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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.
#include "chrome/browser/usb/usb_chooser_bubble_delegate.h"
#include <stddef.h>
#include <utility>
#include "base/bind.h"
#include "base/metrics/histogram_macros.h"
#include "base/stl_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/usb/usb_chooser_context.h"
#include "chrome/browser/usb/usb_chooser_context_factory.h"
#include "chrome/common/url_constants.h"
#include "components/bubble/bubble_controller.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "device/core/device_client.h"
#include "device/usb/mojo/type_converters.h"
#include "device/usb/usb_device.h"
#include "device/usb/usb_device_filter.h"
#include "url/gurl.h"
namespace {
// Reasons the chooser may be closed. These are used in histograms so do not
// remove/reorder entries. Only add at the end just before
// WEBUSB_CHOOSER_CLOSED_MAX. Also remember to update the enum listing in
// tools/metrics/histograms/histograms.xml.
enum WebUsbChooserClosed {
// The user cancelled the permission prompt without selecting a device.
WEBUSB_CHOOSER_CLOSED_CANCELLED = 0,
// The user probably cancelled the permission prompt without selecting a
// device because there were no devices to select.
WEBUSB_CHOOSER_CLOSED_CANCELLED_NO_DEVICES,
// The user granted permission to access a device.
WEBUSB_CHOOSER_CLOSED_PERMISSION_GRANTED,
// The user granted permission to access a device but that permission will be
// revoked when the device is disconnected.
WEBUSB_CHOOSER_CLOSED_EPHEMERAL_PERMISSION_GRANTED,
// Maximum value for the enum.
WEBUSB_CHOOSER_CLOSED_MAX
};
void RecordChooserClosure(WebUsbChooserClosed disposition) {
UMA_HISTOGRAM_ENUMERATION("WebUsb.ChooserClosed", disposition,
WEBUSB_CHOOSER_CLOSED_MAX);
}
// Check if the origin is allowed.
bool FindInAllowedOrigins(const device::WebUsbAllowedOrigins* allowed_origins,
const GURL& origin) {
if (!allowed_origins)
return false;
if (ContainsValue(allowed_origins->origins, origin))
return true;
for (const auto& config : allowed_origins->configurations) {
if (ContainsValue(config.origins, origin))
return true;
for (const auto& function : config.functions) {
if (ContainsValue(function.origins, origin))
return true;
}
}
return false;
}
} // namespace
UsbChooserBubbleDelegate::UsbChooserBubbleDelegate(
content::RenderFrameHost* owner,
mojo::Array<device::usb::DeviceFilterPtr> device_filters,
content::RenderFrameHost* render_frame_host,
const webusb::WebUsbPermissionBubble::GetPermissionCallback& callback)
: ChooserBubbleDelegate(owner),
render_frame_host_(render_frame_host),
callback_(callback),
usb_service_observer_(this),
weak_factory_(this) {
device::UsbService* usb_service =
device::DeviceClient::Get()->GetUsbService();
if (!usb_service)
return;
if (!usb_service_observer_.IsObserving(usb_service))
usb_service_observer_.Add(usb_service);
if (!device_filters.is_null())
filters_ = device_filters.To<std::vector<device::UsbDeviceFilter>>();
usb_service->GetDevices(base::Bind(
&UsbChooserBubbleDelegate::GotUsbDeviceList, weak_factory_.GetWeakPtr()));
}
UsbChooserBubbleDelegate::~UsbChooserBubbleDelegate() {
if (!callback_.is_null())
callback_.Run(nullptr);
}
size_t UsbChooserBubbleDelegate::NumOptions() const {
return devices_.size();
}
const base::string16& UsbChooserBubbleDelegate::GetOption(size_t index) const {
DCHECK_LT(index, devices_.size());
return devices_[index].second;
}
void UsbChooserBubbleDelegate::Select(size_t index) {
DCHECK_LT(index, devices_.size());
content::WebContents* web_contents =
content::WebContents::FromRenderFrameHost(render_frame_host_);
GURL embedding_origin =
web_contents->GetMainFrame()->GetLastCommittedURL().GetOrigin();
Profile* profile =
Profile::FromBrowserContext(web_contents->GetBrowserContext());
UsbChooserContext* chooser_context =
UsbChooserContextFactory::GetForProfile(profile);
chooser_context->GrantDevicePermission(
render_frame_host_->GetLastCommittedURL().GetOrigin(), embedding_origin,
devices_[index].first->guid());
device::usb::DeviceInfoPtr device_info_ptr =
device::usb::DeviceInfo::From(*devices_[index].first);
callback_.Run(std::move(device_info_ptr));
callback_.reset(); // Reset |callback_| so that it is only run once.
RecordChooserClosure(devices_[index].first->serial_number().empty()
? WEBUSB_CHOOSER_CLOSED_EPHEMERAL_PERMISSION_GRANTED
: WEBUSB_CHOOSER_CLOSED_PERMISSION_GRANTED);
if (bubble_controller_)
bubble_controller_->CloseBubble(BUBBLE_CLOSE_ACCEPTED);
}
void UsbChooserBubbleDelegate::Cancel() {
RecordChooserClosure(devices_.size() == 0
? WEBUSB_CHOOSER_CLOSED_CANCELLED_NO_DEVICES
: WEBUSB_CHOOSER_CLOSED_CANCELLED);
if (bubble_controller_)
bubble_controller_->CloseBubble(BUBBLE_CLOSE_CANCELED);
}
void UsbChooserBubbleDelegate::Close() {}
void UsbChooserBubbleDelegate::OnDeviceAdded(
scoped_refptr<device::UsbDevice> device) {
if (device::UsbDeviceFilter::MatchesAny(device, filters_) &&
FindInAllowedOrigins(
device->webusb_allowed_origins(),
render_frame_host_->GetLastCommittedURL().GetOrigin())) {
devices_.push_back(std::make_pair(device, device->product_string()));
if (observer())
observer()->OnOptionAdded(devices_.size() - 1);
}
}
GURL UsbChooserBubbleDelegate::GetHelpCenterUrl() const {
return GURL(chrome::kChooserUsbOverviewURL);
}
void UsbChooserBubbleDelegate::OnDeviceRemoved(
scoped_refptr<device::UsbDevice> device) {
for (auto it = devices_.begin(); it != devices_.end(); ++it) {
if (it->first == device) {
size_t index = it - devices_.begin();
devices_.erase(it);
if (observer())
observer()->OnOptionRemoved(index);
return;
}
}
}
// Get a list of devices that can be shown in the chooser bubble UI for
// user to grant permsssion.
void UsbChooserBubbleDelegate::GotUsbDeviceList(
const std::vector<scoped_refptr<device::UsbDevice>>& devices) {
for (const auto& device : devices) {
if (device::UsbDeviceFilter::MatchesAny(device, filters_) &&
FindInAllowedOrigins(
device->webusb_allowed_origins(),
render_frame_host_->GetLastCommittedURL().GetOrigin())) {
devices_.push_back(std::make_pair(device, device->product_string()));
}
}
if (observer())
observer()->OnOptionsInitialized();
}
void UsbChooserBubbleDelegate::set_bubble_controller(
BubbleReference bubble_controller) {
bubble_controller_ = bubble_controller;
}
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