# vim:ts=4:sw=4: # = RedCloth - Textile and Markdown Hybrid for Ruby # # Homepage:: http://whytheluckystiff.net/ruby/redcloth/ # Author:: why the lucky stiff (http://whytheluckystiff.net/) # Copyright:: (cc) 2004 why the lucky stiff (and his puppet organizations.) # License:: BSD # # (see http://hobix.com/textile/ for a Textile Reference.) # # Based on (and also inspired by) both: # # PyTextile: http://diveintomark.org/projects/textile/textile.py.txt # Textism for PHP: http://www.textism.com/tools/textile/ # # # = RedCloth # # RedCloth is a Ruby library for converting Textile and/or Markdown # into HTML. You can use either format, intermingled or separately. # You can also extend RedCloth to honor your own custom text stylings. # # RedCloth users are encouraged to use Textile if they are generating # HTML and to use Markdown if others will be viewing the plain text. # # == What is Textile? # # Textile is a simple formatting style for text # documents, loosely based on some HTML conventions. # # == Sample Textile Text # # h2. This is a title # # h3. This is a subhead # # This is a bit of paragraph. # # bq. This is a blockquote. # # = Writing Textile # # A Textile document consists of paragraphs. Paragraphs # can be specially formatted by adding a small instruction # to the beginning of the paragraph. # # h[n]. Header of size [n]. # bq. Blockquote. # # Numeric list. # * Bulleted list. # # == Quick Phrase Modifiers # # Quick phrase modifiers are also included, to allow formatting # of small portions of text within a paragraph. # # \_emphasis\_ # \_\_italicized\_\_ # \*strong\* # \*\*bold\*\* # ??citation?? # -deleted text- # +inserted text+ # ^superscript^ # ~subscript~ # @code@ # %(classname)span% # # ==notextile== (leave text alone) # # == Links # # To make a hypertext link, put the link text in "quotation # marks" followed immediately by a colon and the URL of the link. # # Optional: text in (parentheses) following the link text, # but before the closing quotation mark, will become a Title # attribute for the link, visible as a tool tip when a cursor is above it. # # Example: # # "This is a link (This is a title) ":http://www.textism.com # # Will become: # # This is a link # # == Images # # To insert an image, put the URL for the image inside exclamation marks. # # Optional: text that immediately follows the URL in (parentheses) will # be used as the Alt text for the image. Images on the web should always # have descriptive Alt text for the benefit of readers using non-graphical # browsers. # # Optional: place a colon followed by a URL immediately after the # closing ! to make the image into a link. # # Example: # # !http://www.textism.com/common/textist.gif(Textist)! # # Will become: # # Textist # # With a link: # # !/common/textist.gif(Textist)!:http://textism.com # # Will become: # # Textist # # == Defining Acronyms # # HTML allows authors to define acronyms via the tag. The definition appears as a # tool tip when a cursor hovers over the acronym. A crucial aid to clear writing, # this should be used at least once for each acronym in documents where they appear. # # To quickly define an acronym in Textile, place the full text in (parentheses) # immediately following the acronym. # # Example: # # ACLU(American Civil Liberties Union) # # Will become: # # ACLU # # == Adding Tables # # In Textile, simple tables can be added by seperating each column by # a pipe. # # |a|simple|table|row| # |And|Another|table|row| # # Attributes are defined by style definitions in parentheses. # # table(border:1px solid black). # (background:#ddd;color:red). |{}| | | | # # == Using RedCloth # # RedCloth is simply an extension of the String class, which can handle # Textile formatting. Use it like a String and output HTML with its # RedCloth#to_html method. # # doc = RedCloth.new " # # h2. Test document # # Just a simple test." # # puts doc.to_html # # By default, RedCloth uses both Textile and Markdown formatting, with # Textile formatting taking precedence. If you want to turn off Markdown # formatting, to boost speed and limit the processor: # # class RedCloth::Textile.new( str ) class RedCloth < String VERSION = '3.0.3' DEFAULT_RULES = [:textile, :markdown] # # Two accessor for setting security restrictions. # # This is a nice thing if you're using RedCloth for # formatting in public places (e.g. Wikis) where you # don't want users to abuse HTML for bad things. # # If +:filter_html+ is set, HTML which wasn't # created by the Textile processor will be escaped. # # If +:filter_styles+ is set, it will also disable # the style markup specifier. ('{color: red}') # attr_accessor :filter_html, :filter_styles # # Accessor for toggling hard breaks. # # If +:hard_breaks+ is set, single newlines will # be converted to HTML break tags. This is the # default behavior for traditional RedCloth. # attr_accessor :hard_breaks # # Accessor for toggling span caps. # # Textile places `span' tags around capitalized # words by default, but this wreaks havoc on Wikis. # If +:no_span_caps+ is set, this will be # suppressed. # attr_accessor :no_span_caps # # Establishes the markup predence. Available rules include: # # == Textile Rules # # The following textile rules can be set individually. Or add the complete # set of rules with the single :textile rule, which supplies the rule set in # the following precedence: # # refs_textile:: Textile references (i.e. [hobix]http://hobix.com/) # block_textile_table:: Textile table block structures # block_textile_lists:: Textile list structures # block_textile_prefix:: Textile blocks with prefixes (i.e. bq., h2., etc.) # inline_textile_image:: Textile inline images # inline_textile_link:: Textile inline links # inline_textile_span:: Textile inline spans # inline_textile_glyphs:: Textile entities (such as em-dashes and smart quotes) # # == Markdown # # refs_markdown:: Markdown references (for example: [hobix]: http://hobix.com/) # block_markdown_setext:: Markdown setext headers # block_markdown_atx:: Markdown atx headers # block_markdown_rule:: Markdown horizontal rules # block_markdown_bq:: Markdown blockquotes # block_markdown_lists:: Markdown lists # inline_markdown_link:: Markdown links attr_accessor :rules # Returns a new RedCloth object, based on _string_ and # enforcing all the included _restrictions_. # # r = RedCloth.new( "h1. A bold man", [:filter_html] ) # r.to_html # #=>"

