1 // Copyright 2018 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_INTL_SUPPORT 6 #error Internationalization is expected to be enabled. 7 #endif // V8_INTL_SUPPORT 8 9 #ifndef V8_OBJECTS_JS_RELATIVE_TIME_FORMAT_H_ 10 #define V8_OBJECTS_JS_RELATIVE_TIME_FORMAT_H_ 11 12 #include "src/heap/factory.h" 13 #include "src/isolate.h" 14 #include "src/objects.h" 15 #include "unicode/uversion.h" 16 17 // Has to be the last include (doesn't have include guards): 18 #include "src/objects/object-macros.h" 19 20 namespace U_ICU_NAMESPACE { 21 class RelativeDateTimeFormatter; 22 } 23 24 namespace v8 { 25 namespace internal { 26 27 class JSRelativeTimeFormat : public JSObject { 28 public: 29 // Initializes relative time format object with properties derived from input 30 // locales and options. 31 static MaybeHandle<JSRelativeTimeFormat> InitializeRelativeTimeFormat( 32 Isolate* isolate, 33 Handle<JSRelativeTimeFormat> relative_time_format_holder, 34 Handle<Object> locales, Handle<Object> options); 35 36 static Handle<JSObject> ResolvedOptions( 37 Isolate* isolate, Handle<JSRelativeTimeFormat> format_holder); 38 39 // Unpacks formatter object from corresponding JavaScript object. 40 static icu::RelativeDateTimeFormatter* UnpackFormatter( 41 Handle<JSRelativeTimeFormat> relative_time_format_holder); 42 Handle<String> StyleAsString() const; 43 Handle<String> NumericAsString() const; 44 45 DECL_CAST(JSRelativeTimeFormat) 46 47 // RelativeTimeFormat accessors. 48 DECL_ACCESSORS(locale, String) 49 50 DECL_ACCESSORS(formatter, Foreign) 51 52 // Style: identifying the relative time format style used. 53 // 54 // ecma402/#sec-properties-of-intl-relativetimeformat-instances 55 56 enum class Style { 57 LONG, // Everything spelled out. 58 SHORT, // Abbreviations used when possible. 59 NARROW, // Use the shortest possible form. 60 COUNT 61 }; 62 inline void set_style(Style style); 63 inline Style style() const; 64 65 // Numeric: identifying whether numerical descriptions are always used, or 66 // used only when no more specific version is available (e.g., "1 day ago" vs 67 // "yesterday"). 68 // 69 // ecma402/#sec-properties-of-intl-relativetimeformat-instances 70 enum class Numeric { 71 ALWAYS, // numerical descriptions are always used ("1 day ago") 72 AUTO, // numerical descriptions are used only when no more specific 73 // version is available ("yesterday") 74 COUNT 75 }; 76 inline void set_numeric(Numeric numeric); 77 inline Numeric numeric() const; 78 79 // Bit positions in |flags|. 80 #define FLAGS_BIT_FIELDS(V, _) \ 81 V(StyleBits, Style, 2, _) \ 82 V(NumericBits, Numeric, 1, _) 83 DEFINE_BIT_FIELDS(FLAGS_BIT_FIELDS) 84 #undef FLAGS_BIT_FIELDS 85 86 STATIC_ASSERT(Style::LONG <= StyleBits::kMax); 87 STATIC_ASSERT(Style::SHORT <= StyleBits::kMax); 88 STATIC_ASSERT(Style::NARROW <= StyleBits::kMax); 89 STATIC_ASSERT(Numeric::AUTO <= NumericBits::kMax); 90 STATIC_ASSERT(Numeric::ALWAYS <= NumericBits::kMax); 91 92 // [flags] Bit field containing various flags about the function. 93 DECL_INT_ACCESSORS(flags) 94 95 DECL_PRINTER(JSRelativeTimeFormat) 96 DECL_VERIFIER(JSRelativeTimeFormat) 97 98 // Layout description. 99 static const int kJSRelativeTimeFormatOffset = JSObject::kHeaderSize; 100 static const int kLocaleOffset = kJSRelativeTimeFormatOffset + kPointerSize; 101 static const int kFormatterOffset = kLocaleOffset + kPointerSize; 102 static const int kFlagsOffset = kFormatterOffset + kPointerSize; 103 static const int kSize = kFlagsOffset + kPointerSize; 104 105 private: 106 static Style getStyle(const char* str); 107 static Numeric getNumeric(const char* str); 108 109 DISALLOW_IMPLICIT_CONSTRUCTORS(JSRelativeTimeFormat); 110 }; 111 112 } // namespace internal 113 } // namespace v8 114 115 #include "src/objects/object-macros-undef.h" 116 117 #endif // V8_OBJECTS_JS_RELATIVE_TIME_FORMAT_H_ 118
