Skips contents of script tags.
Source
/**
* Skips contents of generic rawtext elements.
*
* @since 6.3.2
*
* @see https://html.spec.whatwg.org/#generic-raw-text-element-parsing-algorithm
*
* @param string $tag_name The uppercase tag name which will close the RAWTEXT region.
* @return bool Whether an end to the RAWTEXT region was found before the end of the document.
*/
private function skip_rawtext( string $tag_name ): bool {
/*
* These two functions distinguish themselves on whether character references are
* decoded, and since functionality to read the inner markup isn't supported, it's
* not necessary to implement these two functions separately.
*/
return $this->skip_rcdata( $tag_name );
}
/**
* Skips contents of RCDATA elements, namely title and textarea tags.
*
* @since 6.2.0
*
* @see https://html.spec.whatwg.org/multipage/parsing.html#rcdata-state
*
* @param string $tag_name The uppercase tag name which will close the RCDATA region.
* @return bool Whether an end to the RCDATA region was found before the end of the document.
*/
private function skip_rcdata( string $tag_name ): bool {
$html = $this->html;
$doc_length = strlen( $html );
$tag_length = strlen( $tag_name );
$at = $this->bytes_already_parsed;
while ( false !== $at && $at < $doc_length ) {
$at = strpos( $this->html, '</', $at );
$this->tag_name_starts_at = $at;
// Fail if there is no possible tag closer.
if ( false === $at || ( $at + $tag_length ) >= $doc_length ) {
return false;
}
$at += 2;
/*
* Find a case-insensitive match to the tag name.
*
* Because tag names are limited to US-ASCII there is no
* need to perform any kind of Unicode normalization when
* comparing; any character which could be impacted by such
* normalization could not be part of a tag name.
*/
for ( $i = 0; $i < $tag_length; $i++ ) {
$tag_char = $tag_name[ $i ];
$html_char = $html[ $at + $i ];
if ( $html_char !== $tag_char && strtoupper( $html_char ) !== $tag_char ) {
$at += $i;
continue 2;
}
}
$at += $tag_length;
$this->bytes_already_parsed = $at;
if ( $at >= strlen( $html ) ) {
return false;
}
/*
* Ensure that the tag name terminates to avoid matching on
* substrings of a longer tag name. For example, the sequence
* "</textarearug" should not match for "</textarea" even
* though "textarea" is found within the text.
*/
$c = $html[ $at ];
if ( ' ' !== $c && "\t" !== $c && "\r" !== $c && "\n" !== $c && '/' !== $c && '>' !== $c ) {
continue;
}
while ( $this->parse_next_attribute() ) {
continue;
}
$at = $this->bytes_already_parsed;
if ( $at >= strlen( $this->html ) ) {
return false;
}
if ( '>' === $html[ $at ] ) {
$this->bytes_already_parsed = $at + 1;
return true;
}
if ( $at + 1 >= strlen( $this->html ) ) {
return false;
}
if ( '/' === $html[ $at ] && '>' === $html[ $at + 1 ] ) {
$this->bytes_already_parsed = $at + 2;
return true;
}
}
return false;
}
/**
* Skips contents of script tags.
*
* @since 6.2.0
*
* @return bool Whether the script tag was closed before the end of the document.
*/
private function skip_script_data(): bool {
$state = 'unescaped';
$html = $this->html;
$doc_length = strlen( $html );
$at = $this->bytes_already_parsed;
while ( false !== $at && $at < $doc_length ) {
$at += strcspn( $html, '-<', $at );
/*
* For all script states a "-->" transitions
* back into the normal unescaped script mode,
* even if that's the current state.
*/
if (
Changelog
Version | Description |
---|---|
6.2.0 | Introduced. |
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