A <b>bold</b> man

" # def initialize( string, restrictions = [] ) restrictions.each { |r| method( "#{ r }=" ).call( true ) } super( string ) end # # Generates HTML from the Textile contents. # # r = RedCloth.new( "And then? She *fell*!" ) # r.to_html( true ) # #=>"And then? She fell!" # def to_html( *rules ) rules = DEFAULT_RULES if rules.empty? # make our working copy text = self.dup @urlrefs = {} @shelf = [] textile_rules = [:refs_textile, :block_textile_table, :block_textile_lists, :block_textile_prefix, :inline_textile_image, :inline_textile_link, :inline_textile_code, :inline_textile_glyphs, :inline_textile_span] markdown_rules = [:refs_markdown, :block_markdown_setext, :block_markdown_atx, :block_markdown_rule, :block_markdown_bq, :block_markdown_lists, :inline_markdown_reflink, :inline_markdown_link] @rules = rules.collect do |rule| case rule when :markdown markdown_rules when :textile textile_rules else rule end end.flatten # standard clean up incoming_entities text clean_white_space text no_textile text # start processor @pre_list = [] rip_offtags text hard_break text refs text blocks text inline text smooth_offtags text retrieve text text.gsub!( /<\/?notextile>/, '' ) text.gsub!( /x%x%/, '&' ) clean_html text if filter_html text.strip! text end ####### private ####### # # Mapping of 8-bit ASCII codes to HTML numerical entity equivalents. # (from PyTextile) # TEXTILE_TAGS = [[128, 8364], [129, 0], [130, 8218], [131, 402], [132, 8222], [133, 8230], [134, 8224], [135, 8225], [136, 710], [137, 8240], [138, 352], [139, 8249], [140, 338], [141, 0], [142, 0], [143, 0], [144, 0], [145, 8216], [146, 8217], [147, 8220], [148, 8221], [149, 8226], [150, 8211], [151, 8212], [152, 732], [153, 8482], [154, 353], [155, 8250], [156, 339], [157, 0], [158, 0], [159, 376]]. collect! do |a, b| [a.chr, ( b.zero? and "" or "&#{ b };" )] end # # Regular expressions to convert to HTML. # A_HLGN = /(?:(?:<>|<|>|\=|[()]+)+)/ A_VLGN = /[\-^~]/ C_CLAS = '(?:\([^)]+\))' C_LNGE = '(?:\[[^\]]+\])' C_STYL = '(?:\{[^}]+\})' S_CSPN = '(?:\\\\\d+)' S_RSPN = '(?:/\d+)' A = "(?:#{A_HLGN}?#{A_VLGN}?|#{A_VLGN}?#{A_HLGN}?)" S = "(?:#{S_CSPN}?#{S_RSPN}|#{S_RSPN}?#{S_CSPN}?)" C = "(?:#{C_CLAS}?#{C_STYL}?#{C_LNGE}?|#{C_STYL}?#{C_LNGE}?#{C_CLAS}?|#{C_LNGE}?#{C_STYL}?#{C_CLAS}?)" # PUNCT = Regexp::quote( '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~' ) PUNCT = Regexp::quote( '!"#$%&\'*+,-./:;=?@\\^_`|~' ) HYPERLINK = '(\S+?)([^\w\s/;=\?]*?)(?=\s|<|$)' # Text markup tags, don't conflict with block tags SIMPLE_HTML_TAGS = [ 'tt', 'b', 'i', 'big', 'small', 'em', 'strong', 'dfn', 'code', 'samp', 'kbd', 'var', 'cite', 'abbr', 'acronym', 'a', 'img', 'br', 'br', 'map', 'q', 'sub', 'sup', 'span', 'bdo' ] # Elements to handle GLYPHS = [ # [ /([^\s\[{(>])?\'([dmst]\b|ll\b|ve\b|\s|:|$)/, '\1’\2' ], # single closing [ /([^\s\[{(>])\'/, '\1’' ], # single closing [ /\'(?