*/
class GithubMarkdown extends Markdown
{
// include block element parsing using traits
use block\TableTrait;
use block\FencedCodeTrait;
// include inline element parsing using traits
use inline\StrikeoutTrait;
use inline\UrlLinkTrait;
/**
* @var boolean whether to interpret newlines as `
`-tags.
* This feature is useful for comments where newlines are often meant to be real new lines.
*/
public $enableNewlines = false;
/**
* @inheritDoc
*/
protected $escapeCharacters = [
// from Markdown
'\\', // backslash
'`', // backtick
'*', // asterisk
'_', // underscore
'{', '}', // curly braces
'[', ']', // square brackets
'(', ')', // parentheses
'#', // hash mark
'+', // plus sign
'-', // minus sign (hyphen)
'.', // dot
'!', // exclamation mark
'<', '>',
// added by GithubMarkdown
':', // colon
'|', // pipe
];
/**
* Consume lines for a paragraph
*
* Allow headlines, lists and code to break paragraphs
*/
protected function consumeParagraph($lines, $current)
{
// consume until newline
$content = [];
for ($i = $current, $count = count($lines); $i < $count; $i++) {
$line = $lines[$i];
if ($line === ''
|| ltrim($line) === ''
|| !ctype_alpha($line[0]) && (
$this->identifyQuote($line, $lines, $i) ||
$this->identifyFencedCode($line, $lines, $i) ||
$this->identifyUl($line, $lines, $i) ||
$this->identifyOl($line, $lines, $i) ||
$this->identifyHr($line, $lines, $i)
)
|| $this->identifyHeadline($line, $lines, $i))
{
break;
} elseif ($this->identifyCode($line, $lines, $i)) {
// possible beginning of a code block
// but check for continued inline HTML
// e.g. 
if (preg_match('~<\w+([^>]+)$~s', implode("\n", $content))) {
$content[] = $line;
} else {
break;
}
} else {
$content[] = $line;
}
}
$block = [
'paragraph',
'content' => $this->parseInline(implode("\n", $content)),
];
return [$block, --$i];
}
/**
* @inheritdocs
*
* Parses a newline indicated by two spaces on the end of a markdown line.
*/
protected function renderText($text)
{
if ($this->enableNewlines) {
$br = $this->html5 ? "
\n" : "
\n";
return strtr($text[1], [" \n" => $br, "\n" => $br]);
} else {
return parent::renderText($text);
}
}
}