Issue #1829 - Revert “Issue #1751 - Remove Mac code behind MOZ_WIDGET_TOOLKIT == 'cocoa’”

This reverts commit 1fe9c19305dadf2d5bcaa0e589fcd250389dfa8a.

9 files changed, 748 insertions, 0 deletions

diff --git a/intl/locale/mac/moz.build b/intl/locale/mac/moz.build
new file mode 100644
index 0000000000..422fd3e3cd
--- /dev/null
+++ b/intl/locale/mac/moz.build
@@ -0,0 +1,15 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# 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/.
+
+UNIFIED_SOURCES += [
+    'nsCollationMacUC.cpp',
+    'nsDateTimeFormatMac.cpp',
+    'nsMacCharset.cpp',
+]
+
+FINAL_LIBRARY = 'xul'
+LOCAL_INCLUDES += [
+    '..',
+]
diff --git a/intl/locale/mac/nsCollationMacUC.cpp b/intl/locale/mac/nsCollationMacUC.cpp
new file mode 100644
index 0000000000..d230f4d771
--- /dev/null
+++ b/intl/locale/mac/nsCollationMacUC.cpp
@@ -0,0 +1,253 @@
+/* -*- Mode: C++; tab-width: 2; 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 "nsCollationMacUC.h"
+#include "nsILocaleService.h"
+#include "nsIPrefBranch.h"
+#include "nsIPrefService.h"
+#include "nsIServiceManager.h"
+#include "prmem.h"
+#include "nsString.h"
+
+NS_IMPL_ISUPPORTS(nsCollationMacUC, nsICollation)
+
+nsCollationMacUC::nsCollationMacUC()
+  : mInit(false)
+  , mHasCollator(false)
+  , mLocaleICU(nullptr)
+  , mLastStrength(-1)
+  , mCollatorICU(nullptr)
+{ }
+
+nsCollationMacUC::~nsCollationMacUC()
+{
+#ifdef DEBUG
+  nsresult res =
+#endif
+    CleanUpCollator();
+  NS_ASSERTION(NS_SUCCEEDED(res), "CleanUpCollator failed");
+  if (mLocaleICU) {
+    free(mLocaleICU);
+    mLocaleICU = nullptr;
+  }
+}
+
+nsresult nsCollationMacUC::ConvertStrength(const int32_t aNSStrength,
+                                           UCollationStrength* aICUStrength,
+                                           UColAttributeValue* aCaseLevelOut)
+{
+  NS_ENSURE_ARG_POINTER(aICUStrength);
+  NS_ENSURE_TRUE((aNSStrength < 4), NS_ERROR_FAILURE);
+
+  UCollationStrength strength = UCOL_DEFAULT;
+  UColAttributeValue caseLevel = UCOL_OFF;
+  switch (aNSStrength) {
+    case kCollationCaseInSensitive:
+      strength = UCOL_PRIMARY;
+      break;
+    case kCollationCaseInsensitiveAscii:
+      strength = UCOL_SECONDARY;
+      break;
+    case kCollationAccentInsenstive:
+      caseLevel = UCOL_ON;
+      strength = UCOL_PRIMARY;
+      break;
+    case kCollationCaseSensitive:
+      strength = UCOL_TERTIARY;
+      break;
+    default:
+      NS_WARNING("Bad aNSStrength passed to ConvertStrength.");
+      return NS_ERROR_FAILURE;
+  }
+
+  *aICUStrength = strength;
+  *aCaseLevelOut = caseLevel;
+
+  return NS_OK;
+}
+
+nsresult nsCollationMacUC::ConvertLocaleICU(nsILocale* aNSLocale, char** aICULocale)
+{
+  NS_ENSURE_ARG_POINTER(aNSLocale);
+  NS_ENSURE_ARG_POINTER(aICULocale);
+
+  nsAutoString localeString;
+  nsresult res = aNSLocale->GetCategory(NS_LITERAL_STRING("NSILOCALE_COLLATE"), localeString);
+  NS_ENSURE_TRUE(NS_SUCCEEDED(res) && !localeString.IsEmpty(),
+                 NS_ERROR_FAILURE);
+  NS_LossyConvertUTF16toASCII tmp(localeString);
+  tmp.ReplaceChar('-', '_');
+  char* locale = (char*)malloc(tmp.Length() + 1);
