#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_SPATIAL_NAVIGATION_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_SPATIAL_NAVIGATION_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/core/layout/geometry/physical_rect.h"
#include <limits>
namespace blink {
class LocalFrame;
class HTMLAreaElement;
class HTMLFrameOwnerElement;
enum class SpatialNavigationDirection { … };
constexpr double kMaxDistance = …;
CORE_EXPORT bool IsSpatialNavigationEnabled(const LocalFrame*);
struct CORE_EXPORT FocusCandidate { … };
CORE_EXPORT bool HasRemoteFrame(const Node*);
CORE_EXPORT int LineBoxes(const LayoutObject& layout_object);
CORE_EXPORT
bool IsFragmentedInline(const LayoutObject& layout_object);
CORE_EXPORT gfx::RectF RectInViewport(const Node&);
CORE_EXPORT bool IsOffscreen(const Node*);
CORE_EXPORT bool IsUnobscured(const FocusCandidate&);
bool ScrollInDirection(Node* container, SpatialNavigationDirection);
CORE_EXPORT bool IsScrollableNode(const Node* node);
CORE_EXPORT bool IsScrollableAreaOrDocument(const Node*);
CORE_EXPORT Node* ScrollableAreaOrDocumentOf(Node*);
bool CanScrollInDirection(const Node* container, SpatialNavigationDirection);
bool CanScrollInDirection(const LocalFrame*, SpatialNavigationDirection);
double ComputeDistanceDataForNode(SpatialNavigationDirection,
const FocusCandidate& current_interest,
const FocusCandidate& candidate);
CORE_EXPORT PhysicalRect NodeRectInRootFrame(const Node*);
CORE_EXPORT PhysicalRect OppositeEdge(SpatialNavigationDirection side,
const PhysicalRect& box,
LayoutUnit thickness = LayoutUnit());
CORE_EXPORT PhysicalRect RootViewport(const LocalFrame*);
PhysicalRect StartEdgeForAreaElement(const HTMLAreaElement&,
SpatialNavigationDirection);
HTMLFrameOwnerElement* FrameOwnerElement(const FocusCandidate&);
CORE_EXPORT PhysicalRect
ShrinkInlineBoxToLineBox(const LayoutObject& layout_object,
PhysicalRect visible_part,
int line_boxes = -1);
CORE_EXPORT PhysicalRect
SearchOriginFragment(const PhysicalRect& visible_part,
const LayoutObject& fragmented,
const SpatialNavigationDirection direction);
CORE_EXPORT PhysicalRect SearchOrigin(const PhysicalRect&,
Node*,
const SpatialNavigationDirection);
}
#endif