tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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FetchPriority.cpp (3000B)

      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 #include "mozilla/dom/FetchPriority.h"
      8 
      9 #include "mozilla/Assertions.h"
     10 #include "mozilla/Logging.h"
     11 #include "mozilla/dom/RequestBinding.h"
     12 #include "nsISupportsPriority.h"
     13 #include "nsStringFwd.h"
     14 
     15 namespace mozilla::dom {
     16 
     17 FetchPriority ToFetchPriority(RequestPriority aRequestPriority) {
     18  switch (aRequestPriority) {
     19    case RequestPriority::High: {
     20      return FetchPriority::High;
     21    }
     22    case RequestPriority::Low: {
     23      return FetchPriority::Low;
     24    }
     25    case RequestPriority::Auto: {
     26      return FetchPriority::Auto;
     27    }
     28    default: {
     29      MOZ_ASSERT_UNREACHABLE();
     30      return FetchPriority::Auto;
     31    }
     32  }
     33 }
     34 
     35 #ifdef DEBUG
     36 constexpr auto kPriorityHighest = "PRIORITY_HIGHEST"_ns;
     37 constexpr auto kPriorityHigh = "PRIORITY_HIGH"_ns;
     38 constexpr auto kPriorityNormal = "PRIORITY_NORMAL"_ns;
     39 constexpr auto kPriorityLow = "PRIORITY_LOW"_ns;
     40 constexpr auto kPriorityLowest = "PRIORITY_LOWEST"_ns;
     41 constexpr auto kPriorityUnknown = "UNKNOWN"_ns;
     42 
     43 /**
     44 * See <nsISupportsPriority.idl>.
     45 */
     46 static void SupportsPriorityToString(int32_t aSupportsPriority,
     47                                     nsACString& aResult) {
     48  switch (aSupportsPriority) {
     49    case nsISupportsPriority::PRIORITY_HIGHEST: {
     50      aResult = kPriorityHighest;
     51      break;
     52    }
     53    case nsISupportsPriority::PRIORITY_HIGH: {
     54      aResult = kPriorityHigh;
     55      break;
     56    }
     57    case nsISupportsPriority::PRIORITY_NORMAL: {
     58      aResult = kPriorityNormal;
     59      break;
     60    }
     61    case nsISupportsPriority::PRIORITY_LOW: {
     62      aResult = kPriorityLow;
     63      break;
     64    }
     65    case nsISupportsPriority::PRIORITY_LOWEST: {
     66      aResult = kPriorityLowest;
     67      break;
     68    }
     69    default: {
     70      aResult = kPriorityUnknown;
     71      break;
     72    }
     73  }
     74 }
     75 
     76 static const char* ToString(FetchPriority aFetchPriority) {
     77  switch (aFetchPriority) {
     78    case FetchPriority::Auto: {
     79      return kFetchPriorityAttributeValueAuto;
     80    }
     81    case FetchPriority::Low: {
     82      return kFetchPriorityAttributeValueLow;
     83    }
     84    case FetchPriority::High: {
     85      return kFetchPriorityAttributeValueHigh;
     86    }
     87    default: {
     88      MOZ_ASSERT_UNREACHABLE();
     89      return kFetchPriorityAttributeValueAuto;
     90    }
     91  }
     92 }
     93 #endif  // DEBUG
     94 
     95 void LogPriorityMapping(LazyLogModule& aLazyLogModule,
     96                        FetchPriority aFetchPriority,
     97                        int32_t aSupportsPriority) {
     98 #ifdef DEBUG
     99  nsDependentCString supportsPriority;
    100  SupportsPriorityToString(aSupportsPriority, supportsPriority);
    101  MOZ_LOG(aLazyLogModule, LogLevel::Debug,
    102          ("Mapping priority: %s -> %s", ToString(aFetchPriority),
    103           supportsPriority.get()));
    104 #endif  // DEBUG
    105 }
    106 }  // namespace mozilla::dom