$animation = new ConsoleAnimation($output, $frames);
do {
$animation->render();
} while ($output->isDecorated());
public function render($placeholder = '.')
{
// Ensure that at least $this->interval microseconds have passed since
// the last frame.
if ($this->lastFrameTime !== null) {
$timeSince = (microtime(true) - $this->lastFrameTime) * 1000000;
if ($timeSince < $this->interval) {
usleep($this->interval - $timeSince);
}
}
if ($this->lastFrame !== null) {
// If overwriting is not possible, just output the placeholder.
if (!$this->output->isDecorated()) {
$this->output->write($placeholder);
$this->lastFrameTime = microtime(true);
return;
}
// Move the cursor up to overwrite the previous frame.
$lastFrameHeight = substr_count($this->frames[$this->lastFrame], "\n") + 1;
$this->output->write(sprintf("[%dA", $lastFrameHeight));
}
// Display the current frame.
$this->output->writeln($this->frames[$this->currentFrame]);
// Set up the next frame.
$this->lastFrame = $this->currentFrame;
$this->lastFrameTime = microtime(true);
$this->currentFrame++;
if (!isset($this->frames[$this->currentFrame])) {
$this->currentFrame = 0;
}
}