+  if (!locale) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  strcpy(locale, tmp.get());
+
+  *aICULocale = locale;
+
+  return NS_OK;
+}
+
+nsresult nsCollationMacUC::EnsureCollator(const int32_t newStrength)
+{
+  NS_ENSURE_TRUE(mInit, NS_ERROR_NOT_INITIALIZED);
+  if (mHasCollator && (mLastStrength == newStrength))
+    return NS_OK;
+
+  nsresult res;
+  res = CleanUpCollator();
+  NS_ENSURE_SUCCESS(res, res);
+
+  NS_ENSURE_TRUE(mLocaleICU, NS_ERROR_NOT_INITIALIZED);
+
+  UErrorCode status;
+  status = U_ZERO_ERROR;
+  mCollatorICU = ucol_open(mLocaleICU, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+
+  UCollationStrength strength;
+  UColAttributeValue caseLevel;
+  res = ConvertStrength(newStrength, &strength, &caseLevel);
+  NS_ENSURE_SUCCESS(res, res);
+
+  status = U_ZERO_ERROR;
+  ucol_setAttribute(mCollatorICU, UCOL_STRENGTH, strength, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+  ucol_setAttribute(mCollatorICU, UCOL_CASE_LEVEL, caseLevel, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+  ucol_setAttribute(mCollatorICU, UCOL_ALTERNATE_HANDLING, UCOL_DEFAULT, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+  ucol_setAttribute(mCollatorICU, UCOL_NUMERIC_COLLATION, UCOL_OFF, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+  ucol_setAttribute(mCollatorICU, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+  ucol_setAttribute(mCollatorICU, UCOL_CASE_FIRST, UCOL_DEFAULT, &status);
+  NS_ENSURE_TRUE(U_SUCCESS(status), NS_ERROR_FAILURE);
+
+  mHasCollator = true;
+
+  mLastStrength = newStrength;
+  return NS_OK;
+}
+
+nsresult nsCollationMacUC::CleanUpCollator(void)
+{
+  if (mHasCollator) {
+    ucol_close(mCollatorICU);
+    mHasCollator = false;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsCollationMacUC::Initialize(nsILocale* locale) 
+{
+  NS_ENSURE_TRUE((!mInit), NS_ERROR_ALREADY_INITIALIZED);
+  nsCOMPtr<nsILocale> appLocale;
+
+  nsresult rv;
+  if (!locale) {
+    nsCOMPtr<nsILocaleService> localeService = do_GetService(NS_LOCALESERVICE_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+    rv = localeService->GetApplicationLocale(getter_AddRefs(appLocale));
+    NS_ENSURE_SUCCESS(rv, rv);
+    locale = appLocale;
+  }
+
+  rv = ConvertLocaleICU(locale, &mLocaleICU);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  mInit = true;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsCollationMacUC::AllocateRawSortKey(int32_t strength, const nsAString& stringIn,
+                                                   uint8_t** key, uint32_t* outLen)
+{
+  NS_ENSURE_TRUE(mInit, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_ARG_POINTER(key);
+  NS_ENSURE_ARG_POINTER(outLen);
+
+  nsresult res = EnsureCollator(strength);
+  NS_ENSURE_SUCCESS(res, res);
+
+  uint32_t stringInLen = stringIn.Length();
+
+  const UChar* str = (const UChar*)stringIn.BeginReading();
+
+  int32_t keyLength = ucol_getSortKey(mCollatorICU, str, stringInLen, nullptr, 0);
+  NS_ENSURE_TRUE((stringInLen == 0 || keyLength > 0), NS_ERROR_FAILURE);
+
+  // Since key is freed elsewhere with PR_Free, allocate with PR_Malloc.
