875 lines
38 KiB
PHP
875 lines
38 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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# Sourced from: https://github.com/erusev/parsedown (MIT License)
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# Required by plugin-update-checker (Puc/v5p6) via vendor/Parsedown.php
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#
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class Parsedown
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{
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# ~
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const version = '1.8.0';
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# ~
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function text($text)
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{
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$Elements = $this->textElements($text);
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# convert to markup
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$markup = $this->elements($Elements);
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# trim line breaks
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$markup = trim($markup, "\n");
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return $markup;
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}
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protected function textElements($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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return $this->linesElements($lines);
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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 $safeMode;
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function setStrictMode($strictMode)
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{
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$this->strictMode = (bool) $strictMode;
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return $this;
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}
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protected $strictMode;
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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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'tel:',
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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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protected $unmarkedBlockTypes = array('Code');
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protected function lines(array $lines)
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{
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return $this->elements($this->linesElements($lines));
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}
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protected function linesElements(array $lines)
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{
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$Elements = array();
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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'] = (isset($CurrentBlock['interrupted'])
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? $CurrentBlock['interrupted'] + 1 : 1
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);
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}
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continue;
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}
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while (($beforeTab = strstr($line, "\t", true)) !== false)
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{
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$shortage = 4 - mb_strlen($beforeTab, 'utf-8') % 4;
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$line = $beforeTab . str_repeat(' ', $shortage) . substr($line, strlen($beforeTab) + 1);
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}
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$indent = strspn($line, ' ');
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$text = $indent > 0 ? substr($line, $indent) : $line;
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$Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
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if (isset($CurrentBlock['continuable']))
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{
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$methodName = 'block' . $CurrentBlock['type'] . 'Continue';
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$Block = $this->$methodName($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($CurrentBlock['type']))
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{
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$methodName = 'block' . $CurrentBlock['type'] . 'Complete';
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$CurrentBlock = $this->$methodName($CurrentBlock);
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}
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}
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}
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$marker = $text[0];
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$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[] = $blockType;
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}
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}
