tools/profiler/core/PageInformation.cpp

   1 /* -*- Mode: C++; tab-width: 2; 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 "PageInformation.h"
   8
   9 #include "mozilla/ProfileJSONWriter.h"
  10
  11 PageInformation::PageInformation(uint64_t aTabID, uint64_t aInnerWindowID,
  12                                  const nsCString& aUrl,
  13                                  uint64_t aEmbedderInnerWindowID,
  14                                  bool aIsPrivateBrowsing)
  15     : mTabID(aTabID),
  16       mInnerWindowID(aInnerWindowID),
  17       mUrl(aUrl),
  18       mEmbedderInnerWindowID(aEmbedderInnerWindowID),
  19       mIsPrivateBrowsing(aIsPrivateBrowsing) {}
  20
  21 bool PageInformation::Equals(PageInformation* aOtherPageInfo) const {
  22   // It's enough to check inner window IDs because they are unique for each
  23   // page. Therefore, we don't have to check the tab ID or url.
  24   return InnerWindowID() == aOtherPageInfo->InnerWindowID();
  25 }
  26
  27 void PageInformation::StreamJSON(SpliceableJSONWriter& aWriter) const {
  28   // Here, we are converting uint64_t to double. Both tab and Inner
  29   // Window IDs are created using `nsContentUtils::GenerateProcessSpecificId`,
  30   // which is specifically designed to only use 53 of the 64 bits to be lossless
  31   // when passed into and out of JS as a double.
  32   aWriter.StartObjectElement();
  33   aWriter.DoubleProperty("tabID", TabID());
  34   aWriter.DoubleProperty("innerWindowID", InnerWindowID());
  35   aWriter.StringProperty("url", Url());
  36   aWriter.DoubleProperty("embedderInnerWindowID", EmbedderInnerWindowID());
  37   aWriter.BoolProperty("isPrivateBrowsing", IsPrivateBrowsing());
  38   aWriter.EndObject();
  39 }
  40
  41 size_t PageInformation::SizeOfIncludingThis(
  42     mozilla::MallocSizeOf aMallocSizeOf) const {
  43   return aMallocSizeOf(this);
  44 }