+  uint8_t* newKey = (uint8_t*)PR_Malloc(keyLength + 1);
+  if (!newKey) {
+      return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  keyLength = ucol_getSortKey(mCollatorICU, str, stringInLen, newKey, keyLength + 1);
+  NS_ENSURE_TRUE((stringInLen == 0 || keyLength > 0), NS_ERROR_FAILURE);
+
+  *key = newKey;
+  *outLen = keyLength;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsCollationMacUC::CompareString(int32_t strength, const nsAString& string1,
+                                              const nsAString& string2, int32_t* result)
+{
+  NS_ENSURE_TRUE(mInit, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_ARG_POINTER(result);
+  *result = 0;
+
+  nsresult rv = EnsureCollator(strength);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  UCollationResult uresult;
+  uresult = ucol_strcoll(mCollatorICU,
+                         (const UChar*)string1.BeginReading(),
+                         string1.Length(),
+                         (const UChar*)string2.BeginReading(),
+                         string2.Length());
+  int32_t res;
+  switch (uresult) {
+    case UCOL_LESS:
+      res = -1;
+      break;
+    case UCOL_EQUAL:
+      res = 0;
+      break;
+    case UCOL_GREATER:
+      res = 1;
+      break;
+    default:
+      MOZ_CRASH("ucol_strcoll returned bad UCollationResult");
+  }
+  *result = res;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsCollationMacUC::CompareRawSortKey(const uint8_t* key1, uint32_t len1,
+                                                  const uint8_t* key2, uint32_t len2,
+                                                  int32_t* result)
+{
+  NS_ENSURE_TRUE(mInit, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_ARG_POINTER(key1);
+  NS_ENSURE_ARG_POINTER(key2);
+  NS_ENSURE_ARG_POINTER(result);
+  *result = 0;
+
+  int32_t tmpResult = strcmp((const char*)key1, (const char*)key2);
+  int32_t res;
+  if (tmpResult < 0) {
+      res = -1;
+  } else if (tmpResult > 0) {
+      res = 1;
+  } else {
+      res = 0;
+  }
+  *result = res;
+  return NS_OK;
+}
diff --git a/intl/locale/mac/nsCollationMacUC.h b/intl/locale/mac/nsCollationMacUC.h
new file mode 100644
index 0000000000..46bb0145de
--- /dev/null
+++ b/intl/locale/mac/nsCollationMacUC.h
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#ifndef nsCollationMacUC_h_
+#define nsCollationMacUC_h_
+
+#include "nsICollation.h"
+#include "nsCollation.h"
+#include "mozilla/Attributes.h"
+
+#include "unicode/ucol.h"
+
+class nsCollationMacUC final : public nsICollation {
+
+public:
+  nsCollationMacUC();
+
+  // nsISupports interface
+  NS_DECL_ISUPPORTS
+
+  // nsICollation interface
+  NS_DECL_NSICOLLATION
+
+protected:
+  ~nsCollationMacUC();
+
+  nsresult ConvertLocaleICU(nsILocale* aNSLocale, char** aICULocale);
+  nsresult ConvertStrength(const int32_t aStrength,
+                           UCollationStrength* aStrengthOut,
+                           UColAttributeValue* aCaseLevelOut);
+  nsresult EnsureCollator(const int32_t newStrength);
+  nsresult CleanUpCollator(void);
+
+private:
+  bool mInit;
+  bool mHasCollator;
+  char* mLocaleICU;
+  int32_t mLastStrength;
+  UCollator* mCollatorICU;
+};
+
+#endif  /* nsCollationMacUC_h_ */
diff --git a/intl/locale/mac/nsDateTimeFormatMac.cpp b/intl/locale/mac/nsDateTimeFormatMac.cpp
new file mode 100644