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foreach ($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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if (isset($CurrentBlock))
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{
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$Elements[] = $this->extractElement($CurrentBlock);
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}
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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 = $Block;
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continue 2;
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}
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}
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if (isset($CurrentBlock) and $CurrentBlock['type'] === 'Paragraph')
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{
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$Block = $this->paragraphContinue($Line, $CurrentBlock);
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}
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if (isset($Block))
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{
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$CurrentBlock = $Block;
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}
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else
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{
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if (isset($CurrentBlock))
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{
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$Elements[] = $this->extractElement($CurrentBlock);
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}
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$CurrentBlock = $this->paragraph($Line);
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$CurrentBlock['identified'] = true;
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}
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}
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if (isset($CurrentBlock['continuable']) and $this->isBlockCompletable($CurrentBlock['type']))
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{
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$methodName = 'block' . $CurrentBlock['type'] . 'Complete';
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$CurrentBlock = $this->$methodName($CurrentBlock);
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}
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if (isset($CurrentBlock))
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{
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$Elements[] = $this->extractElement($CurrentBlock);
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}
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return $Elements;
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}
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protected function extractElement(array $Component)
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{
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if (!isset($Component['element']))
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{
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if (isset($Component['markup']))
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{
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$Component['element'] = array('rawHtml' => $Component['markup']);
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}
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elseif (isset($Component['hidden']))
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{
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$Component['element'] = array();
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}
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}
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return $Component['element'];
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}
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protected function isBlockContinuable($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' . $Type . 'Complete');
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}
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protected function blockCode($Line, $Block = null)
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{
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if (isset($Block) and $Block['type'] === 'Paragraph' and !isset($Block['interrupted'])) { return; }
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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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return array('element' => array('name' => 'pre', 'element' => array('name' => 'code', 'text' => $text)));
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}
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}
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protected function blockCodeContinue($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'])) { $Block['element']['element']['text'] .= str_repeat("\n", $Block['interrupted']); unset($Block['interrupted']); }
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$Block['element']['element']['text'] .= "\n" . substr($Line['body'], 4);
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return $Block;
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}
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}
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protected function blockCodeComplete($Block) { return $Block; }
