forked from mirrors/gecko-dev
153 lines
4 KiB
C++
153 lines
4 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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#include "ModuleLoadRequest.h"
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#include "ModuleScript.h"
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#include "ScriptLoader.h"
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namespace mozilla {
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namespace dom {
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#undef LOG
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#define LOG(args) \
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MOZ_LOG(ScriptLoader::gScriptLoaderLog, mozilla::LogLevel::Debug, args)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ModuleLoadRequest)
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NS_INTERFACE_MAP_END_INHERITING(ScriptLoadRequest)
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NS_IMPL_CYCLE_COLLECTION_INHERITED(ModuleLoadRequest, ScriptLoadRequest,
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mBaseURL,
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mLoader,
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mParent,
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mModuleScript,
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mImports)
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NS_IMPL_ADDREF_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
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NS_IMPL_RELEASE_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
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ModuleLoadRequest::ModuleLoadRequest(nsIScriptElement* aElement,
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ValidJSVersion aValidJSVersion,
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CORSMode aCORSMode,
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const SRIMetadata& aIntegrity,
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ScriptLoader* aLoader)
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: ScriptLoadRequest(ScriptKind::Module,
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aElement,
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aValidJSVersion,
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aCORSMode,
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aIntegrity),
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mIsTopLevel(true),
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mLoader(aLoader)
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{}
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void
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ModuleLoadRequest::Cancel()
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{
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ScriptLoadRequest::Cancel();
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mModuleScript = nullptr;
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mProgress = ScriptLoadRequest::Progress::Ready;
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CancelImports();
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mReady.RejectIfExists(NS_ERROR_DOM_ABORT_ERR, __func__);
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}
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void
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ModuleLoadRequest::CancelImports()
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{
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for (size_t i = 0; i < mImports.Length(); i++) {
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mImports[i]->Cancel();
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}
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}
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void
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ModuleLoadRequest::SetReady()
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{
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// Mark a module as ready to execute. This means that this module and all it
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// dependencies have had their source loaded, parsed as a module and the
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// modules instantiated.
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//
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// The mReady promise is used to ensure that when all dependencies of a module
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// have become ready, DependenciesLoaded is called on that module
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// request. This is set up in StartFetchingModuleDependencies.
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#ifdef DEBUG
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for (size_t i = 0; i < mImports.Length(); i++) {
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MOZ_ASSERT(mImports[i]->IsReadyToRun());
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}
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#endif
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ScriptLoadRequest::SetReady();
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mReady.ResolveIfExists(true, __func__);
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}
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void
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ModuleLoadRequest::ModuleLoaded()
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{
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// A module that was found to be marked as fetching in the module map has now
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// been loaded.
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LOG(("ScriptLoadRequest (%p): Module loaded", this));
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mModuleScript = mLoader->GetFetchedModule(mURI);
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if (!mModuleScript || mModuleScript->IsErrored()) {
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ModuleErrored();
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return;
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}
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mLoader->StartFetchingModuleDependencies(this);
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}
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void
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ModuleLoadRequest::ModuleErrored()
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{
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LOG(("ScriptLoadRequest (%p): Module errored", this));
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mLoader->CheckModuleDependenciesLoaded(this);
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MOZ_ASSERT(!mModuleScript || mModuleScript->IsErrored());
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CancelImports();
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SetReady();
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LoadFinished();
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}
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void
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ModuleLoadRequest::DependenciesLoaded()
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{
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// The module and all of its dependencies have been successfully fetched and
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// compiled.
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LOG(("ScriptLoadRequest (%p): Module dependencies loaded", this));
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MOZ_ASSERT(mModuleScript);
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mLoader->CheckModuleDependenciesLoaded(this);
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SetReady();
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LoadFinished();
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}
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void
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ModuleLoadRequest::LoadFailed()
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{
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// We failed to load the source text or an error occurred unrelated to the
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// content of the module (e.g. OOM).
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LOG(("ScriptLoadRequest (%p): Module load failed", this));
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MOZ_ASSERT(!mModuleScript);
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Cancel();
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LoadFinished();
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}
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void
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ModuleLoadRequest::LoadFinished()
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{
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mLoader->ProcessLoadedModuleTree(this);
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mLoader = nullptr;
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mParent = nullptr;
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}
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} // dom namespace
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} // mozilla namespace
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