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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | namespace Wikimedia\Parsoid\Html2Wt\DOMHandlers; |
| 5 | |
| 6 | use Wikimedia\Parsoid\DOM\Element; |
| 7 | use Wikimedia\Parsoid\DOM\Node; |
| 8 | use Wikimedia\Parsoid\Html2Wt\SerializerState; |
| 9 | use Wikimedia\Parsoid\Utils\DOMCompat; |
| 10 | use Wikimedia\Parsoid\Utils\DOMDataUtils; |
| 11 | use Wikimedia\Parsoid\Utils\PHPUtils; |
| 12 | use Wikimedia\Parsoid\Utils\Utils; |
| 13 | |
| 14 | class PreHandler extends DOMHandler { |
| 15 | |
| 16 | public function __construct() { |
| 17 | parent::__construct( false ); |
| 18 | } |
| 19 | |
| 20 | /** @inheritDoc */ |
| 21 | public function handle( |
| 22 | Element $node, SerializerState $state, bool $wrapperUnmodified = false |
| 23 | ): ?Node { |
| 24 | // Handle indent pre |
| 25 | |
| 26 | // XXX: Use a pre escaper? |
| 27 | $content = $state->serializeIndentPreChildrenToString( $node ); |
| 28 | // Strip (only the) trailing newline |
| 29 | $trailingNL = str_ends_with( $content, "\n" ) ? "\n" : ''; |
| 30 | if ( $trailingNL !== '' ) { |
| 31 | $content = substr( $content, 0, -1 ); |
| 32 | } |
| 33 | |
| 34 | // Insert indentation |
| 35 | $solRE = '/' |
| 36 | . '(\n(' |
| 37 | // SSS FIXME: What happened to the includeonly seen |
| 38 | // in wts.separators.js? |
| 39 | . PHPUtils::reStrip( Utils::COMMENT_REGEXP ) |
| 40 | . ')*)' |
| 41 | . '/'; |
| 42 | $content = ' ' . preg_replace( $solRE, '$1 ', $content ); |
| 43 | |
| 44 | // But skip "empty lines" (lines with 1+ comment and |
| 45 | // optional whitespace) since empty-lines sail through all |
| 46 | // handlers without being affected. |
| 47 | // |
| 48 | // See empty_line_with_comments rule in pegTokenizer.pegjs |
| 49 | // |
| 50 | // We could use 'split' to split content into lines and |
| 51 | // selectively add indentation, but the code will get |
| 52 | // unnecessarily complex for questionable benefits. So, going |
| 53 | // this route for now. |
| 54 | $emptyLinesRE = '/' |
| 55 | // This space comes from what we inserted earlier |
| 56 | . '(^|\n) ' |
| 57 | . '((?:' |
| 58 | . '[ \t]*' |
| 59 | . PHPUtils::reStrip( Utils::COMMENT_REGEXP ) |
| 60 | . '[ \t]*' |
| 61 | . ')+)' |
| 62 | . '(?=\n|$)' |
| 63 | . '/D'; |
| 64 | $content = preg_replace( $emptyLinesRE, '$1$2', $content, 1 ); |
| 65 | |
| 66 | $state->emitChunk( $content, $node ); |
| 67 | |
| 68 | // Preserve separator source |
| 69 | $state->appendSep( $trailingNL ); |
| 70 | return $node->nextSibling; |
| 71 | } |
| 72 | |
| 73 | /** @inheritDoc */ |
| 74 | public function before( Element $node, Node $otherNode, SerializerState $state ): array { |
| 75 | if ( $otherNode instanceof Element // for static analyzers |
| 76 | && DOMCompat::nodeName( $otherNode ) === 'pre' |
| 77 | && ( DOMDataUtils::getDataParsoid( $otherNode )->stx ?? null ) !== 'html' |
| 78 | ) { |
| 79 | return [ 'min' => 2 ]; |
| 80 | } else { |
| 81 | return [ 'min' => 1 ]; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /** @inheritDoc */ |
| 86 | public function after( Element $node, Node $otherNode, SerializerState $state ): array { |
| 87 | if ( $otherNode instanceof Element // for static analyzers |
| 88 | && DOMCompat::nodeName( $otherNode ) === 'pre' |
| 89 | && ( DOMDataUtils::getDataParsoid( $otherNode )->stx ?? null ) !== 'html' |
| 90 | ) { |
| 91 | return [ 'min' => 2 ]; |
| 92 | } else { |
| 93 | return [ 'min' => 1 ]; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /** @inheritDoc */ |
| 98 | public function firstChild( Node $node, Node $otherNode, SerializerState $state ): array { |
| 99 | return []; |
| 100 | } |
| 101 | |
| 102 | /** @inheritDoc */ |
| 103 | public function lastChild( Node $node, Node $otherNode, SerializerState $state ): array { |
| 104 | return []; |
| 105 | } |
| 106 | |
| 107 | } |