=\s|s\b|[#{PUNCT}])/, '’' ], # single closing [ /\'/, '‘' ], # single opening # [ /([^\s\[{(])?"(\s|:|$)/, '\1”\2' ], # double closing [ /([^\s\[{(>])"/, '\1”' ], # double closing [ /"(?=\s|[#{PUNCT}])/, '”' ], # double closing [ /"/, '“' ], # double opening [ /\b( )?\.{3}/, '\1…' ], # ellipsis [ /\b([A-Z][A-Z0-9]{2,})\b(?:[(]([^)]*)[)])/, '\1' ], # 3+ uppercase acronym [ /(^|[^"][>\s])([A-Z][A-Z0-9 ]{2,})([^\2\3', :no_span_caps ], # 3+ uppercase caps [ /(\.\s)?\s?--\s?/, '\1—' ], # em dash [ /\s->\s/, ' → ' ], # right arrow [ /\s-\s/, ' – ' ], # en dash [ /(\d+) ?x ?(\d+)/, '\1×\2' ], # dimension sign [ /\b ?[(\[]TM[\])]/i, '™' ], # trademark [ /\b ?[(\[]R[\])]/i, '®' ], # registered [ /\b ?[(\[]C[\])]/i, '©' ] # copyright ] H_ALGN_VALS = { '<' => 'left', '=' => 'center', '>' => 'right', '<>' => 'justify' } V_ALGN_VALS = { '^' => 'top', '-' => 'middle', '~' => 'bottom' } QTAGS = [ ['**', 'b'], ['*', 'strong'], ['??', 'cite', :limit], ['-', 'del', :limit], ['__', 'i'], ['_', 'em', :limit], ['%', 'span', :limit], ['+', 'ins', :limit], ['^', 'sup'], ['~', 'sub'] ] QTAGS.collect! do |rc, ht, rtype| rcq = Regexp::quote rc re = case rtype when :limit /(\W) (#{rcq}) (#{C}) (?::(\S+?))? (.+?) #{rcq} (?=\W)/x else /(#{rcq}) (#{C}) (?::(\S+?))? (.+?) #{rcq}/xm end [rc, ht, re, rtype] end # # Flexible HTML escaping # def htmlesc( str, mode ) str.gsub!( '&', '&' ) str.gsub!( '"', '"' ) if mode != :NoQuotes str.gsub!( "'", ''' ) if mode == :Quotes str.gsub!( '<', '<') str.gsub!( '>', '>') end # Search and replace for Textile glyphs (quotes, dashes, other symbols) def pgl( text ) GLYPHS.each do |re, resub, tog| next if tog and method( tog ).call text.gsub! re, resub end end # Parses Textile attribute lists and builds an HTML attribute string def pba( text_in, element = "" ) return '' unless text_in style = [] text = text_in.dup if element == 'td' colspan = $1 if text =~ /\\(\d+)/ rowspan = $1 if text =~ /\/(\d+)/ style << "vertical-align:#{ v_align( $& ) };" if text =~ A_VLGN end style << "#{ $1 };" if not filter_styles and text.sub!( /\{([^}]*)\}/, '' ) lang = $1 if text.sub!( /\[([^)]+?)\]/, '' ) cls = $1 if text.sub!( /\(([^()]+?)\)/, '' ) style << "padding-left:#{ $1.length }em;" if text.sub!( /([(]+)/, '' ) style << "padding-right:#{ $1.length }em;" if text.sub!( /([)]+)/, '' ) style << "text-align:#{ h_align( $& ) };" if text =~ A_HLGN cls, id = $1, $2 if cls =~ /^(.*?)#(.*)$/ atts = '' atts << " style=\"#{ style.join }\"" unless style.empty? atts << " class=\"#{ cls }\"" unless cls.to_s.empty? atts << " lang=\"#{ lang }\"" if lang atts << " id=\"#{ id }\"" if id atts << " colspan=\"#{ colspan }\"" if colspan atts << " rowspan=\"#{ rowspan }\"" if rowspan atts end TABLE_RE = /^(?:table(_?#{S}#{A}#{C})\. ?\n)?^(#{A}#{C}\.? ?\|.*?