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// Copyright (c) 2012 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/system_monitor/removable_device_notifications_mac.h"
#include "content/public/browser/browser_thread.h"
namespace chrome {
namespace {
static RemovableDeviceNotificationsMac*
g_removable_device_notifications_mac = NULL;
void GetDiskInfoAndUpdateOnFileThread(
const scoped_refptr<RemovableDeviceNotificationsMac>& notifications,
base::mac::ScopedCFTypeRef<CFDictionaryRef> dict,
RemovableDeviceNotificationsMac::UpdateType update_type) {
DiskInfoMac info = DiskInfoMac::BuildDiskInfoOnFileThread(dict);
if (info.device_id().empty())
return;
content::BrowserThread::PostTask(
content::BrowserThread::UI,
FROM_HERE,
base::Bind(&RemovableDeviceNotificationsMac::UpdateDisk,
notifications,
info,
update_type));
}
void GetDiskInfoAndUpdate(
const scoped_refptr<RemovableDeviceNotificationsMac>& notifications,
DADiskRef disk,
RemovableDeviceNotificationsMac::UpdateType update_type) {
base::mac::ScopedCFTypeRef<CFDictionaryRef> dict(DADiskCopyDescription(disk));
content::BrowserThread::PostTask(
content::BrowserThread::FILE,
FROM_HERE,
base::Bind(GetDiskInfoAndUpdateOnFileThread,
notifications,
dict,
update_type));
}
} // namespace
RemovableDeviceNotificationsMac::RemovableDeviceNotificationsMac() {
session_.reset(DASessionCreate(NULL));
DCHECK(!g_removable_device_notifications_mac);
g_removable_device_notifications_mac = this;
DASessionScheduleWithRunLoop(
session_, CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
// Register for callbacks for attached, changed, and removed devices.
// This will send notifications for existing devices too.
DARegisterDiskAppearedCallback(
session_,
kDADiskDescriptionMatchVolumeMountable,
DiskAppearedCallback,
this);
DARegisterDiskDisappearedCallback(
session_,
kDADiskDescriptionMatchVolumeMountable,
DiskDisappearedCallback,
this);
DARegisterDiskDescriptionChangedCallback(
session_,
kDADiskDescriptionMatchVolumeMountable,
kDADiskDescriptionWatchVolumePath,
DiskDescriptionChangedCallback,
this);
}
RemovableDeviceNotificationsMac::~RemovableDeviceNotificationsMac() {
DCHECK_EQ(this, g_removable_device_notifications_mac);
g_removable_device_notifications_mac = NULL;
DASessionUnscheduleFromRunLoop(
session_, CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
}
// static
RemovableDeviceNotificationsMac*
RemovableDeviceNotificationsMac::GetInstance() {
DCHECK(g_removable_device_notifications_mac != NULL);
return g_removable_device_notifications_mac;
}
void RemovableDeviceNotificationsMac::UpdateDisk(
const DiskInfoMac& info,
UpdateType update_type) {
if (info.bsd_name().empty())
return;
std::map<std::string, DiskInfoMac>::iterator it =
disk_info_map_.find(info.bsd_name());
if (it != disk_info_map_.end()) {
// If an attached notification was previously posted then post a detached
// notification now. This is used for devices that are being removed or
// devices that have changed.
if (ShouldPostNotificationForDisk(it->second)) {
base::SystemMonitor::Get()->ProcessRemovableStorageDetached(
it->second.device_id());
}
}
if (update_type == UPDATE_DEVICE_REMOVED) {
if (it != disk_info_map_.end())
disk_info_map_.erase(it);
} else {
disk_info_map_[info.bsd_name()] = info;
MediaStorageUtil::RecordDeviceInfoHistogram(true, info.device_id(),
info.display_name());
if (ShouldPostNotificationForDisk(info)) {
base::SystemMonitor::Get()->ProcessRemovableStorageAttached(
info.device_id(), info.display_name(), info.mount_point().value());
}
}
}
bool RemovableDeviceNotificationsMac::GetDeviceInfoForPath(
const FilePath& path,
base::SystemMonitor::RemovableStorageInfo* device_info) const {
if (!path.IsAbsolute())
return false;
FilePath current = path;
const FilePath root(FilePath::kSeparators);
while (current != root) {
DiskInfoMac info;
if (FindDiskWithMountPoint(current, &info)) {
device_info->device_id = info.device_id();
device_info->name = info.display_name();
device_info->location = info.mount_point().value();
return true;
}
current = current.DirName();
}
return false;
}
// static
void RemovableDeviceNotificationsMac::DiskAppearedCallback(
DADiskRef disk,
void* context) {
RemovableDeviceNotificationsMac* notifications =
static_cast<RemovableDeviceNotificationsMac*>(context);
GetDiskInfoAndUpdate(notifications,
disk,
UPDATE_DEVICE_ADDED);
}
// static
void RemovableDeviceNotificationsMac::DiskDisappearedCallback(
DADiskRef disk,
void* context) {
RemovableDeviceNotificationsMac* notifications =
static_cast<RemovableDeviceNotificationsMac*>(context);
GetDiskInfoAndUpdate(notifications,
disk,
UPDATE_DEVICE_REMOVED);
}
// static
void RemovableDeviceNotificationsMac::DiskDescriptionChangedCallback(
DADiskRef disk,
CFArrayRef keys,
void *context) {
RemovableDeviceNotificationsMac* notifications =
static_cast<RemovableDeviceNotificationsMac*>(context);
GetDiskInfoAndUpdate(notifications,
disk,
UPDATE_DEVICE_CHANGED);
}
bool RemovableDeviceNotificationsMac::ShouldPostNotificationForDisk(
const DiskInfoMac& info) const {
// Only post notifications about disks that have no empty fields and
// are removable.
return !info.bsd_name().empty() &&
!info.device_id().empty() &&
!info.display_name().empty() &&
!info.mount_point().empty() &&
(info.type() == MediaStorageUtil::REMOVABLE_MASS_STORAGE_WITH_DCIM ||
info.type() == MediaStorageUtil::REMOVABLE_MASS_STORAGE_NO_DCIM);
}
bool RemovableDeviceNotificationsMac::FindDiskWithMountPoint(
const FilePath& mount_point,
DiskInfoMac* info) const {
for (std::map<std::string, DiskInfoMac>::const_iterator
it = disk_info_map_.begin(); it != disk_info_map_.end(); ++it) {
if (it->second.mount_point() == mount_point) {
*info = it->second;
return true;
}
}
return false;
}
} // namespace chrome
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