/**
* Convert the given node to color node
*
* @param Node $node The node
* @param null $exceptionMessage ILess\Exception\Exception message if the node could not be converted to color node
* @return ColorNode
* @throws InvalidArgumentException If the node could not be converted to color
*/
protected function getColorNode(Node $node, $exceptionMessage = null)
{
if ($node instanceof ColorNode) {
return $node;
}
// this is a keyword
if ($node instanceof KeywordNode && Color::isNamedColor($node->value)) {
$node = new ColorNode(Color::color($node->value));
} elseif ($node instanceof ToColorConvertibleInterface) {
$node = $node->toColor();
}
if (!$node instanceof ColorNode) {
throw new InvalidArgumentException($exceptionMessage ? $exceptionMessage : 'Cannot convert node to color');
}
return $node;
}
/**
* Creates new color from the keyword
*
* @param string $keyword
* @return Color
*/
public static function fromKeyword($keyword)
{
$color = null;
// is this named color?
if (self::isNamedColor($keyword)) {
$color = new Color(substr(Color::color($keyword), 1));
$color->keyword = $keyword;
} elseif ($keyword === 'transparent') {
$color = new Color([255, 255, 255], 0);
$color->isTransparentKeyword = true;
}
return $color;
}
