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| <?php | |
| declare( strict_types = 1 ); | |
| namespace Wikimedia\Parsoid\Html2Wt; | |
| use Wikimedia\Assert\Assert; | |
| use Wikimedia\Parsoid\Config\WikitextConstants; | |
| use Wikimedia\Parsoid\DOM\Element; | |
| use Wikimedia\Parsoid\Html2Wt\ConstrainedText\LanguageVariantText; | |
| use Wikimedia\Parsoid\Utils\DOMCompat; | |
| use Wikimedia\Parsoid\Utils\DOMDataUtils; | |
| use Wikimedia\Parsoid\Utils\Utils; | |
| /** | |
| * Serializes language variant markup, like `-{ ... }-`. | |
| */ | |
| class LanguageVariantHandler { | |
| /** | |
| * @param array $a | |
| * @return array | |
| */ | |
| private static function expandSpArray( array $a ): array { | |
| $result = []; | |
| foreach ( $a as $el ) { | |
| if ( gettype( $el ) === 'integer' ) { | |
| for ( $i = 0; $i < $el; $i++ ) { | |
| $result[] = ''; | |
| } | |
| } else { | |
| $result[] = $el; | |
| } | |
| } | |
| return $result; | |
| } | |
| /** | |
| * Helper function: serialize a DOM string | |
| * @param SerializerState $state | |
| * @param string $t | |
| * @param ?array $opts | |
| * @return string | |
| */ | |
| private static function ser( SerializerState $state, string $t, ?array $opts ) { | |
| $options = | |
| ( $opts ?? [] ) + [ | |
| 'env' => $state->getEnv(), | |
| 'onSOL' => false | |
| ]; | |
| return $state->serializer->htmlToWikitext( $options, $t ); | |
| } | |
| /** | |
| * Helper function: protect characters not allowed in language names | |
| * @param string $l | |
| * @return string | |
| */ | |
| private static function protectLang( string $l ): string { | |
| if ( preg_match( '/^[a-z][-a-zA-Z]+$/D', $l ) ) { | |
| return $l; | |
| } | |
| return '<nowiki>' . Utils::escapeWtEntities( $l ) . '</nowiki>'; | |
| } | |
| /** | |
| * Helper function: combine the three parts of the -{ }- string | |
| * @param string $flagStr | |
| * @param string $bodyStr | |
| * @param string|bool $useTrailingSemi | |
| * @return string | |
| */ | |
| private static function combine( string $flagStr, string $bodyStr, $useTrailingSemi ): string { | |
| if ( !empty( $flagStr ) || str_contains( $bodyStr, '|' ) ) { | |
| $flagStr .= '|'; | |
| } | |
| if ( $useTrailingSemi !== false ) { | |
| $bodyStr .= ';' . $useTrailingSemi; | |
| } | |
| return $flagStr . $bodyStr; | |
| } | |
| /** | |
| * Canonicalize combinations of flags. | |
| * $originalFlags should be [ 'flag' => <integer position>, ... ] | |
| * @param array $originalFlags | |
| * @param array $flSp | |
| * @param array $flags | |
| * @param bool $noFilter | |
| * @param ?string $protectFunc | |
| * @return string | |
| */ | |
| private static function sortedFlags( | |
| array $originalFlags, array $flSp, array $flags, bool $noFilter, | |
| ?string $protectFunc | |
| ): string { | |
| $filterInternal = static function ( $f ) use ( $noFilter ) { | |
| // Filter out internal-use-only flags | |
| if ( $noFilter ) { | |
| return true; | |
| } | |
| return ( $f[0] ?? null ) !== '$'; | |
| }; | |
| $flags = array_filter( $flags, $filterInternal ); | |
| $sortByOriginalPosition = static function ( $a, $b ) use ( $originalFlags ) { | |
| $ai = $originalFlags[$a] ?? -1; | |
| $bi = $originalFlags[$b] ?? -1; | |
| return $ai - $bi; | |
| }; | |
| usort( $flags, $sortByOriginalPosition ); | |
| $insertOriginalWhitespace = static function ( $f ) use ( $originalFlags, $protectFunc, $flSp ) { | |
| // Reinsert the original whitespace around the flag (if any) | |
