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| 1 | <?php |
| 2 | |
| 3 | declare( strict_types = 1 ); |
| 4 | |
| 5 | namespace MediaWiki\Extension\Math\WikiTexVC\Nodes; |
| 6 | |
| 7 | use InvalidArgumentException; |
| 8 | |
| 9 | class Matrix extends TexNode { |
| 10 | |
| 11 | /** @var string */ |
| 12 | private $top; |
| 13 | /** @var TexArray */ |
| 14 | private $mainarg; |
| 15 | |
| 16 | /** |
| 17 | * @param string $top |
| 18 | * @param TexArray $mainarg |
| 19 | * @throws InvalidArgumentException if nested arguments are not of type TexArray |
| 20 | */ |
| 21 | public function __construct( string $top, TexArray $mainarg ) { |
| 22 | foreach ( $mainarg->args as $arg ) { |
| 23 | if ( !$arg instanceof TexArray ) { |
| 24 | throw new InvalidArgumentException( 'Nested arguments have to be type of TexArray' ); |
| 25 | } |
| 26 | } |
| 27 | parent::__construct( $top, $mainarg ); |
| 28 | $this->top = $top; |
| 29 | $this->mainarg = $mainarg; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * @return string |
| 34 | */ |
| 35 | public function getTop(): string { |
| 36 | return $this->top; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * @return TexArray |
| 41 | */ |
| 42 | public function getMainarg(): TexArray { |
| 43 | return $this->mainarg; |
| 44 | } |
| 45 | |
| 46 | public function containsFunc( $target, $args = null ) { |
| 47 | if ( $args == null ) { |
| 48 | $args = [ |
| 49 | '\\begin{' . $this->top . '}', |
| 50 | '\\end{' . $this->top . '}', |
| 51 | $this->mainarg |
| 52 | ]; |
| 53 | } |
| 54 | return parent::containsFunc( $target, $args ); |
| 55 | } |
| 56 | |
| 57 | public function inCurlies() { |
| 58 | return $this->render(); |
| 59 | } |
| 60 | |
| 61 | public function render() { |
| 62 | return '{\\begin{' . $this->top . '}' . $this->renderMatrix( $this->mainarg ) . '\\end{' . $this->top . '}}'; |
| 63 | } |
| 64 | |
| 65 | public function renderMML( $arguments = [], $state = [] ): string { |
| 66 | return $this->parseToMML( $this->getTop(), $arguments, null ); |
| 67 | } |
| 68 | |
| 69 | private function renderMatrix( $matrix ) { |
| 70 | $mapped = array_map( [ self::class, 'renderLine' ], $matrix->args ); |
| 71 | return implode( '\\\\', $mapped ); |
| 72 | } |
| 73 | |
| 74 | private static function renderLine( $l ) { |
| 75 | $mapped = array_map( static function ( $x ){ |
| 76 | return $x->render(); |
| 77 | }, $l->args ); |
| 78 | return implode( '&', $mapped ); |
| 79 | } |
| 80 | |
| 81 | public function extractIdentifiers( $args = null ) { |
| 82 | if ( $args == null ) { |
| 83 | $args = [ $this->mainarg ]; |
| 84 | } |
| 85 | |
| 86 | $mapped = array_map( function ( $a ){ |
| 87 | return array_map( function ( $p ){ |
| 88 | return parent::extractIdentifiers( $p->args ); |
| 89 | }, $a->args ); |
| 90 | }, $args ); |
| 91 | |
| 92 | return self::flatDeep( $mapped ); |
| 93 | } |
| 94 | |
| 95 | private static function flatDeep( $a ) { |
| 96 | if ( !is_array( $a ) ) { |
| 97 | return $a; |
| 98 | } |
| 99 | |
| 100 | $reduced = array_reduce( $a, [ self::class, 'reduceCallback' ], [] ); |
| 101 | return $reduced; |
| 102 | } |
| 103 | |
| 104 | private static function reduceCallback( $acc, $val ) { |
| 105 | // Casting to array if output is string, this is required for array_merge function. |
| 106 | $fld = self::flatDeep( $val ); |
| 107 | if ( !is_array( $fld ) ) { |
| 108 | $fld = [ $fld ]; |
| 109 | } |
| 110 | return array_merge( $acc, $fld ); |
| 111 | } |
| 112 | |
| 113 | } |