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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sts=2 sw=2 et 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 "mozilla/dom/ContentParent.h"
#include "RegistryMessageUtils.h"
#include "nsResProtocolHandler.h"
#include "nsChromeRegistryChrome.h"
#if defined(XP_WIN)
# include <windows.h>
#elif defined(XP_MACOSX)
# include <CoreServices/CoreServices.h>
#endif
#include "nsArrayEnumerator.h"
#include "nsComponentManager.h"
#include "nsEnumeratorUtils.h"
#include "nsNetUtil.h"
#include "nsStringEnumerator.h"
#include "nsTextFormatter.h"
#include "nsXPCOMCIDInternal.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/Unused.h"
#include "nsIAppStartup.h"
#include "nsIObserverService.h"
#include "mozilla/Components.h"
#include "mozilla/Preferences.h"
#include "nsIResProtocolHandler.h"
#include "nsIScriptError.h"
#include "nsIXULRuntime.h"
#define PACKAGE_OVERRIDE_BRANCH "chrome.override_package."
#define SKIN "classic/1.0"_ns
using namespace mozilla;
using mozilla::dom::ContentParent;
using mozilla::dom::PContentParent;
using mozilla::intl::LocaleService;
// We use a "best-fit" algorithm for matching locales and themes.
// 1) the exact selected locale/theme
// 2) (locales only) same language, different country
// e.g. en-GB is the selected locale, only en-US is available
// 3) any available locale/theme
/**
* Match the language-part of two lang-COUNTRY codes, hopefully but
* not guaranteed to be in the form ab-CD or abz-CD. "ab" should also
* work, any other garbage-in will produce undefined results as long
* as it does not crash.
*/
static bool LanguagesMatch(const nsACString& a, const nsACString& b) {
if (a.Length() < 2 || b.Length() < 2) return false;
nsACString::const_iterator as, ae, bs, be;
a.BeginReading(as);
a.EndReading(ae);
b.BeginReading(bs);
b.EndReading(be);
while (*as == *bs) {
if (*as == '-') return true;
++as;
++bs;
// reached the end
if (as == ae && bs == be) return true;
// "a" is short
if (as == ae) return (*bs == '-');
// "b" is short
if (bs == be) return (*as == '-');
}
return false;
}
nsChromeRegistryChrome::nsChromeRegistryChrome()
: mProfileLoaded(false), mDynamicRegistration(true) {}
nsChromeRegistryChrome::~nsChromeRegistryChrome() {}
nsresult nsChromeRegistryChrome::Init() {
nsresult rv = nsChromeRegistry::Init();
if (NS_FAILED(rv)) return rv;
bool safeMode = false;
nsCOMPtr<nsIXULRuntime> xulrun(do_GetService(XULAPPINFO_SERVICE_CONTRACTID));
if (xulrun) xulrun->GetInSafeMode(&safeMode);
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
if (obsService) {
obsService->AddObserver(this, "profile-initial-state", true);
obsService->AddObserver(this, "intl:app-locales-changed", true);
}
return NS_OK;
}
NS_IMETHODIMP
nsChromeRegistryChrome::GetLocalesForPackage(
const nsACString& aPackage, nsIUTF8StringEnumerator** aResult) {
nsCString realpackage;
nsresult rv = OverrideLocalePackage(aPackage, realpackage);
if (NS_FAILED(rv)) return rv;
nsTArray<nsCString>* a = new nsTArray<nsCString>;
if (!a) return NS_ERROR_OUT_OF_MEMORY;
PackageEntry* entry;
if (mPackagesHash.Get(realpackage, &entry)) {
entry->locales.EnumerateToArray(a);
}
rv = NS_NewAdoptingUTF8StringEnumerator(aResult, a);
if (NS_FAILED(rv)) delete a;
return rv;
}
NS_IMETHODIMP
nsChromeRegistryChrome::IsLocaleRTL(const nsACString& package, bool* aResult) {
*aResult = false;
nsAutoCString locale;
GetSelectedLocale(package, locale);
if (locale.Length() < 2) return NS_OK;
*aResult = LocaleService::IsLocaleRTL(locale);
return NS_OK;
}
/**
* This method negotiates only between the app locale and the available
* chrome packages.
*
* If you want to get the current application's UI locale, please use
* LocaleService::GetAppLocaleAsBCP47.
