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<?php |
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/* |
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* This file is part of the HTMLUP package. |
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* |
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* (c) Jitendra Adhikari <[email protected]> |
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* <https://github.com/adhocore> |
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* |
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* Licensed under MIT license. |
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*/ |
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namespace Ahc; |
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/** |
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* HtmlUp - A **lightweight** && **fast** `markdown` to HTML Parser. |
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* |
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* Supports most of the markdown specs except deep nested elements. |
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* Check readme.md for the details of its features && limitations. |
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* |
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* @author adhocore | Jitendra Adhikari <[email protected]> |
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* @copyright (c) 2014 Jitendra Adhikari |
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*/ |
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class HtmlUp extends BlockElementParser |
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{ |
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/** |
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* Constructor. |
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* |
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* @param string $markdown |
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* @param int $indentWidth |
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*/ |
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public function __construct($markdown = \null, $indentWidth = 4) |
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{ |
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$this->scan($markdown, $indentWidth); |
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} |
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protected function scan($markdown, $indentWidth = 4) |
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{ |
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if ('' === \trim($markdown)) { |
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return; |
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} |
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$this->indentLen = $indentWidth == 2 ? 2 : 4; |
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$this->indentStr = $indentWidth == 2 ? ' ' : ' '; |
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// Normalize whitespaces |
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$markdown = \str_replace("\t", $this->indentStr, $markdown); |
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$markdown = \str_replace(["\r\n", "\r"], "\n", $markdown); |
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$this->lines = \array_merge([''], \explode("\n", $markdown), ['']); |
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} |
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public function __toString() |
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{ |
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return $this->parse(); |
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} |
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/** |
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* Parse markdown. |
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* |
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* @param string $markdown |
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* @param int $indentWidth |
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* |
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* @return string |
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*/ |
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public function parse($markdown = \null, $indentWidth = 4) |
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{ |
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if (\null !== $markdown) { |
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$this->reset(\true); |
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$this->scan($markdown, $indentWidth); |
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} |
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if (empty($this->lines)) { |
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return ''; |
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} |
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$this->parseBlockElements(); |
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return (new SpanElementParser)->parse($this->markup); |
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} |
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protected function init() |
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{ |
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list($this->prevLine, $this->trimmedPrevLine) = [$this->line, $this->trimmedLine]; |
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$this->line = $this->lines[$this->pointer]; |
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$this->trimmedLine = \trim($this->line); |
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$this->indent = \strlen($this->line) - \strlen(\ltrim($this->line)); |
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$this->nextLine = isset($this->lines[$this->pointer + 1]) |
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? $this->lines[$this->pointer + 1] |
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: ''; |
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$this->trimmedNextLine = \trim($this->nextLine); |
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$this->nextIndent = \strlen($this->nextLine) - \strlen(\ltrim($this->nextLine)); |
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} |
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protected function reset($all = \false) |
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{ |
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$except = $all ? [] : \array_flip(['lines', 'pointer', 'markup', 'indentStr', 'indentLen']); |
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// Reset all current values. |
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foreach (\get_class_vars(__CLASS__) as $prop => $value) { |
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isset($except[$prop]) || $this->{$prop} = $value; |
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} |
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} |
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protected function flush() |
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{ |
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if ('' !== $this->trimmedLine) { |
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return \false; |
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} |
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while (!empty($this->stackList)) { |
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$this->markup .= \array_pop($this->stackList); |
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} |
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while (!empty($this->stackBlock)) { |
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$this->markup .= \array_pop($this->stackBlock); |
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} |
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while (!empty($this->stackTable)) { |
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$this->markup .= \array_pop($this->stackTable); |
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} |
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$this->markup .= "\n"; |
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$this->reset(\false); |
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return \true; |
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} |
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protected function raw() |
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{ |
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if ($this->inHtml || \preg_match(static::RE_RAW, $this->trimmedLine)) { |
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$this->markup .= "\n$this->line"; |
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if (!$this->inHtml && empty($this->lines[$this->pointer - 1])) { |
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$this->inHtml = \true; |
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} |
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return \true; |
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} |
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} |
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protected function quote() |
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{ |
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if (\preg_match(static::RE_MD_QUOTE, $this->line, $quoteMatch)) { |
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$this->line = \substr($this->line, \strlen($quoteMatch[0])); |
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$this->trimmedLine = \trim($this->line); |
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if (!$this->inQuote || $this->quoteLevel < \strlen($quoteMatch[1])) { |
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$this->markup .= "\n<blockquote>"; |
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$this->stackBlock[] = "\n</blockquote>"; |
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$this->quoteLevel++; |
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} |
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return $this->inQuote = \true; |
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} |
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} |
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protected function paragraph() |
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{ |
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$this->markup .= $this->inPara ? "\n<br />" : "\n<p>"; |
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$this->markup .= $this->trimmedLine; |
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if (empty($this->trimmedNextLine)) { |
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$this->markup .= '</p>'; |
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$this->inPara = \false; |
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} else { |
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$this->inPara = \true; |
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} |
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} |
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} |
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