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# BBCode
#
# Copyright (c) 2002 Thomas-Ivo Heinen
#
# This module is free software. You may use, modify, and/or redistribute this
# software under the same terms as Ruby.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.
#
module ANSI
# TODO: Integrate BBCode with Code module.
# The BBCode module helps ease the separation of core and frontend with the
# core (or submodules) being still able to say, what colors shall be used
# in it's responses. This is achieved by encoding formatting information
# using the BBCode tokens. This enables you to "pipe" layout information
# such as colors, style, font, size and alignment through the core to
# the frontend.
#
# Additionally it converts markups/codes between ANSI, HTML and BBCode
# almost freely ;)
#
# # Converting a bbcode string to ANSI and XHTML
# str = "this is [COLOR=red]red[/COLOR], this is [B]bold[/B]"
# print( BBCode.bbcode_to_ansi(str) )
# print( BBCode.bbcode_to_html(str) )
#
module BBCode
## ANSIname => ANSIcode LUT
ANSINAME2CODE= { "reset" => "\e[0m", "bold" => "\e[1m",
"underline" => "\e[4m", "blink" => "\e[5m",
"reverse" => "\e[7m", "invisible" => "\e[8m",
"black" => "\e[0;30m", "darkgrey" => "\e[1;30m",
"red" => "\e[0;31m", "lightred" => "\e[1;31m",
"green" => "\e[0;32m", "lightgreen" => "\e[1;32m",
"brown" => "\e[0;33m", "yellow" => "\e[1;33m",
"blue" => "\e[0;34m", "lightblue" => "\e[1;34m",
"purple" => "\e[0;35m", "magenta" => "\e[1;35m",
"cyan" => "\e[1;36m", "lightcyan" => "\e[1;36m",
"grey" => "\e[0;37m", "white" => "\e[1;37m",
"bgblack" => "\e[40m", "bgred" => "\e[41m",
"bggreen" => "\e[42m", "bgyellow" => "\e[43m",
"bgblue" => "\e[44m", "bgmagenta" => "\e[45m",
"bgcyan" => "\e[46m", "bgwhite" => "\e[47m"
}
## BBColor => ANSIname LUT
BBCOLOR2ANSI = { "skyblue" => "blue", "royalblue" => "blue",
"blue" => "blue", "darkblue" => "blue",
"orange" => "red", "orangered" => "red",
"crimson" => "red", "red" => "lightred",
"firebrick" => "red", "darkred" => "red",
"green" => "green", "limegreen" => "green",
"seagreen" => "green", "darkgreen" => "green",
"deeppink" => "magenta", "tomato" => "red",
"coral" => "cyan", "purple" => "purple",
"indigo" => "blue", "burlywood" => "red",
"sandybrown"=> "red", "sierra" => "sierra",
"chocolate" => "brown", "teal" => "teal",
"silver" => "white",
"black" => "black", "yellow" => "yellow",
"magenta" => "magenta", "cyan" => "cyan",
"white" => "white"
}
## ANSInames => BBCode LUT
ANSINAME2BBCODE = { "bold" => "B", "underline" => "U", "reverse" => "I",
"red" => "COLOR=red", "blue" => "COLOR=blue",
"green" => "COLOR=green", "cyan" => "COLOR=cyan",
"magenta"=> "COLOR=deeppink", "purple" => "COLOR=purple",
"black" => "COLOR=black", "white" => "COLOR=white",
"yellow" => "COLOR=yellow", "brown" => "COLOR=chocolate"
}
## Needed for alignments
@@width = 80
# ---------------------------
# Returns the ANSI sequence for given color, if existant
def BBCode.ansi(colorname)
colorname.strip!
return ANSINAME2CODE[ colorname.downcase ]
end
# --- strip_bbcode( string )
# Will strip any BBCode tags from the given string.
def BBCode.strip_bbcode(string)
string.strip!
return string.gsub(/\[[A-Za-z0-9\/=]+\]/, "")
end
# Returns the string with all ansi escape sequences converted to BBCodes
def BBCode.ansi_to_bbcode(string)
return "" if string.nil? || string.to_s.strip.empty?
