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// Copyright 2018 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 UI_VIEWS_ACCESSIBILITY_AX_TREE_SOURCE_VIEWS_H_
#define UI_VIEWS_ACCESSIBILITY_AX_TREE_SOURCE_VIEWS_H_
#include "base/macros.h"
#include "ui/accessibility/ax_tree_id.h"
#include "ui/accessibility/ax_tree_source.h"
#include "ui/views/views_export.h"
namespace ui {
struct AXActionData;
struct AXNodeData;
struct AXTreeData;
}
namespace views {
class AXAuraObjWrapper;
// This class exposes the views hierarchy as an accessibility tree permitting
// use with other accessibility classes. Subclasses must implement GetRoot().
// The root can be an existing object in the Widget/View hierarchy or a new node
// (for example to create the "desktop" node for the extension API call
// chrome.automation.getDesktop()).
class VIEWS_EXPORT AXTreeSourceViews
: public ui::
AXTreeSource<AXAuraObjWrapper*, ui::AXNodeData, ui::AXTreeData> {
public:
AXTreeSourceViews(AXAuraObjWrapper* root, const ui::AXTreeID& tree_id);
~AXTreeSourceViews() override;
// Invokes an action on an Aura object.
void HandleAccessibleAction(const ui::AXActionData& action);
// AXTreeSource:
bool GetTreeData(ui::AXTreeData* data) const override;
AXAuraObjWrapper* GetRoot() const override;
AXAuraObjWrapper* GetFromId(int32_t id) const override;
int32_t GetId(AXAuraObjWrapper* node) const override;
void GetChildren(AXAuraObjWrapper* node,
std::vector<AXAuraObjWrapper*>* out_children) const override;
AXAuraObjWrapper* GetParent(AXAuraObjWrapper* node) const override;
bool IsValid(AXAuraObjWrapper* node) const override;
bool IsEqual(AXAuraObjWrapper* node1, AXAuraObjWrapper* node2) const override;
AXAuraObjWrapper* GetNull() const override;
void SerializeNode(AXAuraObjWrapper* node,
ui::AXNodeData* out_data) const override;
// Useful for debugging.
std::string ToString(views::AXAuraObjWrapper* root, std::string prefix);
private:
// The top-level object to use for the AX tree. See class comment.
AXAuraObjWrapper* const root_ = nullptr;
// ID to use for the AX tree.
const ui::AXTreeID tree_id_;
DISALLOW_COPY_AND_ASSIGN(AXTreeSourceViews);
};
} // namespace views
#endif // UI_VIEWS_ACCESSIBILITY_AX_TREE_SOURCE_VIEWS_H_
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