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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Parsoid; |
| 4 | |
| 5 | use DOMDocument; |
| 6 | use DOMXPath; |
| 7 | use Flow\Conversion\Utils; |
| 8 | use Flow\Exception\FlowException; |
| 9 | use Flow\Model\AbstractRevision; |
| 10 | use MediaWiki\Title\Title; |
| 11 | |
| 12 | class ContentFixer { |
| 13 | /** |
| 14 | * @var Fixer[] |
| 15 | */ |
| 16 | protected $contentFixers = []; |
| 17 | |
| 18 | /** |
| 19 | * Accepts multiple content fixers. |
| 20 | * |
| 21 | * @param Fixer $contentFixer,... |
| 22 | * @throws FlowException When provided arguments are not an instance of Fixer |
| 23 | */ |
| 24 | public function __construct( Fixer $contentFixer /* [, Fixer $contentFixer2 [, ...]] */ ) { |
| 25 | $this->contentFixers = func_get_args(); |
| 26 | |
| 27 | // validate data |
| 28 | foreach ( $this->contentFixers as $contentFixer ) { |
| 29 | if ( !$contentFixer instanceof Fixer ) { |
| 30 | throw new FlowException( 'Invalid content fixer', 'default' ); |
| 31 | } |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * @param AbstractRevision $revision |
| 37 | * @return string |
| 38 | */ |
| 39 | public function getContent( AbstractRevision $revision ) { |
| 40 | return $this->apply( |
| 41 | $revision->getContent( 'html' ), |
| 42 | $revision->getCollection()->getTitle() |
| 43 | ); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Applies all contained content fixers to the provided HTML content. |
| 48 | * The resulting content is then suitable for display to the end user. |
| 49 | * |
| 50 | * @param string $content Html |
| 51 | * @param Title $title |
| 52 | * @return string Html |
| 53 | */ |
| 54 | public function apply( $content, Title $title ) { |
| 55 | $dom = self::createDOM( $content ); |
| 56 | $this->applyToDom( $dom, $title ); |
| 57 | return Utils::getInnerHtml( $dom->getElementsByTagName( 'body' )->item( 0 ) ); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Applies all content fixers to the provided DOMDocument. |
| 62 | * Like apply(), but modifies a DOM in place rather than parsing and reserializing a string. |
| 63 | * |
| 64 | * @param DOMDocument $dom |
| 65 | * @param Title $title |
| 66 | */ |
| 67 | public function applyToDom( DOMDocument $dom, Title $title ) { |
| 68 | $xpath = new DOMXPath( $dom ); |
| 69 | foreach ( $this->contentFixers as $i => $contentFixer ) { |
| 70 | $found = $xpath->query( $contentFixer->getXPath() ); |
| 71 | if ( !$found ) { |
| 72 | wfDebugLog( 'Flow', __METHOD__ . ': Invalid XPath from ' . get_class( $contentFixer ) . ' of: ' . |
| 73 | $contentFixer->getXPath() ); |
| 74 | unset( $this->contentFixers[$i] ); |
| 75 | continue; |
| 76 | } |
| 77 | |
| 78 | foreach ( $found as $node ) { |
| 79 | $contentFixer->apply( $node, $title ); |
| 80 | } |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Creates a DOM with extra considerations for BC with |
| 86 | * previous parsoid content |
| 87 | * |
| 88 | * @param string $content HTML from parsoid |
| 89 | * @return DOMDocument |
| 90 | * @throws \Flow\Exception\WikitextException |
| 91 | */ |
| 92 | public static function createDOM( $content ) { |
| 93 | // The body tag is required otherwise <meta> tags at the top are |
| 94 | // magic'd into <head> rather than kept with the content. |
| 95 | if ( |
| 96 | substr( $content, 0, 5 ) !== '<body' |
| 97 | && substr( $content, 0, 9 ) !== '<!DOCTYPE' |
| 98 | // We might have set the html/head/base href in AbstractRevision#getContent, so |
| 99 | // make one more check before body wrapping the content. |
| 100 | && substr( $content, 0, 12 ) !== '<html><head>' |
| 101 | ) { |
| 102 | // BC: content currently comes from parsoid and is stored |
| 103 | // wrapped in <body> tags, but prior to I0d9659f we were |
| 104 | // storing only the contents and not the body tag itself. |
| 105 | $content = "<body>$content</body>"; |
| 106 | } |
| 107 | return Utils::createDOM( $content ); |
| 108 | } |
| 109 | } |