Merge branch 'html_input_datetime_1'

This is almost everything needed for #162.

2 files changed, 435 insertions, 0 deletions

diff --git a/js/src/builtin/Intl.cpp b/js/src/builtin/Intl.cpp
index 3a20c487b..cd808cb10 100644
--- a/js/src/builtin/Intl.cpp
+++ b/js/src/builtin/Intl.cpp
@@ -102,6 +102,18 @@ Char16ToUChar(char16_t* chars)
     MOZ_CRASH("Char16ToUChar: Intl API disabled");
 }
 
+inline char16_t*
+UCharToChar16(UChar* chars)
+{
+    MOZ_CRASH("UCharToChar16: Intl API disabled");
+}
+
+inline const char16_t*
+UCharToChar16(const UChar* chars)
+{
+    MOZ_CRASH("UCharToChar16: Intl API disabled");
+}
+
 static int32_t
 u_strlen(const UChar* s)
 {
@@ -356,6 +368,27 @@ enum UCalendarDateFields {
     UCAL_DAY_OF_MONTH = UCAL_DATE
 };
 
+enum UCalendarMonths {
+  UCAL_JANUARY,
+  UCAL_FEBRUARY,
+  UCAL_MARCH,
+  UCAL_APRIL,
+  UCAL_MAY,
+  UCAL_JUNE,
+  UCAL_JULY,
+  UCAL_AUGUST,
+  UCAL_SEPTEMBER,
+  UCAL_OCTOBER,
+  UCAL_NOVEMBER,
+  UCAL_DECEMBER,
+  UCAL_UNDECIMBER
+};
+
+enum UCalendarAMPMs {
+  UCAL_AM,
+  UCAL_PM
+};
+
 static UCalendar*
 ucal_open(const UChar* zoneID, int32_t len, const char* locale,
           UCalendarType type, UErrorCode* status)
@@ -420,6 +453,13 @@ ucal_getDefaultTimeZone(UChar* result, int32_t resultCapacity, UErrorCode* statu
     MOZ_CRASH("ucal_getDefaultTimeZone: Intl API disabled");
 }
 
+enum UDateTimePatternField {
+    UDATPG_YEAR_FIELD,
+    UDATPG_MONTH_FIELD,
+    UDATPG_WEEK_OF_YEAR_FIELD,
+    UDATPG_DAY_FIELD,
+};
+
 typedef void* UDateTimePatternGenerator;
 
 static UDateTimePatternGenerator*
@@ -436,6 +476,14 @@ udatpg_getBestPattern(UDateTimePatternGenerator* dtpg, const UChar* skeleton,
     MOZ_CRASH("udatpg_getBestPattern: Intl API disabled");
 }
 
+static const UChar *
+udatpg_getAppendItemName(const UDateTimePatternGenerator *dtpg,
+                         UDateTimePatternField field,
+                         int32_t *pLength)
+{
+    MOZ_CRASH("udatpg_getAppendItemName: Intl API disabled");
+}
+
 static void
 udatpg_close(UDateTimePatternGenerator* dtpg)
 {
@@ -488,10 +536,46 @@ enum UDateFormatField {
 };
 
 enum UDateFormatStyle {
+    UDAT_FULL,
+    UDAT_LONG,
+    UDAT_MEDIUM,
+    UDAT_SHORT,
+    UDAT_DEFAULT = UDAT_MEDIUM,
     UDAT_PATTERN = -2,
     UDAT_IGNORE = UDAT_PATTERN
 };
 
+enum UDateFormatSymbolType {
+    UDAT_ERAS,
+    UDAT_MONTHS,
+    UDAT_SHORT_MONTHS,
+    UDAT_WEEKDAYS,
+    UDAT_SHORT_WEEKDAYS,
+    UDAT_AM_PMS,
+    UDAT_LOCALIZED_CHARS,
+    UDAT_ERA_NAMES,
+    UDAT_NARROW_MONTHS,
+    UDAT_NARROW_WEEKDAYS,
+    UDAT_STANDALONE_MONTHS,
+    UDAT_STANDALONE_SHORT_MONTHS,
+    UDAT_STANDALONE_NARROW_MONTHS,
+    UDAT_STANDALONE_WEEKDAYS,
+    UDAT_STANDALONE_SHORT_WEEKDAYS,
+    UDAT_STANDALONE_NARROW_WEEKDAYS,
+    UDAT_QUARTERS,
+    UDAT_SHORT_QUARTERS,
+    UDAT_STANDALONE_QUARTERS,
+    UDAT_STANDALONE_SHORT_QUARTERS,
+    UDAT_SHORTER_WEEKDAYS,
+    UDAT_STANDALONE_SHORTER_WEEKDAYS,
+    UDAT_CYCLIC_YEARS_WIDE,
+    UDAT_CYCLIC_YEARS_ABBREVIATED,
+    UDAT_CYCLIC_YEARS_NARROW,
+    UDAT_ZODIAC_NAMES_WIDE,
+    UDAT_ZODIAC_NAMES_ABBREVIATED,
+    UDAT_ZODIAC_NAMES_NARROW
+};
+
 static int32_t
 udat_countAvailable()
 {
@@ -563,6 +647,13 @@ udat_close(UDateFormat* format)
     MOZ_CRASH("udat_close: Intl API disabled");
 }
 
