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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 "mozilla/HoldDropJSObjects.h"
#include "LoadedScript.h"
#include "ScriptLoader.h"
namespace mozilla {
namespace dom {
#undef LOG
#define LOG(args) \
MOZ_LOG(ScriptLoader::gScriptLoaderLog, mozilla::LogLevel::Debug, args)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ModuleLoadRequest)
NS_INTERFACE_MAP_END_INHERITING(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_MULTI_ZONE_JSHOLDER_CLASS(ModuleLoadRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoader, mModuleScript, mImports)
tmp->ClearDynamicImport();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoader, mModuleScript, mImports)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(ModuleLoadRequest,
ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDynamicReferencingPrivate)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDynamicSpecifier)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDynamicPromise)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_ADDREF_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
NS_IMPL_RELEASE_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
static VisitedURLSet* NewVisitedSetForTopLevelImport(nsIURI* aURI) {
auto set = new VisitedURLSet();
set->PutEntry(aURI);
return set;
}
/* static */
ModuleLoadRequest* ModuleLoadRequest::CreateTopLevel(
nsIURI* aURI, ScriptFetchOptions* aFetchOptions,
const SRIMetadata& aIntegrity, nsIURI* aReferrer, ScriptLoader* aLoader) {
return new ModuleLoadRequest(aURI, aFetchOptions, aIntegrity, aReferrer,
true, /* is top level */
false, /* is dynamic import */
aLoader, NewVisitedSetForTopLevelImport(aURI));
}
/* static */
ModuleLoadRequest* ModuleLoadRequest::CreateStaticImport(
nsIURI* aURI, ModuleLoadRequest* aParent) {
auto request =
new ModuleLoadRequest(aURI, aParent->mFetchOptions, SRIMetadata(),
aParent->mURI, false, /* is top level */
false, /* is dynamic import */
aParent->mLoader, aParent->mVisitedSet);
request->mIsInline = false;
request->mScriptMode = aParent->mScriptMode;
return request;
}
/* static */
ModuleLoadRequest* ModuleLoadRequest::CreateDynamicImport(
nsIURI* aURI, ScriptFetchOptions* aFetchOptions, nsIURI* aBaseURL,
ScriptLoader* aLoader, JS::Handle<JS::Value> aReferencingPrivate,
JS::Handle<JSString*> aSpecifier, JS::Handle<JSObject*> aPromise) {
MOZ_ASSERT(aSpecifier);
MOZ_ASSERT(aPromise);
auto request = new ModuleLoadRequest(
aURI, aFetchOptions, SRIMetadata(), aBaseURL, true, /* is top level */
true, /* is dynamic import */
aLoader, NewVisitedSetForTopLevelImport(aURI));
request->mIsInline = false;
request->mScriptMode = ScriptMode::eAsync;
request->mDynamicReferencingPrivate = aReferencingPrivate;
request->mDynamicSpecifier = aSpecifier;
request->mDynamicPromise = aPromise;
HoldJSObjects(request);
return request;
}
ModuleLoadRequest::ModuleLoadRequest(
nsIURI* aURI, ScriptFetchOptions* aFetchOptions,
const SRIMetadata& aIntegrity, nsIURI* aReferrer, bool aIsTopLevel,
bool aIsDynamicImport, ScriptLoader* aLoader, VisitedURLSet* aVisitedSet)
: ScriptLoadRequest(ScriptKind::eModule, aURI, aFetchOptions, aIntegrity,
aReferrer),
mIsTopLevel(aIsTopLevel),
mIsDynamicImport(aIsDynamicImport),
mLoader(aLoader),
mVisitedSet(aVisitedSet) {}
void ModuleLoadRequest::Cancel() {
ScriptLoadRequest::Cancel();
mModuleScript = nullptr;
mProgress = ScriptLoadRequest::Progress::eReady;
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.
LOG(("ScriptLoadRequest (%p): Module loaded", this));
mModuleScript = mLoader->GetFetchedModule(mURI);
if (!mModuleScript || mModuleScript->HasParseError()) {
ModuleErrored();
return;
}
mLoader->StartFetchingModuleDependencies(this);
}
void ModuleLoadRequest::ModuleErrored() {
if (IsCanceled()) {
return;
}
LOG(("ScriptLoadRequest (%p): Module errored", this));
mLoader->CheckModuleDependenciesLoaded(this);
MOZ_ASSERT(!mModuleScript || mModuleScript->HasParseError());
CancelImports();
SetReady();
LoadFinished();
}
void ModuleLoadRequest::DependenciesLoaded() {
if (IsCanceled()) {
return;
}
// The module and all of its dependencies have been successfully fetched and
// compiled.
LOG(("ScriptLoadRequest (%p): Module dependencies loaded", this));
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).
LOG(("ScriptLoadRequest (%p): Module load failed", this));
MOZ_ASSERT(!mModuleScript);
Cancel();
LoadFinished();
}
void ModuleLoadRequest::LoadFinished() {
mLoader->ProcessLoadedModuleTree(this);
mLoader = nullptr;
}
void ModuleLoadRequest::ClearDynamicImport() {
mDynamicReferencingPrivate = JS::UndefinedValue();
mDynamicSpecifier = nullptr;
mDynamicPromise = nullptr;
}
} // namespace dom
} // namespace mozilla
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