/* -*- 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 "mozilla/dom/ContentChild.h" #include "nsXULAppAPI.h" #include "nsPrefBranch.h" #include "nsILocalFile.h" // nsILocalFile used for backwards compatibility #include "nsIObserverService.h" #include "nsXPCOM.h" #include "nsISupportsPrimitives.h" #include "nsIDirectoryService.h" #include "nsString.h" #include "nsReadableUtils.h" #include "nsXPIDLString.h" #include "nsPrintfCString.h" #include "nsIStringBundle.h" #include "prefapi.h" #include "PLDHashTable.h" #include "nsCRT.h" #include "mozilla/Services.h" #include "prefapi_private_data.h" #ifdef MOZ_CRASHREPORTER #include "nsICrashReporter.h" #endif #include "nsIConsoleService.h" #ifdef DEBUG #define ENSURE_MAIN_PROCESS(message, pref) do { \ if (GetContentChild()) { \ nsPrintfCString msg("ENSURE_MAIN_PROCESS failed. %s %s", message, pref); \ NS_ERROR(msg.get()); \ return NS_ERROR_NOT_AVAILABLE; \ } \ } while (0); #else #define ENSURE_MAIN_PROCESS(message, pref) \ if (GetContentChild()) { \ return NS_ERROR_NOT_AVAILABLE; \ } #endif using mozilla::dom::ContentChild; static ContentChild* GetContentChild() { if (XRE_IsContentProcess()) { ContentChild* cpc = ContentChild::GetSingleton(); if (!cpc) { NS_RUNTIMEABORT("Content Protocol is NULL! We're going to crash!"); } return cpc; } return nullptr; } /* * Constructor/Destructor */ nsPrefBranch::nsPrefBranch(const char *aPrefRoot, bool aDefaultBranch) { mPrefRoot = aPrefRoot; mPrefRootLength = mPrefRoot.Length(); mIsDefault = aDefaultBranch; mFreeingObserverList = false; nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService(); if (observerService) { ++mRefCnt; // Our refcnt must be > 0 when we call this, or we'll get deleted! // add weak so we don't have to clean up at shutdown observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, true); --mRefCnt; } } nsPrefBranch::~nsPrefBranch() { freeObserverList(); nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService(); if (observerService) observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID); } /* * nsISupports Implementation */ NS_IMPL_ADDREF(nsPrefBranch) NS_IMPL_RELEASE(nsPrefBranch) NS_INTERFACE_MAP_BEGIN(nsPrefBranch) NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPrefBranch) NS_INTERFACE_MAP_ENTRY(nsIPrefBranch) NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIPrefBranch2, !mIsDefault) NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIPrefBranchInternal, !mIsDefault) NS_INTERFACE_MAP_ENTRY(nsIObserver) NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference) NS_INTERFACE_MAP_END /* * nsIPrefBranch Implementation */ NS_IMETHODIMP nsPrefBranch::GetRoot(char **aRoot) { NS_ENSURE_ARG_POINTER(aRoot); mPrefRoot.Truncate(mPrefRootLength); *aRoot = ToNewCString(mPrefRoot); return NS_OK; } NS_IMETHODIMP nsPrefBranch::GetPrefType(const char *aPrefName, int32_t *_retval) { NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); switch (PREF_GetPrefType(pref)) { case PrefType::String: *_retval = PREF_STRING; break; case PrefType::Int: *_retval = PREF_INT; break; case PrefType::Bool: *_retval = PREF_BOOL; break; case PrefType::Invalid: default: *_retval = PREF_INVALID; break; } return NS_OK; } NS_IMETHODIMP nsPrefBranch::GetBoolPref(const char *aPrefName, bool *_retval) { NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_GetBoolPref(pref, _retval, mIsDefault); } NS_IMETHODIMP nsPrefBranch::SetBoolPref(const char *aPrefName, bool