From 3fa549352ca13d020a8cffaaad0db81b7c66c5b3 Mon Sep 17 00:00:00 2001 From: Frédéric Guillot Date: Sat, 27 Sep 2014 21:12:12 -0400 Subject: Replace Markdown parser by Parsedown --- vendor/Parsedown/LICENSE.txt | 20 + vendor/Parsedown/Parsedown.php | 1423 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1443 insertions(+) create mode 100644 vendor/Parsedown/LICENSE.txt create mode 100644 vendor/Parsedown/Parsedown.php (limited to 'vendor/Parsedown') diff --git a/vendor/Parsedown/LICENSE.txt b/vendor/Parsedown/LICENSE.txt new file mode 100644 index 00000000..baca86f5 --- /dev/null +++ b/vendor/Parsedown/LICENSE.txt @@ -0,0 +1,20 @@ +The MIT License (MIT) + +Copyright (c) 2013 Emanuil Rusev, erusev.com + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. \ No newline at end of file diff --git a/vendor/Parsedown/Parsedown.php b/vendor/Parsedown/Parsedown.php new file mode 100644 index 00000000..5d6f0f76 --- /dev/null +++ b/vendor/Parsedown/Parsedown.php @@ -0,0 +1,1423 @@ +Definitions = array(); + + # standardize line breaks + $text = str_replace("\r\n", "\n", $text); + $text = str_replace("\r", "\n", $text); + + # replace tabs with spaces + $text = str_replace("\t", ' ', $text); + + # remove surrounding line breaks + $text = trim($text, "\n"); + + # split text into lines + $lines = explode("\n", $text); + + # iterate through lines to identify blocks + $markup = $this->lines($lines); + + # trim line breaks + $markup = trim($markup, "\n"); + + return $markup; + } + + # + # Setters + # + + private $breaksEnabled; + + function setBreaksEnabled($breaksEnabled) + { + $this->breaksEnabled = $breaksEnabled; + + return $this; + } + + private $markupEscaped; + + function setMarkupEscaped($markupEscaped) + { + $this->markupEscaped = $markupEscaped; + + return $this; + } + + # + # Lines + # + + protected $BlockTypes = array( + '#' => array('Atx'), + '*' => array('Rule', 'List'), + '+' => array('List'), + '-' => array('Setext', 'Table', 'Rule', 'List'), + '0' => array('List'), + '1' => array('List'), + '2' => array('List'), + '3' => array('List'), + '4' => array('List'), + '5' => array('List'), + '6' => array('List'), + '7' => array('List'), + '8' => array('List'), + '9' => array('List'), + ':' => array('Table'), + '<' => array('Comment', 'Markup'), + '=' => array('Setext'), + '>' => array('Quote'), + '_' => array('Rule'), + '`' => array('FencedCode'), + '|' => array('Table'), + '~' => array('FencedCode'), + ); + + # ~ + + protected $DefinitionTypes = array( + '[' => array('Reference'), + ); + + # ~ + + protected $unmarkedBlockTypes = array( + 'CodeBlock', + ); + + # + # Blocks + # + + private function lines(array $lines) + { + $CurrentBlock = null; + + foreach ($lines as $line) + { + if (chop($line) === '') + { + if (isset($CurrentBlock)) + { + $CurrentBlock['interrupted'] = true; + } + + continue; + } + + $indent = 0; + + while (isset($line[$indent]) and $line[$indent] === ' ') + { + $indent ++; + } + + $text = $indent > 0 ? substr($line, $indent) : $line; + + # ~ + + $Line = array('body' => $line, 'indent' => $indent, 'text' => $text); + + # ~ + + if (isset($CurrentBlock['incomplete'])) + { + $Block = $this->{'addTo'.$CurrentBlock['type']}($Line, $CurrentBlock); + + if (isset($Block)) + { + $CurrentBlock = $Block; + + continue; + } + else + { + if (method_exists($this, 'complete'.$CurrentBlock['type'])) + { + $CurrentBlock = $this->{'complete'.$CurrentBlock['type']}($CurrentBlock); + } + + unset($CurrentBlock['incomplete']); + } + } + + # ~ + + $marker = $text[0]; + + if (isset($this->DefinitionTypes[$marker])) + { + foreach ($this->DefinitionTypes[$marker] as $definitionType) + { + $Definition = $this->{'identify'.$definitionType}($Line, $CurrentBlock); + + if (isset($Definition)) + { + $this->Definitions[$definitionType][$Definition['id']] = $Definition['data']; + + continue 2; + } + } + } + + # ~ + + $blockTypes = $this->unmarkedBlockTypes; + + if (isset($this->BlockTypes[$marker])) + { + foreach ($this->BlockTypes[$marker] as $blockType) + { + $blockTypes []= $blockType; + } + } + + # + # ~ + + foreach ($blockTypes as $blockType) + { + $Block = $this->{'identify'.$blockType}($Line, $CurrentBlock); + + if (isset($Block)) + { + $Block['type'] = $blockType; + + if ( ! isset($Block['identified'])) + { + $Elements []= $CurrentBlock['element']; + + $Block['identified'] = true; + } + + if (method_exists($this, 'addTo'.