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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\MMLmstyle; |
| 10 | use MediaWiki\Extension\Math\WikiTexVC\MMLnodes\MMLmsubsup; |
| 11 | use MediaWiki\Extension\Math\WikiTexVC\MMLnodes\MMLmunderover; |
| 12 | use MediaWiki\Extension\Math\WikiTexVC\TexUtil; |
| 13 | |
| 14 | class FQ extends TexNode { |
| 15 | |
| 16 | /** @var TexNode */ |
| 17 | private $base; |
| 18 | /** @var TexNode */ |
| 19 | private $up; |
| 20 | /** @var TexNode */ |
| 21 | private $down; |
| 22 | |
| 23 | public function __construct( TexNode $base, TexNode $down, TexNode $up ) { |
| 24 | parent::__construct( $base, $down, $up ); |
| 25 | $this->base = $base; |
| 26 | $this->up = $up; |
| 27 | $this->down = $down; |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * @return TexNode |
| 32 | */ |
| 33 | public function getBase(): TexNode { |
| 34 | return $this->base; |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * @return TexNode |
| 39 | */ |
| 40 | public function getUp(): TexNode { |
| 41 | return $this->up; |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * @return TexNode |
| 46 | */ |
| 47 | public function getDown(): TexNode { |
| 48 | return $this->down; |
| 49 | } |
| 50 | |
| 51 | /** @inheritDoc */ |
| 52 | public function render() { |
| 53 | return $this->base->render() . '_' . $this->down->inCurlies() . '^' . $this->up->inCurlies(); |
| 54 | } |
| 55 | |
| 56 | /** @inheritDoc */ |
| 57 | public function renderMML( $arguments = [], &$state = [] ) { |
| 58 | if ( array_key_exists( "limits", $state ) ) { |
| 59 | // A specific FQ case with preceding limits, just invoke the limits parsing manually. |
| 60 | return BaseParsing::limits( $this, $arguments, $state, "" ); |
| 61 | } |
| 62 | $base = $this->getBase(); |
| 63 | |
| 64 | if ( $base->getLength() == 0 && !$base->isCurly() ) { |
| 65 | // this happens when FQ is located in Sideset (is this a common parsing way?) |
| 66 | $mrow = new MMLmrow(); |
| 67 | return $mrow->encapsulateRaw( $this->getDown()->renderMML( [], $state ) ) . |
| 68 | $mrow->encapsulateRaw( $this->getUp()->renderMML( [], $state ) ); |
| 69 | } |
| 70 | |
| 71 | $melement = new MMLmsubsup(); |
| 72 | // tbd check for more such cases like TexUtilTest 317 |
| 73 | if ( $base instanceof Literal ) { |
| 74 | $litArg = trim( $base->getArgs()[0] ); |
| 75 | $tu = TexUtil::getInstance(); |
| 76 | // "sum", "bigcap", "bigcup", "prod" ... all are nullary macros. |
| 77 | if ( $tu->nullary_macro( $litArg ) && |
| 78 | !$tu->is_literal( $litArg ) && |
| 79 | // by default (inline-displaystyle large operators should be used) |
| 80 | ( $state['styleargs']['displaystyle'] ?? 'true' ) === 'true' |
| 81 | ) { |
| 82 | $melement = new MMLmunderover(); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | $mrow = new MMLmrow(); |
| 87 | $emptyMrow = ""; |
| 88 | // In cases with empty curly preceding like: "{}_1^2\!\Omega_3^4" |
| 89 | if ( $base->isCurly() && $base->isEmpty() ) { |
| 90 | $emptyMrow = $mrow->getEmpty(); |
| 91 | } |
| 92 | // This seems to be the common case |
| 93 | $inner = $melement->encapsulateRaw( |
| 94 | $emptyMrow . |
| 95 | $base->renderMML( [], $state ) . |
| 96 | $mrow->encapsulateRaw( $this->getDown()->renderMML( $arguments, $state ) ) . |
| 97 | $mrow->encapsulateRaw( $this->getUp()->renderMML( $arguments, $state ) ) ); |
| 98 | |
| 99 | if ( $melement instanceof MMLmunderover ) { |
| 100 | $args = $state['styleargs'] ?? [ "displaystyle" => "true", "scriptlevel" => 0 ]; |
| 101 | $style = new MMLmstyle( "", $args ); |
| 102 | return $style->encapsulateRaw( $inner ); |
| 103 | } |
| 104 | |
| 105 | return $inner; |
| 106 | } |
| 107 | } |