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<?php |
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# |
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# Markdown - A text-to-HTML conversion tool for web writers |
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# |
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# PHP Markdown |
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# Copyright (c) 2004-2012 Michel Fortin |
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# <http://michelf.com/projects/php-markdown/> |
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# |
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# Original Markdown |
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# Copyright (c) 2004-2006 John Gruber |
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# <http://daringfireball.net/projects/markdown/> |
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# |
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|
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|
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define( 'MARKDOWN_VERSION', "1.0.1o" ); # Sun 8 Jan 2012 |
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|
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|
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# |
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# Global default settings: |
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# |
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|
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# Change to ">" for HTML output |
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@define( 'MARKDOWN_EMPTY_ELEMENT_SUFFIX', " />"); |
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|
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# Define the width of a tab for code blocks. |
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@define( 'MARKDOWN_TAB_WIDTH', 4 ); |
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|
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### Standard Function Interface ### |
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|
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@define( 'MARKDOWN_PARSER_CLASS', 'Markdown_Parser' ); |
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|
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|
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if( !function_exists('Markdown') ) |
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{ |
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function Markdown($text) { |
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# |
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# Initialize the parser and return the result of its transform method. |
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# |
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# Setup static parser variable. |
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static $parser; |
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if (!isset($parser)) { |
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$parser_class = MARKDOWN_PARSER_CLASS; |
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$parser = new $parser_class; |
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} |
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|
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# Transform text using parser. |
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return $parser->transform($text); |
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} |
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} |
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|
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|
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### bBlog Plugin Info ### |
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if( !function_exists('identify_modifier_markdown') ) |
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{ |
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function identify_modifier_markdown() { |
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return array( |
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'name' => 'markdown', |
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'type' => 'modifier', |
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'nicename' => 'Markdown', |
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'description' => 'A text-to-HTML conversion tool for web writers', |
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'authors' => 'Michel Fortin and John Gruber', |
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'licence' => 'BSD-like', |
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'version' => MARKDOWN_VERSION, |
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'help' => '<a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://michelf.com/projects/php-markdown/">More...</a>' |
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); |
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} |
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} |
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|
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|
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### Smarty Modifier Interface ### |
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|
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if( !function_exists('smarty_modifier_markdown') ) |
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{ |
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function smarty_modifier_markdown($text) { |
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return Markdown($text); |
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} |
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} |
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|
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# |
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# Markdown Parser Class |
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# |
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|
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if( !class_exists('Markdown_Parser') ) |
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{ |
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class Markdown_Parser |
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{ |
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|
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# Regex to match balanced [brackets]. |
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# Needed to insert a maximum bracked depth while converting to PHP. |
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var $nested_brackets_depth = 6; |
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var $nested_brackets_re; |
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|
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var $nested_url_parenthesis_depth = 4; |
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var $nested_url_parenthesis_re; |
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|
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# Table of hash values for escaped characters: |
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var $escape_chars = '\`*_{}[]()>#+-.!'; |
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var $escape_chars_re; |
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|
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# Change to ">" for HTML output. |
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var $empty_element_suffix = MARKDOWN_EMPTY_ELEMENT_SUFFIX; |
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var $tab_width = MARKDOWN_TAB_WIDTH; |
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|
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# Change to `true` to disallow markup or entities. |
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var $no_markup = false; |
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var $no_entities = false; |
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|
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# Predefined urls and titles for reference links and images. |
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var $predef_urls = array(); |
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var $predef_titles = array(); |
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|
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|