$blockType)) + { + $Block['incomplete'] = true; + } + + $CurrentBlock = $Block; + + continue 2; + } + } + + # ~ + + if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted'])) + { + $CurrentBlock['element']['text'] .= "\n".$text; + } + else + { + $Elements []= $CurrentBlock['element']; + + $CurrentBlock = $this->buildParagraph($Line); + + $CurrentBlock['identified'] = true; + } + } + + # ~ + + if (isset($CurrentBlock['incomplete']) and method_exists($this, 'complete'.$CurrentBlock['type'])) + { + $CurrentBlock = $this->{'complete'.$CurrentBlock['type']}($CurrentBlock); + } + + # ~ + + $Elements []= $CurrentBlock['element']; + + unset($Elements[0]); + + # ~ + + $markup = $this->elements($Elements); + + # ~ + + return $markup; + } + + # + # Atx + + protected function identifyAtx($Line) + { + if (isset($Line['text'][1])) + { + $level = 1; + + while (isset($Line['text'][$level]) and $Line['text'][$level] === '#') + { + $level ++; + } + + $text = trim($Line['text'], '# '); + + $Block = array( + 'element' => array( + 'name' => 'h' . min(6, $level), + 'text' => $text, + 'handler' => 'line', + ), + ); + + return $Block; + } + } + + # + # Code + + protected function identifyCodeBlock($Line) + { + if ($Line['indent'] >= 4) + { + $text = substr($Line['body'], 4); + + $Block = array( + 'element' => array( + 'name' => 'pre', + 'handler' => 'element', + 'text' => array( + 'name' => 'code', + 'text' => $text, + ), + ), + ); + + return $Block; + } + } + + protected function addToCodeBlock($Line, $Block) + { + if ($Line['indent'] >= 4) + { + if (isset($Block['interrupted'])) + { + $Block['element']['text']['text'] .= "\n"; + + unset($Block['interrupted']); + } + + $Block['element']['text']['text'] .= "\n"; + + $text = substr($Line['body'], 4); + + $Block['element']['text']['text'] .= $text; + + return $Block; + } + } + + protected function completeCodeBlock($Block) + { + $text = $Block['element']['text']['text']; + + $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8'); + + $Block['element']['text']['text'] = $text; + + return $Block; + } + + # + # Comment + + protected function identifyComment($Line) + { + if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!') + { + $Block = array( + 'element' => $Line['body'], + ); + + if (preg_match('/-->$/', $Line['text'])) + { + $Block['closed'] = true; + } + + return $Block; + } + } + + protected function addToComment($Line, array $Block) + { + if (isset($Block['closed'])) + { + return; + } + + $Block['element'] .= "\n" . $Line['body']; + + if (preg_match('/-->$/', $Line['text'])) + { + $Block['closed'] = true; + } + + return $Block; + } + + # + # Fenced Code + + protected function identifyFencedCode($Line) + { + if (preg_match('/^(['.$Line['text'][0].']{3,})[ ]*([\w-]+)?[ ]*$/', $Line['text'], $matches)) + { + $Element = array( + 'name' => 'code', + 'text' => '', + ); + + if (isset($matches[2])) + { + $class = 'language-'.$matches[2]; + + $Element['attributes'] = array( + 'class' => $class, + ); + } + + $Block = array( + 'char' => $Line['text'][0], + 'element' => array( + 'name' => 'pre', + 'handler' => 'element', + 'text' => $Element, + ), + ); + + return $Block; + } + } + + protected function addToFencedCode($Line, $Block) + { + if (isset($Block['complete'])) + { + return; + } + + if (isset($Block['interrupted'])) + { + $Block['element']['text']['text'] .= "\n"; + + unset($Block['interrupted']); + } + + if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text'])) + { + $Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1); + + $Block['complete'] = true; + + return $Block; + } + + $Block['element']['text']['text'] .= "\n".$Line['body'];; + + return $Block; + } + + protected function completeFencedCode($Block) + { + $text = $Block['element']['text']['text']; + + $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8'); + + $Block['element']['text']['text'] = $text; + + return $Block; + } + + # + # List + + protected function identifyList($Line) + { + list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]'); + + if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches)) + { + $Block = array( + 'indent' => $Line['indent'], + 'pattern' => $pattern, + 'element' => array( + 'name' => $name, + 'handler' => 'elements', + ), + ); + + $Block['li'] = array( + 'name' => 'li', + 'handler' => 'li', + 'text' => array( + $matches[2], + ), + ); + + $Block['element']['text'] []= & $Block['li']; + + return $Block; + } + } + + protected function addToList($Line, array $Block) + { + if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'[ ]+(.