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fune/toolkit/components/aboutthirdparty/AboutThirdParty.cpp

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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 "AboutThirdParty.h"
#include "AboutThirdPartyUtils.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/NativeNt.h"
#include "mozilla/StaticPtr.h"
#include "MsiDatabase.h"
#include "nsComponentManagerUtils.h"
#include "nsIWindowsRegKey.h"
#include "nsThreadUtils.h"
#include <objbase.h>
using namespace mozilla;
namespace {
// A callback function passed to EnumSubkeys uses this type
// to control the enumeration loop.
enum class CallbackResult { Continue, Stop };
template <typename CallbackT>
void EnumSubkeys(nsIWindowsRegKey* aRegBase, const CallbackT& aCallback) {
uint32_t count = 0;
if (NS_FAILED(aRegBase->GetChildCount(&count))) {
return;
}
for (uint32_t i = 0; i < count; ++i) {
nsAutoString subkeyName;
if (NS_FAILED(aRegBase->GetChildName(i, subkeyName))) {
continue;
}
nsCOMPtr<nsIWindowsRegKey> subkey;
if (NS_FAILED(aRegBase->OpenChild(subkeyName, nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(subkey)))) {
continue;
}
CallbackResult result = aCallback(subkeyName, subkey);
if (result == CallbackResult::Continue) {
continue;
} else if (result == CallbackResult::Stop) {
break;
} else {
MOZ_ASSERT_UNREACHABLE("Unexpected CallbackResult.");
}
}
}
} // anonymous namespace
InstallLocationComparator::InstallLocationComparator(const nsAString& aFilePath)
: mFilePath(aFilePath) {}
int InstallLocationComparator::operator()(
const InstallLocationT& aLocation) const {
// Firstly we check whether mFilePath begins with aLocation.
// If yes, mFilePath is a part of the target installation,
// so we return 0 showing match.
const nsAString& location = aLocation.first();
size_t locationLen = location.Length();
if (locationLen <= mFilePath.Length() &&
nsCaseInsensitiveStringComparator(mFilePath.BeginReading(),
location.BeginReading(), locationLen,
locationLen) == 0) {
return 0;
}
return CompareIgnoreCase(mFilePath, location);
}
// The InstalledApplications class behaves like Chrome's InstalledApplications,
// which collects installed applications from two resources below.
//
// 1) Path strings in MSI package components
// An MSI package is consisting of multiple components. This class collects
// MSI components representing a file and stores them as a hash table.
//
// 2) Install location paths in the InstallLocation registry value
// If an application's installer is not MSI but sets the InstallLocation
// registry value, we can use it to search for an application by comparing
// a target module is located under that location path. This class stores
// location path strings as a sorted array so that we can binary-search it.
class InstalledApplications final {
// Limit the number of entries to avoid consuming too much memory
constexpr static uint32_t kMaxComponents = 1000000;
constexpr static uint32_t kMaxInstallLocations = 1000;
nsCOMPtr<nsIWindowsRegKey> mInstallerData;
nsCOMPtr<nsIInstalledApplication> mCurrentApp;
ComponentPathMapT mComponentPaths;
nsTArray<InstallLocationT> mLocations;
void AddInstallLocation(nsIWindowsRegKey* aProductSubKey) {
nsString location;
if (NS_FAILED(
aProductSubKey->ReadStringValue(u"InstallLocation"_ns, location)) ||
location.IsEmpty()) {
return;
}
if (location.Last() != u'\\') {
location.Append(u'\\');
}
mLocations.EmplaceBack(location, this->mCurrentApp);
}
void AddComponentGuid(const nsString& aPackedProductGuid,
const nsString& aPackedComponentGuid) {
nsAutoString componentSubkey(L"Components\\");
componentSubkey += aPackedComponentGuid;
// Pick a first value in the subkeys under |componentSubkey|.
nsString componentPath;
EnumSubkeys(mInstallerData, [&aPackedProductGuid, &componentSubkey,
&componentPath](const nsString& aSid,
nsIWindowsRegKey* aSidSubkey) {
// If we have a value in |componentPath|, the loop should
// have been stopped.
