261 lines
11 KiB
PHP
261 lines
11 KiB
PHP
<?php
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function wpautop( $pee, $br = true ) {
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$pre_tags = array();
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if ( trim( $pee ) === '' ) {
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return '';
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}
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// Just to make things a little easier, pad the end.
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$pee = $pee . "\n";
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/*
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* Pre tags shouldn't be touched by autop.
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* Replace pre tags with placeholders and bring them back after autop.
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*/
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if ( strpos( $pee, '<pre' ) !== false ) {
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$pee_parts = explode( '</pre>', $pee );
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$last_pee = array_pop( $pee_parts );
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$pee = '';
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$i = 0;
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foreach ( $pee_parts as $pee_part ) {
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$start = strpos( $pee_part, '<pre' );
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// Malformed html?
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if ( $start === false ) {
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$pee .= $pee_part;
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continue;
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}
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$name = "<pre wp-pre-tag-$i></pre>";
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$pre_tags[ $name ] = substr( $pee_part, $start ) . '</pre>';
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$pee .= substr( $pee_part, 0, $start ) . $name;
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$i++;
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}
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$pee .= $last_pee;
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}
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// Change multiple <br>s into two line breaks, which will turn into paragraphs.
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$pee = preg_replace( '|<br\s*/?>\s*<br\s*/?>|', "\n\n", $pee );
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$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
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// Add a double line break above block-level opening tags.
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$pee = preg_replace( '!(<' . $allblocks . '[\s/>])!', "\n\n$1", $pee );
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// Add a double line break below block-level closing tags.
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$pee = preg_replace( '!(</' . $allblocks . '>)!', "$1\n\n", $pee );
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// Add a double line break after hr tags, which are self closing.
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$pee = preg_replace( '!(<hr\s*?/?>)!', "$1\n\n", $pee );
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// Standardize newline characters to "\n".
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$pee = str_replace( array( "\r\n", "\r" ), "\n", $pee );
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// Find newlines in all elements and add placeholders.
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$pee = wp_replace_in_html_tags( $pee, array( "\n" => ' <!-- wpnl --> ' ) );
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// Collapse line breaks before and after <option> elements so they don't get autop'd.
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if ( strpos( $pee, '<option' ) !== false ) {
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$pee = preg_replace( '|\s*<option|', '<option', $pee );
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$pee = preg_replace( '|</option>\s*|', '</option>', $pee );
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}
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/*
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* Collapse line breaks inside <object> elements, before <param> and <embed> elements
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* so they don't get autop'd.
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*/
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if ( strpos( $pee, '</object>' ) !== false ) {
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$pee = preg_replace( '|(<object[^>]*>)\s*|', '$1', $pee );
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$pee = preg_replace( '|\s*</object>|', '</object>', $pee );
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$pee = preg_replace( '%\s*(</?(?:param|embed)[^>]*>)\s*%', '$1', $pee );
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}
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/*
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* Collapse line breaks inside <audio> and <video> elements,
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* before and after <source> and <track> elements.
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*/
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if ( strpos( $pee, '<source' ) !== false || strpos( $pee, '<track' ) !== false ) {
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$pee = preg_replace( '%([<\[](?:audio|video)[^>\]]*[>\]])\s*%', '$1', $pee );
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$pee = preg_replace( '%\s*([<\[]/(?:audio|video)[>\]])%', '$1', $pee );
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$pee = preg_replace( '%\s*(<(?:source|track)[^>]*>)\s*%', '$1', $pee );
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}
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// Collapse line breaks before and after <figcaption> elements.
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if ( strpos( $pee, '<figcaption' ) !== false ) {
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$pee = preg_replace( '|\s*(<figcaption[^>]*>)|', '$1', $pee );
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$pee = preg_replace( '|</figcaption>\s*|', '</figcaption>', $pee );
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}
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// Remove more than two contiguous line breaks.
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$pee = preg_replace( "/\n\n+/", "\n\n", $pee );
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// Split up the contents into an array of strings, separated by double line breaks.
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$pees = preg_split( '/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY );
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// Reset $pee prior to rebuilding.
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$pee = '';
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// Rebuild the content as a string, wrapping every bit with a <p>.
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foreach ( $pees as $tinkle ) {
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$pee .= '<p>' . trim( $tinkle, "\n" ) . "</p>\n";
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}
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// Under certain strange conditions it could create a P of entirely whitespace.
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$pee = preg_replace( '|<p>\s*</p>|', '', $pee );
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// Add a closing <p> inside <div>, <address>, or <form> tag if missing.
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$pee = preg_replace( '!<p>([^<]+)</(div|address|form)>!', '<p>$1</p></$2>', $pee );
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// If an opening or closing block element tag is wrapped in a <p>, unwrap it.
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$pee = preg_replace( '!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', '$1', $pee );
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// In some cases <li> may get wrapped in <p>, fix them.
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$pee = preg_replace( '|<p>(<li.+?)</p>|', '$1', $pee );
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// If a <blockquote> is wrapped with a <p>, move it inside the <blockquote>.