aValue) { ENSURE_MAIN_PROCESS("Cannot SetBoolPref from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_SetBoolPref(pref, aValue, mIsDefault); } NS_IMETHODIMP nsPrefBranch::GetFloatPref(const char *aPrefName, float *_retval) { NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); nsAutoCString stringVal; nsresult rv = GetCharPref(pref, getter_Copies(stringVal)); if (NS_SUCCEEDED(rv)) { *_retval = stringVal.ToFloat(&rv); } return rv; } NS_IMETHODIMP nsPrefBranch::GetCharPref(const char *aPrefName, char **_retval) { NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_CopyCharPref(pref, _retval, mIsDefault); } NS_IMETHODIMP nsPrefBranch::SetCharPref(const char *aPrefName, const char *aValue) { nsresult rv = CheckSanityOfStringLength(aPrefName, aValue); if (NS_FAILED(rv)) { return rv; } return SetCharPrefInternal(aPrefName, aValue); } nsresult nsPrefBranch::SetCharPrefInternal(const char *aPrefName, const char *aValue) { ENSURE_MAIN_PROCESS("Cannot SetCharPref from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); NS_ENSURE_ARG(aValue); const char *pref = getPrefName(aPrefName); return PREF_SetCharPref(pref, aValue, mIsDefault); } NS_IMETHODIMP nsPrefBranch::GetIntPref(const char *aPrefName, int32_t *_retval) { NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_GetIntPref(pref, _retval, mIsDefault); } NS_IMETHODIMP nsPrefBranch::SetIntPref(const char *aPrefName, int32_t aValue) { ENSURE_MAIN_PROCESS("Cannot SetIntPref from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_SetIntPref(pref, aValue, mIsDefault); } NS_IMETHODIMP nsPrefBranch::GetComplexValue(const char *aPrefName, const nsIID & aType, void **_retval) { NS_ENSURE_ARG(aPrefName); nsresult rv; nsXPIDLCString utf8String; // we have to do this one first because it's different than all the rest if (aType.Equals(NS_GET_IID(nsIPrefLocalizedString))) { nsCOMPtr<nsIPrefLocalizedString> theString(do_CreateInstance(NS_PREFLOCALIZEDSTRING_CONTRACTID, &rv)); if (NS_FAILED(rv)) return rv; const char *pref = getPrefName(aPrefName); bool bNeedDefault = false; if (mIsDefault) { bNeedDefault = true; } else { // if there is no user (or locked) value if (!PREF_HasUserPref(pref) && !PREF_PrefIsLocked(pref)) { bNeedDefault = true; } } // if we need to fetch the default value, do that instead, otherwise use the // value we pulled in at the top of this function if (bNeedDefault) { nsXPIDLString utf16String; rv = GetDefaultFromPropertiesFile(pref, getter_Copies(utf16String)); if (NS_SUCCEEDED(rv)) { theString->SetData(utf16String.get()); } } else { rv = GetCharPref(aPrefName, getter_Copies(utf8String)); if (NS_SUCCEEDED(rv)) { theString->SetData(NS_ConvertUTF8toUTF16(utf8String).get()); } } if (NS_SUCCEEDED(rv)) { theString.forget(reinterpret_cast<nsIPrefLocalizedString**>(_retval)); } return rv; } // if we can't get the pref, there's no point in being here rv = GetCharPref(aPrefName, getter_Copies(utf8String)); if (NS_FAILED(rv)) { return rv; } // also check nsILocalFile, for backwards compatibility if (aType.Equals(NS_GET_IID(nsIFile)) || aType.Equals(NS_GET_IID(nsILocalFile))) { if (GetContentChild()) { NS_ERROR("cannot get nsIFile pref from content process"); return NS_ERROR_NOT_AVAILABLE; } nsCOMPtr<nsIFile> file(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv)); if (NS_SUCCEEDED(rv)) { rv = file->SetPersistentDescriptor(utf8String); if (NS_SUCCEEDED(rv)) { file.forget(reinterpret_cast<nsIFile**>(_retval)); return