index 0000000000..6ee73292d7
--- /dev/null
+++ b/intl/locale/mac/nsDateTimeFormatMac.cpp
@@ -0,0 +1,266 @@
+/* -*- Mode: C++; tab-width: 2; 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 <CoreFoundation/CoreFoundation.h>
+#include "nsIServiceManager.h"
+#include "nsDateTimeFormatMac.h"
+#include <CoreFoundation/CFDateFormatter.h>
+#include "nsIComponentManager.h"
+#include "nsILocaleService.h"
+#include "nsCRT.h"
+#include "plstr.h"
+#include "nsUnicharUtils.h"
+#include "nsTArray.h"
+
+
+NS_IMPL_ISUPPORTS(nsDateTimeFormatMac, nsIDateTimeFormat)
+
+nsresult nsDateTimeFormatMac::Initialize(nsILocale* locale)
+{
+  nsAutoString localeStr;
+  nsAutoString category(NS_LITERAL_STRING("NSILOCALE_TIME"));
+  nsresult res;
+
+  // use cached info if match with stored locale
+  if (nullptr == locale) {
+    if (!mLocale.IsEmpty() &&
+        mLocale.Equals(mAppLocale, nsCaseInsensitiveStringComparator())) {
+      return NS_OK;
+    }
+  }
+  else {
+    res = locale->GetCategory(category, localeStr);
+    if (NS_SUCCEEDED(res) && !localeStr.IsEmpty()) {
+      if (!mLocale.IsEmpty() &&
+          mLocale.Equals(localeStr,
+                         nsCaseInsensitiveStringComparator())) {
+        return NS_OK;
+      }
+    }
+  }
+
+  // get application locale
+  nsCOMPtr<nsILocaleService> localeService = 
+           do_GetService(NS_LOCALESERVICE_CONTRACTID, &res);
+  if (NS_SUCCEEDED(res)) {
+    nsCOMPtr<nsILocale> appLocale;
+    res = localeService->GetApplicationLocale(getter_AddRefs(appLocale));
+    if (NS_SUCCEEDED(res)) {
+      res = appLocale->GetCategory(category, localeStr);
+      if (NS_SUCCEEDED(res) && !localeStr.IsEmpty()) {
+        mAppLocale = localeStr; // cache app locale name
+      }
+    }
+  }
+  
+  // use app default if no locale specified
+  if (nullptr == locale) {
+    mUseDefaultLocale = true;
+  }
+  else {
+    mUseDefaultLocale = false;
+    res = locale->GetCategory(category, localeStr);
+  }
+    
+  if (NS_SUCCEEDED(res) && !localeStr.IsEmpty()) {
+    mLocale.Assign(localeStr); // cache locale name
+  }
+
+  return res;
+}
+
+// performs a locale sensitive date formatting operation on the time_t parameter
+nsresult nsDateTimeFormatMac::FormatTime(nsILocale* locale, 
+                                      const nsDateFormatSelector  dateFormatSelector, 
+                                      const nsTimeFormatSelector timeFormatSelector, 
+                                      const time_t  timetTime, 
+                                      nsAString& stringOut)
+{
+  struct tm tmTime;
+  return FormatTMTime(locale, dateFormatSelector, timeFormatSelector, localtime_r(&timetTime, &tmTime), stringOut);
+}
+
+// performs a locale sensitive date formatting operation on the struct tm parameter
+nsresult nsDateTimeFormatMac::FormatTMTime(nsILocale* locale, 
+                                           const nsDateFormatSelector  dateFormatSelector, 
+                                           const nsTimeFormatSelector timeFormatSelector, 
+                                           const struct tm*  tmTime, 
+                                           nsAString& stringOut)
+{
+  nsresult res = NS_OK;
+
+  // set up locale data
+  (void) Initialize(locale);
+  
+  // return, nothing to format
+  if (dateFormatSelector == kDateFormatNone && timeFormatSelector == kTimeFormatNone) {
