FileReader

class FileReader extends EventTarget

Annotations: @Native.new("FileReader")

Inheritance

Object → EventTarget → FileReader

Constructors

FileReader() factory

factory FileReader()

Implementation

factory FileReader() {
  return FileReader._create_1();
}

Properties

error no setter

DomException? get error

Implementation

DomException? get error native;

hashCode no setter inherited

int get hashCode

Inherited from Interceptor.

Implementation

int get hashCode => Primitives.objectHashCode(this);

on no setter inherited

Events get on

This is an ease-of-use accessor for event streams which should only be used when an explicit accessor is not available.

Inherited from EventTarget.

Implementation

Events get on => new Events(this);

onAbort no setter

Stream<ProgressEvent> get onAbort

Stream of abort events handled by this FileReader.

Implementation

Stream<ProgressEvent> get onAbort => abortEvent.forTarget(this);

onError no setter

Stream<ProgressEvent> get onError

Stream of error events handled by this FileReader.

Implementation

Stream<ProgressEvent> get onError => errorEvent.forTarget(this);

onLoad no setter

Stream<ProgressEvent> get onLoad

Stream of load events handled by this FileReader.

Implementation

Stream<ProgressEvent> get onLoad => loadEvent.forTarget(this);

onLoadEnd no setter

Stream<ProgressEvent> get onLoadEnd

Stream of loadend events handled by this FileReader.

Implementation

Stream<ProgressEvent> get onLoadEnd => loadEndEvent.forTarget(this);

onLoadStart no setter

Stream<ProgressEvent> get onLoadStart

Stream of loadstart events handled by this FileReader.

Implementation

Stream<ProgressEvent> get onLoadStart => loadStartEvent.forTarget(this);

onProgress no setter

Stream<ProgressEvent> get onProgress

Stream of progress events handled by this FileReader.

Implementation

Stream<ProgressEvent> get onProgress => progressEvent.forTarget(this);

readyState no setter

int get readyState

Implementation

int get readyState native;

result no setter

Object? get result

Implementation

Object? get result {
  var res = JS('Null|String|NativeByteBuffer', '#.result', this);
  if (res is ByteBuffer) {
    return new Uint8List.view(res);
  }
  return res;
}

runtimeType no setter inherited

Type get runtimeType

Inherited from Interceptor.

Implementation

Type get runtimeType =>
    getRuntimeTypeOfInterceptorNotArray(getInterceptor(this), this);

Methods

abort()

void abort()

Implementation

void abort() native;

addEventListener() inherited

void addEventListener(
  String type,
  (dynamic Function(Event event))? listener, [
  bool? useCapture,
])

Inherited from EventTarget.

Implementation

void addEventListener(
  String type,
  EventListener? listener, [
  bool? useCapture,
]) {
  // TODO(leafp): This check is avoid a bug in our dispatch code when
  // listener is null.  The browser treats this call as a no-op in this
  // case, so it's fine to short-circuit it, but we should not have to.
  if (listener != null) {
    _addEventListener(type, listener, useCapture);
  }
}

dispatchEvent() inherited

bool dispatchEvent(Event event)

Inherited from EventTarget.

Implementation

bool dispatchEvent(Event event) native;

noSuchMethod() inherited

dynamic noSuchMethod(Invocation invocation)

Invoked when a nonexistent method or property is accessed.

A dynamic member invocation can attempt to call a member which doesn't exist on the receiving object. Example:

dynamic object = 1;
object.add(42); // Statically allowed, run-time error

This invalid code will invoke the noSuchMethod method of the integer 1 with an Invocation representing the .add(42) call and arguments (which then throws).

Classes can override noSuchMethod to provide custom behavior for such invalid dynamic invocations.

A class with a non-default noSuchMethod invocation can also omit implementations for members of its interface. Example:

class MockList<T> implements List<T> {
  noSuchMethod(Invocation invocation) {
    log(invocation);
    super.noSuchMethod(invocation); // Will throw.
  }
}
void main() {
  MockList().add(42);
}

This code has no compile-time warnings or errors even though the MockList class has no concrete implementation of any of the List interface methods. Calls to List methods are forwarded to noSuchMethod, so this code will log an invocation similar to Invocation.method(#add, [42]) and then throw.