NS_OK; } } return rv; } if (aType.Equals(NS_GET_IID(nsIRelativeFilePref))) { if (GetContentChild()) { NS_ERROR("cannot get nsIRelativeFilePref from content process"); return NS_ERROR_NOT_AVAILABLE; } nsACString::const_iterator keyBegin, strEnd; utf8String.BeginReading(keyBegin); utf8String.EndReading(strEnd); // The pref has the format: [fromKey]a/b/c if (*keyBegin++ != '[') return NS_ERROR_FAILURE; nsACString::const_iterator keyEnd(keyBegin); if (!FindCharInReadable(']', keyEnd, strEnd)) return NS_ERROR_FAILURE; nsAutoCString key(Substring(keyBegin, keyEnd)); nsCOMPtr<nsIFile> fromFile; nsCOMPtr<nsIProperties> directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv)); if (NS_FAILED(rv)) return rv; rv = directoryService->Get(key.get(), NS_GET_IID(nsIFile), getter_AddRefs(fromFile)); if (NS_FAILED(rv)) return rv; nsCOMPtr<nsIFile> theFile; rv = NS_NewNativeLocalFile(EmptyCString(), true, getter_AddRefs(theFile)); if (NS_FAILED(rv)) return rv; rv = theFile->SetRelativeDescriptor(fromFile, Substring(++keyEnd, strEnd)); if (NS_FAILED(rv)) return rv; nsCOMPtr<nsIRelativeFilePref> relativePref; rv = NS_NewRelativeFilePref(theFile, key, getter_AddRefs(relativePref)); if (NS_FAILED(rv)) return rv; relativePref.forget(reinterpret_cast<nsIRelativeFilePref**>(_retval)); return NS_OK; } if (aType.Equals(NS_GET_IID(nsISupportsString))) { nsCOMPtr<nsISupportsString> theString(do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv)); if (NS_SUCCEEDED(rv)) { // Debugging to see why we end up with very long strings here with // some addons, see bug 836263. nsAutoString wdata; if (!AppendUTF8toUTF16(utf8String, wdata, mozilla::fallible)) { #ifdef MOZ_CRASHREPORTER nsCOMPtr<nsICrashReporter> cr = do_GetService("@mozilla.org/toolkit/crash-reporter;1"); if (cr) { cr->AnnotateCrashReport(NS_LITERAL_CSTRING("bug836263-size"), nsPrintfCString("%x", utf8String.Length())); cr->RegisterAppMemory(uint64_t(utf8String.BeginReading()), std::min(0x1000U, utf8String.Length())); } #endif NS_RUNTIMEABORT("bug836263"); } theString->SetData(wdata); theString.forget(reinterpret_cast<nsISupportsString**>(_retval)); } return rv; } NS_WARNING("nsPrefBranch::GetComplexValue - Unsupported interface type"); return NS_NOINTERFACE; } nsresult nsPrefBranch::CheckSanityOfStringLength(const char* aPrefName, const char* aValue) { if (!aValue) { return NS_OK; } return CheckSanityOfStringLength(aPrefName, strlen(aValue)); } nsresult nsPrefBranch::CheckSanityOfStringLength(const char* aPrefName, const nsAString& aValue) { return CheckSanityOfStringLength(aPrefName, aValue.Length()); } nsresult nsPrefBranch::CheckSanityOfStringLength(const char* aPrefName, const uint32_t aLength) { if (aLength > MAX_PREF_LENGTH) { return NS_ERROR_ILLEGAL_VALUE; } if (aLength <= MAX_ADVISABLE_PREF_LENGTH) { return NS_OK; } nsresult rv; nsCOMPtr<nsIConsoleService> console = do_GetService("@mozilla.org/consoleservice;1", &rv); if (NS_FAILED(rv)) { return rv; } nsAutoCString message(nsPrintfCString("Warning: attempting to write %d bytes to preference %s. This is bad " "for general performance and memory usage. Such an amount of data " "should rather be written to an external file. This preference will " "not be sent to any content processes.", aLength, getPrefName(aPrefName))); rv = console->LogStringMessage(NS_ConvertUTF8toUTF16(message).get()); if (NS_FAILED(rv)) { return rv; } return NS_OK; } /*static*/ void nsPrefBranch::ReportToConsole(const