Source/WebCore/fileapi/FileReader.idl

/*
 * Copyright (C) 2010 Google Inc.  All rights reserved.
 * Copyright (C) 2011 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

[
    Exposed=(Window,Worker),
    ActiveDOMObject,
    Constructor,
    ConstructorCallWith=ScriptExecutionContext,
] interface FileReader : EventTarget {
    // ready states
    const unsigned short EMPTY = 0;
    const unsigned short LOADING = 1;
    const unsigned short DONE = 2;
    readonly attribute unsigned short readyState;

    // FIXME: In all four methods found below, the blob parameter should not be nullable.
    // async read methods
    [MayThrowException] void readAsArrayBuffer(Blob? blob);
    [MayThrowException] void readAsBinaryString(Blob? blob);
    [MayThrowException] void readAsText(Blob? blob, optional DOMString encoding);
    [MayThrowException] void readAsDataURL(Blob? blob);

    void abort();

    readonly attribute (DOMString or ArrayBuffer)? result;

    readonly attribute FileError error;

    attribute EventHandler onloadstart;
    attribute EventHandler onprogress;
    attribute EventHandler onload;
    attribute EventHandler onabort;
    attribute EventHandler onerror;
    attribute EventHandler onloadend;
};