ProgressBar.php in Zircon Profile 8

Namespace

Symfony\Component\Console\Helper

File

vendor/symfony/console/Helper/ProgressBar.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[e-mail]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Console\Helper;

use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * The ProgressBar provides helpers to display progress output.
 *
 * @author Fabien Potencier <[e-mail]>
 * @author Chris Jones <[e-mail]>
 */
class ProgressBar {

  // options
  private $barWidth = 28;
  private $barChar;
  private $emptyBarChar = '-';
  private $progressChar = '>';
  private $format;
  private $internalFormat;
  private $redrawFreq = 1;

  /**
   * @var OutputInterface
   */
  private $output;
  private $step = 0;
  private $max;
  private $startTime;
  private $stepWidth;
  private $percent = 0.0;
  private $lastMessagesLength = 0;
  private $formatLineCount;
  private $messages;
  private $overwrite = true;
  private static $formatters;
  private static $formats;

  /**
   * Constructor.
   *
   * @param OutputInterface $output An OutputInterface instance
   * @param int             $max    Maximum steps (0 if unknown)
   */
  public function __construct(OutputInterface $output, $max = 0) {
    if ($output instanceof ConsoleOutputInterface) {
      $output = $output
        ->getErrorOutput();
    }
    $this->output = $output;
    $this
      ->setMaxSteps($max);
    if (!$this->output
      ->isDecorated()) {

      // disable overwrite when output does not support ANSI codes.
      $this->overwrite = false;
      if ($this->max > 10) {

        // set a reasonable redraw frequency so output isn't flooded
        $this
          ->setRedrawFrequency($max / 10);
      }
    }
    $this->startTime = time();
  }

  /**
   * Sets a placeholder formatter for a given name.
   *
   * This method also allow you to override an existing placeholder.
   *
   * @param string   $name     The placeholder name (including the delimiter char like %)
   * @param callable $callable A PHP callable
   */
  public static function setPlaceholderFormatterDefinition($name, $callable) {
    if (!self::$formatters) {
      self::$formatters = self::initPlaceholderFormatters();
    }
    self::$formatters[$name] = $callable;
  }

  /**
   * Gets the placeholder formatter for a given name.
   *
   * @param string $name The placeholder name (including the delimiter char like %)
   *
   * @return callable|null A PHP callable
   */
  public static function getPlaceholderFormatterDefinition($name) {
    if (!self::$formatters) {
      self::$formatters = self::initPlaceholderFormatters();
    }
    return isset(self::$formatters[$name]) ? self::$formatters[$name] : null;
  }

  /**
   * Sets a format for a given name.
   *
   * This method also allow you to override an existing format.
   *
   * @param string $name   The format name
   * @param string $format A format string
   */
  public static function setFormatDefinition($name, $format) {
    if (!self::$formats) {
      self::$formats = self::initFormats();
    }
    self::$formats[$name] = $format;
  }

  /**
   * Gets the format for a given name.
   *
   * @param string $name The format name
   *
   * @return string|null A format string
   */
  public static function getFormatDefinition($name) {
    if (!self::$formats) {
      self::$formats = self::initFormats();
    }
    return isset(self::$formats[$name]) ? self::$formats[$name] : null;
  }
  public function setMessage($message, $name = 'message') {
    $this->messages[$name] = $message;
  }
  public function getMessage($name = 'message') {
    return $this->messages[$name];
  }

  /**
   * Gets the progress bar start time.
   *
   * @return int The progress bar start time
   */
  public function getStartTime() {
    return $this->startTime;
  }

  /**
   * Gets the progress bar maximal steps.
   *
   * @return int The progress bar max steps
   */
  public function getMaxSteps() {
    return $this->max;
  }

  /**
   * Gets the progress bar step.
   *
   * @deprecated since version 2.6, to be removed in 3.0. Use {@link getProgress()} instead.
   *
   * @return int The progress bar step
   */
  public function getStep() {
    @trigger_error('The ' . __METHOD__ . ' method is deprecated since version 2.6 and will be removed in 3.0. Use the getProgress() method instead.', E_USER_DEPRECATED);
    return $this
      ->getProgress();
  }