\|)(\n\n|\Z)/m # Parses a Textile table block, building HTML from the result. def block_textile_table( text ) text.gsub!( TABLE_RE ) do |matches| tatts, fullrow = $~[1..2] tatts = pba( tatts, 'table' ) tatts = shelve( tatts ) if tatts rows = [] fullrow. split( /\|$/m ). delete_if { |x| x.empty? }. each do |row| ratts, row = pba( $1, 'tr' ), $2 if row =~ /^(#{A}#{C}\. )(.*)/m cells = [] row.split( '|' ).each do |cell| ctyp = 'd' ctyp = 'h' if cell =~ /^_/ catts = '' catts, cell = pba( $1, 'td' ), $2 if cell =~ /^(_?#{S}#{A}#{C}\. ?)(.*)/ unless cell.strip.empty? catts = shelve( catts ) if catts cells << "\t\t\t#{ cell }" end end ratts = shelve( ratts ) if ratts rows << "\t\t\n#{ cells.join( "\n" ) }\n\t\t" end "\t\n#{ rows.join( "\n" ) }\n\t\n\n" end end LISTS_RE = /^([#*]+?#{C} .*?)$(?![^#*])/m LISTS_CONTENT_RE = /^([#*]+)(#{A}#{C}) (.*)$/m # Parses Textile lists and generates HTML def block_textile_lists( text ) text.gsub!( LISTS_RE ) do |match| lines = match.split( /\n/ ) last_line = -1 depth = [] lines.each_with_index do |line, line_id| if line =~ LISTS_CONTENT_RE tl,atts,content = $~[1..3] if depth.last if depth.last.length > tl.length (depth.length - 1).downto(0) do |i| break if depth[i].length == tl.length lines[line_id - 1] << "\n\t\n\t" depth.pop end end if depth.last.length == tl.length lines[line_id - 1] << '' end end unless depth.last == tl depth << tl atts = pba( atts ) atts = shelve( atts ) if atts lines[line_id] = "\t<#{ lT(tl) }l#{ atts }>\n\t
  • #{ content }" else lines[line_id] = "\t\t
  • #{ content }" end last_line = line_id else last_line = line_id end if line_id - last_line > 1 or line_id == lines.length - 1 depth.delete_if do |v| lines[last_line] << "
  • \n\t" end end end lines.join( "\n" ) end end CODE_RE = /(\W) @ (?:\|(\w+?)\|)? (.+?) @ (?=\W)/x def inline_textile_code( text ) text.gsub!( CODE_RE ) do |m| before,lang,code,after = $~[1..4] lang = " lang=\"#{ lang }\"" if lang rip_offtags( "#{ before }#{ code }#{ after }" ) end end def lT( text ) text =~ /\#$/ ? 'o' : 'u' end def hard_break( text ) text.gsub!( /(.)\n(?! *[#*\s|]|$)/, "\\1
    " ) if hard_breaks end BLOCKS_GROUP_RE = /\n{2,}(?! )/m def blocks( text, deep_code = false ) text.replace( text.split( BLOCKS_GROUP_RE ).collect do |blk| plain = blk !~ /\A[#*> ]/ # skip blocks that are complex HTML if blk =~ /^<\/?(\w+).*>/ and not SIMPLE_HTML_TAGS.include? $1 blk else # search for indentation levels blk.strip! if blk.empty? blk else code_blk = nil blk.gsub!( /((?:\n(?:\n^ +[^\n]*)+)+)/m ) do |iblk| flush_left iblk blocks iblk, plain iblk.gsub( /^(\S)/, "\t\\1" ) if plain code_blk = iblk; "" else iblk end end block_applied = 0 @rules.each do |rule_name| block_applied += 1 if ( rule_name.to_s.match /^block_/ and method( rule_name ).call( blk ) ) end if block_applied.zero? if deep_code blk = "\t
    #{ blk }
    " else blk = "\t

