Module: MaRuKu::Out::Latex

Includes:
REXML
Included in:
MDElement
Defined in:
lib/maruku.rb,
lib/maruku/output/to_latex.rb,
lib/maruku/ext/math/to_latex.rb,
lib/maruku/output/to_latex_entities.rb

Overview

Functions for exporting to Latex

Defined Under Namespace

Classes: LatexEntity

Constant Summary collapse

TexHeaders = 
{
1=>'section',
2=>'subsection',
3=>'subsubsection',
4=>'paragraph'}
SAFE_CHARS = 
Set.new((?a..?z).to_a + (?A..?Z).to_a)
ENTITY_TABLE = 
{}
XML_TABLE =

The following is a conversion chart for html elements, courtesy of text2html

"
<chars>
  <char num='913' name='Alpha' convertTo='$A$' />
  <char num='914' name='Beta' convertTo='$B$' />
  <char num='915' name='Gamma' convertTo='$\\Gamma$' />
  <char num='916' name='Delta' convertTo='$\\Delta$' />
  <char num='917' name='Epsilon' convertTo='$E$' />
  <char num='918' name='Zeta' convertTo='$Z$' />
  <char num='919' name='Eta' convertTo='$H$' />
  <char num='920' name='Theta' convertTo='$\\Theta$' />
  <char num='921' name='Iota' convertTo='$I$' />
  <char num='922' name='Kappa' convertTo='$K$' />
  <char num='923' name='Lambda' convertTo='$\\Lambda$' />
  <char num='924' name='Mu' convertTo='$M$' />
  <char num='925' name='Nu' convertTo='$N$' />
  <char num='926' name='Xi' convertTo='$\\Xi$' />
  <char num='927' name='Omicron' convertTo='$O$' />
  <char num='928' name='Pi' convertTo='$\\Pi$' />
  <char num='929' name='Rho' convertTo='$P$' />
  <char num='931' name='Sigma' convertTo='$\\Sigma$' />
  <char num='932' name='Tau' convertTo='$T$' />
  <char num='933' name='Upsilon' convertTo='$Y$' />
  <char num='934' name='Phi' convertTo='$\\Phi$' />
  <char num='935' name='Chi' convertTo='$X$' />
  <char num='936' name='Psi' convertTo='$\\Psi$' />
  <char num='937' name='Omega' convertTo='$\\Omega$' />
  <char num='945' name='alpha' convertTo='$\\alpha$' />
  <char num='946' name='beta' convertTo='$\\beta$' />
  <char num='947' name='gamma' convertTo='$\\gamma$' />
  <char num='948' name='delta' convertTo='$\\delta$' />
  <char num='949' name='epsilon' convertTo='$\\epsilon$' />
  <char num='950' name='zeta' convertTo='$\\zeta$' />
  <char num='951' name='eta' convertTo='$\\eta$' />
  <char num='952' name='theta' convertTo='$\\theta$' />
  <char num='953' name='iota' convertTo='$\\iota$' />
  <char num='954' name='kappa' convertTo='$\\kappa$' />
  <char num='955' name='lambda' convertTo='$\\lambda$' />
  <char num='956' name='mu' convertTo='$\\mu$' />

  <char num='957' name='nu' convertTo='$\\nu$' />
  <char num='958' name='xi' convertTo='$\\xi$' />
  <char num='959' name='omicron' convertTo='$o$' />
  <char num='960' name='pi' convertTo='$\\pi$' />
  <char num='961' name='rho' convertTo='$\\rho$' />
  <char num='963' name='sigma' convertTo='$\\sigma$' />
  <char num='964' name='tau' convertTo='$\\tau$' />
  <char num='965' name='upsilon' convertTo='$\\upsilon$' />
  <char num='966' name='phi' convertTo='$\\phi$' />

