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// Copyright 2015 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_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_EVENT_ROUTER_H_
#define CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_EVENT_ROUTER_H_
#include <vector>
#include "base/macros.h"
#include "base/memory/singleton.h"
#include "chrome/common/extensions/api/automation_internal.h"
#include "content/public/browser/ax_event_notification_details.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "extensions/common/extension.h"
class Profile;
namespace content {
class BrowserContext;
} // namespace content
struct ExtensionMsg_AccessibilityEventParams;
namespace extensions {
struct AutomationListener;
class AutomationEventRouter : public content::NotificationObserver {
public:
static AutomationEventRouter* GetInstance();
// Indicates that the listener at |listener_process_id|, |listener_routing_id|
// wants to receive automation events from the accessibility tree indicated
// by |source_ax_tree_id|. Automation events are forwarded from now on
// until the listener process dies.
void RegisterListenerForOneTree(const ExtensionId& extension_id,
int listener_process_id,
int listener_routing_id,
int source_ax_tree_id);
// Indicates that the listener at |listener_process_id|, |listener_routing_id|
// wants to receive automation events from all accessibility trees because
// it has Desktop permission.
void RegisterListenerWithDesktopPermission(const ExtensionId& extension_id,
int listener_process_id,
int listener_routing_id);
void DispatchAccessibilityEvent(
const ExtensionMsg_AccessibilityEventParams& params);
// Notify all automation extensions that an accessibility tree was
// destroyed. If |browser_context| is null,
void DispatchTreeDestroyedEvent(
int tree_id,
content::BrowserContext* browser_context);
private:
struct AutomationListener {
AutomationListener();
AutomationListener(const AutomationListener& other);
~AutomationListener();
ExtensionId extension_id;
int routing_id;
int process_id;
bool desktop;
std::set<int> tree_ids;
bool is_active_profile;
};
AutomationEventRouter();
~AutomationEventRouter() override;
void Register(
const ExtensionId& extension_id,
int listener_process_id,
int listener_routing_id,
int source_ax_tree_id,
bool desktop);
// content::NotificationObserver interface.
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// Called when the user switches profiles or when a listener is added
// or removed. The purpose is to ensure that multiple instances of the
// same extension running in different profiles don't interfere with one
// another, so in that case only the one associated with the active profile
// is marked as active.
//
// This is needed on Chrome OS because ChromeVox loads into the login profile
// in addition to the active profile. If a similar fix is needed on other
// platforms, we'd need an equivalent of SessionStateObserver that works
// everywhere.
void UpdateActiveProfile();
content::NotificationRegistrar registrar_;
std::vector<AutomationListener> listeners_;
Profile* active_profile_;
friend struct base::DefaultSingletonTraits<AutomationEventRouter>;
DISALLOW_COPY_AND_ASSIGN(AutomationEventRouter);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_EVENT_ROUTER_H_
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