text: // Copyright 2016 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_ANDROID_USB_CHOOSER_DIALOG_ANDROID_H_
  #define CHROME_BROWSER_UI_ANDROID_USB_CHOOSER_DIALOG_ANDROID_H_
  
  #include <string>
  #include <vector>
  
  #include "base/android/scoped_java_ref.h"
  #include "base/macros.h"
  #include "base/memory/ref_counted.h"
  #include "base/memory/weak_ptr.h"
  #include "base/scoped_observer.h"
  #include "base/strings/string16.h"
  #include "device/usb/public/interfaces/chooser_service.mojom.h"
  #include "device/usb/usb_service.h"
  
  namespace content {
  class RenderFrameHost;
  }
  
  namespace device {
  class UsbDevice;
  struct UsbDeviceFilter;
  }
  
  // Represents a way to ask the user to select a USB device from a list of
  // options.
  class UsbChooserDialogAndroid : public device::UsbService::Observer {
   public:
    UsbChooserDialogAndroid(
        const std::vector<device::UsbDeviceFilter>& filters,
        content::RenderFrameHost* render_frame_host,
        const device::usb::ChooserService::GetPermissionCallback& callback);
    ~UsbChooserDialogAndroid() override;
  
    // device::UsbService::Observer:
    void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override;
    void OnDeviceRemoved(scoped_refptr<device::UsbDevice> device) override;
  
    // Report the dialog's result.
    void OnItemSelected(JNIEnv* env,
                        const base::android::JavaParamRef<jobject>& obj,
                        const base::android::JavaParamRef<jstring>& device_id);
    void OnDialogCancelled(JNIEnv* env,
                           const base::android::JavaParamRef<jobject>& obj);
  
    void LoadUsbHelpPage(JNIEnv* env,
                         const base::android::JavaParamRef<jobject>& obj);
  
    static bool Register(JNIEnv* env);
  
   private:
    void GotUsbDeviceList(
        const std::vector<scoped_refptr<device::UsbDevice>>& devices);
  
    // Called when the user selects the USB device with |guid| from the chooser
    // dialog.
    void Select(const std::string& guid);
    // Called when the chooser dialog is closed.
    void Cancel();
  
    void AddDeviceToChooserDialog(scoped_refptr<device::UsbDevice> device) const;
    void RemoveDeviceFromChooserDialog(
        scoped_refptr<device::UsbDevice> device) const;
  
    void OpenUrl(const std::string& url);
  
    bool DisplayDevice(scoped_refptr<device::UsbDevice> device) const;
  
    content::RenderFrameHost* const render_frame_host_;
    device::usb::ChooserService::GetPermissionCallback callback_;
    ScopedObserver<device::UsbService, device::UsbService::Observer>
        usb_service_observer_;
    std::vector<device::UsbDeviceFilter> filters_;
  
    std::vector<scoped_refptr<device::UsbDevice>> devices_;
  
    base::android::ScopedJavaGlobalRef<jobject> java_dialog_;
    base::WeakPtrFactory<UsbChooserDialogAndroid> weak_factory_;
  
    DISALLOW_COPY_AND_ASSIGN(UsbChooserDialogAndroid);
  };
  
  #endif  // CHROME_BROWSER_UI_ANDROID_USB_CHOOSER_DIALOG_ANDROID_H_
  