*/
nsresult nsChromeRegistryChrome::GetSelectedLocale(const nsACString& aPackage,
nsACString& aLocale) {
nsAutoCString reqLocale;
if (aPackage.EqualsLiteral("global")) {
LocaleService::GetInstance()->GetAppLocaleAsBCP47(reqLocale);
} else {
AutoTArray<nsCString, 10> requestedLocales;
LocaleService::GetInstance()->GetRequestedLocales(requestedLocales);
reqLocale.Assign(requestedLocales[0]);
}
nsCString realpackage;
nsresult rv = OverrideLocalePackage(aPackage, realpackage);
if (NS_FAILED(rv)) return rv;
PackageEntry* entry;
if (!mPackagesHash.Get(realpackage, &entry)) return NS_ERROR_FILE_NOT_FOUND;
aLocale = entry->locales.GetSelected(reqLocale, nsProviderArray::LOCALE);
if (aLocale.IsEmpty()) return NS_ERROR_FAILURE;
return NS_OK;
}
nsresult nsChromeRegistryChrome::OverrideLocalePackage(
const nsACString& aPackage, nsACString& aOverride) {
const nsACString& pref = nsLiteralCString(PACKAGE_OVERRIDE_BRANCH) + aPackage;
nsAutoCString override;
nsresult rv = mozilla::Preferences::GetCString(PromiseFlatCString(pref).get(),
override);
if (NS_SUCCEEDED(rv)) {
aOverride = override;
} else {
aOverride = aPackage;
}
return NS_OK;
}
NS_IMETHODIMP
nsChromeRegistryChrome::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* someData) {
nsresult rv = NS_OK;
if (!strcmp("profile-initial-state", aTopic)) {
mProfileLoaded = true;
} else if (!strcmp("intl:app-locales-changed", aTopic)) {
if (mProfileLoaded) {
FlushAllCaches();
}
} else {
NS_ERROR("Unexpected observer topic!");
}
return rv;
}
NS_IMETHODIMP
nsChromeRegistryChrome::CheckForNewChrome() {
nsCOMPtr<nsIAppStartup> appStartup = components::AppStartup::Service();
if (appStartup->GetShuttingDown()) {
MOZ_ASSERT(false, "checking for new chrome during shutdown");
return NS_ERROR_UNEXPECTED;
}
mPackagesHash.Clear();
mOverrideTable.Clear();
mDynamicRegistration = false;
nsComponentManagerImpl::gComponentManager->RereadChromeManifests();
mDynamicRegistration = true;
SendRegisteredChrome(nullptr);
return NS_OK;
}
static void SerializeURI(nsIURI* aURI, SerializedURI& aSerializedURI) {
if (!aURI) return;
aURI->GetSpec(aSerializedURI.spec);
}
void nsChromeRegistryChrome::SendRegisteredChrome(
mozilla::dom::PContentParent* aParent) {
nsTArray<ChromePackage> packages;
nsTArray<SubstitutionMapping> resources;
nsTArray<OverrideMapping> overrides;
for (const auto& entry : mPackagesHash) {
ChromePackage chromePackage;
ChromePackageFromPackageEntry(entry.GetKey(), entry.GetWeak(),
&chromePackage, SKIN);
packages.AppendElement(chromePackage);
}
// If we were passed a parent then a new child process has been created and
// has requested all of the chrome so send it the resources too. Otherwise
// resource mappings are sent by the resource protocol handler dynamically.
