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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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|
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namespace cebe\markdownparser; |
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|
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/** |
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* Markdown parser for the [initial markdown spec](http://daringfireball.net/projects/markdown/syntax). |
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* |
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* @author Carsten Brandt <mail@cebe.cc> |
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*/ |
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class MarkdownParser extends Parser |
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{ |
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// include block element parsing using traits |
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use block\CodeTrait; |
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use block\HeadlineTrait; |
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use block\HtmlTrait { |
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parseInlineHtml as private; |
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} |
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use block\ListTrait { |
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// Check Ul List before headline |
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identifyUl as protected identifyBUl; |
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consumeUl as protected consumeBUl; |
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} |
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use block\QuoteTrait; |
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use block\RuleTrait { |
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// Check Hr before checking lists |
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identifyHr as protected identifyAHr; |
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consumeHr as protected consumeAHr; |
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} |
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|
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// include inline element parsing using traits |
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use inline\CodeTrait; |
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use inline\EmphStrongTrait; |
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use inline\LinkTrait; |
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|
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/** |
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* @var boolean whether to format markup according to HTML5 spec. |
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* Defaults to `false` which means that markup is formatted as HTML4. |
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*/ |
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public $html5 = false; |
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|
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/** |
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* @var array these are "escapeable" characters. When using one of these prefixed with a |
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* backslash, the character will be outputted without the backslash and is not interpreted |
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* as markdown. |
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*/ |
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protected $escapeCharacters = [ |
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'\\', // backslash |
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'`', // backtick |
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'*', // asterisk |
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'_', // underscore |
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'{', '}', // curly braces |
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'[', ']', // square brackets |
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'(', ')', // parentheses |
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'#', // hash mark |
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'+', // plus sign |
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'-', // minus sign (hyphen) |
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'.', // dot |
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'!', // exclamation mark |
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'<', '>', |
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]; |
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|
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|
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/** |
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* @inheritDoc |
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*/ |
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protected function prepare() |
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{ |
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// reset references |
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$this->references = []; |
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} |
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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 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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|
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// a list may break a paragraph when it is inside of a list |
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if (isset($this->context[1]) && $this->context[1] === 'list' && !ctype_alpha($line[0]) && ( |
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$this->identifyUl($line, $lines, $i) || $this->identifyOl($line, $lines, $i))) { |
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break; |
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} |
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|
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if ($line === '' || ltrim($line) === '' || $this->identifyHeadline($line, $lines, $i)) { |
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break; |
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} elseif ($line[0] === "\t" || $line[0] === " " && strncmp($line, ' ', 4) === 0) { |
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// possible beginning of a code block |
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// but check for continued inline HTML |
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// e.g. <img src="file.jpg" |
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// alt="some alt aligned with src attribute" title="some text" /> |
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if (preg_match('~<\w+([^>]+)$~s', implode("\n", $content))) { |
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$content[] = $line; |
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} else { |
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break; |
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} |
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} else { |
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$content[] = $line; |
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} |
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} |
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$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, --$i]; |
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} |
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|
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|
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/** |
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* @inheritdocs |
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* |
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* Parses a newline indicated by two spaces on the end of a markdown line. |
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*/ |
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protected function renderText($text) |
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{ |
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return str_replace(" \n", $this->html5 ? "<br>\n" : "<br />\n", $text[1]); |
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} |
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} |
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|
