diff options
Diffstat (limited to 'layout/base/ScrollStyles.h')
-rw-r--r-- | layout/base/ScrollStyles.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/layout/base/ScrollStyles.h b/layout/base/ScrollStyles.h new file mode 100644 index 000000000..c5743ee6b --- /dev/null +++ b/layout/base/ScrollStyles.h @@ -0,0 +1,82 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 ScrollStyles_h +#define ScrollStyles_h + +#include <stdint.h> +#include "nsStyleConsts.h" // for NS_STYLE_SCROLL_SNAP_* +#include "nsStyleCoord.h" // for nsStyleCoord +#include "mozilla/dom/WindowBinding.h" + +// Forward declarations +struct nsStyleDisplay; + +namespace mozilla { + +struct ScrollStyles +{ + // Always one of NS_STYLE_OVERFLOW_SCROLL, NS_STYLE_OVERFLOW_HIDDEN, + // or NS_STYLE_OVERFLOW_AUTO. + uint8_t mHorizontal; + uint8_t mVertical; + // Always one of NS_STYLE_SCROLL_BEHAVIOR_AUTO or + // NS_STYLE_SCROLL_BEHAVIOR_SMOOTH + uint8_t mScrollBehavior; + // Always one of NS_STYLE_SCROLL_SNAP_NONE, NS_STYLE_SCROLL_SNAP_MANDATORY, + // or NS_STYLE_SCROLL_SNAP_PROXIMITY. + uint8_t mScrollSnapTypeX; + uint8_t mScrollSnapTypeY; + nsStyleCoord mScrollSnapPointsX; + nsStyleCoord mScrollSnapPointsY; + nsStyleCoord::CalcValue mScrollSnapDestinationX; + nsStyleCoord::CalcValue mScrollSnapDestinationY; + + ScrollStyles(uint8_t aH, uint8_t aV) + : mHorizontal(aH), mVertical(aV), + mScrollBehavior(NS_STYLE_SCROLL_BEHAVIOR_AUTO), + mScrollSnapTypeX(NS_STYLE_SCROLL_SNAP_TYPE_NONE), + mScrollSnapTypeY(NS_STYLE_SCROLL_SNAP_TYPE_NONE), + mScrollSnapPointsX(nsStyleCoord(eStyleUnit_None)), + mScrollSnapPointsY(nsStyleCoord(eStyleUnit_None)) { + + mScrollSnapDestinationX.mPercent = 0; + mScrollSnapDestinationX.mLength = nscoord(0.0f); + mScrollSnapDestinationX.mHasPercent = false; + mScrollSnapDestinationY.mPercent = 0; + mScrollSnapDestinationY.mLength = nscoord(0.0f); + mScrollSnapDestinationY.mHasPercent = false; + } + + explicit ScrollStyles(const nsStyleDisplay* aDisplay); + ScrollStyles(uint8_t aH, uint8_t aV, const nsStyleDisplay* aDisplay); + ScrollStyles() {} + bool operator==(const ScrollStyles& aStyles) const { + return aStyles.mHorizontal == mHorizontal && aStyles.mVertical == mVertical && + aStyles.mScrollBehavior == mScrollBehavior && + aStyles.mScrollSnapTypeX == mScrollSnapTypeX && + aStyles.mScrollSnapTypeY == mScrollSnapTypeY && + aStyles.mScrollSnapPointsX == mScrollSnapPointsX && + aStyles.mScrollSnapPointsY == mScrollSnapPointsY && + aStyles.mScrollSnapDestinationX == mScrollSnapDestinationX && + aStyles.mScrollSnapDestinationY == mScrollSnapDestinationY; + } + bool operator!=(const ScrollStyles& aStyles) const { + return !(*this == aStyles); + } + bool IsHiddenInBothDirections() const { + return mHorizontal == NS_STYLE_OVERFLOW_HIDDEN && + mVertical == NS_STYLE_OVERFLOW_HIDDEN; + } + bool IsSmoothScroll(dom::ScrollBehavior aBehavior) const { + return aBehavior == dom::ScrollBehavior::Smooth || + (aBehavior == dom::ScrollBehavior::Auto && + mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH); + } +}; + +} // namespace mozilla + +#endif |