chromium/ui/accessibility/ax_relative_bounds.h

// 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 UI_ACCESSIBILITY_AX_RELATIVE_BOUNDS_H_
#define UI_ACCESSIBILITY_AX_RELATIVE_BOUNDS_H_

#include <stdint.h>

#include <iosfwd>
#include <memory>

#include "ui/accessibility/ax_base_export.h"
#include "ui/accessibility/ax_enums.mojom-forward.h"
#include "ui/accessibility/ax_node_id_forward.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/transform.h"

namespace ui {

// The relative bounding box of an AXNode.
//
// This is an efficient, compact, serializable representation of a node's
// bounding box that requires minimal changes to the tree when layers are
// moved or scrolled. Computing the absolute bounding box of a node requires
// walking up the tree and applying node offsets and transforms until reaching
// the top.
//
// If the offset container id is valid, the bounds are relative
// to the node with that offset container id.
//
// Otherwise, for a node other than the root, the bounds are relative to
// the root of the tree, and for the root of a tree, the bounds are relative
// to its immediate containing node.
struct AX_BASE_EXPORT AXRelativeBounds final { … };

AX_BASE_EXPORT std::ostream& operator<<(std::ostream& stream,
                                        const AXRelativeBounds& bounds);

}  // namespace ui

#endif  // UI_ACCESSIBILITY_AX_RELATIVE_BOUNDS_H_