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1679 lines
40 KiB
1679 lines
40 KiB
<?php |
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# |
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# |
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# Parsedown |
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# http://parsedown.org |
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# |
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# (c) Emanuil Rusev |
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# http://erusev.com |
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# |
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# For the full license information, view the LICENSE file that was distributed |
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# with this source code. |
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# |
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# |
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class Parsedown |
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{ |
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# ~ |
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const version = '1.7.1'; |
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# ~ |
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function text($text) |
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{ |
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# make sure no definitions are set |
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$this->DefinitionData = array(); |
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# standardize line breaks |
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$text = str_replace(array("\r\n", "\r"), "\n", $text); |
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# remove surrounding line breaks |
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$text = trim($text, "\n"); |
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# split text into lines |
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$lines = explode("\n", $text); |
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# iterate through lines to identify blocks |
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$markup = $this->lines($lines); |
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# trim line breaks |
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$markup = trim($markup, "\n"); |
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return $markup; |
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} |
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# |
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# Setters |
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# |
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function setBreaksEnabled($breaksEnabled) |
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{ |
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$this->breaksEnabled = $breaksEnabled; |
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return $this; |
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} |
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protected $breaksEnabled; |
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function setMarkupEscaped($markupEscaped) |
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{ |
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$this->markupEscaped = $markupEscaped; |
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return $this; |
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} |
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protected $markupEscaped; |
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function setUrlsLinked($urlsLinked) |
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{ |
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$this->urlsLinked = $urlsLinked; |
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return $this; |
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} |
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protected $urlsLinked = true; |
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function setSafeMode($safeMode) |
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{ |
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$this->safeMode = (bool) $safeMode; |
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return $this; |
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} |
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protected $safeMode; |
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protected $safeLinksWhitelist = array( |
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'http://', |
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'https://', |
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'ftp://', |
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'ftps://', |
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'mailto:', |
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'data:image/png;base64,', |
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'data:image/gif;base64,', |
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'data:image/jpeg;base64,', |
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'irc:', |
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'ircs:', |
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'git:', |
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'ssh:', |
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'news:', |
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'steam:', |
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); |
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# |
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# Lines |
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# |
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protected $BlockTypes = array( |
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'#' => array('Header'), |
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'*' => array('Rule', 'List'), |
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'+' => array('List'), |
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'-' => array('SetextHeader', 'Table', 'Rule', 'List'), |
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'0' => array('List'), |
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'1' => array('List'), |
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'2' => array('List'), |
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'3' => array('List'), |
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'4' => array('List'), |
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'5' => array('List'), |
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'6' => array('List'), |
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'7' => array('List'), |
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'8' => array('List'), |
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'9' => array('List'), |
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':' => array('Table'), |
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'<' => array('Comment', 'Markup'), |
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'=' => array('SetextHeader'), |
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'>' => array('Quote'), |
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'[' => array('Reference'), |
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'_' => array('Rule'), |