    #{ blk }

    " end end # hard_break blk blk + "\n#{ code_blk }" end end end.join( "\n\n" ) ) end def textile_bq( tag, atts, cite, content ) cite, cite_title = check_refs( cite ) cite = " cite=\"#{ cite }\"" if cite atts = shelve( atts ) if atts "\t\n\t\t#{ content }

    \n\t" end def textile_p( tag, atts, cite, content ) atts = shelve( atts ) if atts "\t<#{ tag }#{ atts }>#{ content }" end alias textile_h1 textile_p alias textile_h2 textile_p alias textile_h3 textile_p alias textile_h4 textile_p alias textile_h5 textile_p alias textile_h6 textile_p def textile_fn_( tag, num, atts, cite, content ) atts << " id=\"fn#{ num }\"" content = "#{ num } #{ content }" atts = shelve( atts ) if atts "\t#{ content }

    " end BLOCK_RE = /^(([a-z]+)(\d*))(#{A}#{C})\.(?::(\S+))? (.*)$/m def block_textile_prefix( text ) if text =~ BLOCK_RE tag,tagpre,num,atts,cite,content = $~[1..6] atts = pba( atts ) # pass to prefix handler if respond_to? "textile_#{ tag }", true text.gsub!( $&, method( "textile_#{ tag }" ).call( tag, atts, cite, content ) ) elsif respond_to? "textile_#{ tagpre }_", true text.gsub!( $&, method( "textile_#{ tagpre }_" ).call( tagpre, num, atts, cite, content ) ) end end end SETEXT_RE = /\A(.+?)\n([=-])[=-]* *$/m def block_markdown_setext( text ) if text =~ SETEXT_RE tag = if $2 == "="; "h1"; else; "h2"; end blk, cont = "<#{ tag }>#{ $1 }", $' blocks cont text.replace( blk + cont ) end end ATX_RE = /\A(\#{1,6}) # $1 = string of #'s [ ]* (.+?) # $2 = Header text [ ]* \#* # optional closing #'s (not counted) $/x def block_markdown_atx( text ) if text =~ ATX_RE tag = "h#{ $1.length }" blk, cont = "<#{ tag }>#{ $2 }\n\n", $' blocks cont text.replace( blk + cont ) end end MARKDOWN_BQ_RE = /\A(^ *> ?.+$(.+\n)*\n*)+/m def block_markdown_bq( text ) text.gsub!( MARKDOWN_BQ_RE ) do |blk| blk.gsub!( /^ *> ?/, '' ) flush_left blk blocks blk blk.gsub!( /^(\S)/, "\t\\1" ) "
    \n#{ blk }\n
    \n\n" end end MARKDOWN_RULE_RE = /^#{ ['*', '-', '_'].collect { |ch| '( ?' + Regexp::quote( ch ) + ' ?){3,}' }.join( '|' ) }$/ def block_markdown_rule( text ) text.gsub!( MARKDOWN_RULE_RE ) do |blk| "
