1694 lines
41 KiB
PHP
1694 lines
41 KiB
PHP
<?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 = '1.7.3';
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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($matches[1]))
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{
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/**
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* https://www.w3.org/TR/2011/WD-html5-20110525/elements.html#classes
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* Every HTML element may have a class attribute specified.
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* The attribute, if specified, must have a value that is a set
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* of space-separated tokens representing the various classes
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* that the element belongs to.
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* [...]
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* The space characters, for the purposes of this specification,
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* are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab),
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* U+000A LINE FEED (LF), U+000C FORM FEED (FF), and
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* U+000D CARRIAGE RETURN (CR).
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*/
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$language = substr($matches[1], 0, strcspn($matches[1], " \t\n\f\r"));
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$class = 'language-'.$language;
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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 $Block;
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}
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#
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# Quote
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|
|
|
protected function blockQuote($Line)
|
|
{
|
|
if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
|
|
{
|
|
$Block = array(
|
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'element' => array(
|
|
'name' => 'blockquote',
|
|
'handler' => 'lines',
|
|
'text' => (array) $matches[1],
|
|
),
|
|
);
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
protected function blockQuoteContinue($Line, array $Block)
|
|
{
|
|
if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
|
|
{
|
|
if (isset($Block['interrupted']))
|
|
{
|
|
$Block['element']['text'] []= '';
|
|
|
|
unset($Block['interrupted']);
|
|
}
|
|
|
|
$Block['element']['text'] []= $matches[1];
|
|
|
|
return $Block;
|
|
}
|
|
|
|
if ( ! isset($Block['interrupted']))
|
|
{
|
|
$Block['element']['text'] []= $Line['text'];
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
#
|
|
# Rule
|
|
|
|
protected function blockRule($Line)
|
|
{
|
|
if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text']))
|
|
{
|
|
$Block = array(
|
|
'element' => array(
|
|
'name' => 'hr'
|
|
),
|
|
);
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
#
|
|
# Setext
|
|
|
|
protected function blockSetextHeader($Line, array $Block = null)
|
|
{
|
|
if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (chop($Line['text'], $Line['text'][0]) === '')
|
|
{
|
|
$Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
|
|
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
#
|
|
# Markup
|
|
|
|
protected function blockMarkup($Line)
|
|
{
|
|
if ($this->markupEscaped or $this->safeMode)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (preg_match('/^<(\w[\w-]*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches))
|
|
{
|
|
$element = strtolower($matches[1]);
|
|
|
|
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'], $length);
|
|
|
|
if (trim($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',
|
|
);
|
|
}
|