MOZ_ASSERT(componentPath.IsEmpty());
nsCOMPtr<nsIWindowsRegKey> compKey;
nsresult rv =
aSidSubkey->OpenChild(componentSubkey, nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(compKey));
if (NS_FAILED(rv)) {
return CallbackResult::Continue;
}
nsString compData;
if (NS_FAILED(compKey->ReadStringValue(aPackedProductGuid, compData))) {
return CallbackResult::Continue;
}
if (!CorrectMsiComponentPath(compData)) {
return CallbackResult::Continue;
}
componentPath = std::move(compData);
return CallbackResult::Stop;
});
if (componentPath.IsEmpty()) {
return;
}
// Use a full path as a key rather than a leaf name because
// the same name's module can be installed under system32
// and syswow64.
mComponentPaths.WithEntryHandle(componentPath, [this](auto&& addPtr) {
if (addPtr) {
// If the same file appeared in multiple installations, we set null
// for its value because there is no way to know which installation is
// the real owner.
addPtr.Data() = nullptr;
} else {
addPtr.Insert(this->mCurrentApp);
}
});
}
void AddProduct(const nsString& aProductId,
nsIWindowsRegKey* aProductSubKey) {
nsString displayName;
if (NS_FAILED(
aProductSubKey->ReadStringValue(u"DisplayName"_ns, displayName)) ||
displayName.IsEmpty()) {
// Skip if no name is found.
return;
}
nsString publisher;
if (NS_SUCCEEDED(
aProductSubKey->ReadStringValue(u"Publisher"_ns, publisher)) &&
publisher.EqualsIgnoreCase("Microsoft") &&
publisher.EqualsIgnoreCase("Microsoft Corporation")) {
// Skip if the publisher is Microsoft because it's not a third-party.
// We don't skip an application without the publisher name.
return;
}
mCurrentApp =
new InstalledApplication(std::move(displayName), std::move(publisher));
// Try an MSI database first because it's more accurate,
// then fall back to the InstallLocation key.
do {
if (!mInstallerData) {
break;
}
nsAutoString packedProdGuid;
if (!MsiPackGuid(aProductId, packedProdGuid)) {
break;
}
auto db = MsiDatabase::FromProductId(aProductId.get());
if (db.isNothing()) {
break;
}
db->ExecuteSingleColumnQuery(
L"SELECT DISTINCT ComponentId FROM Component",
[this, &packedProdGuid](const wchar_t* aComponentGuid) {
if (this->mComponentPaths.Count() >= kMaxComponents) {
return MsiDatabase::CallbackResult::Stop;
}
nsAutoString packedComponentGuid;
if (MsiPackGuid(nsDependentString(aComponentGuid),
packedComponentGuid)) {
this->AddComponentGuid(packedProdGuid, packedComponentGuid);
}
return MsiDatabase::CallbackResult::Continue;
});
// We've decided to collect data from an MSI database.
// Exiting the function.
return;
} while (false);
if (mLocations.Length() >= kMaxInstallLocations) {
return;
}
// If we cannot use an MSI database for any reason,
// try the InstallLocation key.