result = ""
tagstack = []
## Iterate over input lines
string.split("\n").each do |line|
## Iterate over found ansi sequences
line.scan(/\e\[[0-9;]+m/).each do |seq|
ansiname = ANSINAME2CODE.invert["#{seq}"]
if !ansiname && seq =~ /^\e\[(\d+)m$/
newseq = "\e[0;#{$1}m"
ansiname = ANSINAME2CODE.invert[newseq]
end
## Pop last tag and form closing tag
if ansiname == "reset"
lasttag = tagstack.pop
if lasttag
bbname = "/" + String.new( lasttag.split("=")[0] )
else
bbname = nil
end
## Get corresponding BBCode tag + Push to stack
else
bbname = ANSINAME2BBCODE[ansiname]
tagstack.push(bbname)
end
## Replace ansi sequence by BBCode tag
replace = bbname && sprintf("[%s]", bbname) || ""
line.sub!(seq, replace)
end
## Append converted line
result << sprintf("%s\n", line)
end
## Some tags are unclosed
while !tagstack.empty?
result << sprintf("[/%s]", String.new(tagstack.pop.split("=")[0]) )
end
return result
end
# Converts a BBCode string to one with ANSI sequences.
# Returns the string with all formatting instructions in BBCodes converted
# to ANSI code sequences / aligned with spaces to specified width.
def BBCode.bbcode_to_ansi(string, usecolors = true)
return "" if string.nil? || string.to_s.strip.empty?
result = ""
return BBCode.strip_bbcode(string) if !usecolors
## Iterate over lines
string.split("\n").each do |line|
## TODO: stacking? other styles!
ANSINAME2BBCODE.each do |key,val|
line.gsub!(/\[#{val}\]/, ANSINAME2CODE[key])
line.gsub!(/\[\/#{val}\]/, ANSINAME2CODE["reset"])
end
## Fonttypes and sizes not available
line.gsub!(/\[SIZE=\d\]/, "")
line.gsub!(/\[\/SIZE\]/, "")
line.gsub!(/\[FONT=[^\]]*\]/, "")
line.gsub!(/\[\/FONT\]/, "")
## Color-mapping
colors = line.scan(/\[COLOR=(.*?)\]/i)
colors = colors.collect{|s| s[0].to_s} if !colors.nil?
colors.each do |col|
name = BBCOLOR2ANSI[col.downcase]
name = BBCOLOR2ANSI["white"] if name.nil?
code = ANSINAME2CODE[name]
line.gsub!(/\[COLOR=#{col}\]/i, code)
end
line.gsub!(/\[\/COLOR\]/, ANSINAME2CODE["reset"])
## TODO: Alignment
## TODO: IMGs
## TODO: EMAILs
## TODO: URLs
## TODO: QUOTEs
## TODO: LISTs
result << sprintf("%s\n", line)
end
return result
end
# Converts a HTML string into one with BBCode markup (TODO)
# Returns the (X)HTML markup string as BBCode
def BBCode.html_to_bbcode(string)
return "" if string.nil? || string.to_s.strip.empty?
result = ""
## Iterate over lines
string.split(/<br *\/?>/i).each do |line|
styles = { "strong" => "b", "b" => "b",
"em" => "i", "i" => "i",
"u" => "u" }
## preserve B, I, U
styles.each do |html,code|
line.gsub!(/<#{html}>/i, "[#{code.upcase}]")
line.gsub!(/<\/#{html}>/i, "[/#{code.upcase}]")
end
## TODO: COLORs
## TODO: SIZEs
## TODO: FONTs
## EMAIL
line.gsub!(/<a +href *= *\"mailto:(.*?)\".*?>.*?<\/a>/i, "[EMAIL]\\1[/EMAIL]")
## URL
line.gsub!(/<a +href *= *\"((?:https?|ftp):\/\/.*?)\".*?>(.*?)<\/a>/i, "[URL=\\1]\\2[/URL]")
## Other refs + closing tags => throw away
line.gsub!(/<a +href *= *\".*?\".*?>/i, "")
line.gsub!(/<\/a>/i, "")
## IMG
#line.gsub!(/<img +src *= *\"(.*?)\".*?\/?>/i, "[IMG=\\1]")
line.gsub!(/<img +src *= *\"(.*?)\".*?\/?>/i, "[IMG]\\1[/IMG]")
