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#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = Scanner.rb -- The TaskJuggler III Project Management Software
#
# Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
# by Chris Schlaeger <cs@taskjuggler.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
require 'taskjuggler/UTF8String'
require 'taskjuggler/TextParser/Scanner'
class TaskJuggler
# The RichTextScanner is used by the RichTextParser to chop the input text
# into digestable tokens. It specializes the TextScanner class for RichText
# syntax. The scanner can operate in various modes. The current mode is
# context dependent. The following modes are supported:
#
# :bop : at the begining of a paragraph.
# :bol : at the begining of a line.
# :inline : in the middle of a line
# :nowiki : ignoring all MediaWiki special tokens
# :html : read anything until </html>
# :ref : inside of a REF [[ .. ]]
# :href : inside of an HREF [ .. ]
# :func : inside of a block <[ .. ]> or inline <- .. -> function
class RichTextScanner < TextParser::Scanner
def initialize(masterFile, log)
tokenPatterns = [
# :bol mode rules
[ :LINEBREAK, /\s*\n/, :bol, method('linebreak') ],
[ nil, /\s+/, :bol, method('inlineMode') ],
# :bop mode rules
[ :PRE, / [^\n]+\n?/, :bop, method('pre') ],
[ nil, /\s*\n/, :bop, method('linebreak') ],
# :inline mode rules
[ :SPACE, /[ \t\n]+/, :inline, method('space') ],
# :bop and :bol mode rules
[ :INLINEFUNCSTART, /<-/, [ :bop, :bol, :inline ],
method('functionStart') ],
[ :BLOCKFUNCSTART, /<\[/, [ :bop, :bol ], method('functionStart') ],
[ ':TITLE*', /={2,5}/, [ :bop, :bol ], method('titleStart') ],
[ 'TITLE*END', /={2,5}/, :inline, method('titleEnd') ],
[ 'BULLET*', /\*{1,4}[ \t]+/, [ :bop, :bol ], method('bullet') ],
[ 'NUMBER*', /\#{1,4}[ \t]+/, [ :bop, :bol ], method('number') ],
[ :HLINE, /----/, [ :bop, :bol ], method('inlineMode') ],
# :bop, :bol and :inline mode rules
# The <nowiki> token puts the scanner into :nowiki mode.
[ nil, /<nowiki>/, [ :bop, :bol, :inline ], method('nowikiStart') ],
[ nil, /<html>/, [ :bop, :bol, :inline ], method('htmlStart') ],
[ :FCOLSTART, /<fcol:([a-z]+|#[0-9A-Fa-f]{3,6})>/, [ :bop, :bol,
:inline ],
method('fontColorStart') ],
[ :FCOLEND, /<\/fcol>/, [ :bop, :bol, :inline ],
method('fontColorEnd') ],
[ :QUOTES, /'{2,5}/, [ :bop, :bol, :inline ], method('quotes') ],
[ :REF, /\[\[/, [ :bop, :bol, :inline ], method('refStart') ],
[ :HREF, /\[/, [ :bop, :bol, :inline], method('hrefStart') ],
[ :WORD, /.[^ \n\t\[<']*/, [ :bop, :bol, :inline ],
method('inlineMode') ],
# :nowiki mode rules
[ nil, /<\/nowiki>/, :nowiki, method('nowikiEnd') ],
[ :WORD, /(<(?!\/nowiki>)|[^ \t\n<])+/, :nowiki ],
[ :SPACE, /[ \t]+/, :nowiki ],
[ :LINEBREAK, /\s*\n/, :nowiki ],
# :html mode rules
[ :HTMLBLOB, /(.|\n)*<\/html>/ , :html, method('htmlEnd') ],
[ :HTMLBLOB, /.*\n/ , :html ],
# :ref mode rules
[ :REFEND, /\]\]/, :ref, method('refEnd') ],
[ :WORD, /(<(?!-)|(\](?!\])|[^|<\]]))+/, :ref ],
[ :QUERY, /<-\w+->/, :ref, method('query') ],
[ :LITERAL, /./, :ref ],
# :href mode rules
[ :HREFEND, /\]/, :href, method('hrefEnd') ],
[ :WORD, /(<(?!-)|[^ \t\n\]<])+/, :href ],
[ :QUERY, /<-\w+->/, :href, method('query') ],
[ :SPACE, /[ \t\n]+/, :href ],
# :func mode rules
[ :INLINEFUNCEND, /->/ , :func, method('functionEnd') ],
[ :BLOCKFUNCEND, /\]>/, :func, method('functionEnd') ],
[ :ID, /[a-zA-Z_]\w*/, :func ],
[ :STRING, /"(\\"|[^"])*"/, :func, method('dqString') ],
[ :STRING, /'(\\'|[^'])*'/, :func, method('sqString') ],
[ nil, /[ \t\n]+/, :func ],
[ :LITERAL, /./, :func ]
]
super(masterFile, log, tokenPatterns, :bop)
end
private
def space(type, match)
if match.index("\n")