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'`' => array('FencedCode'), |
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'|' => array('Table'), |
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'~' => array('FencedCode'), |
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); |
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# ~ |
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protected $unmarkedBlockTypes = array( |
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'Code', |
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); |
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# |
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# Blocks |
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# |
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protected function lines(array $lines) |
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{ |
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$CurrentBlock = null; |
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foreach ($lines as $line) |
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{ |
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if (chop($line) === '') |
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{ |
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if (isset($CurrentBlock)) |
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{ |
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$CurrentBlock['interrupted'] = true; |
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} |
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continue; |
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} |
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if (strpos($line, "\t") !== false) |
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{ |
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$parts = explode("\t", $line); |
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$line = $parts[0]; |
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unset($parts[0]); |
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foreach ($parts as $part) |
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{ |
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$shortage = 4 - mb_strlen($line, 'utf-8') % 4; |
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$line .= str_repeat(' ', $shortage); |
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$line .= $part; |
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} |
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} |
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$indent = 0; |
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while (isset($line[$indent]) and $line[$indent] === ' ') |
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{ |
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$indent ++; |
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} |
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$text = $indent > 0 ? substr($line, $indent) : $line; |
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# ~ |
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$Line = array('body' => $line, 'indent' => $indent, 'text' => $text); |
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# ~ |
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if (isset($CurrentBlock['continuable'])) |
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{ |
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$Block = $this->{'block'.$CurrentBlock['type'].'Continue'}($Line, $CurrentBlock); |
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if (isset($Block)) |
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{ |
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$CurrentBlock = $Block; |
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continue; |
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} |
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else |
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{ |
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if ($this->isBlockCompletable($CurrentBlock['type'])) |
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{ |
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$CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock); |
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} |
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} |
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} |
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# ~ |
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$marker = $text[0]; |
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# ~ |
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$blockTypes = $this->unmarkedBlockTypes; |
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if (isset($this->BlockTypes[$marker])) |
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{ |
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foreach ($this->BlockTypes[$marker] as $blockType) |
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{ |
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$blockTypes []= $blockType; |
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} |
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} |
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# |
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# ~ |
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foreach ($blockTypes as $blockType) |
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{ |
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$Block = $this->{'block'.$blockType}($Line, $CurrentBlock); |
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if (isset($Block)) |
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{ |
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$Block['type'] = $blockType; |
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if ( ! isset($Block['identified'])) |
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{ |
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$Blocks []= $CurrentBlock; |
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$Block['identified'] = true; |
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} |
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if ($this->isBlockContinuable($blockType)) |
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{ |
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$Block['continuable'] = true; |
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} |
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$CurrentBlock = $Block; |
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continue 2; |
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} |
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} |
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# ~ |
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if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted'])) |
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{ |
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$CurrentBlock['element']['text'] .= "\n".$text; |
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} |
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else |
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{ |
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$Blocks []= $CurrentBlock; |
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$CurrentBlock = $this->paragraph($Line); |
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$CurrentBlock['identified'] = true; |
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} |
