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bigdir/lib/redcloth3.rb

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2013-08-01 10:33:49 +08:00
# 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
#
# h3. 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:
#
# <a href="http://www.textism.com" title="This is a title">This is a link</a>
#
# == 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:
#
# <img src="http://www.textism.com/common/textist.gif" alt="Textist" />
#
# With a link:
#
# !/common/textist.gif(Textist)!:http://textism.com
#
# Will become:
#
# <a href="http://textism.com"><img src="/common/textist.gif" alt="Textist" /></a>
#
# == 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:
#
# <acronym title="American Civil Liberties Union">ACLU</acronym>
#
# == 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 "
#
# h3. 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 RedCloth3 < String
VERSION = '3.0.4'
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 lite mode.
#
# In lite mode, block-level rules are ignored. This means
# that tables, paragraphs, lists, and such aren't available.
# Only the inline markup for bold, italics, entities and so on.
#
# r = RedCloth.new( "And then? She *fell*!", [:lite_mode] )
# r.to_html
# #=> "And then? She <strong>fell</strong>!"
#
attr_accessor :lite_mode
#
# 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., h3., etc.)
# inline_textile_image:: Textile inline images
# inline_textile_link:: Textile inline links
# inline_textile_span:: Textile inline spans
# glyphs_textile:: 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 <b>bold</b> man", [:filter_html] )
# r.to_html
# #=>"<h1>A &lt;b&gt;bold&lt;/b&gt; man</h1>"
#
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 <strong>fell</strong>!"
#
def to_html( *rules )
rules = DEFAULT_RULES if rules.empty?
# make our working copy
text = self.dup
@urlrefs = {}
@shelf = []
textile_rules = [:block_textile_table, :block_textile_lists,
:block_textile_prefix, :inline_textile_image, :inline_textile_link,
:inline_textile_code, :inline_textile_span, :glyphs_textile]
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
# start processor
@pre_list = []
rip_offtags text
no_textile text
escape_html_tags text
# need to do this before #hard_break and #blocks
block_textile_quotes text unless @lite_mode
hard_break text
unless @lite_mode
refs text
blocks text
end
inline text
smooth_offtags text
retrieve text
text.gsub!( /<\/?notextile>/, '' )
text.gsub!( /x%x%/, '&#38;' )
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( '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~' )
PUNCT = Regexp::quote( '!"#$%&\'*+,-./:;=?@\\^_`|~' )
PUNCT_NOQ = Regexp::quote( '!"#$&\',./:;=?@\\`|' )
PUNCT_Q = Regexp::quote( '*-_+^~%' )
HYPERLINK = '(\S+?)([^\w\s/;=\?]*?)(?=\s|<|$)'
# 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'
]
QTAGS = [
['**', 'b', :limit],
['*', 'strong', :limit],
['??', 'cite', :limit],
['-', 'del', :limit],
['__', 'i', :limit],
['_', 'em', :limit],
['%', 'span', :limit],
['+', 'ins', :limit],
['^', 'sup', :limit],
['~', 'sub', :limit]
]
QTAGS_JOIN = QTAGS.map {|rc, ht, rtype| Regexp::quote rc}.join('|')
QTAGS.collect! do |rc, ht, rtype|
rcq = Regexp::quote rc
re =
case rtype
when :limit
/(^|[>\s\(]) # sta
(?!\-\-)
(#{QTAGS_JOIN}|) # oqs
(#{rcq}) # qtag
(\w|[^\s].*?[^\s]) # content
(?!\-\-)
#{rcq}
(#{QTAGS_JOIN}|) # oqa
(?=[[:punct:]]|<|\s|\)|$)/x
else
/(#{rcq})
(#{C})
(?::(\S+))?
