1 files changed, 418 insertions, 0 deletions
diff --git a/js/src/builtin/intl/DisplayNames.js b/js/src/builtin/intl/DisplayNames.js
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+++ b/js/src/builtin/intl/DisplayNames.js
@@ -0,0 +1,418 @@
+/* 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/. */
+
+/**
+ * Intl.DisplayNames internal properties.
+ */
+function displayNamesLocaleData() {
+  // Intl.DisplayNames doesn't support any extension keys.
+  return {};
+}
+var displayNamesInternalProperties = {
+  localeData: displayNamesLocaleData,
+  relevantExtensionKeys: [],
+};
+
+function mozDisplayNamesLocaleData() {
+  return {
+    ca: intl_availableCalendars,
+    default: {
+      ca: intl_defaultCalendar,
+    },
+  };
+}
+var mozDisplayNamesInternalProperties = {
+  localeData: mozDisplayNamesLocaleData,
+  relevantExtensionKeys: ["ca"],
+};
+
+/**
+ * Intl.DisplayNames ( [ locales [ , options ] ] )
+ *
+ * Compute an internal properties object from |lazyDisplayNamesData|.
+ */
+function resolveDisplayNamesInternals(lazyDisplayNamesData) {
+  assert(IsObject(lazyDisplayNamesData), "lazy data not an object?");
+
+  var internalProps = std_Object_create(null);
+
+  var mozExtensions = lazyDisplayNamesData.mozExtensions;
+
+  var DisplayNames = mozExtensions
+    ? mozDisplayNamesInternalProperties
+    : displayNamesInternalProperties;
+
+  // Compute effective locale.
+
+  // Step 7.
+  var localeData = DisplayNames.localeData;
+
+  // Step 10.
+  var r = ResolveLocale(
+    "DisplayNames",
+    lazyDisplayNamesData.requestedLocales,
+    lazyDisplayNamesData.opt,
+    DisplayNames.relevantExtensionKeys,
+    localeData
+  );
+
+  // Step 12.
+  internalProps.style = lazyDisplayNamesData.style;
+
+  // Step 14.
+  var type = lazyDisplayNamesData.type;
+  internalProps.type = type;
+
+  // Step 16.
+  internalProps.fallback = lazyDisplayNamesData.fallback;
+
+  // Step 17.
+  internalProps.locale = r.locale;
+
+  // Step 25.
+  if (type === "language") {
+    internalProps.languageDisplay = lazyDisplayNamesData.languageDisplay;
+  }
+
+  if (mozExtensions) {
+    internalProps.calendar = r.ca;
+  }
+
+  // The caller is responsible for associating |internalProps| with the right
+  // object using |setInternalProperties|.
+  return internalProps;
+}
+
+/**
+ * Returns an object containing the DisplayNames internal properties of |obj|.
+ */
+function getDisplayNamesInternals(obj) {
+  assert(IsObject(obj), "getDisplayNamesInternals called with non-object");
+  assert(
+    intl_GuardToDisplayNames(obj) !== null,
+    "getDisplayNamesInternals called with non-DisplayNames"
+  );
+
+  var internals = getIntlObjectInternals(obj);
+  assert(
+    internals.type === "DisplayNames",
+    "bad type escaped getIntlObjectInternals"
+  );
+
+  // If internal properties have already been computed, use them.
+  var internalProps = maybeInternalProperties(internals);
+  if (internalProps) {
+    return internalProps;
+  }
+
+  // Otherwise it's time to fully create them.
+  internalProps = resolveDisplayNamesInternals(internals.lazyData);
+  setInternalProperties(internals, internalProps);
+  return internalProps;
+}
+
+/**
+ * Intl.DisplayNames ( [ locales [ , options ] ] )
+ *
+ * Initializes an object as a DisplayNames.
+ *
+ * This method is complicated a moderate bit by its implementing initialization
+ * as a *lazy* concept.  Everything that must happen now, does -- but we defer
+ * all the work we can until the object is actually used as a DisplayNames.
