Edit File by line

<?php

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/**

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* Contact Form 7's class used for formatting HTML fragments.

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class WPCF7_HTMLFormatter {

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// HTML component types.

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const text = 0;

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const start_tag = 1;

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const end_tag = 2;

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const comment = 3;

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/**

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* Tag name reserved for a custom HTML element used as a block placeholder.

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const placeholder_block = 'placeholder:block';

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/**

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* Tag name reserved for a custom HTML element used as an inline placeholder.

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const placeholder_inline = 'placeholder:inline';

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/**

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* The void elements in HTML.

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* @link https://developer.mozilla.org/en-US/docs/Glossary/Void_element

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const void_elements = array(

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'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input',

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'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr',

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self::placeholder_block, self::placeholder_inline,

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);

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/**

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* HTML elements that can contain flow content.

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const p_parent_elements = array(

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'address', 'article', 'aside', 'blockquote', 'body', 'caption',

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'dd', 'details', 'dialog', 'div', 'dt', 'fieldset', 'figcaption',

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'figure', 'footer', 'form', 'header', 'li', 'main', 'nav',

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'section', 'td', 'th',

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);

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/**

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* HTML elements that can be neither the parent nor a child of

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* a paragraph element.

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const p_nonparent_elements = array(

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'colgroup', 'dl', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head',

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'hgroup', 'html', 'legend', 'menu', 'ol', 'pre', 'style', 'summary',

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'table', 'tbody', 'template', 'tfoot', 'thead', 'title', 'tr', 'ul',

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);

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/**

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* HTML elements in the phrasing content category, plus non-phrasing

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* content elements that can be grandchildren of a paragraph element.

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const p_child_elements = array(

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'a', 'abbr', 'area', 'audio', 'b', 'bdi', 'bdo', 'br', 'button',

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'canvas', 'cite', 'code', 'data', 'datalist', 'del', 'dfn',

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'em', 'embed', 'i', 'iframe', 'img', 'input', 'ins', 'kbd',

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'keygen', 'label', 'link', 'map', 'mark', 'meta',

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'meter', 'noscript', 'object', 'output', 'picture', 'progress',

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'q', 'ruby', 's', 'samp', 'script', 'select', 'slot', 'small',

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'span', 'strong', 'sub', 'sup', 'textarea',

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'time', 'u', 'var', 'video', 'wbr',

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'optgroup', 'option', 'rp', 'rt', // non-phrasing grandchildren

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self::placeholder_inline,

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);

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/**

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* HTML elements that can contain phrasing content.

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const br_parent_elements = array(

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'a', 'abbr', 'address', 'article', 'aside', 'audio', 'b', 'bdi',

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'bdo', 'blockquote', 'button', 'canvas', 'caption', 'cite', 'code',

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'data', 'datalist', 'dd', 'del', 'details', 'dfn', 'dialog', 'div',

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'dt', 'em', 'fieldset', 'figcaption', 'figure', 'footer', 'form',

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'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'i', 'ins', 'kbd',

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'label', 'legend', 'li', 'main', 'map', 'mark', 'meter', 'nav',

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'noscript', 'object', 'output', 'p', 'progress', 'q', 'rt',

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'ruby', 's', 'samp', 'section', 'slot', 'small', 'span', 'strong',

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'sub', 'summary', 'sup', 'td', 'th', 'time', 'u', 'var',

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'video',

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);

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// Properties.

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private $options = array();

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private $stacked_elements = array();

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private $output = '';

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/**

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* Constructor.

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public function __construct( $options = '' ) {

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$this->options = wp_parse_args( $options, array(

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'auto_br' => true,

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'auto_indent' => true,

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) );

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}

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/**

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* Separates the given text into chunks of HTML. Each chunk must be an

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* associative array that includes 'position', 'type', and 'content' keys.

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* @param string $input Text to be separated into chunks.

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* @return iterable Iterable of chunks.

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public function separate_into_chunks( $input ) {

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$input_bytelength = strlen( $input );

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$position = 0;

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while ( $position < $input_bytelength ) {

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$next_tag = preg_match(

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'/(?:|<(?:\/?)[a-z].*?>)/is',

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$input,

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$matches,

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PREG_OFFSET_CAPTURE,

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$position

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);

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if ( ! $next_tag ) {

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yield array(

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'position' => $position,

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'type' => self::text,

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'content' => substr( $input, $position ),

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);

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break;

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}

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$next_tag = $matches[0][0];

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$next_tag_position = $matches[0][1];

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if ( $position < $next_tag_position ) {

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yield array(

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'position' => $position,

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'type' => self::text,

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'content' => substr(

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$input,

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$position,

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$next_tag_position - $position

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);

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}

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if ( '<!' === substr( $next_tag, 0, 2 ) ) {

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$next_tag_type = self::comment;

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} elseif ( '</' === substr( $next_tag, 0, 2 ) ) {

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$next_tag_type = self::end_tag;

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} else {

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$next_tag_type = self::start_tag;

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}

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yield array(

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'position' => $next_tag_position,

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'type' => $next_tag_type,

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'content' => substr(

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$input,

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$next_tag_position,

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strlen( $next_tag )

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);

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$position = $next_tag_position + strlen( $next_tag );

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}

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}

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/**

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* Normalizes content in each chunk. This may change the type and position

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* of the chunk.