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$pee = preg_replace( '|<p><blockquote([^>]*)>|i', '<blockquote$1><p>', $pee );
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$pee = str_replace( '</blockquote></p>', '</p></blockquote>', $pee );
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// If an opening or closing block element tag is preceded by an opening <p> tag, remove it.
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$pee = preg_replace( '!<p>\s*(</?' . $allblocks . '[^>]*>)!', '$1', $pee );
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// If an opening or closing block element tag is followed by a closing <p> tag, remove it.
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$pee = preg_replace( '!(</?' . $allblocks . '[^>]*>)\s*</p>!', '$1', $pee );
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// Optionally insert line breaks.
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if ( $br ) {
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// Replace newlines that shouldn't be touched with a placeholder.
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$pee = preg_replace_callback( '/<(script|style|svg).*?<\/\\1>/s', '_autop_newline_preservation_helper', $pee );
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// Normalize <br>
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$pee = str_replace( array( '<br>', '<br/>' ), '<br />', $pee );
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// Replace any new line characters that aren't preceded by a <br /> with a <br />.
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$pee = preg_replace( '|(?<!<br />)\s*\n|', "<br />\n", $pee );
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// Replace newline placeholders with newlines.
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$pee = str_replace( '<WPPreserveNewline />', "\n", $pee );
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}
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// If a <br /> tag is after an opening or closing block tag, remove it.
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$pee = preg_replace( '!(</?' . $allblocks . '[^>]*>)\s*<br />!', '$1', $pee );
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// If a <br /> tag is before a subset of opening or closing block tags, remove it.
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$pee = preg_replace( '!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee );
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$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
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// Replace placeholder <pre> tags with their original content.
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if ( ! empty( $pre_tags ) ) {
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$pee = str_replace( array_keys( $pre_tags ), array_values( $pre_tags ), $pee );
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}
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// Restore newlines in all elements.
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if ( false !== strpos( $pee, '<!-- wpnl -->' ) ) {
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$pee = str_replace( array( ' <!-- wpnl --> ', '<!-- wpnl -->' ), "\n", $pee );
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}
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return $pee;
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}
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function _autop_newline_preservation_helper( $matches ) {
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return str_replace( "\n", '<WPPreserveNewline />', $matches[0] );
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}
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function wp_replace_in_html_tags( $haystack, $replace_pairs ) {
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// Find all elements.
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$textarr = wp_html_split( $haystack );
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$changed = false;
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// Optimize when searching for one item.
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if ( 1 === count( $replace_pairs ) ) {
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// Extract $needle and $replace.
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foreach ( $replace_pairs as $needle => $replace ) {
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}
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// Loop through delimiters (elements) only.
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for ( $i = 1, $c = count( $textarr ); $i < $c; $i += 2 ) {
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if ( false !== strpos( $textarr[ $i ], $needle ) ) {
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$textarr[ $i ] = str_replace( $needle, $replace, $textarr[ $i ] );
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$changed = true;
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}
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}
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} else {
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// Extract all $needles.
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$needles = array_keys( $replace_pairs );
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// Loop through delimiters (elements) only.
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for ( $i = 1, $c = count( $textarr ); $i < $c; $i += 2 ) {
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foreach ( $needles as $needle ) {
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if ( false !== strpos( $textarr[ $i ], $needle ) ) {
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$textarr[ $i ] = strtr( $textarr[ $i ], $replace_pairs );
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$changed = true;
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// After one strtr() break out of the foreach loop and look at next element.
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break;
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}
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}
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}
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}
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if ( $changed ) {
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$haystack = implode( $textarr );
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}
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return $haystack;
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}
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function wp_html_split( $input ) {
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return preg_split( get_html_split_regex(), $input, -1, PREG_SPLIT_DELIM_CAPTURE );
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}
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function get_html_split_regex() {
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static $regex;
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if ( ! isset( $regex ) ) {
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// phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
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$comments =
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'!' // Start of comment, after the <.
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. '(?:' // Unroll the loop: Consume everything until --> is found.
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. '-(?!->)' // Dash not followed by end of comment.
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. '[^\-]*+' // Consume non-dashes.
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. ')*+' // Loop possessively.
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. '(?:-->)?'; // End of comment. If not found, match all input.
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$cdata =
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'!\[CDATA\[' // Start of comment, after the <.
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. '[^\]]*+' // Consume non-].
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. '(?:' // Unroll the loop: Consume everything until ]]> is found.
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. '](?!]>)' // One ] not followed by end of comment.
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. '[^\]]*+' // Consume non-].
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. ')*+' // Loop possessively.
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. '(?:]]>)?'; // End of comment. If not found, match all input.
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$escaped =
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'(?=' // Is the element escaped?
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. '!--'
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. '|'
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. '!\[CDATA\['
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. ')'
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. '(?(?=!-)' // If yes, which type?
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. $comments
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. '|'
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. $cdata
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. ')';
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$regex =
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'/(' // Capture the entire match.
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. '<' // Find start of element.
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. '(?' // Conditional expression follows.
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. $escaped // Find end of escaped element.
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. '|' // ... else ...
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. '[^>]*>?' // Find end of normal element.
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. ')'
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. ')/';
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// phpcs:enable
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}
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return $regex;
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} |