__NAMESPACE__ . '\\render_callback'
]);
}
add_action( 'init', 'register_simpletoc_block' );
/**
* Filter to add plugins to the TOC list for Rank Math plugin
*
* @param array TOC plugins.
*/
add_filter('rank_math/researches/toc_plugins', function ($toc_plugins) {
$toc_plugins['simpletoc/plugin.php'] = 'SimpleTOC';
return $toc_plugins;
});
add_filter( 'the_content', 'simpletoc_addIDstoContent', 1 );
function simpletoc_addIDstoContent( $content ) {
$blocks = parse_blocks( $content );
$blocks = addIDstoBlocks_recursive( $blocks );
$content = serialize_blocks( $blocks );
return $content;
}
function addIDstoBlocks_recursive( $blocks ) {
foreach ( $blocks as &$block ) {
if (isset($block['blockName']) && ( $block['blockName'] === 'core/heading' || $block['blockName'] === 'generateblocks/headline') && isset($block['innerHTML']) && isset($block['innerContent']) && isset($block['innerContent'][0]) ){
$block['innerHTML'] = addAnchorAttribute($block['innerHTML']);
$block['innerContent'][0] = addAnchorAttribute($block['innerContent'][0]);
} else if( isset($block['attrs']['ref']) ){
// search in reusable blocks (this is not finished because I ran out of ideas.)
// $reusable_block_id = $block['attrs']['ref'];
// $reusable_block_content = parse_blocks(get_post($reusable_block_id)->post_content);
} else if ( ! empty( $block['innerBlocks'] ) ) {
// search in groups
$block['innerBlocks'] = addIDstoBlocks_recursive( $block['innerBlocks'] );
}
}
return $blocks;
}
/**
* Render block output
*
*/
function render_callback( $attributes )
{
$is_backend = defined('REST_REQUEST') && true === REST_REQUEST && 'edit' === filter_input(INPUT_GET, 'context');
$alignclass = '';
if ( isset ($attributes['align']) ) {
$align = $attributes['align'];
$alignclass = 'align' . $align;
}
$className = '';
if ( isset( $attributes['className'] ) ) {
$className = strip_tags(htmlspecialchars($attributes['className'] ));
}
$pre_html = '';
$post_html = '';
if ( $className != '' ) {
$pre_html = '';
$post_html = '
';
}
$post = get_post();
if ( is_null($post) || is_null($post->post_content) ) {
$blocks = '';
} else {
$blocks = parse_blocks($post->post_content);
}
if ( empty($blocks) ) {
$html = '';
if( $is_backend == true ) {
if ($attributes['no_title'] == false) {
$html = '' . __('Table of Contents', 'simpletoc') . '
';
}
$html .= '' . __('No blocks found.', 'simpletoc') . ' ' . __('Save or update post first.', 'simpletoc') . '
';
}
return $html;
}
$headings = array_reverse(filter_headings_recursive($blocks));
// enrich headings with pages as a data-attribute
$headings = simpletoc_add_pagenumber($blocks, $headings);
$headings_clean = array_map('trim', $headings);
if ( empty( $headings_clean ) ) {
$html = '';
if( $is_backend == true ) {
if ($attributes['no_title'] == false) {
$html = '' . __('Table of Contents', 'simpletoc') . '
';
}
$html .= '' . __('No headings found.', 'simpletoc') . ' ' . __('Save or update post first.', 'simpletoc') . '
';
}
return $html;
}
$toclist = generateToc($headings_clean, $attributes);
if ( empty( $toclist ) ) {
$html = '';
if( $is_backend == true ) {
if ($attributes['no_title'] == false) {
$html = '' . __('Table of Contents', 'simpletoc') . '
';
}
$html .= '' . __('No headings found.', 'simpletoc') . ' ' . __('Check minimal and maximum level block settings.', 'simpletoc') . '
';
}
return $html;
}
$output = $pre_html . $toclist . $post_html;
return $output;
}
function simpletoc_add_pagenumber( $blocks, $headings ){
$pages = 1;
foreach ($blocks as $block => $innerBlock) {
// count nextpage blocks
if (isset($blocks[$block]['blockName']) && $blocks[$block]['blockName'] === 'core/nextpage' ){
$pages++;
}
if (isset($blocks[$block]['blockName']) && $blocks[$block]["blockName"] === 'core/heading') {
// make sure its a headline.
foreach ($headings as $heading => &$innerHeading){
if($innerHeading == $blocks[$block]["innerHTML"]){
$innerHeading = preg_replace("/( $innerBlock) {
if (is_array($innerBlock)) {
if (isset($innerBlock['attrs']['ref'])) {
// search in reusable blocks
$e_arr = parse_blocks(get_post($innerBlock['attrs']['ref'])->post_content);
$arr = array_merge(filter_headings_recursive($e_arr), $arr);
} else {
// search in groups
$arr = array_merge(filter_headings_recursive($innerBlock), $arr);
}
} else {
if (isset($blocks['blockName']) && ( $blocks['blockName'] === 'core/heading' ) && $innerBlock !== 'core/heading') {
// make sure its a headline.
