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| 1 | <?php |
| 2 | |
| 3 | namespace MobileFrontend\Transforms\Utils; |
| 4 | |
| 5 | /** |
| 6 | * Simple utility class for working with html styles as with key-value array |
| 7 | */ |
| 8 | class HtmlStyleUtils { |
| 9 | /** |
| 10 | * Parse html `styles` string into kev-value array |
| 11 | * |
| 12 | * @param string $styleAttr Element or document to rewrite images in. |
| 13 | * |
| 14 | * @return array |
| 15 | */ |
| 16 | public static function parseStyleString( string $styleAttr ): array { |
| 17 | if ( $styleAttr === '' ) { |
| 18 | return []; |
| 19 | } |
| 20 | $styleStrings = preg_split( '/\;/', $styleAttr, -1, PREG_SPLIT_NO_EMPTY ); |
| 21 | $result = []; |
| 22 | foreach ( $styleStrings as $styleString ) { |
| 23 | $styleWithValue = explode( ':', $styleString ); |
| 24 | $style = trim( $styleWithValue[0] ); |
| 25 | if ( $style !== '' ) { |
| 26 | $result[$style] = trim( $styleWithValue[1] ?? '' ); |
| 27 | } |
| 28 | } |
| 29 | return $result; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * Forms style's string from kev-value array |
| 34 | * |
| 35 | * @param array $styles |
| 36 | * |
| 37 | * @return string |
| 38 | */ |
| 39 | public static function formStyleString( array $styles ): string { |
| 40 | $styleString = ''; |
| 41 | foreach ( $styles as $style => $value ) { |
| 42 | if ( $value === '' ) { |
| 43 | $styleString .= $style . ';'; |
| 44 | |
| 45 | } else { |
| 46 | $styleString .= $style . ': ' . $value . ';'; |
| 47 | } |
| 48 | } |
| 49 | return $styleString; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Filters style key-value array by list of allowed styles, appending them by |
| 54 | * list of additional styles |
| 55 | * |
| 56 | * @param array $styles key-value array of html styles |
| 57 | * @param string[] $allowedStyles list of allowed styles |
| 58 | * @param array $additional key-value array of additional styles should be added in front of list |
| 59 | * |
| 60 | * @return array |
| 61 | */ |
| 62 | public static function filterAllowedStyles( array $styles, array $allowedStyles, array $additional ): array { |
| 63 | return $additional + array_intersect_key( |
| 64 | $styles, |
| 65 | array_fill_keys( $allowedStyles, '' ) |
| 66 | ); |
| 67 | } |
| 68 | } |