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// Copyright 2021 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_PLATFORM_AX_PLATFORM_TREE_MANAGER_H_
#define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_TREE_MANAGER_H_
#include "base/component_export.h"
#include "base/memory/weak_ptr.h"
#include "ui/accessibility/ax_node.h"
#include "ui/accessibility/ax_tree_manager.h"
namespace ui {
class AXPlatformNode;
class AXPlatformNodeDelegate;
// Abstract interface for a class that manages AXPlatformNodes and is
// able to query for them via `GetPlatformNodeFromTree`. Extends
// AXTreeManager, so AXNodes are also managed.
class COMPONENT_EXPORT(AX_PLATFORM) AXPlatformTreeManager
: public AXTreeManager {
public:
explicit AXPlatformTreeManager(std::unique_ptr<AXTree> tree);
AXPlatformTreeManager(const AXPlatformTreeManager&) = delete;
AXPlatformTreeManager& operator=(const AXPlatformTreeManager&) = delete;
~AXPlatformTreeManager() override;
// Returns an AXPlatformNode with the specified and |node_id|.
virtual AXPlatformNode* GetPlatformNodeFromTree(AXNodeID node_id) const = 0;
// Returns an AXPlatformNode that corresponds to the given |node|.
virtual AXPlatformNode* GetPlatformNodeFromTree(const AXNode& node) const = 0;
// Returns an AXPlatformNodeDelegate that corresponds to a root node
// of the accessibility tree.
virtual AXPlatformNodeDelegate* RootDelegate() const = 0;
bool IsPlatformTreeManager() const override;
base::WeakPtr<AXPlatformTreeManager> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
// Fire a sentinel event and wait until it is received, to ensure all pending
// notifications are processed.
// Note: not all platforms need this. For example, IA2 can listen to events
// synchronously.
virtual void FireSentinelEventForTesting();
private:
base::WeakPtrFactory<AXPlatformTreeManager> weak_ptr_factory_{this};
};
} // namespace ui
#endif // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_TREE_MANAGER_H_
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