AddInstallLocation(aProductSubKey);
}
public:
InstalledApplications() {
nsresult rv;
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
if (NS_SUCCEEDED(rv) &&
NS_SUCCEEDED(regKey->Open(
nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE,
u"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\"
u"Installer\\UserData"_ns,
nsIWindowsRegKey::ACCESS_READ | nsIWindowsRegKey::WOW64_64))) {
mInstallerData.swap(regKey);
}
}
~InstalledApplications() = default;
InstalledApplications(InstalledApplications&&) = delete;
InstalledApplications& operator=(InstalledApplications&&) = delete;
InstalledApplications(const InstalledApplications&) = delete;
InstalledApplications& operator=(const InstalledApplications&) = delete;
void Collect(ComponentPathMapT& aOutComponentPaths,
nsTArray<InstallLocationT>& aOutLocations) {
const nsLiteralString kUninstallKey(
u"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall");
static const uint16_t sProcessor = []() -> uint16_t {
SYSTEM_INFO si;
::GetSystemInfo(&si);
return si.wProcessorArchitecture;
}();
nsresult rv;
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
if (NS_FAILED(rv)) {
return;
}
switch (sProcessor) {
case PROCESSOR_ARCHITECTURE_INTEL:
rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE,
kUninstallKey, nsIWindowsRegKey::ACCESS_READ);
if (NS_SUCCEEDED(rv)) {
EnumSubkeys(regKey, [this](const nsString& aProductId,
nsIWindowsRegKey* aProductSubKey) {
this->AddProduct(aProductId, aProductSubKey);
return CallbackResult::Continue;
});
}
break;
case PROCESSOR_ARCHITECTURE_AMD64:
// A 64-bit application may be installed by a 32-bit installer,
// or vice versa. So we enumerate both views regardless of
// the process's (not processor's) bitness.
rv = regKey->Open(
nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE, kUninstallKey,
nsIWindowsRegKey::ACCESS_READ | nsIWindowsRegKey::WOW64_64);
if (NS_SUCCEEDED(rv)) {
EnumSubkeys(regKey, [this](const nsString& aProductId,
nsIWindowsRegKey* aProductSubKey) {
this->AddProduct(aProductId, aProductSubKey);
return CallbackResult::Continue;
});
}
rv = regKey->Open(
nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE, kUninstallKey,
nsIWindowsRegKey::ACCESS_READ | nsIWindowsRegKey::WOW64_32);
if (NS_SUCCEEDED(rv)) {
EnumSubkeys(regKey, [this](const nsString& aProductId,
nsIWindowsRegKey* aProductSubKey) {
this->AddProduct(aProductId, aProductSubKey);
return CallbackResult::Continue;
});
}
break;
default:
MOZ_ASSERT(false, "Unsupported CPU architecture");
return;
}
// The "HKCU\SOFTWARE\" subtree is shared between the 32-bits and 64 bits
// views. No need to enumerate wow6432node for HKCU.
// https://docs.microsoft.com/en-us/windows/win32/winprog64/shared-registry-keys
rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER, kUninstallKey,
nsIWindowsRegKey::ACCESS_READ);
if (NS_SUCCEEDED(rv)) {
EnumSubkeys(regKey, [this](const nsString& aProductId,
nsIWindowsRegKey* aProductSubKey) {
this->AddProduct(aProductId, aProductSubKey);
return CallbackResult::Continue;
});
}
aOutComponentPaths.SwapElements(mComponentPaths);
mLocations.Sort([](const InstallLocationT& aA, const InstallLocationT& aB) {
return CompareIgnoreCase(aA.first(), aB.first());
});
aOutLocations.SwapElements(mLocations);
}
};
class KnownModule final {
static KnownModule sKnownExtensions[static_cast<int>(KnownModuleType::Last)];
static bool GetInprocServerDllPathFromGuid(const GUID& aGuid,
nsAString& aResult) {
nsAutoStringN<60> subkey;
subkey.AppendPrintf(
"CLSID\\{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\\"
"InProcServer32",
aGuid.Data1, aGuid.Data2, aGuid.Data3, aGuid.Data4[0], aGuid.Data4[1],
aGuid.Data4[2], aGuid.Data4[3], aGuid.Data4[4], aGuid.Data4[5],
aGuid.Data4[6], aGuid.Data4[7]);
nsresult rv;
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
if (NS_FAILED(rv)) {
return false;
}
rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT, subkey,
nsIWindowsRegKey::ACCESS_READ);
if (NS_FAILED(rv)) {
return false;
}
rv = regKey->ReadStringValue(u""_ns, aResult);
return NS_SUCCEEDED(rv);
}
enum class HandlerType {
// For this type of handler, multiple extensions can be registered as
// subkeys under the handler subkey.
