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|
<?php
namespace LesserPHP\Functions;
use Exception;
use LesserPHP\Utils\Color;
use LesserPHP\Utils\Util;
/**
* Implements the string functions for LESS
*
* @link https://lesscss.org/functions/#string-functions
*/
class Strings extends AbstractFunctionCollection
{
/** @inheritdoc */
public function getFunctions(): array
{
return [
//'escape' => [$this, 'escape'],
'e' => [$this, 'e'],
'%' => [$this, 'format'],
//'replace' => [$this, 'replace'],
];
}
// escape is missing
/**
* String escaping.
*
* It expects string as a parameter and return its content as is, but without quotes. It can be used
* to output CSS value which is either not valid CSS syntax, or uses proprietary syntax which
* Less doesn't recognize.
*
* @link https://lesscss.org/functions/#string-functions-e
* @throws Exception
*/
public function e(array $arg): array
{
return $this->lessc->unwrap($arg);
}
/**
* Formats a string
*
* @link https://lesscss.org/functions/#string-functions--format
* @throws Exception
*/
public function format(array $args) : array
{
if ($args[0] != 'list') return $args;
$values = $args[2];
$string = array_shift($values);
$template = $this->lessc->compileValue($this->lessc->unwrap($string));
$i = 0;
if (preg_match_all('/%[dsa]/', $template, $m)) {
foreach ($m[0] as $match) {
$val = isset($values[$i]) ?
$this->lessc->reduce($values[$i]) : ['keyword', ''];
// lessjs compat, renders fully expanded color, not raw color
if ($color = Color::coerceColor($val)) {
$val = $color;
}
$i++;
$rep = $this->lessc->compileValue($this->lessc->unwrap($val));
$template = preg_replace(
'/' . Util::pregQuote($match) . '/',
$rep,
$template,
1
);
}
}
$d = $string[0] == 'string' ? $string[1] : '"';
return ['string', $d, [$template]];
}
// replace is missing
}
|
