WP_HTML_Tag_Processor::parse_next_attribute() │ private │ WP 6.2.0
Parses the next attribute.
Method of the class: WP_HTML_Tag_Processor{}
No Hooks.
Return
true|false
. Whether an attribute was found before the end of the document.
Usage
// private - for code of main (parent) class only $result = $this->parse_next_attribute();
Changelog
Since 6.2.0 | Introduced. |
WP_HTML_Tag_Processor::parse_next_attribute() WP HTML Tag Processor::parse next attribute code WP 6.6.2
private function parse_next_attribute() { // Skip whitespace and slashes. $this->bytes_already_parsed += strspn( $this->html, " \t\f\r\n/", $this->bytes_already_parsed ); if ( $this->bytes_already_parsed >= strlen( $this->html ) ) { $this->parser_state = self::STATE_INCOMPLETE_INPUT; return false; } /* * Treat the equal sign as a part of the attribute * name if it is the first encountered byte. * * @see https://html.spec.whatwg.org/multipage/parsing.html#before-attribute-name-state */ $name_length = '=' === $this->html[ $this->bytes_already_parsed ] ? 1 + strcspn( $this->html, "=/> \t\f\r\n", $this->bytes_already_parsed + 1 ) : strcspn( $this->html, "=/> \t\f\r\n", $this->bytes_already_parsed ); // No attribute, just tag closer. if ( 0 === $name_length || $this->bytes_already_parsed + $name_length >= strlen( $this->html ) ) { return false; } $attribute_start = $this->bytes_already_parsed; $attribute_name = substr( $this->html, $attribute_start, $name_length ); $this->bytes_already_parsed += $name_length; if ( $this->bytes_already_parsed >= strlen( $this->html ) ) { $this->parser_state = self::STATE_INCOMPLETE_INPUT; return false; } $this->skip_whitespace(); if ( $this->bytes_already_parsed >= strlen( $this->html ) ) { $this->parser_state = self::STATE_INCOMPLETE_INPUT; return false; } $has_value = '=' === $this->html[ $this->bytes_already_parsed ]; if ( $has_value ) { ++$this->bytes_already_parsed; $this->skip_whitespace(); if ( $this->bytes_already_parsed >= strlen( $this->html ) ) { $this->parser_state = self::STATE_INCOMPLETE_INPUT; return false; } switch ( $this->html[ $this->bytes_already_parsed ] ) { case "'": case '"': $quote = $this->html[ $this->bytes_already_parsed ]; $value_start = $this->bytes_already_parsed + 1; $value_length = strcspn( $this->html, $quote, $value_start ); $attribute_end = $value_start + $value_length + 1; $this->bytes_already_parsed = $attribute_end; break; default: $value_start = $this->bytes_already_parsed; $value_length = strcspn( $this->html, "> \t\f\r\n", $value_start ); $attribute_end = $value_start + $value_length; $this->bytes_already_parsed = $attribute_end; } } else { $value_start = $this->bytes_already_parsed; $value_length = 0; $attribute_end = $attribute_start + $name_length; } if ( $attribute_end >= strlen( $this->html ) ) { $this->parser_state = self::STATE_INCOMPLETE_INPUT; return false; } if ( $this->is_closing_tag ) { return true; } /* * > There must never be two or more attributes on * > the same start tag whose names are an ASCII * > case-insensitive match for each other. * - HTML 5 spec * * @see https://html.spec.whatwg.org/multipage/syntax.html#attributes-2:ascii-case-insensitive */ $comparable_name = strtolower( $attribute_name ); // If an attribute is listed many times, only use the first declaration and ignore the rest. if ( ! array_key_exists( $comparable_name, $this->attributes ) ) { $this->attributes[ $comparable_name ] = new WP_HTML_Attribute_Token( $attribute_name, $value_start, $value_length, $attribute_start, $attribute_end - $attribute_start, ! $has_value ); return true; } /* * Track the duplicate attributes so if we remove it, all disappear together. * * While `$this->duplicated_attributes` could always be stored as an `array()`, * which would simplify the logic here, storing a `null` and only allocating * an array when encountering duplicates avoids needless allocations in the * normative case of parsing tags with no duplicate attributes. */ $duplicate_span = new WP_HTML_Span( $attribute_start, $attribute_end - $attribute_start ); if ( null === $this->duplicate_attributes ) { $this->duplicate_attributes = array( $comparable_name => array( $duplicate_span ) ); } elseif ( ! array_key_exists( $comparable_name, $this->duplicate_attributes ) ) { $this->duplicate_attributes[ $comparable_name ] = array( $duplicate_span ); } else { $this->duplicate_attributes[ $comparable_name ][] = $duplicate_span; } return true; }