diff options
Diffstat (limited to 'modules/libpref/nsPrefBranch.cpp')
| -rw-r--r-- | modules/libpref/nsPrefBranch.cpp | 943 |
1 files changed, 0 insertions, 943 deletions
diff --git a/modules/libpref/nsPrefBranch.cpp b/modules/libpref/nsPrefBranch.cpp deleted file mode 100644 index 6107e64d8..000000000 --- a/modules/libpref/nsPrefBranch.cpp +++ /dev/null @@ -1,943 +0,0 @@ -/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/* 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" - -#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::GetBoolPrefWithDefault(const char *aPrefName, - bool aDefaultValue, - uint8_t _argc, bool *_retval) -{ - nsresult rv = GetBoolPref(aPrefName, _retval); - - if (NS_FAILED(rv) && _argc == 1) { - *_retval = aDefaultValue; - return NS_OK; - } - - return rv; -} - -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::GetFloatPrefWithDefault(const char *aPrefName, - float aDefaultValue, - uint8_t _argc, float *_retval) -{ - nsresult rv = GetFloatPref(aPrefName, _retval); - - if (NS_FAILED(rv) && _argc == 1) { - *_retval = aDefaultValue; - return NS_OK; - } - - return rv; -} - -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::GetCharPrefWithDefault(const char *aPrefName, - const char *aDefaultValue, - uint8_t _argc, char **_retval) -{ - nsresult rv = GetCharPref(aPrefName, _retval); - - if (NS_FAILED(rv) && _argc == 1) { - NS_ENSURE_ARG(aDefaultValue); - *_retval = NS_strdup(aDefaultValue); - return NS_OK; - } - - 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::GetIntPrefWithDefault(const char *aPrefName, - int32_t aDefaultValue, - uint8_t _argc, int32_t *_retval) -{ - nsresult rv = GetIntPref(aPrefName, _retval); - - if (NS_FAILED(rv) && _argc == 1) { - *_retval = aDefaultValue; - return NS_OK; - } - - return rv; -} - -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)) { - 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 |