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HtmlStyleUtils.php
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HtmlStyleUtils.php
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<?php
namespace MobileFrontend\Transforms\Utils;
/**
* Simple utility class for working with html styles as with key-value array
*/
class HtmlStyleUtils {
/**
* Parse html `styles` string into kev-value array
*
* @param string $styleAttr Element or document to rewrite images in.
*
* @return array
*/
public static function parseStyleString( string $styleAttr ): array {
if ( $styleAttr === '' ) {
return [];
}
$styleStrings = preg_split( '/\;/', $styleAttr, -1, PREG_SPLIT_NO_EMPTY );
$result = [];
foreach ( $styleStrings as $styleString ) {
$styleWithValue = explode( ':', $styleString );
$style = trim( $styleWithValue[0] );
if ( $style !== '' ) {
$result[$style] = trim( $styleWithValue[1] ?? '' );
}
}
return $result;
}
/**
* Forms style's string from kev-value array
*
* @param array $styles
*
* @return string
*/
public static function formStyleString( array $styles ): string {
$styleString = '';
foreach ( $styles as $style => $value ) {
if ( $value === '' ) {
$styleString .= $style . ';';
} else {
$styleString .= $style . ': ' . $value . ';';
}
}
return $styleString;
}
/**
* Filters style key-value array by list of allowed styles, appending them by
* list of additional styles
*
* @param array $styles key-value array of html styles
* @param string[] $allowedStyles list of allowed styles
* @param array $additional key-value array of additional styles should be added in front of list
*
* @return array
*/
public static function filterAllowedStyles( array $styles, array $allowedStyles, array $additional ): array {
return $additional + array_intersect_key(
$styles,
array_fill_keys( $allowedStyles, '' )
);
}
}

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HtmlStyleUtils.php (1 KB)

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