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<?php |
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/** |
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* @copyright Copyright (c) 2014 Carsten Brandt |
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* @license https://github.com/cebe/markdown/blob/master/LICENSE |
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* @link https://github.com/cebe/markdown#readme |
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*/ |
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namespace cebe\markdown\latex; |
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use cebe\markdown\block\FencedCodeTrait; |
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use cebe\markdown\block\TableTrait; |
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use cebe\markdown\inline\StrikeoutTrait; |
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use cebe\markdown\inline\UrlLinkTrait; |
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/** |
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* Markdown parser for github flavored markdown. |
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* |
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* - uses the [tabularx](http://www.ctan.org/pkg/tabularx) environment for tables. |
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* |
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* @author Carsten Brandt <[email protected]> |
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*/ |
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class GithubMarkdown extends Markdown |
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{ |
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// include block element parsing using traits |
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use TableTrait; |
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use FencedCodeTrait; |
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// include inline element parsing using traits |
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use StrikeoutTrait; |
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use UrlLinkTrait; |
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/** |
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* @var boolean whether to interpret newlines as `<br />`-tags. |
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* This feature is useful for comments where newlines are often meant to be real new lines. |
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*/ |
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public $enableNewlines = false; |
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/** |
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* @inheritDoc |
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*/ |
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protected $escapeCharacters = [ |
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// from Markdown |
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'\\', // backslash |
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'`', // backtick |
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'*', // asterisk |
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'_', // underscore |
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'{', '}', // curly braces |
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'[', ']', // square brackets |
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'(', ')', // parentheses |
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'#', // hash mark |
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'+', // plus sign |
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'-', // minus sign (hyphen) |
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'.', // dot |
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'!', // exclamation mark |
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'<', '>', |
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// added by GithubMarkdown |
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':', // colon |
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'|', // pipe |
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]; |
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/** |
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* Consume lines for a paragraph |
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* |
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* Allow headlines, lists and code to break paragraphs |
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*/ |
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protected function consumeParagraph($lines, $current) |
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{ |
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// consume until newline |
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$content = []; |
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for ($i = $current, $count = count($lines); $i < $count; $i++) { |
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$line = $lines[$i]; |
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if (!empty($line) && ltrim($line) !== '' && |
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!($line[0] === "\t" || $line[0] === " " && strncmp($line, ' ', 4) === 0) && |
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!$this->identifyHeadline($line, $lines, $i) && |
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!$this->identifyUl($line, $lines, $i) && |
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!$this->identifyOl($line, $lines, $i)) |
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{ |
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$content[] = $line; |
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} else { |
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break; |
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} |
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} |
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$block = [ |
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'paragraph', |
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'content' => $this->parseInline(implode("\n", $content)), |
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]; |
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return [$block, --$i]; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function renderCode($block) |
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{ |
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// make sure this is not replaced by the trait |
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return parent::renderCode($block); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function renderAutoUrl($block) |
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{ |
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return '\url{' . $this->escapeUrl($block[1]) . '}'; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function renderStrike($block) |
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{ |
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return '\sout{' . $this->renderAbsy($block[1]) . '}'; |
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} |
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/** |
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* @inheritdocs |
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* |
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* Parses a newline indicated by two spaces on the end of a markdown line. |
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*/ |
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protected function renderText($text) |
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{ |
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if ($this->enableNewlines) { |
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return preg_replace("/( \n|\n)/", "\\\\\\\\\n", $this->escapeLatex($text[1])); |
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} else { |
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return parent::renderText($text); |
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} |
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} |
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private $_tableCellHead = false; |
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private $_tds = 0; |
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protected function renderTable($block) |
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{ |
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$align = []; |
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foreach($block['cols'] as $col) { |
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if (empty($col)) { |
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$align[] = 'X'; |
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} else { |
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$align[] = $col[0]; |
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} |
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} |
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$align = implode('|', $align); |
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$content = ''; |
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$first = true; |
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$numThs = 0; |
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foreach($block['rows'] as $row) { |
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$this->_tableCellHead = $first; |
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$this->_tds = 0; |
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$content .= $this->renderAbsy($this->parseInline($row)); // TODO move this to the consume step |
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if ($first) { |
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$numThs = $this->_tds; |
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} else { |
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while ($this->_tds < $numThs) { |
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$content .= ' & '; |
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$this->_tds++; |
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} |
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} |
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$content .= "\\\\ \\hline\n"; |
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$first = false; |
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} |
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return "\n\\noindent\\begin{tabularx}{\\textwidth}{|$align|}\\hline\n$content\\end{tabularx}\n\n"; |
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} |
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/** |
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* @marker | |
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*/ |
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protected function parseTd($markdown) |
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{ |
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if (isset($this->context[1]) && $this->context[1] === 'table') { |
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$this->_tds++; |
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return [['tableSep'], 1]; |
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} |
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return [['text', $markdown[0]], 1]; |
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} |
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protected function renderTableSep($block) |
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{ |
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return '&'; |
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} |
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} |
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cebe /
markdown-latex