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protected function blockComment($Line)
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{
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if ($this->markupEscaped or $this->safeMode) { return; }
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if (strpos($Line['text'], '<!--') === 0)
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{
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$Block = array('element' => array('rawHtml' => $Line['body'], 'autobreak' => true));
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if (strpos($Line['text'], '-->') !== false) { $Block['closed'] = true; }
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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'])) { return; }
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$Block['element']['rawHtml'] .= "\n" . $Line['body'];
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if (strpos($Line['text'], '-->') !== false) { $Block['closed'] = true; }
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return $Block;
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}
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protected function blockFencedCode($Line)
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{
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$marker = $Line['text'][0];
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$openerLength = strspn($Line['text'], $marker);
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if ($openerLength < 3) { return; }
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$infostring = trim(substr($Line['text'], $openerLength), "\t ");
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if (strpos($infostring, '`') !== false) { return; }
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$Element = array('name' => 'code', 'text' => '');
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if ($infostring !== '')
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{
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$language = substr($infostring, 0, strcspn($infostring, " \t\n\f\r"));
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$Element['attributes'] = array('class' => "language-$language");
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}
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return array('char' => $marker, 'openerLength' => $openerLength, 'element' => array('name' => 'pre', 'element' => $Element));
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}
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protected function blockFencedCodeContinue($Line, $Block)
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{
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if (isset($Block['complete'])) { return; }
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if (isset($Block['interrupted'])) { $Block['element']['element']['text'] .= str_repeat("\n", $Block['interrupted']); unset($Block['interrupted']); }
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if (($len = strspn($Line['text'], $Block['char'])) >= $Block['openerLength'] and chop(substr($Line['text'], $len), ' ') === '')
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{
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$Block['element']['element']['text'] = substr($Block['element']['element']['text'], 1);
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$Block['complete'] = true;
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return $Block;
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}
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$Block['element']['element']['text'] .= "\n" . $Line['body'];
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return $Block;
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}
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protected function blockFencedCodeComplete($Block) { return $Block; }
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protected function blockHeader($Line)
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{
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$level = strspn($Line['text'], '#');
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if ($level > 6) { return; }
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$text = trim($Line['text'], '#');
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if ($this->strictMode and isset($text[0]) and $text[0] !== ' ') { return; }
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$text = trim($text, ' ');
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return array('element' => array('name' => 'h' . $level, 'handler' => array('function' => 'lineElements', 'argument' => $text, 'destination' => 'elements')));
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}
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protected function blockList($Line, ?array $CurrentBlock = null)
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{
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list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]{1,9}+[.\)]');
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if (preg_match('/^('.$pattern.'([ ]++|$))(.*+)/', $Line['text'], $matches))
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{
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$contentIndent = strlen($matches[2]);
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if ($contentIndent >= 5) { $contentIndent--; $matches[1] = substr($matches[1], 0, -$contentIndent); $matches[3] = str_repeat(' ', $contentIndent) . $matches[3]; }