+static int32_t
+udat_getSymbols(const UDateFormat *fmt, UDateFormatSymbolType type, int32_t symbolIndex,
+                UChar *result, int32_t resultLength, UErrorCode *status)
+{
+    MOZ_CRASH("udat_getSymbols: Intl API disabled");
+}
+
 #endif
 
 
@@ -2921,6 +3012,296 @@ js::intl_GetCalendarInfo(JSContext* cx, unsigned argc, Value* vp)
     return true;
 }
 
+template<size_t N>
+inline bool
+MatchPart(const char** pattern, const char (&part)[N])
+{
+    if (strncmp(*pattern, part, N - 1))
+        return false;
+
+    *pattern += N - 1;
+    return true;
+}
+
+bool
+js::intl_ComputeDisplayNames(JSContext* cx, unsigned argc, Value* vp)
+{
+    CallArgs args = CallArgsFromVp(argc, vp);
+    MOZ_ASSERT(args.length() == 3);
+    // 1. Assert: locale is a string.
+    MOZ_ASSERT(args[0].isString());
+    // 2. Assert: style is a string.
+    MOZ_ASSERT(args[1].isString());
+    // 3. Assert: keys is an Array.
+    MOZ_ASSERT(args[2].isObject());
+
+    JSAutoByteString locale(cx, args[0].toString());
+    if (!locale)
+        return false;
+
+    JSAutoByteString style(cx, args[1].toString());
+    if (!style)
+        return false;
+
+    RootedArrayObject keys(cx, &args[2].toObject().as<ArrayObject>());
+    if (!keys)
+        return false;
+
+    // 4. Let result be ArrayCreate(0).
+    RootedArrayObject result(cx, NewDenseUnallocatedArray(cx, keys->length()));
+    if (!result)
+        return false;
+
+    UErrorCode status = U_ZERO_ERROR;
+
+    UDateFormat* fmt =
+        udat_open(UDAT_DEFAULT, UDAT_DEFAULT, icuLocale(locale.ptr()),
+        nullptr, 0, nullptr, 0, &status);
+    if (U_FAILURE(status)) {
+        JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_INTERNAL_INTL_ERROR);
+        return false;
+    }
+    ScopedICUObject<UDateFormat, udat_close> datToClose(fmt);
+
+    // UDateTimePatternGenerator will be needed for translations of date and
+    // time fields like "month", "week", "day" etc.
+    UDateTimePatternGenerator* dtpg = udatpg_open(icuLocale(locale.ptr()), &status);
+    if (U_FAILURE(status)) {
+        JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_INTERNAL_INTL_ERROR);
+        return false;
+    }
+    ScopedICUObject<UDateTimePatternGenerator, udatpg_close> datPgToClose(dtpg);
+
+    RootedValue keyValue(cx);
+    RootedString keyValStr(cx);
+    RootedValue wordVal(cx);
+    Vector<char16_t, INITIAL_CHAR_BUFFER_SIZE> chars(cx);
+    if (!chars.resize(INITIAL_CHAR_BUFFER_SIZE))
+        return false;
+
+    // 5. For each element of keys,
+    for (uint32_t i = 0; i < keys->length(); i++) {
+        /**
+         * We iterate over keys array looking for paths that we have code
+         * branches for.
+         *
+         * For any unknown path branch, the wordVal will keep NullValue and
+         * we'll throw at the end.
+         */
+
+        if (!GetElement(cx, keys, keys, i, &keyValue))
+            return false;
+
+        JSAutoByteString pattern;
+        keyValStr = keyValue.toString();
+        if (!pattern.encodeUtf8(cx, keyValStr))
+            return false;
+
+        wordVal.setNull();
+
+        // 5.a. Perform an implementation dependent algorithm to map a key to a
+        //      corresponding display name.
+        const char* pat = pattern.ptr();
+
+        if (!MatchPart(&pat, "dates")) {
+            JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+            return false;
+        }
+
+        if (!MatchPart(&pat, "/")) {
+            JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+            return false;
+        }
+
+        if (MatchPart(&pat, "fields")) {
+            if (!MatchPart(&pat, "/")) {
+                JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                return false;
+            }
+
+            UDateTimePatternField fieldType;
+
+            if (MatchPart(&pat, "year")) {
+                fieldType = UDATPG_YEAR_FIELD;
+            } else if (MatchPart(&pat, "month")) {
+                fieldType = UDATPG_MONTH_FIELD;
+            } else if (MatchPart(&pat, "week")) {
+                fieldType = UDATPG_WEEK_OF_YEAR_FIELD;
+            } else if (MatchPart(&pat, "day")) {
+                fieldType = UDATPG_DAY_FIELD;
+            } else {
+                JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                return false;
+            }
+
+            // This part must be the final part with no trailing data.
+            if (*pat != '\0') {
+                JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                return false;
+            }
+
+            int32_t resultSize;
+
+            const UChar* value = udatpg_getAppendItemName(dtpg, fieldType, &resultSize);
+            if (U_FAILURE(status)) {
+                JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_INTERNAL_INTL_ERROR);
+                return false;
+            }
+
+            JSString* word = NewStringCopyN<CanGC>(cx, UCharToChar16(value), resultSize);
+            if (!word)
+                return false;
+
+            wordVal.setString(word);
+        } else if (MatchPart(&pat, "gregorian")) {
+            if (!MatchPart(&pat, "/")) {
+                JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                return false;
+            }
+
+            UDateFormatSymbolType symbolType;
+            int32_t index;
+
+            if (MatchPart(&pat, "months")) {
+                if (!MatchPart(&pat, "/")) {
+                    JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                    return false;