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function Markdown_Parser() { |
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# |
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# Constructor function. Initialize appropriate member variables. |
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# |
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$this->_initDetab(); |
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$this->prepareItalicsAndBold(); |
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|
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$this->nested_brackets_re = |
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str_repeat('(?>[^\[\]]+|\[', $this->nested_brackets_depth). |
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str_repeat('\])*', $this->nested_brackets_depth); |
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|
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$this->nested_url_parenthesis_re = |
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str_repeat('(?>[^()\s]+|\(', $this->nested_url_parenthesis_depth). |
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str_repeat('(?>\)))*', $this->nested_url_parenthesis_depth); |
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|
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$this->escape_chars_re = '['.preg_quote($this->escape_chars).']'; |
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|
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# Sort document, block, and span gamut in ascendent priority order. |
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asort($this->document_gamut); |
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asort($this->block_gamut); |
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asort($this->span_gamut); |
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} |
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|
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|
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# Internal hashes used during transformation. |
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var $urls = array(); |
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var $titles = array(); |
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var $html_hashes = array(); |
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|
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# Status flag to avoid invalid nesting. |
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var $in_anchor = false; |
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|
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|
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function setup() { |
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# |
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# Called before the transformation process starts to setup parser |
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# states. |
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# |
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# Clear global hashes. |
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$this->urls = $this->predef_urls; |
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$this->titles = $this->predef_titles; |
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$this->html_hashes = array(); |
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|
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$in_anchor = false; |
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} |
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|
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function teardown() { |
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# |
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# Called after the transformation process to clear any variable |
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# which may be taking up memory unnecessarly. |
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# |
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$this->urls = array(); |
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$this->titles = array(); |
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$this->html_hashes = array(); |
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} |
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|
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|
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function transform($text) { |
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# |
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# Main function. Performs some preprocessing on the input text |
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# and pass it through the document gamut. |
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# |
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$this->setup(); |
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|
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# Remove UTF-8 BOM and marker character in input, if present. |
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$text = preg_replace('{^\xEF\xBB\xBF|\x1A}', '', $text); |
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|
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# Standardize line endings: |
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# DOS to Unix and Mac to Unix |
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$text = preg_replace('{\r\n?}', "\n", $text); |
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|
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# Make sure $text ends with a couple of newlines: |
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$text .= "\n\n"; |
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|
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# Convert all tabs to spaces. |
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$text = $this->detab($text); |
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|
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# Turn block-level HTML blocks into hash entries |
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$text = $this->hashHTMLBlocks($text); |
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|
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# Strip any lines consisting only of spaces and tabs. |
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# This makes subsequent regexen easier to write, because we can |
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# match consecutive blank lines with /\n+/ instead of something |
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# contorted like /[ ]*\n+/ . |
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$text = preg_replace('/^[ ]+$/m', '', $text); |
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|
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# Run document gamut methods. |
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foreach ($this->document_gamut as $method => $priority) { |
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$text = $this->$method($text); |
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} |
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|
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$this->teardown(); |
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|
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return $text . "\n"; |
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} |
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|
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var $document_gamut = array( |
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# Strip link definitions, store in hashes. |
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"stripLinkDefinitions" => 20, |
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|
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"runBasicBlockGamut" => 30, |
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); |
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|
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|
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function stripLinkDefinitions($text) { |
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# |
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# Strips link definitions from text, stores the URLs and titles in |
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# hash references. |
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# |