| $i = $originalFlags[$f] ?? null; | |
| if ( !empty( $protectFunc ) ) { | |
| $p = call_user_func_array( [ 'self', $protectFunc ], [ $f ] ); | |
| } else { | |
| $p = $f; | |
| } | |
| if ( $i !== null && ( 2 * $i + 1 ) < count( $flSp ) ) { | |
| return $flSp[2 * $i] + $p + $flSp[2 * $i + 1]; | |
| } | |
| return $p; | |
| }; | |
| $flags = array_map( $insertOriginalWhitespace, $flags ); | |
| $s = implode( ';', $flags ); | |
| if ( 2 * count( $originalFlags ) + 1 === count( $flSp ) ) { | |
| if ( count( $flSp ) > 1 || strlen( $s ) ) { | |
| $s .= ';'; | |
| } | |
| $s .= $flSp[2 * count( $originalFlags )]; | |
| } | |
| return $s; | |
| } | |
| /** | |
| * @param array $originalFlags | |
| * @param array &$flags | |
| * @param string $f | |
| */ | |
| private static function maybeDeleteFlag( | |
| array $originalFlags, array &$flags, string $f | |
| ) { | |
| if ( !isset( $originalFlags[$f] ) ) { | |
| unset( $flags[$f] ); | |
| } | |
| } | |
| /** | |
| * LanguageVariantHandler | |
| * @param SerializerState $state | |
| * @param Element $node | |
| * @return void | |
| */ | |
| public static function handleLanguageVariant( SerializerState $state, Element $node ): void { | |
| $dataMWV = DOMDataUtils::getJSONAttribute( $node, 'data-mw-variant', [] ); | |
| $dp = DOMDataUtils::getDataParsoid( $node ); | |
| $flSp = self::expandSpArray( $dp->flSp ?? [] ); | |
| $textSp = self::expandSpArray( $dp->tSp ?? [] ); | |
| $trailingSemi = false; | |
| $text = null; | |
| $flags = []; | |
| $originalFlags = []; | |
| if ( isset( $dp->fl ) ) { | |
| foreach ( $dp->fl as $key => $val ) { | |
| if ( !isset( $originalFlags[$key] ) ) { // was $val | |
| $originalFlags[$val] = $key; | |
| } | |
| } | |
| } | |
| $result = '$E|'; // "error" flag | |
| // Backwards-compatibility: `bidir` => `twoway` ; `unidir` => `oneway` | |
| if ( isset( $dataMWV->bidir ) ) { | |
| $dataMWV->twoway = $dataMWV->bidir; | |
| unset( $dataMWV->bidir ); | |
| } | |
| if ( isset( $dataMWV->unidir ) ) { | |
| $dataMWV->oneway = $dataMWV->undir; | |
| unset( $dataMWV->unidir ); | |
| } | |
| foreach ( get_object_vars( $dataMWV ) as $key => $val ) { | |
| if ( isset( WikitextConstants::$LCNameMap[$key] ) ) { | |
| $flags[WikitextConstants::$LCNameMap[$key]] = true; | |
| } | |
| } | |
| // Tweak flag set to account for implicitly-enabled flags. | |
| if ( DOMCompat::nodeName( $node ) !== 'meta' ) { | |
| $flags['$S'] = true; | |
| } | |
| if ( !isset( $flags['$S'] ) && !isset( $flags['T'] ) && !isset( $dataMWV->filter ) ) { | |
| $flags['H'] = true; | |
| } | |
| if ( count( $flags ) === 1 && isset( $flags['$S'] ) ) { | |
| self::maybeDeleteFlag( $originalFlags, $flags, '$S' ); | |
| } elseif ( isset( $flags['D'] ) ) { | |
| // Weird: Only way to hide a 'describe' rule is to write -{D;A|...}- | |
| if ( isset( $flags['$S'] ) ) { | |
| if ( isset( $flags['A'] ) ) { | |
| $flags['H'] = true; | |
| } | |
| unset( $flags['A'] ); | |
| } else { | |
| $flags['A'] = true; | |
| unset( $flags['H'] ); | |
| } | |
| } elseif ( isset( $flags['T'] ) ) { | |
| if ( isset( $flags['A'] ) && !isset( $flags['$S'] ) ) { | |
| unset( $flags['A'] ); | |
| $flags['H'] = true; | |
| } | |
| } elseif ( isset( $flags['A'] ) ) { | |
| if ( isset( $flags['$S'] ) ) { | |
| self::maybeDeleteFlag( $originalFlags, $flags, '$S' ); | |
| } elseif ( isset( $flags['H'] ) ) { | |
| self::maybeDeleteFlag( $originalFlags, $flags, 'A' ); | |
| } | |
| } elseif ( isset( $flags['R'] ) ) { | |