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elseif ($contentIndent === 0) { $matches[1] .= ' '; }
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$markerWithoutWhitespace = strstr($matches[1], ' ', true);
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$Block = array('indent' => $Line['indent'], 'pattern' => $pattern, 'data' => array('type' => $name, 'marker' => $matches[1], 'markerType' => ($name === 'ul' ? $markerWithoutWhitespace : substr($markerWithoutWhitespace, -1))), 'element' => array('name' => $name, 'elements' => array()));
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$Block['data']['markerTypeRegex'] = preg_quote($Block['data']['markerType'], '/');
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if ($name === 'ol')
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{
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$listStart = ltrim(strstr($matches[1], $Block['data']['markerType'], true), '0') ?: '0';
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if ($listStart !== '1') { if (isset($CurrentBlock) and $CurrentBlock['type'] === 'Paragraph' and !isset($CurrentBlock['interrupted'])) { return; } $Block['element']['attributes'] = array('start' => $listStart); }
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}
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$Block['li'] = array('name' => 'li', 'handler' => array('function' => 'li', 'argument' => !empty($matches[3]) ? array($matches[3]) : array(), 'destination' => 'elements'));
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$Block['element']['elements'][] = &$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 $Block)
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{
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if (isset($Block['interrupted']) and empty($Block['li']['handler']['argument'])) { return null; }
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$requiredIndent = ($Block['indent'] + strlen($Block['data']['marker']));
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if ($Line['indent'] < $requiredIndent and (($Block['data']['type'] === 'ol' and preg_match('/^[0-9]++'.$Block['data']['markerTypeRegex'].'(?:[ ]++(.*)|$)/', $Line['text'], $matches)) or ($Block['data']['type'] === 'ul' and preg_match('/^'.$Block['data']['markerTypeRegex'].'(?:[ ]++(.*)|$)/', $Line['text'], $matches))))
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{
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if (isset($Block['interrupted'])) { $Block['li']['handler']['argument'][] = ''; $Block['loose'] = true; unset($Block['interrupted']); }
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unset($Block['li']);
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$text = isset($matches[1]) ? $matches[1] : '';
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$Block['indent'] = $Line['indent'];
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$Block['li'] = array('name' => 'li', 'handler' => array('function' => 'li', 'argument' => array($text), 'destination' => 'elements'));
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$Block['element']['elements'][] = &$Block['li'];
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return $Block;
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}
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elseif ($Line['indent'] < $requiredIndent and $this->blockList($Line)) { return null; }
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if ($Line['text'][0] === '[' and $this->blockReference($Line)) { return $Block; }
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if ($Line['indent'] >= $requiredIndent)
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{
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if (isset($Block['interrupted'])) { $Block['li']['handler']['argument'][] = ''; $Block['loose'] = true; unset($Block['interrupted']); }
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$Block['li']['handler']['argument'][] = substr($Line['body'], $requiredIndent);
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return $Block;
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}
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if (!isset($Block['interrupted'])) { $Block['li']['handler']['argument'][] = preg_replace('/^[ ]{0,'.$requiredIndent.'}+/', '', $Line['body']); return $Block; }
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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'])) { foreach ($Block['element']['elements'] as &$li) { if (end($li['handler']['argument']) !== '') { $li['handler']['argument'][] = ''; } } }
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return $Block;
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}
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protected function blockQuote($Line)
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{
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if (preg_match('/^>[ ]?+(.*+)/', $Line['text'], $matches))
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{
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return array('element' => array('name' => 'blockquote', 'handler' => array('function' => 'linesElements', 'argument' => (array) $matches[1], 'destination' => 'elements')));
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}
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}
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protected function blockQuoteContinue($Line, array $Block)