*)/', $Line['text'], $matches)) + { + if (isset($Block['interrupted'])) + { + $Block['li']['text'] []= ''; + + unset($Block['interrupted']); + } + + unset($Block['li']); + + $Block['li'] = array( + 'name' => 'li', + 'handler' => 'li', + 'text' => array( + $matches[1], + ), + ); + + $Block['element']['text'] []= & $Block['li']; + + return $Block; + } + + if ( ! isset($Block['interrupted'])) + { + $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); + + $Block['li']['text'] []= $text; + + return $Block; + } + + if ($Line['indent'] > 0) + { + $Block['li']['text'] []= ''; + + $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']); + + $Block['li']['text'] []= $text; + + unset($Block['interrupted']); + + return $Block; + } + } + + # + # Quote + + protected function identifyQuote($Line) + { + if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches)) + { + $Block = array( + 'element' => array( + 'name' => 'blockquote', + 'handler' => 'lines', + 'text' => (array) $matches[1], + ), + ); + + return $Block; + } + } + + protected function addToQuote($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 $Block; + } + } + + # + # Rule + + protected function identifyRule($Line) + { + if (preg_match('/^(['.$Line['text'][0].'])([ ]{0,2}\1){2,}[ ]*$/', $Line['text'])) + { + $Block = array( + 'element' => array( + 'name' => 'hr' + ), + ); + + return $Block; + } + } + + # + # Setext + + protected function identifySetext($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 $Block; + } + } + + # + # Markup + + protected function identifyMarkup($Line) + { + if ($this->markupEscaped) + { + return; + } + + if (preg_match('/^<(\w[\w\d]*)(?:[ ][^>]*)?(\/?)[ ]*>/', $Line['text'], $matches)) + { + if (in_array($matches[1], $this->textLevelElements)) + { + return; + } + + $Block = array( + 'element' => $Line['body'], + ); + + if ($matches[2] or $matches[1] === 'hr' or preg_match('/<\/'.$matches[1].'>[ ]*$/', $Line['text'])) + { + $Block['closed'] = true; + } + else + { + $Block['depth'] = 0; + $Block['name'] = $matches[1]; + } + + return $Block; + } + } + + protected function addToMarkup($Line, array $Block) + { + if (isset($Block['closed'])) + { + return; + } + + if (preg_match('/<'.$Block['name'].'([ ][^\/]+)?>/', $Line['text'])) # opening tag + { + $Block['depth'] ++; + } + + if (stripos($Line['text'], '') !== false) # closing tag + { + if ($Block['depth'] > 0) + { + $Block['depth'] --; + } + else + { + $Block['closed'] = true; + } + } + + $Block['element'] .= "\n".$Line['body']; + + return $Block; + } + + # + # Table + + protected function identifyTable($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( + '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 $Block; + } + } + + protected function addToTable($Line, array $Block) + { + if ($Line['text'][0] === '|' or strpos($Line['text'], '|')) + { + $Elements = array(); + + $row = $Line['text']; + + $row = trim($row); + $row = trim($row, '|'); + + $cells = explode('|', $row); + + foreach ($cells as $index => $cell) + { + $cell = trim($cell); + + $Element = array( + 'name' => 'td', + 'handler' => 'line', + 'text' => $cell, + ); + + if (isset($Block['alignments'][$index])) + { + $Element['attributes'] = array( + 'align' => $Block['alignments'][$index], + ); + } + + $Elements []= $Element; + } + + $Element = array( + 'name' => 'tr', + 'handler' => 'elements', + 'text' => $Elements, + ); + + $Block['element']['text'][1]['text'] []= $Element; + + return $Block; + } + } + + # + # Definitions + # + + protected function identifyReference($Line) + { + if (preg_match('/^\[(.+?)\]:[ ]*?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches)) + { + $Definition = array( + 'id' => strtolower($matches[1]), + 'data' => array( + 'url' => $matches[2], + ), + ); + + if (isset($matches[3])) + { + $Definition['data']['title'] = $matches[3]; + } + + return $Definition; + } + } + + # + # ~ + # + + protected function buildParagraph($Line) + { + $Block = array( + 'element' => array( + 'name' => 'p', + 'text' => $Line['text'], + 'handler' => 'line', + ), + ); + + return $Block; + } + + # + # ~ + # + + protected function element(array $Element) + { + $markup = '<'.