/**
* Prepare the content for rendering.
*
* @param string|array $content A string, or an array of strings
*
* @return array
*/
private function prepareContent($content)
{
// If a string is passed, separate it by newline characters
if (is_string($content)) {
$content = explode("\n", $content);
}
// Loop through the lines, and set the box's width to that
// of the longest line
$this->width = 0;
foreach ($content as $line) {
$len = mb_strlen($this->graphite->strip($line), 'UTF-8');
if ($len > $this->width) {
$this->width = $len;
}
}
// Pad each line of the content to the box's width
foreach ($content as $i => $line) {
$len = mb_strlen($this->graphite->strip($line), 'UTF-8');
$content[$i] = $line . $this->graphite->repeat(' ', $this->width - $len);
}
// Store the array of lines
return $this->content = $content;
}