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$less_than_tab = $this->tab_width - 1; |
| 223 |
|
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# Link defs are in the form: ^[id]: url "optional title" |
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$text = preg_replace_callback('{ |
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^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1 |
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[ ]* |
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\n? # maybe *one* newline |
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[ ]* |
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(?: |
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<(.+?)> # url = $2 |
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| |
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(\S+?) # url = $3 |
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) |
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[ ]* |
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\n? # maybe one newline |
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[ ]* |
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(?: |
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(?<=\s) # lookbehind for whitespace |
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["(] |
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(.*?) # title = $4 |
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[")] |
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[ ]* |
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)? # title is optional |
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(?:\n+|\Z) |
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}xm', |
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array(&$this, '_stripLinkDefinitions_callback'), |
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$text); |
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return $text; |
| 250 |
} |
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function _stripLinkDefinitions_callback($matches) { |
| 252 |
$link_id = strtolower($matches[1]); |
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$url = $matches[2] == '' ? $matches[3] : $matches[2]; |
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$this->urls[$link_id] = $url; |
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$this->titles[$link_id] =& $matches[4]; |
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return ''; # String that will replace the block |
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} |
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|
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|
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function hashHTMLBlocks($text) { |
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if ($this->no_markup) return $text; |
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|
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$less_than_tab = $this->tab_width - 1; |
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|
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# Hashify HTML blocks: |
| 266 |
# We only want to do this for block-level HTML tags, such as headers, |
| 267 |
# lists, and tables. That's because we still want to wrap <p>s around |
| 268 |
# "paragraphs" that are wrapped in non-block-level tags, such as anchors, |
| 269 |
# phrase emphasis, and spans. The list of tags we're looking for is |
| 270 |
# hard-coded: |
| 271 |
# |
| 272 |
# * List "a" is made of tags which can be both inline or block-level. |
| 273 |
# These will be treated block-level when the start tag is alone on |
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# its line, otherwise they're not matched here and will be taken as |
| 275 |
# inline later. |
| 276 |
# * List "b" is made of tags which are always block-level; |
| 277 |
# |
| 278 |
$block_tags_a_re = 'ins|del'; |
| 279 |
$block_tags_b_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|'. |
| 280 |
'script|noscript|form|fieldset|iframe|math'; |
| 281 |
|
| 282 |
# Regular expression for the content of a block tag. |
| 283 |
$nested_tags_level = 4; |
| 284 |
$attr = ' |
| 285 |
(?> # optional tag attributes |
| 286 |
\s # starts with whitespace |
| 287 |
(?> |
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[^>"/]+ # text outside quotes |
| 289 |
| |
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/+(?!>) # slash not followed by ">" |
| 291 |
| |
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"[^"]*" # text inside double quotes (tolerate ">") |
| 293 |
| |
| 294 |
\'[^\']*\' # text inside single quotes (tolerate ">") |
| 295 |
)* |
| 296 |
)? |
| 297 |
'; |
| 298 |
$content = |
| 299 |
str_repeat(' |
| 300 |
(?> |
| 301 |
[^<]+ # content without tag |
| 302 |
| |
| 303 |
<\2 # nested opening tag |
| 304 |
'.$attr.' # attributes |
| 305 |
(?> |
| 306 |
/> |
| 307 |
| |
| 308 |
>', $nested_tags_level). # end of opening tag |
| 309 |
'.*?'. # last level nested tag content |
| 310 |
str_repeat(' |
| 311 |
</\2\s*> # closing nested tag |
| 312 |
) |
| 313 |
| |
| 314 |
<(?!/\2\s*> # other tags with a different name |
| 315 |
) |
| 316 |
)*', |
| 317 |
$nested_tags_level); |
| 318 |
$content2 = str_replace('\2', '\3', $content); |
| 319 |
|
| 320 |
# First, look for nested blocks, e.g.: |
| 321 |
# <div> |
| 322 |
# <div> |
| 323 |
# tags for inner block must be indented. |
| 324 |
# </div> |
| 325 |
# </div> |
| 326 |
# |
| 327 |
# The outermost tags must start at the left margin for this to match, and |
| 328 |
# the inner nested divs must be indented. |
| 329 |
# We need to do this before the next, more liberal match, because the next |
| 330 |
# match will start at the first `<div>` and stop at the first `</div>`. |
| 331 |
$text = preg_replace_callback('{(?> |
| 332 |
(?> |
| 333 |
(?<=\n\n) # Starting after a blank line |
| 334 |
| # or |
| 335 |
\A\n? # the beginning of the doc |
| 336 |
) |
| 337 |
( # save in $1 |
| 338 |
|
| 339 |
# Match from `\n<tag>` to `</tag>\n`, handling nested tags |
| 340 |
# in between. |
| 341 |
|
| 342 |
[ ]{0,'.$less_than_tab.'} |
| 343 |
<('.$block_tags_b_re.')# start tag = $2 |
| 344 |
'.$attr.'> # attributes followed by > and \n |
| 345 |
'.$content.' # content, support nesting |
| 346 |
</\2> # the matching end tag |
| 347 |
[ ]* # trailing spaces/tabs |
| 348 |
(?=\n+|\Z) # followed by a newline or end of document |
| 349 |
|
| 350 |
| # Special version for tags of group a. |
| 351 |
|
| 352 |
[ ]{0,'.$less_than_tab.'} |
| 353 |
<('.$block_tags_a_re.')# start tag = $3 |
| 354 |
'.$attr.'>[ ]*\n # attributes followed by > |
| 355 |
'.$content2.' # content, support nesting |
| 356 |
</\3> # the matching end tag |
| 357 |
[ ]* # trailing spaces/tabs |
| 358 |
(?=\n+|\Z) # followed by a newline or end of document |
| 359 |
|
| 360 |
| # Special case just for <hr />. It was easier to make a special |
| 361 |
# case than to make the other regex more complicated. |
| 362 |
|
| 363 |
[ ]{0,'.$less_than_tab.'} |
| 364 |
<(hr) # start tag = $2 |
| 365 |
'.$attr.' # attributes |
| 366 |
/?> # the matching end tag |
| 367 |
[ ]* |
| 368 |
(?=\n{2,}|\Z) # followed by a blank line or end of document |
| 369 |
|
| 370 |
| # Special case for standalone HTML comments: |
| 371 |
|
| 372 |
[ ]{0,'.$less_than_tab.'} |
| 373 |
(?s: |
| 374 |
<!-- .*? --> |
| 375 |
) |
| 376 |
[ ]* |
| 377 |
(?=\n{2,}|\Z) # followed by a blank line or end of document |
| 378 |
|
| 379 |
| # PHP and ASP-style processor instructions (<?php and <%) |
| 380 |
|
| 381 |
[ ]{0,'.$less_than_tab.'} |
| 382 |
(?s: |
| 383 |
<([?%]) # $2 |
| 384 |
.*? |
| 385 |
\2> |
| 386 |
) |
| 387 |
[ ]* |
| 388 |
(?=\n{2,}|\Z) # followed by a blank line or end of document |
| 389 |
|
| 390 |
) |
| 391 |
)}Sxmi', |
| 392 |
array(&$this, '_hashHTMLBlocks_callback'), |
| 393 |
$text); |
| 394 |
|
| 395 |
return $text; |
| 396 |
} |
| 397 |
function _hashHTMLBlocks_callback($matches) { |
| 398 |
$text = $matches[1]; |
| 399 |
$key = $this->hashBlock($text); |
| 400 |
return "\n\n$key\n\n"; |
| 401 |
} |
| 402 |
|
| 403 |
|
| 404 |
function hashPart($text, $boundary = 'X') { |
| 405 |
# |
| 406 |
# Called whenever a tag must be hashed when a function insert an atomic |
| 407 |
# element in the text stream. Passing $text to through this function gives |
| 408 |
# a unique text-token which will be reverted back when calling unhash. |
| 409 |
# |
| 410 |
# The $boundary argument specify what character should be used to surround |
| 411 |
# the token. By convension, "B" is used for block elements that needs not |
| 412 |
