Issue #1603 - Part 2: Split some classes out of ScriptLoader.cpp

This splits ScriptLoader up the same way Mozilla did with the exception of
ScriptRequest due to the fact that ScriptLoader and ScriptRequest are
interdependent and would create a circular dependency if split apart when not
using unified building.

1 files changed, 81 insertions, 0 deletions

diff --git a/dom/script/ModuleLoadRequest.h b/dom/script/ModuleLoadRequest.h
new file mode 100644
index 000000000..0119fad38
--- /dev/null
+++ b/dom/script/ModuleLoadRequest.h
@@ -0,0 +1,81 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_ModuleLoadRequest_h
+#define mozilla_dom_ModuleLoadRequest_h
+
+#include "mozilla/dom/ScriptLoader.h"
+#include "mozilla/MozPromise.h"
+
+namespace mozilla {
+namespace dom {
+
+class ModuleScript;
+class ScriptLoader;
+
+// A load request for a module, created for every top level module script and
+// every module import. Load request can share a ModuleScript if there are
+// multiple imports of the same module.
+
+class ModuleLoadRequest final : public ScriptLoadRequest
+{
+  ~ModuleLoadRequest() {}
+
+  ModuleLoadRequest(const ModuleLoadRequest& aOther) = delete;
+  ModuleLoadRequest(ModuleLoadRequest&& aOther) = delete;
+
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ModuleLoadRequest, ScriptLoadRequest)
+
+  ModuleLoadRequest(nsIScriptElement* aElement,
+                    uint32_t aVersion,
+                    CORSMode aCORSMode,
+                    const SRIMetadata& aIntegrity,
+                    ScriptLoader* aLoader);
+
+  bool IsTopLevel() const {
+    return mIsTopLevel;
+  }
+
+  void SetReady() override;
+  void Cancel() override;
+
+  void ModuleLoaded();
+  void DependenciesLoaded();
+  void LoadFailed();
+
+  // Is this a request for a top level module script or an import?
+  bool mIsTopLevel;
+
+  // The base URL used for resolving relative module imports.
+  nsCOMPtr<nsIURI> mBaseURL;
+
+  // Pointer to the script loader, used to trigger actions when the module load
+  // finishes.
+  RefPtr<ScriptLoader> mLoader;
+
+  // The importing module, or nullptr for top level module scripts.  Used to
+  // implement the ancestor list checked when fetching module dependencies.
+  RefPtr<ModuleLoadRequest> mParent;
+
+  // Set to a module script object after a successful load or nullptr on
+  // failure.
+  RefPtr<ModuleScript> mModuleScript;
+
+  // A promise that is completed on successful load of this module and all of
+  // its dependencies, indicating that the module is ready for instantiation and
+  // evaluation.
+  MozPromiseHolder<GenericPromise> mReady;
+
+  // Array of imported modules.
+  nsTArray<RefPtr<ModuleLoadRequest>> mImports;
+};
+
+} // dom namespace
+} // mozilla namespace
+
+#endif // mozilla_dom_ModuleLoadRequest_h
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