Multi,
// For this type of handler, a single extension can be registered as
// the default value of the handler subkey.
Single,
};
HandlerType mHandlerType;
nsLiteralString mSubkeyName;
using CallbackT = std::function<void(const nsString&, KnownModuleType)>;
void EnumInternal(nsIWindowsRegKey* aRegBase, KnownModuleType aType,
const CallbackT& aCallback) const {
nsCOMPtr<nsIWindowsRegKey> shexType;
if (NS_FAILED(aRegBase->OpenChild(mSubkeyName,
nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(shexType)))) {
return;
}
switch (mHandlerType) {
case HandlerType::Single: {
nsAutoString valData;
GUID guid;
if (NS_FAILED(shexType->ReadStringValue(u""_ns, valData)) ||
FAILED(::CLSIDFromString(valData.get(), &guid))) {
return;
}
nsAutoString dllPath;
if (!GetInprocServerDllPathFromGuid(guid, dllPath)) {
return;
}
aCallback(dllPath, aType);
break;
}
case HandlerType::Multi:
EnumSubkeys(shexType, [aType, &aCallback](const nsString& aSubKeyName,
nsIWindowsRegKey* aSubKey) {
GUID guid;
HRESULT hr = ::CLSIDFromString(aSubKeyName.get(), &guid);
if (hr == CO_E_CLASSSTRING) {
// If the key's name is not a GUID, the default value of the key
// may be a GUID.
nsAutoString valData;
if (NS_SUCCEEDED(aSubKey->ReadStringValue(u""_ns, valData))) {
hr = ::CLSIDFromString(valData.get(), &guid);
}
}
if (FAILED(hr)) {
return CallbackResult::Continue;
}
nsAutoString dllPath;
if (!GetInprocServerDllPathFromGuid(guid, dllPath)) {
return CallbackResult::Continue;
}
aCallback(dllPath, aType);
return CallbackResult::Continue;
});
break;
default:
MOZ_ASSERT_UNREACHABLE("Unexpected KnownModule::Type.");
break;
}
}
static void Enum(nsIWindowsRegKey* aRegBase, KnownModuleType aType,
const CallbackT& aCallback) {
sKnownExtensions[static_cast<int>(aType)].EnumInternal(aRegBase, aType,
aCallback);
}
KnownModule(HandlerType aHandlerType, nsLiteralString aSubkeyName)
: mHandlerType(aHandlerType), mSubkeyName(aSubkeyName) {}
public:
static void EnumAll(const CallbackT& aCallback) {
nsresult rv;
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1", &rv);
if (NS_FAILED(rv)) {
return;
}
// Icon Overlay Handlers are registered under HKLM only.
// No need to look at HKCU.
rv = regKey->Open(
nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE,
u"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer"_ns,
nsIWindowsRegKey::ACCESS_READ);
if (NS_SUCCEEDED(rv)) {
Enum(regKey, KnownModuleType::IconOverlay, aCallback);
}
// IMEs can be enumerated by
// ITfInputProcessorProfiles::EnumInputProcessorInfo, but enumerating
// the registry key is easier.
// The "HKLM\Software\Microsoft\CTF\TIP" subtree is shared between
// the 32-bits and 64 bits views.