# to be wrapped into paragraph tags at the end, ":" is used for elements |
| 413 |
# that are word separators and "X" is used in the general case. |
| 414 |
# |
| 415 |
# Swap back any tag hash found in $text so we do not have to `unhash` |
| 416 |
# multiple times at the end. |
| 417 |
$text = $this->unhash($text); |
| 418 |
|
| 419 |
# Then hash the block. |
| 420 |
static $i = 0; |
| 421 |
$key = "$boundary\x1A" . ++$i . $boundary; |
| 422 |
$this->html_hashes[$key] = $text; |
| 423 |
return $key; # String that will replace the tag. |
| 424 |
} |
| 425 |
|
| 426 |
|
| 427 |
function hashBlock($text) { |
| 428 |
# |
| 429 |
# Shortcut function for hashPart with block-level boundaries. |
| 430 |
# |
| 431 |
return $this->hashPart($text, 'B'); |
| 432 |
} |
| 433 |
|
| 434 |
|
| 435 |
var $block_gamut = array( |
| 436 |
# |
| 437 |
# These are all the transformations that form block-level |
| 438 |
# tags like paragraphs, headers, and list items. |
| 439 |
# |
| 440 |
"doHeaders" => 10, |
| 441 |
"doHorizontalRules" => 20, |
| 442 |
|
| 443 |
"doLists" => 40, |
| 444 |
"doCodeBlocks" => 50, |
| 445 |
"doBlockQuotes" => 60, |
| 446 |
); |
| 447 |
|
| 448 |
function runBlockGamut($text) { |
| 449 |
# |
| 450 |
# Run block gamut tranformations. |
| 451 |
# |
| 452 |
# We need to escape raw HTML in Markdown source before doing anything |
| 453 |
# else. This need to be done for each block, and not only at the |
| 454 |
# begining in the Markdown function since hashed blocks can be part of |
| 455 |
# list items and could have been indented. Indented blocks would have |
| 456 |
# been seen as a code block in a previous pass of hashHTMLBlocks. |
| 457 |
$text = $this->hashHTMLBlocks($text); |
| 458 |
|
| 459 |
return $this->runBasicBlockGamut($text); |
| 460 |
} |
| 461 |
|
| 462 |
function runBasicBlockGamut($text) { |
| 463 |
# |
| 464 |
# Run block gamut tranformations, without hashing HTML blocks. This is |
| 465 |
# useful when HTML blocks are known to be already hashed, like in the first |
| 466 |
# whole-document pass. |
| 467 |
# |
| 468 |
foreach ($this->block_gamut as $method => $priority) { |
| 469 |
$text = $this->$method($text); |
| 470 |
} |
| 471 |
|
| 472 |
# Finally form paragraph and restore hashed blocks. |
| 473 |
$text = $this->formParagraphs($text); |
| 474 |
|
| 475 |
return $text; |
| 476 |
} |
| 477 |
|
| 478 |
|
| 479 |
function doHorizontalRules($text) { |
| 480 |
# Do Horizontal Rules: |
| 481 |
return preg_replace( |
| 482 |
'{ |
| 483 |
^[ ]{0,3} # Leading space |
| 484 |
([-*_]) # $1: First marker |
| 485 |
(?> # Repeated marker group |
| 486 |
[ ]{0,2} # Zero, one, or two spaces. |
| 487 |
\1 # Marker character |
| 488 |
){2,} # Group repeated at least twice |
| 489 |
[ ]* # Tailing spaces |
| 490 |
$ # End of line. |
| 491 |
}mx', |
| 492 |
"\n".$this->hashBlock("<hr$this->empty_element_suffix")."\n", |
| 493 |
$text); |
| 494 |
} |
| 495 |
|
| 496 |
|
| 497 |
var $span_gamut = array( |
| 498 |
# |
| 499 |
# These are all the transformations that occur *within* block-level |
| 500 |
# tags like paragraphs, headers, and list items. |
| 501 |
# |
| 502 |
# Process character escapes, code spans, and inline HTML |
| 503 |
# in one shot. |
| 504 |
"parseSpan" => -30, |
| 505 |
|
| 506 |
# Process anchor and image tags. Images must come first, |
| 507 |
# because ![foo][f] looks like an anchor. |
| 508 |
"doImages" => 10, |
| 509 |
"doAnchors" => 20, |
| 510 |
|
| 511 |
# Make links out of things like `<http://example.com/>` |
| 512 |
# Must come after doAnchors, because you can use < and > |
| 513 |
# delimiters in inline links like [this](<url>). |
| 514 |
"doAutoLinks" => 30, |
| 515 |
"encodeAmpsAndAngles" => 40, |
| 516 |
|
| 517 |
"doItalicsAndBold" => 50, |
| 518 |
"doHardBreaks" => 60, |
| 519 |
); |
| 520 |
|
| 521 |
function runSpanGamut($text) { |
| 522 |
# |
| 523 |
# Run span gamut tranformations. |
| 524 |
# |
| 525 |
foreach ($this->span_gamut as $method => $priority) { |
| 526 |
$text = $this->$method($text); |
| 527 |
} |
| 528 |
|
| 529 |
return $text; |
| 530 |
} |
| 531 |
|
| 532 |
|
| 533 |
function doHardBreaks($text) { |
| 534 |
# Do hard breaks: |
| 535 |
return preg_replace_callback('/ {2,}\n/', |
| 536 |
array(&$this, '_doHardBreaks_callback'), $text); |
| 537 |
} |
| 538 |
function _doHardBreaks_callback($matches) { |
| 539 |
return $this->hashPart("<br$this->empty_element_suffix\n"); |
| 540 |
} |
| 541 |
|
| 542 |
|
| 543 |
function doAnchors($text) { |
| 544 |
# |
| 545 |
# Turn Markdown link shortcuts into XHTML <a> tags. |
| 546 |
# |
| 547 |
if ($this->in_anchor) return $text; |
| 548 |
$this->in_anchor = true; |
| 549 |
|
| 550 |
# |
| 551 |
# First, handle reference-style links: [link text] [id] |
| 552 |
# |
| 553 |
$text = preg_replace_callback('{ |
| 554 |
( # wrap whole match in $1 |
| 555 |
\[ |
| 556 |
('.$this->nested_brackets_re.') # link text = $2 |
| 557 |
\] |
| 558 |
|
| 559 |
[ ]? # one optional space |
| 560 |
(?:\n[ ]*)? # one optional newline followed by spaces |
| 561 |
|
| 562 |
\[ |
| 563 |
(.*?) # id = $3 |
| 564 |
\] |
| 565 |
) |
| 566 |
}xs', |
| 567 |
array(&$this, '_doAnchors_reference_callback'), $text); |
| 568 |
|
| 569 |
# |
| 570 |
# Next, inline-style links: [link text](url "optional title") |
| 571 |
# |
| 572 |
$text = preg_replace_callback('{ |
| 573 |
( # wrap whole match in $1 |
| 574 |
\[ |
| 575 |
('.$this->nested_brackets_re.') # link text = $2 |
| 576 |
\] |
| 577 |
\( # literal paren |
| 578 |
[ \n]* |
| 579 |
(?: |
| 580 |
<(.+?)> # href = $3 |
| 581 |
| |
| 582 |
('.$this->nested_url_parenthesis_re.') # href = $4 |
| 583 |
) |
| 584 |
[ \n]* |
| 585 |
( # $5 |
| 586 |
([\'"]) # quote char = $6 |
| 587 |
(.*?) # Title = $7 |
| 588 |
\6 # matching quote |
| 589 |
[ \n]* # ignore any spaces/tabs between closing quote and ) |
| 590 |
)? # title is optional |
| 591 |
\) |
| 592 |
) |
| 593 |
}xs', |
| 594 |
array(&$this, '_doAnchors_inline_callback'), $text); |
| 595 |
|
| 596 |
# |
| 597 |
# Last, handle reference-style shortcuts: [link text] |
| 598 |
# These must come last in case you've also got [link text][1] |
| 599 |
# or [link text](/foo) |
| 600 |
# |
| 601 |
$text = preg_replace_callback('{ |
| 602 |
( # wrap whole match in $1 |
| 603 |
\[ |
| 604 |
([^\[\]]+) # link text = $2; can\'t contain [ or ] |
| 605 |
\] |
| 606 |
) |
| 607 |
}xs', |
| 608 |
array(&$this, '_doAnchors_reference_callback'), $text); |
| 609 |
|
| 610 |
$this->in_anchor = false; |
| 611 |
return $text; |
| 612 |
} |
| 613 |
function _doAnchors_reference_callback($matches) { |
| 614 |
$whole_match = $matches[1]; |
| 615 |
$link_text = $matches[2]; |
| 616 |
$link_id =& $matches[3]; |
| 617 |
|
| 618 |
if ($link_id == "") { |
| 619 |
# for shortcut links like [this][] or [this]. |
| 620 |
$link_id = $link_text; |
| 621 |
} |
| 622 |
|
| 623 |
# lower-case and turn embedded newlines into spaces |
| 624 |
$link_id = strtolower($link_id); |
| 625 |
$link_id = preg_replace('{[ ]?\n}', ' ', $link_id); |
| 626 |
|
| 627 |
if (isset($this->urls[$link_id])) { |
| 628 |
$url = $this->urls[$link_id]; |
| 629 |
$url = $this->encodeAttribute($url); |
| 630 |
|
| 631 |
$result = "<a href=\"$url\""; |
| 632 |
if ( isset( $this->titles[$link_id] ) ) { |
| 633 |
$title = $this->titles[$link_id]; |
| 634 |
$title = $this->encodeAttribute($title); |
| 635 |
$result .= " title=\"$title\""; |
| 636 |
} |
| 637 |
|
| 638 |
$link_text = $this->runSpanGamut($link_text); |
| 639 |
$result .= ">$link_text</a>"; |
| 640 |
$result = $this->hashPart($result); |
| 641 |
} |
| 642 |
else { |
| 643 |
$result = $whole_match; |
| 644 |
} |
| 645 |
return $result; |
| 646 |
} |
| 647 |
function _doAnchors_inline_callback($matches) { |
| 648 |
$whole_match = $matches[1]; |
| 649 |
$link_text = $this->runSpanGamut($matches[2]); |
| 650 |
$url = $matches[3] == '' ? $matches[4] : $matches[3]; |
| 651 |
$title =& $matches[7]; |
| 652 |
|
| 653 |
$url = $this->encodeAttribute($url); |
| 654 |
|
| 655 |
$result = "<a href=\"$url\""; |
| 656 |
if (isset($title)) { |
| 657 |
$title = $this->encodeAttribute($title); |
| 658 |
$result .= " title=\"$title\""; |
| 659 |
} |
| 660 |
|
| 661 |
$link_text = $this->runSpanGamut($link_text); |
| 662 |
$result .= ">$link_text</a>"; |
| 663 |
|
| 664 |
return $this->hashPart($result); |
| 665 |
} |
| 666 |
|
| 667 |
|
| 668 |
function doImages($text) { |
| 669 |
# |
| 670 |
# Turn Markdown image shortcuts into <img> tags. |
| 671 |
# |
| 672 |
# |
| 673 |
# First, handle reference-style labeled images: ![alt text][id] |
| 674 |
