HitTestInfo.h (1547B)
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 #ifndef GFX_HITTESTINFO_H 8 #define GFX_HITTESTINFO_H 9 10 #include "mozilla/gfx/CompositorHitTestInfo.h" 11 #include "mozilla/layers/ScrollableLayerGuid.h" 12 #include "nsRect.h" 13 14 class nsIFrame; 15 16 namespace mozilla { 17 18 class nsDisplayListBuilder; 19 struct ActiveScrolledRoot; 20 21 namespace wr { 22 class DisplayListBuilder; 23 } // namespace wr 24 25 /** 26 * A helper class that manages compositor hit testing information. 27 */ 28 class HitTestInfo { 29 public: 30 using CompositorHitTestInfo = gfx::CompositorHitTestInfo; 31 using ViewID = layers::ScrollableLayerGuid::ViewID; 32 33 ViewID GetViewId(wr::DisplayListBuilder& aBuilder, 34 const ActiveScrolledRoot* aASR) const; 35 36 void Initialize(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame); 37 void InitializeScrollTarget(nsDisplayListBuilder* aBuilder); 38 39 void SetAreaAndInfo(const nsRect& aArea, const CompositorHitTestInfo& aInfo) { 40 mArea = aArea; 41 mInfo = aInfo; 42 } 43 44 static void Shutdown(); 45 46 const nsRect& Area() const { return mArea; } 47 const CompositorHitTestInfo& Info() const { return mInfo; } 48 49 static const HitTestInfo& Empty(); 50 51 private: 52 nsRect mArea; 53 CompositorHitTestInfo mInfo; 54 mozilla::Maybe<ViewID> mScrollTarget; 55 }; 56 57 } // namespace mozilla 58 59 #endif