Struct stdweb::web::FileReader

pub struct FileReader(_);

The FileReader object lets web applications asynchronously read the contents of files (or raw data buffers) stored on the user's computer, using File or Blob objects to specify the file or data to read.

(JavaScript docs)

Methods

impl FileReader

pub fn new() -> FileReader

Returns a newly constructed FileReader.

(JavaScript docs)

pub fn read_as_text<T: IBlob>(&self, blob: &T) -> Result<(), TODO>

Starts reading the contents of the specified blob. Once finished the result attribute will contain the contents of the file as a text string.

(JavaScript docs)

pub fn read_as_array_buffer<T: IBlob>(&self, blob: &T) -> Result<(), TODO>

Starts reading the contents of the specified blob. Once finished the result attribute will contain the contents of the file as an TypedArray.

(JavaScript docs)

pub fn abort(&self)

Aborts the read operation. Upon return, the ready_state will be Done.

(JavaScript docs)

pub fn ready_state(&self) -> FileReaderReadyState

Returns the current state of the reader.

(JavaScript docs)

pub fn result(&self) -> Option<FileReaderResult>

The file's contents. This method will only return a value after the read operation is complete, and the format of the data depends on which of the methods was used to initiate the read operation.

(JavaScript docs)

Trait Implementations

impl JsSerialize for FileReader

impl TryFrom<EventTarget> for FileReader

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: EventTarget) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<FileReader> for Reference

type Error = Void

The type returned in the event of a conversion error.

fn try_from(value: FileReader) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Reference> for FileReader

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(reference: Reference) -> Result<Self, Self::Error>

Performs the conversion.

impl<'_r> TryFrom<&'_r Reference> for FileReader

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(reference: &Reference) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Value> for FileReader

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl<'_r> TryFrom<&'_r Value> for FileReader

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: &Value) -> Result<Self, Self::Error>

Performs the conversion.

impl InstanceOf for FileReader

fn instance_of(reference: &Reference) -> bool

Checks whenever a given Reference if of type Self.

impl ReferenceType for FileReader

unsafe fn from_reference_unchecked(reference: Reference) -> Self

Converts a given reference into a concrete reference-like wrapper. Doesn't do any type checking; highly unsafe to use!

impl IEventTarget for FileReader

fn add_event_listener<T, F>(&self, listener: F) -> EventListenerHandle where     T: ConcreteEvent,     F: FnMut(T) + 'static,

Adds given event handler to the list of event listeners for the specified EventTarget on which it's called.

fn dispatch_event<T: IEvent>(&self, event: &T) -> Result<bool, TODO>

Dispatches an Event at this EventTarget, invoking the affected event listeners in the appropriate order.

impl PartialEq<FileReader> for FileReader

fn eq(&self, other: &FileReader) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &FileReader) -> bool

This method tests for !=.

impl Eq for FileReader

impl AsRef<Reference> for FileReader

fn as_ref(&self) -> &Reference

Performs the conversion.

impl Clone for FileReader

fn clone(&self) -> FileReader

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl From<FileReader> for EventTarget

fn from(value: FileReader) -> Self

Performs the conversion.

impl From<FileReader> for Reference

fn from(value: FileReader) -> Self

Performs the conversion.

impl Debug for FileReader

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.