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// Copyright (c) 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_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTROLLER_BASE_H_
#define CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTROLLER_BASE_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "chrome/browser/ui/exclusive_access/exclusive_access_bubble_type.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class ExclusiveAccessManager;
class GURL;
namespace content {
class WebContents;
}
// The base class for the different exclusive access controllers like the
// FullscreenController, and MouseLockController which controls lifetime for
// which the resource (screen/mouse) is held exclusively.
class ExclusiveAccessControllerBase : public content::NotificationObserver {
public:
explicit ExclusiveAccessControllerBase(ExclusiveAccessManager* manager);
~ExclusiveAccessControllerBase() override;
GURL GetExclusiveAccessBubbleURL() const;
virtual GURL GetURLForExclusiveAccessBubble() const;
content::WebContents* exclusive_access_tab() const {
return tab_with_exclusive_access_;
}
// Functions implemented by derived classes:
// Control behavior when escape is pressed returning true if it was handled.
virtual bool HandleUserPressedEscape() = 0;
// Called by Browser in response to call from ExclusiveAccessBubble.
virtual void ExitExclusiveAccessToPreviousState() = 0;
// Called by ExclusiveAccessManager in response to calls from Browser.
virtual void OnTabDeactivated(content::WebContents* web_contents);
virtual void OnTabDetachedFromView(content::WebContents* web_contents);
virtual void OnTabClosing(content::WebContents* web_contents);
// Callbacks ////////////////////////////////////////////////////////////////
// content::NotificationObserver to detect page navigation and exit exclusive
// access.
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// For recording UMA.
void RecordBubbleReshownUMA();
// Called when the exclusive access session ends.
void RecordExitingUMA();
protected:
void SetTabWithExclusiveAccess(content::WebContents* tab);
ExclusiveAccessManager* exclusive_access_manager() const { return manager_; }
// Exits exclusive access mode for the tab if currently exclusive.
virtual void ExitExclusiveAccessIfNecessary() = 0;
// Notifies the tab that it has been forced out of exclusive access mode
// if necessary.
virtual void NotifyTabExclusiveAccessLost() = 0;
// Records the BubbleReshowsPerSession data to the appropriate histogram for
// this controller.
virtual void RecordBubbleReshowsHistogram(int bubble_reshow_count) = 0;
private:
void UpdateNotificationRegistrations();
ExclusiveAccessManager* const manager_;
content::NotificationRegistrar registrar_;
content::WebContents* tab_with_exclusive_access_ = nullptr;
// The number of bubble re-shows for the current session (reset upon exiting).
int bubble_reshow_count_ = 0;
DISALLOW_COPY_AND_ASSIGN(ExclusiveAccessControllerBase);
};
#endif // CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTROLLER_BASE_H_
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