+    stringOut.Truncate();
+    return NS_OK;
+  }
+
+  NS_ASSERTION(tmTime->tm_mon >= 0, "tm is not set correctly");
+  NS_ASSERTION(tmTime->tm_mday >= 1, "tm is not set correctly");
+  NS_ASSERTION(tmTime->tm_hour >= 0, "tm is not set correctly");
+  NS_ASSERTION(tmTime->tm_min >= 0, "tm is not set correctly");
+  NS_ASSERTION(tmTime->tm_sec >= 0, "tm is not set correctly");
+  NS_ASSERTION(tmTime->tm_wday >= 0, "tm is not set correctly");
+
+  // Got the locale for the formatter:
+  CFLocaleRef formatterLocale;
+  if (!locale) {
+    formatterLocale = CFLocaleCopyCurrent();
+  } else {
+    CFStringRef localeStr = CFStringCreateWithCharacters(nullptr,
+                                                         reinterpret_cast<const UniChar*>(mLocale.get()),
+                                                         mLocale.Length());
+    formatterLocale = CFLocaleCreate(nullptr, localeStr);
+    CFRelease(localeStr);
+  }
+
+  // Get the date style for the formatter:  
+  CFDateFormatterStyle dateStyle;
+  switch (dateFormatSelector) {
+    case kDateFormatLong:
+      dateStyle = kCFDateFormatterLongStyle;
+      break;
+    case kDateFormatShort:
+      dateStyle = kCFDateFormatterShortStyle;
+      break;
+    case kDateFormatYearMonth:
+    case kDateFormatWeekday:
+      dateStyle = kCFDateFormatterNoStyle; // formats handled below
+      break;
+    case kDateFormatNone:
+      dateStyle = kCFDateFormatterNoStyle;
+      break;
+    default:
+      NS_ERROR("Unknown nsDateFormatSelector");
+      res = NS_ERROR_FAILURE;
+      dateStyle = kCFDateFormatterNoStyle;
+  }
+  
+  // Get the time style for the formatter:
+  CFDateFormatterStyle timeStyle;
+  switch (timeFormatSelector) {
+    case kTimeFormatSeconds:
+    case kTimeFormatSecondsForce24Hour: // 24 hour part fixed below
+      timeStyle = kCFDateFormatterMediumStyle;
+      break;
+    case kTimeFormatNoSeconds:
+    case kTimeFormatNoSecondsForce24Hour: // 24 hour part fixed below
+      timeStyle = kCFDateFormatterShortStyle;
+      break;
+    case kTimeFormatNone:
+      timeStyle = kCFDateFormatterNoStyle;
+      break;
+    default:
+      NS_ERROR("Unknown nsTimeFormatSelector");
+      res = NS_ERROR_FAILURE;
+      timeStyle = kCFDateFormatterNoStyle;
+  }
+  
+  // Create the formatter and fix up its formatting as necessary:
+  CFDateFormatterRef formatter =
+    CFDateFormatterCreate(nullptr, formatterLocale, dateStyle, timeStyle);
+  
+  CFRelease(formatterLocale);
+  
+  if (dateFormatSelector == kDateFormatYearMonth ||
+      dateFormatSelector == kDateFormatWeekday) {
+    CFStringRef dateFormat =
+      dateFormatSelector == kDateFormatYearMonth ? CFSTR("yyyy/MM ") : CFSTR("EEE ");
+    
+    CFStringRef oldFormat = CFDateFormatterGetFormat(formatter);
+    CFMutableStringRef newFormat = CFStringCreateMutableCopy(nullptr, 0, oldFormat);
+    CFStringInsert(newFormat, 0, dateFormat);
+    CFDateFormatterSetFormat(formatter, newFormat);
+    CFRelease(newFormat); // note we don't own oldFormat
+  }
+  
+  if (timeFormatSelector == kTimeFormatSecondsForce24Hour ||
+      timeFormatSelector == kTimeFormatNoSecondsForce24Hour) {
+    // Replace "h" with "H", and remove "a":
+    CFStringRef oldFormat = CFDateFormatterGetFormat(formatter);
