| // Copyright 2018 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_INTL_SUPPORT |
| #error Internationalization is expected to be enabled. |
| #endif // V8_INTL_SUPPORT |
| |
| #ifndef V8_OBJECTS_JS_SEGMENTER_H_ |
| #define V8_OBJECTS_JS_SEGMENTER_H_ |
| |
| #include <set> |
| #include <string> |
| |
| #include "src/heap/factory.h" |
| #include "src/isolate.h" |
| #include "src/objects.h" |
| #include "src/objects/managed.h" |
| #include "unicode/uversion.h" |
| |
| // Has to be the last include (doesn't have include guards): |
| #include "src/objects/object-macros.h" |
| |
| namespace U_ICU_NAMESPACE { |
| class BreakIterator; |
| } |
| |
| namespace v8 { |
| namespace internal { |
| |
| class JSSegmenter : public JSObject { |
| public: |
| // Initializes segmenter object with properties derived from input |
| // locales and options. |
| V8_WARN_UNUSED_RESULT static MaybeHandle<JSSegmenter> Initialize( |
| Isolate* isolate, Handle<JSSegmenter> segmenter_holder, |
| Handle<Object> locales, Handle<Object> options); |
| |
| V8_WARN_UNUSED_RESULT static Handle<JSObject> ResolvedOptions( |
| Isolate* isolate, Handle<JSSegmenter> segmenter_holder); |
| |
| static std::set<std::string> GetAvailableLocales(); |
| |
| Handle<String> LineBreakStyleAsString() const; |
| const char* LineBreakStyleAsCString() const; |
| Handle<String> GranularityAsString() const; |
| |
| DECL_CAST2(JSSegmenter) |
| |
| // Segmenter accessors. |
| DECL_ACCESSORS2(locale, String) |
| |
| DECL_ACCESSORS(icu_break_iterator, Managed<icu::BreakIterator>) |
| |
| // LineBreakStyle: identifying the style used for line break. |
| // |
| // ecma402 #sec-segmenter-internal-slots |
| |
| enum class LineBreakStyle { |
| NOTSET, // While the granularity is not LINE |
| STRICT, // CSS level 3 line-break=strict, e.g. treat CJ as NS |
| NORMAL, // CSS level 3 line-break=normal, e.g. treat CJ as ID, break before |
| // hyphens for ja,zh |
| LOOSE, // CSS level 3 line-break=loose |
| COUNT |
| }; |
| inline void set_line_break_style(LineBreakStyle line_break_style); |
| inline LineBreakStyle line_break_style() const; |
| |
| // Granularity: identifying the segmenter used. |
| // |
| // ecma402 #sec-segmenter-internal-slots |
| enum class Granularity { |
| GRAPHEME, // for character-breaks |
| WORD, // for word-breaks |
| SENTENCE, // for sentence-breaks |
| LINE, // for line-breaks |
| COUNT |
| }; |
| inline void set_granularity(Granularity granularity); |
| inline Granularity granularity() const; |
| |
| // Bit positions in |flags|. |
| #define FLAGS_BIT_FIELDS(V, _) \ |
| V(LineBreakStyleBits, LineBreakStyle, 3, _) \ |
| V(GranularityBits, Granularity, 3, _) |
| DEFINE_BIT_FIELDS(FLAGS_BIT_FIELDS) |
| #undef FLAGS_BIT_FIELDS |
| |
| STATIC_ASSERT(LineBreakStyle::NOTSET <= LineBreakStyleBits::kMax); |
| STATIC_ASSERT(LineBreakStyle::STRICT <= LineBreakStyleBits::kMax); |
| STATIC_ASSERT(LineBreakStyle::NORMAL <= LineBreakStyleBits::kMax); |
| STATIC_ASSERT(LineBreakStyle::LOOSE <= LineBreakStyleBits::kMax); |
| STATIC_ASSERT(Granularity::GRAPHEME <= GranularityBits::kMax); |
| STATIC_ASSERT(Granularity::WORD <= GranularityBits::kMax); |
| STATIC_ASSERT(Granularity::SENTENCE <= GranularityBits::kMax); |
| STATIC_ASSERT(Granularity::LINE <= GranularityBits::kMax); |
| |
| // [flags] Bit field containing various flags about the function. |
| DECL_INT_ACCESSORS(flags) |
| |
| DECL_PRINTER(JSSegmenter) |
| DECL_VERIFIER(JSSegmenter) |
| |
| // Layout description. |
| #define JS_SEGMENTER_FIELDS(V) \ |
| V(kJSSegmenterOffset, kTaggedSize) \ |
| V(kLocaleOffset, kTaggedSize) \ |
| V(kICUBreakIteratorOffset, kTaggedSize) \ |
| V(kFlagsOffset, kTaggedSize) \ |
| /* Header size. */ \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, JS_SEGMENTER_FIELDS) |
| #undef JS_SEGMENTER_FIELDS |
| |
| private: |
| static LineBreakStyle GetLineBreakStyle(const char* str); |
| static Granularity GetGranularity(const char* str); |
| |
| OBJECT_CONSTRUCTORS(JSSegmenter, JSObject); |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| #endif // V8_OBJECTS_JS_SEGMENTER_H_ |