+                }
+
+                if (equal(style, "narrow")) {
+                    symbolType = UDAT_STANDALONE_NARROW_MONTHS;
+                } else if (equal(style, "short")) {
+                    symbolType = UDAT_STANDALONE_SHORT_MONTHS;
+                } else {
+                    MOZ_ASSERT(equal(style, "long"));
+                    symbolType = UDAT_STANDALONE_MONTHS;
+                }
+
+                if (MatchPart(&pat, "january")) {
+                    index = UCAL_JANUARY;
+                } else if (MatchPart(&pat, "february")) {
+                    index = UCAL_FEBRUARY;
+                } else if (MatchPart(&pat, "march")) {
+                    index = UCAL_MARCH;
+                } else if (MatchPart(&pat, "april")) {
+                    index = UCAL_APRIL;
+                } else if (MatchPart(&pat, "may")) {
+                    index = UCAL_MAY;
+                } else if (MatchPart(&pat, "june")) {
+                    index = UCAL_JUNE;
+                } else if (MatchPart(&pat, "july")) {
+                    index = UCAL_JULY;
+                } else if (MatchPart(&pat, "august")) {
+                    index = UCAL_AUGUST;
+                } else if (MatchPart(&pat, "september")) {
+                    index = UCAL_SEPTEMBER;
+                } else if (MatchPart(&pat, "october")) {
+                    index = UCAL_OCTOBER;
+                } else if (MatchPart(&pat, "november")) {
+                    index = UCAL_NOVEMBER;
+                } else if (MatchPart(&pat, "december")) {
+                    index = UCAL_DECEMBER;
+                } else {
+                    JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                    return false;
+                }
+            } else if (MatchPart(&pat, "weekdays")) {
+                if (!MatchPart(&pat, "/")) {
+                    JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                    return false;
+                }
+
+                if (equal(style, "narrow")) {
+                    symbolType = UDAT_STANDALONE_NARROW_WEEKDAYS;
+                } else if (equal(style, "short")) {
+                    symbolType = UDAT_STANDALONE_SHORT_WEEKDAYS;
+                } else {
+                    MOZ_ASSERT(equal(style, "long"));
+                    symbolType = UDAT_STANDALONE_WEEKDAYS;
+                }
+
+                if (MatchPart(&pat, "monday")) {
+                    index = UCAL_MONDAY;
+                } else if (MatchPart(&pat, "tuesday")) {
+                    index = UCAL_TUESDAY;
+                } else if (MatchPart(&pat, "wednesday")) {
+                    index = UCAL_WEDNESDAY;
+                } else if (MatchPart(&pat, "thursday")) {
+                    index = UCAL_THURSDAY;
+                } else if (MatchPart(&pat, "friday")) {
+                    index = UCAL_FRIDAY;
+                } else if (MatchPart(&pat, "saturday")) {
+                    index = UCAL_SATURDAY;
+                } else if (MatchPart(&pat, "sunday")) {
+                    index = UCAL_SUNDAY;
+                } else {
+                    JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                    return false;
+                }
+            } else if (MatchPart(&pat, "dayperiods")) {
+                if (!MatchPart(&pat, "/")) {
+                    JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                    return false;
+                }
+
+                symbolType = UDAT_AM_PMS;
+
+                if (MatchPart(&pat, "am")) {
+                    index = UCAL_AM;
+                } else if (MatchPart(&pat, "pm")) {
+                    index = UCAL_PM;
+                } else {
+                    JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                    return false;
+                }
+            } else {
+                JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                return false;
+            }
+
+            // This part must be the final part with no trailing data.
+            if (*pat != '\0') {
+                JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+                return false;
+            }
+
+            int32_t resultSize =
+                udat_getSymbols(fmt, symbolType, index, Char16ToUChar(chars.begin()),
+                                INITIAL_CHAR_BUFFER_SIZE, &status);
+            if (status == U_BUFFER_OVERFLOW_ERROR) {
+                if (!chars.resize(resultSize))
+                    return false;
+                status = U_ZERO_ERROR;
+                udat_getSymbols(fmt, symbolType, index, Char16ToUChar(chars.begin()),
+                                resultSize, &status);
+            }
+            if (U_FAILURE(status)) {
+                JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_INTERNAL_INTL_ERROR);
+                return false;
+            }
+
+            JSString* word = NewStringCopyN<CanGC>(cx, chars.begin(), resultSize);
+            if (!word)
+                return false;
+
+            wordVal.setString(word);
+        } else {
+            JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, JSMSG_INVALID_KEY, pattern.ptr());
+            return false;
+        }
+
+        MOZ_ASSERT(wordVal.isString());
+
+        // 5.b. Append the result string to result.
+        if (!DefineElement(cx, result, i, wordVal))
+            return false;
+    }
+
+    // 6. Return result.
+    args.rval().setObject(*result);
+    return true;
+}
+
 /******************** Intl ********************/
 