$Element['name']; + + if (isset($Element['attributes'])) + { + foreach ($Element['attributes'] as $name => $value) + { + $markup .= ' '.$name.'="'.$value.'"'; + } + } + + if (isset($Element['text'])) + { + $markup .= '>'; + + if (isset($Element['handler'])) + { + $markup .= $this->$Element['handler']($Element['text']); + } + else + { + $markup .= $Element['text']; + } + + $markup .= ''; + } + else + { + $markup .= ' />'; + } + + return $markup; + } + + protected function elements(array $Elements) + { + $markup = ''; + + foreach ($Elements as $Element) + { + if ($Element === null) + { + continue; + } + + $markup .= "\n"; + + if (is_string($Element)) # because of Markup + { + $markup .= $Element; + + continue; + } + + $markup .= $this->element($Element); + } + + $markup .= "\n"; + + return $markup; + } + + # + # Spans + # + + protected $SpanTypes = array( + '!' => array('Link'), # ? + '&' => array('Ampersand'), + '*' => array('Emphasis'), + '/' => array('Url'), + '<' => array('UrlTag', 'EmailTag', 'Tag', 'LessThan'), + '[' => array('Link'), + '_' => array('Emphasis'), + '`' => array('InlineCode'), + '~' => array('Strikethrough'), + '\\' => array('EscapeSequence'), + ); + + # ~ + + protected $spanMarkerList = '*_!&[spanMarkerList)) + { + $marker = $excerpt[0]; + + $markerPosition += strpos($remainder, $marker); + + $Excerpt = array('text' => $excerpt, 'context' => $text); + + foreach ($this->SpanTypes[$marker] as $spanType) + { + $handler = 'identify'.$spanType; + + $Span = $this->$handler($Excerpt); + + if ( ! isset($Span)) + { + continue; + } + + # The identified span can be ahead of the marker. + + if (isset($Span['position']) and $Span['position'] > $markerPosition) + { + continue; + } + + # Spans that start at the position of their marker don't have to set a position. + + if ( ! isset($Span['position'])) + { + $Span['position'] = $markerPosition; + } + + $plainText = substr($text, 0, $Span['position']); + + $markup .= $this->readPlainText($plainText); + + $markup .= isset($Span['markup']) ? $Span['markup'] : $this->element($Span['element']); + + $text = substr($text, $Span['position'] + $Span['extent']); + + $remainder = $text; + + $markerPosition = 0; + + continue 2; + } + + $remainder = substr($excerpt, 1); + + $markerPosition ++; + } + + $markup .= $this->readPlainText($text); + + return $markup; + } + + # + # ~ + # + + protected function identifyUrl($Excerpt) + { + if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '/') + { + return; + } + + if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE)) + { + $url = str_replace(array('&', '<'), array('&', '<'), $matches[0][0]); + + return array( + 'extent' => strlen($matches[0][0]), + 'position' => $matches[0][1], + 'element' => array( + 'name' => 'a', + 'text' => $url, + 'attributes' => array( + 'href' => $url, + ), + ), + ); + } + } + + protected function identifyAmpersand($Excerpt) + { + if ( ! preg_match('/^&#?\w+;/', $Excerpt['text'])) + { + return array( + 'markup' => '&', + 'extent' => 1, + ); + } + } + + protected function identifyStrikethrough($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' => $matches[1], + 'handler' => 'line', + ), + ); + } + } + + protected function identifyEscapeSequence($Excerpt) + { + if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters)) + { + return array( + 'markup' => $Excerpt['text'][1], + 'extent' => 2, + ); + } + } + + protected function identifyLessThan() + { + return array( + 'markup' => '<', + 'extent' => 1, + ); + } + + protected function identifyUrlTag($Excerpt) + { + if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(https?:[\/]{2}[^\s]+?)>/i', $Excerpt['text'], $matches)) + { + $url = str_replace(array('&', '<'), array('&', '<'), $matches[1]); + + return array( + 'extent' => strlen($matches[0]), + 'element' => array( + 'name' => 'a', + 'text' => $url, + 'attributes' => array( + 'href' => $url, + ), + ), + ); + } + } + + protected function identifyEmailTag($Excerpt) + { + if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\S+?@\S+?)