if (aParent) {
nsCOMPtr<nsIIOService> io(do_GetIOService());
NS_ENSURE_TRUE_VOID(io);
nsCOMPtr<nsIProtocolHandler> ph;
nsresult rv = io->GetProtocolHandler("resource", getter_AddRefs(ph));
NS_ENSURE_SUCCESS_VOID(rv);
nsCOMPtr<nsIResProtocolHandler> irph(do_QueryInterface(ph));
nsResProtocolHandler* rph = static_cast<nsResProtocolHandler*>(irph.get());
rv = rph->CollectSubstitutions(resources);
NS_ENSURE_SUCCESS_VOID(rv);
}
for (const auto& entry : mOverrideTable) {
SerializedURI chromeURI, overrideURI;
SerializeURI(entry.GetKey(), chromeURI);
SerializeURI(entry.GetWeak(), overrideURI);
overrides.AppendElement(
OverrideMapping{std::move(chromeURI), std::move(overrideURI)});
}
nsAutoCString appLocale;
LocaleService::GetInstance()->GetAppLocaleAsBCP47(appLocale);
if (aParent) {
bool success = aParent->SendRegisterChrome(packages, resources, overrides,
appLocale, false);
NS_ENSURE_TRUE_VOID(success);
} else {
nsTArray<ContentParent*> parents;
ContentParent::GetAll(parents);
if (!parents.Length()) return;
for (uint32_t i = 0; i < parents.Length(); i++) {
DebugOnly<bool> success = parents[i]->SendRegisterChrome(
packages, resources, overrides, appLocale, true);
NS_WARNING_ASSERTION(success,
"couldn't reset a child's registered chrome");
}
}
}
/* static */
void nsChromeRegistryChrome::ChromePackageFromPackageEntry(
const nsACString& aPackageName, PackageEntry* aPackage,
ChromePackage* aChromePackage, const nsCString& aSelectedSkin) {
nsAutoCString appLocale;
LocaleService::GetInstance()->GetAppLocaleAsBCP47(appLocale);
SerializeURI(aPackage->baseURI, aChromePackage->contentBaseURI);
SerializeURI(aPackage->locales.GetBase(appLocale, nsProviderArray::LOCALE),
aChromePackage->localeBaseURI);
SerializeURI(aPackage->skins.GetBase(aSelectedSkin, nsProviderArray::ANY),
aChromePackage->skinBaseURI);
aChromePackage->package = aPackageName;
aChromePackage->flags = aPackage->flags;
}
static bool CanLoadResource(nsIURI* aResourceURI) {
bool isLocalResource = false;
(void)NS_URIChainHasFlags(aResourceURI,
nsIProtocolHandler::URI_IS_LOCAL_RESOURCE,
&isLocalResource);
return isLocalResource;
}
nsIURI* nsChromeRegistryChrome::GetBaseURIFromPackage(
const nsCString& aPackage, const nsCString& aProvider,
const nsCString& aPath) {
PackageEntry* entry;
if (!mPackagesHash.Get(aPackage, &entry)) {
if (!mInitialized) return nullptr;
LogMessage("No chrome package registered for chrome://%s/%s/%s",
aPackage.get(), aProvider.get(), aPath.get());
return nullptr;
}
if (aProvider.EqualsLiteral("locale")) {
nsAutoCString appLocale;
LocaleService::GetInstance()->GetAppLocaleAsLangTag(appLocale);
return entry->locales.GetBase(appLocale, nsProviderArray::LOCALE);
} else if (aProvider.EqualsLiteral("skin")) {
return entry->skins.GetBase(SKIN, nsProviderArray::ANY);
} else if (aProvider.EqualsLiteral("content")) {
return entry->baseURI;
}
return nullptr;
}
nsresult nsChromeRegistryChrome::GetFlagsFromPackage(const nsCString& aPackage,
uint32_t* aFlags) {
PackageEntry* entry;
if (!mPackagesHash.Get(aPackage, &entry)) return NS_ERROR_FILE_NOT_FOUND;
*aFlags = entry->flags;
return NS_OK;
}
nsChromeRegistryChrome::ProviderEntry*
nsChromeRegistryChrome::nsProviderArray::GetProvider(
const nsACString& aPreferred, MatchType aType) {
size_t i = mArray.Length();
if (!i) return nullptr;
ProviderEntry* found = nullptr; // Only set if we find a partial-match locale
ProviderEntry* entry = nullptr;
while (i--) {
entry = &mArray[i];
if (aPreferred.Equals(entry->provider)) return entry;
if (aType != LOCALE) continue;
if (LanguagesMatch(aPreferred, entry->provider)) {
found = entry;
continue;
}
if (!found && entry->provider.EqualsLiteral("en-US")) found = entry;
}
if (!found && aType != EXACT) return entry;
return found;
}
nsIURI* nsChromeRegistryChrome::nsProviderArray::GetBase(