+    CFMutableStringRef newFormat = CFStringCreateMutableCopy(nullptr, 0, oldFormat);
+    CFIndex replaceCount = CFStringFindAndReplace(newFormat,
+                                                  CFSTR("h"), CFSTR("H"),
+                                                  CFRangeMake(0, CFStringGetLength(newFormat)),	
+                                                  0);
+    NS_ASSERTION(replaceCount <= 2, "Unexpected number of \"h\" occurrences");
+    replaceCount = CFStringFindAndReplace(newFormat,
+                                          CFSTR("a"), CFSTR(""),
+                                          CFRangeMake(0, CFStringGetLength(newFormat)),	
+                                          0);
+    NS_ASSERTION(replaceCount <= 1, "Unexpected number of \"a\" occurrences");
+    CFDateFormatterSetFormat(formatter, newFormat);
+    CFRelease(newFormat); // note we don't own oldFormat
+  }
+  
+  // Now get the formatted date:
+  CFGregorianDate date;
+  date.second = tmTime->tm_sec;
+  date.minute = tmTime->tm_min;
+  date.hour = tmTime->tm_hour;
+  date.day = tmTime->tm_mday;      // Mac is 1-based, tm is 1-based
+  date.month = tmTime->tm_mon + 1; // Mac is 1-based, tm is 0-based
+  date.year = tmTime->tm_year + 1900;
+
+  CFTimeZoneRef timeZone = CFTimeZoneCopySystem(); // tmTime is in local time
+  CFAbsoluteTime absTime = CFGregorianDateGetAbsoluteTime(date, timeZone);
+  CFRelease(timeZone);
+
+  CFStringRef formattedDate = CFDateFormatterCreateStringWithAbsoluteTime(nullptr,
+                                                                          formatter,
+                                                                          absTime);
+
+  CFIndex stringLen = CFStringGetLength(formattedDate);
+
+  AutoTArray<UniChar, 256> stringBuffer;
+  stringBuffer.SetLength(stringLen + 1);
+  CFStringGetCharacters(formattedDate, CFRangeMake(0, stringLen), stringBuffer.Elements());
+  stringOut.Assign(reinterpret_cast<char16_t*>(stringBuffer.Elements()), stringLen);
+
+  CFRelease(formattedDate);
+  CFRelease(formatter);
+
+  return res;
+}
+
+// performs a locale sensitive date formatting operation on the PRTime parameter
+nsresult nsDateTimeFormatMac::FormatPRTime(nsILocale* locale, 
+                                           const nsDateFormatSelector  dateFormatSelector, 
+                                           const nsTimeFormatSelector timeFormatSelector, 
+                                           const PRTime  prTime, 
+                                           nsAString& stringOut)
+{
+  PRExplodedTime explodedTime;
+  PR_ExplodeTime(prTime, PR_LocalTimeParameters, &explodedTime);
+
+  return FormatPRExplodedTime(locale, dateFormatSelector, timeFormatSelector, &explodedTime, stringOut);
+}
+
+// performs a locale sensitive date formatting operation on the PRExplodedTime parameter
+nsresult nsDateTimeFormatMac::FormatPRExplodedTime(nsILocale* locale, 
+                                                   const nsDateFormatSelector  dateFormatSelector, 
+                                                   const nsTimeFormatSelector timeFormatSelector, 
+                                                   const PRExplodedTime*  explodedTime, 
+                                                   nsAString& stringOut)
+{
+  struct tm  tmTime;
+  memset( &tmTime, 0, sizeof(tmTime) );
