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// Copyright 2013 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_CONTENT_SETTINGS_PERMISSION_QUEUE_CONTROLLER_H_
#define CHROME_BROWSER_CONTENT_SETTINGS_PERMISSION_QUEUE_CONTROLLER_H_
#include "base/bind.h"
#include "components/content_settings/core/common/content_settings_types.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class GURL;
class PermissionRequestID;
class InfoBarService;
class Profile;
// This class controls an infobar queue per profile, and it's used by
// GeolocationPermissionContext, and so on.
// An alternate approach would be to have this queue per tab, and use
// notifications to broadcast when permission is set / listen to notification to
// cancel pending requests. This may be specially useful if there are other
// things listening for such notifications.
// For the time being this class is self-contained and it doesn't seem pulling
// the notification infrastructure would simplify.
class PermissionQueueController : public content::NotificationObserver {
public:
typedef base::Callback<void(bool /* allowed */)> PermissionDecidedCallback;
PermissionQueueController(Profile* profile, ContentSettingsType type);
~PermissionQueueController() override;
// The InfoBar will be displayed immediately if the tab is not already
// displaying one, otherwise it'll be queued.
void CreateInfoBarRequest(const PermissionRequestID& id,
const GURL& requesting_frame,
const GURL& embedder,
PermissionDecidedCallback callback);
// Cancels a specific infobar request.
void CancelInfoBarRequest(const PermissionRequestID& id);
// Called by the InfoBarDelegate to notify permission has been set.
// It'll notify and dismiss any other pending InfoBar request for the same
// |requesting_frame| and embedder.
void OnPermissionSet(const PermissionRequestID& id,
const GURL& requesting_frame,
const GURL& embedder,
bool update_content_setting,
bool allowed);
// Performs the update to content settings for a particular request frame
// context.
void UpdateContentSetting(
const GURL& requesting_frame, const GURL& embedder, bool allowed);
protected:
// content::NotificationObserver:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
private:
class PendingInfobarRequest;
class RequestEquals;
typedef std::vector<PendingInfobarRequest> PendingInfobarRequests;
// Returns true if a geolocation infobar is already visible for the tab
// corresponding to |id|.
bool AlreadyShowingInfoBarForTab(const PermissionRequestID& id) const;
// Shows the next pending infobar for the tab corresponding to |id|, if any.
// Note that this may not be the pending request whose ID is |id| if other
// requests are higher in the queue. If we can't show infobars because there
// is no InfoBarService for this tab, removes all queued requests for this
// tab.
void ShowQueuedInfoBarForTab(const PermissionRequestID& id);
void ClearPendingInfobarRequestsForTab(const PermissionRequestID& id);
void RegisterForInfoBarNotifications(InfoBarService* infobar_service);
void UnregisterForInfoBarNotifications(InfoBarService* infobar_service);
content::NotificationRegistrar registrar_;
Profile* const profile_;
ContentSettingsType type_;
PendingInfobarRequests pending_infobar_requests_;
bool in_shutdown_;
DISALLOW_COPY_AND_ASSIGN(PermissionQueueController);
};
#endif // CHROME_BROWSER_CONTENT_SETTINGS_PERMISSION_QUEUE_CONTROLLER_H_
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