WebUsb Android chooser UI

chrome/browser/ui/android/usb_chooser_android.h

+// 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_ANDROID_H_
+#define CHROME_BROWSER_UI_ANDROID_USB_CHOOSER_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"
+#include "mojo/public/cpp/bindings/array.h"
+
+namespace content {
+class RenderFrameHost;
+class WebContents;
+}
+
+namespace device {
+class UsbDevice;
+class UsbDeviceFilter;
+}
+
+// Represents a way to ask the user to select a USB device from a list of
+// options.
+class UsbChooserAndroid : public device::UsbService::Observer {

[newt (away), 2016/03/15 19:03:54]

For consistency with the java side of this class, it'd make sense to name this
"UsbChooserDialog" or "UsbChooserDialogAndroid".

[juncai, 2016/03/16 00:40:36]

Done.

+ public:
+  UsbChooserAndroid(
+      mojo::Array<device::usb::DeviceFilterPtr> device_filters,
+      content::RenderFrameHost* render_frame_host,
+      const device::usb::ChooserService::GetPermissionCallback& callback);
+  ~UsbChooserAndroid() override;
+
+  // device::UsbService::Observer:
+  void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override;
+  void OnDeviceRemoved(scoped_refptr<device::UsbDevice> device) override;
+
+  // 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();
+
+  // Report the dialog's result.
+  void OnDialogFinished(JNIEnv* env,
+                        const base::android::JavaParamRef<jobject>& obj,
+                        jint event_type,
+                        const base::android::JavaParamRef<jstring>& device_id);
+
+  void ShowUsbOverviewLink(JNIEnv* env,
+                           const base::android::JavaParamRef<jobject>& obj);
+
+  static bool Register(JNIEnv* env);
+
+ private:
+  void GotUsbDeviceList(
+      const std::vector<scoped_refptr<device::UsbDevice>>& devices);
+
+  void AddDeviceToChooserDialog(scoped_refptr<device::UsbDevice> device) const;
+  void RemoveDeviceFromChooserDialog(
+      scoped_refptr<device::UsbDevice> device) const;
+
+  void OpenUrl(const std::string& url);
+
+  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<UsbChooserAndroid> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(UsbChooserAndroid);
+};
+
+#endif  // CHROME_BROWSER_UI_ANDROID_USB_CHOOSER_ANDROID_H_