40 lines
1.2 KiB
C++
40 lines
1.2 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 mozilla_layers_ScrollingInteractionContext_h
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#define mozilla_layers_ScrollingInteractionContext_h
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#include "mozilla/EventForwards.h"
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#include "mozilla/layers/ScrollableLayerGuid.h"
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namespace mozilla {
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namespace layers {
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// The ScrollingInteractionContext is used to store minor details of the
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// current scrolling interaction on the stack to avoid having to pass them
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// though the callstack
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class MOZ_STACK_CLASS ScrollingInteractionContext {
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private:
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static bool sScrollingToAnchor;
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public:
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// Functions to access downwards-propagated data
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static bool IsScrollingToAnchor();
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// Constructor sets the data to be propagated downwards
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explicit ScrollingInteractionContext(bool aScrollingToAnchor);
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// Destructor restores the previous state
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~ScrollingInteractionContext();
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private:
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bool mOldScrollingToAnchor;
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};
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} // namespace layers
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} // namespace mozilla
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#endif /* mozilla_layers_ScrollingInteractionContext_h */
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