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// Copyright 2016 The Chromium Authors
// 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 <optional>
#include "cc/base/region.h"
#include "cc/cc_export.h"
#include "cc/input/main_thread_scrolling_reason.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 "cc/trees/property_ids.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 = kInvalidPropertyNodeId;
// The node index of the parent node in the scroll tree node vector.
int parent_id = kInvalidPropertyNodeId;
uint32_t main_thread_repaint_reasons =
MainThreadScrollingReason::kNotScrollingOnMain;
// Size of the container area that the contents scrolls in, not including
// non-overlay scrollbars. Overlay scrollbars do not affect these bounds.
// Note, use the ScrollTree::container_bounds function for the viewport
// scroll nodes to include the current bounds change due to top controls
// hiding / showing.
gfx::Size container_bounds;
// Size of the content that is scrolled within the container bounds.
gfx::Size bounds;
bool max_scroll_offset_affected_by_page_scale : 1 = false;
bool scrolls_inner_viewport : 1 = false;
bool scrolls_outer_viewport : 1 = false;
bool prevent_viewport_scrolling_from_inner : 1 = false;
bool user_scrollable_horizontal : 1 = false;
bool user_scrollable_vertical : 1 = false;
bool is_composited : 1 = false;
ElementId element_id;
// The transform node containing the scroll offset.
int transform_id = kRootPropertyNodeId;
// The container area origin in the parent transform space of transform_id.
gfx::Point container_origin;
OverscrollBehavior overscroll_behavior{OverscrollBehavior::Type::kAuto};
std::optional<SnapContainerData> snap_container_data;
#if DCHECK_IS_ON()
bool operator==(const ScrollNode& other) const;
#endif
void AsValueInto(base::trace_event::TracedValue* value) const;
};
} // namespace cc
#endif // CC_TREES_SCROLL_NODE_H_
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