    " end end # XXX TODO XXX def block_markdown_lists( text ) end def inline_markdown_link( text ) end def inline_textile_span( text ) QTAGS.each do |qtag_rc, ht, qtag_re, rtype| text.gsub!( qtag_re ) do |m| case rtype when :limit sta,qtag,atts,cite,content = $~[1..5] else qtag,atts,cite,content = $~[1..4] sta = '' end atts = pba( atts ) atts << " cite=\"#{ cite }\"" if cite atts = shelve( atts ) if atts "#{ sta }<#{ ht }#{ atts }>#{ content }" end end end LINK_RE = / ([\s\[{(]|[#{PUNCT}])? # $pre " # start (#{C}) # $atts ([^"]+?) # $text \s? (?:\(([^)]+?)\)(?="))? # $title ": (\S+?) # $url (\/)? # $slash ([^\w\/;]*?) # $post (?=<|\s|$) /x def inline_textile_link( text ) text.gsub!( LINK_RE ) do |m| pre,atts,text,title,url,slash,post = $~[1..7] url, url_title = check_refs( url ) title ||= url_title atts = pba( atts ) atts = " href=\"#{ url }#{ slash }\"#{ atts }" atts << " title=\"#{ title }\"" if title atts = shelve( atts ) if atts "#{ pre }#{ text }#{ post }" end end MARKDOWN_REFLINK_RE = / \[([^\[\]]+)\] # $text [ ]? # opt. space (?:\n[ ]*)? # one optional newline followed by spaces \[(.*?)\] # $id /x def inline_markdown_reflink( text ) text.gsub!( MARKDOWN_REFLINK_RE ) do |m| text, id = $~[1..2] if id.empty? url, title = check_refs( text ) else url, title = check_refs( id ) end atts = " href=\"#{ url }\"" atts << " title=\"#{ title }\"" if title atts = shelve( atts ) "#{ text }" end end MARKDOWN_LINK_RE = / \[([^\[\]]+)\] # $text \( # open paren [ \t]* # opt space ? # $href [ \t]* # opt space (?: # whole title (['"]) # $quote (.*?) # $title \3 # matching quote )? # title is optional \) /x def inline_markdown_link( text ) text.gsub!( MARKDOWN_LINK_RE ) do |m| text, url, quote, title = $~[1..4] atts = " href=\"#{ url }\"" atts << " title=\"#{ title }\"" if title atts = shelve( atts ) "#{ text }" end end TEXTILE_REFS_RE = /(^ *)\[([^\n]+?)\](#{HYPERLINK})(?=\s|$)/ MARKDOWN_REFS_RE = /(^ *)\[([^\n]+?)\]:\s+?(?:\s+"((?:[^"]|\\")+)")?(?=\s|$)/m def refs( text ) @rules.each do |rule_name| method( rule_name ).call( text ) if rule_name.to_s.match /^refs_/ end end def refs_textile( text ) text.gsub!( TEXTILE_REFS_RE ) do |m| flag, url = $~[2..3] @urlrefs[flag.downcase] = [url, nil] nil end end def refs_markdown( text ) text.gsub!( MARKDOWN_REFS_RE ) do |m| flag, url = $~[2..3] title = $~[6] @urlrefs[flag.downcase] = [url, title] nil end end def check_refs( text ) ret = @urlrefs[text.downcase] if text ret || [text, nil] end IMAGE_RE = / (

