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| 1 | <?php |
| 2 | |
| 3 | declare( strict_types = 1 ); |
| 4 | |
| 5 | namespace MediaWiki\Extension\Math\WikiTexVC\Nodes; |
| 6 | |
| 7 | use MediaWiki\Extension\Math\WikiTexVC\MMLmappings\BaseParsing; |
| 8 | use MediaWiki\Extension\Math\WikiTexVC\MMLnodes\MMLmrow; |
| 9 | use MediaWiki\Extension\Math\WikiTexVC\MMLnodes\MMLmsub; |
| 10 | use MediaWiki\Extension\Math\WikiTexVC\MMLnodes\MMLmunder; |
| 11 | use MediaWiki\Extension\Math\WikiTexVC\TexUtil; |
| 12 | |
| 13 | class DQ extends TexNode { |
| 14 | /** @var TexNode */ |
| 15 | private $base; |
| 16 | /** @var TexNode */ |
| 17 | private $down; |
| 18 | |
| 19 | public function __construct( TexNode $base, TexNode $down ) { |
| 20 | parent::__construct( $base, $down ); |
| 21 | $this->base = $base; |
| 22 | $this->down = $down; |
| 23 | } |
| 24 | |
| 25 | /** |
| 26 | * @return TexNode |
| 27 | */ |
| 28 | public function getBase(): TexNode { |
| 29 | return $this->base; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * @return TexNode |
| 34 | */ |
| 35 | public function getDown(): TexNode { |
| 36 | return $this->down; |
| 37 | } |
| 38 | |
| 39 | /** @inheritDoc */ |
| 40 | public function render() { |
| 41 | return $this->base->render() . '_' . $this->down->inCurlies(); |
| 42 | } |
| 43 | |
| 44 | /** @inheritDoc */ |
| 45 | public function renderMML( $arguments = [], &$state = [] ) { |
| 46 | if ( array_key_exists( "limits", $state ) ) { |
| 47 | // A specific DQ case with preceding limits, just invoke the limits parsing manually. |
| 48 | return BaseParsing::limits( $this, $arguments, $state, "" ); |
| 49 | } |
| 50 | |
| 51 | if ( !$this->isEmpty() ) { |
| 52 | if ( $this->getBase()->containsFunc( "\underbrace" ) ) { |
| 53 | $outer = new MMLmunder(); |
| 54 | } else { |
| 55 | $outer = new MMLmsub(); |
| 56 | if ( ( $state['styleargs']['displaystle'] ?? 'true' ) === 'true' ) { |
| 57 | $tu = TexUtil::getInstance(); |
| 58 | if ( $tu->operator( trim( $this->base->render() ) ) ) { |
| 59 | $outer = new MMLmunder(); |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | // Otherwise use default fallback |
| 64 | $mmlMrow = new MMLmrow(); |
| 65 | $inner_state = [ 'styleargs' => $state['styleargs'] ?? [] ]; |
| 66 | $baseRendering = $this->base->renderMML( $arguments, $inner_state ); |
| 67 | // In cases with empty curly preceding like: "{}_pF_q" or _{1} |
| 68 | if ( trim( $baseRendering ) === "" ) { |
| 69 | $baseRendering = ( new MMLmrow() )->getEmpty(); |
| 70 | } |
| 71 | return $outer->encapsulateRaw( |
| 72 | $baseRendering . |
| 73 | $mmlMrow->encapsulateRaw( $this->down->renderMML( $arguments, $state ) ) ); |
| 74 | } |
| 75 | |
| 76 | return ""; |
| 77 | } |
| 78 | |
| 79 | /** @inheritDoc */ |
| 80 | public function extractIdentifiers( $args = null ) { |
| 81 | $d = $this->down->extractSubscripts(); |
| 82 | $b = $this->base->extractIdentifiers(); |
| 83 | if ( is_array( $b ) && count( $b ) > 1 ) { |
| 84 | return parent::extractIdentifiers(); |
| 85 | } |
| 86 | |
| 87 | if ( isset( $b[0] ) && $b[0] === '\'' ) { |
| 88 | return array_merge( $b, $d ); |
| 89 | } |
| 90 | |
| 91 | if ( isset( $d[0] ) && isset( $b[0] ) ) { |
| 92 | if ( $b[0] === '\\int' ) { |
| 93 | return array_merge( $b, $d ); |
| 94 | } |
| 95 | return [ $b[0] . '_{' . $d[0] . '}' ]; |
| 96 | } |
| 97 | |
| 98 | return parent::extractIdentifiers(); |
| 99 | } |
| 100 | |
| 101 | /** @inheritDoc */ |
| 102 | public function extractSubscripts() { |
| 103 | $d = array_merge( [], $this->down->extractSubscripts() ); |
| 104 | $b = $this->base->extractSubscripts(); |
| 105 | if ( isset( $b[0] ) && isset( $d[0] ) ) { |
| 106 | return [ $b[0] . '_{' . implode( '', $d ) . '}' ]; |
| 107 | } |
| 108 | return parent::extractSubscripts(); |
| 109 | } |
| 110 | |
| 111 | /** @inheritDoc */ |
| 112 | public function getModIdent() { |
| 113 | $d = $this->down->extractSubscripts(); |
| 114 | $b = $this->base->getModIdent(); |
| 115 | if ( isset( $b[0] ) && $b[0] === '\'' ) { |
| 116 | return []; |
| 117 | } |
| 118 | if ( isset( $d[0] ) && isset( $b[0] ) ) { |
| 119 | return [ $b[0] . '_{' . $d[0] . '}' ]; |
| 120 | } |
| 121 | |
| 122 | return parent::getModIdent(); |
| 123 | } |
| 124 | |
| 125 | } |