nsAString& aMessage) { nsresult rv; nsCOMPtr<nsIConsoleService> console = do_GetService("@mozilla.org/consoleservice;1", &rv); if (NS_FAILED(rv)) { return; } nsAutoString message(aMessage); console->LogStringMessage(message.get()); } NS_IMETHODIMP nsPrefBranch::SetComplexValue(const char *aPrefName, const nsIID & aType, nsISupports *aValue) { ENSURE_MAIN_PROCESS("Cannot SetComplexValue from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); nsresult rv = NS_NOINTERFACE; // also check nsILocalFile, for backwards compatibility if (aType.Equals(NS_GET_IID(nsIFile)) || aType.Equals(NS_GET_IID(nsILocalFile))) { nsCOMPtr<nsIFile> file = do_QueryInterface(aValue); if (!file) return NS_NOINTERFACE; nsAutoCString descriptorString; rv = file->GetPersistentDescriptor(descriptorString); if (NS_SUCCEEDED(rv)) { rv = SetCharPrefInternal(aPrefName, descriptorString.get()); } return rv; } if (aType.Equals(NS_GET_IID(nsIRelativeFilePref))) { nsCOMPtr<nsIRelativeFilePref> relFilePref = do_QueryInterface(aValue); if (!relFilePref) return NS_NOINTERFACE; nsCOMPtr<nsIFile> file; relFilePref->GetFile(getter_AddRefs(file)); if (!file) return NS_NOINTERFACE; nsAutoCString relativeToKey; (void) relFilePref->GetRelativeToKey(relativeToKey); nsCOMPtr<nsIFile> relativeToFile; nsCOMPtr<nsIProperties> directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv)); if (NS_FAILED(rv)) return rv; rv = directoryService->Get(relativeToKey.get(), NS_GET_IID(nsIFile), getter_AddRefs(relativeToFile)); if (NS_FAILED(rv)) return rv; nsAutoCString relDescriptor; rv = file->GetRelativeDescriptor(relativeToFile, relDescriptor); if (NS_FAILED(rv)) return rv; nsAutoCString descriptorString; descriptorString.Append('['); descriptorString.Append(relativeToKey); descriptorString.Append(']'); descriptorString.Append(relDescriptor); return SetCharPrefInternal(aPrefName, descriptorString.get()); } if (aType.Equals(NS_GET_IID(nsISupportsString))) { nsCOMPtr<nsISupportsString> theString = do_QueryInterface(aValue); if (theString) { nsString wideString; rv = theString->GetData(wideString); if (NS_SUCCEEDED(rv)) { // Check sanity of string length before any lengthy conversion rv = CheckSanityOfStringLength(aPrefName, wideString); if (NS_FAILED(rv)) { return rv; } rv = SetCharPrefInternal(aPrefName, NS_ConvertUTF16toUTF8(wideString).get()); } } return rv; } if (aType.Equals(NS_GET_IID(nsIPrefLocalizedString))) { nsCOMPtr<nsIPrefLocalizedString> theString = do_QueryInterface(aValue); if (theString) { nsXPIDLString wideString; rv = theString->GetData(getter_Copies(wideString)); if (NS_SUCCEEDED(rv)) { // Check sanity of string length before any lengthy conversion rv = CheckSanityOfStringLength(aPrefName, wideString); if (NS_FAILED(rv)) { return rv; } rv = SetCharPrefInternal(aPrefName, NS_ConvertUTF16toUTF8(wideString).get()); } } return rv; } NS_WARNING("nsPrefBranch::SetComplexValue - Unsupported interface type"); return NS_NOINTERFACE; } NS_IMETHODIMP nsPrefBranch::ClearUserPref(const char *aPrefName) { ENSURE_MAIN_PROCESS("Cannot ClearUserPref from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_ClearUserPref(pref); } NS_IMETHODIMP nsPrefBranch::PrefHasUserValue(const char *aPrefName, bool *_retval) { NS_ENSURE_ARG_POINTER(_retval); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); *_retval = PREF_HasUserPref(pref); return NS_OK; } NS_IMETHODIMP nsPrefBranch::LockPref(const char *aPrefName) { ENSURE_MAIN_PROCESS("Cannot LockPref from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_LockPref(pref, true); } NS_IMETHODIMP nsPrefBranch::PrefIsLocked(const char *aPrefName, bool *_retval) { ENSURE_MAIN_PROCESS("Cannot check PrefIsLocked from content process:", aPrefName); NS_ENSURE_ARG_POINTER(_retval); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); *_retval = PREF_PrefIsLocked(pref); return NS_OK; } NS_IMETHODIMP nsPrefBranch::UnlockPref(const char *aPrefName) { ENSURE_MAIN_PROCESS("Cannot UnlockPref from content process:", aPrefName); NS_ENSURE_ARG(aPrefName); const char *pref = getPrefName(aPrefName); return PREF_LockPref(pref, false); } NS_IMETHODIMP nsPrefBranch::ResetBranch(const char *aStartingAt) { return NS_ERROR_NOT_IMPLEMENTED; } NS_IMETHODIMP nsPrefBranch::DeleteBranch(const char *aStartingAt) { ENSURE_MAIN_PROCESS("Cannot DeleteBranch from content process:", aStartingAt); NS_ENSURE_ARG(aStartingAt); const char *pref = getPrefName(aStartingAt); return PREF_DeleteBranch(pref); } NS_IMETHODIMP nsPrefBranch::GetChildList(const char *aStartingAt, uint32_t *aCount, char ***aChildArray) { char **outArray; int32_t numPrefs; int32_t dwIndex; AutoTArray<nsCString, 32> prefArray; NS_ENSURE_ARG(aStartingAt); NS_ENSURE_ARG_POINTER(aCount); NS_ENSURE_ARG_POINTER(aChildArray); *aChildArray = nullptr; *aCount = 0; // this will contain a list of all the pref name strings // allocate on the stack for speed const char* parent = getPrefName(aStartingAt); size_t parentLen = strlen(parent); for (auto iter = gHashTable->Iter(); !iter.Done(); iter.Next()) { auto entry = static_cast<PrefHashEntry*>(iter.Get()); if (strncmp(entry->key, parent, parentLen) == 0) { prefArray.AppendElement(entry->key); } } // now that we've built up the list, run the callback on // all the matching elements numPrefs = prefArray.Length(); if (numPrefs) { outArray = (char **)moz_xmalloc(numPrefs * sizeof(char *)); if (!outArray) return NS_ERROR_OUT_OF_MEMORY; for (dwIndex = 0; dwIndex < numPrefs; ++dwIndex) { // we need to lop off mPrefRoot in case the user is planning to pass this // back to us because if they do we are going to add mPrefRoot again. const nsCString& element = prefArray[dwIndex]; outArray[dwIndex] = (char *)nsMemory::Clone( element.get() + mPrefRootLength, element.Length() - mPrefRootLength + 1); if (!outArray[dwIndex]) { // we ran out of memory... this is annoying NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(dwIndex, outArray); return NS_ERROR_OUT_OF_MEMORY; } } *aChildArray = outArray; } *aCount = numPrefs; return NS_OK; } NS_IMETHODIMP nsPrefBranch::AddObserver(const char *aDomain, nsIObserver *aObserver, bool aHoldWeak) { PrefCallback *pCallback; const char *pref; NS_ENSURE_ARG(aDomain); NS_ENSURE_ARG(aObserver); // hold a weak reference to the observer if so requested if (aHoldWeak) { nsCOMPtr<nsISupportsWeakReference> weakRefFactory = do_QueryInterface(aObserver); if (!weakRefFactory) { // the caller didn't give us a object that supports weak reference... tell them return NS_ERROR_INVALID_ARG; } // Construct a PrefCallback with a weak reference to the observer. pCallback = new PrefCallback(aDomain, weakRefFactory, this); } else { // Construct a PrefCallback with a strong reference to the observer. pCallback = new PrefCallback(aDomain, aObserver, this); } if (mObservers.Get(pCallback)) { NS_WARNING("Ignoring duplicate observer."); delete pCallback; return