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} |
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# ~ |
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if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type'])) |
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{ |
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$CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock); |
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} |
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# ~ |
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$Blocks []= $CurrentBlock; |
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unset($Blocks[0]); |
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# ~ |
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$markup = ''; |
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foreach ($Blocks as $Block) |
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{ |
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if (isset($Block['hidden'])) |
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{ |
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continue; |
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} |
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$markup .= "\n"; |
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$markup .= isset($Block['markup']) ? $Block['markup'] : $this->element($Block['element']); |
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} |
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$markup .= "\n"; |
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# ~ |
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return $markup; |
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} |
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protected function isBlockContinuable($Type) |
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{ |
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return method_exists($this, 'block'.$Type.'Continue'); |
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} |
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protected function isBlockCompletable($Type) |
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{ |
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return method_exists($this, 'block'.$Type.'Complete'); |
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} |
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# |
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# Code |
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protected function blockCode($Line, $Block = null) |
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{ |
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if (isset($Block) and ! isset($Block['type']) and ! isset($Block['interrupted'])) |
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{ |
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return; |
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} |
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if ($Line['indent'] >= 4) |
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{ |
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$text = substr($Line['body'], 4); |
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$Block = array( |
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'element' => array( |
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'name' => 'pre', |
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'handler' => 'element', |
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'text' => array( |
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'name' => 'code', |
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'text' => $text, |
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), |
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), |
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); |
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return $Block; |
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} |
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} |
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protected function blockCodeContinue($Line, $Block) |
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{ |
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if ($Line['indent'] >= 4) |
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{ |
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if (isset($Block['interrupted'])) |
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{ |
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$Block['element']['text']['text'] .= "\n"; |
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unset($Block['interrupted']); |
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} |
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$Block['element']['text']['text'] .= "\n"; |
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$text = substr($Line['body'], 4); |
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$Block['element']['text']['text'] .= $text; |
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return $Block; |
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} |
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} |
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protected function blockCodeComplete($Block) |
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{ |
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$text = $Block['element']['text']['text']; |
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$Block['element']['text']['text'] = $text; |
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return $Block; |
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} |
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# |
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# Comment |
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protected function blockComment($Line) |
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{ |
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if ($this->markupEscaped or $this->safeMode) |
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{ |
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return; |
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} |
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if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!') |
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{ |
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$Block = array( |
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'markup' => $Line['body'], |
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); |
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if (preg_match('/-->$/', $Line['text'])) |
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{ |
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$Block['closed'] = true; |
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} |
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return $Block; |
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} |
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} |
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protected function blockCommentContinue($Line, array $Block) |
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{ |
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if (isset($Block['closed'])) |
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{ |
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return; |
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} |
