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91a021aeb0
Setting the 'layout.display-list.retain.verify' gfxPrefs implies 'layout.display-list.build-twice', and then compares the retained-built tree to the non-retained one, and outputs differences&trees to the terminal. MozReview-Commit-ID: 3dnyIUTbtH8 --HG-- extra : rebase_source : 36a6b8f029d0bd1339557e7c630906311ecf1254
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DisplayListChecker_h__
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#define DisplayListChecker_h__
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#include <sstream>
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#include <mozilla/UniquePtr.h>
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class nsDisplayList;
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namespace mozilla {
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class DisplayListBlueprint;
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class DisplayListChecker
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{
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public:
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DisplayListChecker();
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DisplayListChecker(nsDisplayList* aList, const char* aName);
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~DisplayListChecker();
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void Set(nsDisplayList* aList, const char* aName);
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explicit operator bool() const { return mBlueprint.get(); }
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// Compare this list with another one, output differences between the two
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// into aDiff.
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// Differences include: Display items from one tree for which a corresponding
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// item (same frame and per-frame key) cannot be found under corresponding
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// parent items.
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// Returns true if trees are similar, false if different.
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bool CompareList(const DisplayListChecker& aOther,
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std::stringstream& aDiff) const;
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// Output this tree to aSs.
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void Dump(std::stringstream& aSs) const;
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private:
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UniquePtr<DisplayListBlueprint> mBlueprint;
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};
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} // namespace mozilla
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#endif // DisplayListChecker_h__
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