# |
| 675 |
$text = preg_replace_callback('{ |
| 676 |
( # wrap whole match in $1 |
| 677 |
!\[ |
| 678 |
('.$this->nested_brackets_re.') # alt text = $2 |
| 679 |
\] |
| 680 |
|
| 681 |
[ ]? # one optional space |
| 682 |
(?:\n[ ]*)? # one optional newline followed by spaces |
| 683 |
|
| 684 |
\[ |
| 685 |
(.*?) # id = $3 |
| 686 |
\] |
| 687 |
|
| 688 |
) |
| 689 |
}xs', |
| 690 |
array(&$this, '_doImages_reference_callback'), $text); |
| 691 |
|
| 692 |
# |
| 693 |
# Next, handle inline images:  |
| 694 |
# Don't forget: encode * and _ |
| 695 |
# |
| 696 |
$text = preg_replace_callback('{ |
| 697 |
( # wrap whole match in $1 |
| 698 |
!\[ |
| 699 |
('.$this->nested_brackets_re.') # alt text = $2 |
| 700 |
\] |
| 701 |
\s? # One optional whitespace character |
| 702 |
\( # literal paren |
| 703 |
[ \n]* |
| 704 |
(?: |
| 705 |
<(\S*)> # src url = $3 |
| 706 |
| |
| 707 |
('.$this->nested_url_parenthesis_re.') # src url = $4 |
| 708 |
) |
| 709 |
[ \n]* |
| 710 |
( # $5 |
| 711 |
([\'"]) # quote char = $6 |
| 712 |
(.*?) # title = $7 |
| 713 |
\6 # matching quote |
| 714 |
[ \n]* |
| 715 |
)? # title is optional |
| 716 |
\) |
| 717 |
) |
| 718 |
}xs', |
| 719 |
array(&$this, '_doImages_inline_callback'), $text); |
| 720 |
|
| 721 |
return $text; |
| 722 |
} |
| 723 |
function _doImages_reference_callback($matches) { |
| 724 |
$whole_match = $matches[1]; |
| 725 |
$alt_text = $matches[2]; |
| 726 |
$link_id = strtolower($matches[3]); |
| 727 |
|
| 728 |
if ($link_id == "") { |
| 729 |
$link_id = strtolower($alt_text); # for shortcut links like ![this][]. |
| 730 |
} |
| 731 |
|
| 732 |
$alt_text = $this->encodeAttribute($alt_text); |
| 733 |
if (isset($this->urls[$link_id])) { |
| 734 |
$url = $this->encodeAttribute($this->urls[$link_id]); |
| 735 |
$result = "<img src=\"$url\" alt=\"$alt_text\""; |
| 736 |
if (isset($this->titles[$link_id])) { |
| 737 |
$title = $this->titles[$link_id]; |
| 738 |
$title = $this->encodeAttribute($title); |
| 739 |
$result .= " title=\"$title\""; |
| 740 |
} |
| 741 |
$result .= $this->empty_element_suffix; |
| 742 |
$result = $this->hashPart($result); |
| 743 |
} |
| 744 |
else { |
| 745 |
# If there's no such link ID, leave intact: |
| 746 |
$result = $whole_match; |
| 747 |
} |
| 748 |
|
| 749 |
return $result; |
| 750 |
} |
| 751 |
function _doImages_inline_callback($matches) { |
| 752 |
$whole_match = $matches[1]; |
| 753 |
$alt_text = $matches[2]; |
| 754 |
$url = $matches[3] == '' ? $matches[4] : $matches[3]; |
| 755 |
$title =& $matches[7]; |
| 756 |
|
| 757 |
$alt_text = $this->encodeAttribute($alt_text); |
| 758 |
$url = $this->encodeAttribute($url); |
| 759 |
$result = "<img src=\"$url\" alt=\"$alt_text\""; |
| 760 |
if (isset($title)) { |
| 761 |
$title = $this->encodeAttribute($title); |
| 762 |
$result .= " title=\"$title\""; # $title already quoted |
| 763 |
} |
| 764 |
$result .= $this->empty_element_suffix; |
| 765 |
|
| 766 |
return $this->hashPart($result); |
| 767 |
} |
| 768 |
|
| 769 |
|
| 770 |
function doHeaders($text) { |
| 771 |
# Setext-style headers: |
| 772 |
# Header 1 |
| 773 |
# ======== |
| 774 |
# |
| 775 |
# Header 2 |
| 776 |
# -------- |
| 777 |
# |
| 778 |
$text = preg_replace_callback('{ ^(.+?)[ ]*\n(=+|-+)[ ]*\n+ }mx', |
| 779 |
array(&$this, '_doHeaders_callback_setext'), $text); |
| 780 |
|
| 781 |
# atx-style headers: |
| 782 |
# # Header 1 |
| 783 |
# ## Header 2 |
| 784 |
# ## Header 2 with closing hashes ## |
| 785 |
# ... |
| 786 |
# ###### Header 6 |
| 787 |
# |
| 788 |
$text = preg_replace_callback('{ |
| 789 |
^(\#{1,6}) # $1 = string of #\'s |
| 790 |
[ ]* |
| 791 |
(.+?) # $2 = Header text |
| 792 |
[ ]* |
| 793 |
\#* # optional closing #\'s (not counted) |
| 794 |
\n+ |
| 795 |
}xm', |
| 796 |
array(&$this, '_doHeaders_callback_atx'), $text); |
| 797 |
|
| 798 |
return $text; |
| 799 |
} |
| 800 |
function _doHeaders_callback_setext($matches) { |
| 801 |
# Terrible hack to check we haven't found an empty list item. |
| 802 |
if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1])) |
| 803 |
return $matches[0]; |
| 804 |
|
| 805 |
$level = $matches[2]{0} == '=' ? 1 : 2; |
| 806 |
$block = "<h$level>".$this->runSpanGamut($matches[1])."</h$level>"; |
| 807 |
return "\n" . $this->hashBlock($block) . "\n\n"; |
| 808 |
} |
| 809 |
function _doHeaders_callback_atx($matches) { |
| 810 |
$level = strlen($matches[1]); |
| 811 |
$block = "<h$level>".$this->runSpanGamut($matches[2])."</h$level>"; |
| 812 |
return "\n" . $this->hashBlock($block) . "\n\n"; |
| 813 |
} |
| 814 |
|
| 815 |
|
| 816 |
function doLists($text) { |
| 817 |
# |
| 818 |
# Form HTML ordered (numbered) and unordered (bulleted) lists. |
| 819 |
# |
| 820 |
$less_than_tab = $this->tab_width - 1; |
| 821 |
|
| 822 |
# Re-usable patterns to match list item bullets and number markers: |
| 823 |
$marker_ul_re = '[*+-]'; |
| 824 |
$marker_ol_re = '\d+[\.]'; |
| 825 |
$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)"; |
| 826 |
|
| 827 |
$markers_relist = array( |
| 828 |
$marker_ul_re => $marker_ol_re, |
| 829 |
$marker_ol_re => $marker_ul_re, |
| 830 |
); |
| 831 |
|
| 832 |
foreach ($markers_relist as $marker_re => $other_marker_re) { |
| 833 |
# Re-usable pattern to match any entirel ul or ol list: |
| 834 |
$whole_list_re = ' |
| 835 |
( # $1 = whole list |
| 836 |
( # $2 |
| 837 |
([ ]{0,'.$less_than_tab.'}) # $3 = number of spaces |
| 838 |
('.$marker_re.') # $4 = first list item marker |
| 839 |
[ ]+ |
| 840 |
) |
| 841 |
(?s:.+?) |
| 842 |
( # $5 |
| 843 |
\z |
| 844 |
| |
| 845 |
\n{2,} |
| 846 |
(?=\S) |
| 847 |
(?! # Negative lookahead for another list item marker |
| 848 |
[ ]* |
| 849 |
'.$marker_re.'[ ]+ |
| 850 |
) |
| 851 |
| |
| 852 |
(?= # Lookahead for another kind of list |
| 853 |
\n |
| 854 |
\3 # Must have the same indentation |
| 855 |
'.$other_marker_re.'[ ]+ |
| 856 |
) |
| 857 |
) |
| 858 |
) |
| 859 |
'; // mx |
| 860 |
|
| 861 |
# We use a different prefix before nested lists than top-level lists. |
| 862 |
# See extended comment in _ProcessListItems(). |
| 863 |
|
| 864 |
if ($this->list_level) { |
| 865 |
$text = preg_replace_callback('{ |
| 866 |
^ |
| 867 |
'.$whole_list_re.' |
| 868 |
}mx', |
| 869 |
array(&$this, '_doLists_callback'), $text); |
| 870 |
} |
| 871 |
else { |
| 872 |
$text = preg_replace_callback('{ |
| 873 |
(?:(?<=\n)\n|\A\n?) # Must eat the newline |
| 874 |
'.$whole_list_re.' |
| 875 |
}mx', |
| 876 |
array(&$this, '_doLists_callback'), $text); |
| 877 |
} |
| 878 |
} |
| 879 |
|
| 880 |
return $text; |
| 881 |
} |
| 882 |
function _doLists_callback($matches) { |
| 883 |
# Re-usable patterns to match list item bullets and number markers: |
| 884 |
$marker_ul_re = '[*+-]'; |
| 885 |
$marker_ol_re = '\d+[\.]'; |
| 886 |
$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)"; |
| 887 |
|
| 888 |
$list = $matches[1]; |
| 889 |
$list_type = preg_match("/$marker_ul_re/", $matches[4]) ? "ul" : "ol"; |
| 890 |
|
| 891 |
$marker_any_re = ( $list_type == "ul" ? $marker_ul_re : $marker_ol_re ); |
| 892 |
|
| 893 |
$list .= "\n"; |
| 894 |
$result = $this->processListItems($list, $marker_any_re); |
| 895 |
|
| 896 |
$result = $this->hashBlock("<$list_type>\n" . $result . "</$list_type>"); |
| 897 |
return "\n". $result ."\n\n"; |
| 898 |
} |
| 899 |
|
| 900 |
var $list_level = 0; |
| 901 |
|
| 902 |
function processListItems($list_str, $marker_any_re) { |
| 903 |
# |
| 904 |
# Process the contents of a single ordered or unordered list, splitting it |
| 905 |
# into individual list items. |
| 906 |
# |
| 907 |
# The $this->list_level global keeps track of when we're inside a list. |
| 908 |
# Each time we enter a list, we increment it; when we leave a list, |
| 909 |
# we decrement. If it's zero, we're not in a list anymore. |
| 910 |
# |
| 911 |
# We do this because when we're not inside a list, we want to treat |
| 912 |
# something like this: |
| 913 |
# |
| 914 |
# I recommend upgrading to version |
| 915 |
# 8. Oops, now this line is treated |
| 916 |
# as a sub-list. |
| 917 |
# |
| 918 |
# As a single paragraph, despite the fact that the second line starts |
| 919 |
# with a digit-period-space sequence. |
| 920 |
# |
| 921 |
# Whereas when we're inside a list (or sub-list), that line will be |
| 922 |
# treated as the start of a sub-list. What a kludge, huh? This is |
| 923 |
# an aspect of Markdown's syntax that's hard to parse perfectly |
| 924 |
# without resorting to mind-reading. Perhaps the solution is to |
| 925 |
# change the syntax rules such that sub-lists must start with a |
| 926 |
