layout/painting/DisplayListChecker.h
author alwu <alwu@mozilla.com>
Mon, 07 Jan 2019 19:57:48 +0000
changeset 512757 0e229bbdaae5c8fa9f83796c628a4fdf88f057ba
parent 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1513039 - part5 : log warning when autoplay is blocked. r=cpearce,karlt Wrap 'nsContentUtils::ReportToConsole()' to reduce necessary input parameters and call it when we need to log error or warning message. Show the warning when autoplay is blocked. For web audio, this restores the console messages removed in part4 and also reports the same message when the AudioContext is blocked in the constructor. Differential Revision: https://phabricator.services.mozilla.com/D14330

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef DisplayListChecker_h__
#define DisplayListChecker_h__

#include <sstream>
#include <mozilla/UniquePtr.h>

class nsDisplayList;

namespace mozilla {

class DisplayListBlueprint;

class DisplayListChecker {
 public:
  DisplayListChecker();
  DisplayListChecker(nsDisplayList* aList, const char* aName);

  ~DisplayListChecker();

  void Set(nsDisplayList* aList, const char* aName);

  explicit operator bool() const { return mBlueprint.get(); }

  // Compare this list with another one, output differences between the two
  // into aDiff.
  // Differences include: Display items from one tree for which a corresponding
  // item (same frame and per-frame key) cannot be found under corresponding
  // parent items.
  // Returns true if trees are similar, false if different.
  bool CompareList(const DisplayListChecker& aOther,
                   std::stringstream& aDiff) const;

  // Output this tree to aSs.
  void Dump(std::stringstream& aSs) const;

 private:
  UniquePtr<DisplayListBlueprint> mBlueprint;
};

}  // namespace mozilla

#endif  // DisplayListChecker_h__