+ * This later work occurs in |resolveDisplayNamesInternals|; steps not noted
+ * here occur there.
+ */
+function InitializeDisplayNames(displayNames, locales, options, mozExtensions) {
+  assert(
+    IsObject(displayNames),
+    "InitializeDisplayNames called with non-object"
+  );
+  assert(
+    intl_GuardToDisplayNames(displayNames) !== null,
+    "InitializeDisplayNames called with non-DisplayNames"
+  );
+
+  // Lazy DisplayNames data has the following structure:
+  //
+  //   {
+  //     requestedLocales: List of locales,
+  //
+  //     opt: // opt object computed in InitializeDisplayNames
+  //       {
+  //         localeMatcher: "lookup" / "best fit",
+  //
+  //         ca: string matching a Unicode extension type, // optional
+  //       }
+  //
+  //     localeMatcher: "lookup" / "best fit",
+  //
+  //     style: "narrow" / "short" / "abbreviated" / "long",
+  //
+  //     type: "language" / "region" / "script" / "currency" / "weekday" /
+  //           "month" / "quarter" / "dayPeriod" / "dateTimeField"
+  //
+  //     fallback: "code" / "none",
+  //
+  //     // field present only if type === "language":
+  //     languageDisplay: "dialect" / "standard",
+  //
+  //     mozExtensions: true / false,
+  //   }
+  //
+  // Note that lazy data is only installed as a final step of initialization,
+  // so every DisplayNames lazy data object has *all* these properties, never a
+  // subset of them.
+  var lazyDisplayNamesData = std_Object_create(null);
+
+  // Step 3.
+  var requestedLocales = CanonicalizeLocaleList(locales);
+  lazyDisplayNamesData.requestedLocales = requestedLocales;
+
+  // Step 4.
+  if (!IsObject(options)) {
+    ThrowTypeError(
+      JSMSG_OBJECT_REQUIRED,
+      options === null ? "null" : typeof options
+    );
+  }
+
+  // Step 5.
+  var opt = new_Record();
+  lazyDisplayNamesData.opt = opt;
+  lazyDisplayNamesData.mozExtensions = mozExtensions;
+
+  // Steps 7-8.
+  var matcher = GetOption(
+    options,
+    "localeMatcher",
+    "string",
+    ["lookup", "best fit"],
+    "best fit"
+  );
+  opt.localeMatcher = matcher;
+
+  if (mozExtensions) {
+    var calendar = GetOption(
+      options,
+      "calendar",
+      "string",
+      undefined,
+      undefined
+    );
+
+    if (calendar !== undefined) {
+      calendar = intl_ValidateAndCanonicalizeUnicodeExtensionType(
+        calendar,
+        "calendar",
+        "ca"
+      );
+    }
+
+    opt.ca = calendar;
+  }
+
+  // Step 10.
+  var style;
+  if (mozExtensions) {
+    style = GetOption(
+      options,
+      "style",
+      "string",
+      ["narrow", "short", "abbreviated", "long"],
+      "long"
+    );
+  } else {
+    style = GetOption(
+      options,
+      "style",
+      "string",
+      ["narrow", "short", "long"],
+      "long"
+    );
+  }
+
+  // Step 11.
+  lazyDisplayNamesData.style = style;
+
+  // Step 12.
+  var type;
+  if (mozExtensions) {
+    type = GetOption(
+      options,
+      "type",
+      "string",
+      [
+        "language",
+        "region",
+        "script",
+        "currency",
+        "calendar",
+        "dateTimeField",
+        "weekday",
+        "month",
+        "quarter",
+        "dayPeriod",
+      ],
+      undefined
+    );
+  } else {
+    type = GetOption(
+      options,
+      "type",
+      "string",
+      ["language", "region", "script", "currency", "calendar", "dateTimeField"],
+      undefined
+    );
+  }
+
+  // Step 13.
+  if (type === undefined) {
+    ThrowTypeError(JSMSG_UNDEFINED_TYPE);
+  }
+
+  // Step 14.
