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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_AURA_ACCESSIBILITY_AUTOMATION_MANAGER_AURA_H_
#define CHROME_BROWSER_UI_AURA_ACCESSIBILITY_AUTOMATION_MANAGER_AURA_H_
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "chrome/browser/extensions/api/automation_internal/automation_action_adapter.h"
#include "chrome/browser/ui/aura/accessibility/ax_tree_source_aura.h"
#include "ui/accessibility/ax_tree_serializer.h"
#include "ui/views/accessibility/ax_aura_obj_cache.h"
namespace base {
template <typename T>
struct DefaultSingletonTraits;
} // namespace base
namespace content {
class BrowserContext;
} // namespace content
namespace views {
class AXAuraObjWrapper;
class View;
} // namespace views
using AuraAXTreeSerializer =
ui::AXTreeSerializer<views::AXAuraObjWrapper*,
ui::AXNodeData,
ui::AXTreeData>;
// Manages a tree of automation nodes.
class AutomationManagerAura : public extensions::AutomationActionAdapter,
views::AXAuraObjCache::Delegate {
public:
// Get the single instance of this class.
static AutomationManagerAura* 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);
void HandleAlert(content::BrowserContext* context, const std::string& text);
// AutomationActionAdapter implementation.
void PerformAction(const ui::AXActionData& data) override;
// views::AXAuraObjCache::Delegate implementation.
void OnChildWindowRemoved(views::AXAuraObjWrapper* parent) override;
protected:
AutomationManagerAura();
virtual ~AutomationManagerAura();
private:
friend struct base::DefaultSingletonTraits<AutomationManagerAura>;
// Reset state in this manager. If |reset_serializer| is true, reset the
// serializer to save memory.
void Reset(bool reset_serializer);
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.
std::unique_ptr<AXTreeSourceAura> current_tree_;
// Serializes incremental updates on the currently active tree
// |current_tree_|.
std::unique_ptr<AuraAXTreeSerializer> current_tree_serializer_;
bool processing_events_;
std::vector<std::pair<views::AXAuraObjWrapper*, ui::AXEvent>> pending_events_;
DISALLOW_COPY_AND_ASSIGN(AutomationManagerAura);
};
#endif // CHROME_BROWSER_UI_AURA_ACCESSIBILITY_AUTOMATION_MANAGER_AURA_H_
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