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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/. */
#include "ModuleLoadRequest.h"
#include "ModuleScript.h"
#include "ScriptLoader.h"
namespace mozilla {
namespace dom {
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(ModuleLoadRequest)
NS_INTERFACE_MAP_END_INHERITING(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_INHERITED(ModuleLoadRequest, ScriptLoadRequest,
mBaseURL,
mLoader,
mModuleScript,
mImports)
NS_IMPL_ADDREF_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
NS_IMPL_RELEASE_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
ModuleLoadRequest::ModuleLoadRequest(nsIURI* aURI,
nsIScriptElement* aElement,
uint32_t aVersion,
CORSMode aCORSMode,
const SRIMetadata &aIntegrity,
ScriptLoader* aLoader)
: ScriptLoadRequest(ScriptKind::Module,
aURI,
aElement,
aVersion,
aCORSMode,
aIntegrity),
mIsTopLevel(true),
mLoader(aLoader),
mVisitedSet(new VisitedURLSet())
{
mVisitedSet->PutEntry(aURI);
}
ModuleLoadRequest::ModuleLoadRequest(nsIURI* aURI,
ModuleLoadRequest* aParent)
: ScriptLoadRequest(ScriptKind::Module,
aURI,
aParent->mElement,
aParent->mJSVersion,
aParent->mCORSMode,
aParent->mIntegrity),
mIsTopLevel(false),
mLoader(aParent->mLoader),
mVisitedSet(aParent->mVisitedSet)
{
MOZ_ASSERT(mVisitedSet->Contains(aURI));
mIsInline = false;
mReferrerPolicy = aParent->mReferrerPolicy;
}
void ModuleLoadRequest::Cancel()
{
ScriptLoadRequest::Cancel();
mModuleScript = nullptr;
mProgress = ScriptLoadRequest::Progress::Ready;
CancelImports();
mReady.RejectIfExists(NS_ERROR_DOM_ABORT_ERR, __func__);
}
void
ModuleLoadRequest::CancelImports()
{
for (size_t i = 0; i < mImports.Length(); i++) {
mImports[i]->Cancel();
}
}
void
ModuleLoadRequest::SetReady()
{
// Mark a module as ready to execute. This means that this module and all it
// dependencies have had their source loaded, parsed as a module and the
// modules instantiated.
//
// The mReady promise is used to ensure that when all dependencies of a module
// have become ready, DependenciesLoaded is called on that module
// request. This is set up in StartFetchingModuleDependencies.
#ifdef DEBUG
for (size_t i = 0; i < mImports.Length(); i++) {
MOZ_ASSERT(mImports[i]->IsReadyToRun());
}
#endif
ScriptLoadRequest::SetReady();
mReady.ResolveIfExists(true, __func__);
}
void
ModuleLoadRequest::ModuleLoaded()
{
// A module that was found to be marked as fetching in the module map has now
// been loaded.
mModuleScript = mLoader->GetFetchedModule(mURI);
if (!mModuleScript || mModuleScript->HasParseError()) {
ModuleErrored();
return;
}
mLoader->StartFetchingModuleDependencies(this);
}
void
ModuleLoadRequest::ModuleErrored()
{
mLoader->CheckModuleDependenciesLoaded(this);
MOZ_ASSERT(!mModuleScript || mModuleScript->HasParseError());
CancelImports();
SetReady();
LoadFinished();
}
void
ModuleLoadRequest::DependenciesLoaded()
{
// The module and all of its dependencies have been successfully fetched and
// compiled.
MOZ_ASSERT(mModuleScript);
mLoader->CheckModuleDependenciesLoaded(this);
SetReady();
LoadFinished();
}
void
ModuleLoadRequest::LoadFailed()
{
// We failed to load the source text or an error occurred unrelated to the
// content of the module (e.g. OOM).
MOZ_ASSERT(!mModuleScript);
Cancel();
LoadFinished();
}
void
ModuleLoadRequest::LoadFinished()
{
mLoader->ProcessLoadedModuleTree(this);
mLoader = nullptr;
}
} // dom namespace
} // mozilla namespace
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