  /**
   * Gets the current step position.
   *
   * @return int The progress bar step
   */
  public function getProgress() {
    return $this->step;
  }

  /**
   * Gets the progress bar step width.
   *
   * @internal This method is public for PHP 5.3 compatibility, it should not be used.
   *
   * @return int The progress bar step width
   */
  public function getStepWidth() {
    return $this->stepWidth;
  }

  /**
   * Gets the current progress bar percent.
   *
   * @return float The current progress bar percent
   */
  public function getProgressPercent() {
    return $this->percent;
  }

  /**
   * Sets the progress bar width.
   *
   * @param int $size The progress bar size
   */
  public function setBarWidth($size) {
    $this->barWidth = (int) $size;
  }

  /**
   * Gets the progress bar width.
   *
   * @return int The progress bar size
   */
  public function getBarWidth() {
    return $this->barWidth;
  }

  /**
   * Sets the bar character.
   *
   * @param string $char A character
   */
  public function setBarCharacter($char) {
    $this->barChar = $char;
  }

  /**
   * Gets the bar character.
   *
   * @return string A character
   */
  public function getBarCharacter() {
    if (null === $this->barChar) {
      return $this->max ? '=' : $this->emptyBarChar;
    }
    return $this->barChar;
  }

  /**
   * Sets the empty bar character.
   *
   * @param string $char A character
   */
  public function setEmptyBarCharacter($char) {
    $this->emptyBarChar = $char;
  }

  /**
   * Gets the empty bar character.
   *
   * @return string A character
   */
  public function getEmptyBarCharacter() {
    return $this->emptyBarChar;
  }

  /**
   * Sets the progress bar character.
   *
   * @param string $char A character
   */
  public function setProgressCharacter($char) {
    $this->progressChar = $char;
  }

  /**
   * Gets the progress bar character.
   *
   * @return string A character
   */
  public function getProgressCharacter() {
    return $this->progressChar;
  }

  /**
   * Sets the progress bar format.
   *
   * @param string $format The format
   */
  public function setFormat($format) {
    $this->format = null;
    $this->internalFormat = $format;
  }

  /**
   * Sets the redraw frequency.
   *
   * @param int $freq The frequency in steps
   */
  public function setRedrawFrequency($freq) {
    $this->redrawFreq = (int) $freq;
  }

  /**
   * Starts the progress output.
   *
   * @param int|null $max Number of steps to complete the bar (0 if indeterminate), null to leave unchanged
   */
  public function start($max = null) {
    $this->startTime = time();
    $this->step = 0;
    $this->percent = 0.0;
    if (null !== $max) {
      $this
        ->setMaxSteps($max);
    }
    $this
      ->display();
  }

  /**
   * Advances the progress output X steps.
   *
   * @param int $step Number of steps to advance
   *
   * @throws \LogicException
   */
  public function advance($step = 1) {
    $this
      ->setProgress($this->step + $step);
  }

  /**
   * Sets the current progress.
   *
   * @deprecated since version 2.6, to be removed in 3.0. Use {@link setProgress()} instead.
   *
   * @param int $step The current progress
   *
   * @throws \LogicException
   */
  public function setCurrent($step) {
    @trigger_error('The ' . __METHOD__ . ' method is deprecated since version 2.6 and will be removed in 3.0. Use the setProgress() method instead.', E_USER_DEPRECATED);
    $this
      ->setProgress($step);
  }

  /**
   * Sets whether to overwrite the progressbar, false for new line.
   *
   * @param bool $overwrite
   */
  public function setOverwrite($overwrite) {
    $this->overwrite = (bool) $overwrite;
  }

  /**
   * Sets the current progress.
   *
   * @param int $step The current progress
   *
   * @throws \LogicException
   */
  public function setProgress($step) {
    $step = (int) $step;
    if ($step < $this->step) {
      throw new \LogicException('You can\'t regress the progress bar.');
    }
    if ($this->max && $step > $this->max) {
      $this->max = $step;
    }
    $prevPeriod = (int) ($this->step / $this->redrawFreq);
    $currPeriod = (int) ($step / $this->redrawFreq);
    $this->step = $step;
    $this->percent = $this->max ? (double) $this->step / $this->max : 0;
    if ($prevPeriod !== $currPeriod || $this->max === $step) {
      $this
        ->display();
    }
  }

