/**
* {@inheritdoc}
*/
public static function preRenderElement(Element $element)
{
// Injects the icon into the title (the only way this is possible).
if ($icon =& $element->getProperty('icon')) {
$title = $element->getProperty('title');
// Handle #icon_only.
if ($element->getProperty('icon_only')) {
if ($attribute_title = $element->getAttribute('title', '')) {
$title .= ' - ' . $attribute_title;
}
$element->setAttribute('title', $title)->addClass('icon-only')->setProperty('title', $icon);
if (Bootstrap::getTheme()->getSetting('tooltip_enabled')) {
$element->setAttribute('data-toggle', 'tooltip');
}
return;
}
// Handle #icon_position.
$position = $element->getProperty('icon_position', 'before');
// Render #icon and trim it (so it doesn't add underlines in whitespace).
$rendered_icon = trim(Element::create($icon)->render());
// Default position is before.
$markup = "{$rendered_icon}@title";
if ($position === 'after') {
$markup = "@title{$rendered_icon}";
}
// Replace the title and set an icon position class.
$element->setProperty('title', new FormattableMarkup($markup, ['@title' => $title]))->addClass("icon-{$position}");
}
}