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* @param iterable $chunks The original chunks.

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* @return iterable Normalized chunks.

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public function pre_format( $chunks ) {

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$position = 0;

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foreach ( $chunks as $chunk ) {

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$chunk['position'] = $position;

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// Standardize newline characters to "\n".

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$chunk['content'] = str_replace(

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array( "\r\n", "\r" ), "\n", $chunk['content']

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);

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if ( $chunk['type'] === self::start_tag ) {

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list( $chunk['content'] ) =

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self::normalize_start_tag( $chunk['content'] );

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// Replace <br /> by a line break.

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if (

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$this->options['auto_br'] and

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preg_match( '/^<br\s*\/?>$/i', $chunk['content'] )

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) {

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$chunk['type'] = self::text;

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$chunk['content'] = "\n";

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}

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}

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yield $chunk;

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$position = self::calc_next_position( $chunk );

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}

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}

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/**

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* Concatenates neighboring text chunks to create a single chunk.

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* @param iterable $chunks The original chunks.

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* @return iterable Processed chunks.

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public function concatenate_texts( $chunks ) {

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$position = 0;

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$text_left = null;

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foreach ( $chunks as $chunk ) {

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$chunk['position'] = $position;

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if ( $chunk['type'] === self::text ) {

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if ( isset( $text_left ) ) {

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$text_left['content'] .= $chunk['content'];

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} else {

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$text_left = $chunk;

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}

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continue;

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}

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if ( isset( $text_left ) ) {

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yield $text_left;

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$chunk['position'] = self::calc_next_position( $text_left );

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$text_left = null;

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}

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yield $chunk;

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$position = self::calc_next_position( $chunk );

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}

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if ( isset( $text_left ) ) {

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yield $text_left;

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}

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}

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/**

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* Outputs formatted HTML based on the given chunks.

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* @param iterable $chunks The original chunks.

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* @return string Formatted HTML.

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public function format( $chunks ) {

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$chunks = $this->pre_format( $chunks );

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$chunks = $this->concatenate_texts( $chunks );

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$this->output = '';

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$this->stacked_elements = array();

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foreach ( $chunks as $chunk ) {

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if ( $chunk['type'] === self::text ) {

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$this->append_text( $chunk['content'] );

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}

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if ( $chunk['type'] === self::start_tag ) {

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$this->start_tag( $chunk['content'] );

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}

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if ( $chunk['type'] === self::end_tag ) {

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$this->end_tag( $chunk['content'] );

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}

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if ( $chunk['type'] === self::comment ) {

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$this->append_comment( $chunk['content'] );

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}

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}

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// Close all remaining tags.

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$this->close_all_tags();

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return $this->output;

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}

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/**

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* Appends a text node content to the output property.

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* @param string $content Text node content.

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public function append_text( $content ) {

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if ( $this->is_inside( array( 'pre', 'template' ) ) ) {

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$this->output .= $content;

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return;

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}

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if (

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empty( $this->stacked_elements ) or

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$this->has_parent( 'p' ) or

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$this->has_parent( self::p_parent_elements )

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) {

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// Close <p> if the content starts with multiple line breaks.

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if ( preg_match( '/^\s*\n\s*\n\s*/', $content ) ) {

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$this->end_tag( 'p' );

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}

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// Split up the contents into paragraphs, separated by double line breaks.

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$paragraphs = preg_split( '/\s*\n\s*\n\s*/', $content );

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$paragraphs = array_filter( $paragraphs, static function ( $paragraph ) {

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return '' !== trim( $paragraph );

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} );

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$paragraphs = array_values( $paragraphs );

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if ( $paragraphs ) {

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if ( $this->is_inside( 'p' ) ) {

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$paragraph = array_shift( $paragraphs );

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$paragraph = self::normalize_paragraph(

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$paragraph,

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$this->options['auto_br']

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);

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$this->output .= $paragraph;

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}

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foreach ( $paragraphs as $paragraph ) {

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$this->start_tag( 'p' );

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$paragraph = ltrim( $paragraph );

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$paragraph = self::normalize_paragraph(

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$paragraph,

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$this->options['auto_br']

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);

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$this->output .= $paragraph;

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}

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}

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// Close <p> if the content ends with multiple line breaks.

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if ( preg_match( '/\s*\n\s*\n\s*$/', $content ) ) {

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$this->end_tag( 'p' );

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}

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// Cases where the content is a single line break.

