Revert r7768

src/extensions/experimental/i18n-locale.cc

Index: src/extensions/experimental/i18n-locale.cc
===================================================================
--- src/extensions/experimental/i18n-locale.cc	(revision 7774)
+++ src/extensions/experimental/i18n-locale.cc	(working copy)
@@ -27,86 +27,146 @@
 
 #include "i18n-locale.h"
 
-#include "language-matcher.h"
-#include "platform.h"
+#include <algorithm>
+#include <string>
+
 #include "unicode/locid.h"
 #include "unicode/uloc.h"
-#include "utils.h"
 
 namespace v8 {
 namespace internal {
 
-const char* const I18NLocale::kLocaleID = "localeID";
-const char* const I18NLocale::kRegionID = "regionID";
-const char* const I18NLocale::kICULocaleID = "icuLocaleID";
-
 v8::Handle<v8::Value> I18NLocale::JSLocale(const v8::Arguments& args) {
-  v8::HandleScope handle_scope;
+  // TODO(cira): Fetch browser locale. Accept en-US as good default for now.
+  // We could possibly pass browser locale as a parameter in the constructor.
+  std::string locale_name("en-US");
+  if (args.Length() == 1 && args[0]->IsString()) {
+    locale_name = *v8::String::Utf8Value(args[0]->ToString());
+  }
 
-  if (args.Length() != 1 || !args[0]->IsObject()) {
+  v8::Local<v8::Object> locale = v8::Object::New();
+  locale->Set(v8::String::New("locale"), v8::String::New(locale_name.c_str()));
+
+  icu::Locale icu_locale(locale_name.c_str());
+
+  const char* language = icu_locale.getLanguage();
+  locale->Set(v8::String::New("language"), v8::String::New(language));
+
+  const char* script = icu_locale.getScript();
+  if (strlen(script)) {
+    locale->Set(v8::String::New("script"), v8::String::New(script));
+  }
+
+  const char* region = icu_locale.getCountry();
+  if (strlen(region)) {
+    locale->Set(v8::String::New("region"), v8::String::New(region));
+  }
+
+  return locale;
+}
+
+// TODO(cira): Filter out locales that Chrome doesn't support.
+v8::Handle<v8::Value> I18NLocale::JSAvailableLocales(
+    const v8::Arguments& args) {
+  v8::Local<v8::Array> all_locales = v8::Array::New();
+
+  int count = 0;
+  const icu::Locale* icu_locales = icu::Locale::getAvailableLocales(count);
+  for (int i = 0; i < count; ++i) {
+    all_locales->Set(i, v8::String::New(icu_locales[i].getName()));
+  }
+
+  return all_locales;
+}
+
+// Use - as tag separator, not _ that ICU uses.
+static std::string NormalizeLocale(const std::string& locale) {
+  std::string result(locale);
+  // TODO(cira): remove STL dependency.
+  std::replace(result.begin(), result.end(), '_', '-');
+  return result;
+}
+
+v8::Handle<v8::Value> I18NLocale::JSMaximizedLocale(const v8::Arguments& args) {
+  if (!args.Length() || !args[0]->IsString()) {
     return v8::Undefined();
   }
 
-  v8::Local<v8::Object> settings = args[0]->ToObject();
+  UErrorCode status = U_ZERO_ERROR;
+  std::string locale_name = *v8::String::Utf8Value(args[0]->ToString());
+  char max_locale[ULOC_FULLNAME_CAPACITY];
+  uloc_addLikelySubtags(locale_name.c_str(), max_locale,
+                        sizeof(max_locale), &status);
+  if (U_FAILURE(status)) {
+    return v8::Undefined();
+  }
 
-  // Get best match for locale.
-  v8::TryCatch try_catch;
-  v8::Handle<v8::Value> locale_id = settings->Get(v8::String::New(kLocaleID));
-  if (try_catch.HasCaught()) {
+  return v8::String::New(NormalizeLocale(max_locale).c_str());
+}
+
+v8::Handle<v8::Value> I18NLocale::JSMinimizedLocale(const v8::Arguments& args) {
+  if (!args.Length() || !args[0]->IsString()) {
     return v8::Undefined();
   }
 
