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| Less_Tree | |
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| genCSS | |
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| compile | |
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| _operate | |
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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Tree |
| 5 | */ |
| 6 | class Less_Tree { |
| 7 | |
| 8 | public $parensInOp = false; |
| 9 | public $extendOnEveryPath; |
| 10 | public $allExtends; |
| 11 | |
| 12 | /** |
| 13 | * @var Less_Parser |
| 14 | * @see less-3.13.1.js#Node.prototype.parse |
| 15 | */ |
| 16 | public static $parse; |
| 17 | |
| 18 | /** |
| 19 | * @see less-2.5.3.js#Node.prototype.toCSS |
| 20 | */ |
| 21 | public function toCSS() { |
| 22 | $output = new Less_Output(); |
| 23 | $this->genCSS( $output ); |
| 24 | return $output->toString(); |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Generate CSS by adding it to the output object |
| 29 | * |
| 30 | * @param Less_Output $output The output |
| 31 | * @return void |
| 32 | */ |
| 33 | public function genCSS( $output ) { |
| 34 | } |
| 35 | |
| 36 | public function compile( $env ) { |
| 37 | return $this; |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * @param string $op |
| 42 | * @param float $a |
| 43 | * @param float $b |
| 44 | * @see less-2.5.3.js#Node.prototype._operate |
| 45 | */ |
| 46 | protected function _operate( $op, $a, $b ) { |
| 47 | switch ( $op ) { |
| 48 | case '+': |
| 49 | return $a + $b; |
| 50 | case '-': |
| 51 | return $a - $b; |
| 52 | case '*': |
| 53 | return $a * $b; |
| 54 | case '/': |
| 55 | return $a / $b; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * @see less-2.5.3.js#Node.prototype.fround |
| 61 | */ |
| 62 | protected function fround( $value ) { |
| 63 | if ( $value === 0 ) { |
| 64 | return $value; |
| 65 | } |
| 66 | |
| 67 | // TODO: Migrate to passing $env. |
| 68 | if ( Less_Parser::$options['numPrecision'] ) { |
| 69 | $p = pow( 10, Less_Parser::$options['numPrecision'] ); |
| 70 | return round( $value * $p ) / $p; |
| 71 | } |
| 72 | return $value; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * @param Less_Output $output |
| 77 | * @param Less_Tree_Ruleset[] $rules |
| 78 | */ |
| 79 | public static function outputRuleset( $output, $rules ) { |
| 80 | $ruleCnt = count( $rules ); |
| 81 | Less_Environment::$tabLevel++; |
| 82 | |
| 83 | // Compressed |
| 84 | if ( Less_Parser::$options['compress'] ) { |
| 85 | $output->add( '{' ); |
| 86 | for ( $i = 0; $i < $ruleCnt; $i++ ) { |
| 87 | $rules[$i]->genCSS( $output ); |
| 88 | } |
| 89 | |
| 90 | $output->add( '}' ); |
| 91 | Less_Environment::$tabLevel--; |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | // Non-compressed |
| 96 | $tabSetStr = "\n" . str_repeat( Less_Parser::$options['indentation'], Less_Environment::$tabLevel - 1 ); |
| 97 | $tabRuleStr = $tabSetStr . Less_Parser::$options['indentation']; |
| 98 | |
| 99 | $output->add( " {" ); |
| 100 | for ( $i = 0; $i < $ruleCnt; $i++ ) { |
| 101 | $output->add( $tabRuleStr ); |
| 102 | $rules[$i]->genCSS( $output ); |
| 103 | } |
| 104 | Less_Environment::$tabLevel--; |
| 105 | $output->add( $tabSetStr . '}' ); |
| 106 | } |
| 107 | |
| 108 | public function accept( $visitor ) { |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * @param Less_Tree $a |