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{
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if (isset($Block['interrupted'])) { return; }
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if ($Line['text'][0] === '>' and preg_match('/^>[ ]?+(.*+)/', $Line['text'], $matches)) { $Block['element']['handler']['argument'][] = $matches[1]; return $Block; }
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if (!isset($Block['interrupted'])) { $Block['element']['handler']['argument'][] = $Line['text']; return $Block; }
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}
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protected function blockRule($Line)
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{
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$marker = $Line['text'][0];
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if (substr_count($Line['text'], $marker) >= 3 and chop($Line['text'], " $marker") === '') { return array('element' => array('name' => 'hr')); }
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}
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protected function blockSetextHeader($Line, ?array $Block = null)
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{
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if (!isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted'])) { return; }
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if ($Line['indent'] < 4 and chop(chop($Line['text'], ' '), $Line['text'][0]) === '') { $Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2'; return $Block; }
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}
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protected function blockMarkup($Line)
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{
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if ($this->markupEscaped or $this->safeMode) { return; }
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if (preg_match('/^<[\/]?+(\w*)(?:[ ]*+'.$this->regexHtmlAttribute.')*+[ ]*+(\/)?>/', $Line['text'], $matches))
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{
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$element = strtolower($matches[1]);
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if (in_array($element, $this->textLevelElements)) { return; }
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return array('name' => $matches[1], 'element' => array('rawHtml' => $Line['text'], 'autobreak' => true));
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}
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}
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protected function blockMarkupContinue($Line, array $Block)
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{
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if (isset($Block['closed']) or isset($Block['interrupted'])) { return; }
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$Block['element']['rawHtml'] .= "\n" . $Line['body'];
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return $Block;
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}
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protected function blockReference($Line)
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{
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if (strpos($Line['text'], ']') !== false and preg_match('/^\[(.+?)\]:[ ]*+<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*+$/', $Line['text'], $matches))
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{
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$id = strtolower($matches[1]);
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$this->DefinitionData['Reference'][$id] = array('url' => $matches[2], 'title' => isset($matches[3]) ? $matches[3] : null);
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return array('element' => array());
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}
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}
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protected function blockTable($Line, ?array $Block = null)
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{
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if (!isset($Block) or $Block['type'] !== 'Paragraph' or isset($Block['interrupted'])) { return; }
|
|
if (strpos($Block['element']['handler']['argument'], '|') === false and strpos($Line['text'], '|') === false and strpos($Line['text'], ':') === false or strpos($Block['element']['handler']['argument'], "\n") !== false) { return; }
|
|
if (chop($Line['text'], ' -:|') !== '') { return; }
|
|
$alignments = array();
|
|
$divider = trim(trim($Line['text']), '|');
|
|
$dividerCells = explode('|', $divider);
|
|
foreach ($dividerCells as $dividerCell)
|
|
{
|
|
$dividerCell = trim($dividerCell);
|
|
if ($dividerCell === '') { return; }
|
|
$alignment = null;
|
|
if ($dividerCell[0] === ':') { $alignment = 'left'; }
|
|
if (substr($dividerCell, -1) === ':') { $alignment = $alignment === 'left' ? 'center' : 'right'; }
|
|
$alignments[] = $alignment;
|
|
}
|
|
$HeaderElements = array();
|
|
$header = trim(trim($Block['element']['handler']['argument']), '|');
|
|
$headerCells = explode('|', $header);
|
|
if (count($headerCells) !== count($alignments)) { return; }
|
|
foreach ($headerCells as $index => $headerCell)
|
|
{
|
|
$headerCell = trim($headerCell);
|
|
$HeaderElement = array('name' => 'th', 'handler' => array('function' => 'lineElements', 'argument' => $headerCell, 'destination' => 'elements'));