-  LocaleIDMatch result;
-  if (locale_id->IsArray()) {
-    LanguageMatcher::GetBestMatchForPriorityList(
-        v8::Handle<v8::Array>::Cast(locale_id), &result);
-  } else if (locale_id->IsString()) {
-    LanguageMatcher::GetBestMatchForString(locale_id->ToString(), &result);
-  } else {
-    LanguageMatcher::GetBestMatchForString(v8::String::New(""), &result);
+  UErrorCode status = U_ZERO_ERROR;
+  std::string locale_name = *v8::String::Utf8Value(args[0]->ToString());
+  char min_locale[ULOC_FULLNAME_CAPACITY];
+  uloc_minimizeSubtags(locale_name.c_str(), min_locale,
+                       sizeof(min_locale), &status);
+  if (U_FAILURE(status)) {
+    return v8::Undefined();
   }
 
-  // Get best match for region.
-  char region_id[ULOC_COUNTRY_CAPACITY];
-  OS::SNPrintF(Vector<char>(region_id, ARRAY_SIZE("")), "");
+  return v8::String::New(NormalizeLocale(min_locale).c_str());
+}
 
-  v8::Handle<v8::Value> region = settings->Get(v8::String::New(kRegionID));
-  if (try_catch.HasCaught()) {
+// Common code for JSDisplayXXX methods.
+static v8::Handle<v8::Value> GetDisplayItem(const v8::Arguments& args,
+                                            const std::string& item) {
+  if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsString()) {
     return v8::Undefined();
   }
 
-  if (!GetBestMatchForRegionID(result.icu_id, region, region_id)) {
-    // Set region id to empty string because region couldn't be inferred.
-    OS::SNPrintF(Vector<char>(region_id, ARRAY_SIZE("")), "");
+  std::string base_locale = *v8::String::Utf8Value(args[0]->ToString());
+  icu::Locale icu_locale(base_locale.c_str());
+  icu::Locale display_locale =
+      icu::Locale(*v8::String::Utf8Value(args[1]->ToString()));
+  icu::UnicodeString result;
+  if (item == "language") {
+    icu_locale.getDisplayLanguage(display_locale, result);
+  } else if (item == "script") {
+    icu_locale.getDisplayScript(display_locale, result);
+  } else if (item == "region") {
+    icu_locale.getDisplayCountry(display_locale, result);
+  } else if (item == "name") {
+    icu_locale.getDisplayName(display_locale, result);
+  } else {
+    return v8::Undefined();
   }
 
-  // Build JavaScript object that contains bcp and icu locale ID and region ID.
-  v8::Handle<v8::Object> locale = v8::Object::New();
-  locale->Set(v8::String::New(kLocaleID), v8::String::New(result.bcp47_id));
-  locale->Set(v8::String::New(kICULocaleID), v8::String::New(result.icu_id));
-  locale->Set(v8::String::New(kRegionID), v8::String::New(region_id));
+  if (result.length()) {
+    return v8::String::New(
+        reinterpret_cast<const uint16_t*>(result.getBuffer()), result.length());
+  }
 
-  return handle_scope.Close(locale);
+  return v8::Undefined();
 }
 
-bool I18NLocale::GetBestMatchForRegionID(
-    const char* locale_id, v8::Handle<v8::Value> region_id, char* result) {
-  if (region_id->IsString() && region_id->ToString()->Length() != 0) {
-    icu::Locale user_locale(
-        icu::Locale("und", *v8::String::Utf8Value(region_id->ToString())));
-    OS::SNPrintF(Vector<char>(result, ULOC_COUNTRY_CAPACITY),
-                 "%s", user_locale.getCountry());
-    return true;
-  }
-  // Maximize locale_id to infer the region (e.g. expand "de" to "de-Latn-DE"
-  // and grab "DE" from the result).
-  UErrorCode status = U_ZERO_ERROR;
-  char maximized_locale[ULOC_FULLNAME_CAPACITY];
-  uloc_addLikelySubtags(
-      locale_id, maximized_locale, ULOC_FULLNAME_CAPACITY, &status);
-  uloc_getCountry(maximized_locale, result, ULOC_COUNTRY_CAPACITY, &status);
+v8::Handle<v8::Value> I18NLocale::JSDisplayLanguage(const v8::Arguments& args) {
+  return GetDisplayItem(args, "language");
+}
 
-  return !U_FAILURE(status);
+v8::Handle<v8::Value> I18NLocale::JSDisplayScript(const v8::Arguments& args) {
+  return GetDisplayItem(args, "script");
 }
 
+v8::Handle<v8::Value> I18NLocale::JSDisplayRegion(const v8::Arguments& args) {
+  return GetDisplayItem(args, "region");
+}
+
+v8::Handle<v8::Value> I18NLocale::JSDisplayName(const v8::Arguments& args) {
+  return GetDisplayItem(args, "name");
+}
+
 } }  // namespace v8::internal