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// Copyright (c) 2012 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_MEDIA_MEDIA_STREAM_CAPTURE_INDICATOR_H_
#define CHROME_BROWSER_MEDIA_MEDIA_STREAM_CAPTURE_INDICATOR_H_
#include <vector>
#include "base/callback_forward.h"
#include "base/containers/scoped_ptr_hash_map.h"
#include "base/memory/ref_counted.h"
#include "chrome/browser/status_icons/status_icon_menu_model.h"
#include "content/public/common/media_stream_request.h"
namespace content {
class WebContents;
} // namespace content
namespace gfx {
class ImageSkia;
} // namespace gfx
class StatusIcon;
// This indicator is owned by MediaCaptureDevicesDispatcher
// (MediaCaptureDevicesDispatcher is a singleton).
class MediaStreamCaptureIndicator
: public base::RefCountedThreadSafe<MediaStreamCaptureIndicator>,
public StatusIconMenuModel::Delegate {
public:
MediaStreamCaptureIndicator();
// Registers a new media stream for |web_contents| and returns UI object
// that's used by the content layer to notify about state of the stream.
scoped_ptr<content::MediaStreamUI> RegisterMediaStream(
content::WebContents* web_contents,
const content::MediaStreamDevices& devices);
// Overrides from StatusIconMenuModel::Delegate implementation.
void ExecuteCommand(int command_id, int event_flags) override;
// Returns true if the |web_contents| is capturing user media (e.g., webcam or
// microphone input).
bool IsCapturingUserMedia(content::WebContents* web_contents) const;
// Returns true if the |web_contents| is capturing video (e.g., webcam).
bool IsCapturingVideo(content::WebContents* web_contents) const;
// Returns true if the |web_contents| is capturing audio (e.g., microphone).
bool IsCapturingAudio(content::WebContents* web_contents) const;
// Returns true if the |web_contents| itself is being mirrored (e.g., a source
// of media for remote broadcast).
bool IsBeingMirrored(content::WebContents* web_contents) const;
private:
class UIDelegate;
class WebContentsDeviceUsage;
friend class WebContentsDeviceUsage;
friend class base::RefCountedThreadSafe<MediaStreamCaptureIndicator>;
~MediaStreamCaptureIndicator() override;
// Following functions/variables are executed/accessed only on UI thread.
// Called by WebContentsDeviceUsage when it's about to destroy itself, i.e.
// when WebContents is being destroyed.
void UnregisterWebContents(content::WebContents* web_contents);
// Updates the status tray menu. Called by WebContentsDeviceUsage.
void UpdateNotificationUserInterface();
// Helpers to create and destroy status tray icon. Called from
// UpdateNotificationUserInterface().
void EnsureStatusTrayIconResources();
void MaybeCreateStatusTrayIcon(bool audio, bool video);
void MaybeDestroyStatusTrayIcon();
// Gets the status icon image and the string to use as the tooltip.
void GetStatusTrayIconInfo(bool audio,
bool video,
gfx::ImageSkia* image,
base::string16* tool_tip);
// Reference to our status icon - owned by the StatusTray. If null,
// the platform doesn't support status icons.
StatusIcon* status_icon_;
// These images are owned by ResourceBundle and need not be destroyed.
gfx::ImageSkia* mic_image_;
gfx::ImageSkia* camera_image_;
// A map that contains the usage counts of the opened capture devices for each
// WebContents instance.
base::ScopedPtrHashMap<content::WebContents*,
scoped_ptr<WebContentsDeviceUsage>> usage_map_;
// A vector which maps command IDs to their associated WebContents
// instance. This is rebuilt each time the status tray icon context menu is
// updated.
typedef std::vector<content::WebContents*> CommandTargets;
CommandTargets command_targets_;
DISALLOW_COPY_AND_ASSIGN(MediaStreamCaptureIndicator);
};
#endif // CHROME_BROWSER_MEDIA_MEDIA_STREAM_CAPTURE_INDICATOR_H_
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