(\w|[^\s\-].*?[^\s\-])
#{rcq}/xm
end
[rc, ht, re, rtype]
end
# Elements to handle
GLYPHS = [
# [ /([^\s\[{(>])?\'([dmst]\b|ll\b|ve\b|\s|:|$)/, '\1&#8217;\2' ], # single closing
# [ /([^\s\[{(>#{PUNCT_Q}][#{PUNCT_Q}]*)\'/, '\1&#8217;' ], # single closing
# [ /\'(?=[#{PUNCT_Q}]*(s\b|[\s#{PUNCT_NOQ}]))/, '&#8217;' ], # single closing
# [ /\'/, '&#8216;' ], # single opening
# [ /</, '&lt;' ], # less-than
# [ />/, '&gt;' ], # greater-than
# [ /([^\s\[{(])?"(\s|:|$)/, '\1&#8221;\2' ], # double closing
# [ /([^\s\[{(>#{PUNCT_Q}][#{PUNCT_Q}]*)"/, '\1&#8221;' ], # double closing
# [ /"(?=[#{PUNCT_Q}]*[\s#{PUNCT_NOQ}])/, '&#8221;' ], # double closing
# [ /"/, '&#8220;' ], # double opening
# [ /\b( )?\.{3}/, '\1&#8230;' ], # ellipsis
# [ /\b([A-Z][A-Z0-9]{2,})\b(?:[(]([^)]*)[)])/, '<acronym title="\2">\1</acronym>' ], # 3+ uppercase acronym
# [ /(^|[^"][>\s])([A-Z][A-Z0-9 ]+[A-Z0-9])([^<A-Za-z0-9]|$)/, '\1<span class="caps">\2</span>\3', :no_span_caps ], # 3+ uppercase caps
# [ /(\.\s)?\s?--\s?/, '\1&#8212;' ], # em dash
# [ /\s->\s/, ' &rarr; ' ], # right arrow
# [ /\s-\s/, ' &#8211; ' ], # en dash
# [ /(\d+) ?x ?(\d+)/, '\1&#215;\2' ], # dimension sign
# [ /\b ?[(\[]TM[\])]/i, '&#8482;' ], # trademark
# [ /\b ?[(\[]R[\])]/i, '&#174;' ], # registered
# [ /\b ?[(\[]C[\])]/i, '&#169;' ] # copyright
]
H_ALGN_VALS = {
'<' => 'left',
'=' => 'center',
'>' => 'right',
'<>' => 'justify'
}
V_ALGN_VALS = {
'^' => 'top',
'-' => 'middle',
'~' => 'bottom'
}
#
# Flexible HTML escaping
#
def htmlesc( str, mode=:Quotes )
if str
str.gsub!( '&', '&amp;' )
str.gsub!( '"', '&quot;' ) if mode != :NoQuotes
str.gsub!( "'", '&#039;' ) if mode == :Quotes
str.gsub!( '<', '&lt;')
str.gsub!( '>', '&gt;')
end
str
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
text.gsub!(/\b([A-Z][A-Z0-9]{1,})\b(?:[(]([^)]*)[)])/) do |m|
"<acronym title=\"#{htmlesc $2}\">#{$1}</acronym>"
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
if text.sub!( /\{([^"}]*)\}/, '' ) && !filter_styles
sanitized = sanitize_styles($1)
style << "#{ sanitized };" unless sanitized.blank?
end
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
STYLES_RE = /^(color|width|height|border|background|padding|margin|font|text|float)(-[a-z]+)*:\s*((\d+%?|\d+px|\d+(\.\d+)?em|#[0-9a-f]+|[a-z]+)\s*)+$/i
def sanitize_styles(str)
styles = str.split(";").map(&:strip)
styles.reject! do |style|
!style.match(STYLES_RE)
end
styles.join(";")
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.each_line do |row|
ratts, row = pba( $1, 'tr' ), $2 if row =~ /^(#{A}#{C}\. )(.*)/m
cells = []
row.split( /(\|)(?![^\[\|]*\]\])/ )[1..-2].each do |cell|
next if cell == '|'
ctyp = 'd'
ctyp = 'h' if cell =~ /^_/
catts = ''
catts, cell = pba( $1, 'td' ), $2 if cell =~ /^(_?#{S}#{A}#{C}\. ?)(.*)/
catts = shelve( catts ) if catts
cells << "\t\t\t<t#{ ctyp }#{ catts }>#{ cell }</t#{ ctyp }>"
end
ratts = shelve( ratts ) if ratts
rows << "\t\t<tr#{ ratts }>\n#{ cells.join( "\n" ) }\n\t\t</tr>"
end
"\t<table#{ tatts }>\n#{ rows.join( "\n" ) }\n\t</table>\n\n"
end
end
LISTS_RE = /^([#*]+?#{C} .*?)$(?![^#*])/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 = $~[1..3]
if depth.last
if depth.last.length > tl.length
(depth.length - 1).downto(0) do |i|
break if depth[i].length == tl.length
lines[line_id - 1] << "</li>\n\t</#{ lT( depth[i] ) }l>\n\t"
depth.pop
end
end
if depth.last and depth.last.length == tl.length
lines[line_id - 1] << '</li>'
end
end
unless depth.last == tl
depth << tl
atts = pba( atts )
atts = shelve( atts ) if atts
lines[line_id] = "\t<#{ lT(tl) }l#{ atts }>\n\t<li>#{ content }"
else
lines[line_id] = "\t\t<li>#{ content }"
end
last_line = line_id
else
last_line = line_id
end
if line_id - last_line > 1 or line_id == lines.length - 1