If a value is returned from noSuchMethod, it becomes the result of the original invocation. If the value is not of a type that can be returned by the original invocation, a type error occurs at the invocation.

The default behavior is to throw a NoSuchMethodError.

Inherited from Interceptor.

Implementation

dynamic noSuchMethod(Invocation invocation) {
  throw NoSuchMethodError.withInvocation(this, invocation);
}

readAsArrayBuffer()

void readAsArrayBuffer(Blob blob)

Implementation

void readAsArrayBuffer(Blob blob) native;

readAsDataUrl()

void readAsDataUrl(Blob blob)

Implementation

@JSName('readAsDataURL')
void readAsDataUrl(Blob blob) native;

readAsText()

void readAsText(Blob blob, [String? label])

Implementation

void readAsText(Blob blob, [String? label]) native;

removeEventListener() inherited

void removeEventListener(
  String type,
  (dynamic Function(Event event))? listener, [
  bool? useCapture,
])

Inherited from EventTarget.

Implementation

void removeEventListener(
  String type,
  EventListener? listener, [
  bool? useCapture,
]) {
  // TODO(leafp): This check is avoid a bug in our dispatch code when
  // listener is null.  The browser treats this call as a no-op in this
  // case, so it's fine to short-circuit it, but we should not have to.
  if (listener != null) {
    _removeEventListener(type, listener, useCapture);
  }
}

toString() inherited

String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Inherited from Interceptor.

Implementation

String toString() => Primitives.objectToHumanReadableString(this);

Operators

operator ==() inherited

bool operator ==(Object other)

The equality operator.

The default behavior for all Objects is to return true if and only if this object and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

• Total: It must return a boolean for all arguments. It should never throw.

• Reflexive: For all objects o, o == o must be true.

• Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.

• Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator, it should override the hashCode method as well to maintain consistency.

Inherited from Interceptor.

Implementation

bool operator ==(Object other) => identical(this, other);

Constants

abortEvent

const EventStreamProvider<ProgressEvent> abortEvent

Static factory designed to expose abort events to event handlers that are not necessarily instances of FileReader.

See EventStreamProvider for usage information.

Implementation

static const EventStreamProvider<ProgressEvent> abortEvent =
    const EventStreamProvider<ProgressEvent>('abort');

DONE

const int DONE

Implementation

static const int DONE = 2;

EMPTY

const int EMPTY

Implementation

static const int EMPTY = 0;

errorEvent

const EventStreamProvider<ProgressEvent> errorEvent

Static factory designed to expose error events to event handlers that are not necessarily instances of FileReader.

See EventStreamProvider for usage information.

Implementation

static const EventStreamProvider<ProgressEvent> errorEvent =
    const EventStreamProvider<ProgressEvent>('error');

loadEndEvent

const EventStreamProvider<ProgressEvent> loadEndEvent

Static factory designed to expose loadend events to event handlers that are not necessarily instances of FileReader.

See EventStreamProvider for usage information.

Implementation

static const EventStreamProvider<ProgressEvent> loadEndEvent =
    const EventStreamProvider<ProgressEvent>('loadend');

loadEvent

const EventStreamProvider<ProgressEvent> loadEvent

Static factory designed to expose load events to event handlers that are not necessarily instances of FileReader.

See EventStreamProvider for usage information.

Implementation

static const EventStreamProvider<ProgressEvent> loadEvent =
    const EventStreamProvider<ProgressEvent>('load');

LOADING

const int LOADING

Implementation

static const int LOADING = 1;

loadStartEvent

const EventStreamProvider<ProgressEvent> loadStartEvent

Static factory designed to expose loadstart events to event handlers that are not necessarily instances of FileReader.

See EventStreamProvider for usage information.

Implementation

static const EventStreamProvider<ProgressEvent> loadStartEvent =
    const EventStreamProvider<ProgressEvent>('loadstart');

progressEvent

const EventStreamProvider<ProgressEvent> progressEvent

Static factory designed to expose progress events to event handlers that are not necessarily instances of FileReader.

See EventStreamProvider for usage information.

Implementation

static const EventStreamProvider<ProgressEvent> progressEvent =
    const EventStreamProvider<ProgressEvent>('progress');