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/* vim:set expandtab ts=4 sw=4 sts=4 cin: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

/**
 * An interface that allows writing unicode data.
 */
[scriptable, uuid(2d00b1bb-8b21-4a63-bcc6-7213f513ac2e)]
interface nsIUnicharOutputStream : nsISupports
{
    /**
     * Write a single character to the stream. When writing many characters,
     * prefer the string-taking write method.
     *
     * @retval true The character was written successfully
     * @retval false Not all bytes of the character could be written.
     */
    boolean write(in unsigned long aCount,
                  [const, array, size_is(aCount)] in char16_t c);

    /**
     * Write a string to the stream.
     *
     * @retval true The string was written successfully
     * @retval false Not all bytes of the string could be written.
     */
    boolean writeString(in AString str);

    /**
     * Flush the stream. This finishes the conversion and writes any bytes that
     * finish the current byte sequence.
     *
     * It does NOT flush the underlying stream.
     *
     * @see nsIUnicodeEncoder::Finish
     */
    void flush();

    /**
     * Close the stream and free associated resources. This also closes the
     * underlying stream.
     */
    void close();
};