Trait FileHandle 

pub trait FileHandle {
    // Required methods
    fn name(&self) -> &str;
    fn url(&self) -> String;
    fn size(&self) -> FileSizeFuture;
    fn read_at<'a>(
        &'a self,
        offset: u64,
        buf: &'a mut [u8],
    ) -> FileReadFuture<'a>;
    fn open_write(&self) -> Option<FileOpenFuture<Box<dyn FileWriter>>>;
}

A picked file the system gives no path for, read and written at any offset.

Required Methods

fn name(&self) -> &str

The file’s name, which the user sees.

fn url(&self) -> String

The URL the system reads the file by (PickedFile::url).

fn size(&self) -> FileSizeFuture

fn read_at<'a>(&'a self, offset: u64, buf: &'a mut [u8]) -> FileReadFuture<'a>

Reads into buf from offset; answers how many bytes it read, 0 at the end.

fn open_write(&self) -> Option<FileOpenFuture<Box<dyn FileWriter>>>

Opens the file to write; None unless the pick is writable.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors