Adding support to retrieve remaining and total space on disk/file shelf.

chrome/browser/chromeos/cros/mount_library.h

 // Copyright (c) 2011 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_CHROMEOS_CROS_MOUNT_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_MOUNT_LIBRARY_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 37 matching lines @@
                                void* object) = 0;
   virtual void CallRequestMountInfo(RequestMountInfoCallback callback,
                                     void* object) = 0;
   virtual void CallFormatDevice(const char* device_path,
                                 const char* filesystem,
                                 FormatRequestCallback callback,
                                 void* object) = 0;
   virtual void CallGetDiskProperties(const char* device_path,
                                      GetDiskPropertiesCallback callback,
                                      void* object) = 0;
+  virtual void CallGetSizeStats(const char* mount_path,
+                                GetSizeStatsCallback callback,
+                                void* object) = 0;
   virtual MountEventConnection MonitorCrosDisks(MountEventMonitor monitor,
       MountCompletedMonitor mount_complete_monitor,
       void* object) = 0;
   virtual void DisconnectCrosDisksMonitorIfSet(MountEventConnection connection)
       = 0;
 };
 
 // This class handles the interaction with the ChromeOS mount library APIs.
 // Classes can add themselves as observers. Users can get an instance of this
 // library class like this: chromeos::CrosLibrary::Get()->GetMountLibrary()
@@ skipping 95 matching lines @@
     // Async API events.
     virtual void DiskChanged(MountLibraryEventType event,
                              const Disk* disk) = 0;
     virtual void DeviceChanged(MountLibraryEventType event,
                                const std::string& device_path) = 0;
     virtual void MountCompleted(MountEvent event_type,
                                 MountError error_code,
                                 const MountPointInfo& mount_info) = 0;
   };
 
+  class CallbackDelegate {
+   public:
+    virtual ~CallbackDelegate() {}
+    virtual void GetSizeStatsCallback(const char* mount_path,
+                                      bool success,
+                                      size_t total_size_kb,
+                                      size_t remaining_size_kb) = 0;
+  };
+
   virtual ~MountLibrary() {}
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
   virtual const DiskMap& disks() const = 0;
   virtual const MountPointMap& mount_points() const = 0;
 
   virtual void RequestMountInfoRefresh() = 0;
   virtual void MountPath(const char* source_path,
                          MountType type,
                          const MountPathOptions& options) = 0;
   // |path| is device's mount path.
   virtual void UnmountPath(const char* path) = 0;
 
+  // Retrieves total and remaining available size on |mount_path|.
+  virtual void GetSizeStats(const char* mount_path,
+                            CallbackDelegate* callback_delegate) = 0;
+
   // Formats device given its file path.
   // Example: file_path: /dev/sdb1
   virtual void FormatUnmountedDevice(const char* file_path) = 0;
 
   // Formats Device given its mount path. Unmount's the device
   // Example: mount_path: /media/VOLUME_LABEL
   virtual void FormatMountedDevice(const char* mount_path) = 0;
 
   // Unmounts device_poath and all of its known children.
   virtual void UnmountDeviceRecursive(const char* device_path,
       UnmountDeviceRecursiveCallbackType callback, void* user_data) = 0;
 
   // Helper functions for parameter conversions.
   static std::string MountTypeToString(MountType type);
   static MountType MountTypeFromString(const std::string& type_str);
   static std::string MountConditionToString(MountCondition type);
 
   // Used in testing. Enables mocking libcros.
   virtual void SetLibcrosProxy(MountLibcrosProxy* proxy) {}
 
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via CrosLibrary::Get().
   static MountLibrary* GetImpl(bool stub);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_MOUNT_LIBRARY_H_