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if ( preg_match( '/^\s*\n\s*$/', $content ) ) {

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$auto_br = $this->options['auto_br'] && $this->is_inside( 'p' );

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$content = self::normalize_paragraph( $content, $auto_br );

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$this->output .= $content;

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}

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} else {

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$auto_br = $this->options['auto_br'] &&

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$this->has_parent( self::br_parent_elements );

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$content = self::normalize_paragraph( $content, $auto_br );

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$this->output .= $content;

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}

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}

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/**

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* Appends a start tag to the output property.

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* @param string $tag A start tag.

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public function start_tag( $tag ) {

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list( $tag, $tag_name ) = self::normalize_start_tag( $tag );

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if ( in_array( $tag_name, self::p_child_elements ) ) {

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if (

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! $this->is_inside( 'p' ) and

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! $this->is_inside( self::p_child_elements ) and

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! $this->has_parent( self::p_nonparent_elements )

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) {

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// Open <p> if it does not exist.

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$this->start_tag( 'p' );

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}

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} elseif (

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'p' === $tag_name or

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in_array( $tag_name, self::p_parent_elements ) or

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in_array( $tag_name, self::p_nonparent_elements )

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) {

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// Close <p> if it exists.

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$this->end_tag( 'p' );

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}

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if ( 'dd' === $tag_name or 'dt' === $tag_name ) {

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// Close <dd> and <dt> if closing tag is omitted.

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$this->end_tag( 'dd' );

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$this->end_tag( 'dt' );

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}

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if ( 'li' === $tag_name ) {

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// Close <li> if closing tag is omitted.

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$this->end_tag( 'li' );

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}

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if ( 'optgroup' === $tag_name ) {

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// Close <option> and <optgroup> if closing tag is omitted.

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$this->end_tag( 'option' );

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$this->end_tag( 'optgroup' );

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}

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if ( 'option' === $tag_name ) {

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// Close <option> if closing tag is omitted.

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$this->end_tag( 'option' );

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}

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if ( 'rp' === $tag_name or 'rt' === $tag_name ) {

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// Close <rp> and <rt> if closing tag is omitted.

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$this->end_tag( 'rp' );

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$this->end_tag( 'rt' );

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}

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if ( 'td' === $tag_name or 'th' === $tag_name ) {

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// Close <td> and <th> if closing tag is omitted.

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$this->end_tag( 'td' );

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$this->end_tag( 'th' );

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}

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if ( 'tr' === $tag_name ) {

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// Close <tr> if closing tag is omitted.

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$this->end_tag( 'tr' );

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}

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if ( 'tbody' === $tag_name or 'tfoot' === $tag_name ) {

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// Close <thead> if closing tag is omitted.

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$this->end_tag( 'thead' );

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}

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if ( 'tfoot' === $tag_name ) {

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// Close <tbody> if closing tag is omitted.

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$this->end_tag( 'tbody' );

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}

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if ( ! in_array( $tag_name, self::void_elements ) ) {

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array_unshift( $this->stacked_elements, $tag_name );

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}

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if ( ! in_array( $tag_name, self::p_child_elements ) ) {

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if ( '' !== $this->output ) {

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$this->output = rtrim( $this->output ) . "\n";

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}

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if ( $this->options['auto_indent'] ) {

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$this->output .= self::indent( count( $this->stacked_elements ) - 1 );

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}

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}

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$this->output .= $tag;

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}

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/**

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* Closes an element and its open descendants at a time.

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* @param string $tag An end tag.

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public function end_tag( $tag ) {

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if ( preg_match( '/<\/(.+?)(?:\s|>)/', $tag, $matches ) ) {

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$tag_name = strtolower( $matches[1] );

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} else {

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$tag_name = strtolower( $tag );

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}

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$stacked_elements = array_values( $this->stacked_elements );

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$tag_position = array_search( $tag_name, $stacked_elements );

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if ( false === $tag_position ) {

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return;

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}

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// Element groups that make up an indirect nesting structure.

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// Descendant can contain ancestors.

[483] Fix | Delete

static $nesting_families = array(

[484] Fix | Delete

array(

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'ancestors' => array( 'dl', ),

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'descendants' => array( 'dd', 'dt', ),

[487] Fix | Delete

[488] Fix | Delete

array(

[489] Fix | Delete

'ancestors' => array( 'ol', 'ul', 'menu', ),

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'descendants' => array( 'li', ),

[491] Fix | Delete

[492] Fix | Delete

array(

[493] Fix | Delete

'ancestors' => array( 'table', ),

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'descendants' => array( 'td', 'th', 'tr', 'thead', 'tbody', 'tfoot', ),

[495] Fix | Delete

[496] Fix | Delete

);

[497] Fix | Delete

[498] Fix | Delete

foreach ( $nesting_families as $family ) {

[499] Fix | Delete