1/*
2 * Copyright (C) 2019 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "ScrollTypes.h"
29
30namespace WebCore {
31
32typedef unsigned SynchronousScrollingReasons;
33
34enum class ScrollingNodeType : uint8_t {
35 MainFrame,
36 Subframe,
37 FrameHosting,
38 Overflow,
39 Fixed,
40 Sticky,
41 Positioned,
42};
43
44enum ScrollingStateTreeAsTextBehaviorFlags {
45 ScrollingStateTreeAsTextBehaviorNormal = 0,
46 ScrollingStateTreeAsTextBehaviorIncludeLayerIDs = 1 << 0,
47 ScrollingStateTreeAsTextBehaviorIncludeNodeIDs = 1 << 1,
48 ScrollingStateTreeAsTextBehaviorIncludeLayerPositions = 1 << 2,
49 ScrollingStateTreeAsTextBehaviorDebug = ScrollingStateTreeAsTextBehaviorIncludeLayerIDs | ScrollingStateTreeAsTextBehaviorIncludeNodeIDs | ScrollingStateTreeAsTextBehaviorIncludeLayerPositions
50};
51typedef unsigned ScrollingStateTreeAsTextBehavior;
52
53enum class ScrollingLayerPositionAction {
54 Set,
55 SetApproximate,
56 Sync
57};
58
59struct ScrollableAreaParameters {
60 ScrollElasticity horizontalScrollElasticity { ScrollElasticityNone };
61 ScrollElasticity verticalScrollElasticity { ScrollElasticityNone };
62
63 ScrollbarMode horizontalScrollbarMode { ScrollbarAuto };
64 ScrollbarMode verticalScrollbarMode { ScrollbarAuto };
65
66 bool hasEnabledHorizontalScrollbar { false };
67 bool hasEnabledVerticalScrollbar { false };
68
69 bool horizontalScrollbarHiddenByStyle { false };
70 bool verticalScrollbarHiddenByStyle { false };
71
72 bool useDarkAppearanceForScrollbars { false };
73
74 bool operator==(const ScrollableAreaParameters& other) const
75 {
76 return horizontalScrollElasticity == other.horizontalScrollElasticity
77 && verticalScrollElasticity == other.verticalScrollElasticity
78 && horizontalScrollbarMode == other.horizontalScrollbarMode
79 && verticalScrollbarMode == other.verticalScrollbarMode
80 && hasEnabledHorizontalScrollbar == other.hasEnabledHorizontalScrollbar
81 && hasEnabledVerticalScrollbar == other.hasEnabledVerticalScrollbar
82 && useDarkAppearanceForScrollbars == other.useDarkAppearanceForScrollbars;
83 }
84};
85
86enum class ScrollingEventResult {
87 DidNotHandleEvent,
88 DidHandleEvent,
89 SendToMainThread
90};
91
92enum class ViewportRectStability {
93 Stable,
94 Unstable,
95 ChangingObscuredInsetsInteractively // This implies Unstable.
96};
97
98}
99