// https://docs.microsoft.com/en-us/windows/win32/winprog64/shared-registry-keys
// This logic cannot detect legacy (TSF-unaware) IMEs.
rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_LOCAL_MACHINE,
u"Software\\Microsoft\\CTF"_ns,
nsIWindowsRegKey::ACCESS_READ);
if (NS_SUCCEEDED(rv)) {
Enum(regKey, KnownModuleType::Ime, aCallback);
}
// Because HKCR is a merged view of HKLM\Software\Classes and
// HKCU\Software\Classes, looking at HKCR covers both per-machine
// and per-user extensions.
rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT, u""_ns,
nsIWindowsRegKey::ACCESS_READ);
if (NS_FAILED(rv)) {
return;
}
EnumSubkeys(regKey, [&aCallback](const nsString& aSubKeyName,
nsIWindowsRegKey* aSubKey) {
if (aSubKeyName.EqualsIgnoreCase("DesktopBackground") ||
aSubKeyName.EqualsIgnoreCase("AudioCD")) {
return CallbackResult::Continue;
}
if (aSubKeyName.EqualsIgnoreCase("Directory")) {
nsCOMPtr<nsIWindowsRegKey> regBackground;
if (NS_SUCCEEDED(aSubKey->OpenChild(u"Background\\shellex"_ns,
nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(regBackground)))) {
Enum(regBackground, KnownModuleType::ContextMenuHandler, aCallback);
}
} else if (aSubKeyName.EqualsIgnoreCase("Network")) {
nsCOMPtr<nsIWindowsRegKey> regNetworkTypes;
if (NS_SUCCEEDED(aSubKey->OpenChild(u"Type"_ns,
nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(regNetworkTypes)))) {
EnumSubkeys(
regNetworkTypes,
[&aCallback](const nsString&, nsIWindowsRegKey* aRegNetworkType) {
nsCOMPtr<nsIWindowsRegKey> regNetworkTypeShex;
if (NS_FAILED(aRegNetworkType->OpenChild(
u"shellex"_ns, nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(regNetworkTypeShex)))) {
return CallbackResult::Continue;
}
Enum(regNetworkTypeShex, KnownModuleType::ContextMenuHandler,
aCallback);
Enum(regNetworkTypeShex, KnownModuleType::PropertySheetHandler,
aCallback);
return CallbackResult::Continue;
});
}
}
nsCOMPtr<nsIWindowsRegKey> regShex;
if (NS_FAILED(aSubKey->OpenChild(u"shellex"_ns,
nsIWindowsRegKey::ACCESS_READ,
getter_AddRefs(regShex)))) {
return CallbackResult::Continue;
}
Enum(regShex, KnownModuleType::ContextMenuHandler, aCallback);
Enum(regShex, KnownModuleType::PropertySheetHandler, aCallback);
if (aSubKeyName.EqualsIgnoreCase("AllFileSystemObjects") ||
aSubKeyName.EqualsIgnoreCase("Network") ||
aSubKeyName.EqualsIgnoreCase("NetShare") ||
aSubKeyName.EqualsIgnoreCase("NetServer") ||
aSubKeyName.EqualsIgnoreCase("DVD")) {
return CallbackResult::Continue;
}
if (aSubKeyName.EqualsIgnoreCase("Directory")) {
Enum(regShex, KnownModuleType::CopyHookHandler, aCallback);
Enum(regShex, KnownModuleType::DragDropHandler, aCallback);
return CallbackResult::Continue;
} else if (aSubKeyName.EqualsIgnoreCase("Drive")) {
Enum(regShex, KnownModuleType::DragDropHandler, aCallback);
return CallbackResult::Continue;
} else if (aSubKeyName.EqualsIgnoreCase("Folder")) {
Enum(regShex, KnownModuleType::DragDropHandler, aCallback);
return CallbackResult::Continue;
} else if (aSubKeyName.EqualsIgnoreCase("Printers")) {
Enum(regShex, KnownModuleType::CopyHookHandler, aCallback);
return CallbackResult::Continue;