>/', $Excerpt['text'], $matches)) + { + return array( + 'extent' => strlen($matches[0]), + 'element' => array( + 'name' => 'a', + 'text' => $matches[1], + 'attributes' => array( + 'href' => 'mailto:'.$matches[1], + ), + ), + ); + } + } + + protected function identifyTag($Excerpt) + { + if ($this->markupEscaped) + { + return; + } + + if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<\/?\w.*?>/', $Excerpt['text'], $matches)) + { + return array( + 'markup' => $matches[0], + 'extent' => strlen($matches[0]), + ); + } + } + + protected function identifyInlineCode($Excerpt) + { + $marker = $Excerpt['text'][0]; + + if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(? strlen($matches[0]), + 'element' => array( + 'name' => 'code', + 'text' => $text, + ), + ); + } + } + + protected function identifyLink($Excerpt) + { + $extent = $Excerpt['text'][0] === '!' ? 1 : 0; + + if (strpos($Excerpt['text'], ']') and preg_match('/\[((?:[^][]|(?R))*)\]/', $Excerpt['text'], $matches)) + { + $Link = array('text' => $matches[1], 'label' => strtolower($matches[1])); + + $extent += strlen($matches[0]); + + $substring = substr($Excerpt['text'], $extent); + + if (preg_match('/^\s*\[([^][]+)\]/', $substring, $matches)) + { + $Link['label'] = strtolower($matches[1]); + + if (isset($this->Definitions['Reference'][$Link['label']])) + { + $Link += $this->Definitions['Reference'][$Link['label']]; + + $extent += strlen($matches[0]); + } + else + { + return; + } + } + elseif (isset($this->Definitions['Reference'][$Link['label']])) + { + $Link += $this->Definitions['Reference'][$Link['label']]; + + if (preg_match('/^[ ]*\[\]/', $substring, $matches)) + { + $extent += strlen($matches[0]); + } + } + elseif (preg_match('/^\([ ]*(.*?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*\)/', $substring, $matches)) + { + $Link['url'] = $matches[1]; + + if (isset($matches[2])) + { + $Link['title'] = $matches[2]; + } + + $extent += strlen($matches[0]); + } + else + { + return; + } + } + else + { + return; + } + + $url = str_replace(array('&', '<'), array('&', '<'), $Link['url']); + + if ($Excerpt['text'][0] === '!') + { + $Element = array( + 'name' => 'img', + 'attributes' => array( + 'alt' => $Link['text'], + 'src' => $url, + ), + ); + } + else + { + $Element = array( + 'name' => 'a', + 'handler' => 'line', + 'text' => $Link['text'], + 'attributes' => array( + 'href' => $url, + ), + ); + } + + if (isset($Link['title'])) + { + $Element['attributes']['title'] = $Link['title']; + } + + return array( + 'extent' => $extent, + 'element' => $Element, + ); + } + + protected function identifyEmphasis($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' => $matches[1], + ), + ); + } + + # + # ~ + + protected function readPlainText($text) + { + $breakMarker = $this->breaksEnabled ? "\n" : " \n"; + + $text = str_replace($breakMarker, "
\n", $text); + + return $text; + } + + # + # ~ + # + + protected function li($lines) + { + $markup = $this->lines($lines); + + $trimmedMarkup = trim($markup); + + if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '

') + { + $markup = $trimmedMarkup; + $markup = substr($markup, 3); + + $position = strpos($markup, "

"); + + $markup = substr_replace($markup, '', $position, 4); + } + + return $markup; + } + + # + # Multiton + # + + static function instance($name = 'default') + { + if (isset(self::$instances[$name])) + { + return self::$instances[$name]; + } + + $instance = new self(); + + self::$instances[$name] = $instance; + + return $instance; + } + + private static $instances = array(); + + # + # Deprecated Methods + # + + /** + * @deprecated in favor of "text" + */ + function parse($text) + { + $markup = $this->text($text); + + return $markup; + } + + # + # Fields + # + + protected $Definitions; + + # + # Read-only + + protected $specialCharacters = array( + '\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', + ); + + protected $StrongRegex = array( + '*' => '/^[*]{2}((?:[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s', + '_' => '/^__((?:[^_]|_[^_]*_)+?)__(?!_)/us', + ); + + protected $EmRegex = array( + '*' => '/^[*]((?:[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s', + '_' => '/^_((?:[^_]|__[^_]*__)+?)_(?!_)\b/us', + ); + + 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', 'sub', 'mark', + 'u', 'xm', 'sup', 'nobr', + 'var', 'ruby', + 'wbr', 'span', + 'time', + ); +} -- cgit v1.2.3