  /**
   * Finishes the progress output.
   */
  public function finish() {
    if (!$this->max) {
      $this->max = $this->step;
    }
    if ($this->step === $this->max && !$this->overwrite) {

      // prevent double 100% output
      return;
    }
    $this
      ->setProgress($this->max);
  }

  /**
   * Outputs the current progress string.
   */
  public function display() {
    if (OutputInterface::VERBOSITY_QUIET === $this->output
      ->getVerbosity()) {
      return;
    }
    if (null === $this->format) {
      $this
        ->setRealFormat($this->internalFormat ?: $this
        ->determineBestFormat());
    }

    // these 3 variables can be removed in favor of using $this in the closure when support for PHP 5.3 will be dropped.
    $self = $this;
    $output = $this->output;
    $messages = $this->messages;
    $this
      ->overwrite(preg_replace_callback("{%([a-z\\-_]+)(?:\\:([^%]+))?%}i", function ($matches) use ($self, $output, $messages) {
      if ($formatter = $self::getPlaceholderFormatterDefinition($matches[1])) {
        $text = call_user_func($formatter, $self, $output);
      }
      elseif (isset($messages[$matches[1]])) {
        $text = $messages[$matches[1]];
      }
      else {
        return $matches[0];
      }
      if (isset($matches[2])) {
        $text = sprintf('%' . $matches[2], $text);
      }
      return $text;
    }, $this->format));
  }

  /**
   * Removes the progress bar from the current line.
   *
   * This is useful if you wish to write some output
   * while a progress bar is running.
   * Call display() to show the progress bar again.
   */
  public function clear() {
    if (!$this->overwrite) {
      return;
    }
    if (null === $this->format) {
      $this
        ->setRealFormat($this->internalFormat ?: $this
        ->determineBestFormat());
    }
    $this
      ->overwrite(str_repeat("\n", $this->formatLineCount));
  }

  /**
   * Sets the progress bar format.
   *
   * @param string $format The format
   */
  private function setRealFormat($format) {

    // try to use the _nomax variant if available
    if (!$this->max && null !== self::getFormatDefinition($format . '_nomax')) {
      $this->format = self::getFormatDefinition($format . '_nomax');
    }
    elseif (null !== self::getFormatDefinition($format)) {
      $this->format = self::getFormatDefinition($format);
    }
    else {
      $this->format = $format;
    }
    $this->formatLineCount = substr_count($this->format, "\n");
  }

  /**
   * Sets the progress bar maximal steps.
   *
   * @param int $max The progress bar max steps
   */
  private function setMaxSteps($max) {
    $this->max = max(0, (int) $max);
    $this->stepWidth = $this->max ? Helper::strlen($this->max) : 4;
  }

  /**
   * Overwrites a previous message to the output.
   *
   * @param string $message The message
   */
  private function overwrite($message) {
    $lines = explode("\n", $message);

    // append whitespace to match the line's length
    if (null !== $this->lastMessagesLength) {
      foreach ($lines as $i => $line) {
        if ($this->lastMessagesLength > Helper::strlenWithoutDecoration($this->output
          ->getFormatter(), $line)) {
          $lines[$i] = str_pad($line, $this->lastMessagesLength, " ", STR_PAD_RIGHT);
        }
      }
    }
    if ($this->overwrite) {

      // move back to the beginning of the progress bar before redrawing it
      $this->output
        ->write("\r");
    }
    elseif ($this->step > 0) {

      // move to new line
      $this->output
        ->writeln('');
    }
    if ($this->formatLineCount) {
      $this->output
        ->write(sprintf("\33[%dA", $this->formatLineCount));
    }
    $this->output
      ->write(implode("\n", $lines));
    $this->lastMessagesLength = 0;
    foreach ($lines as $line) {
      $len = Helper::strlenWithoutDecoration($this->output
        ->getFormatter(), $line);
      if ($len > $this->lastMessagesLength) {
        $this->lastMessagesLength = $len;
      }
    }
  }
  private function determineBestFormat() {
    switch ($this->output
      ->getVerbosity()) {