}
Enum(regShex, KnownModuleType::DataHandler, aCallback);
Enum(regShex, KnownModuleType::DropHandler, aCallback);
Enum(regShex, KnownModuleType::IconHandler, aCallback);
Enum(regShex, KnownModuleType::PropertyHandler, aCallback);
Enum(regShex, KnownModuleType::InfotipHandler, aCallback);
return CallbackResult::Continue;
});
}
KnownModule() = delete;
KnownModule(KnownModule&&) = delete;
KnownModule& operator=(KnownModule&&) = delete;
KnownModule(const KnownModule&) = delete;
KnownModule& operator=(const KnownModule&) = delete;
};
KnownModule KnownModule::sKnownExtensions[] = {
{HandlerType::Multi, u"TIP"_ns},
{HandlerType::Multi, u"ShellIconOverlayIdentifiers"_ns},
{HandlerType::Multi, u"ContextMenuHandlers"_ns},
{HandlerType::Multi, u"CopyHookHandlers"_ns},
{HandlerType::Multi, u"DragDropHandlers"_ns},
{HandlerType::Multi, u"PropertySheetHandlers"_ns},
{HandlerType::Single, u"DataHandler"_ns},
{HandlerType::Single, u"DropHandler"_ns},
{HandlerType::Single, u"IconHandler"_ns},
{HandlerType::Single, u"{00021500-0000-0000-C000-000000000046}"_ns},
{HandlerType::Single, u"PropertyHandler"_ns},
};
namespace mozilla {
static StaticRefPtr<AboutThirdParty> sSingleton;
NS_IMPL_ISUPPORTS(InstalledApplication, nsIInstalledApplication);
NS_IMPL_ISUPPORTS(AboutThirdParty, nsIAboutThirdParty);
InstalledApplication::InstalledApplication(nsString&& aAppName,
nsString&& aPublisher)
: mName(std::move(aAppName)), mPublisher(std::move(aPublisher)) {}
NS_IMETHODIMP
InstalledApplication::GetName(nsAString& aResult) {
aResult = mName;
return NS_OK;
}
NS_IMETHODIMP
InstalledApplication::GetPublisher(nsAString& aResult) {
aResult = mPublisher;
return NS_OK;
}
/*static*/
already_AddRefed<AboutThirdParty> AboutThirdParty::GetSingleton() {
if (!sSingleton) {
sSingleton = new AboutThirdParty;
ClearOnShutdown(&sSingleton);
}
return do_AddRef(sSingleton);
}
AboutThirdParty::AboutThirdParty()
: mPromise(new BackgroundThreadPromise::Private(__func__)) {}
void AboutThirdParty::AddKnownModule(const nsString& aPath,
KnownModuleType aType) {
MOZ_ASSERT(!NS_IsMainThread());
const uint32_t flag = 1u << static_cast<uint32_t>(aType);
mKnownModules.WithEntryHandle(nt::GetLeafName(aPath), [flag](auto&& addPtr) {
if (addPtr) {
addPtr.Data() |= flag;
} else {
addPtr.Insert(flag);
}
});
}
void AboutThirdParty::BackgroundThread() {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(mWorkerState == WorkerState::Running);
KnownModule::EnumAll(
[self = RefPtr{this}](const nsString& aDllPath, KnownModuleType aType) {
self->AddKnownModule(aDllPath, aType);
});
InstalledApplications apps;
apps.Collect(mComponentPaths, mLocations);
mWorkerState = WorkerState::Done;
}
NS_IMETHODIMP AboutThirdParty::LookupModuleType(const nsAString& aLeafName,
uint32_t* aResult) {
constexpr uint32_t kShellExtensions =
1u << static_cast<uint32_t>(KnownModuleType::IconOverlay) |
1u << static_cast<uint32_t>(KnownModuleType::ContextMenuHandler) |
1u << static_cast<uint32_t>(KnownModuleType::CopyHookHandler) |
1u << static_cast<uint32_t>(KnownModuleType::DragDropHandler) |
