Add icon on file and folder to display upload status into mountpoint on Resana Secure

[Max-7]

No description provided.

[Max-7]

Results of investigation (see https://github.com/Max-7/icon_handler)

• Build a DLL that implements the IShellIconOverlayIdentifier interface
  • GetOverlayInfo returns the icon
  • GetPriority returns a priority between 0 and 100
  • IsMemberOf returns S_OK if the icon should be displayed on the file, S_FALSE otherwise (if IsMemberOf only returns S_OK, then ALL files will have the icon)
• Add a registry key in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers\ with the CLSID of the dll as a value
• regsvr32 /n /i:user <dll_file>
• Reboot

One DLL can only add one icon, so multiple DLLs will be necessary.

Left to do:

• convert the current implementation in C++ to Rust
• update the CI to build the DLLs
• update the installer to create/remove the registry keys
• define how the DLLs will communicate with Parsec to get the file status

[Max-7]

The DLLs will be build in C++ and packaged with the application (See Scille/parsec-cloud#3764).

Communication with Parsec will be done using virtual files on the mountpoint. By opening and reading the path of the file + ".parsec_entry_info", one will get information on a file (or a folder), in particular if the file or folder is synced. (See Scille/parsec-cloud#3765)