Struct stdweb::web::FileReader
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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.
Methods
impl FileReader
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pub fn new() -> FileReader
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Returns a newly constructed FileReader
.
pub fn read_as_text<T: IBlob>(&self, blob: &T) -> Result<(), TODO>
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Starts reading the contents of the specified blob. Once finished
the result
attribute will contain the contents of the file as a text string.
pub fn read_as_array_buffer<T: IBlob>(&self, blob: &T) -> Result<(), TODO>
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Starts reading the contents of the specified blob. Once finished
the result
attribute will contain the contents of the file as an TypedArray.
pub fn abort(&self)
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Aborts the read operation. Upon return, the ready_state
will be Done
.
pub fn ready_state(&self) -> FileReaderReadyState
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Returns the current state of the reader.
pub fn result(&self) -> Option<FileReaderResult>
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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.
Trait Implementations
impl Clone for FileReader
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fn clone(&self) -> FileReader
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Debug for FileReader
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fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl PartialEq for FileReader
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fn eq(&self, __arg_0: &FileReader) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &FileReader) -> bool
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This method tests for !=
.
impl Eq for FileReader
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impl From<FileReader> for EventTarget
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fn from(value: FileReader) -> Self
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Performs the conversion.
impl TryFrom<EventTarget> for FileReader
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type Error = ConversionError
The type returned in the event of a conversion error.
fn try_from(value: EventTarget) -> Result<Self, Self::Error>
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Performs the conversion.
impl InstanceOf for FileReader
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fn instance_of(reference: &Reference) -> bool
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Checks whenever a given Reference if of type Self
.
impl AsRef<Reference> for FileReader
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impl ReferenceType for FileReader
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unsafe fn from_reference_unchecked(reference: Reference) -> Self
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Converts a given reference into a concrete reference-like wrapper. Doesn't do any type checking; highly unsafe to use! Read more
impl From<FileReader> for Reference
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fn from(value: FileReader) -> Self
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Performs the conversion.
impl TryFrom<FileReader> for Reference
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type Error = Void
The type returned in the event of a conversion error.
fn try_from(value: FileReader) -> Result<Self, Self::Error>
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Performs the conversion.
impl TryFrom<Reference> for FileReader
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type Error = ConversionError
The type returned in the event of a conversion error.
fn try_from(reference: Reference) -> Result<Self, Self::Error>
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Performs the conversion.
impl<'_r> TryFrom<&'_r Reference> for FileReader
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type Error = ConversionError
The type returned in the event of a conversion error.
fn try_from(reference: &Reference) -> Result<Self, Self::Error>
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Performs the conversion.
impl TryFrom<Value> for FileReader
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type Error = ConversionError
The type returned in the event of a conversion error.
fn try_from(value: Value) -> Result<Self, Self::Error>
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Performs the conversion.
impl<'_r> TryFrom<&'_r Value> for FileReader
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type Error = ConversionError
The type returned in the event of a conversion error.
fn try_from(value: &Value) -> Result<Self, Self::Error>
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Performs the conversion.
impl JsSerialize for FileReader
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impl IEventTarget for FileReader
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fn add_event_listener<T, F>(&self, listener: F) -> EventListenerHandle where
T: ConcreteEvent,
F: FnMut(T) + 'static,
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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. Read more
fn dispatch_event<T: IEvent>(&self, event: &T) -> Result<bool, TODO>
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Dispatches an Event
at this EventTarget
, invoking the affected event listeners in the appropriate order. Read more