124 lines
4.8 KiB
C++
124 lines
4.8 KiB
C++
/*
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* Copyright (C) 2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ScrollTypes.h"
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#include <wtf/EnumTraits.h>
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namespace WebCore {
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enum class SynchronousScrollingReason {
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// Flags for frame scrolling.
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ForcedOnMainThread = 1 << 0,
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HasViewportConstrainedObjectsWithoutSupportingFixedLayers = 1 << 1,
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HasNonLayerViewportConstrainedObjects = 1 << 2,
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IsImageDocument = 1 << 3,
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// Flags for frame and overflow scrolling.
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HasSlowRepaintObjects = 1 << 4,
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DescendantScrollersHaveSynchronousScrolling = 1 << 5,
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};
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enum class ScrollingNodeType : uint8_t {
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MainFrame,
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Subframe,
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FrameHosting,
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Overflow,
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OverflowProxy,
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Fixed,
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Sticky,
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Positioned
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};
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enum ScrollingStateTreeAsTextBehaviorFlags {
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ScrollingStateTreeAsTextBehaviorNormal = 0,
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ScrollingStateTreeAsTextBehaviorIncludeLayerIDs = 1 << 0,
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ScrollingStateTreeAsTextBehaviorIncludeNodeIDs = 1 << 1,
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ScrollingStateTreeAsTextBehaviorIncludeLayerPositions = 1 << 2,
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ScrollingStateTreeAsTextBehaviorDebug = ScrollingStateTreeAsTextBehaviorIncludeLayerIDs | ScrollingStateTreeAsTextBehaviorIncludeNodeIDs | ScrollingStateTreeAsTextBehaviorIncludeLayerPositions
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};
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typedef unsigned ScrollingStateTreeAsTextBehavior;
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enum class ScrollingLayerPositionAction {
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Set,
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SetApproximate,
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Sync
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};
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struct ScrollableAreaParameters {
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ScrollElasticity horizontalScrollElasticity { ScrollElasticityNone };
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ScrollElasticity verticalScrollElasticity { ScrollElasticityNone };
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ScrollbarMode horizontalScrollbarMode { ScrollbarAuto };
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ScrollbarMode verticalScrollbarMode { ScrollbarAuto };
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bool allowsHorizontalScrolling { false };
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bool allowsVerticalScrolling { false };
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bool horizontalScrollbarHiddenByStyle { false };
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bool verticalScrollbarHiddenByStyle { false };
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bool useDarkAppearanceForScrollbars { false };
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bool operator==(const ScrollableAreaParameters& other) const
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{
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return horizontalScrollElasticity == other.horizontalScrollElasticity
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&& verticalScrollElasticity == other.verticalScrollElasticity
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&& horizontalScrollbarMode == other.horizontalScrollbarMode
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&& verticalScrollbarMode == other.verticalScrollbarMode
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&& allowsHorizontalScrolling == other.allowsHorizontalScrolling
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&& allowsVerticalScrolling == other.allowsVerticalScrolling
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&& horizontalScrollbarHiddenByStyle == other.horizontalScrollbarHiddenByStyle
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&& verticalScrollbarHiddenByStyle == other.verticalScrollbarHiddenByStyle
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&& useDarkAppearanceForScrollbars == other.useDarkAppearanceForScrollbars;
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}
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};
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enum class ViewportRectStability {
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Stable,
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Unstable,
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ChangingObscuredInsetsInteractively // This implies Unstable.
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};
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} // namespace WebCore
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namespace WTF {
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template<> struct EnumTraits<WebCore::ScrollingNodeType> {
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using values = EnumValues<
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WebCore::ScrollingNodeType,
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WebCore::ScrollingNodeType::MainFrame,
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WebCore::ScrollingNodeType::Subframe,
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WebCore::ScrollingNodeType::FrameHosting,
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WebCore::ScrollingNodeType::Overflow,
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WebCore::ScrollingNodeType::OverflowProxy,
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WebCore::ScrollingNodeType::Fixed,
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WebCore::ScrollingNodeType::Sticky,
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WebCore::ScrollingNodeType::Positioned
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>;
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};
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} // namespace WTF
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