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$Block['markup'] .= "\n" . $Line['body']; |
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if (preg_match('/-->$/', $Line['text'])) |
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{ |
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$Block['closed'] = true; |
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} |
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return $Block; |
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} |
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# |
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# Fenced Code |
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protected function blockFencedCode($Line) |
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{ |
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if (preg_match('/^['.$Line['text'][0].']{3,}[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches)) |
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{ |
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$Element = array( |
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'name' => 'code', |
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'text' => '', |
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); |
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if (isset($matches[1])) |
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{ |
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$class = 'language-'.$matches[1]; |
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$Element['attributes'] = array( |
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'class' => $class, |
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); |
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} |
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$Block = array( |
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'char' => $Line['text'][0], |
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'element' => array( |
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'name' => 'pre', |
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'handler' => 'element', |
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'text' => $Element, |
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), |
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); |
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return $Block; |
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} |
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} |
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protected function blockFencedCodeContinue($Line, $Block) |
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{ |
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if (isset($Block['complete'])) |
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{ |
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return; |
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} |
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if (isset($Block['interrupted'])) |
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{ |
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$Block['element']['text']['text'] .= "\n"; |
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unset($Block['interrupted']); |
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} |
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if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text'])) |
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{ |
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$Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1); |
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$Block['complete'] = true; |
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return $Block; |
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} |
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$Block['element']['text']['text'] .= "\n".$Line['body']; |
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return $Block; |
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} |
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protected function blockFencedCodeComplete($Block) |
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{ |
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$text = $Block['element']['text']['text']; |
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$Block['element']['text']['text'] = $text; |
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return $Block; |
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} |
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# |
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# Header |
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protected function blockHeader($Line) |
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{ |
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if (isset($Line['text'][1])) |
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{ |
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$level = 1; |
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while (isset($Line['text'][$level]) and $Line['text'][$level] === '#') |
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{ |
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$level ++; |
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} |
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if ($level > 6) |
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{ |
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return; |
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} |
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$text = trim($Line['text'], '# '); |
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$Block = array( |
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'element' => array( |
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'name' => 'h' . min(6, $level), |
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'text' => $text, |
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'handler' => 'line', |
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), |
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); |
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return $Block; |
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} |
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} |
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# |
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# List |
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protected function blockList($Line) |
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{ |
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list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]'); |
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if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches)) |
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{ |
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$Block = array( |
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'indent' => $Line['indent'], |
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'pattern' => $pattern, |
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'element' => array( |
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'name' => $name, |
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'handler' => 'elements', |
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), |
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); |