 const Class js::IntlClass = {
diff --git a/js/src/builtin/Intl.h b/js/src/builtin/Intl.h
index 54764605b..b2197060d 100644
--- a/js/src/builtin/Intl.h
+++ b/js/src/builtin/Intl.h
@@ -387,6 +387,48 @@ intl_FormatDateTime(JSContext* cx, unsigned argc, Value* vp);
 extern MOZ_MUST_USE bool
 intl_GetCalendarInfo(JSContext* cx, unsigned argc, Value* vp);
 
+/**
+ * Returns an Array with CLDR-based fields display names.
+ * The function takes three arguments:
+ *
+ *   locale
+ *     BCP47 compliant locale string
+ *   style
+ *     A string with values: long or short or narrow
+ *   keys
+ *     An array or path-like strings that identify keys to be returned
+ *     At the moment the following types of keys are supported:
+ *
+ *       'dates/fields/{year|month|week|day}'
+ *       'dates/gregorian/months/{january|...|december}'
+ *       'dates/gregorian/weekdays/{sunday|...|saturday}'
+ *       'dates/gregorian/dayperiods/{am|pm}'
+ *
+ * Example:
+ *
+ * let info = intl_ComputeDisplayNames(
+ *   'en-US',
+ *   'long',
+ *   [
+ *     'dates/fields/year',
+ *     'dates/gregorian/months/january',
+ *     'dates/gregorian/weekdays/monday',
+ *     'dates/gregorian/dayperiods/am',
+ *   ]
+ * );
+ *
+ * Returned value:
+ *
+ * [
+ *   'year',
+ *   'January',
+ *   'Monday',
+ *   'AM'
+ * ]
+ */
+extern MOZ_MUST_USE bool
+intl_ComputeDisplayNames(JSContext* cx, unsigned argc, Value* vp);
+
 #if ENABLE_INTL_API
 /**
  * Cast char16_t* strings to UChar* strings used by ICU.
@@ -402,6 +444,18 @@ Char16ToUChar(char16_t* chars)
 {
   return reinterpret_cast<UChar*>(chars);
 }
+
+inline char16_t*
+UCharToChar16(UChar* chars)
+{
+  return reinterpret_cast<char16_t*>(chars);
+}
+
+inline const char16_t*
+UCharToChar16(const UChar* chars)
+{
+  return reinterpret_cast<const char16_t*>(chars);
+}
 #endif // ENABLE_INTL_API
 
 } // namespace js