    |.|^) # start of line? \! # opening (\<|\=|\>)? # optional alignment atts (#{C}) # optional style,class atts (?:\. )? # optional dot-space ([^\s(!]+?) # presume this is the src \s? # optional space (?:\(((?:[^\(\)]|\([^\)]+\))+?)\))? # optional title \! # closing (?::#{ HYPERLINK })? # optional href /x def inline_textile_image( text ) text.gsub!( IMAGE_RE ) do |m| stln,algn,atts,url,title,href,href_a1,href_a2 = $~[1..8] atts = pba( atts ) atts = " src=\"#{ url }\"#{ atts }" atts << " title=\"#{ title }\"" if title atts << " alt=\"#{ title }\"" # size = @getimagesize($url); # if($size) $atts.= " $size[3]"; href, alt_title = check_refs( href ) if href url, url_title = check_refs( url ) out = '' out << "" if href out << "" out << "#{ href_a1 }#{ href_a2 }" if href if algn algn = h_align( algn ) if stln == "

    " out = "

    #{ out }" else out = "#{ stln }

    #{ out }
    " end else out = stln + out end out end end def shelve( val ) @shelf << val " <#{ @shelf.length }>" end def retrieve( text ) @shelf.each_with_index do |r, i| text.gsub!( " <#{ i + 1 }>", r ) end end def incoming_entities( text ) ## turn any incoming ampersands into a dummy character for now. ## This uses a negative lookahead for alphanumerics followed by a semicolon, ## implying an incoming html entity, to be skipped text.gsub!( /&(?![#a-z0-9]+;)/i, "x%x%" ) end def no_textile( text ) text.gsub!( /(^|\s)==([^=]+.*?)==(\s|$)?/, '\1\2\3' ) text.gsub!( /^ *==([^=]+.*?)==/m, '\1\2\3' ) end def clean_white_space( text ) # normalize line breaks text.gsub!( /\r\n/, "\n" ) text.gsub!( /\r/, "\n" ) text.gsub!( /\t/, ' ' ) text.gsub!( /^ +$/, '' ) text.gsub!( /\n{3,}/, "\n\n" ) text.gsub!( /"$/, "\" " ) # if entire document is indented, flush # to the left side flush_left text end def flush_left( text ) indt = 0 if text =~ /^ / while text !~ /^ {#{indt}}\S/ indt += 1 end unless text.empty? if indt.nonzero? text.gsub!( /^ {#{indt}}/, '' ) end end end def footnote_ref( text ) text.gsub!( /\b\[([0-9]+?)\](\s)?/, '\1\2' ) end OFFTAGS = /(code|pre|kbd|notextile)/ OFFTAG_MATCH = /(?:(<\/#{ OFFTAGS }>)|(<#{ OFFTAGS }[^>]*>))(.*?)(?=<\/?#{ OFFTAGS }|\Z)/mi OFFTAG_OPEN = /<#{ OFFTAGS }/ OFFTAG_CLOSE = /<\/?#{ OFFTAGS }/ HASTAG_MATCH = /(<\/?\w[^\n]*?>)/m ALLTAG_MATCH = /(<\/?\w[^\n]*?>)|.*?(?=<\/?\w[^\n]*?>|$)/m def inline_textile_glyphs( text, level = 0 ) if text !~ HASTAG_MATCH pgl text footnote_ref text else codepre = 0 text.gsub!( ALLTAG_MATCH ) do |line| ## matches are off if we're between ,
     etc.
                    if $1
                        if line =~ OFFTAG_OPEN
                            codepre += 1
                        elsif line =~ OFFTAG_CLOSE
                            codepre -= 1
                            codepre = 0 if codepre < 0
                        end 
                    elsif codepre.zero?
                        inline_textile_glyphs( line, level + 1 )
                    else
                        htmlesc( line, :NoQuotes )
                    end
                    ## p [level, codepre, orig_line, line]
    