NS_OK; } mObservers.Put(pCallback, pCallback); // We must pass a fully qualified preference name to the callback // aDomain == nullptr is the only possible failure, and we trapped it with // NS_ENSURE_ARG above. pref = getPrefName(aDomain); PREF_RegisterCallback(pref, NotifyObserver, pCallback); return NS_OK; } NS_IMETHODIMP nsPrefBranch::RemoveObserver(const char *aDomain, nsIObserver *aObserver) { NS_ENSURE_ARG(aDomain); NS_ENSURE_ARG(aObserver); nsresult rv = NS_OK; // If we're in the middle of a call to freeObserverList, don't process this // RemoveObserver call -- the observer in question will be removed soon, if // it hasn't been already. // // It's important that we don't touch mObservers in any way -- even a Get() // which returns null might cause the hashtable to resize itself, which will // break the iteration in freeObserverList. if (mFreeingObserverList) return NS_OK; // Remove the relevant PrefCallback from mObservers and get an owning // pointer to it. Unregister the callback first, and then let the owning // pointer go out of scope and destroy the callback. PrefCallback key(aDomain, aObserver, this); nsAutoPtr<PrefCallback> pCallback; mObservers.RemoveAndForget(&key, pCallback); if (pCallback) { // aDomain == nullptr is the only possible failure, trapped above const char *pref = getPrefName(aDomain); rv = PREF_UnregisterCallback(pref, NotifyObserver, pCallback); } return rv; } NS_IMETHODIMP nsPrefBranch::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *someData) { // watch for xpcom shutdown and free our observers to eliminate any cyclic references if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) { freeObserverList(); } return NS_OK; } /* static */ void nsPrefBranch::NotifyObserver(const char *newpref, void *data) { PrefCallback *pCallback = (PrefCallback *)data; nsCOMPtr<nsIObserver> observer = pCallback->GetObserver(); if (!observer) { // The observer has expired. Let's remove this callback. pCallback->GetPrefBranch()->RemoveExpiredCallback(pCallback); return; } // remove any root this string may contain so as to not confuse the observer // by passing them something other than what they passed us as a topic uint32_t len = pCallback->GetPrefBranch()->GetRootLength(); nsAutoCString suffix(newpref + len); observer->Observe(static_cast<nsIPrefBranch *>(pCallback->GetPrefBranch()), NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, NS_ConvertASCIItoUTF16(suffix).get()); } size_t nsPrefBranch::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) { size_t n = aMallocSizeOf(this); n += mPrefRoot.SizeOfExcludingThisIfUnshared(aMallocSizeOf); n += mObservers.ShallowSizeOfExcludingThis(aMallocSizeOf); return n; } void nsPrefBranch::freeObserverList(void) { // We need to prevent anyone from modifying mObservers while we're iterating // over it. In particular, some clients will call RemoveObserver() when // they're removed and destructed via the iterator; we set // mFreeingObserverList to keep those calls from touching mObservers. mFreeingObserverList = true; for (auto iter = mObservers.Iter(); !iter.Done(); iter.Next()) { nsAutoPtr<PrefCallback>& callback = iter.Data(); nsPrefBranch *prefBranch = callback->GetPrefBranch(); const char *pref = prefBranch->getPrefName(callback->GetDomain().get()); PREF_UnregisterCallback(pref, nsPrefBranch::NotifyObserver, callback); iter.Remove(); } mFreeingObserverList = false; } void nsPrefBranch::RemoveExpiredCallback(PrefCallback *aCallback) { NS_PRECONDITION(aCallback->IsExpired(), "Callback should be expired."); mObservers.Remove(aCallback); } nsresult nsPrefBranch::GetDefaultFromPropertiesFile(const char *aPrefName, char16_t **return_buf) { nsresult rv; // the default value contains a URL to a .properties file nsXPIDLCString propertyFileURL; rv = PREF_CopyCharPref(aPrefName, getter_Copies(propertyFileURL), true); if (NS_FAILED(rv)) return rv; nsCOMPtr<nsIStringBundleService> bundleService = mozilla::services::GetStringBundleService(); if (!bundleService) return NS_ERROR_FAILURE; nsCOMPtr<nsIStringBundle> bundle; rv = bundleService->CreateBundle(propertyFileURL, getter_AddRefs(bundle)); if (NS_FAILED(rv)) return rv; // string names are in unicode nsAutoString stringId; stringId.AssignASCII(aPrefName); return bundle->GetStringFromName(stringId.get(), return_buf); } const char *nsPrefBranch::getPrefName(const char *aPrefName) { NS_ASSERTION(aPrefName, "null pref name!"); // for speed, avoid strcpy if we can: if (mPrefRoot.IsEmpty()) return aPrefName; // isn't there a better way to do this? this is really kind of gross. mPrefRoot.Truncate(mPrefRootLength); mPrefRoot.Append(aPrefName); return mPrefRoot.get(); } //---------------------------------------------------------------------------- // nsPrefLocalizedString //---------------------------------------------------------------------------- nsPrefLocalizedString::nsPrefLocalizedString() { } nsPrefLocalizedString::~nsPrefLocalizedString() { } /* * nsISupports Implementation */ NS_IMPL_ADDREF(nsPrefLocalizedString) NS_IMPL_RELEASE(nsPrefLocalizedString) NS_INTERFACE_MAP_BEGIN(nsPrefLocalizedString) NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPrefLocalizedString) NS_INTERFACE_MAP_ENTRY(nsIPrefLocalizedString) NS_INTERFACE_MAP_ENTRY(nsISupportsString) NS_INTERFACE_MAP_END nsresult nsPrefLocalizedString::Init() { nsresult rv; mUnicodeString = do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv); return rv; } NS_IMETHODIMP nsPrefLocalizedString::GetData(char16_t **_retval) { nsAutoString data; nsresult rv = GetData(data); if (NS_FAILED(rv)) return rv; *_retval = ToNewUnicode(data); if (!*_retval) return NS_ERROR_OUT_OF_MEMORY; return NS_OK; } NS_IMETHODIMP nsPrefLocalizedString::SetData(const char16_t *aData) { if (!aData) return SetData(EmptyString()); return SetData(nsDependentString(aData)); } NS_IMETHODIMP nsPrefLocalizedString::SetDataWithLength(uint32_t aLength, const char16_t *aData) { if (!aData) return SetData(EmptyString()); return SetData(Substring(aData, aLength)); } //---------------------------------------------------------------------------- // nsRelativeFilePref //---------------------------------------------------------------------------- NS_IMPL_ISUPPORTS(nsRelativeFilePref, nsIRelativeFilePref) nsRelativeFilePref::nsRelativeFilePref() { } nsRelativeFilePref::~nsRelativeFilePref() { } NS_IMETHODIMP nsRelativeFilePref::GetFile(nsIFile **aFile) { NS_ENSURE_ARG_POINTER(aFile); *aFile = mFile; NS_IF_ADDREF(*aFile); return NS_OK; } NS_IMETHODIMP nsRelativeFilePref::SetFile(nsIFile *aFile) { mFile = aFile; return NS_OK; } NS_IMETHODIMP nsRelativeFilePref::GetRelativeToKey(nsACString& aRelativeToKey) { aRelativeToKey.Assign(mRelativeToKey); return NS_OK; } NS_IMETHODIMP nsRelativeFilePref::SetRelativeToKey(const nsACString& aRelativeToKey) { mRelativeToKey.Assign(aRelativeToKey); return NS_OK; } #undef ENSURE_MAIN_PROCESS