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nsChromeRegistry.cpp
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nsChromeRegistry.cpp
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* 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 "nsChromeRegistry.h"
#include "nsChromeRegistryChrome.h"
#include "nsChromeRegistryContent.h"
#include "nsCOMPtr.h"
#include "nsError.h"
#include "nsEscape.h"
#include "nsNetUtil.h"
#include "nsString.h"
#include "nsQueryObject.h"
#include "mozilla/dom/URL.h"
#include "nsDOMWindowList.h"
#include "nsIConsoleService.h"
#include "mozilla/dom/Document.h"
#include "nsIDOMWindow.h"
#include "nsIObserverService.h"
#include "nsIScriptError.h"
#include "nsIWindowMediator.h"
#include "nsIPrefService.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/Printf.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/StyleSheetInlines.h"
#include "mozilla/dom/Location.h"
#include "nsIURIMutator.h"
#include "unicode/uloc.h"
nsChromeRegistry* nsChromeRegistry::gChromeRegistry;
// DO NOT use namespace mozilla; it'll break due to a naming conflict between
// mozilla::TextRange and a TextRange in OSX headers.
using mozilla::PresShell;
using mozilla::StyleSheet;
using mozilla::dom::Document;
using mozilla::dom::Location;
////////////////////////////////////////////////////////////////////////////////
void nsChromeRegistry::LogMessage(const char* aMsg, ...) {
nsCOMPtr<nsIConsoleService> console(
do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (!console) return;
va_list args;
va_start(args, aMsg);
mozilla::SmprintfPointer formatted = mozilla::Vsmprintf(aMsg, args);
va_end(args);
if (!formatted) return;
console->LogStringMessage(NS_ConvertUTF8toUTF16(formatted.get()).get());
}
void nsChromeRegistry::LogMessageWithContext(nsIURI* aURL, uint32_t aLineNumber,
uint32_t flags, const char* aMsg,
...) {
nsresult rv;
nsCOMPtr<nsIConsoleService> console(
do_GetService(NS_CONSOLESERVICE_CONTRACTID));
nsCOMPtr<nsIScriptError> error(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));
if (!console || !error) return;
va_list args;
va_start(args, aMsg);
mozilla::SmprintfPointer formatted = mozilla::Vsmprintf(aMsg, args);
va_end(args);
if (!formatted) return;
nsCString spec;
if (aURL) aURL->GetSpec(spec);
rv = error->Init(
NS_ConvertUTF8toUTF16(formatted.get()), NS_ConvertUTF8toUTF16(spec),
EmptyString(), aLineNumber, 0, flags, "chrome registration",
false /* from private window */, true /* from chrome context */);
if (NS_FAILED(rv)) return;
console->LogMessage(error);
}
nsChromeRegistry::~nsChromeRegistry() { gChromeRegistry = nullptr; }
NS_INTERFACE_MAP_BEGIN(nsChromeRegistry)
NS_INTERFACE_MAP_ENTRY(nsIChromeRegistry)
NS_INTERFACE_MAP_ENTRY(nsIXULChromeRegistry)
NS_INTERFACE_MAP_ENTRY(nsIToolkitChromeRegistry)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIChromeRegistry)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsChromeRegistry)
NS_IMPL_RELEASE(nsChromeRegistry)
////////////////////////////////////////////////////////////////////////////////
// nsIChromeRegistry methods:
already_AddRefed<nsIChromeRegistry> nsChromeRegistry::GetService() {
if (!gChromeRegistry) {
// We don't actually want this ref, we just want the service to
// initialize if it hasn't already.
nsCOMPtr<nsIChromeRegistry> reg(
do_GetService(NS_CHROMEREGISTRY_CONTRACTID));
if (!gChromeRegistry) return nullptr;
}
nsCOMPtr<nsIChromeRegistry> registry = gChromeRegistry;
return registry.forget();
}
nsresult nsChromeRegistry::Init() {
// This initialization process is fairly complicated and may cause reentrant
// getservice calls to resolve chrome URIs (especially locale files). We
// don't want that, so we inform the protocol handler about our existence
// before we are actually fully initialized.