                    line
                end
            end
        end
    
        def rip_offtags( text )
            if text =~ /<.*>/
                ## strip and encode 
     content
                codepre, used_offtags = 0, {}
                text.gsub!( OFFTAG_MATCH ) do |line|
                    if $3
                        offtag, aftertag = $4, $5
                        codepre += 1
                        used_offtags[offtag] = true
                        if codepre - used_offtags.length > 0
                            htmlesc( line, :NoQuotes ) unless used_offtags['notextile']
                            @pre_list.last << line
                            line = ""
                        else
                            htmlesc( aftertag, :NoQuotes ) if aftertag and not used_offtags['notextile']
                            line = ""
                            @pre_list << "#{ $3 }#{ aftertag }"
                        end
                    elsif $1 and codepre > 0
                        if codepre - used_offtags.length > 0
                            htmlesc( line, :NoQuotes ) unless used_offtags['notextile']
                            @pre_list.last << line
                            line = ""
                        end
                        codepre -= 1 unless codepre.zero?
                        used_offtags = {} if codepre.zero?
                    end 
                    line
                end
            end
            text
        end
    
        def smooth_offtags( text )
            unless @pre_list.empty?
                ## replace 
     content
                text.gsub!( // ) { @pre_list[$1.to_i] }
            end
        end
    
        def inline( text ) 
            @rules.each do |rule_name|
                method( rule_name ).call( text ) if rule_name.to_s.match /^inline_/
            end
        end
    
        def h_align( text ) 
            H_ALGN_VALS[text]
        end
    
        def v_align( text ) 
            V_ALGN_VALS[text]
        end
    
        def textile_popup_help( name, windowW, windowH )
            ' ' + name + '
    ' end # HTML cleansing stuff BASIC_TAGS = { 'a' => ['href', 'title'], 'img' => ['src', 'alt', 'title'], 'br' => [], 'i' => nil, 'u' => nil, 'b' => nil, 'pre' => nil, 'kbd' => nil, 'code' => ['lang'], 'cite' => nil, 'strong' => nil, 'em' => nil, 'ins' => nil, 'sup' => nil, 'sub' => nil, 'del' => nil, 'table' => nil, 'tr' => nil, 'td' => ['colspan', 'rowspan'], 'th' => nil, 'ol' => nil, 'ul' => nil, 'li' => nil, 'p' => nil, 'h1' => nil, 'h2' => nil, 'h3' => nil, 'h4' => nil, 'h5' => nil, 'h6' => nil, 'blockquote' => ['cite'] } def clean_html( text, tags = BASIC_TAGS ) text.gsub!( /]*)>/ ) do raw = $~ tag = raw[2].downcase if tags.has_key? tag pcs = [tag] tags[tag].each do |prop| ['"', "'", ''].each do |q| q2 = ( q != '' ? q : '\s' ) if raw[3] =~ /#{prop}\s*=\s*#{q}([^#{q2}]+)#{q}/i attrv = $1 next if prop == 'src' and attrv !~ /^http/ pcs << "#{prop}=\"#{$1.gsub('"', '\\"')}\"" break end end end if tags[tag] "<#{raw[1]}#{pcs.join " "}>" else " " end end end end