Differential D3922 Diff 17366 source/scriptinterface/StructuredClone.cpp

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source/scriptinterface/StructuredClone.cpp

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				/* Copyright (C) 2021 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 "ScriptExceptions.h"
				#include "ScriptInterface.h"
				#include "ScriptRequest.h"
				#include "StructuredClone.h"

				// Ignore warnings in SM headers.
				#if GCC_VERSION \|\| CLANG_VERSION
				# pragma GCC diagnostic push
				# pragma GCC diagnostic ignored "-Wunused-parameter"
				# pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
				#elif MSC_VERSION
				# pragma warning(push, 1)
				#endif

				#include "js/StructuredClone.h"

				#if GCC_VERSION \|\| CLANG_VERSION
				# pragma GCC diagnostic pop
				#elif MSC_VERSION
				# pragma warning(pop)
				#endif

				Script::StructuredClone Script::WriteStructuredClone(const ScriptRequest& rq, JS::HandleValue v)
				{
				Script::StructuredClone ret(new JSStructuredCloneData(JS::StructuredCloneScope::SameProcess));
				JS::CloneDataPolicy policy;
				if (!JS_WriteStructuredClone(rq.cx, v, ret.get(), JS::StructuredCloneScope::SameProcess, policy, nullptr, nullptr, JS::UndefinedHandleValue))
				{
				debug_warn(L"Writing a structured clone with JS_WriteStructuredClone failed!");
				ScriptException::CatchPending(rq);
				return StructuredClone();
				}

				return ret;
				}

				void Script::ReadStructuredClone(const ScriptRequest& rq, const Script::StructuredClone& ptr, JS::MutableHandleValue ret)
				{
				JS::CloneDataPolicy policy;
				if (!JS_ReadStructuredClone(rq.cx, *ptr, JS_STRUCTURED_CLONE_VERSION, ptr->scope(), ret, policy, nullptr, nullptr))
				ScriptException::CatchPending(rq);
				}

				JS::Value Script::CloneValueFromOtherCompartment(const ScriptInterface& to, const ScriptInterface& from, JS::HandleValue val)
				{
				PROFILE("CloneValueFromOtherCompartment");
				Script::StructuredClone structuredClone;
				{
				ScriptRequest fromRq(from);
				structuredClone = WriteStructuredClone(fromRq, val);
				}
				ScriptRequest toRq(to);
				JS::RootedValue out(toRq.cx);
				ReadStructuredClone(toRq, structuredClone, &out);
				return out.get();
				}

				JS::Value Script::DeepCopy(const ScriptRequest& rq, JS::HandleValue val)
				{
				JS::RootedValue out(rq.cx);
				ReadStructuredClone(rq, WriteStructuredClone(rq, val), &out);
				return out.get();
				}