# starting cardinal number; e.g. "1." or "a.". |
| 927 |
|
| 928 |
$this->list_level++; |
| 929 |
|
| 930 |
# trim trailing blank lines: |
| 931 |
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str); |
| 932 |
|
| 933 |
$list_str = preg_replace_callback('{ |
| 934 |
(\n)? # leading line = $1 |
| 935 |
(^[ ]*) # leading whitespace = $2 |
| 936 |
('.$marker_any_re.' # list marker and space = $3 |
| 937 |
(?:[ ]+|(?=\n)) # space only required if item is not empty |
| 938 |
) |
| 939 |
((?s:.*?)) # list item text = $4 |
| 940 |
(?:(\n+(?=\n))|\n) # tailing blank line = $5 |
| 941 |
(?= \n* (\z | \2 ('.$marker_any_re.') (?:[ ]+|(?=\n)))) |
| 942 |
}xm', |
| 943 |
array(&$this, '_processListItems_callback'), $list_str); |
| 944 |
|
| 945 |
$this->list_level--; |
| 946 |
return $list_str; |
| 947 |
} |
| 948 |
function _processListItems_callback($matches) { |
| 949 |
$item = $matches[4]; |
| 950 |
$leading_line =& $matches[1]; |
| 951 |
$leading_space =& $matches[2]; |
| 952 |
$marker_space = $matches[3]; |
| 953 |
$tailing_blank_line =& $matches[5]; |
| 954 |
|
| 955 |
if ($leading_line || $tailing_blank_line || |
| 956 |
preg_match('/\n{2,}/', $item)) |
| 957 |
{ |
| 958 |
# Replace marker with the appropriate whitespace indentation |
| 959 |
$item = $leading_space . str_repeat(' ', strlen($marker_space)) . $item; |
| 960 |
$item = $this->runBlockGamut($this->outdent($item)."\n"); |
| 961 |
} |
| 962 |
else { |
| 963 |
# Recursion for sub-lists: |
| 964 |
$item = $this->doLists($this->outdent($item)); |
| 965 |
$item = preg_replace('/\n+$/', '', $item); |
| 966 |
$item = $this->runSpanGamut($item); |
| 967 |
} |
| 968 |
|
| 969 |
return "<li>" . $item . "</li>\n"; |
| 970 |
} |
| 971 |
|
| 972 |
|
| 973 |
function doCodeBlocks($text) { |
| 974 |
# |
| 975 |
# Process Markdown `<pre><code>` blocks. |
| 976 |
# |
| 977 |
$text = preg_replace_callback('{ |
| 978 |
(?:\n\n|\A\n?) |
| 979 |
( # $1 = the code block -- one or more lines, starting with a space/tab |
| 980 |
(?> |
| 981 |
[ ]{'.$this->tab_width.'} # Lines must start with a tab or a tab-width of spaces |
| 982 |
.*\n+ |
| 983 |
)+ |
| 984 |
) |
| 985 |
((?=^[ ]{0,'.$this->tab_width.'}\S)|\Z) # Lookahead for non-space at line-start, or end of doc |
| 986 |
}xm', |
| 987 |
array(&$this, '_doCodeBlocks_callback'), $text); |
| 988 |
|
| 989 |
return $text; |
| 990 |
} |
| 991 |
function _doCodeBlocks_callback($matches) { |
| 992 |
$codeblock = $matches[1]; |
| 993 |
|
| 994 |
$codeblock = $this->outdent($codeblock); |
| 995 |
$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES); |
| 996 |
|
| 997 |
# trim leading newlines and trailing newlines |
| 998 |
$codeblock = preg_replace('/\A\n+|\n+\z/', '', $codeblock); |
| 999 |
|
| 1000 |
$codeblock = "<pre><code>$codeblock\n</code></pre>"; |
| 1001 |
return "\n\n".$this->hashBlock($codeblock)."\n\n"; |
| 1002 |
} |
| 1003 |
|
| 1004 |
|
| 1005 |
function makeCodeSpan($code) { |
| 1006 |
# |
| 1007 |
# Create a code span markup for $code. Called from handleSpanToken. |
| 1008 |
# |
| 1009 |
$code = htmlspecialchars(trim($code), ENT_NOQUOTES); |
| 1010 |
return $this->hashPart("<code>$code</code>"); |
| 1011 |
} |
| 1012 |
|
| 1013 |
|
| 1014 |
var $em_relist = array( |
| 1015 |
'' => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?=\S|$)(?![\.,:;]\s)', |
| 1016 |
'*' => '(?<=\S|^)(?<!\*)\*(?!\*)', |
| 1017 |
'_' => '(?<=\S|^)(?<!_)_(?!_)', |
| 1018 |
); |
| 1019 |
var $strong_relist = array( |
| 1020 |
'' => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?=\S|$)(?![\.,:;]\s)', |
| 1021 |
'**' => '(?<=\S|^)(?<!\*)\*\*(?!\*)', |
| 1022 |
'__' => '(?<=\S|^)(?<!_)__(?!_)', |
| 1023 |
); |
| 1024 |
var $em_strong_relist = array( |
| 1025 |
'' => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?=\S|$)(?![\.,:;]\s)', |
| 1026 |
'***' => '(?<=\S|^)(?<!\*)\*\*\*(?!\*)', |
| 1027 |
'___' => '(?<=\S|^)(?<!_)___(?!_)', |
| 1028 |
); |
| 1029 |
var $em_strong_prepared_relist; |
| 1030 |
|
| 1031 |
function prepareItalicsAndBold() { |
| 1032 |
# |
| 1033 |
# Prepare regular expressions for searching emphasis tokens in any |
| 1034 |
# context. |
| 1035 |
# |
| 1036 |
foreach ($this->em_relist as $em => $em_re) { |
| 1037 |
foreach ($this->strong_relist as $strong => $strong_re) { |
| 1038 |
# Construct list of allowed token expressions. |
| 1039 |
$token_relist = array(); |
| 1040 |
if (isset($this->em_strong_relist["$em$strong"])) { |
| 1041 |
$token_relist[] = $this->em_strong_relist["$em$strong"]; |
| 1042 |
} |
| 1043 |
$token_relist[] = $em_re; |
| 1044 |
$token_relist[] = $strong_re; |
| 1045 |
|
| 1046 |
# Construct master expression from list. |
| 1047 |
$token_re = '{('. implode('|', $token_relist) .')}'; |
| 1048 |
$this->em_strong_prepared_relist["$em$strong"] = $token_re; |
| 1049 |
} |
| 1050 |
} |
| 1051 |
} |
| 1052 |
|
| 1053 |
function doItalicsAndBold($text) { |
| 1054 |
$token_stack = array(''); |
| 1055 |
$text_stack = array(''); |
| 1056 |
$em = ''; |
| 1057 |
$strong = ''; |
| 1058 |
$tree_char_em = false; |
| 1059 |
|
| 1060 |
while (1) { |
| 1061 |
# |
| 1062 |
# Get prepared regular expression for seraching emphasis tokens |
| 1063 |
# in current context. |
| 1064 |
# |
| 1065 |
$token_re = $this->em_strong_prepared_relist["$em$strong"]; |
| 1066 |
|
| 1067 |
# |
| 1068 |
# Each loop iteration search for the next emphasis token. |
| 1069 |
# Each token is then passed to handleSpanToken. |
| 1070 |
# |
| 1071 |
$parts = preg_split($token_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE); |
| 1072 |
$text_stack[0] .= $parts[0]; |
| 1073 |
$token =& $parts[1]; |
| 1074 |
$text =& $parts[2]; |
| 1075 |
|
| 1076 |
if (empty($token)) { |
| 1077 |
# Reached end of text span: empty stack without emitting. |
| 1078 |
# any more emphasis. |
| 1079 |
while ($token_stack[0]) { |
| 1080 |
$text_stack[1] .= array_shift($token_stack); |
| 1081 |
$text_stack[0] .= array_shift($text_stack); |
| 1082 |
} |
| 1083 |
break; |
| 1084 |
} |
| 1085 |
|
| 1086 |
$token_len = strlen($token); |
| 1087 |
if ($tree_char_em) { |
| 1088 |
# Reached closing marker while inside a three-char emphasis. |
| 1089 |
if ($token_len == 3) { |
| 1090 |
# Three-char closing marker, close em and strong. |
| 1091 |
array_shift($token_stack); |
| 1092 |
$span = array_shift($text_stack); |
| 1093 |
$span = $this->runSpanGamut($span); |
| 1094 |
$span = "<strong><em>$span</em></strong>"; |
| 1095 |
$text_stack[0] .= $this->hashPart($span); |
| 1096 |
$em = ''; |
| 1097 |
$strong = ''; |
| 1098 |
} else { |
| 1099 |
# Other closing marker: close one em or strong and |
| 1100 |
# change current token state to match the other |
| 1101 |
$token_stack[0] = str_repeat($token{0}, 3-$token_len); |
| 1102 |
$tag = $token_len == 2 ? "strong" : "em"; |
| 1103 |
$span = $text_stack[0]; |
| 1104 |
$span = $this->runSpanGamut($span); |
| 1105 |
$span = "<$tag>$span</$tag>"; |
| 1106 |
$text_stack[0] = $this->hashPart($span); |
| 1107 |
$$tag = ''; # $$tag stands for $em or $strong |
| 1108 |
} |
| 1109 |
$tree_char_em = false; |
| 1110 |
} else if ($token_len == 3) { |
| 1111 |
if ($em) { |
| 1112 |
# Reached closing marker for both em and strong. |
| 1113 |
# Closing strong marker: |
| 1114 |
for ($i = 0; $i < 2; ++$i) { |
| 1115 |
$shifted_token = array_shift($token_stack); |
| 1116 |
$tag = strlen($shifted_token) == 2 ? "strong" : "em"; |
| 1117 |
$span = array_shift($text_stack); |
| 1118 |
$span = $this->runSpanGamut($span); |
| 1119 |
$span = "<$tag>$span</$tag>"; |
| 1120 |
$text_stack[0] .= $this->hashPart($span); |
| 1121 |
$$tag = ''; # $$tag stands for $em or $strong |
| 1122 |
} |
| 1123 |
} else { |
| 1124 |
# Reached opening three-char emphasis marker. Push on token |
| 1125 |
# stack; will be handled by the special condition above. |
| 1126 |
$em = $token{0}; |
| 1127 |
$strong = "$em$em"; |
| 1128 |
array_unshift($token_stack, $token); |
| 1129 |
array_unshift($text_stack, ''); |
| 1130 |
$tree_char_em = true; |
| 1131 |
} |
| 1132 |
} else if ($token_len == 2) { |
| 1133 |
if ($strong) { |
| 1134 |
# Unwind any dangling emphasis marker: |
| 1135 |
if (strlen($token_stack[0]) == 1) { |
| 1136 |
$text_stack[1] .= array_shift($token_stack); |
| 1137 |
$text_stack[0] .= array_shift($text_stack); |
| 1138 |
} |
| 1139 |
# Closing strong marker: |
| 1140 |
array_shift($token_stack); |
| 1141 |
$span = array_shift($text_stack); |
| 1142 |
$span = $this->runSpanGamut($span); |
| 1143 |
$span = "<strong>$span</strong>"; |
| 1144 |
$text_stack[0] .= $this->hashPart($span); |
| 1145 |
$strong = ''; |
| 1146 |
} else { |
| 1147 |
array_unshift($token_stack, $token); |