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if($name === 'ol') |
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{ |
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$listStart = stristr($matches[0], '.', true); |
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if($listStart !== '1') |
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{ |
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$Block['element']['attributes'] = array('start' => $listStart); |
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} |
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} |
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$Block['li'] = array( |
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'name' => 'li', |
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'handler' => 'li', |
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'text' => array( |
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$matches[2], |
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), |
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); |
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$Block['element']['text'] []= & $Block['li']; |
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return $Block; |
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} |
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} |
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protected function blockListContinue($Line, array $Block) |
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{ |
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if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'(?:[ ]+(.*)|$)/', $Line['text'], $matches)) |
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{ |
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if (isset($Block['interrupted'])) |
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{ |
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$Block['li']['text'] []= ''; |
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$Block['loose'] = true; |
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unset($Block['interrupted']); |
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} |
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unset($Block['li']); |
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$text = isset($matches[1]) ? $matches[1] : ''; |
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$Block['li'] = array( |
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'name' => 'li', |
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'handler' => 'li', |
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'text' => array( |
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$text, |
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), |
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); |
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$Block['element']['text'] []= & $Block['li']; |
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return $Block; |
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} |
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if ($Line['text'][0] === '[' and $this->blockReference($Line)) |
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{ |
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return $Block; |
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} |
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if ( ! isset($Block['interrupted'])) |
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{ |
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$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); |
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$Block['li']['text'] []= $text; |
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return $Block; |
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} |
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if ($Line['indent'] > 0) |
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{ |
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$Block['li']['text'] []= ''; |
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$text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); |
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$Block['li']['text'] []= $text; |
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unset($Block['interrupted']); |
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return $Block; |
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} |
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} |
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protected function blockListComplete(array $Block) |
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{ |
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if (isset($Block['loose'])) |
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{ |
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foreach ($Block['element']['text'] as &$li) |
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{ |
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if (end($li['text']) !== '') |
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{ |
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$li['text'] []= ''; |
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} |
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} |
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} |
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return $Block; |
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} |
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# |
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# Quote |
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|
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protected function blockQuote($Line) |
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{ |
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if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) |
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{ |
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$Block = array( |
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'element' => array( |
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'name' => 'blockquote', |
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'handler' => 'lines', |
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'text' => (array) $matches[1], |
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), |
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); |
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return $Block; |
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} |
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} |
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protected function blockQuoteContinue($Line, array $Block) |
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{ |
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if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) |
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{ |
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if (isset($Block['interrupted'])) |
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{ |
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$Block['element']['text'] []= ''; |
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|
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unset($Block['interrupted']); |
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} |
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$Block['element']['text'] []= $matches[1]; |
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return $Block; |
