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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=99: */
/* 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 mozJSComponentLoader_h
#define mozJSComponentLoader_h
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/ModuleLoader.h"
#include "nsAutoPtr.h"
#include "nsISupports.h"
#include "nsIObserver.h"
#include "nsIURI.h"
#include "xpcIJSModuleLoader.h"
#include "nsClassHashtable.h"
#include "nsDataHashtable.h"
#include "jsapi.h"
#include "xpcIJSGetFactory.h"
class nsIFile;
class nsIPrincipal;
class nsIXPConnectJSObjectHolder;
class ComponentLoaderInfo;
/* 6bd13476-1dd2-11b2-bbef-f0ccb5fa64b6 (thanks, mozbot) */
#define MOZJSCOMPONENTLOADER_CID \
{0x6bd13476, 0x1dd2, 0x11b2, \
{ 0xbb, 0xef, 0xf0, 0xcc, 0xb5, 0xfa, 0x64, 0xb6 }}
#define MOZJSCOMPONENTLOADER_CONTRACTID "@mozilla.org/moz/jsloader;1"
class mozJSComponentLoader : public mozilla::ModuleLoader,
public xpcIJSModuleLoader,
public nsIObserver
{
public:
NS_DECL_ISUPPORTS
NS_DECL_XPCIJSMODULELOADER
NS_DECL_NSIOBSERVER
mozJSComponentLoader();
// ModuleLoader
const mozilla::Module* LoadModule(mozilla::FileLocation& aFile) override;
nsresult FindTargetObject(JSContext* aCx,
JS::MutableHandleObject aTargetObject);
static mozJSComponentLoader* Get() { return sSelf; }
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
protected:
virtual ~mozJSComponentLoader();
static mozJSComponentLoader* sSelf;
nsresult ReallyInit();
void UnloadModules();
JSObject* PrepareObjectForLocation(JSContext* aCx,
nsIFile* aComponentFile,
nsIURI* aComponent,
bool aReuseLoaderGlobal,
bool* aRealFile);
nsresult ObjectForLocation(ComponentLoaderInfo& aInfo,
nsIFile* aComponentFile,
JS::MutableHandleObject aObject,
JS::MutableHandleScript aTableScript,
char** location,
bool aCatchException,
JS::MutableHandleValue aException);
nsresult ImportInto(const nsACString& aLocation,
JS::HandleObject targetObj,
JSContext* callercx,
JS::MutableHandleObject vp);
nsCOMPtr<nsIComponentManager> mCompMgr;
nsCOMPtr<nsIPrincipal> mSystemPrincipal;
nsCOMPtr<nsIXPConnectJSObjectHolder> mLoaderGlobal;
class ModuleEntry : public mozilla::Module
{
public:
explicit ModuleEntry(JS::RootingContext* aRootingCx)
: mozilla::Module(), obj(aRootingCx), thisObjectKey(aRootingCx)
{
mVersion = mozilla::Module::kVersion;
mCIDs = nullptr;
mContractIDs = nullptr;
mCategoryEntries = nullptr;
getFactoryProc = GetFactory;
loadProc = nullptr;
unloadProc = nullptr;
location = nullptr;
}
~ModuleEntry() {
Clear();
}
void Clear() {
getfactoryobj = nullptr;
if (obj) {
mozilla::AutoJSContext cx;
JSAutoCompartment ac(cx, obj);
if (JS_HasExtensibleLexicalEnvironment(obj)) {
JS_SetAllNonReservedSlotsToUndefined(cx, JS_ExtensibleLexicalEnvironment(obj));
}
JS_SetAllNonReservedSlotsToUndefined(cx, obj);
obj = nullptr;
thisObjectKey = nullptr;
}
if (location)
free(location);
obj = nullptr;
thisObjectKey = nullptr;
location = nullptr;
}
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
static already_AddRefed<nsIFactory> GetFactory(const mozilla::Module& module,
const mozilla::Module::CIDEntry& entry);
nsCOMPtr<xpcIJSGetFactory> getfactoryobj;
JS::PersistentRootedObject obj;
JS::PersistentRootedScript thisObjectKey;
char* location;
};
friend class ModuleEntry;
static size_t DataEntrySizeOfExcludingThis(const nsACString& aKey, ModuleEntry* const& aData,
mozilla::MallocSizeOf aMallocSizeOf, void* arg);
static size_t ClassEntrySizeOfExcludingThis(const nsACString& aKey,
const nsAutoPtr<ModuleEntry>& aData,
mozilla::MallocSizeOf aMallocSizeOf, void* arg);
// Modules are intentionally leaked, but still cleared.
nsDataHashtable<nsCStringHashKey, ModuleEntry*> mModules;
nsClassHashtable<nsCStringHashKey, ModuleEntry> mImports;
nsDataHashtable<nsCStringHashKey, ModuleEntry*> mInProgressImports;
bool mInitialized;
bool mReuseLoaderGlobal;
};
#endif
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