1u << static_cast<uint32_t>(KnownModuleType::PropertySheetHandler) |
1u << static_cast<uint32_t>(KnownModuleType::DataHandler) |
1u << static_cast<uint32_t>(KnownModuleType::DropHandler) |
1u << static_cast<uint32_t>(KnownModuleType::IconHandler) |
1u << static_cast<uint32_t>(KnownModuleType::InfotipHandler) |
1u << static_cast<uint32_t>(KnownModuleType::PropertyHandler);
MOZ_ASSERT(NS_IsMainThread());
*aResult = 0;
if (mWorkerState != WorkerState::Done) {
return NS_OK;
}
uint32_t flags;
if (!mKnownModules.Get(aLeafName, &flags)) {
*aResult = nsIAboutThirdParty::ModuleType_Unknown;
return NS_OK;
}
if (flags & (1u << static_cast<uint32_t>(KnownModuleType::Ime))) {
*aResult |= nsIAboutThirdParty::ModuleType_IME;
}
if (flags & kShellExtensions) {
*aResult |= nsIAboutThirdParty::ModuleType_ShellExtension;
}
return NS_OK;
}
NS_IMETHODIMP AboutThirdParty::LookupApplication(
const nsAString& aModulePath, nsIInstalledApplication** aResult) {
MOZ_ASSERT(NS_IsMainThread());
*aResult = nullptr;
if (mWorkerState != WorkerState::Done) {
return NS_OK;
}
const nsDependentSubstring leaf = nt::GetLeafName(aModulePath);
if (leaf.IsEmpty()) {
return NS_OK;
}
// Look up the component path's map first because it's more accurate
// than the location's array.
nsCOMPtr<nsIInstalledApplication> app = mComponentPaths.Get(aModulePath);
if (app) {
app.forget(aResult);
return NS_OK;
}
auto bounds = EqualRange(mLocations, 0, mLocations.Length(),
InstallLocationComparator(aModulePath));
// If more than one application includes the module, we return null
// because there is no way to know which is the real owner.
if (bounds.second() - bounds.first() != 1) {
return NS_OK;
}
app = mLocations[bounds.first()].second();
app.forget(aResult);
return NS_OK;
}
RefPtr<BackgroundThreadPromise> AboutThirdParty::CollectSystemInfoAsync() {
MOZ_ASSERT(NS_IsMainThread());
// Allow only the first call to start a background task.
if (mWorkerState.compareExchange(WorkerState::Init, WorkerState::Running)) {
nsCOMPtr<nsIRunnable> runnable = NS_NewRunnableFunction(
"AboutThirdParty::BackgroundThread", [self = RefPtr{this}]() mutable {
self->BackgroundThread();
NS_DispatchToMainThread(NS_NewRunnableFunction(
"AboutThirdParty::BackgroundThread Done",
[self]() { self->mPromise->Resolve(true, __func__); }));
});
nsresult rv =
NS_DispatchBackgroundTask(runnable.forget(), NS_DISPATCH_NORMAL);
if (NS_FAILED(rv)) {
mPromise->Reject(rv, __func__);
}
}
return mPromise;
}
NS_IMETHODIMP
AboutThirdParty::CollectSystemInfo(JSContext* aCx, dom::Promise** aResult) {
MOZ_ASSERT(NS_IsMainThread());
nsIGlobalObject* global = xpc::CurrentNativeGlobal(aCx);
MOZ_ASSERT(global);
ErrorResult result;
RefPtr<dom::Promise> promise(dom::Promise::Create(global, result));
if (NS_WARN_IF(result.Failed())) {
return result.StealNSResult();
}
CollectSystemInfoAsync()->Then(
GetMainThreadSerialEventTarget(), __func__,
[promise](bool) { promise->MaybeResolve(JS::NullHandleValue); },
[promise](nsresult aRv) { promise->MaybeReject(aRv); });
promise.forget(aResult);
return NS_OK;
}
} // namespace mozilla
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