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} |
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|
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if ( ! isset($Block['interrupted'])) |
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{ |
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$Block['element']['text'] []= $Line['text']; |
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|
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return $Block; |
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} |
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} |
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|
|
# |
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# Rule |
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|
|
protected function blockRule($Line) |
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{ |
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if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text'])) |
|
{ |
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$Block = array( |
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'element' => array( |
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'name' => 'hr' |
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), |
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); |
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|
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return $Block; |
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} |
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} |
|
|
|
# |
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# Setext |
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|
|
protected function blockSetextHeader($Line, array $Block = null) |
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{ |
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if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted'])) |
|
{ |
|
return; |
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} |
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|
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if (chop($Line['text'], $Line['text'][0]) === '') |
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{ |
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$Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2'; |
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return $Block; |
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} |
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} |
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|
|
# |
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# Markup |
|
|
|
protected function blockMarkup($Line) |
|
{ |
|
if ($this->markupEscaped or $this->safeMode) |
|
{ |
|
return; |
|
} |
|
|
|
if (preg_match('/^<(\w[\w-]*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches)) |
|
{ |
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$element = strtolower($matches[1]); |
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|
|
if (in_array($element, $this->textLevelElements)) |
|
{ |
|
return; |
|
} |
|
|
|
$Block = array( |
|
'name' => $matches[1], |
|
'depth' => 0, |
|
'markup' => $Line['text'], |
|
); |
|
|
|
$length = strlen($matches[0]); |
|
|
|
$remainder = substr($Line['text'], $length); |
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|
|
if (trim($remainder) === '') |
|
{ |
|
if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) |
|
{ |
|
$Block['closed'] = true; |
|
|
|
$Block['void'] = true; |
|
} |
|
} |
|
else |
|
{ |
|
if (isset($matches[2]) or in_array($matches[1], $this->voidElements)) |
|
{ |
|
return; |
|
} |
|
|
|
if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder)) |
|
{ |
|
$Block['closed'] = true; |
|
} |
|
} |
|
|
|
return $Block; |
|
} |
|
} |
|
|
|
protected function blockMarkupContinue($Line, array $Block) |
|
{ |
|
if (isset($Block['closed'])) |
|
{ |
|
return; |
|
} |
|
|
|
if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) # open |
|
{ |
|
$Block['depth'] ++; |
|
} |
|
|
|
if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) # close |
|
{ |
|
if ($Block['depth'] > 0) |
|
{ |
|
$Block['depth'] --; |
|
} |
|
else |
|
{ |
|
$Block['closed'] = true; |
|
} |
|
} |
|
|
|
if (isset($Block['interrupted'])) |
|
{ |
|
$Block['markup'] .= "\n"; |
|
|
|
unset($Block['interrupted']); |
|
} |
|
|
|
$Block['markup'] .= "\n".$Line['body']; |
|
|
|
return $Block; |
|
} |
|
|
|
# |
|
# Reference |
|
|
|
protected function blockReference($Line) |
|
{ |
|
if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches)) |
|
{ |
|
$id = strtolower($matches[1]); |
|
|
|
$Data = array( |
|
'url' => $matches[2], |
|
'title' => null, |
|
); |
|
|
|
if (isset($matches[3])) |
|
{ |
|
$Data['title'] = $matches[3]; |
|
} |
|
|
|
$this->DefinitionData['Reference'][$id] = $Data; |
|
|
|
$Block = array( |
|
'hidden' => true, |
|
); |
|
|
|
return $Block; |
|
} |
|
} |
|
|
|
# |
|
# Table |
|
|
|
protected function blockTable($Line, array $Block = null) |
|
{ |
|
if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted'])) |
|
{ |
|
return; |
|
} |
|
|
|
if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '') |
|
{ |
|
$alignments = array(); |
|
|
|
$divider = $Line['text']; |
|
|
|
$divider = trim($divider); |
|
$divider = trim($divider, '|'); |
|
|
|
$dividerCells = explode('|', $divider); |
|
|
|
foreach ($dividerCells as $dividerCell) |
|
{ |
|
$dividerCell = trim($dividerCell); |
|
|
|
if ($dividerCell === '') |
|
{ |
|
continue; |
|
} |
|
|
|
$alignment = null; |
|
|
|
if ($dividerCell[0] === ':') |
|
{ |
|
$alignment = 'left'; |
|
} |
|
|
|
if (substr($dividerCell, - 1) === ':') |
|
{ |
|
$alignment = $alignment === 'left' ? 'center' : 'right'; |
|
} |
|
|
|
$alignments []= $alignment; |
|
} |
|
|
|
# ~ |
|
|
|
$HeaderElements = array(); |
|
|
|
$header = $Block['element']['text']; |
|
|
|
$header = trim($header); |
|
$header = trim($header, '|'); |
|
|
|
$headerCells = explode('|', $header); |
|
|
|
foreach ($headerCells as $index => $headerCell) |
|
{ |
|
$headerCell = trim($headerCell); |
|
|
|
$HeaderElement = array( |
|
'name' => 'th', |
|
'text' => $headerCell, |
|
'handler' => 'line', |
|
); |
|
|
|
if (isset($alignments[$index])) |
|
{ |
|
$alignment = $alignments[$index]; |
|
|
|
$HeaderElement['attributes'] = array( |
|
'style' => 'text-align: '.$alignment.';', |
|
); |
|
} |
|
|
|
$HeaderElements []= $HeaderElement; |
|
} |
|
|
|
# ~ |
|
|
|
$Block = array( |
|
'alignments' => $alignments, |
|
'identified' => true, |
|
'element' => array( |
|
'name' => 'table', |
|
'handler' => 'elements', |
|
), |
|
); |
|
|
|
$Block['element']['text'] []= array( |
|
'name' => 'thead', |
|
'handler' => 'elements', |
|
); |
|
|
|
$Block['element']['text'] []= array( |
|
'name' => 'tbody', |
|
'handler' => 'elements', |
|
'text' => array(), |
|
); |
|
|
|
$Block['element']['text'][0]['text'] []= array( |
|
'name' => 'tr', |
|
'handler' => 'elements', |
|
'text' => $HeaderElements, |
|
); |
|
|
|
return $Block; |
|
} |
|
} |
|
|
|
protected function blockTableContinue($Line, array $Block) |
|
{ |
|
if (isset($Block['interrupted'])) |
|
{ |
|
return; |
|
} |
|
|
|
if ($Line['text'][0] === '|' or strpos($Line['text'], '|')) |
|
{ |
|
$Elements = array(); |
|
|
|
$row = $Line['text']; |
|
|
|
$row = trim($row); |
|
$row = trim($row, '|'); |
|
|
|
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches); |
|
|
|
foreach ($matches[0] as $index => $cell) |
|
{ |
|
$cell = trim($cell); |
|
|
|
$Element = array( |
|
'name' => 'td', |
