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Remove unnecessary ProgressBar stdout writes (fixes flickering) #30278

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merged 1 commit into from Feb 17, 2019
Merged

Remove unnecessary ProgressBar stdout writes (fixes flickering) #30278

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13 changes: 5 additions & 8 deletions src/Symfony/Component/Console/Helper/ProgressBar.php
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Expand Up @@ -466,19 +466,16 @@ private function overwrite($message)
{
if ($this->overwrite) {
if (!$this->firstRun) {
// 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));
$message = str_repeat("\x1B[1A\x1B[2K", $this->formatLineCount).$message;
}

// Move the cursor to the beginning of the line and erase the line
$message = "\x0D\x1B[2K$message";
}
} elseif ($this->step > 0) {
$this->output->writeln('');
$message = PHP_EOL.$message;
}

$this->firstRun = false;
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