  <char num='967' name='chi' convertTo='$\\chi$' />
  <char num='968' name='psi' convertTo='$\\psi$' />
  <char num='969' name='omega' convertTo='$\\omega$' />
  <char num='962' name='sigmaf' convertTo='$\\varsigma$' />
  <char num='977' name='thetasym' convertTo='$\\vartheta$' />
  <char num='982' name='piv' convertTo='$\\varpi$' />
  <char num='8230' name='hellip' convertTo='\\ldots' />
  <char num='8242' name='prime' convertTo='$\\prime$' />
  <char num='8254' name='oline' convertTo='-' />

  <char num='8260' name='frasl' convertTo='/' />
  <char num='8472' name='weierp' convertTo='$\\wp$' />
  <char num='8465' name='image' convertTo='$\\Im$' />
  <char num='8476' name='real' convertTo='$\\Re$' />
  <char num='8501' name='alefsym' convertTo='$\\aleph$' />
  <char num='8226' name='bull' convertTo='$\\bullet$' />
  <char num='8482' name='trade' convertTo='$^{\\rm TM}$' /> <!-- \texttrademark -->
  <char num='8592' name='larr' convertTo='$\\leftarrow$' />

  <char num='8594' name='rarr' convertTo='$\\rightarrow$' />
  <char num='8593' name='uarr' convertTo='$\\uparrow$' />
  <char num='8595' name='darr' convertTo='$\\downarrow$' />
  <char num='8596' name='harr' convertTo='$\\leftrightarrow$' />
  <char num='8629' name='crarr' convertTo='$\\hookleftarrow$' />
  <char num='8657' name='uArr' convertTo='$\\Uparrow$' />
  <char num='8659' name='dArr' convertTo='$\\Downarrow$' />
  <char num='8656' name='lArr' convertTo='$\\Leftarrow$' />
  <char num='8658' name='rArr' convertTo='$\\Rightarrow$' />

  <char num='8660' name='hArr' convertTo='$\\Leftrightarrow$' />
  <char num='8704' name='forall' convertTo='$\\forall$' />
  <char num='8706' name='part' convertTo='$\\partial$' />
  <char num='8707' name='exist' convertTo='$\\exists$' />
  <char num='8709' name='empty' convertTo='$\\emptyset$' />
  <char num='8711' name='nabla' convertTo='$\\nabla$' />
  <char num='8712' name='isin' convertTo='$\\in$' />
  <char num='8715' name='ni' convertTo='$\\ni$' />
  <char num='8713' name='notin' convertTo='$\\notin$' />

  <char num='8721' name='sum' convertTo='$\\sum$' />
  <char num='8719' name='prod' convertTo='$\\prod$' />
  <char num='8722' name='minus' convertTo='$-$' />
  <char num='8727' name='lowast' convertTo='$\\ast$' />
  <char num='8730' name='radic' convertTo='$\\surd$' />
  <char num='8733' name='prop' convertTo='$\\propto$' />
  <char num='8734' name='infin' convertTo='$\\infty$' />
  <char num='8736' name='ang' convertTo='$\\angle$' />
  <char num='8743' name='and' convertTo='$\\wedge$' />

  <char num='8744' name='or' convertTo='$\\vee$' />
  <char num='8745' name='cup' convertTo='$\\cup$' />
  <char num='8746' name='cap' convertTo='$\\cap$' />
  <char num='8747' name='int' convertTo='$\\int$' />
  <char num='8756' name='there4' convertTo='$\\therefore$' package='amssymb' /> <!-- only AMS -->
  <char num='8764' name='sim' convertTo='$\\sim$' />
  <char num='8776' name='asymp' convertTo='$\\approx$' />
  <char num='8773' name='cong' convertTo='$\\cong$' />

  <char num='8800' name='ne' convertTo='$\\neq$' />
  <char num='8801' name='equiv' convertTo='$\\equiv$' />
  <char num='8804' name='le' convertTo='$\\leq$' />
  <char num='8805' name='ge' convertTo='$\\geq$' />
  <char num='8834' name='sub' convertTo='$\\subset$' />
  <char num='8835' name='sup' convertTo='$\\supset$' />
<!--	  <char num='8838' name='sube' convertTo='$\\subseteq$' />-->
  <char num='8839' name='supe' convertTo='$\\supseteq$' />
<!--	  <char num='8836' name='nsub' convertTo='$\\nsubset$'  /> <!-- only AMS -->