|
'handler' => 'line', |
|
'text' => $cell, |
|
); |
|
|
|
if (isset($Block['alignments'][$index])) |
|
{ |
|
$Element['attributes'] = array( |
|
'style' => 'text-align: '.$Block['alignments'][$index].';', |
|
); |
|
} |
|
|
|
$Elements []= $Element; |
|
} |
|
|
|
$Element = array( |
|
'name' => 'tr', |
|
'handler' => 'elements', |
|
'text' => $Elements, |
|
); |
|
|
|
$Block['element']['text'][1]['text'] []= $Element; |
|
|
|
return $Block; |
|
} |
|
} |
|
|
|
# |
|
# ~ |
|
# |
|
|
|
protected function paragraph($Line) |
|
{ |
|
$Block = array( |
|
'element' => array( |
|
'name' => 'p', |
|
'text' => $Line['text'], |
|
'handler' => 'line', |
|
), |
|
); |
|
|
|
return $Block; |
|
} |
|
|
|
# |
|
# Inline Elements |
|
# |
|
|
|
protected $InlineTypes = array( |
|
'"' => array('SpecialCharacter'), |
|
'!' => array('Image'), |
|
'&' => array('SpecialCharacter'), |
|
'*' => array('Emphasis'), |
|
':' => array('Url'), |
|
'<' => array('UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'), |
|
'>' => array('SpecialCharacter'), |
|
'[' => array('Link'), |
|
'_' => array('Emphasis'), |
|
'`' => array('Code'), |
|
'~' => array('Strikethrough'), |
|
'\\' => array('EscapeSequence'), |
|
); |
|
|
|
# ~ |
|
|
|
protected $inlineMarkerList = '!"*_&[:<>`~\\'; |
|
|
|
# |
|
# ~ |
|
# |
|
|
|
public function line($text, $nonNestables=array()) |
|
{ |
|
$markup = ''; |
|
|
|
# $excerpt is based on the first occurrence of a marker |
|
|
|
while ($excerpt = strpbrk($text, $this->inlineMarkerList)) |
|
{ |
|
$marker = $excerpt[0]; |
|
|
|
$markerPosition = strpos($text, $marker); |
|
|
|
$Excerpt = array('text' => $excerpt, 'context' => $text); |
|
|
|
foreach ($this->InlineTypes[$marker] as $inlineType) |
|
{ |
|
# check to see if the current inline type is nestable in the current context |
|
|
|
if ( ! empty($nonNestables) and in_array($inlineType, $nonNestables)) |
|
{ |
|
continue; |
|
} |
|
|
|
$Inline = $this->{'inline'.$inlineType}($Excerpt); |
|
|
|
if ( ! isset($Inline)) |
|
{ |
|
continue; |
|
} |
|
|
|
# makes sure that the inline belongs to "our" marker |
|
|
|
if (isset($Inline['position']) and $Inline['position'] > $markerPosition) |
|
{ |
|
continue; |
|
} |
|
|
|
# sets a default inline position |
|
|
|
if ( ! isset($Inline['position'])) |
|
{ |
|
$Inline['position'] = $markerPosition; |
|
} |
|
|
|
# cause the new element to 'inherit' our non nestables |
|
|
|
foreach ($nonNestables as $non_nestable) |
|
{ |
|
$Inline['element']['nonNestables'][] = $non_nestable; |
|
} |
|
|
|
# the text that comes before the inline |
|
$unmarkedText = substr($text, 0, $Inline['position']); |
|
|
|
# compile the unmarked text |
|
$markup .= $this->unmarkedText($unmarkedText); |
|
|
|
# compile the inline |
|
$markup .= isset($Inline['markup']) ? $Inline['markup'] : $this->element($Inline['element']); |
|
|
|
# remove the examined text |
|
$text = substr($text, $Inline['position'] + $Inline['extent']); |
|
|
|
continue 2; |
|
} |
|
|
|
# the marker does not belong to an inline |
|
|
|
$unmarkedText = substr($text, 0, $markerPosition + 1); |
|
|
|
$markup .= $this->unmarkedText($unmarkedText); |
|
|
|
$text = substr($text, $markerPosition + 1); |
|
} |
|
|
|
$markup .= $this->unmarkedText($text); |
|
|
|
return $markup; |
|
} |
|
|
|
# |
|
# ~ |
|
# |
|
|
|
protected function inlineCode($Excerpt) |
|
{ |
|
$marker = $Excerpt['text'][0]; |
|
|
|
if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/s', $Excerpt['text'], $matches)) |
|
{ |
|
$text = $matches[2]; |
|
$text = preg_replace("/[ ]*\n/", ' ', $text); |
|
|
|
return array( |
|
'extent' => strlen($matches[0]), |
|
'element' => array( |
|
'name' => 'code', |
|
'text' => $text, |
|
), |
|
); |
|
} |
|
} |
|
|
|
protected function inlineEmailTag($Excerpt) |
|
{ |
|
if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<((mailto:)?\S+?@\S+?)>/i', $Excerpt['text'], $matches)) |
|
{ |
|
$url = $matches[1]; |
|
|
|
if ( ! isset($matches[2])) |
|
{ |
|
$url = 'mailto:' . $url; |
|
} |
|
|
|
return array( |
|
'extent' => strlen($matches[0]), |
|
'element' => array( |
|
'name' => 'a', |
|
'text' => $matches[1], |
|
'attributes' => array( |
|
'href' => $url, |
|
), |
|
), |
|
); |
|
} |
|
} |
|
|
|
protected function inlineEmphasis($Excerpt) |
|
{ |
|
if ( ! isset($Excerpt['text'][1])) |
|
{ |
|
return; |
|
} |
|
|
|
$marker = $Excerpt['text'][0]; |
|
|
|
if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches)) |
|
{ |
|
$emphasis = 'strong'; |
|
} |
|
elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches)) |
|
{ |
|
$emphasis = 'em'; |
|
} |
|
else |
|
{ |
|
return; |
|
} |
|
|
|
return array( |
|
'extent' => strlen($matches[0]), |
|
'element' => array( |
|
'name' => $emphasis, |
|
'handler' => 'line', |
|
'text' => $matches[1], |
|
), |
|
); |
|
} |
|
|
|
protected function inlineEscapeSequence($Excerpt) |
|
{ |
|
if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters)) |
|
{ |
|
return array( |
|
'markup' => $Excerpt['text'][1], |
|
'extent' => 2, |
|
); |
|
} |
|
} |
|
|
|
protected function inlineImage($Excerpt) |
|
{ |
|
if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '[') |
|
{ |
|
return; |
|
} |
|
|
|
$Excerpt['text']= substr($Excerpt['text'], 1); |
|
|
|
$Link = $this->inlineLink($Excerpt); |
|
|
|
if ($Link === null) |
|
{ |
|
return; |
|
} |
|
|
|
$Inline = array( |
|
'extent' => $Link['extent'] + 1, |
|
'element' => array( |
|
'name' => 'img', |
|
'attributes' => array( |
|
'src' => $Link['element']['attributes']['href'], |
|
'alt' => $Link['element']['text'], |
|
), |
|
), |
|
); |
|
|
|
$Inline['element']['attributes'] += $Link['element']['attributes']; |
|
|
|
unset($Inline['element']['attributes']['href']); |
|
|
|
return $Inline; |
|
} |
|
|
|
protected function inlineLink($Excerpt) |
|
{ |
|
$Element = array( |
|
'name' => 'a', |
|
'handler' => 'line', |
|
'nonNestables' => array('Url', 'Link'), |
|
'text' => null, |
|
'attributes' => array( |
|
'href' => null, |
|
'title' => null, |
|
), |
|
); |
|
|
|
$extent = 0; |
|
|
|
$remainder = $Excerpt['text']; |
|
|
|
if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches)) |
|
{ |
|
$Element['text'] = $matches[1]; |
|
|
|
$extent += strlen($matches[0]); |
|
|
|
$remainder = substr($remainder, $extent); |
|
} |
|
else |
|
{ |
|
return; |
|
} |
|
|
|
if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*"|\'[^\']*\'))?\s*[)]/', $remainder, $matches)) |
|
{ |
|
$Element['attributes']['href'] = $matches[1]; |
|
|
|
if (isset($matches[2])) |
|
{ |
|
$Element['attributes']['title'] = substr($matches[2], 1, - 1); |
|
} |
|
|
|
$extent += strlen($matches[0]); |
|
} |
|
else |
|
{ |
|
if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches)) |
|
{ |
|
$definition = strlen($matches[1]) ? $matches[1] : $Element['text']; |
|
$definition = strtolower($definition); |
|
|
|
$extent += strlen($matches[0]); |
|
} |
|
else |
|
{ |
|
$definition = strtolower($Element['text']); |
|
} |
|
|
|
if ( ! isset($this->DefinitionData['Reference'][$definition])) |
|
{ |
|
return; |
|
} |
|
|
|
$Definition = $this->DefinitionData['Reference'][$definition]; |
|
|
|
$Element['attributes']['href'] = $Definition['url']; |
|
$Element['attributes']['title'] = $Definition['title']; |
|
} |
|
|
|
return array( |
|
'extent' => $extent, |
|
'element' => $Element, |
|
); |
|
} |
|
|
|
protected function inlineMarkup($Excerpt) |
|
{ |
|
if ($this->markupEscaped or $this->safeMode or strpos($Excerpt['text'], '>') === false) |
|
{ |
|
return; |
|
} |
|
|
|
if ($Excerpt['text'][1] === '/' and preg_match('/^<\/\w[\w-]*[ ]*>/s', $Excerpt['text'], $matches)) |