const nsACString& aPreferred, MatchType aType) {
ProviderEntry* provider = GetProvider(aPreferred, aType);
if (!provider) return nullptr;
return provider->baseURI;
}
const nsACString& nsChromeRegistryChrome::nsProviderArray::GetSelected(
const nsACString& aPreferred, MatchType aType) {
ProviderEntry* entry = GetProvider(aPreferred, aType);
if (entry) return entry->provider;
return EmptyCString();
}
void nsChromeRegistryChrome::nsProviderArray::SetBase(
const nsACString& aProvider, nsIURI* aBaseURL) {
ProviderEntry* provider = GetProvider(aProvider, EXACT);
if (provider) {
provider->baseURI = aBaseURL;
return;
}
// no existing entries, add a new one
mArray.AppendElement(ProviderEntry(aProvider, aBaseURL));
}
void nsChromeRegistryChrome::nsProviderArray::EnumerateToArray(
nsTArray<nsCString>* a) {
int32_t i = mArray.Length();
while (i--) {
a->AppendElement(mArray[i].provider);
}
}
nsIURI* nsChromeRegistry::ManifestProcessingContext::GetManifestURI() {
if (!mManifestURI) {
nsCString uri;
mFile.GetURIString(uri);
NS_NewURI(getter_AddRefs(mManifestURI), uri);
}
return mManifestURI;
}
already_AddRefed<nsIURI>
nsChromeRegistry::ManifestProcessingContext::ResolveURI(const char* uri) {
nsIURI* baseuri = GetManifestURI();
if (!baseuri) return nullptr;
nsCOMPtr<nsIURI> resolved;
nsresult rv = NS_NewURI(getter_AddRefs(resolved), uri, baseuri);
if (NS_FAILED(rv)) return nullptr;
return resolved.forget();
}
static void EnsureLowerCase(char* aBuf) {
for (; *aBuf; ++aBuf) {
char ch = *aBuf;
if (ch >= 'A' && ch <= 'Z') *aBuf = ch + 'a' - 'A';
}
}
static void SendManifestEntry(const ChromeRegistryItem& aItem) {
nsTArray<ContentParent*> parents;
ContentParent::GetAll(parents);
if (!parents.Length()) return;
for (uint32_t i = 0; i < parents.Length(); i++) {
Unused << parents[i]->SendRegisterChromeItem(aItem);
}
}
void nsChromeRegistryChrome::ManifestContent(ManifestProcessingContext& cx,
int lineno, char* const* argv,
int flags) {
char* package = argv[0];
char* uri = argv[1];
EnsureLowerCase(package);
nsCOMPtr<nsIURI> resolved = cx.ResolveURI(uri);
if (!resolved) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"During chrome registration, unable to create URI '%s'.", uri);
return;
}
if (!CanLoadResource(resolved)) {
LogMessageWithContext(resolved, lineno, nsIScriptError::warningFlag,
"During chrome registration, cannot register "
"non-local URI '%s' as content.",
uri);
return;
}
nsDependentCString packageName(package);
PackageEntry* entry = mPackagesHash.GetOrInsertNew(packageName);
entry->baseURI = resolved;
entry->flags = flags;
if (mDynamicRegistration) {
ChromePackage chromePackage;
ChromePackageFromPackageEntry(packageName, entry, &chromePackage, SKIN);
SendManifestEntry(chromePackage);
}
}
void nsChromeRegistryChrome::ManifestLocale(ManifestProcessingContext& cx,
int lineno, char* const* argv,
int flags) {
char* package = argv[0];
char* provider = argv[1];
char* uri = argv[2];
EnsureLowerCase(package);
nsCOMPtr<nsIURI> resolved = cx.ResolveURI(uri);
if (!resolved) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"During chrome registration, unable to create URI '%s'.", uri);
return;
}
if (!CanLoadResource(resolved)) {
LogMessageWithContext(resolved, lineno, nsIScriptError::warningFlag,
"During chrome registration, cannot register "
"non-local URI '%s' as content.",
uri);
return;
}
nsDependentCString packageName(package);
PackageEntry* entry = mPackagesHash.GetOrInsertNew(packageName);
entry->locales.SetBase(nsDependentCString(provider), resolved);
if (mDynamicRegistration) {
ChromePackage chromePackage;
ChromePackageFromPackageEntry(packageName, entry, &chromePackage, SKIN);
SendManifestEntry(chromePackage);
}
// We use mainPackage as the package we track for reporting new locales being
// registered. For most cases it will be "global", but for Fennec it will be
// "browser".
