layout/style/URLExtraData.cpp

   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 /* thread-safe container of information for resolving url values */
   8
   9 #include "mozilla/URLExtraData.h"
  10
  11 #include "mozilla/NullPrincipal.h"
  12 #include "nsAboutProtocolUtils.h"
  13 #include "ReferrerInfo.h"
  14
  15 namespace mozilla {
  16
  17 StaticRefPtr<URLExtraData> URLExtraData::sDummy;
  18 StaticRefPtr<URLExtraData> URLExtraData::sDummyChrome;
  19
  20 /* static */
  21 void URLExtraData::Init() {
  22   RefPtr<nsIURI> baseURI = NullPrincipal::CreateURI();
  23   nsCOMPtr<nsIReferrerInfo> referrerInfo = new dom::ReferrerInfo(nullptr);
  24   sDummy = new URLExtraData(do_AddRef(baseURI), do_AddRef(referrerInfo),
  25                             NullPrincipal::CreateWithoutOriginAttributes());
  26
  27   sDummyChrome =
  28       new URLExtraData(baseURI.forget(), referrerInfo.forget(),
  29                        NullPrincipal::CreateWithoutOriginAttributes());
  30   sDummyChrome->mChromeRulesEnabled = true;
  31 }
  32
  33 bool URLExtraData::ChromeRulesEnabled(nsIURI* aURI) {
  34   if (!aURI) {
  35     return false;
  36   }
  37   return aURI->SchemeIs("chrome") || aURI->SchemeIs("resource") ||
  38          (aURI->SchemeIs("about") && !NS_IsContentAccessibleAboutURI(aURI));
  39 }
  40
  41 /* static */
  42 void URLExtraData::Shutdown() {
  43   sDummy = nullptr;
  44   sDummyChrome = nullptr;
  45 }
  46
  47 URLExtraData::~URLExtraData() = default;
  48
  49 StaticRefPtr<URLExtraData>
  50     URLExtraData::sShared[size_t(UserAgentStyleSheetID::Count)];
  51
  52 }  // namespace mozilla