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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TREES_SCROLL_NODE_H_
#define CC_TREES_SCROLL_NODE_H_
#include "cc/base/region.h"
#include "cc/cc_export.h"
#include "cc/input/overscroll_behavior.h"
#include "cc/input/scroll_snap_data.h"
#include "cc/paint/element_id.h"
#include "cc/paint/filter_operations.h"
#include "ui/gfx/geometry/size.h"
namespace base {
namespace trace_event {
class TracedValue;
} // namespace trace_event
} // namespace base
namespace cc {
struct CC_EXPORT ScrollNode {
ScrollNode();
ScrollNode(const ScrollNode& other);
~ScrollNode();
// The node index of this node in the scroll tree node vector.
int id;
// The node index of the parent node in the scroll tree node vector.
int parent_id;
uint32_t main_thread_scrolling_reasons;
// Size of the container area that the contents scrolls in, not including
// non-overlay scrollbars. Overlay scrollbars do not affect these bounds.
gfx::Size container_bounds;
// Size of the content that is scrolled within the container bounds.
gfx::Size bounds;
// This is used for subtrees that should not be scrolled independently. For
// example, when there is a layer that is not scrollable itself but is inside
// a scrolling layer.
bool scrollable : 1;
bool max_scroll_offset_affected_by_page_scale : 1;
bool scrolls_inner_viewport : 1;
bool scrolls_outer_viewport : 1;
bool prevent_viewport_scrolling_from_inner : 1;
bool should_flatten : 1;
bool user_scrollable_horizontal : 1;
bool user_scrollable_vertical : 1;
// This offset is used when |scrollable| is false and there isn't a transform
// node already present that covers this offset. For layer tree mode only.
gfx::Vector2dF offset_to_transform_parent;
ElementId element_id;
int transform_id;
OverscrollBehavior overscroll_behavior;
base::Optional<SnapContainerData> snap_container_data;
bool is_composited : 1;
bool operator==(const ScrollNode& other) const;
void AsValueInto(base::trace_event::TracedValue* value) const;
};
} // namespace cc
#endif // CC_TREES_SCROLL_NODE_H_
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