зеркало из https://github.com/mozilla/gecko-dev.git
82 строки
3.0 KiB
C++
82 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 ScrollbarStyles_h
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#define ScrollbarStyles_h
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#include <stdint.h>
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#include "nsStyleConsts.h" // for NS_STYLE_SCROLL_SNAP_*
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#include "nsStyleCoord.h" // for nsStyleCoord
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#include "mozilla/dom/WindowBinding.h"
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// Forward declarations
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struct nsStyleDisplay;
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namespace mozilla {
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struct ScrollbarStyles
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{
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// Always one of NS_STYLE_OVERFLOW_SCROLL, NS_STYLE_OVERFLOW_HIDDEN,
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// or NS_STYLE_OVERFLOW_AUTO.
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uint8_t mHorizontal;
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uint8_t mVertical;
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// Always one of NS_STYLE_SCROLL_BEHAVIOR_AUTO or
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// NS_STYLE_SCROLL_BEHAVIOR_SMOOTH
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uint8_t mScrollBehavior;
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// Always one of NS_STYLE_SCROLL_SNAP_NONE, NS_STYLE_SCROLL_SNAP_MANDATORY,
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// or NS_STYLE_SCROLL_SNAP_PROXIMITY.
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uint8_t mScrollSnapTypeX;
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uint8_t mScrollSnapTypeY;
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nsStyleCoord mScrollSnapPointsX;
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nsStyleCoord mScrollSnapPointsY;
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nsStyleCoord::CalcValue mScrollSnapDestinationX;
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nsStyleCoord::CalcValue mScrollSnapDestinationY;
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ScrollbarStyles(uint8_t aH, uint8_t aV)
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: mHorizontal(aH), mVertical(aV),
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mScrollBehavior(NS_STYLE_SCROLL_BEHAVIOR_AUTO),
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mScrollSnapTypeX(NS_STYLE_SCROLL_SNAP_TYPE_NONE),
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mScrollSnapTypeY(NS_STYLE_SCROLL_SNAP_TYPE_NONE),
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mScrollSnapPointsX(nsStyleCoord(eStyleUnit_None)),
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mScrollSnapPointsY(nsStyleCoord(eStyleUnit_None)) {
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mScrollSnapDestinationX.mPercent = 0;
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mScrollSnapDestinationX.mLength = nscoord(0.0f);
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mScrollSnapDestinationX.mHasPercent = false;
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mScrollSnapDestinationY.mPercent = 0;
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mScrollSnapDestinationY.mLength = nscoord(0.0f);
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mScrollSnapDestinationY.mHasPercent = false;
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}
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explicit ScrollbarStyles(const nsStyleDisplay* aDisplay);
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ScrollbarStyles(uint8_t aH, uint8_t aV, const nsStyleDisplay* aDisplay);
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bool operator==(const ScrollbarStyles& aStyles) const {
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return aStyles.mHorizontal == mHorizontal && aStyles.mVertical == mVertical &&
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aStyles.mScrollBehavior == mScrollBehavior &&
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aStyles.mScrollSnapTypeX == mScrollSnapTypeX &&
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aStyles.mScrollSnapTypeY == mScrollSnapTypeY &&
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aStyles.mScrollSnapPointsX == mScrollSnapPointsX &&
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aStyles.mScrollSnapPointsY == mScrollSnapPointsY &&
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aStyles.mScrollSnapDestinationX == mScrollSnapDestinationX &&
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aStyles.mScrollSnapDestinationY == mScrollSnapDestinationY;
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}
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bool operator!=(const ScrollbarStyles& aStyles) const {
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return !(*this == aStyles);
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}
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bool IsHiddenInBothDirections() const {
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return mHorizontal == NS_STYLE_OVERFLOW_HIDDEN &&
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mVertical == NS_STYLE_OVERFLOW_HIDDEN;
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}
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bool IsSmoothScroll(dom::ScrollBehavior aBehavior) const {
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return aBehavior == dom::ScrollBehavior::Smooth ||
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(aBehavior == dom::ScrollBehavior::Auto &&
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mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH);
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}
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};
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} // namespace mozilla
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#endif
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