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<?php
namespace ipl\Web;
use ArrayObject;
use Less_Parser;
/**
* @extends ArrayObject<string, string>
*/
class LessRuleset extends ArrayObject
{
/** @var ?string */
protected $selector;
/** @var array<LessRuleset> */
protected $children = [];
/**
* Create a new LessRuleset
*
* @param string $selector Selector to use
* @param array<string, string> $properties CSS properties
*
* @return self
*/
public static function create(string $selector, array $properties): self
{
$ruleset = new static();
$ruleset->selector = $selector;
$ruleset->exchangeArray($properties);
return $ruleset;
}
/**
* Get the selector
*
* @return ?string
*/
public function getSelector(): ?string
{
return $this->selector;
}
/**
* Set the selector
*
* @param string $selector
*
* @return $this
*/
public function setSelector(string $selector): self
{
$this->selector = $selector;
return $this;
}
/**
* Get a property value
*
* @param string $property Name of the property
*
* @return string
*/
public function getProperty(string $property): string
{
return (string) $this[$property];
}
/**
* Set a property
*
* @param string $property Name to use
* @param string $value Value to set
*
* @return $this
*/
public function setProperty(string $property, string $value): self
{
$this[$property] = $value;
return $this;
}
/**
* Get all properties
*
* @return array<string, string>
*/
public function getProperties(): array
{
return $this->getArrayCopy();
}
/**
* Set properties
*
* @param array<string, string> $properties
*
* @return $this
*/
public function setProperties(array $properties): self
{
$this->exchangeArray($properties);
return $this;
}
/**
* Create and add a ruleset
*
* @param string $selector Selector to use
* @param array<string, string> $properties CSS properties
*
* @return $this
*/
public function add(string $selector, array $properties): self
{
$this->children[] = static::create($selector, $properties);
return $this;
}
/**
* Add a ruleset
*
* @param LessRuleset $ruleset
*
* @return $this
*/
public function addRuleset(LessRuleset $ruleset): self
{
$this->children[] = $ruleset;
return $this;
}
/**
* Compile the ruleset to CSS
*
* @return string
*/
public function renderCss(): string
{
$parser = new Less_Parser(['compress' => true]);
$parser->parse($this->renderLess());
return $parser->getCss();
}
/**
* Render the ruleset to LESS
*
* @return string
*/
protected function renderLess(): string
{
$less = [];
foreach ($this as $property => $value) {
$less[] = "$property: $value;";
}
foreach ($this->children as $ruleset) {
$less[] = $ruleset->renderLess();
}
if ($this->selector !== null) {
array_unshift($less, "$this->selector {");
$less[] = '}';
}
return implode("\n", $less);
}
}
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