# If the match contains a linebreak we switch to :bol mode.
self.mode = :bol
# And return an empty string.
match = ''
end
[ type, match ]
end
def linebreak(type, match)
self.mode = :bop
[ type, match ]
end
def inlineMode(type, match)
self.mode = :inline
[ type, match ]
end
def titleStart(type, match)
self.mode = :inline
[ "TITLE#{match.length - 1}".intern, match ]
end
def titleEnd(type, match)
[ "TITLE#{match.length - 1}END".intern, match ]
end
def bullet(type, match)
self.mode = :inline
[ "BULLET#{match.count('*')}".intern, match ]
end
def number(type, match)
self.mode = :inline
[ "NUMBER#{match.count('#')}".intern, match ]
end
def fontColorStart(type, match)
self.mode = :inline
# Extract color name from <fcol:colname>
colName = match[6..-2]
if colName =~ /#([0-9A-Fa-f]{3}|[0-9A-Fa-f]{6})/
# We've got a valid hex number.
else
validColors = %w( black maroon green olive navy purple teal silver
gray red lime yellow blue fuchsia aqua white )
unless validColors.include?(colName)
error('bad_color_name',
"#{colName} is not a supported color. Use one of " +
"#{validColors.join(', ')} or #RGB where 'R', 'G' and 'B' " +
"are one or two digit hexadecimal numbers.")
end
end
[ type, colName ]
end
def fontColorEnd(type, match)
[ type, match ]
end
def quotes(type, match)
self.mode = :inline
types = [ nil, nil, :ITALIC, :BOLD , :CODE, :BOLDITALIC ]
[ types[match.length], match ]
end
def htmlStart(type, match)
self.mode = :html
[ type, match ]
end
def htmlEnd(type, match)
self.mode = :inline
[ type, match[0..-8] ]
end
def nowikiStart(type, match)
self.mode = :nowiki
[ type, match ]
end
def nowikiEnd(type, match)
self.mode = :inline
[ type, match ]
end
def functionStart(type, match)
# When restoring :bol or :bop mode, we need to switch to :inline mode.
@funcLastMode = (@scannerMode == :bop || @scannerMode == :bol) ?
:inline : @scannerMode
self.mode = :func
[ type, match ]
end
def functionEnd(type, match)
self.mode = @funcLastMode
@funcLastMode = nil
[ type, match ]
end
def pre(type, match)
[ type, match[1..-1] ]
end
def dqString(type, match)
# Remove first and last character and remove backslashes from quoted
# double quotes.
[ type, match[1..-2].gsub(/\\"/, '"') ]
end
def sqString(type, match)
# Remove first and last character and remove backslashes from quoted
# single quotes.
[ type, match[1..-2].gsub(/\\'/, "'") ]
end
def query(type, match)
# Remove <- and ->.
[ type, match[2..-3] ]
end
def hrefStart(type, match)
# When restoring :bol or :bop mode, we need to switch to :inline mode.
@hrefLastMode = (@scannerMode == :bop || @scannerMode == :bol) ?
:inline : @scannerMode
self.mode = :href
[ type, match ]
end
def hrefEnd(type, match)
self.mode = @hrefLastMode
@hrefLastMode = nil
[ type, match ]
end
def refStart(type, match)
self.mode = :ref
[ type, match ]
end
def refEnd(type, match)
self.mode = :inline
[ type, match ]
end
end
end
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