  <char num='8853' name='oplus' convertTo='$\\oplus$' />
  <char num='8855' name='otimes' convertTo='$\\otimes$' />
  <char num='8869' name='perp' convertTo='$\\perp$' />
  <char num='8901' name='sdot' convertTo='$\\cdot$' />
  <char num='8968' name='rceil' convertTo='$\\rceil$' />
  <char num='8969' name='lceil' convertTo='$\\lceil$' />
  <char num='8970' name='lfloor' convertTo='$\\lfloor$' />
  <char num='8971' name='rfloor' convertTo='$\\rfloor$' />
  <char num='9001' name='rang' convertTo='$\\rangle$' />

  <char num='9002' name='lang' convertTo='$\\langle$' />
  <char num='9674' name='loz' convertTo='$\\lozenge$' package='amssymb' /> <!-- only AMS -->
  <char num='9824' name='spades' convertTo='$\\spadesuit$' />
  <char num='9827' name='clubs' convertTo='$\\clubsuit$' />
  <char num='9829' name='hearts' convertTo='$\\heartsuit$' />
  <char num='9830' name='diams' convertTo='$\\diamondsuit$' />                                     
  <char num='38' name='amp' convertTo='\\@AMP' />    
<!--	  <char num='34' name='quot' convertTo='\\@DOUBLEQUOT' />  XXX -->
<char num='34' name='quot' convertTo='\"' /> 
<char num='39' name='apos' convertTo=\"'\" /> 
  <char num='169' name='copy' convertTo='\\copyright' />

  <char num='60' name='lt' convertTo='$@LT$' />
  <char num='62' name='gt' convertTo='$@GT$' />
  <char num='338' name='OElig' convertTo='\\OE' />
  <char num='339' name='oelig' convertTo='\\oe' />
  <char num='352' name='Scaron' convertTo='\\v{S}' />
  <char num='353' name='scaron' convertTo='\\v{s}' />
  <char num='376' name='Yuml' convertTo='\\\"Y' />
  <char num='710' name='circ' convertTo='\\textasciicircum' />
  <char num='732' name='tilde' convertTo='\\textasciitilde' />

  <char num='8211' name='ndash' convertTo='--' />
  <char num='8212' name='mdash' convertTo='---' />
  <char num='8216' name='lsquo' convertTo='`' />
  <char num='8217' name='rsquo' convertTo=\"'\" /> <!-- XXXX -->
  <char num='8220' name='ldquo' convertTo='``' />
  <char num='8221' name='rdquo' convertTo=\"''\" /> <!-- XXXX -->
  <char num='8224' name='dagger' convertTo='\\dag' />
  <char num='8225' name='Dagger' convertTo='\\ddag' />
  <char num='8240' name='permil' convertTo='\\permil' package='wasysym' /> <!-- wasysym package -->

  <char num='8364' name='euro' convertTo='\\euro' package='eurosym' /> <!-- eurosym package -->
  <char num='8249' name='lsaquo' convertTo='\\guilsinglleft' package='aeguill'/>
  <char num='8250' name='rsaquo' convertTo='\\guilsinglright' package='aeguill' />
<!--	  <char num='160' name='nbsp' convertTo='\\nolinebreak' />-->
  <char num='160' name='nbsp' convertTo='~' />
  <char num='161' name='iexcl' convertTo='\\textexclamdown' />
  <char num='163' name='pound' convertTo='\\pounds' />
  <char num='164' name='curren' convertTo='\\currency' package='wasysym' /> <!-- wasysym package -->
  <char num='165' name='yen' convertTo='\\textyen' package='textcomp'/> <!-- textcomp -->

