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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\Helper;
use Symfony\Component\Console\Exception\LogicException;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Output\ConsoleSectionOutput;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Terminal;
/**
* The ProgressBar provides helpers to display progress output.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Chris Jones <leeked@gmail.com>
*/
final class ProgressBar
{
private $barWidth = 28;
private $barChar;
private $emptyBarChar = '-';
private $progressChar = '>';
private $format;
private $internalFormat;
private $redrawFreq = 1;
private $output;
private $step = 0;
private $max;
private $startTime;
private $stepWidth;
private $percent = 0.0;
private $formatLineCount;
private $messages = array();
private $overwrite = true;
private $terminal;
private $firstRun = true;
private static $formatters;
private static $formats;
/**
* @param OutputInterface $output An OutputInterface instance
* @param int $max Maximum steps (0 if unknown)
*/
public function __construct(OutputInterface $output, int $max = 0)
{
if ($output instanceof ConsoleOutputInterface) {
$output = $output->getErrorOutput();
}
$this->output = $output;
$this->setMaxSteps($max);
$this->terminal = new Terminal();
if (!$this->output->isDecorated()) {
// disable overwrite when output does not support ANSI codes.
$this->overwrite = false;
// 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(string $name, callable $callable): void
{
if (!self::$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(string $name): ?callable
{
if (!self::$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(string $name, string $format): void
{
if (!self::$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(string $name): ?string
{
if (!self::$formats) {
self::$formats = self::initFormats();
}
return isset(self::$formats[$name]) ? self::$formats[$name] : null;
}
/**
* Associates a text with a named placeholder.
*
* The text is displayed when the progress bar is rendered but only
* when the corresponding placeholder is part of the custom format line
* (by wrapping the name with %).
*
* @param string $message The text to associate with the placeholder
* @param string $name The name of the placeholder
*/
public function setMessage(string $message, string $name = 'message')
{
$this->messages[$name] = $message;
}
public function getMessage(string $name = 'message')
{
return $this->messages[$name];
}
public function getStartTime(): int
{
return $this->startTime;
}
public function getMaxSteps(): int
{
return $this->max;
}
public function getProgress(): int
{
return $this->step;
}
private function getStepWidth(): int
{
return $this->stepWidth;
}
public function getProgressPercent(): float
{
return $this->percent;
}
public function setBarWidth(int $size)
{
$this->barWidth = max(1, $size);
}
public function getBarWidth(): int
{
return $this->barWidth;
}
public function setBarCharacter(string $char)
{
$this->barChar = $char;
}
public function getBarCharacter(): string
{
if (null === $this->barChar) {
return $this->max ? '=' : $this->emptyBarChar;
}
return $this->barChar;
}
public function setEmptyBarCharacter(string $char)
{
$this->emptyBarChar = $char;
}
public function getEmptyBarCharacter(): string
{
return $this->emptyBarChar;
}
public function setProgressCharacter(string $char)
{
$this->progressChar = $char;
}
public function getProgressCharacter(): string
{
return $this->progressChar;
}
public function setFormat(string $format)
{
$this->format = null;
$this->internalFormat = $format;
}
/**
* Sets the redraw frequency.
*
* @param int|float $freq The frequency in steps
*/
public function setRedrawFrequency(int $freq)
{
$this->redrawFreq = max($freq, 1);
}
/**
* 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(int $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
*/
public function advance(int $step = 1)
{
$this->setProgress($this->step + $step);
}
/**
* Sets whether to overwrite the progressbar, false for new line.
*/
public function setOverwrite(bool $overwrite)
{
$this->overwrite = $overwrite;
}
public function setProgress(int $step)
{
if ($this->max && $step > $this->max) {
$this->max = $step;
} elseif ($step < 0) {
$step = 0;
}
$prevPeriod = (int) ($this->step / $this->redrawFreq);
$currPeriod = (int) ($step / $this->redrawFreq);
$this->step = $step;
$this->percent = $this->max ? (float) $this->step / $this->max : 0;
if ($prevPeriod !== $currPeriod || $this->max === $step) {
$this->display();
}
}
public function setMaxSteps(int $max)
{
$this->format = null;
$this->max = max(0, $max);
$this->stepWidth = $this->max ? Helper::strlen((string) $this->max) : 4;
}
/**
* Finishes the progress output.
*/
public function finish(): void
{
if (!$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(): void
{
if (OutputInterface::VERBOSITY_QUIET === $this->output->getVerbosity()) {
return;
}
if (null === $this->format) {
$this->setRealFormat($this->internalFormat ?: $this->determineBestFormat());
}
$this->overwrite($this->buildLine());
}
/**
* 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(): void
{
if (!$this->overwrite) {
return;
}
if (null === $this->format) {
$this->setRealFormat($this->internalFormat ?: $this->determineBestFormat());
}
$this->overwrite('');
}
private function setRealFormat(string $format)
{
// try to use the _nomax variant if available
if (!$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");
}
/**
* Overwrites a previous message to the output.
*/
private function overwrite(string $message): void
{
if ($this->overwrite) {
if (!$this->firstRun) {
if ($this->output instanceof ConsoleSectionOutput) {
$lines = floor(Helper::strlen($message) / $this->terminal->getWidth()) + $this->formatLineCount + 1;
$this->output->clear($lines);
} else {
// Move the cursor to the beginning of the line
$this->output->write("\x0D");
// Erase the line
$this->output->write("\x1B[2K");
// Erase previous lines
if ($this->formatLineCount > 0) {
$this->output->write(str_repeat("\x1B[1A\x1B[2K", $this->formatLineCount));
}
}
}
} elseif ($this->step > 0) {
$this->output->writeln('');
}
$this->firstRun = false;
$this->output->write($message);
}
private function determineBestFormat(): string
{
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(): array
{
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(): array
{
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%',
);
}
private function buildLine(): string
{
$regex = "{%([a-z\-_]+)(?:\:([^%]+))?%}i";
$callback = function ($matches) {
if ($formatter = $this::getPlaceholderFormatterDefinition($matches[1])) {
$text = \call_user_func($formatter, $this, $this->output);
} elseif (isset($this->messages[$matches[1]])) {
$text = $this->messages[$matches[1]];
} else {
return $matches[0];
}
if (isset($matches[2])) {
$text = sprintf('%'.$matches[2], $text);
}
return $text;
};
$line = preg_replace_callback($regex, $callback, $this->format);
// gets string length for each sub line with multiline format
$linesLength = array_map(function ($subLine) {
return Helper::strlenWithoutDecoration($this->output->getFormatter(), rtrim($subLine, "\r"));
}, explode("\n", $line));
$linesWidth = max($linesLength);
$terminalWidth = $this->terminal->getWidth();
if ($linesWidth <= $terminalWidth) {
return $line;
}
$this->setBarWidth($this->barWidth - $linesWidth + $terminalWidth);
return preg_replace_callback($regex, $callback, $this->format);
}
}