129 lines
3.2 KiB
PHP
129 lines
3.2 KiB
PHP
<?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;
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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 Markdown 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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// 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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* @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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* @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 $escapeCharacters = [
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'\\', // backslash
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'`', // backtick
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'*', // asterisk
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'_', // underscore
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'{', '}', // curly braces
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'[', ']', // square brackets
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'(', ')', // parentheses
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'#', // hash mark
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'+', // plus sign
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'-', // minus sign (hyphen)
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'.', // dot
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'!', // exclamation mark
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'<', '>',
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];
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/**
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* @inheritDoc
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*/
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protected function prepare()
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{
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// reset references
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$this->references = [];
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}
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/**
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* 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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// 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, $i))) {
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break;
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}
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if ($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, --$i];
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}
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/**
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* @inheritdocs
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*
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* Parses a newline indicated by two spaces on the end of a markdown line.
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*/
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protected function renderText($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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