  <char num='166' name='brvbar' convertTo='\\brokenvert' /> <!-- wasysym -->
  <char num='167' name='sect' convertTo='\\S' />
  <char num='171' name='laquo' convertTo='\\guillemotleft' package='aeguill'/>
  <char num='187' name='raquo' convertTo='\\guillemotright' package='aeguill'/>
  <char num='174' name='reg' convertTo='\\textregistered' />
  <char num='170' name='ordf' convertTo='\\textordfeminine' />
  <char num='172' name='not' convertTo='$\\neg$' />
<!--  <char num='176' name='deg' convertTo='$\\degree$' /> <!-- mathabx -->
  <char num='176' name='deg' convertTo='\\textdegree' package='textcomp'/>

  <char num='177' name='plusmn' convertTo='$\\pm$' />
  <char num='180' name='acute' convertTo='@QUOT' />
  <char num='181' name='micro' convertTo='$\\mu$' />
  <char num='182' name='para' convertTo='\\P' />
  <char num='183' name='middot' convertTo='$\\cdot$' />
  <char num='186' name='ordm' convertTo='\\textordmasculine' />
  <char num='162' name='cent' convertTo='\\cent' package='wasysym' /> 
  <char num='185' name='sup1' convertTo='$^1$' />

  <char num='178' name='sup2' convertTo='$^2$' />
  <char num='179' name='sup3' convertTo='$^3$' />
  <char num='189' name='frac12' convertTo='$\\frac{1}{2}$' />
  <char num='188' name='frac14' convertTo='$\\frac{1}{4}$' />
  <char num='190' name='frac34' convertTo='$\\frac{3}{4}$' />
  <char num='192' name='Agrave' convertTo='\\`A' />
  <char num='193' name='Aacute' convertTo='\\@QUOTA' />
  <char num='194' name='Acirc' convertTo='\\^A' />
  <char num='195' name='Atilde' convertTo='\\~A' />

  <char num='196' name='Auml' convertTo='\\@DOUBLEQUOTA' />
  <char num='197' name='Aring' convertTo='\\AA' />
  <char num='198' name='AElig' convertTo='\\AE' />
  <char num='199' name='Ccedil' convertTo='\\c{C}' />
  <char num='200' name='Egrave' convertTo='\\`E' />
  <char num='201' name='Eacute' convertTo='\\@QUOTE' />
  <char num='202' name='Ecirc' convertTo='\\^E' />
  <char num='203' name='Euml' convertTo='\\@DOUBLEQUOTE' />
  <char num='204' name='Igrave' convertTo='\\`I' />
  <char num='205' name='Iacute' convertTo='\\@QUOTI' />
  <char num='206' name='Icirc' convertTo='\\^I' />
  <char num='207' name='Iuml' convertTo='\\\"I' />
  <char num='208' name='ETH' convertTo='$\\eth$' /> <!-- AMS -->
  <char num='209' name='Ntilde' convertTo='\\~N' />    
  <char num='210' name='Ograve' convertTo='\\`O' />
  <char num='211' name='Oacute' convertTo='\\@QUOT O' />
  <char num='212' name='Ocirc' convertTo='\\^O' />
  <char num='213' name='Otilde' convertTo='\\~O' />
  <char num='214' name='Ouml' convertTo='\\@DOUBLEQUOTO' />
  <char num='215' name='times' convertTo='$\\times$' />
  <char num='216' name='Oslash' convertTo='\\O' />
  <char num='217' name='Ugrave' convertTo='\\`U' />
  <char num='218' name='Uacute' convertTo='\\@QUOTU' />
  <char num='219' name='Ucirc' convertTo='\\^U' />
  <char num='220' name='Uuml' convertTo='\\@DOUBLEQUOTU' />
  <char num='221' name='Yacute' convertTo='\\@QUOTY' />
  <char num='223' name='szlig' convertTo='\\ss' />
  <char num='224' name='agrave' convertTo='\\`a' />
  <char num='225' name='aacute' convertTo='\\@QUOTa' />
  <char num='226' name='acirc' convertTo='\\^a' />
  <char num='227' name='atilde' convertTo='\\~a' />
  <char num='228' name='auml' convertTo='\\@DOUBLEQUOTa' />
  <char num='229' name='aring' convertTo='\\aa' />
  <char num='230' name='aelig' convertTo='\\ae' />
  <char num='231' name='ccedil' convertTo='\\c{c}' />
  <char num='232' name='egrave' convertTo='\\`e' />
  <char num='233' name='eacute' convertTo='\\@QUOTe' />
  <char num='234' name='ecirc' convertTo='\\^e' />
  <char num='235' name='euml' convertTo='\\@DOUBLEQUOTe' />    
  <char num='236' name='igrave' convertTo='\\`i' />
  <char num='237' name='iacute' convertTo='\\@QUOTi' />
  <char num='238' name='icirc' convertTo='\\^i' />
  <char num='239' name='iuml' convertTo='\\@DOUBLEQUOTi' />
  <char num='240' name='eth' convertTo='$\\eth$' package='amssymb'/> <!-- -->
  <char num='241' name='ntilde' convertTo='\\~n' />
  <char num='242' name='ograve' convertTo='\\`o' />
  <char num='243' name='oacute' convertTo='\\@QUOTo' />
  <char num='244' name='ocirc' convertTo='\\^o' />
  <char num='245' name='otilde' convertTo='\\~o' />
  <char num='246' name='ouml' convertTo='\\@DOUBLEQUOTo' />
<!--   <char num='247' name='divide' convertTo='$\\divide$' />       -->
  <char num='248' name='oslash' convertTo='\\o' /> 
  <char num='249' name='ugrave' convertTo='\\`u' />
  <char num='250' name='uacute' convertTo='\\@QUOTu' />
  <char num='251' name='ucirc' convertTo='\\^u' />
  <char num='252' name='uuml' convertTo='\\@DOUBLEQUOTu' />
  <char num='253' name='yacute' convertTo='\\@QUOTy' />