|
|
if (isset($alignments[$index])) { $HeaderElement['attributes'] = array('style' => "text-align: {$alignments[$index]};"); }
|
|
$HeaderElements[] = $HeaderElement;
|
|
}
|
|
$Block = array('alignments' => $alignments, 'identified' => true, 'element' => array('name' => 'table', 'elements' => array()));
|
|
$Block['element']['elements'][] = array('name' => 'thead');
|
|
$Block['element']['elements'][] = array('name' => 'tbody', 'elements' => array());
|
|
$Block['element']['elements'][0]['elements'][] = array('name' => 'tr', 'elements' => $HeaderElements);
|
|
return $Block;
|
|
}
|
|
|
|
protected function blockTableContinue($Line, array $Block)
|
|
{
|
|
if (isset($Block['interrupted'])) { return; }
|
|
if (count($Block['alignments']) === 1 or $Line['text'][0] === '|' or strpos($Line['text'], '|'))
|
|
{
|
|
$Elements = array();
|
|
$row = trim(trim($Line['text']), '|');
|
|
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]++`|`)++/', $row, $matches);
|
|
$cells = array_slice($matches[0], 0, count($Block['alignments']));
|
|
foreach ($cells as $index => $cell)
|
|
{
|
|
$cell = trim($cell);
|
|
$Element = array('name' => 'td', 'handler' => array('function' => 'lineElements', 'argument' => $cell, 'destination' => 'elements'));
|
|
if (isset($Block['alignments'][$index])) { $Element['attributes'] = array('style' => 'text-align: ' . $Block['alignments'][$index] . ';'); }
|
|
$Elements[] = $Element;
|
|
}
|
|
$Block['element']['elements'][1]['elements'][] = array('name' => 'tr', 'elements' => $Elements);
|
|
return $Block;
|
|
}
|
|
}
|
|
|
|
protected function paragraph($Line)
|
|
{
|
|
return array('type' => 'Paragraph', 'element' => array('name' => 'p', 'handler' => array('function' => 'lineElements', 'argument' => $Line['text'], 'destination' => 'elements')));
|
|
}
|
|
|
|
protected function paragraphContinue($Line, array $Block)
|
|
{
|
|
if (isset($Block['interrupted'])) { return; }
|
|
$Block['element']['handler']['argument'] .= "\n" . $Line['text'];
|
|
return $Block;
|
|
}
|
|
|
|
protected $InlineTypes = array(
|
|
'!' => array('Image'), '&' => array('SpecialCharacter'), '*' => array('Emphasis'),
|
|
':' => array('Url'), '<' => array('UrlTag', 'EmailTag', 'Markup'), '[' => array('Link'),
|
|
'_' => array('Emphasis'), '`' => array('Code'), '~' => array('Strikethrough'), '\\' => array('EscapeSequence'),
|
|
);
|
|
|
|
protected $inlineMarkerList = '!*_&[:<`~\\';
|
|
|
|
public function line($text, $nonNestables = array())
|
|
{
|
|
return $this->elements($this->lineElements($text, $nonNestables));
|
|
}
|
|
|
|
protected function lineElements($text, $nonNestables = array())
|
|
{
|
|
$text = str_replace(array("\r\n", "\r"), "\n", $text);
|
|
$Elements = array();
|
|
$nonNestables = (empty($nonNestables) ? array() : array_combine($nonNestables, $nonNestables));
|
|
while ($excerpt = strpbrk($text, $this->inlineMarkerList))
|
|
{
|
|
$marker = $excerpt[0];
|
|
$markerPosition = strlen($text) - strlen($excerpt);
|
|
$Excerpt = array('text' => $excerpt, 'context' => $text);
|
|
foreach ($this->InlineTypes[$marker] as $inlineType)
|
|
{
|
|
if (isset($nonNestables[$inlineType])) { continue; }
|
|
$Inline = $this->{"inline$inlineType"}($Excerpt);
|
|
if (!isset($Inline)) { continue; }
|
|
if (isset($Inline['position']) and $Inline['position'] > $markerPosition) { continue; }
|
|
if (!isset($Inline['position'])) { $Inline['position'] = $markerPosition; }
|
|
$Inline['element']['nonNestables'] = isset($Inline['element']['nonNestables']) ? array_merge($Inline['element']['nonNestables'], $nonNestables) : $nonNestables;
|
|
$unmarkedText = substr($text, 0, $Inline['position']);
|
|
$InlineText = $this->inlineText($unmarkedText);
|
|
$Elements[] = $InlineText['element'];
|
|
$Elements[] = $this->extractElement($Inline);
|
|
$text = substr($text, $Inline['position'] + $Inline['extent']);
|
|
continue 2;
|
|
}
|
|
$unmarkedText = substr($text, 0, $markerPosition + 1);
|
|
$InlineText = $this->inlineText($unmarkedText);
|
|
$Elements[] = $InlineText['element'];
|
|
$text = substr($text, $markerPosition + 1);
|
|
}
|
|
$InlineText = $this->inlineText($text);
|
|
$Elements[] = $InlineText['element'];
|
|
foreach ($Elements as &$Element) { if (!isset($Element['autobreak'])) { $Element['autobreak'] = false; } }
|
|
return $Elements;
|
|
}
|
|
|
|
protected function inlineText($text)
|
|
{
|
|
$Inline = array('extent' => strlen($text), 'element' => array());
|
|
$Inline['element']['elements'] = self::pregReplaceElements(
|
|
$this->breaksEnabled ? '/[ ]*+\n/' : '/(?:[ ]*+\\\\|[ ]{2,}+)\n/',
|
|
array(array('name' => 'br'), array('text' => "\n")),
|
|
$text
|
|
);
|
|
return $Inline;
|
|
}
|
|
|
|
protected function inlineCode($Excerpt)
|
|
{
|
|
$marker = $Excerpt['text'][0];
|
|
if (preg_match('/^(['.$marker.']++)[ ]*+(.+?)[ ]*+(?<!['.$marker.'])\1(?!'.$marker.')/s', $Excerpt['text'], $matches))
|
|
{
|
|
return array('extent' => strlen($matches[0]), 'element' => array('name' => 'code', 'text' => preg_replace('/[ ]*+\n/', ' ', $matches[2])));
|
|
}
|
|
}
|
|
|
|
protected function inlineEmailTag($Excerpt)
|
|
{
|
|
$hostnameLabel = '[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?';
|
|
$commonMarkEmail = '[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]++@' . $hostnameLabel . '(?:\.' . $hostnameLabel . ')*';
|
|
if (strpos($Excerpt['text'], '>') !== false and preg_match("/^<((mailto:)?$commonMarkEmail)>/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' => array('function' => 'lineElements', 'argument' => $matches[1], 'destination' => 'elements')));