while v = depth.pop
lines[last_line] << "</li>\n\t</#{ lT( v ) }l>"
end
end
end
lines.join( "\n" )
end
end
QUOTES_RE = /(^>+([^\n]*?)(\n|$))+/m
QUOTES_CONTENT_RE = /^([> ]+)(.*)$/m
def block_textile_quotes( text )
text.gsub!( QUOTES_RE ) do |match|
lines = match.split( /\n/ )
quotes = ''
indent = 0
lines.each do |line|
line =~ QUOTES_CONTENT_RE
bq,content = $1, $2
l = bq.count('>')
if l != indent
quotes << ("\n\n" + (l>indent ? '<blockquote>' * (l-indent) : '</blockquote>' * (indent-l)) + "\n\n")
indent = l
end
quotes << (content + "\n")
end
quotes << ("\n" + '</blockquote>' * indent + "\n\n")
quotes
end
end
CODE_RE = /(\W)
@
(?:\|(\w+?)\|)?
(.+?)
@
(?=\W)/x
def inline_textile_code( text )
text.gsub!( CODE_RE ) do |m|
before,lang,code,after = $~[1..4]
lang = " lang=\"#{ lang }\"" if lang
rip_offtags( "#{ before }<code#{ lang }>#{ code }</code>#{ after }", false )
end
end
def lT( text )
text =~ /\#$/ ? 'o' : 'u'
end
def hard_break( text )
text.gsub!( /(.)\n(?!\Z| *([#*=]+(\s|$)|[{|]))/, "\\1<br />" ) 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? $1
blk
else
# search for indentation levels
blk.strip!
if blk.empty?
blk
else
code_blk = nil
blk.gsub!( /((?:\n(?:\n^ +[^\n]*)+)+)/m ) do |iblk|
flush_left iblk
blocks iblk, plain
iblk.gsub( /^(\S)/, "\t\\1" )
if plain
code_blk = iblk; ""
else
iblk
end
end
block_applied = 0
@rules.each do |rule_name|
block_applied += 1 if ( rule_name.to_s.match /^block_/ and method( rule_name ).call( blk ) )
end
if block_applied.zero?
if deep_code
blk = "\t<pre><code>#{ blk }</code></pre>"
else
blk = "\t<p>#{ blk }</p>"
end
end
# hard_break blk
blk + "\n#{ code_blk }"
end
end
end.join( "\n\n" ) )
end
def textile_bq( tag, atts, cite, content )
cite, cite_title = check_refs( cite )
cite = " cite=\"#{ cite }\"" if cite
atts = shelve( atts ) if atts
"\t<blockquote#{ cite }>\n\t\t<p#{ atts }>#{ content }</p>\n\t</blockquote>"
end
def textile_p( tag, atts, cite, content )
atts = shelve( atts ) if atts
"\t<#{ tag }#{ atts }>#{ content }</#{ tag }>"
end
alias textile_h1 textile_p
alias textile_h3 textile_p
alias textile_h3 textile_p
alias textile_h4 textile_p
alias textile_h5 textile_p
alias textile_h6 textile_p
def textile_fn_( tag, num, atts, cite, content )
atts << " id=\"fn#{ num }\" class=\"footnote\""
content = "<sup>#{ num }</sup> #{ content }"
atts = shelve( atts ) if atts
"\t<p#{ atts }>#{ content }</p>"
end
BLOCK_RE = /^(([a-z]+)(\d*))(#{A}#{C})\.(?::(\S+))? (.*)$/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
replacement = nil
if respond_to? "textile_#{ tag }", true
replacement = method( "textile_#{ tag }" ).call( tag, atts, cite, content )
elsif respond_to? "textile_#{ tagpre }_", true
replacement = method( "textile_#{ tagpre }_" ).call( tagpre, num, atts, cite, content )
end
text.gsub!( $& ) { replacement } if replacement
end
end
SETEXT_RE = /\A(.+?)\n([=-])[=-]* *$/m
def block_markdown_setext( text )
if text =~ SETEXT_RE
tag = if $2 == "="; "h1"; else; "h3"; end
blk, cont = "<#{ tag }>#{ $1 }</#{ tag }>", $'
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 }</#{ tag }>\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" )
"<blockquote>\n#{ blk }\n</blockquote>\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|
"<hr />"
end
end
# XXX TODO XXX
def block_markdown_lists( 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,oqs,qtag,content,oqa = $~[1..6]
atts = nil
if content =~ /^(#{C})(.+)$/
atts, content = $~[1..2]
end
else
qtag,atts,cite,content = $~[1..4]
sta = ''
end
atts = pba( atts )
atts = shelve( atts ) if atts
"#{ sta }#{ oqs }<#{ ht }#{ atts }>#{ content }</#{ ht }>#{ oqa }"
end
end
end
LINK_RE = /
(
([\s\[{(]|[#{PUNCT}])? # $pre
" # start
(#{C}) # $atts
([^"\n]+?) # $text
\s?