gChromeRegistry = this;
mInitialized = true;
return NS_OK;
}
nsresult nsChromeRegistry::GetProviderAndPath(nsIURI* aChromeURL,
nsACString& aProvider,
nsACString& aPath) {
nsresult rv;
#ifdef DEBUG
bool isChrome;
aChromeURL->SchemeIs("chrome", &isChrome);
NS_ASSERTION(isChrome, "Non-chrome URI?");
#endif
nsAutoCString path;
rv = aChromeURL->GetPathQueryRef(path);
NS_ENSURE_SUCCESS(rv, rv);
if (path.Length() < 3) {
LogMessage("Invalid chrome URI: %s", path.get());
return NS_ERROR_FAILURE;
}
path.SetLength(nsUnescapeCount(path.BeginWriting()));
NS_ASSERTION(path.First() == '/', "Path should always begin with a slash!");
int32_t slash = path.FindChar('/', 1);
if (slash == 1) {
LogMessage("Invalid chrome URI: %s", path.get());
return NS_ERROR_FAILURE;
}
if (slash == -1) {
aPath.Truncate();
} else {
if (slash == (int32_t)path.Length() - 1)
aPath.Truncate();
else
aPath.Assign(path.get() + slash + 1, path.Length() - slash - 1);
--slash;
}
aProvider.Assign(path.get() + 1, slash);
return NS_OK;
}
nsresult nsChromeRegistry::Canonify(nsCOMPtr<nsIURI>& aChromeURL) {
NS_NAMED_LITERAL_CSTRING(kSlash, "/");
nsresult rv;
nsAutoCString provider, path;
rv = GetProviderAndPath(aChromeURL, provider, path);
NS_ENSURE_SUCCESS(rv, rv);
if (path.IsEmpty()) {
nsAutoCString package;
rv = aChromeURL->GetHost(package);
NS_ENSURE_SUCCESS(rv, rv);
// we re-use the "path" local string to build a new URL path
path.Assign(kSlash + provider + kSlash + package);
if (provider.EqualsLiteral("content")) {
path.AppendLiteral(".xul");
} else if (provider.EqualsLiteral("locale")) {
path.AppendLiteral(".dtd");
} else if (provider.EqualsLiteral("skin")) {
path.AppendLiteral(".css");
} else {
return NS_ERROR_INVALID_ARG;
}
return NS_MutateURI(aChromeURL).SetPathQueryRef(path).Finalize(aChromeURL);
} else {
// prevent directory traversals ("..")
// path is already unescaped once, but uris can get unescaped twice
const char* pos = path.BeginReading();
const char* end = path.EndReading();
// Must start with [a-zA-Z0-9].
if (!('a' <= *pos && *pos <= 'z') && !('A' <= *pos && *pos <= 'Z') &&
!('0' <= *pos && *pos <= '9')) {
return NS_ERROR_DOM_BAD_URI;
}
while (pos < end) {
switch (*pos) {
case ':':
return NS_ERROR_DOM_BAD_URI;
case '.':
if (pos[1] == '.') return NS_ERROR_DOM_BAD_URI;
break;
case '%':
// chrome: URIs with double-escapes are trying to trick us.
// watch for %2e, and %25 in case someone triple unescapes
if (pos[1] == '2' &&
(pos[2] == 'e' || pos[2] == 'E' || pos[2] == '5'))
return NS_ERROR_DOM_BAD_URI;
break;
case '?':
case '#':
pos = end;
continue;
}
++pos;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsChromeRegistry::ConvertChromeURL(nsIURI* aChromeURI, nsIURI** aResult) {
nsresult rv;
if (NS_WARN_IF(!aChromeURI)) {
return NS_ERROR_INVALID_ARG;
}
if (mOverrideTable.Get(aChromeURI, aResult)) return NS_OK;
nsCOMPtr<nsIURL> chromeURL(do_QueryInterface(aChromeURI));
NS_ENSURE_TRUE(chromeURL, NS_NOINTERFACE);
nsAutoCString package, provider, path;
rv = chromeURL->GetHostPort(package);
NS_ENSURE_SUCCESS(rv, rv);
rv = GetProviderAndPath(chromeURL, provider, path);
NS_ENSURE_SUCCESS(rv, rv);
nsIURI* baseURI = GetBaseURIFromPackage(package, provider, path);
uint32_t flags;
rv = GetFlagsFromPackage(package, &flags);
if (NS_FAILED(rv)) return rv;
if (!baseURI) {
LogMessage("No chrome package registered for chrome://%s/%s/%s",
package.get(), provider.get(), path.get());
return NS_ERROR_FILE_NOT_FOUND;
}
return NS_NewURI(aResult, path, nullptr, baseURI);
}
////////////////////////////////////////////////////////////////////////
void nsChromeRegistry::FlushAllCaches() {
nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
NS_ASSERTION(obsSvc, "Couldn't get observer service.");
obsSvc->NotifyObservers((nsIChromeRegistry*)this, NS_CHROME_FLUSH_TOPIC,
nullptr);
}