## CENTER (right/left??)
line.gsub!(/<center>/i, "[ALIGN=center]")
line.gsub!(/<\/center>/i, "[/ALIGN]")
## QUOTE
line.gsub!(/<(?:xmp|pre)>/i, "[QUOTE]")
line.gsub!(/<\/(?:xmp|pre)>/i, "[/QUOTE]")
## LIST
line.gsub!(/<ul>/i, "\n[LIST]\n")
line.gsub!(/<\/ul>/i, "\n[/LIST]\n")
line.gsub!(/<li *\/?> */i, "\n[*] ")
## Unkown tags => throw away
line.gsub!(/<.*? *\/?>/, "")
result << sprintf("%s<br />\n", line)
end
return result.gsub!(/<br *\/?>/i, "\n")
end
# Converts a BBCode string to one with HTML markup.
# Returns the string with all formatting instructions in
# BBCodes converted to XHTML markups.
def BBCode.bbcode_to_html(string)
return "" if string.nil? || string.to_s.strip.empty?
result = ""
quote = 0
## Iterate over lines
string.split("\n").each do |line|
styles = { "b" => "strong", "i" => "em", "u" => "u" }
## preserve B, I, U
styles.each do |code,html|
line.gsub!(/\[#{code}\]/i, "<#{html}>")
line.gsub!(/\[\/#{code}\]/i, "</#{html}>")
end
## COLOR => font color=... (TODO: should be numeric!)
line.gsub!(/\[COLOR=(.*?)\]/i, "<font color=\"\\1\">")
line.gsub!(/\[\/COLOR\]/i, "</font>")
## SIZE => font size=...
line.gsub!(/\[SIZE=(.*?)\]/i, "<font size=\"\\1\">")
line.gsub!(/\[\/SIZE\]/i, "</font>")
## URL
line.gsub!(/\[URL\]([^\[]+?)\[\/URL\]/i, "<a href=\"\\1\">\\1</a>")
line.gsub!(/\[URL=(.*?)\](.+?)\[\/URL\]/i, "<a href=\"\\1\">\\2</a>")
## IMG
line.gsub!(/\[IMG=(.*?)\]/i, "<img src=\"\\1\" />")
## ALIGN=center (TODO: right, left)
line.gsub!(/\[ALIGN=center\]/i, "<center>")
line.gsub!(/\[ALIGN=right\]/i, "<center>")
line.gsub!(/\[ALIGN=left\]/i, "<center>")
line.gsub!(/\[\/ALIGN\]/i, "</center>")
## QUOTE
quote+=1 if line =~ /\[QUOTE\]/i
quote-=1 if (line =~ /\[\/QUOTE\]/i) && (quote > -1)
line.gsub!(/\[QUOTE\]/i, "<pre>\n")
line.gsub!(/\[\/QUOTE\]/i, "</pre>\n")
line.gsub!(/^/, ">"*quote) if quote > 0
## EMAIL
line.gsub!(/\[EMAIL\](.*?)\[\/EMAIL\]/i, "<a href=\"mailto:\\1\">\\1</a>")
## LIST (TODO: LIST=1, LIST=A)
line.gsub!(/\[LIST(?:=(.*?))?\]/i, "\n<ul>\n")
line.gsub!(/\[\/LIST\]/i, "\n</ul>\n")
line.gsub!(/\[\*\]/i, "\n<li />")
## FONT => font ??????
## ?BLUR?, FADE?
result << sprintf("%s<br />\n", line)
end
return result
end
# -- Transitive methods ---------------
# Converts an ANSI string to one with HTML markup.
# Returns the string with ANSI code sequences converted to XHTML markup.
def BBCode.ansi_to_html(string)
bbcoded = BBCode.ansi_to_bbcode(string )
htmled = BBCode.bbcode_to_html(bbcoded)
return htmled
end
# Returns the (X)HTML markup code as ANSI sequences
def BBCode.html_to_ansi(string)
bbcoded = BBCode.html_to_bbcode(string )
ansied = BBCode.bbcode_to_ansi(bbcoded)
return ansied
end
end #module BBCode
end
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