val.a);
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JS_SetProperty(cx, obj, "r", &r);
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JS_SetProperty(cx, obj, "g", &g);
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JS_SetProperty(cx, obj, "b", &b);
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JS_SetProperty(cx, obj, "a", &a);
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return OBJECT_TO_JSVAL(obj);
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}
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template<> bool ScriptInterface::FromJSVal<CFixed_23_8>(JSContext* cx, jsval v, CFixed_23_8& out)
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{
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jsdouble ret;
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if (!JS_ValueToNumber(cx, v, &ret))
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return false;
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out = CFixed_23_8::FromDouble(ret);
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// TODO: ought to check that this conversion is consistent and portable
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return true;
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}
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template<> jsval ScriptInterface::ToJSVal<CFixed_23_8>(JSContext* cx, const CFixed_23_8& val)
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{
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jsval rval = JSVAL_VOID;
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JS_NewNumberValue(cx, val.ToDouble(), &rval); // ignore return value
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// TODO: ought to check that this conversion is consistent and portable
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return rval;
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}
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template<> bool ScriptInterface::FromJSVal<CFixedVector3D>(JSContext* cx, jsval v, CFixedVector3D& out)
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{
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ScriptInterface::LocalRootScope scope(cx);
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if (!scope.OK())
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return false;
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if (!JSVAL_IS_OBJECT(v))
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return false; // TODO: report type error
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JSObject* obj = JSVAL_TO_OBJECT(v);
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jsval p;
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if (!JS_GetProperty(cx, obj, "x", &p)) 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)) 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)) 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<> jsval ScriptInterface::ToJSVal<CFixedVector3D>(JSContext* cx, const CFixedVector3D& val)
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{
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ScriptInterface::LocalRootScope scope(cx);
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if (!scope.OK())
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return JSVAL_VOID;
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JSObject* obj = JS_NewObject(cx, NULL, NULL, NULL);
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if (!obj)
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return JSVAL_VOID;
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jsval x = ToJSVal(cx, val.X);
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jsval y = ToJSVal(cx, val.Y);
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jsval z = ToJSVal(cx, val.Z);
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JS_SetProperty(cx, obj, "x", &x);
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JS_SetProperty(cx, obj, "y", &y);
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JS_SetProperty(cx, obj, "z", &z);
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return OBJECT_TO_JSVAL(obj);
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}
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