+
+  tmTime.tm_yday = explodedTime->tm_yday;
+  tmTime.tm_wday = explodedTime->tm_wday;
+  tmTime.tm_year = explodedTime->tm_year;
+  tmTime.tm_year -= 1900;
+  tmTime.tm_mon = explodedTime->tm_month;
+  tmTime.tm_mday = explodedTime->tm_mday;
+  tmTime.tm_hour = explodedTime->tm_hour;
+  tmTime.tm_min = explodedTime->tm_min;
+  tmTime.tm_sec = explodedTime->tm_sec;
+
+  return FormatTMTime(locale, dateFormatSelector, timeFormatSelector, &tmTime, stringOut);
+}
+
diff --git a/intl/locale/mac/nsDateTimeFormatMac.h b/intl/locale/mac/nsDateTimeFormatMac.h
new file mode 100644
index 0000000000..dfdf703780
--- /dev/null
+++ b/intl/locale/mac/nsDateTimeFormatMac.h
@@ -0,0 +1,61 @@
+
+/* -*- Mode: C++; tab-width: 2; 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/. */
+#ifndef nsDateTimeFormatMac_h__
+#define nsDateTimeFormatMac_h__
+
+
+#include "nsCOMPtr.h"
+#include "nsIDateTimeFormat.h"
+
+
+class nsDateTimeFormatMac : public nsIDateTimeFormat {
+
+public: 
+  NS_DECL_THREADSAFE_ISUPPORTS 
+
+  // performs a locale sensitive date formatting operation on the time_t parameter
+  NS_IMETHOD FormatTime(nsILocale* locale, 
+                        const nsDateFormatSelector  dateFormatSelector, 
+                        const nsTimeFormatSelector timeFormatSelector, 
+                        const time_t  timetTime, 
+                        nsAString& stringOut) override; 
+
+  // performs a locale sensitive date formatting operation on the struct tm parameter
+  NS_IMETHOD FormatTMTime(nsILocale* locale, 
+                          const nsDateFormatSelector  dateFormatSelector, 
+                          const nsTimeFormatSelector timeFormatSelector, 
+                          const struct tm*  tmTime, 
+                          nsAString& stringOut) override; 
+  // performs a locale sensitive date formatting operation on the PRTime parameter
+  NS_IMETHOD FormatPRTime(nsILocale* locale, 
+                          const nsDateFormatSelector  dateFormatSelector, 
+                          const nsTimeFormatSelector timeFormatSelector, 
+                          const PRTime  prTime, 
+                          nsAString& stringOut) override;
+
+  // performs a locale sensitive date formatting operation on the PRExplodedTime parameter
+  NS_IMETHOD FormatPRExplodedTime(nsILocale* locale, 
+                                  const nsDateFormatSelector  dateFormatSelector, 
+                                  const nsTimeFormatSelector timeFormatSelector, 
+                                  const PRExplodedTime*  explodedTime, 
+                                  nsAString& stringOut) override; 
+
+  nsDateTimeFormatMac() {}
+
+protected:
+  virtual ~nsDateTimeFormatMac() {}
+
+private:
+  // init this interface to a specified locale
+  NS_IMETHOD Initialize(nsILocale* locale);
+
+  nsString    mLocale;
+  nsString    mAppLocale;
+  bool        mUseDefaultLocale;
+};
+
+#endif  /* nsDateTimeFormatMac_h__ */
diff --git a/intl/locale/mac/nsMacCharset.cpp b/intl/locale/mac/nsMacCharset.cpp
new file mode 100644
index 0000000000..956560fba8
--- /dev/null
+++ b/intl/locale/mac/nsMacCharset.cpp
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 2; 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 <Carbon/Carbon.h>
+#include "nsIPlatformCharset.h"
+#include "nsCOMPtr.h"
