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