|
{ |
|
return array( |
|
'markup' => $matches[0], |
|
'extent' => strlen($matches[0]), |
|
); |
|
} |
|
|
|
if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?[^-])*-->/s', $Excerpt['text'], $matches)) |
|
{ |
|
return array( |
|
'markup' => $matches[0], |
|
'extent' => strlen($matches[0]), |
|
); |
|
} |
|
|
|
if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w[\w-]*(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*\/?>/s', $Excerpt['text'], $matches)) |
|
{ |
|
return array( |
|
'markup' => $matches[0], |
|
'extent' => strlen($matches[0]), |
|
); |
|
} |
|
} |
|
|
|
protected function inlineSpecialCharacter($Excerpt) |
|
{ |
|
if ($Excerpt['text'][0] === '&' and ! preg_match('/^&#?\w+;/', $Excerpt['text'])) |
|
{ |
|
return array( |
|
'markup' => '&', |
|
'extent' => 1, |
|
); |
|
} |
|
|
|
$SpecialCharacter = array('>' => 'gt', '<' => 'lt', '"' => 'quot'); |
|
|
|
if (isset($SpecialCharacter[$Excerpt['text'][0]])) |
|
{ |
|
return array( |
|
'markup' => '&'.$SpecialCharacter[$Excerpt['text'][0]].';', |
|
'extent' => 1, |
|
); |
|
} |
|
} |
|
|
|
protected function inlineStrikethrough($Excerpt) |
|
{ |
|
if ( ! isset($Excerpt['text'][1])) |
|
{ |
|
return; |
|
} |
|
|
|
if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches)) |
|
{ |
|
return array( |
|
'extent' => strlen($matches[0]), |
|
'element' => array( |
|
'name' => 'del', |
|
'text' => $matches[1], |
|
'handler' => 'line', |
|
), |
|
); |
|
} |
|
} |
|
|
|
protected function inlineUrl($Excerpt) |
|
{ |
|
if ($this->urlsLinked !== true or ! isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/') |
|
{ |
|
return; |
|
} |
|
|
|
if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE)) |
|
{ |
|
$url = $matches[0][0]; |
|
|
|
$Inline = array( |
|
'extent' => strlen($matches[0][0]), |
|
'position' => $matches[0][1], |
|
'element' => array( |
|
'name' => 'a', |
|
'text' => $url, |
|
'attributes' => array( |
|
'href' => $url, |
|
), |
|
), |
|
); |
|
|
|
return $Inline; |
|
} |
|
} |
|
|
|
protected function inlineUrlTag($Excerpt) |
|
{ |
|
if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\w+:\/{2}[^ >]+)>/i', $Excerpt['text'], $matches)) |
|
{ |
|
$url = $matches[1]; |
|
|
|
return array( |
|
'extent' => strlen($matches[0]), |
|
'element' => array( |
|
'name' => 'a', |
|
'text' => $url, |
|
'attributes' => array( |
|
'href' => $url, |
|
), |
|
), |
|
); |
|
} |
|
} |
|
|
|
# ~ |
|
|
|
protected function unmarkedText($text) |
|
{ |
|
if ($this->breaksEnabled) |
|
{ |
|
$text = preg_replace('/[ ]*\n/', "<br />\n", $text); |
|
} |
|
else |
|
{ |
|
$text = preg_replace('/(?:[ ][ ]+|[ ]*\\\\)\n/', "<br />\n", $text); |
|
$text = str_replace(" \n", "\n", $text); |
|
} |
|
|
|
return $text; |
|
} |
|
|
|
# |
|
# Handlers |
|
# |
|
|
|
protected function element(array $Element) |
|
{ |
|
if ($this->safeMode) |
|
{ |
|
$Element = $this->sanitiseElement($Element); |
|
} |
|
|
|
$markup = '<'.$Element['name']; |
|
|
|
if (isset($Element['attributes'])) |
|
{ |
|
foreach ($Element['attributes'] as $name => $value) |
|
{ |
|
if ($value === null) |
|
{ |
|
continue; |
|
} |
|
|
|
$markup .= ' '.$name.'="'.self::escape($value).'"'; |
|
} |
|
} |
|
|
|
if (isset($Element['text'])) |
|
{ |
|
$markup .= '>'; |
|
|
|
if (!isset($Element['nonNestables'])) |
|
{ |
|
$Element['nonNestables'] = array(); |
|
} |
|
|
|
if (isset($Element['handler'])) |
|
{ |
|
$markup .= $this->{$Element['handler']}($Element['text'], $Element['nonNestables']); |
|
} |
|
else |
|
{ |
|
$markup .= self::escape($Element['text'], true); |
|
} |
|
|
|
$markup .= '</'.$Element['name'].'>'; |
|
} |
|
else |
|
{ |
|
$markup .= ' />'; |
|
} |
|
|
|
return $markup; |
|
} |
|
|
|
protected function elements(array $Elements) |
|
{ |
|
$markup = ''; |
|
|
|
foreach ($Elements as $Element) |
|
{ |
|
$markup .= "\n" . $this->element($Element); |
|
} |
|
|
|
$markup .= "\n"; |
|
|
|
return $markup; |
|
} |
|
|
|
# ~ |
|
|
|
protected function li($lines) |
|
{ |
|
$markup = $this->lines($lines); |
|
|
|
$trimmedMarkup = trim($markup); |
|
|
|
if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '<p>') |
|
{ |
|
$markup = $trimmedMarkup; |
|
$markup = substr($markup, 3); |
|
|
|
$position = strpos($markup, "</p>"); |
|
|
|
$markup = substr_replace($markup, '', $position, 4); |
|
} |
|
|
|
return $markup; |
|
} |
|
|
|
# |
|
# Deprecated Methods |
|
# |
|
|
|
function parse($text) |
|
{ |
|
$markup = $this->text($text); |
|
|
|
return $markup; |
|
} |
|
|
|
protected function sanitiseElement(array $Element) |
|
{ |
|
static $goodAttribute = '/^[a-zA-Z0-9][a-zA-Z0-9-_]*+$/'; |
|
static $safeUrlNameToAtt = array( |
|
'a' => 'href', |
|
'img' => 'src', |
|
); |
|
|
|
if (isset($safeUrlNameToAtt[$Element['name']])) |
|
{ |
|
$Element = $this->filterUnsafeUrlInAttribute($Element, $safeUrlNameToAtt[$Element['name']]); |
|
} |
|
|
|
if ( ! empty($Element['attributes'])) |
|
{ |
|
foreach ($Element['attributes'] as $att => $val) |
|
{ |
|
# filter out badly parsed attribute |
|
if ( ! preg_match($goodAttribute, $att)) |
|
{ |
|
unset($Element['attributes'][$att]); |
|
} |
|
# dump onevent attribute |
|
elseif (self::striAtStart($att, 'on')) |
|
{ |
|
unset($Element['attributes'][$att]); |
|
} |
|
} |
|
} |
|
|
|
return $Element; |
|
} |
|
|
|
protected function filterUnsafeUrlInAttribute(array $Element, $attribute) |
|
{ |
|
foreach ($this->safeLinksWhitelist as $scheme) |
|
{ |
|
if (self::striAtStart($Element['attributes'][$attribute], $scheme)) |
|
{ |
|
return $Element; |
|
} |
|
} |
|
|
|
$Element['attributes'][$attribute] = str_replace(':', '%3A', $Element['attributes'][$attribute]); |
|
|
|
return $Element; |
|
} |
|
|
|
# |
|
# Static Methods |
|
# |
|
|
|
protected static function escape($text, $allowQuotes = false) |
|
{ |
|
return htmlspecialchars($text, $allowQuotes ? ENT_NOQUOTES : ENT_QUOTES, 'UTF-8'); |
|
} |
|
|
|
protected static function striAtStart($string, $needle) |
|
{ |
|
$len = strlen($needle); |
|
|
|
if ($len > strlen($string)) |
|
{ |
|
return false; |
|
} |
|
else |
|
{ |
|
return strtolower(substr($string, 0, $len)) === strtolower($needle); |
|
} |
|
} |
|
|
|
static function instance($name = 'default') |
|
{ |
|
if (isset(self::$instances[$name])) |
|
{ |
|
return self::$instances[$name]; |
|
} |
|
|
|
$instance = new static(); |
|
|
|
self::$instances[$name] = $instance; |
|
|
|
return $instance; |
|
} |
|
|
|
private static $instances = array(); |
|
|
|
# |
|
# Fields |
|
# |
|
|
|
protected $DefinitionData; |
|
|
|
# |
|
# Read-Only |
|
|
|
protected $specialCharacters = array( |
|
'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|', |
|
); |
|
|
|
protected $StrongRegex = array( |
|
'*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s', |
|
'_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us', |
|
); |
|
|
|
protected $EmRegex = array( |
|
'*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s', |
|
'_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us', |
|
); |
|
|
|
protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?'; |
|
|
|
protected $voidElements = array( |
|
'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source', |
|
); |
|
|
|
protected $textLevelElements = array( |
|
'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont', |
|
'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing', |
|
'i', 'rp', 'del', 'code', 'strike', 'marquee', |
|
'q', 'rt', 'ins', 'font', 'strong', |
|
's', 'tt', 'kbd', 'mark', |
|
'u', 'xm', 'sub', 'nobr', |
|
'sup', 'ruby', |
|
'var', 'span', |
|
'wbr', 'time', |
|
); |
|
}
|
|
|