| 1148 |
array_unshift($text_stack, ''); |
| 1149 |
$strong = $token; |
| 1150 |
} |
| 1151 |
} else { |
| 1152 |
# Here $token_len == 1 |
| 1153 |
if ($em) { |
| 1154 |
if (strlen($token_stack[0]) == 1) { |
| 1155 |
# Closing emphasis marker: |
| 1156 |
array_shift($token_stack); |
| 1157 |
$span = array_shift($text_stack); |
| 1158 |
$span = $this->runSpanGamut($span); |
| 1159 |
$span = "<em>$span</em>"; |
| 1160 |
$text_stack[0] .= $this->hashPart($span); |
| 1161 |
$em = ''; |
| 1162 |
} else { |
| 1163 |
$text_stack[0] .= $token; |
| 1164 |
} |
| 1165 |
} else { |
| 1166 |
array_unshift($token_stack, $token); |
| 1167 |
array_unshift($text_stack, ''); |
| 1168 |
$em = $token; |
| 1169 |
} |
| 1170 |
} |
| 1171 |
} |
| 1172 |
return $text_stack[0]; |
| 1173 |
} |
| 1174 |
|
| 1175 |
|
| 1176 |
function doBlockQuotes($text) { |
| 1177 |
$text = preg_replace_callback('/ |
| 1178 |
( # Wrap whole match in $1 |
| 1179 |
(?> |
| 1180 |
^[ ]*>[ ]? # ">" at the start of a line |
| 1181 |
.+\n # rest of the first line |
| 1182 |
(.+\n)* # subsequent consecutive lines |
| 1183 |
\n* # blanks |
| 1184 |
)+ |
| 1185 |
) |
| 1186 |
/xm', |
| 1187 |
array(&$this, '_doBlockQuotes_callback'), $text); |
| 1188 |
|
| 1189 |
return $text; |
| 1190 |
} |
| 1191 |
function _doBlockQuotes_callback($matches) { |
| 1192 |
$bq = $matches[1]; |
| 1193 |
# trim one level of quoting - trim whitespace-only lines |
| 1194 |
$bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq); |
| 1195 |
$bq = $this->runBlockGamut($bq); # recurse |
| 1196 |
|
| 1197 |
$bq = preg_replace('/^/m', " ", $bq); |
| 1198 |
# These leading spaces cause problem with <pre> content, |
| 1199 |
# so we need to fix that: |
| 1200 |
$bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx', |
| 1201 |
array(&$this, '_doBlockQuotes_callback2'), $bq); |
| 1202 |
|
| 1203 |
return "\n". $this->hashBlock("<blockquote>\n$bq\n</blockquote>")."\n\n"; |
| 1204 |
} |
| 1205 |
function _doBlockQuotes_callback2($matches) { |
| 1206 |
$pre = $matches[1]; |
| 1207 |
$pre = preg_replace('/^ /m', '', $pre); |
| 1208 |
return $pre; |
| 1209 |
} |
| 1210 |
|
| 1211 |
|
| 1212 |
function formParagraphs($text) { |
| 1213 |
# |
| 1214 |
# Params: |
| 1215 |
# $text - string to process with html <p> tags |
| 1216 |
# |
| 1217 |
# Strip leading and trailing lines: |
| 1218 |
$text = preg_replace('/\A\n+|\n+\z/', '', $text); |
| 1219 |
|
| 1220 |
$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY); |
| 1221 |
|
| 1222 |
# |
| 1223 |
# Wrap <p> tags and unhashify HTML blocks |
| 1224 |
# |
| 1225 |
foreach ($grafs as $key => $value) { |
| 1226 |
if (!preg_match('/^B\x1A[0-9]+B$/', $value)) { |
| 1227 |
# Is a paragraph. |
| 1228 |
$value = $this->runSpanGamut($value); |
| 1229 |
$value = preg_replace('/^([ ]*)/', "<p>", $value); |
| 1230 |
$value .= "</p>"; |
| 1231 |
$grafs[$key] = $this->unhash($value); |
| 1232 |
} |
| 1233 |
else { |
| 1234 |
# Is a block. |
| 1235 |
# Modify elements of @grafs in-place... |
| 1236 |
$graf = $value; |
| 1237 |
$block = $this->html_hashes[$graf]; |
| 1238 |
$graf = $block; |
| 1239 |
// if (preg_match('{ |
| 1240 |
// \A |
| 1241 |
// ( # $1 = <div> tag |
| 1242 |
// <div \s+ |
| 1243 |
// [^>]* |
| 1244 |
// \b |
| 1245 |
// markdown\s*=\s* ([\'"]) # $2 = attr quote char |
| 1246 |
// 1 |
| 1247 |
// \2 |
| 1248 |
// [^>]* |
| 1249 |
// > |
| 1250 |
// ) |
| 1251 |
// ( # $3 = contents |
| 1252 |
// .* |
| 1253 |
// ) |
| 1254 |
// (</div>) # $4 = closing tag |
| 1255 |
// \z |
| 1256 |
// }xs', $block, $matches)) |
| 1257 |
// { |
| 1258 |
// list(, $div_open, , $div_content, $div_close) = $matches; |
| 1259 |
// |
| 1260 |
// # We can't call Markdown(), because that resets the hash; |
| 1261 |
// # that initialization code should be pulled into its own sub, though. |
| 1262 |
// $div_content = $this->hashHTMLBlocks($div_content); |
| 1263 |
// |
| 1264 |
// # Run document gamut methods on the content. |
| 1265 |
// foreach ($this->document_gamut as $method => $priority) { |
| 1266 |
// $div_content = $this->$method($div_content); |
| 1267 |
// } |
| 1268 |
// |
| 1269 |
// $div_open = preg_replace( |
| 1270 |
// '{\smarkdown\s*=\s*([\'"]).+?\1}', '', $div_open); |
| 1271 |
// |
| 1272 |
// $graf = $div_open . "\n" . $div_content . "\n" . $div_close; |
| 1273 |
// } |
| 1274 |
$grafs[$key] = $graf; |
| 1275 |
} |
| 1276 |
} |
| 1277 |
|
| 1278 |
return implode("\n\n", $grafs); |
| 1279 |
} |
| 1280 |
|
| 1281 |
|
| 1282 |
function encodeAttribute($text) { |
| 1283 |
# |
| 1284 |
# Encode text for a double-quoted HTML attribute. This function |
| 1285 |
# is *not* suitable for attributes enclosed in single quotes. |
| 1286 |
# |
| 1287 |
$text = $this->encodeAmpsAndAngles($text); |
| 1288 |
$text = str_replace('"', '"', $text); |
| 1289 |
return $text; |
| 1290 |
} |
| 1291 |
|
| 1292 |
|
| 1293 |
function encodeAmpsAndAngles($text) { |
| 1294 |
# |
| 1295 |
# Smart processing for ampersands and angle brackets that need to |
| 1296 |
# be encoded. Valid character entities are left alone unless the |
| 1297 |
# no-entities mode is set. |
| 1298 |
# |
| 1299 |
if ($this->no_entities) { |
| 1300 |
$text = str_replace('&', '&', $text); |
| 1301 |
} else { |
| 1302 |
# Ampersand-encoding based entirely on Nat Irons's Amputator |
| 1303 |
# MT plugin: <http://bumppo.net/projects/amputator/> |
| 1304 |
$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/', |
| 1305 |
'&', $text);; |
| 1306 |
} |
| 1307 |
# Encode remaining <'s |
| 1308 |
$text = str_replace('<', '<', $text); |
| 1309 |
|
| 1310 |
return $text; |
| 1311 |
} |
| 1312 |
|
| 1313 |
|
| 1314 |
function doAutoLinks($text) { |
| 1315 |
$text = preg_replace_callback('{<((https?|ftp|dict):[^\'">\s]+)>}i', |
| 1316 |
array(&$this, '_doAutoLinks_url_callback'), $text); |
| 1317 |
|
| 1318 |
# Email addresses: <address@domain.foo> |
| 1319 |
$text = preg_replace_callback('{ |
| 1320 |
< |
| 1321 |
(?:mailto:)? |
| 1322 |
( |
| 1323 |
(?: |
| 1324 |
[-!#$%&\'*+/=?^_`.{|}~\w\x80-\xFF]+ |
| 1325 |
| |
| 1326 |
".*?" |
| 1327 |
) |
| 1328 |
\@ |
| 1329 |
(?: |
| 1330 |
[-a-z0-9\x80-\xFF]+(\.[-a-z0-9\x80-\xFF]+)*\.[a-z]+ |
| 1331 |
| |
| 1332 |
\[[\d.a-fA-F:]+\] # IPv4 & IPv6 |
| 1333 |
) |
| 1334 |
) |
| 1335 |
> |
| 1336 |
}xi', |
| 1337 |
array(&$this, '_doAutoLinks_email_callback'), $text); |
| 1338 |
|
| 1339 |
return $text; |
| 1340 |
} |
| 1341 |
function _doAutoLinks_url_callback($matches) { |
| 1342 |
$url = $this->encodeAttribute($matches[1]); |
| 1343 |
$link = "<a href=\"$url\">$url</a>"; |
| 1344 |
return $this->hashPart($link); |
| 1345 |
} |
| 1346 |
function _doAutoLinks_email_callback($matches) { |
| 1347 |
$address = $matches[1]; |
| 1348 |
$link = $this->encodeEmailAddress($address); |
| 1349 |
return $this->hashPart($link); |
| 1350 |
} |
| 1351 |
|
| 1352 |
|
| 1353 |
function encodeEmailAddress($addr) { |
| 1354 |
# |
| 1355 |
# Input: an email address, e.g. "foo@example.com" |
| 1356 |
# |
| 1357 |
# Output: the email address as a mailto link, with each character |
| 1358 |
# of the address encoded as either a decimal or hex entity, in |
| 1359 |
# the hopes of foiling most address harvesting spam bots. E.g.: |
| 1360 |
# |
| 1361 |
# <p><a href="mailto:foo |
| 1362 |
# @example.co |
| 1363 |
# m">foo@exampl |
| 1364 |
# e.com</a></p> |
| 1365 |
# |
| 1366 |
# Based by a filter by Matthew Wickline, posted to BBEdit-Talk. |
| 1367 |
# With some optimizations by Milian Wolff. |
| 1368 |
# |
| 1369 |
$addr = "mailto:" . $addr; |
| 1370 |
$chars = preg_split('/(?<!^)(?!$)/', $addr); |
| 1371 |
$seed = (int)abs(crc32($addr) / strlen($addr)); # Deterministic seed. |
| 1372 |
|
| 1373 |
foreach ($chars as $key => $char) { |
| 1374 |
$ord = ord($char); |
| 1375 |
# Ignore non-ascii chars. |
| 1376 |
if ($ord < 128) { |
| 1377 |
$r = ($seed * (1 + $key)) % 100; # Pseudo-random function. |
| 1378 |
# roughly 10% raw, 45% hex, 45% dec |
| 1379 |
# '@' *must* be encoded. I insist. |
| 1380 |
if ($r > 90 && $char != '@') /* do nothing */; |
| 1381 |
else if ($r < 45) $chars[$key] = '&#x'.dechex($ord).';'; |
| 1382 |
else $chars[$key] = '&#'.$ord.';'; |
| 1383 |
} |
| 1384 |
} |
| 1385 |
|
| 1386 |
$addr = implode('', $chars); |
| 1387 |
$text = implode('', array_slice($chars, 7)); # text without `mailto:` |
| 1388 |
$addr = "<a href=\"$addr\">$text</a>"; |
| 1389 |
|
| 1390 |
return $addr; |
| 1391 |
} |
| 1392 |
|
| 1393 |
|
| 1394 |
function parseSpan($str) { |
| 1395 |
# |
| 1396 |
# Take the string $str and parse it into tokens, hashing embeded HTML, |
| 1397 |