|
|
}
|
|
|
|
protected function inlineEscapeSequence($Excerpt)
|
|
{
|
|
if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters))
|
|
{
|
|
return array('element' => array('rawHtml' => $Excerpt['text'][1]), 'extent' => 2);
|
|
}
|
|
}
|
|
|
|
protected function inlineImage($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']['handler']['argument']), 'autobreak' => true));
|
|
$Inline['element']['attributes'] += $Link['element']['attributes'];
|
|
unset($Inline['element']['attributes']['href']);
|
|
return $Inline;
|
|
}
|
|
|
|
protected function inlineLink($Excerpt)
|
|
{
|
|
$Element = array('name' => 'a', 'handler' => array('function' => 'lineElements', 'argument' => null, 'destination' => 'elements'), 'nonNestables' => array('Url', 'Link'), 'attributes' => array('href' => null, 'title' => null));
|
|
$extent = 0;
|
|
$remainder = $Excerpt['text'];
|
|
if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches)) { $Element['handler']['argument'] = $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['handler']['argument']; $definition = strtolower($definition); $extent += strlen($matches[0]); }
|
|
else { $definition = strtolower($Element['handler']['argument']); }
|
|
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('element' => array('rawHtml' => $matches[0]), 'extent' => strlen($matches[0])); }
|
|
if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?+[^-])*-->/s', $Excerpt['text'], $matches)) { return array('element' => array('rawHtml' => $matches[0]), 'extent' => strlen($matches[0])); }
|
|
if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w[\w-]*+(?:[ ]*+'.$this->regexHtmlAttribute.')*+[ ]*+\/?>/s', $Excerpt['text'], $matches)) { return array('element' => array('rawHtml' => $matches[0]), 'extent' => strlen($matches[0])); }
|
|
}
|
|
|
|
protected function inlineSpecialCharacter($Excerpt)
|
|
{
|
|
if (substr($Excerpt['text'], 1, 1) !== ' ' and strpos($Excerpt['text'], ';') !== false and preg_match('/^&(#?+[0-9a-zA-Z]++);/', $Excerpt['text'], $matches))
|
|
{
|
|
return array('element' => array('rawHtml' => '&' . $matches[1] . ';'), 'extent' => strlen($matches[0]));
|
|
}
|
|
}
|
|
|
|
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', 'handler' => array('function' => 'lineElements', 'argument' => $matches[1], 'destination' => 'elements')));
|
|
}
|
|
}
|
|
|
|
protected function inlineUrl($Excerpt)
|
|
{
|
|
if ($this->urlsLinked !== true or !isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/') { return; }
|
|
if (strpos($Excerpt['context'], 'http') !== false and preg_match('/\bhttps?+:[\/]{2}[^\s<]+\b\/*+/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE))
|
|
{
|
|
$url = $matches[0][0];
|
|
return array('extent' => strlen($matches[0][0]), 'position' => $matches[0][1], 'element' => array('name' => 'a', 'text' => $url, 'attributes' => array('href' => $url)));
|
|
}
|
|
}
|
|
|
|
protected function inlineUrlTag($Excerpt)
|
|
{
|
|
if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\w++:\/{2}[^ >]++)>/i', $Excerpt['text'], $matches))
|
|
{
|
|
return array('extent' => strlen($matches[0]), 'element' => array('name' => 'a', 'text' => $matches[1], 'attributes' => array('href' => $matches[1])));
|
|
}
|
|
}
|
|
|
|
protected function unmarkedText($text)
|
|
{
|
|
$Inline = $this->inlineText($text);
|
|
return $this->element($Inline['element']);
|
|
}
|
|
|
|
protected function handle(array $Element)
|
|
{
|
|
if (isset($Element['handler']))
|
|
{
|
|
if (!isset($Element['nonNestables'])) { $Element['nonNestables'] = array(); }
|
|
if (is_string($Element['handler'])) { $function = $Element['handler']; $argument = $Element['text']; unset($Element['text']); $destination = 'rawHtml'; }
|
|
else { $function = $Element['handler']['function']; $argument = $Element['handler']['argument']; $destination = $Element['handler']['destination']; }
|
|
$Element[$destination] = $this->{$function}($argument, $Element['nonNestables']);
|
|
if ($destination === 'handler') { $Element = $this->handle($Element); }
|
|
unset($Element['handler']);
|
|
}
|
|
return $Element;
|
|
}
|
|
|
|
protected function handleElementRecursive(array $Element) { return $this->elementApplyRecursive(array($this, 'handle'), $Element); }
|
|
protected function handleElementsRecursive(array $Elements) { return $this->elementsApplyRecursive(array($this, 'handle'), $Elements); }
|
|
|
|
protected function elementApplyRecursive($closure, array $Element)
|
|
{
|
|
$Element = call_user_func($closure, $Element);
|
|
if (isset($Element['elements'])) { $Element['elements'] = $this->elementsApplyRecursive($closure, $Element['elements']); }
|
|
elseif (isset($Element['element'])) { $Element['element'] = $this->elementApplyRecursive($closure, $Element['element']); }
|
|
return $Element;
|
|
}
|
|
|
|
protected function elementApplyRecursiveDepthFirst($closure, array $Element)
|
|
{
|
|
if (isset($Element['elements'])) { $Element['elements'] = $this->elementsApplyRecursiveDepthFirst($closure, $Element['elements']); }
|
|
elseif (isset($Element['element'])) { $Element['element'] = $this->elementsApplyRecursiveDepthFirst($closure, $Element['element']); }
|
|
return call_user_func($closure, $Element);
|
|
}
|
|
|
|
protected function elementsApplyRecursive($closure, array $Elements) { foreach ($Elements as &$Element) { $Element = $this->elementApplyRecursive($closure, $Element); } return $Elements; }
|
|
protected function elementsApplyRecursiveDepthFirst($closure, array $Elements) { foreach ($Elements as &$Element) { $Element = $this->elementApplyRecursiveDepthFirst($closure, $Element); } return $Elements; }
