207 lines
4.5 KiB
PHP
207 lines
4.5 KiB
PHP
<?php
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/**
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* @copyright Copyright 2014 Carsten Brandt, 2024 Daniel Pimley
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* @license https://github.com/xenocrat/chyrp-markdown/blob/master/LICENSE
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* @link https://github.com/xenocrat/chyrp-markdown#readme
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*/
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namespace xenocrat\markdown\block;
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/**
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* Adds table blocks.
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*/
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trait TableTrait
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{
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/**
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* Identify a line as the beginning of a table block.
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*/
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protected function identifyTable($line, $lines, $current): bool
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{
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return (
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strpos($line, '|') !== false && isset($lines[$current + 1])
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&& preg_match(
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'/^\s*\|?(\s*:?-[\-\s]*:?\s*\|?)*\s*$/',
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$lines[$current + 1]
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)
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&& strpos($lines[$current + 1], '|') !== false
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// Attempt to detect a mismatch in the
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// number of header and delimiter columns.
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&& (
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preg_match_all('/(?<!^|\\\\)\|(?!$)/', $line)
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===
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preg_match_all('/(?<!^|\\\\)\|(?!$)/', $lines[$current + 1])
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)
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);
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}
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/**
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* Consume lines for a table.
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*/
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protected function consumeTable($lines, $current): array
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{
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$block = [
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'table',
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'cols' => [],
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'rows' => [],
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];
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// Consume until blank line...
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for ($i = $current, $count = count($lines); $i < $count; $i++) {
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$line = trim($lines[$i]);
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// Extract alignment from second line.
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if ($i == $current + 1) {
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$cols = explode('|', trim($line, ' |'));
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foreach($cols as $col) {
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$col = trim($col);
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if (empty($col)) {
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$block['cols'][] = '';
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continue;
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}
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$l = ($col[0] === ':');
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$r = str_ends_with($col, ':');
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if ($l && $r) {
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$block['cols'][] = 'center';
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} elseif ($l) {
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$block['cols'][] = 'left';
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} elseif ($r) {
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$block['cols'][] = 'right';
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} else {
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$block['cols'][] = '';
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}
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}
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continue;
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}
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if (
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// Blank line breaks the table.
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$line === ''
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|| (
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// Once iteration is beyond the header and delimiter rows,
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// detecting a non-paragraph block marker breaks the table.
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$i > $current + 1
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&& $this->detectLineType($lines, $i) !== 'paragraph'
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)
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) {
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break;
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}
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if ($line[0] === '|') {
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$line = substr($line, 1);
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}
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if (
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str_ends_with($line, '|')
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&& (
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!str_ends_with($line, '\\|')
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|| str_ends_with($line, '\\\\|')
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)
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) {
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$line = substr($line, 0, -1);
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}
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array_unshift($this->context, 'table');
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$row = $this->parseInline(trim($line, ' '));
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array_shift($this->context);
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$r = count($block['rows']);
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$c = 0;
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$block['rows'][] = [];
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foreach ($row as $absy) {
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if (!isset($block['rows'][$r][$c])) {
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$block['rows'][$r][] = [];
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}
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if ($absy[0] === 'tableBoundary') {
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$c++;
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} else {
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$block['rows'][$r][$c][] = $absy;
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}
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}
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}
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return [$block, --$i];
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}
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/**
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* Render a table block.
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*/
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protected function renderTable($block): string
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{
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$head = '';
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$body = '';
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$cols = $block['cols'];
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$colCount = count($block['cols']);
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$first = true;
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foreach($block['rows'] as $row) {
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$cellTag = $first ? 'th' : 'td';
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$tds = '';
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foreach ($row as $c => $cell) {
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if ($c < $colCount) {
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$align = empty($cols[$c]) ?
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'' :
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' align="' . $cols[$c] . '"' ;
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$tds .= "<$cellTag$align>"
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. trim($this->renderAbsy($cell))
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. "</$cellTag>\n";
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}
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}
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for ($i = count($row); $i < $colCount; $i++) {
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$tds .= "<$cellTag></$cellTag$align>\n";
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}
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if ($first) {
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$head .= "<tr>\n$tds</tr>\n";
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} else {
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$body .= "<tr>\n$tds</tr>\n";
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}
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$first = false;
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}
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return $this->composeTable($head, $body);
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}
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/**
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* This method composes a table from parsed body and head HTML.
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*
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* @param string $head - Table head HTML.
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* @param string $body - Table body HTML.
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* @return string - The complete table HTML.
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* @since 1.2.0
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*/
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protected function composeTable($head, $body): string
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{
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$table = "<table>\n";
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if ($head !== '') {
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$table .= "<thead>\n$head</thead>\n";
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}
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if ($body !== '') {
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$table .= "<tbody>\n$body</tbody>\n";
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}
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$table .= "</table>\n";
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return $table;
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}
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protected function parseTdMarkers(): array
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{
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return array('|');
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}
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/**
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* Parses table data cells.
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*
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* @marker |
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*/
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protected function parseTd($markdown): array
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{
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if (isset($this->context[1]) && $this->context[1] === 'table') {
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return [
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['tableBoundary'],
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isset($markdown[1]) && $markdown[1] === ' ' ? 2 : 1
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];
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}
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return [['text', $markdown[0]], 1];
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}
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abstract protected function parseInline($text);
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abstract protected function renderAbsy($absy);
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abstract protected function detectLineType($lines, $current);
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}
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