101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* A class that handles loading and evaluation of <script> elements.
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*/
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#include "ModuleScript.h"
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#include "mozilla/HoldDropJSObjects.h"
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#include "ScriptLoader.h"
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namespace mozilla {
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namespace dom {
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// A single module script. May be used to satisfy multiple load requests.
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ModuleScript)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION_CLASS(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoader)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mBaseURL)
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tmp->UnlinkModuleRecord();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoader)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mModuleRecord)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mException)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ModuleScript)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ModuleScript)
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ModuleScript::ModuleScript(ScriptLoader *aLoader, nsIURI* aBaseURL,
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JS::Handle<JSObject*> aModuleRecord)
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: mLoader(aLoader),
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mBaseURL(aBaseURL),
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mModuleRecord(aModuleRecord),
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mInstantiationState(Uninstantiated)
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{
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MOZ_ASSERT(mLoader);
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MOZ_ASSERT(mBaseURL);
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MOZ_ASSERT(mModuleRecord);
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MOZ_ASSERT(mException.isUndefined());
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// Make module's host defined field point to this module script object.
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// This is cleared in the UnlinkModuleRecord().
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JS::SetModuleHostDefinedField(mModuleRecord, JS::PrivateValue(this));
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HoldJSObjects(this);
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}
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void
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ModuleScript::UnlinkModuleRecord()
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{
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// Remove module's back reference to this object request if present.
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if (mModuleRecord) {
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MOZ_ASSERT(JS::GetModuleHostDefinedField(mModuleRecord).toPrivate() ==
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this);
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JS::SetModuleHostDefinedField(mModuleRecord, JS::UndefinedValue());
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}
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mModuleRecord = nullptr;
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mException.setUndefined();
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}
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ModuleScript::~ModuleScript()
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{
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if (mModuleRecord) {
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// The object may be destroyed without being unlinked first.
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UnlinkModuleRecord();
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}
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DropJSObjects(this);
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}
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void
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ModuleScript::SetInstantiationResult(JS::Handle<JS::Value> aMaybeException)
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{
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MOZ_ASSERT(mInstantiationState == Uninstantiated);
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MOZ_ASSERT(mModuleRecord);
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MOZ_ASSERT(mException.isUndefined());
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if (aMaybeException.isUndefined()) {
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mInstantiationState = Instantiated;
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} else {
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mModuleRecord = nullptr;
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mException = aMaybeException;
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mInstantiationState = Errored;
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}
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}
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} // dom namespace
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} // mozilla namespace
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