# escaped characters and handling code spans. |
| 1398 |
# |
| 1399 |
$output = ''; |
| 1400 |
|
| 1401 |
$span_re = '{ |
| 1402 |
( |
| 1403 |
\\\\'.$this->escape_chars_re.' |
| 1404 |
| |
| 1405 |
(?<![`\\\\]) |
| 1406 |
`+ # code span marker |
| 1407 |
'.( $this->no_markup ? '' : ' |
| 1408 |
| |
| 1409 |
<!-- .*? --> # comment |
| 1410 |
| |
| 1411 |
<\?.*?\?> | <%.*?%> # processing instruction |
| 1412 |
| |
| 1413 |
<[/!$]?[-a-zA-Z0-9:_]+ # regular tags |
| 1414 |
(?> |
| 1415 |
\s |
| 1416 |
(?>[^"\'>]+|"[^"]*"|\'[^\']*\')* |
| 1417 |
)? |
| 1418 |
> |
| 1419 |
').' |
| 1420 |
) |
| 1421 |
}xs'; |
| 1422 |
|
| 1423 |
while (1) { |
| 1424 |
# |
| 1425 |
# Each loop iteration seach for either the next tag, the next |
| 1426 |
# openning code span marker, or the next escaped character. |
| 1427 |
# Each token is then passed to handleSpanToken. |
| 1428 |
# |
| 1429 |
$parts = preg_split($span_re, $str, 2, PREG_SPLIT_DELIM_CAPTURE); |
| 1430 |
|
| 1431 |
# Create token from text preceding tag. |
| 1432 |
if ($parts[0] != "") { |
| 1433 |
$output .= $parts[0]; |
| 1434 |
} |
| 1435 |
|
| 1436 |
# Check if we reach the end. |
| 1437 |
if (isset($parts[1])) { |
| 1438 |
$output .= $this->handleSpanToken($parts[1], $parts[2]); |
| 1439 |
$str = $parts[2]; |
| 1440 |
} |
| 1441 |
else { |
| 1442 |
break; |
| 1443 |
} |
| 1444 |
} |
| 1445 |
|
| 1446 |
return $output; |
| 1447 |
} |
| 1448 |
|
| 1449 |
|
| 1450 |
function handleSpanToken($token, &$str) { |
| 1451 |
# |
| 1452 |
# Handle $token provided by parseSpan by determining its nature and |
| 1453 |
# returning the corresponding value that should replace it. |
| 1454 |
# |
| 1455 |
switch ($token{0}) { |
| 1456 |
case "\\": |
| 1457 |
return $this->hashPart("&#". ord($token{1}). ";"); |
| 1458 |
case "`": |
| 1459 |
# Search for end marker in remaining text. |
| 1460 |
if (preg_match('/^(.*?[^`])'.preg_quote($token).'(?!`)(.*)$/sm', |
| 1461 |
$str, $matches)) |
| 1462 |
{ |
| 1463 |
$str = $matches[2]; |
| 1464 |
$codespan = $this->makeCodeSpan($matches[1]); |
| 1465 |
return $this->hashPart($codespan); |
| 1466 |
} |
| 1467 |
return $token; // return as text since no ending marker found. |
| 1468 |
default: |
| 1469 |
return $this->hashPart($token); |
| 1470 |
} |
| 1471 |
} |
| 1472 |
|
| 1473 |
|
| 1474 |
function outdent($text) { |
| 1475 |
# |
| 1476 |
# Remove one level of line-leading tabs or spaces |
| 1477 |
# |
| 1478 |
return preg_replace('/^(\t|[ ]{1,'.$this->tab_width.'})/m', '', $text); |
| 1479 |
} |
| 1480 |
|
| 1481 |
|
| 1482 |
# String length function for detab. `_initDetab` will create a function to |
| 1483 |
# hanlde UTF-8 if the default function does not exist. |
| 1484 |
var $utf8_strlen = 'mb_strlen'; |
| 1485 |
|
| 1486 |
function detab($text) { |
| 1487 |
# |
| 1488 |
# Replace tabs with the appropriate amount of space. |
| 1489 |
# |
| 1490 |
# For each line we separate the line in blocks delemited by |
| 1491 |
# tab characters. Then we reconstruct every line by adding the |
| 1492 |
# appropriate number of space between each blocks. |
| 1493 |
|
| 1494 |
$text = preg_replace_callback('/^.*\t.*$/m', |
| 1495 |
array(&$this, '_detab_callback'), $text); |
| 1496 |
|
| 1497 |
return $text; |
| 1498 |
} |
| 1499 |
function _detab_callback($matches) { |
| 1500 |
$line = $matches[0]; |
| 1501 |
$strlen = $this->utf8_strlen; # strlen function for UTF-8. |
| 1502 |
|
| 1503 |
# Split in blocks. |
| 1504 |
$blocks = explode("\t", $line); |
| 1505 |
# Add each blocks to the line. |
| 1506 |
$line = $blocks[0]; |
| 1507 |
unset($blocks[0]); # Do not add first block twice. |
| 1508 |
foreach ($blocks as $block) { |
| 1509 |
# Calculate amount of space, insert spaces, insert block. |
| 1510 |
$amount = $this->tab_width - |
| 1511 |
$strlen($line, 'UTF-8') % $this->tab_width; |
| 1512 |
$line .= str_repeat(" ", $amount) . $block; |
| 1513 |
} |
| 1514 |
return $line; |
| 1515 |
} |
| 1516 |
function _initDetab() { |
| 1517 |
# |
| 1518 |
# Check for the availability of the function in the `utf8_strlen` property |
| 1519 |
# (initially `mb_strlen`). If the function is not available, create a |
| 1520 |
# function that will loosely count the number of UTF-8 characters with a |
| 1521 |
# regular expression. |
| 1522 |
# |
| 1523 |
if (function_exists($this->utf8_strlen)) return; |
| 1524 |
$this->utf8_strlen = create_function('$text', 'return preg_match_all( |
| 1525 |
"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/", |
| 1526 |
$text, $m);'); |
| 1527 |
} |
| 1528 |
|
| 1529 |
|
| 1530 |
function unhash($text) { |
| 1531 |
# |
| 1532 |
# Swap back in all the tags hashed by _HashHTMLBlocks. |
| 1533 |
# |
| 1534 |
return preg_replace_callback('/(.)\x1A[0-9]+\1/', |
| 1535 |
array(&$this, '_unhash_callback'), $text); |
| 1536 |
} |
| 1537 |
function _unhash_callback($matches) { |
| 1538 |
return $this->html_hashes[$matches[0]]; |
| 1539 |
} |
| 1540 |
|
| 1541 |
} |
| 1542 |
} |
| 1543 |
|
| 1544 |
/* |
| 1545 |
|
| 1546 |
PHP Markdown |
| 1547 |
============ |
| 1548 |
|
| 1549 |
Description |
| 1550 |
----------- |
| 1551 |
|
| 1552 |
This is a PHP translation of the original Markdown formatter written in |
| 1553 |
Perl by John Gruber. |
| 1554 |
|
| 1555 |
Markdown is a text-to-HTML filter; it translates an easy-to-read / |
| 1556 |
easy-to-write structured text format into HTML. Markdown's text format |
| 1557 |
is most similar to that of plain text email, and supports features such |
| 1558 |
as headers, *emphasis*, code blocks, blockquotes, and links. |
| 1559 |
|
| 1560 |
Markdown's syntax is designed not as a generic markup language, but |
| 1561 |
specifically to serve as a front-end to (X)HTML. You can use span-level |
| 1562 |
HTML tags anywhere in a Markdown document, and you can use block level |
| 1563 |
HTML tags (like <div> and <table> as well). |
| 1564 |
|
| 1565 |
For more information about Markdown's syntax, see: |
| 1566 |
|
| 1567 |
<http://daringfireball.net/projects/markdown/> |
| 1568 |
|
| 1569 |
|
| 1570 |
Bugs |
| 1571 |
---- |
| 1572 |
|
| 1573 |
To file bug reports please send email to: |
| 1574 |
|
| 1575 |
<michel.fortin@michelf.com> |
| 1576 |
|
| 1577 |
Please include with your report: (1) the example input; (2) the output you |
| 1578 |
expected; (3) the output Markdown actually produced. |
| 1579 |
|
| 1580 |
|
| 1581 |
Version History |
| 1582 |
--------------- |
| 1583 |
|
| 1584 |
See the readme file for detailed release notes for this version. |
| 1585 |
|
| 1586 |
|
| 1587 |
Copyright and License |
| 1588 |
--------------------- |
| 1589 |
|
| 1590 |
PHP Markdown |
| 1591 |
Copyright (c) 2004-2009 Michel Fortin |
| 1592 |
<http://michelf.com/> |
| 1593 |
All rights reserved. |
| 1594 |
|
| 1595 |
Based on Markdown |
| 1596 |
Copyright (c) 2003-2006 John Gruber |
| 1597 |
<http://daringfireball.net/> |
| 1598 |
All rights reserved. |
| 1599 |
|
| 1600 |
Redistribution and use in source and binary forms, with or without |
| 1601 |
modification, are permitted provided that the following conditions are |
| 1602 |
met: |
| 1603 |
|
| 1604 |
* Redistributions of source code must retain the above copyright notice, |
| 1605 |
this list of conditions and the following disclaimer. |
| 1606 |
|
| 1607 |
* Redistributions in binary form must reproduce the above copyright |
| 1608 |
notice, this list of conditions and the following disclaimer in the |
| 1609 |
documentation and/or other materials provided with the distribution. |
| 1610 |
|
| 1611 |
* Neither the name "Markdown" nor the names of its contributors may |
| 1612 |
be used to endorse or promote products derived from this software |
| 1613 |
without specific prior written permission. |
| 1614 |
|
| 1615 |
This software is provided by the copyright holders and contributors "as |
| 1616 |
is" and any express or implied warranties, including, but not limited |
| 1617 |
to, the implied warranties of merchantability and fitness for a |
| 1618 |
particular purpose are disclaimed. In no event shall the copyright owner |
| 1619 |
or contributors be liable for any direct, indirect, incidental, special, |
| 1620 |
exemplary, or consequential damages (including, but not limited to, |
| 1621 |
procurement of substitute goods or services; loss of use, data, or |
| 1622 |
profits; or business interruption) however caused and on any theory of |
| 1623 |
liability, whether in contract, strict liability, or tort (including |
| 1624 |
negligence or otherwise) arising in any way out of the use of this |
| 1625 |
software, even if advised of the possibility of such damage. |
| 1626 |
|
| 1627 |
*/ |
