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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\RemexHtml\TreeBuilder; |
| 4 | |
| 5 | use Wikimedia\RemexHtml\HTMLData; |
| 6 | use Wikimedia\RemexHtml\Tokenizer\Attributes; |
| 7 | |
| 8 | /** |
| 9 | * The "initial" insertion mode |
| 10 | */ |
| 11 | class Initial extends InsertionMode { |
| 12 | /** |
| 13 | * The doctypes listed in the spec which are allowed without generating a |
| 14 | * parse error. A 2-d array where each row gives the doctype name, the |
| 15 | * public identifier and the system identifier. |
| 16 | * |
| 17 | * @var array |
| 18 | */ |
| 19 | private static $allowedDoctypes = [ |
| 20 | [ 'html', '-//W3C//DTD HTML 4.0//EN', null ], |
| 21 | [ 'html', '-//W3C//DTD HTML 4.0//EN', 'http://www.w3.org/TR/REC-html40/strict.dtd' ], |
| 22 | [ 'html', '-//W3C//DTD HTML 4.01//EN', null ], |
| 23 | [ 'html', '-//W3C//DTD HTML 4.01//EN', 'http://www.w3.org/TR/html4/strict.dtd' ], |
| 24 | [ 'html', '-//W3C//DTD XHTML 1.0 Strict//EN', |
| 25 | 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd' ], |
| 26 | [ 'html', '-//W3C//DTD XHTML 1.1//EN', 'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd' ] |
| 27 | ]; |
| 28 | |
| 29 | public function characters( $text, $start, $length, $sourceStart, $sourceLength ) { |
| 30 | // Ignore whitespace |
| 31 | [ $part1, $part2 ] = $this->splitInitialMatch( |
| 32 | true, "\t\n\f\r ", $text, $start, $length, $sourceStart, $sourceLength ); |
| 33 | [ $start, $length, $sourceStart, $sourceLength ] = $part2; |
| 34 | if ( !$length ) { |
| 35 | return; |
| 36 | } |
| 37 | if ( !$this->builder->isIframeSrcdoc ) { |
| 38 | $this->error( 'missing doctype', $sourceStart ); |
| 39 | $this->builder->quirks = TreeBuilder::QUIRKS; |
| 40 | } |
| 41 | $this->dispatcher->switchMode( Dispatcher::BEFORE_HTML ) |
| 42 | ->characters( $text, $start, $length, $sourceStart, $sourceLength ); |
| 43 | } |
| 44 | |
| 45 | public function startTag( $name, Attributes $attrs, $selfClose, $sourceStart, $sourceLength ) { |
| 46 | if ( !$this->builder->isIframeSrcdoc ) { |
| 47 | $this->error( 'missing doctype', $sourceStart ); |
| 48 | $this->builder->quirks = TreeBuilder::QUIRKS; |
| 49 | } |
| 50 | $this->dispatcher->switchMode( Dispatcher::BEFORE_HTML ) |
| 51 | ->startTag( $name, $attrs, $selfClose, $sourceStart, $sourceLength ); |
| 52 | } |
| 53 | |
| 54 | public function endTag( $name, $sourceStart, $sourceLength ) { |
| 55 | if ( !$this->builder->isIframeSrcdoc ) { |
| 56 | $this->error( 'missing doctype', $sourceStart ); |
| 57 | $this->builder->quirks = TreeBuilder::QUIRKS; |
| 58 | } |
| 59 | $this->dispatcher->switchMode( Dispatcher::BEFORE_HTML ) |
| 60 | ->endTag( $name, $sourceStart, $sourceLength ); |
| 61 | } |
| 62 | |
| 63 | public function doctype( $name, $public, $system, $quirks, $sourceStart, $sourceLength ) { |
| 64 | if ( ( $name !== 'html' || $public !== null |
| 65 | || ( $system !== null && $system !== 'about:legacy-compat' ) |
| 66 | ) |
| 67 | && !in_array( [ $name, $public, $system ], self::$allowedDoctypes, true ) |
| 68 | ) { |
| 69 | $this->error( 'invalid doctype', $sourceStart ); |
| 70 | } |
| 71 | |
| 72 | $quirks = $quirks ? TreeBuilder::QUIRKS : TreeBuilder::NO_QUIRKS; |
| 73 | |
| 74 | $quirksIfNoSystem = '~-//W3C//DTD HTML 4\.01 Frameset//|' . |
| 75 | '-//W3C//DTD HTML 4\.01 Transitional//~Ai'; |
| 76 | $limitedQuirks = '~-//W3C//DTD XHTML 1\.0 Frameset//|' . |
| 77 | '-//W3C//DTD XHTML 1\.0 Transitional//~Ai'; |
| 78 | |
| 79 | if ( $name !== 'html' |
| 80 | || $public === '-//W3O//DTD W3 HTML Strict 3.0//EN//' |
| 81 | || $public === '-/W3C/DTD HTML 4.0 Transitional/EN' |
| 82 | || $public === 'HTML' |
| 83 | || $system === 'http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd' |
| 84 | || ( $system === null && preg_match( $quirksIfNoSystem, $public ?? '' ) ) |
| 85 | || preg_match( HTMLData::$quirkyPrefixRegex, $public ?? '' ) |
| 86 | ) { |
| 87 | $quirks = TreeBuilder::QUIRKS; |
| 88 | } elseif ( !$this->builder->isIframeSrcdoc |
| 89 | && ( |
| 90 | preg_match( $limitedQuirks, $public ?? '' ) |
| 91 | || ( $system !== null && preg_match( $quirksIfNoSystem, $public ?? '' ) ) |
| 92 | ) |
| 93 | ) { |
| 94 | $quirks = TreeBuilder::LIMITED_QUIRKS; |
| 95 | } |
| 96 | |
| 97 | $name ??= ''; |
| 98 | $public ??= ''; |
| 99 | $system ??= ''; |
| 100 | $this->builder->doctype( $name, $public, $system, $quirks, |
| 101 | $sourceStart, $sourceLength ); |
| 102 | $this->dispatcher->switchMode( Dispatcher::BEFORE_HTML ); |
| 103 | } |
| 104 | |
| 105 | public function endDocument( $pos ) { |
| 106 | if ( !$this->builder->isIframeSrcdoc ) { |
| 107 | $this->error( 'missing doctype', $pos ); |
| 108 | $this->builder->quirks = TreeBuilder::QUIRKS; |
| 109 | } |
| 110 | $this->dispatcher->switchMode( Dispatcher::BEFORE_HTML ) |
| 111 | ->endDocument( $pos ); |
| 112 | } |
| 113 | } |