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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console\Output;

use Symfony\Component\Console\Formatter\OutputFormatterInterface;

/**
 * OutputInterface is the interface implemented by all Output classes.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
interface OutputInterface
{
    const VERBOSITY_QUIET = 16;
    const VERBOSITY_NORMAL = 32;
    const VERBOSITY_VERBOSE = 64;
    const VERBOSITY_VERY_VERBOSE = 128;
    const VERBOSITY_DEBUG = 256;

const OUTPUT_NORMAL = 1;
    const OUTPUT_RAW = 2;
    const OUTPUT_PLAIN = 4;

/**
     * Writes a message to the output.
     *
     * @param string|array $messages The message as an array of strings or a single string
     * @param bool         $newline  Whether to add a newline
     * @param int          $options  A bitmask of options (one of the OUTPUT or VERBOSITY constants), 0 is considered the same as self::OUTPUT_NORMAL | self::VERBOSITY_NORMAL
     */
    public function write($messages, $newline = false, $options = 0);

/**
     * Writes a message to the output and adds a newline at the end.
     *
     * @param string|array $messages The message as an array of strings or a single string
     * @param int          $options  A bitmask of options (one of the OUTPUT or VERBOSITY constants), 0 is considered the same as self::OUTPUT_NORMAL | self::VERBOSITY_NORMAL
     */
    public function writeln($messages, $options = 0);

/**
     * Sets the verbosity of the output.
     *
     * @param int $level The level of verbosity (one of the VERBOSITY constants)
     */
    public function setVerbosity($level);

/**
     * Gets the current verbosity of the output.
     *
     * @return int The current level of verbosity (one of the VERBOSITY constants)
     */
    public function getVerbosity();

/**
     * Returns whether verbosity is quiet (-q).
     *
     * @return bool true if verbosity is set to VERBOSITY_QUIET, false otherwise
     */
    public function isQuiet();

/**
     * Returns whether verbosity is verbose (-v).
     *
     * @return bool true if verbosity is set to VERBOSITY_VERBOSE, false otherwise
     */
    public function isVerbose();

/**
     * Returns whether verbosity is very verbose (-vv).
     *
     * @return bool true if verbosity is set to VERBOSITY_VERY_VERBOSE, false otherwise
     */
    public function isVeryVerbose();

/**
     * Returns whether verbosity is debug (-vvv).
     *
     * @return bool true if verbosity is set to VERBOSITY_DEBUG, false otherwise
     */
    public function isDebug();

/**
     * Sets the decorated flag.
     *
     * @param bool $decorated Whether to decorate the messages
     */
    public function setDecorated($decorated);

/**
     * Gets the decorated flag.
     *
     * @return bool true if the output will decorate messages, false otherwise
     */
    public function isDecorated();

public function setFormatter(OutputFormatterInterface $formatter);

/**
     * Returns current output formatter instance.
     *
     * @return OutputFormatterInterface
     */
    public function getFormatter();
}