|
|
|
|
protected function element(array $Element)
|
|
{
|
|
if ($this->safeMode) { $Element = $this->sanitiseElement($Element); }
|
|
$Element = $this->handle($Element);
|
|
$hasName = isset($Element['name']);
|
|
$markup = '';
|
|
if ($hasName) { $markup .= '<' . $Element['name']; if (isset($Element['attributes'])) { foreach ($Element['attributes'] as $name => $value) { if ($value === null) { continue; } $markup .= " $name=\"" . self::escape($value) . '"'; } } }
|
|
$permitRawHtml = false;
|
|
if (isset($Element['text'])) { $text = $Element['text']; }
|
|
elseif (isset($Element['rawHtml'])) { $text = $Element['rawHtml']; $allowRawHtmlInSafeMode = isset($Element['allowRawHtmlInSafeMode']) && $Element['allowRawHtmlInSafeMode']; $permitRawHtml = !$this->safeMode || $allowRawHtmlInSafeMode; }
|
|
$hasContent = isset($text) || isset($Element['element']) || isset($Element['elements']);
|
|
if ($hasContent) { $markup .= $hasName ? '>' : ''; if (isset($Element['elements'])) { $markup .= $this->elements($Element['elements']); } elseif (isset($Element['element'])) { $markup .= $this->element($Element['element']); } else { $markup .= $permitRawHtml ? $text : self::escape($text, true); } $markup .= $hasName ? '</' . $Element['name'] . '>' : ''; }
|
|
elseif ($hasName) { $markup .= ' />'; }
|
|
return $markup;
|
|
}
|
|
|
|
protected function elements(array $Elements)
|
|
{
|
|
$markup = '';
|
|
$autoBreak = true;
|
|
foreach ($Elements as $Element)
|
|
{
|
|
if (empty($Element)) { continue; }
|
|
$autoBreakNext = (isset($Element['autobreak']) ? $Element['autobreak'] : isset($Element['name']));
|
|
$autoBreak = !$autoBreak ? $autoBreak : $autoBreakNext;
|
|
$markup .= ($autoBreak ? "\n" : '') . $this->element($Element);
|
|
$autoBreak = $autoBreakNext;
|
|
}
|
|
$markup .= $autoBreak ? "\n" : '';
|
|
return $markup;
|
|
}
|
|
|
|
protected function li($lines)
|
|
{
|
|
$Elements = $this->linesElements($lines);
|
|
if (!in_array('', $lines) and isset($Elements[0]) and isset($Elements[0]['name']) and $Elements[0]['name'] === 'p') { unset($Elements[0]['name']); }
|
|
return $Elements;
|
|
}
|
|
|
|
protected static function pregReplaceElements($regexp, $Elements, $text)
|
|
{
|
|
$newElements = array();
|
|
while (preg_match($regexp, $text, $matches, PREG_OFFSET_CAPTURE))
|
|
{
|
|
$offset = $matches[0][1];
|
|
$before = substr($text, 0, $offset);
|
|
$after = substr($text, $offset + strlen($matches[0][0]));
|
|
$newElements[] = array('text' => $before);
|
|
foreach ($Elements as $Element) { $newElements[] = $Element; }
|
|
$text = $after;
|
|
}
|
|
$newElements[] = array('text' => $text);
|
|
return $newElements;
|
|
}
|
|
|
|
function parse($text) { return $this->text($text); }
|
|
|
|
protected function sanitiseElement(array $Element)
|
|
{
|
|
static $goodAttribute = '/^[a-zA-Z0-9][a-zA-Z0-9-_]*+$/';
|
|
static $safeUrlNameToAtt = array('a' => 'href', 'img' => 'src');
|
|
if (!isset($Element['name'])) { unset($Element['attributes']); return $Element; }
|
|
if (isset($safeUrlNameToAtt[$Element['name']])) { $Element = $this->filterUnsafeUrlInAttribute($Element, $safeUrlNameToAtt[$Element['name']]); }
|
|
if (!empty($Element['attributes'])) { foreach ($Element['attributes'] as $att => $val) { if (!preg_match($goodAttribute, $att)) { unset($Element['attributes'][$att]); } elseif (self::striAtStart($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 $Element;
|
|
}
|
|
|
|
protected static function escape($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; } return strtolower(substr($string, 0, $len)) === strtolower($needle); }
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static function instance($name = 'default')
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{
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if (isset(self::$instances[$name])) { return self::$instances[$name]; }
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$instance = new static();
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self::$instances[$name] = $instance;
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return $instance;
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}
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private static $instances = array();
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protected $DefinitionData;
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protected $specialCharacters = array('\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|', '~');
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protected $StrongRegex = array('*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*+[*])+?)[*]{2}(?![*])/s', '_' => '/^__((?:\\\\_|[^_]|_[^_]*+_)+?)__(?!_)/us');
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protected $EmRegex = array('*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s', '_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us');
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protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*+(?:\s*+=\s*+(?:[^"\'=<>`\s]+|"[^"]*+"|\'[^\']*+\'))?+';
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protected $voidElements = array('area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source');
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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');
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}
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