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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 CONTENT_PUBLIC_BROWSER_BLUETOOTH_CHOOSER_H_
#define CONTENT_PUBLIC_BROWSER_BLUETOOTH_CHOOSER_H_
#include <string>
#include "base/callback.h"
#include "base/strings/string16.h"
#include "content/common/content_export.h"
namespace content {
// Represents a way to ask the user to select a Bluetooth device from a list of
// options.
class CONTENT_EXPORT BluetoothChooser {
public:
enum class Event {
// Chromium can't ask for permission to scan for Bluetooth devices.
DENIED_PERMISSION,
// The user cancelled the chooser instead of selecting a device.
CANCELLED,
// The user selected device |opt_device_id|.
SELECTED,
// The user asked for a new Bluetooth discovery session to start.
RESCAN,
// Show overview page for Bluetooth.
SHOW_OVERVIEW_HELP,
// Show help page explaining why scanning failed because Bluetooth is off.
SHOW_ADAPTER_OFF_HELP,
// Show help page explaining why Chromium needs the Location permission to
// scan for Bluetooth devices. Only used on Android.
SHOW_NEED_LOCATION_HELP,
// As the dialog implementations grow more user-visible buttons and knobs,
// we'll add enumerators here to support them.
};
// Chooser implementations are constructed with an |EventHandler| and report
// user interaction with the chooser through it. |opt_device_id| is an empty
// string except for Event::SELECTED.
//
// The EventHandler won't be called after the chooser object is destroyed.
//
// After the EventHandler is called with Event::CANCELLED, Event::SELECTED,
// Event::DENIED_PERMISSION or Event::SHOW_*, it won't be called again, and
// users must not call any more BluetoothChooser methods.
typedef base::RepeatingCallback<void(Event, const std::string& opt_device_id)>
EventHandler;
BluetoothChooser() {}
virtual ~BluetoothChooser();
// Some platforms (especially Android) require Chromium to have permission
// from the user before it can scan for Bluetooth devices. This function
// returns false if Chromium isn't even allowed to ask. It defaults to true.
virtual bool CanAskForScanningPermission();
// Lets the chooser tell the user the state of the Bluetooth adapter. This
// defaults to POWERED_ON.
enum class AdapterPresence { ABSENT, POWERED_OFF, POWERED_ON };
virtual void SetAdapterPresence(AdapterPresence presence) {}
// Lets the chooser tell the user whether discovery is happening. This
// defaults to DISCOVERING.
enum class DiscoveryState { FAILED_TO_START, DISCOVERING, IDLE };
virtual void ShowDiscoveryState(DiscoveryState state) {}
// Adds a new device to the chooser or updates the information of an existing
// device.
//
// Sometimes when a Bluetooth device stops advertising, the |device_name| can
// be invalid, and in that case |should_update_name| will be set false.
//
// The range of |signal_strength_level| is -1 to 4 inclusively.
// -1 means that the device doesn't have RSSI which happens when the device
// is already connected.
virtual void AddOrUpdateDevice(const std::string& device_id,
bool should_update_name,
const base::string16& device_name,
bool is_gatt_connected,
bool is_paired,
int signal_strength_level) {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_BLUETOOTH_CHOOSER_H_
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