mirror of
https://github.com/roytam1/UXP.git
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Moonchild
0d874713ef
This updates module implementation to match spec regarding handling of instantiation errors, after it was changed yet again, this time to not remember instantiation errors, but instead immediately rethrow applicable ones. Ref: BZ 1420420
114 lines
3.1 KiB
C++
114 lines
3.1 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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/*
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* A class that handles loading and evaluation of <script> elements.
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*/
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#include "ModuleScript.h"
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#include "mozilla/HoldDropJSObjects.h"
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#include "ScriptLoader.h"
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namespace mozilla {
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namespace dom {
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// A single module script. May be used to satisfy multiple load requests.
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ModuleScript)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION_CLASS(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoader)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mBaseURL)
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tmp->UnlinkModuleRecord();
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tmp->mParseError.setUndefined();
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tmp->mErrorToRethrow.setUndefined();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoader)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(ModuleScript)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mModuleRecord)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mParseError)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mErrorToRethrow)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ModuleScript)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ModuleScript)
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ModuleScript::ModuleScript(ScriptLoader *aLoader, nsIURI* aBaseURL)
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: mLoader(aLoader),
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mBaseURL(aBaseURL)
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{
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MOZ_ASSERT(mLoader);
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MOZ_ASSERT(mBaseURL);
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MOZ_ASSERT(!mModuleRecord);
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MOZ_ASSERT(!HasParseError());
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MOZ_ASSERT(!HasErrorToRethrow());
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}
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void
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ModuleScript::UnlinkModuleRecord()
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{
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// Remove module's back reference to this object request if present.
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if (mModuleRecord) {
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MOZ_ASSERT(JS::GetModuleHostDefinedField(mModuleRecord).toPrivate() ==
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this);
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JS::SetModuleHostDefinedField(mModuleRecord, JS::UndefinedValue());
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mModuleRecord = nullptr;
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}
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}
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ModuleScript::~ModuleScript()
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{
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// The object may be destroyed without being unlinked first.
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UnlinkModuleRecord();
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DropJSObjects(this);
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}
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void
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ModuleScript::SetModuleRecord(JS::Handle<JSObject*> aModuleRecord)
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{
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MOZ_ASSERT(!mModuleRecord);
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MOZ_ASSERT(!HasParseError());
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MOZ_ASSERT(!HasErrorToRethrow());
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mModuleRecord = aModuleRecord;
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// Make module's host defined field point to this module script object.
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// This is cleared in the UnlinkModuleRecord().
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JS::SetModuleHostDefinedField(mModuleRecord, JS::PrivateValue(this));
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HoldJSObjects(this);
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}
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void
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ModuleScript::SetParseError(const JS::Value& aError)
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{
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MOZ_ASSERT(!aError.isUndefined());
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MOZ_ASSERT(!HasParseError());
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MOZ_ASSERT(!HasErrorToRethrow());
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UnlinkModuleRecord();
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mParseError = aError;
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HoldJSObjects(this);
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}
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void
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ModuleScript::SetErrorToRethrow(const JS::Value& aError)
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{
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MOZ_ASSERT(!aError.isUndefined());
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MOZ_ASSERT(!HasErrorToRethrow());
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mErrorToRethrow = aError;
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}
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} // dom namespace
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} // mozilla namespace
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