gecko-dev/layout/painting/DisplayListChecker.h

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1.4 KiB
C++

/* -*- 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__