+#include "nsIServiceManager.h"
+#include "nsReadableUtils.h"
+#include "nsPlatformCharset.h"
+#include "nsEncoderDecoderUtils.h"
+
+NS_IMPL_ISUPPORTS(nsPlatformCharset, nsIPlatformCharset)
+
+nsPlatformCharset::nsPlatformCharset()
+{
+}
+nsPlatformCharset::~nsPlatformCharset()
+{
+}
+
+NS_IMETHODIMP 
+nsPlatformCharset::GetCharset(nsPlatformCharsetSel selector, nsACString& oResult)
+{
+  oResult.AssignLiteral("UTF-8");
+  return NS_OK;
+}
+
+NS_IMETHODIMP 
+nsPlatformCharset::GetDefaultCharsetForLocale(const nsAString& localeName, nsACString &oResult)
+{
+  oResult.AssignLiteral("UTF-8");
+  return NS_OK;
+}
+
+NS_IMETHODIMP 
+nsPlatformCharset::Init()
+{
+  return NS_OK;
+}
+
+nsresult 
+nsPlatformCharset::MapToCharset(nsAString& inANSICodePage, nsACString& outCharset)
+{
+  return NS_OK;
+}
+
+nsresult
+nsPlatformCharset::InitGetCharset(nsACString &oString)
+{
+  return NS_OK;
+}
+
+nsresult
+nsPlatformCharset::VerifyCharset(nsCString &aCharset)
+{
+  return NS_OK;
+}
diff --git a/intl/locale/moz.build b/intl/locale/moz.build
index 4b3b3c0b88..94a30873ba 100644
--- a/intl/locale/moz.build
+++ b/intl/locale/moz.build
@@ -9,6 +9,8 @@ toolkit = CONFIG['MOZ_WIDGET_TOOLKIT']
 
 if toolkit == 'windows':
     DIRS += ['windows']
+elif toolkit == 'cocoa':
+    DIRS += ['mac']
 else:
     DIRS += ['unix']
 
diff --git a/intl/lwbrk/moz.build b/intl/lwbrk/moz.build
index dc7c2df1a2..da701be5e5 100644
--- a/intl/lwbrk/moz.build
+++ b/intl/lwbrk/moz.build
@@ -32,6 +32,10 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows':
     SOURCES += [
         'nsUniscribeBreaker.cpp',
     ]
+elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
+    UNIFIED_SOURCES += [
+        'nsCarbonBreaker.cpp',
+    ]
 else:
     SOURCES += [
         'nsRuleBreaker.cpp',
diff --git a/intl/lwbrk/nsCarbonBreaker.cpp b/intl/lwbrk/nsCarbonBreaker.cpp
new file mode 100644
index 0000000000..1b37bc1298
--- /dev/null
+++ b/intl/lwbrk/nsCarbonBreaker.cpp
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 2; 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 <CoreFoundation/CoreFoundation.h>
+#include <stdint.h>
+#include "nsDebug.h"
+#include "nscore.h"
+
+void
+NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
+                        uint8_t* aBreakBefore)
+{
+  NS_ASSERTION(aText, "aText shouldn't be null");
+
+  memset(aBreakBefore, 0, aLength * sizeof(uint8_t));
+
+  CFStringRef str = ::CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, reinterpret_cast<const UniChar*>(aText), aLength, kCFAllocatorNull);
+  if (!str) {
+    return;
+  }
+
+  CFStringTokenizerRef st = ::CFStringTokenizerCreate(kCFAllocatorDefault, str,
+                                                      ::CFRangeMake(0, aLength),
+                                                      kCFStringTokenizerUnitLineBreak,
+                                                      nullptr);
+  if (!st) {
+    ::CFRelease(str);
+    return;
+  }
+
+  CFStringTokenizerTokenType tt = ::CFStringTokenizerAdvanceToNextToken(st);
+  while (tt != kCFStringTokenizerTokenNone) {
+    CFRange r = ::CFStringTokenizerGetCurrentTokenRange(st);
+    if (r.location != 0) { // Ignore leading edge
+      aBreakBefore[r.location] = true;
+    }
+    tt = CFStringTokenizerAdvanceToNextToken(st);
+  }
+
+  ::CFRelease(st);
+  ::CFRelease(str);
+}