(?:\(([^)]+?)\)(?="))? # $title
":
( # $url
(\/|[a-zA-Z]+:\/\/|www\.|mailto:) # $proto
[[:alnum:]_\/]\S+?
)
(\/)? # $slash
([^[:alnum:]_\=\/;\(\)]*?) # $post
)
(?=<|\s|$)
/x
#"
def inline_textile_link( text )
text.gsub!( LINK_RE ) do |m|
all,pre,atts,text,title,url,proto,slash,post = $~[1..9]
if text.include?('<br />')
all
else
url, url_title = check_refs( url )
title ||= url_title
# Idea below : an URL with unbalanced parethesis and
# ending by ')' is put into external parenthesis
if ( url[-1]==?) and ((url.count("(") - url.count(")")) < 0 ) )
url=url[0..-2] # discard closing parenth from url
post = ")"+post # add closing parenth to post
end
atts = pba( atts )
atts = " href=\"#{ htmlesc url }#{ slash }\"#{ atts }"
atts << " title=\"#{ htmlesc title }\"" if title
atts = shelve( atts ) if atts
external = (url =~ /^https?:\/\//) ? ' class="external"' : ''
"#{ pre }<a#{ atts }#{ external }>#{ text }</a>#{ post }"
end
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 )
"<a#{ atts }>#{ text }</a>"
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 )
"<a#{ atts }>#{ text }</a>"
end
end
TEXTILE_REFS_RE = /(^ *)\[([^\[\n]+?)\](#{HYPERLINK})(?=\s|$)/
MARKDOWN_REFS_RE = /(^ *)\[([^\n]+?)\]:\s+<?(#{HYPERLINK})>?(?:\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 = /
(>|\s|^) # 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 = $~[1..8]
htmlesc title
atts = pba( atts )
atts = " src=\"#{ htmlesc url.dup }\"#{ atts }"
atts << " title=\"#{ title }\"" if title
atts << " alt=\"#{ title }\""
# size = @getimagesize($url);
# if($size) $atts.= " $size[3]";
href, alt_title = check_refs( href ) if href
url, url_title = check_refs( url )
out = ''
out << "<a#{ shelve( " href=\"#{ href }\"" ) }>" if href
out << "<img#{ shelve( atts ) } />"
out << "</a>#{ href_a1 }#{ href_a2 }" if href
if algn
algn = h_align( algn )
if stln == "<p>"
out = "<p style=\"float:#{ algn }\">#{ out }"
else
out = "#{ stln }<div style=\"float:#{ algn }\">#{ out }</div>"
end
else
out = stln + out
end
out
end
end
def shelve( val )
@shelf << val
" :redsh##{ @shelf.length }:"
end
def retrieve( text )
@shelf.each_with_index do |r, i|
text.gsub!( " :redsh##{ i + 1 }:", r )
end
end
def incoming_entities( text )