+  lazyDisplayNamesData.type = type;
+
+  // Step 15.
+  var fallback = GetOption(
+    options,
+    "fallback",
+    "string",
+    ["code", "none"],
+    "code"
+  );
+
+  // Step 16.
+  lazyDisplayNamesData.fallback = fallback;
+
+  // Step 24.
+  var languageDisplay = GetOption(
+    options,
+    "languageDisplay",
+    "string",
+    ["dialect", "standard"],
+    "dialect"
+  );
+
+  // Step 25.
+  if (type === "language") {
+    lazyDisplayNamesData.languageDisplay = languageDisplay;
+  }
+
+  // We've done everything that must be done now: mark the lazy data as fully
+  // computed and install it.
+  initializeIntlObject(displayNames, "DisplayNames", lazyDisplayNamesData);
+}
+
+/**
+ * Returns the subset of the given locale list for which this locale list has a
+ * matching (possibly fallback) locale. Locales appear in the same order in the
+ * returned list as in the input list.
+ */
+function Intl_DisplayNames_supportedLocalesOf(locales /*, options*/) {
+  var options = arguments.length > 1 ? arguments[1] : undefined;
+
+  // Step 1.
+  var availableLocales = "DisplayNames";
+
+  // Step 2.
+  var requestedLocales = CanonicalizeLocaleList(locales);
+
+  // Step 3.
+  return SupportedLocales(availableLocales, requestedLocales, options);
+}
+
+/**
+ * Returns the resolved options for a DisplayNames object.
+ */
+function Intl_DisplayNames_of(code) {
+  // Step 1.
+  var displayNames = this;
+
+  // Steps 2-3.
+  if (
+    !IsObject(displayNames) ||
+    (displayNames = intl_GuardToDisplayNames(displayNames)) === null
+  ) {
+    return callFunction(
+      intl_CallDisplayNamesMethodIfWrapped,
+      this,
+      "Intl_DisplayNames_of"
+    );
+  }
+
+  code = ToString(code);
+
+  var internals = getDisplayNamesInternals(displayNames);
+
+  // Unpack the internals object to avoid a slow runtime to selfhosted JS call
+  // in |intl_ComputeDisplayName()|.
+  var {
+    locale,
+    calendar = "",
+    style,
+    type,
+    languageDisplay = "",
+    fallback,
+  } = internals;
+
+  // Steps 5-10.
+  return intl_ComputeDisplayName(
+    displayNames,
+    locale,
+    calendar,
+    style,
+    languageDisplay,
+    fallback,
+    type,
+    code
+  );
+}
+
+/**
+ * Returns the resolved options for a DisplayNames object.
+ */
+function Intl_DisplayNames_resolvedOptions() {
+  // Step 1.
+  var displayNames = this;
+
+  // Steps 2-3.
+  if (
+    !IsObject(displayNames) ||
+    (displayNames = intl_GuardToDisplayNames(displayNames)) === null
+  ) {
+    return callFunction(
+      intl_CallDisplayNamesMethodIfWrapped,
+      this,
+      "Intl_DisplayNames_resolvedOptions"
+    );
+  }
+
+  var internals = getDisplayNamesInternals(displayNames);
+
+  // Steps 4-5.
+  var options = {
+    locale: internals.locale,
+    style: internals.style,
+    type: internals.type,
+    fallback: internals.fallback,
+  };
+
+  // languageDisplay is only present for language display names.
+  assert(
+    hasOwn("languageDisplay", internals) === (internals.type === "language"),
+    "languageDisplay is present iff type is 'language'"
+  );
+
+  if (hasOwn("languageDisplay", internals)) {
+    DefineDataProperty(options, "languageDisplay", internals.languageDisplay);
+  }
+
+  if (hasOwn("calendar", internals)) {
+    DefineDataProperty(options, "calendar", internals.calendar);
+  }
+
+  // Step 6.
+  return options;
+}