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// Copyright 2014 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 EXTENSIONS_BROWSER_DEVICE_PERMISSIONS_PROMPT_H_
#define EXTENSIONS_BROWSER_DEVICE_PERMISSIONS_PROMPT_H_
#include <vector>
#include "base/callback.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/scoped_observer.h"
#include "base/strings/string16.h"
#include "content/public/browser/browser_thread.h"
#include "device/usb/usb_service.h"
namespace content {
class BrowserContext;
class WebContents;
}
namespace device {
class UsbDevice;
class UsbDeviceFilter;
}
namespace extensions {
class Extension;
// Platform-independent interface for displaing a UI for choosing devices
// (similar to choosing files).
class DevicePermissionsPrompt {
public:
// Context information available to the UI implementation.
class Prompt : public base::RefCountedThreadSafe<
Prompt,
content::BrowserThread::DeleteOnFileThread>,
public device::UsbService::Observer {
public:
// Displayed properties of a device.
struct DeviceInfo {
DeviceInfo(scoped_refptr<device::UsbDevice> device);
~DeviceInfo();
scoped_refptr<device::UsbDevice> device;
base::string16 name;
base::string16 original_manufacturer_string;
base::string16 original_product_string;
base::string16 serial_number;
};
// Since the set of devices can change while the UI is visible an
// implementation should register an observer.
class Observer {
public:
virtual void OnDevicesChanged() = 0;
};
Prompt();
// Only one observer may be registered at a time.
void SetObserver(Observer* observer);
base::string16 GetHeading() const;
base::string16 GetPromptMessage() const;
size_t GetDeviceCount() const { return devices_.size(); }
scoped_refptr<device::UsbDevice> GetDevice(size_t index) const;
base::string16 GetDeviceName(size_t index) const {
DCHECK_LT(index, devices_.size());
return devices_[index].name;
}
base::string16 GetDeviceSerialNumber(size_t index) const {
DCHECK_LT(index, devices_.size());
return devices_[index].serial_number;
}
// Notifies the DevicePermissionsManager for the current extension that
// access to the device at the given index is now granted.
void GrantDevicePermission(size_t index) const;
const extensions::Extension* extension() const { return extension_; }
void set_extension(const extensions::Extension* extension) {
extension_ = extension;
}
void set_browser_context(content::BrowserContext* context) {
browser_context_ = context;
}
bool multiple() const { return multiple_; }
void set_multiple(bool multiple) { multiple_ = multiple; }
const std::vector<device::UsbDeviceFilter>& filters() const {
return filters_;
}
void set_filters(const std::vector<device::UsbDeviceFilter>& filters);
private:
friend struct content::BrowserThread::DeleteOnThread<
content::BrowserThread::FILE>;
friend class base::DeleteHelper<Prompt>;
virtual ~Prompt();
// Querying for devices must be done asynchronously on the FILE thread.
void DoDeviceQuery();
void AppendCheckedUsbDevice(std::vector<DeviceInfo>* device_info,
scoped_refptr<device::UsbDevice> device,
const base::Closure& callback,
bool allowed);
void AddCheckedUsbDevice(scoped_refptr<device::UsbDevice> device,
bool allowed);
void DeviceQueryComplete(std::vector<DeviceInfo>* device_info);
void SetDevices(const std::vector<DeviceInfo>& devices);
void AddDevice(const DeviceInfo& device);
void RemoveDevice(scoped_refptr<device::UsbDevice> device);
// device::UsbService::Observer implementation:
void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override;
void OnDeviceRemoved(scoped_refptr<device::UsbDevice> device) override;
const extensions::Extension* extension_;
content::BrowserContext* browser_context_;
bool multiple_;
std::vector<device::UsbDeviceFilter> filters_;
std::vector<DeviceInfo> devices_;
Observer* observer_;
ScopedObserver<device::UsbService, device::UsbService::Observer>
usb_service_observer_;
};
class Delegate {
public:
// Called with the list of selected USB devices.
virtual void OnUsbDevicesChosen(
const std::vector<scoped_refptr<device::UsbDevice>>& devices) = 0;
protected:
virtual ~Delegate() {}
};
DevicePermissionsPrompt(content::WebContents* web_contents);
virtual ~DevicePermissionsPrompt();
void AskForUsbDevices(Delegate* delegate,
const Extension* extension,
content::BrowserContext* context,
bool multiple,
const std::vector<device::UsbDeviceFilter>& filters);
protected:
virtual void ShowDialog() = 0;
content::WebContents* web_contents() { return web_contents_; }
Delegate* delegate() { return delegate_; }
scoped_refptr<Prompt> prompt() { return prompt_; }
private:
// Parent web contents of the device permissions UI dialog.
content::WebContents* web_contents_;
// The delegate called after the UI has been dismissed.
Delegate* delegate_;
// Parameters available to the UI implementation.
scoped_refptr<Prompt> prompt_;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_DEVICE_PERMISSIONS_PROMPT_H_
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