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https://gitea.wildfiregames.com/0ad/0ad
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c6d42ebbd5
- With modules JavaScript code can be split up into multiple files. We already implemented such a mechanism (`Engine.LoadLibrary`) in multiple parts of the engine. The advantage of using modules is that it's standart (JS-devs are familiar with it) and it doesn't has to be implemented multiple times. Note that `Engine.LoadLibrary` loads all files in a directory while the new `import` only loads one file. - With modules seemingly global variables are local to that script/module. We already implemented such a mechanism (`ScriptInterface::LoadScript`).
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/* Copyright (C) 2025 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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#ifndef INCLUDED_SCRIPTMODULELOADER
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#define INCLUDED_SCRIPTMODULELOADER
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#include "lib/file/vfs/vfs_path.h"
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#include "scriptinterface/ScriptTypes.h"
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#include <unordered_map>
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class ScriptContext;
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class ScriptRequest;
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namespace Script
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{
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class ModuleLoader
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{
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public:
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friend ScriptContext;
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class CompiledModule
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{
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public:
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CompiledModule(const ScriptRequest& rq, const VfsPath& filePath);
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JS::PersistentRootedObject m_ModuleObject;
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};
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using RegistryType = std::unordered_map<VfsPath, CompiledModule>;
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/**
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* Load the specified module and all module it imports recursively.
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*
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* @param rq @c globalThis is taken from this @c ScriptRequest.
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* @param modulePath The path to the file which should be loaded as a module.
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*/
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void LoadModule(const ScriptRequest& rq, const VfsPath& modulePath);
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private:
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// Functions used by the `ScriptContext`.
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[[nodiscard]] static JSObject* ResolveHook(JSContext* cx, JS::HandleValue,
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JS::HandleObject moduleRequest) noexcept;
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RegistryType m_Registry;
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};
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} // namespace Script
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#endif // INCLUDED_SCRIPTMODULELOADER
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