## turn any incoming ampersands into a dummy character for now.
## This uses a negative lookahead for alphanumerics followed by a semicolon,
## implying an incoming html entity, to be skipped
text.gsub!( /&(?![#a-z0-9]+;)/i, "x%x%" )
end
def no_textile( text )
text.gsub!( /(^|\s)==([^=]+.*?)==(\s|$)?/,
'\1<notextile>\2</notextile>\3' )
text.gsub!( /^ *==([^=]+.*?)==/m,
'\1<notextile>\2</notextile>\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)?/,
'<sup><a href="#fn\1">\1</a></sup>\2' )
end
OFFTAGS = /(code|pre|kbd|notextile)/
OFFTAG_MATCH = /(?:(<\/#{ OFFTAGS }>)|(<#{ OFFTAGS }[^>]*>))(.*?)(?=<\/?#{ OFFTAGS }\W|\Z)/mi
OFFTAG_OPEN = /<#{ OFFTAGS }/
OFFTAG_CLOSE = /<\/?#{ OFFTAGS }/
HASTAG_MATCH = /(<\/?\w[^\n]*?>)/m
ALLTAG_MATCH = /(<\/?\w[^\n]*?>)|.*?(?=<\/?\w[^\n]*?>|$)/m
def glyphs_textile( 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 <code>, <pre> etc.
if $1
if line =~ OFFTAG_OPEN
codepre += 1
elsif line =~ OFFTAG_CLOSE
codepre -= 1
codepre = 0 if codepre < 0
end
elsif codepre.zero?
glyphs_textile( line, level + 1 )
else
htmlesc( line, :NoQuotes )
end
# p [level, codepre, line]
line
end
end
end
def rip_offtags( text, escape_aftertag=true, escape_line=true )
if text =~ /<.*>/
## strip and encode <pre> content
codepre, used_offtags = 0, {}
text.gsub!( OFFTAG_MATCH ) do |line|
if $3
first, offtag, aftertag = $3, $4, $5
codepre += 1
used_offtags[offtag] = true
if codepre - used_offtags.length > 0
htmlesc( line, :NoQuotes ) if escape_line
@pre_list.last << line
line = ""
else
### htmlesc is disabled between CODE tags which will be parsed with highlighter
### Regexp in formatter.rb is : /<code\s+class="(\w+)">\s?(.+)/m
### NB: some changes were made not to use $N variables, because we use "match"
### and it breaks following lines
htmlesc( aftertag, :NoQuotes ) if aftertag && escape_aftertag && !first.match(/<code\s+class="(\w+)">/)
line = "<redpre##{ @pre_list.length }>"
first.match(/<#{ OFFTAGS }([^>]*)>/)
tag = $1
$2.to_s.match(/(class\=("[^"]+"|'[^']+'))/i)
tag << " #{$1}" if $1
@pre_list << "<#{ tag }>#{ aftertag }"
end
elsif $1 and codepre > 0
if codepre - used_offtags.length > 0
htmlesc( line, :NoQuotes ) if escape_line
@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 <pre> content
text.gsub!( /<redpre#(\d+)>/ ) { @pre_list[$1.to_i] }
end
end
def inline( text )
[/^inline_/, /^glyphs_/].each do |meth_re|
@rules.each do |rule_name|
method( rule_name ).call( text ) if rule_name.to_s.match( meth_re )
end
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 )
' <a target="_blank" href="http://hobix.com/textile/#' + helpvar + '" onclick="window.open(this.href, \'popupwindow\', \'width=' + windowW + ',height=' + windowH + ',scrollbars,resizable\'); return false;">' + name + '</a><br />'
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,
'h3' => nil,
'h3' => nil,
'h4' => nil,
'h5' => nil,
'h6' => nil,
'blockquote' => ['cite']
}
def clean_html( text, tags = BASIC_TAGS )
text.gsub!( /<!\[CDATA\[/, '' )
text.gsub!( /<(\/*)(\w+)([^>]*)>/ ) 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 =~ %r{^(?!http)\w+:}
pcs << "#{prop}=\"#{$1.gsub('"', '\\"')}\""
break
end
end
end if tags[tag]
"<#{raw[1]}#{pcs.join " "}>"
else
" "
end
end
end
ALLOWED_TAGS = %w(redpre pre code notextile)
def escape_html_tags(text)
text.gsub!(%r{<(\/?([!\w]+)[^<>\n]*)(>?)}) {|m| ALLOWED_TAGS.include?($2) ? "<#{$1}#{$3}" : "&lt;#{$1}#{'&gt;' unless $3.blank?}" }
end
end