nsAutoCString mainPackage;
nsresult rv = OverrideLocalePackage("global"_ns, mainPackage);
if (NS_FAILED(rv)) {
return;
}
}
void nsChromeRegistryChrome::ManifestSkin(ManifestProcessingContext& cx,
int lineno, char* const* argv,
int flags) {
char* package = argv[0];
char* provider = argv[1];
char* uri = argv[2];
EnsureLowerCase(package);
nsCOMPtr<nsIURI> resolved = cx.ResolveURI(uri);
if (!resolved) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"During chrome registration, unable to create URI '%s'.", uri);
return;
}
if (!CanLoadResource(resolved)) {
LogMessageWithContext(resolved, lineno, nsIScriptError::warningFlag,
"During chrome registration, cannot register "
"non-local URI '%s' as content.",
uri);
return;
}
nsDependentCString packageName(package);
PackageEntry* entry = mPackagesHash.GetOrInsertNew(packageName);
entry->skins.SetBase(nsDependentCString(provider), resolved);
if (mDynamicRegistration) {
ChromePackage chromePackage;
ChromePackageFromPackageEntry(packageName, entry, &chromePackage, SKIN);
SendManifestEntry(chromePackage);
}
}
void nsChromeRegistryChrome::ManifestOverride(ManifestProcessingContext& cx,
int lineno, char* const* argv,
int flags) {
char* chrome = argv[0];
char* resolved = argv[1];
nsCOMPtr<nsIURI> chromeuri = cx.ResolveURI(chrome);
nsCOMPtr<nsIURI> resolveduri = cx.ResolveURI(resolved);
if (!chromeuri || !resolveduri) {
LogMessageWithContext(cx.GetManifestURI(), lineno,
nsIScriptError::warningFlag,
"During chrome registration, unable to create URI.");
return;
}
if (cx.mType == NS_SKIN_LOCATION) {
bool chromeSkinOnly =
chromeuri->SchemeIs("chrome") && resolveduri->SchemeIs("chrome");
if (chromeSkinOnly) {
nsAutoCString chromePath, resolvedPath;
chromeuri->GetPathQueryRef(chromePath);
resolveduri->GetPathQueryRef(resolvedPath);
chromeSkinOnly = StringBeginsWith(chromePath, "/skin/"_ns) &&
StringBeginsWith(resolvedPath, "/skin/"_ns);
}
if (!chromeSkinOnly) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"Cannot register non-chrome://.../skin/ URIs '%s' and '%s' as "
"overrides and/or to be overridden from a skin manifest.",
chrome, resolved);
return;
}
}
if (!CanLoadResource(resolveduri)) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"Cannot register non-local URI '%s' for an override.", resolved);
return;
}
mOverrideTable.InsertOrUpdate(chromeuri, resolveduri);
if (mDynamicRegistration) {
SerializedURI serializedChrome;
SerializedURI serializedOverride;
SerializeURI(chromeuri, serializedChrome);
SerializeURI(resolveduri, serializedOverride);
OverrideMapping override = {serializedChrome, serializedOverride};
SendManifestEntry(override);
}
}
void nsChromeRegistryChrome::ManifestResource(ManifestProcessingContext& cx,
int lineno, char* const* argv,
int flags) {
char* package = argv[0];
char* uri = argv[1];
EnsureLowerCase(package);
nsDependentCString host(package);
nsCOMPtr<nsIIOService> io = mozilla::components::IO::Service();
if (!io) {
NS_WARNING("No IO service trying to process chrome manifests");
return;
}
nsCOMPtr<nsIProtocolHandler> ph;
nsresult rv = io->GetProtocolHandler("resource", getter_AddRefs(ph));
if (NS_FAILED(rv)) return;
nsCOMPtr<nsIResProtocolHandler> rph = do_QueryInterface(ph);
nsCOMPtr<nsIURI> resolved = cx.ResolveURI(uri);
if (!resolved) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"During chrome registration, unable to create URI '%s'.", uri);
return;
}
if (!CanLoadResource(resolved)) {
LogMessageWithContext(
cx.GetManifestURI(), lineno, nsIScriptError::warningFlag,
"Warning: cannot register non-local URI '%s' as a resource.", uri);
return;
}
// By default, Firefox resources are not content-accessible unless the
// manifests opts in.
bool contentAccessible = (flags & nsChromeRegistry::CONTENT_ACCESSIBLE);
uint32_t substitutionFlags = 0;
if (contentAccessible) {
substitutionFlags |= nsIResProtocolHandler::ALLOW_CONTENT_ACCESS;
}
rv = rph->SetSubstitutionWithFlags(host, resolved, substitutionFlags);
if (NS_FAILED(rv)) {
LogMessageWithContext(cx.GetManifestURI(), lineno,
nsIScriptError::warningFlag,
"Warning: cannot set substitution for '%s'.", uri);
}
}