NS_IMETHODIMP
nsChromeRegistry::AllowScriptsForPackage(nsIURI* aChromeURI, bool* aResult) {
nsresult rv;
*aResult = false;
#ifdef DEBUG
bool isChrome;
aChromeURI->SchemeIs("chrome", &isChrome);
NS_ASSERTION(isChrome, "Non-chrome URI passed to AllowScriptsForPackage!");
#endif
nsCOMPtr<nsIURL> url(do_QueryInterface(aChromeURI));
NS_ENSURE_TRUE(url, NS_NOINTERFACE);
nsAutoCString provider, file;
rv = GetProviderAndPath(url, provider, file);
NS_ENSURE_SUCCESS(rv, rv);
if (!provider.EqualsLiteral("skin")) *aResult = true;
return NS_OK;
}
NS_IMETHODIMP
nsChromeRegistry::AllowContentToAccess(nsIURI* aURI, bool* aResult) {
nsresult rv;
*aResult = false;
#ifdef DEBUG
bool isChrome;
aURI->SchemeIs("chrome", &isChrome);
NS_ASSERTION(isChrome, "Non-chrome URI passed to AllowContentToAccess!");
#endif
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
if (!url) {
NS_ERROR("Chrome URL doesn't implement nsIURL.");
return NS_ERROR_UNEXPECTED;
}
nsAutoCString package;
rv = url->GetHostPort(package);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t flags;
rv = GetFlagsFromPackage(package, &flags);
if (NS_SUCCEEDED(rv)) {
*aResult = !!(flags & CONTENT_ACCESSIBLE);
}
return NS_OK;
}
NS_IMETHODIMP
nsChromeRegistry::CanLoadURLRemotely(nsIURI* aURI, bool* aResult) {
nsresult rv;
*aResult = false;
#ifdef DEBUG
bool isChrome;
aURI->SchemeIs("chrome", &isChrome);
NS_ASSERTION(isChrome, "Non-chrome URI passed to CanLoadURLRemotely!");
#endif
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
if (!url) {
NS_ERROR("Chrome URL doesn't implement nsIURL.");
return NS_ERROR_UNEXPECTED;
}
nsAutoCString package;
rv = url->GetHostPort(package);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t flags;
rv = GetFlagsFromPackage(package, &flags);
if (NS_SUCCEEDED(rv)) {
*aResult = !!(flags & REMOTE_ALLOWED);
}
return NS_OK;
}
NS_IMETHODIMP
nsChromeRegistry::MustLoadURLRemotely(nsIURI* aURI, bool* aResult) {
nsresult rv;
*aResult = false;
#ifdef DEBUG
bool isChrome;
aURI->SchemeIs("chrome", &isChrome);
NS_ASSERTION(isChrome, "Non-chrome URI passed to MustLoadURLRemotely!");
#endif
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
if (!url) {
NS_ERROR("Chrome URL doesn't implement nsIURL.");
return NS_ERROR_UNEXPECTED;
}
nsAutoCString package;
rv = url->GetHostPort(package);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t flags;
rv = GetFlagsFromPackage(package, &flags);
if (NS_SUCCEEDED(rv)) {
*aResult = !!(flags & REMOTE_REQUIRED);
}
return NS_OK;
}
bool nsChromeRegistry::GetDirectionForLocale(const nsACString& aLocale) {
int pref = mozilla::Preferences::GetInt("intl.uidirection", -1);
if (pref >= 0) {
return (pref > 0);
}
nsAutoCString locale(aLocale);
SanitizeForBCP47(locale);
return uloc_isRightToLeft(locale.get());
}
already_AddRefed<nsChromeRegistry> nsChromeRegistry::GetSingleton() {
if (gChromeRegistry) {
RefPtr<nsChromeRegistry> registry = gChromeRegistry;
return registry.forget();
}
RefPtr<nsChromeRegistry> cr;
if (GeckoProcessType_Content == XRE_GetProcessType())
cr = new nsChromeRegistryContent();
else
cr = new nsChromeRegistryChrome();
if (NS_FAILED(cr->Init())) return nullptr;
return cr.forget();
}
void nsChromeRegistry::SanitizeForBCP47(nsACString& aLocale) {
// Currently, the only locale code we use that's not BCP47-conformant is
// "ja-JP-mac" on OS X, but let's try to be more general than just
// hard-coding that here.
const int32_t LANG_TAG_CAPACITY = 128;
char langTag[LANG_TAG_CAPACITY];
nsAutoCString locale(aLocale);
UErrorCode err = U_ZERO_ERROR;
// This is a fail-safe method that will set langTag to "und" if it cannot
// match any part of the input locale code.
int32_t len =
uloc_toLanguageTag(locale.get(), langTag, LANG_TAG_CAPACITY, false, &err);
if (U_SUCCESS(err) && len > 0) {
aLocale.Assign(langTag, len);
}
}