| self::maybeDeleteFlag( $originalFlags, $flags, '$S' ); | |
| } elseif ( isset( $flags['-'] ) ) { | |
| self::maybeDeleteFlag( $originalFlags, $flags, 'H' ); | |
| } | |
| if ( isset( $dataMWV->filter ) && $dataMWV->filter->l ) { | |
| // "Restrict possible variants to a limited set" | |
| $text = self::ser( $state, $dataMWV->filter->t, [ 'protect' => '/\}-/' ] ); | |
| Assert::invariant( count( $flags ) === 0, 'Error in language variant flags' ); | |
| $result = self::combine( | |
| self::sortedFlags( | |
| $originalFlags, $flSp, $dataMWV->filter->l, true, | |
| 'protectLang' | |
| ), | |
| $text, false | |
| ); | |
| } else { /* no trailing semi */ | |
| if ( isset( $dataMWV->disabled ) || isset( $dataMWV->name ) ) { | |
| // "Raw" / protect contents from language converter | |
| $text = self::ser( $state, ( $dataMWV->disabled ?? $dataMWV->name )->t, | |
| [ 'protect' => '/\}-/' ] ); | |
| if ( !preg_match( '/[:;|]/', $text ) ) { | |
| self::maybeDeleteFlag( $originalFlags, $flags, 'R' ); | |
| } | |
| $result = self::combine( | |
| self::sortedFlags( | |
| $originalFlags, $flSp, array_keys( $flags ), false, null | |
| ), | |
| $text, false | |
| ); | |
| } elseif ( isset( $dataMWV->twoway ) ) { | |
| // Two-way rules (most common) | |
| if ( count( $textSp ) % 3 === 1 ) { | |
| $trailingSemi = $textSp[count( $textSp ) - 1]; | |
| } | |
| $b = isset( $dataMWV->twoway[0] ) && $dataMWV->twoway[0]->l === '*' ? | |
| array_slice( $dataMWV->twoway, 0, 1 ) : | |
| $dataMWV->twoway ?? false; | |
| $text = implode( ';', | |
| array_map( function ( $rule, $idx ) use ( $state, $textSp ) { | |
| $text = self::ser( $state, $rule->t, [ 'protect' => '/;|\}-/' ] ); | |
| if ( $rule->l === '*' ) { | |
| $trailingSemi = false; | |
| return $text; | |
| } | |
| $length = ( 3 * ( $idx + 1 ) ) - ( 3 * $idx ); | |
| $ws = ( 3 * $idx + 2 < count( $textSp ) ) ? | |
| array_slice( $textSp, 3 * $idx, $length ) : | |
| [ ( $idx > 0 ) ? ' ' : '', '', '' ]; | |
| return $ws[0] . self::protectLang( $rule->l ) . $ws[1] . ':' . $ws[2] . $text; | |
| }, $b, range( 0, count( $b ) - 1 ) | |
| ) | |
| ); | |
| // suppress output of default flag ('S') | |
| self::maybeDeleteFlag( $originalFlags, $flags, '$S' ); | |
| $result = self::combine( | |
| self::sortedFlags( | |
| $originalFlags, $flSp, array_keys( $flags ), false, null | |
| ), | |
| $text, $trailingSemi | |
| ); | |
| } elseif ( isset( $dataMWV->oneway ) ) { | |
| // One-way rules (uncommon) | |
| if ( count( $textSp ) % 4 === 1 ) { | |
| $trailingSemi = $textSp[count( $textSp ) - 1]; | |
| } | |
| $text = implode( ';', | |
| array_map( function ( $rule, $idx ) use ( $state, $textSp ) { | |
| $from = self::ser( $state, $rule->f, [ 'protect' => '/:|;|=>|\}-/' ] ); | |
| $to = self::ser( $state, $rule->t, [ 'protect' => '/;|\}-/' ] ); | |
| $length = ( 4 * ( $idx + 1 ) ) - ( 4 * $idx ); | |
| $ws = ( 4 * $idx + 3 < count( $textSp ) ) ? | |
| array_slice( $textSp, 4 * $idx, $length ) : | |
| [ '', '', '', '' ]; | |
| return $ws[0] . $from . '=>' . $ws[1] . self::protectLang( $rule->l ) . | |
| $ws[2] . ':' . $ws[3] . $to; | |
| }, $dataMWV->oneway, range( 0, count( $dataMWV->oneway ) - 1 ) | |
| ) | |
| ); | |
| $result = self::combine( | |
| self::sortedFlags( | |
| $originalFlags, $flSp, array_keys( $flags ), false, null | |
| ), | |
| $text, $trailingSemi | |
| ); | |
| } | |
| } | |
| $state->emitChunk( new LanguageVariantText( '-{' . $result . '}-', $node ), $node ); | |
| } | |
| } |