tor-browser

The Tor Browser
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DisplayNames.h (2440B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
      2 * vim: set ts=8 sts=2 et sw=2 tw=80:
      3 * This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef builtin_intl_DisplayNames_h
      8 #define builtin_intl_DisplayNames_h
      9 
     10 #include <stddef.h>
     11 #include <stdint.h>
     12 
     13 #include "jstypes.h"
     14 #include "NamespaceImports.h"
     15 
     16 #include "builtin/SelfHostingDefines.h"
     17 #include "js/Class.h"  // JSClass, JSClassOps, js::ClassSpec
     18 #include "js/TypeDecls.h"
     19 #include "js/Value.h"
     20 #include "vm/NativeObject.h"
     21 
     22 struct JS_PUBLIC_API JSContext;
     23 
     24 namespace mozilla::intl {
     25 class DisplayNames;
     26 }
     27 
     28 namespace js {
     29 struct ClassSpec;
     30 
     31 class DisplayNamesObject : public NativeObject {
     32 public:
     33  static const JSClass class_;
     34  static const JSClass& protoClass_;
     35 
     36  static constexpr uint32_t INTERNALS_SLOT = 0;
     37  static constexpr uint32_t LOCALE_DISPLAY_NAMES_SLOT = 1;
     38  static constexpr uint32_t SLOT_COUNT = 3;
     39 
     40  static_assert(INTERNALS_SLOT == INTL_INTERNALS_OBJECT_SLOT,
     41                "INTERNALS_SLOT must match self-hosting define for internals "
     42                "object slot");
     43 
     44  // Estimated memory use for ULocaleDisplayNames (see IcuMemoryUsage).
     45  static constexpr size_t EstimatedMemoryUse = 1238;
     46 
     47  mozilla::intl::DisplayNames* getDisplayNames() const {
     48    const auto& slot = getFixedSlot(LOCALE_DISPLAY_NAMES_SLOT);
     49    if (slot.isUndefined()) {
     50      return nullptr;
     51    }
     52    return static_cast<mozilla::intl::DisplayNames*>(slot.toPrivate());
     53  }
     54 
     55  void setDisplayNames(mozilla::intl::DisplayNames* displayNames) {
     56    setFixedSlot(LOCALE_DISPLAY_NAMES_SLOT, PrivateValue(displayNames));
     57  }
     58 
     59 private:
     60  static const JSClassOps classOps_;
     61  static const ClassSpec classSpec_;
     62 
     63  static void finalize(JS::GCContext* gcx, JSObject* obj);
     64 };
     65 
     66 /**
     67 * Return the display name for the requested code or undefined if no applicable
     68 * display name was found.
     69 *
     70 * Usage: result = intl_ComputeDisplayName(displayNames, locale, calendar,
     71 *                                         style, languageDisplay, fallback,
     72 *                                         type, code)
     73 */
     74 [[nodiscard]] extern bool intl_ComputeDisplayName(JSContext* cx, unsigned argc,
     75                                                  Value* vp);
     76 
     77 }  // namespace js
     78 
     79 #endif /* builtin_intl_DisplayNames_h */