  <char num='255' name='yuml' convertTo='\\@DOUBLEQUOTy' />                  

	<char num='222' name='THORN' convertTo='\\Thorn' package='wasysym' /> 
	<char num='254' name='thorn' convertTo='\\thorn' package='wasysym' />
</chars>"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.init_entity_table ⇒ Object

create hash @@entity_to_latex



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# File 'lib/maruku/output/to_latex_entities.rb', line 69

def Latex.init_entity_table
#		$stderr.write "Creating entity table.."
#		$stderr.flush
	doc = Document.new XML_TABLE
	doc.elements.each("//char") do |c| 
		num =  c.attributes['num'].to_i
		name =  c.attributes['name']
		package =  c.attributes['package']
		
		convert =  c.attributes['convertTo']
		convert.gsub!(/@DOUBLEQUOT/,'"')
		convert.gsub!(/@QUOT/,"'")
		convert.gsub!(/@GT/,">")
		convert.gsub!(/@LT/,"<")
		convert.gsub!(/@AMP/,"&")
		convert.freeze
		
		e = LatexEntity.new
		e.html_num = num
		e.html_entity = name
		e.latex_string = convert
		e.latex_packages = package ? package.split : []
		
		ENTITY_TABLE[num] = e
		ENTITY_TABLE[name] = e
	end
#		$stderr.puts "..done."
end

.need_entity_table ⇒ Object 



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# File 'lib/maruku/output/to_latex_entities.rb', line 64

def Latex.need_entity_table
	Latex.init_entity_table if ENTITY_TABLE.empty?
end

Instance Method Details

#array_to_latex(array, join_char = '') ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 528

def array_to_latex(array, join_char='')
	e = []
	array.each do |c|
		method = c.kind_of?(MDElement) ? 
		   "to_latex_#{c.node_type}" : "to_latex"
		
		if not c.respond_to?(method)
	#		raise "Object does not answer to #{method}: #{c.class} #{c.inspect[0,100]}"
			next
		end
		
		h =  c.send(method)
		
		if h.nil?
			raise "Nil html for #{c.inspect} created with method #{method}"
		end
		
		if h.kind_of?Array
			e = e + h
		else
			e << h
		end
	end
	
	# puts a space after commands if needed
	e.each_index do |i|
		if e[i] =~ /\\\w+\s*$/ # command
			if (s=e[i+1]) && s[0] == ?\ # space
				e[i]  = e[i] + "\\ "
			end
		end
	end
	
