dom/html/FetchPriority.h

   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 mozilla_dom_FetchPriority_h
   8 #define mozilla_dom_FetchPriority_h
   9
  10 #include <cstdint>
  11
  12 namespace mozilla {
  13 class LazyLogModule;
  14
  15 namespace dom {
  16
  17 enum class RequestPriority : uint8_t;
  18
  19 // <https://html.spec.whatwg.org/multipage/urls-and-fetching.html#fetch-priority-attributes>.
  20 enum class FetchPriority : uint8_t { High, Low, Auto };
  21
  22 FetchPriority ToFetchPriority(RequestPriority aRequestPriority);
  23
  24 #define FETCH_PRIORITY_ADJUSTMENT_FOR(feature, fetchPriority)                  \
  25   (fetchPriority == FetchPriority::Auto                                        \
  26        ? StaticPrefs::network_fetchpriority_adjustments_##feature##_auto()     \
  27        : (fetchPriority == FetchPriority::High                                 \
  28               ? StaticPrefs::                                                  \
  29                     network_fetchpriority_adjustments_##feature##_high()       \
  30               : (fetchPriority == FetchPriority::Low                           \
  31                      ? StaticPrefs::                                           \
  32                            network_fetchpriority_adjustments_##feature##_low() \
  33                      : 0)))
  34
  35 // @param aSupportsPriority see <nsISupportsPriority.idl>.
  36 void LogPriorityMapping(LazyLogModule& aLazyLogModule,
  37                         FetchPriority aFetchPriority,
  38                         int32_t aSupportsPriority);
  39
  40 extern const char* kFetchPriorityAttributeValueHigh;
  41 extern const char* kFetchPriorityAttributeValueLow;
  42 extern const char* kFetchPriorityAttributeValueAuto;
  43
  44 }  // namespace dom
  45 }  // namespace mozilla
  46
  47 #endif  // mozilla_dom_FetchPriority_h