      // OutputInterface::VERBOSITY_QUIET: display is disabled anyway
      case OutputInterface::VERBOSITY_VERBOSE:
        return $this->max ? 'verbose' : 'verbose_nomax';
      case OutputInterface::VERBOSITY_VERY_VERBOSE:
        return $this->max ? 'very_verbose' : 'very_verbose_nomax';
      case OutputInterface::VERBOSITY_DEBUG:
        return $this->max ? 'debug' : 'debug_nomax';
      default:
        return $this->max ? 'normal' : 'normal_nomax';
    }
  }
  private static function initPlaceholderFormatters() {
    return array(
      'bar' => function (ProgressBar $bar, OutputInterface $output) {
        $completeBars = floor($bar
          ->getMaxSteps() > 0 ? $bar
          ->getProgressPercent() * $bar
          ->getBarWidth() : $bar
          ->getProgress() % $bar
          ->getBarWidth());
        $display = str_repeat($bar
          ->getBarCharacter(), $completeBars);
        if ($completeBars < $bar
          ->getBarWidth()) {
          $emptyBars = $bar
            ->getBarWidth() - $completeBars - Helper::strlenWithoutDecoration($output
            ->getFormatter(), $bar
            ->getProgressCharacter());
          $display .= $bar
            ->getProgressCharacter() . str_repeat($bar
            ->getEmptyBarCharacter(), $emptyBars);
        }
        return $display;
      },
      'elapsed' => function (ProgressBar $bar) {
        return Helper::formatTime(time() - $bar
          ->getStartTime());
      },
      'remaining' => function (ProgressBar $bar) {
        if (!$bar
          ->getMaxSteps()) {
          throw new \LogicException('Unable to display the remaining time if the maximum number of steps is not set.');
        }
        if (!$bar
          ->getProgress()) {
          $remaining = 0;
        }
        else {
          $remaining = round((time() - $bar
            ->getStartTime()) / $bar
            ->getProgress() * ($bar
            ->getMaxSteps() - $bar
            ->getProgress()));
        }
        return Helper::formatTime($remaining);
      },
      'estimated' => function (ProgressBar $bar) {
        if (!$bar
          ->getMaxSteps()) {
          throw new \LogicException('Unable to display the estimated time if the maximum number of steps is not set.');
        }
        if (!$bar
          ->getProgress()) {
          $estimated = 0;
        }
        else {
          $estimated = round((time() - $bar
            ->getStartTime()) / $bar
            ->getProgress() * $bar
            ->getMaxSteps());
        }
        return Helper::formatTime($estimated);
      },
      'memory' => function (ProgressBar $bar) {
        return Helper::formatMemory(memory_get_usage(true));
      },
      'current' => function (ProgressBar $bar) {
        return str_pad($bar
          ->getProgress(), $bar
          ->getStepWidth(), ' ', STR_PAD_LEFT);
      },
      'max' => function (ProgressBar $bar) {
        return $bar
          ->getMaxSteps();
      },
      'percent' => function (ProgressBar $bar) {
        return floor($bar
          ->getProgressPercent() * 100);
      },
    );
  }
  private static function initFormats() {
    return array(
      'normal' => ' %current%/%max% [%bar%] %percent:3s%%',
      'normal_nomax' => ' %current% [%bar%]',
      'verbose' => ' %current%/%max% [%bar%] %percent:3s%% %elapsed:6s%',
      'verbose_nomax' => ' %current% [%bar%] %elapsed:6s%',
      'very_verbose' => ' %current%/%max% [%bar%] %percent:3s%% %elapsed:6s%/%estimated:-6s%',
      'very_verbose_nomax' => ' %current% [%bar%] %elapsed:6s%',
      'debug' => ' %current%/%max% [%bar%] %percent:3s%% %elapsed:6s%/%estimated:-6s% %memory:6s%',
      'debug_nomax' => ' %current% [%bar%] %elapsed:6s% %memory:6s%',
    );
  }

}

Classes

Name	Description
ProgressBar	The ProgressBar provides helpers to display progress output.