if (preg_match("/(' . __('Support', 'simpletoc') . ''));
$links = array_merge($links, array('' . __('Donate', 'simpletoc') . ''));
$links = array_merge($links, array('' . __('Write a review', 'simpletoc') . ' ⭐️⭐️⭐️⭐️⭐️'));
}
return $links;
}
function addAnchorAttribute( $html )
{
// remove non-breaking space entites from input HTML
$html_wo_nbs = str_replace(" ", " ", $html);
// Thank you Nick Diego
if (!$html_wo_nbs) {
return $html;
}
libxml_use_internal_errors(TRUE);
$dom = new \DOMDocument();
@$dom->loadHTML($html_wo_nbs, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
// use xpath to select the Heading html tags.
$xpath = new \DOMXPath($dom);
$tags = $xpath->evaluate("//*[self::h1 or self::h2 or self::h3 or self::h4 or self::h5 or self::h6]");
// Loop through all the found tags
foreach ($tags as $tag) {
// if tag already has an attribute "id" defined, no need for creating a new one
if (!empty($tag->getAttribute('id'))) {continue;}
// Set id attribute
$heading_text = strip_tags($html);
$anchor = simpletoc_sanitize_string($heading_text);
$tag->setAttribute("id", $anchor);
}
// Save the HTML changes
$content = utf8_decode($dom->saveHTML($dom->documentElement));
return $content;
}
function generateToc( $headings, $attributes )
{
$list = '';
$html = '';
$min_depth = 6;
$listtype = 'ul';
$absolute_url = '';
$inital_depth = 6;
$link_class = '';
$styles = '';
$alignclass = '';
if ( isset ($attributes['align']) ) {
$align = $attributes['align'];
$alignclass = 'align' . $align;
}
if ($attributes['remove_indent'] == true) {
$styles = 'style="padding-left:0;list-style:none;"';
}
if ($attributes['add_smooth'] == true) {
$link_class = 'class="smooth-scroll"';
}
if ($attributes['use_ol'] == true) {
$listtype = 'ol';
}
if ($attributes['use_absolute_urls'] == true) {
$absolute_url = get_permalink();
}
foreach ($headings as $line => $headline) {
if ($min_depth > $headings[$line][2]) {
// search for lowest level
$min_depth = (int) $headings[$line][2];
$inital_depth = $min_depth;
}
}
/* If there is a custom min level, make sure it is the baseline. */
if ($attributes['min_level'] > $min_depth) {
$min_depth = $attributes['min_level'];
}
$itemcount = 0;
foreach ($headings as $line => $headline) {
$title = strip_tags($headline);
$page = '';
$dom = new \DOMDocument();
@$dom->loadHTML($headline, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$xpath = new \DOMXPath($dom);
$nodes = $xpath->query('//*/@data-page');
if ( isset($nodes[0] ) && $nodes[0]->nodeValue > 1) {
$page = $nodes[0]->nodeValue . '/';
$absolute_url = get_permalink();
}
$link = simpletoc_sanitize_string($title);
if (isset($nodes[0]) && !empty($nodes[0]->ownerElement->getAttribute('id'))) {
// if the node already has an attribute id, use that as anchor
$link = $nodes[0]->ownerElement->getAttribute('id');
}
$this_depth = (int) $headings[$line][2];
if (isset($headings[$line + 1][2])) {
$next_depth = (int) $headings[$line + 1][2];
} else {
$next_depth = '';
}
// skip this heading because a max depth is set.
if ($this_depth > $attributes['max_level'] or strpos($headline, 'class="simpletoc-hidden') > 0) {
goto closelist;
}
// skip this heading because a min depth is set.
if( $this_depth < $attributes['min_level'] ){
continue;
}
$itemcount++;
// start list
if ($this_depth == $min_depth) {
$list .= "\n";
} else {
// we are not as base level. Start opening levels until base is reached.
for ($min_depth; $min_depth < $this_depth; $min_depth++) {
$list .= "\n\t\t<" . $listtype . ">\n";
}
}
$list .= "" . $title . "";
closelist:
// close lists
// check if this is not the last heading
if ($line != count($headings) - 1) {
// do we need to close the door behind us?
if ($min_depth > $next_depth) {
// If yes, how many times?
for ($min_depth; $min_depth > $next_depth; $min_depth--) {
$list .= "\n";
}
}
if ($min_depth == $next_depth) {
$list .= "";
}
// last heading
} else {
for ($inital_depth; $inital_depth < $this_depth; $inital_depth++) {
$list .= "\n";
}
}
}
if ($attributes['no_title'] == false) {
$html = "" . __("Table of Contents", "simpletoc") . "
";
}
$html .= "<" . $listtype . " class=\"simpletoc-list\" " . $styles ." " . $alignclass .">\n" . $list . "";
if($itemcount < 1) {
$html = '';
}
return $html;
}