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add table support to markdown

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This commit is contained in:
zotlabs 2018-08-12 16:25:14 -07:00
parent 2d29095348
commit db1a546aba
1 changed files with 79 additions and 2 deletions
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81
include/markdown.php
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@ -5,7 +5,11 @@
*/
use Michelf\MarkdownExtra;
use League\HTMLToMarkdown\HtmlConverter;
use League\HTMLToMarkdown\Environment;
use League\HTMLToMarkdown\Converter\ConverterInterface;
use League\HTMLToMarkdown\ElementInterface;
require_once("include/oembed.php");
require_once("include/event.php");
@ -286,9 +290,12 @@ function bb_to_markdown($Text, $options = []) {
* @param string $html The HTML code to convert
* @return string Markdown representation of the given HTML text, empty on error
*/
function html2markdown($html) {
function html2markdown($html,$options = []) {
$markdown = '';
$converter = new HtmlConverter();
$environment = Environment::createDefaultEnvironment($options);
$environment->addConverter(new TableConverter());
$converter = new HtmlConverter($environment);
try {
$markdown = $converter->convert($html);
@ -298,3 +305,73 @@ function html2markdown($html) {
return $markdown;
}
// Tables are not an official part of the markdown specification.
// This interface was suggested as a workaround.
// author: Mark Hamstra
// https://github.com/Mark-H/Docs
class TableConverter implements ConverterInterface
{
/**
* @param ElementInterface $element
*
* @return string
*/
public function convert(ElementInterface $element)
{
switch ($element->getTagName()) {
case 'tr':
$line = [];
$i = 1;
foreach ($element->getChildren() as $td) {
$i++;
$v = $td->getValue();
$v = trim($v);
if ($i % 2 === 0 || $v !== '') {
$line[] = $v;
}
}
return '| ' . implode(' | ', $line) . " |\n";
case 'td':
case 'th':
return trim($element->getValue());
case 'tbody':
return trim($element->getValue());
case 'thead':
$headerLine = reset($element->getChildren())->getValue();
$headers = explode(' | ', trim(trim($headerLine, "\n"), '|'));
$hr = [];
foreach ($headers as $td) {
$length = strlen(trim($td)) + 2;
$hr[] = str_repeat('-', $length > 3 ? $length : 3);
}
$hr = '|' . implode('|', $hr) . '|';
return $headerLine . $hr . "\n";
case 'table':
$inner = $element->getValue();
if (strpos($inner, '-----') === false) {
$inner = explode("\n", $inner);
$single = explode(' | ', trim($inner[0], '|'));
$hr = [];
foreach ($single as $td) {
$length = strlen(trim($td)) + 2;
$hr[] = str_repeat('-', $length > 3 ? $length : 3);
}
$hr = '|' . implode('|', $hr) . '|';
array_splice($inner, 1, 0, $hr);
$inner = implode("\n", $inner);
}
return trim($inner) . "\n\n";
}
return $element->getValue();
}
/**
* @return string[]
*/
public function getSupportedTags()
{
return array('table', 'tr', 'thead', 'td', 'tbody');
}
}