| 113 | * @param Less_Tree $b |
| 114 | * @return int|null |
| 115 | * @see less-2.5.3.js#Node.compare |
| 116 | */ |
| 117 | public static function nodeCompare( $a, $b ) { |
| 118 | // Less_Tree subclasses that implement compare() are: |
| 119 | // Anonymous, Color, Dimension, Quoted, Unit |
| 120 | $aHasCompare = ( $a instanceof Less_Tree_Anonymous || $a instanceof Less_Tree_Color |
| 121 | || $a instanceof Less_Tree_Dimension || $a instanceof Less_Tree_Quoted || $a instanceof Less_Tree_Unit |
| 122 | ); |
| 123 | $bHasCompare = ( $b instanceof Less_Tree_Anonymous || $b instanceof Less_Tree_Color |
| 124 | || $b instanceof Less_Tree_Dimension || $b instanceof Less_Tree_Quoted || $b instanceof Less_Tree_Unit |
| 125 | ); |
| 126 | |
| 127 | if ( $aHasCompare && |
| 128 | !( $b instanceof Less_Tree_Quoted || $b instanceof Less_Tree_Anonymous ) |
| 129 | ) { |
| 130 | // for "symmetric results" force toCSS-based comparison via b.compare() |
| 131 | // of Quoted or Anonymous if either value is one of those |
| 132 | // @phan-suppress-next-line PhanUndeclaredMethod |
| 133 | return $a->compare( $b ); |
| 134 | } elseif ( $bHasCompare ) { |
| 135 | $res = $b->compare( $a ); |
| 136 | // In JS, `-undefined` produces NAN, which, just like undefined |
| 137 | // will enter the the default/false branch of Less_Tree_Condition#compile. |
| 138 | // In PHP, `-null` is 0. To ensure parity, preserve the null. |
| 139 | return $res !== null ? -$res : null; |
| 140 | } elseif ( get_class( $a ) !== get_class( $b ) ) { |
| 141 | return null; |
| 142 | } |
| 143 | |
| 144 | // Less_Tree subclasses that have an array value: Less_Tree_Expression, Less_Tree_Value |
| 145 | // @phan-suppress-next-line PhanUndeclaredProperty |
| 146 | $aval = $a->value ?? []; |
| 147 | $bval = $b->value ?? []; |
| 148 | if ( !( $a instanceof Less_Tree_Expression || $a instanceof Less_Tree_Value ) ) { |
| 149 | return $aval === $bval ? 0 : null; |
| 150 | } |
| 151 | '@phan-var Less_Tree[] $aval'; |
| 152 | '@phan-var Less_Tree[] $bval'; |
| 153 | if ( count( $aval ) !== count( $bval ) ) { |
| 154 | return null; |
| 155 | } |
| 156 | foreach ( $aval as $i => $item ) { |
| 157 | if ( self::nodeCompare( $item, $bval[$i] ) !== 0 ) { |
| 158 | return null; |
| 159 | } |
| 160 | } |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * @param string|float|int $a |
| 166 | * @param string|float|int $b |
| 167 | * @return int|null |
| 168 | * @see less-2.5.3.js#Node.numericCompare |
| 169 | */ |
| 170 | public static function numericCompare( $a, $b ) { |
| 171 | return $a < $b ? -1 |
| 172 | : ( $a === $b ? 0 |
| 173 | : ( $a > $b ? 1 |
| 174 | // NAN is not greater, less, or equal |
| 175 | : null |
| 176 | ) |
| 177 | ); |
| 178 | } |
| 179 | |
| 180 | public static function ReferencedArray( $rules ) { |
| 181 | foreach ( $rules as $rule ) { |
| 182 | if ( method_exists( $rule, 'markReferenced' ) ) { |
| 183 | $rule->markReferenced(); |
| 184 | } |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Requires php 5.3+ |
| 190 | */ |
| 191 | public static function __set_state( $args ) { |
| 192 | $class = get_called_class(); |
| 193 | $obj = new $class( null, null, null, null ); |
| 194 | foreach ( $args as $key => $val ) { |
| 195 | $obj->$key = $val; |
| 196 | } |
| 197 | return $obj; |
| 198 | } |
| 199 | |
| 200 | } |