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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | /** |
| 5 | * @file |
| 6 | * @license https://opensource.org/licenses/Apache-2.0 Apache-2.0 |
| 7 | */ |
| 8 | |
| 9 | namespace Wikimedia\CSS; |
| 10 | |
| 11 | use InvalidArgumentException; |
| 12 | use Wikimedia\CSS\Objects\ComponentValue; |
| 13 | use Wikimedia\CSS\Objects\ComponentValueList; |
| 14 | use Wikimedia\CSS\Objects\CSSObject; |
| 15 | use Wikimedia\CSS\Objects\Token; |
| 16 | use Wikimedia\CSS\Objects\TokenList; |
| 17 | |
| 18 | /** |
| 19 | * Static utility functions |
| 20 | */ |
| 21 | class Util { |
| 22 | |
| 23 | /** |
| 24 | * Check that all elements in an array implement a particular class |
| 25 | * @param array $array |
| 26 | * @param string $class |
| 27 | * @param string $what Describe the array being checked |
| 28 | * @throws InvalidArgumentException |
| 29 | */ |
| 30 | public static function assertAllInstanceOf( array $array, $class, $what ) { |
| 31 | foreach ( $array as $k => $v ) { |
| 32 | if ( !$v instanceof $class ) { |
| 33 | $vtype = is_object( $v ) ? get_class( $v ) : gettype( $v ); |
| 34 | throw new InvalidArgumentException( |
| 35 | "$what may only contain instances of $class" . |
| 36 | " (found $vtype at index $k)" |
| 37 | ); |
| 38 | } |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Check that a set of tokens are all the same type |
| 44 | * @param Token[] $array |
| 45 | * @param string $type |
| 46 | * @param string $what Describe the array being checked |
| 47 | * @throws InvalidArgumentException |
| 48 | */ |
| 49 | public static function assertAllTokensOfType( array $array, $type, $what ) { |
| 50 | foreach ( $array as $k => $v ) { |
| 51 | if ( !$v instanceof Token ) { |
| 52 | $vtype = is_object( $v ) ? get_class( $v ) : gettype( $v ); |
| 53 | throw new InvalidArgumentException( |
| 54 | "$what may only contain instances of " . Token::class . |
| 55 | " (found $vtype at index $k)" |
| 56 | ); |
| 57 | } |
| 58 | if ( $v->type() !== $type ) { |
| 59 | throw new InvalidArgumentException( |
| 60 | "$what may only contain \"$type\" tokens" . |
| 61 | " (found \"{$v->type()}\" at index $k)" |
| 62 | ); |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Find the first non-whitespace ComponentValue in a list |
| 69 | * @param TokenList|ComponentValueList $list |
| 70 | * @return ComponentValue|null |
| 71 | */ |
| 72 | public static function findFirstNonWhitespace( $list ) { |
| 73 | if ( !$list instanceof TokenList && !$list instanceof ComponentValueList ) { |
| 74 | throw new InvalidArgumentException( 'List must be TokenList or ComponentValueList' ); |
| 75 | } |
| 76 | foreach ( $list as $v ) { |
| 77 | if ( !$v instanceof Token || $v->type() !== Token::T_WHITESPACE ) { |
| 78 | return $v; |
| 79 | } |
| 80 | } |
| 81 | return null; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Turn a CSSObject into a string |
| 86 | * @param CSSObject|CSSObject[] $object |
| 87 | * @param array $options Serialization options: |
| 88 | * - minify: (bool) Skip comments and insignificant tokens |
| 89 | * @return string |
| 90 | */ |
| 91 | public static function stringify( $object, $options = [] ) { |
| 92 | if ( is_array( $object ) ) { |
| 93 | $tokens = array_reduce( $object, static function ( array $carry, CSSObject $item ) { |
| 94 | return array_merge( $carry, $item->toTokenArray() ); |
| 95 | }, [] ); |
| 96 | } else { |
| 97 | $tokens = $object->toTokenArray(); |
| 98 | } |
| 99 | if ( !$tokens ) { |
| 100 | return ''; |
| 101 | } |
| 102 | |
| 103 | if ( !empty( $options['minify'] ) ) { |
| 104 | // Last second check for significant whitespace |
| 105 | $e = count( $tokens ) - 1; |
| 106 | for ( $i = 1; $i < $e; $i++ ) { |
| 107 | $t = $tokens[$i]; |
| 108 | if ( $t->type() === Token::T_WHITESPACE && !$t->significant() && |
| 109 | Token::separate( $tokens[$i - 1], $tokens[$i + 1] ) |
| 110 | ) { |
| 111 | $tokens[$i] = $t->copyWithSignificance( true ); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | // Filter! |
| 116 | $tokens = array_filter( $tokens, static function ( $t ) { |
| 117 | return $t->significant(); |
| 118 | } ); |
| 119 | } |
| 120 | |
| 121 | $prev = reset( $tokens ); |
| 122 | $ret = (string)$prev; |
| 123 | $urangeHack = 0; |
| 124 | // @phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 125 | while ( ( $token = next( $tokens ) ) !== false ) { |
| 126 | // Avoid serializing tokens that are part of a <urange> with extraneous comments |
| 127 | // by checking for a hack-flag in the type. |
| 128 | // @see Wikimedia\CSS\Matcher\UrangeMatcher |
| 129 | // @phan-suppress-next-line PhanAccessMethodInternal |
| 130 | $urangeHack = max( $urangeHack, $prev->urangeHack() ); |
| 131 | |
| 132 | if ( --$urangeHack <= 0 && Token::separate( $prev, $token ) ) { |
| 133 | // Per https://www.w3.org/TR/2021/CRD-css-syntax-3-20211224/#serialization |
| 134 | $ret .= '/**/'; |
| 135 | } |
| 136 | $ret .= (string)$token; |
| 137 | $prev = $token; |
| 138 | } |
| 139 | return $ret; |
| 140 | } |
| 141 | } |