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// Copyright 2014 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 CHROME_BROWSER_UI_ASH_ACCESSIBILITY_AUTOMATION_MANAGER_ASH_H_
#define CHROME_BROWSER_UI_ASH_ACCESSIBILITY_AUTOMATION_MANAGER_ASH_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/extensions/api/automation_internal/automation_action_adapter.h"
#include "chrome/browser/ui/ash/accessibility/ax_tree_source_ash.h"
#include "ui/accessibility/ax_tree_serializer.h"
template <typename T> struct DefaultSingletonTraits;
namespace content {
class BrowserContext;
} // namespace content
namespace views {
class AXAuraObjWrapper;
class View;
} // namespace views
// Manages a tree of automation nodes.
class AutomationManagerAsh : public extensions::AutomationActionAdapter {
public:
// Get the single instance of this class.
static AutomationManagerAsh* GetInstance();
// Enable automation support for views.
void Enable(content::BrowserContext* context);
// Disable automation support for views.
void Disable();
// Handle an event fired upon a |View|.
void HandleEvent(content::BrowserContext* context,
views::View* view,
ui::AXEvent event_type);
// AutomationActionAdapter implementation.
virtual void DoDefault(int32 id) override;
virtual void Focus(int32 id) override;
virtual void MakeVisible(int32 id) override;
virtual void SetSelection(int32 id, int32 start, int32 end) override;
protected:
virtual ~AutomationManagerAsh();
private:
friend struct DefaultSingletonTraits<AutomationManagerAsh>;
AutomationManagerAsh();
// Reset all state in this manager.
void Reset();
void SendEvent(content::BrowserContext* context,
views::AXAuraObjWrapper* aura_obj,
ui::AXEvent event_type);
// Whether automation support for views is enabled.
bool enabled_;
// Holds the active views-based accessibility tree. A tree currently consists
// of all views descendant to a |Widget| (see |AXTreeSourceViews|).
// A tree becomes active when an event is fired on a descendant view.
scoped_ptr <AXTreeSourceAsh> current_tree_;
// Serializes incremental updates on the currently active tree
// |current_tree_|.
scoped_ptr<ui::AXTreeSerializer<views::AXAuraObjWrapper*> >
current_tree_serializer_;
DISALLOW_COPY_AND_ASSIGN(AutomationManagerAsh);
};
#endif // CHROME_BROWSER_UI_ASH_ACCESSIBILITY_AUTOMATION_MANAGER_ASH_H_
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