	e.join(join_char)
end

#children_to_latex ⇒ Object

Convert each child to html



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# File 'lib/maruku/output/to_latex.rb', line 524

def children_to_latex
	array_to_latex(@children)
end

#latex_color(s, command = 'color') ⇒ Object

colorname colorMaRuKu::Out::Latex.1,01,0.2,01,0.2,0.3



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# File 'lib/maruku/output/to_latex.rb', line 177

def latex_color(s, command='color')
	if s =~ /^\#(\w\w)(\w\w)(\w\w)$/
		r = $1.hex; g = $2.hex; b=$3.hex
		# convert from 0-255 to 0.0-1.0
		r = r / 255.0; g = g / 255.0; b = b / 255.0; 
		"\\#{command}[rgb]{%0.2f,%0.2f,%0.2f}" % [r,g,b]
	elsif s =~ /^\#(\w)(\w)(\w)$/
		r = $1.hex; g = $2.hex; b=$3.hex
		# convert from 0-15 to 0.0-1.0
		r = r / 15.0; g = g / 15.0; b = b / 15.0; 
		"\\#{command}[rgb]{%0.2f,%0.2f,%0.2f}" % [r,g,b]
	else	
		"\\#{command}{#{s}}"
	end
end

#latex_escape(source) ⇒ Object

the ultimate escaping (is much better than using verb)



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# File 'lib/maruku/output/to_latex.rb', line 345

def latex_escape(source)
	s=""; 
	
	source.each_byte do |b| 
		if b == ?\ 
			s << '~'
		elsif SAFE_CHARS.include? b
			s << b
		else
			s += "\\char%d" % b 
		end
	end
	s
end

#to_latex_abbr ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 501

def to_latex_abbr
	children_to_latex
end

#to_latex_cell ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 458

def to_latex_cell; children_to_latex end

#to_latex_code ⇒ Object

Attribute: latex_use_listings Scope: document Output: latex Summary: Support for ‘listings` package. Related: code_show_spaces, code_background_color, lang, code_lang

If the ‘latex_use_listings` attribute is specified, then code block are rendered using the `listings` package. Otherwise, a standard `verbatim` environment is used.

* If the ‘lang` attribute for the code block has been specified, it gets passed to the `listings` package using the `lstset` macro. The default lang for code blocks is specified through the `code_lang` attribute.

lstsetlanguage=ruby

Please refer to the documentation of the ‘listings` package for supported languages.

If a language is not supported, the ‘listings` package will emit a warning during the compilation. Just press enter and nothing wrong will happen.

* If the ‘code_show_spaces` is specified, than spaces and tabs will be shown using the macro:

lstsetshowspaces=true,showtabs=true

* The background color is given by ‘code_background_color`.



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# File 'lib/maruku/output/to_latex.rb', line 252

def to_latex_code;
	raw_code = self.raw_code
	
	if get_setting(:latex_use_listings)
		@doc.latex_require_package('listings')
			
		s = "\\lstset{columns=fixed,frame=shadowbox}"

		if get_setting(:code_show_spaces) 
			s+= "\\lstset{showspaces=true,showtabs=true}\n"
		else
			s+= "\\lstset{showspaces=false,showtabs=false}\n"
		end
		
		color = latex_color get_setting(:code_background_color)
		
		s+= "\\lstset{backgroundcolor=#{color}}\n" 
		
		s+= "\\lstset{basicstyle=\\ttfamily\\footnotesize}\n" 
		
		
		lang = self.attributes[:lang] || @doc.attributes[:code_lang] || '{}'
		if lang
			s += "\\lstset{language=#{lang}}\n"
		end
		
		"#{s}\n\\begin{lstlisting}\n#{raw_code}\n\\end{lstlisting}"
	else
		"\\begin{verbatim}#{raw_code}\\end{verbatim}\n"
	end
end

#to_latex_definition ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 484

def to_latex_definition		
	terms = self.terms
	definitions = self.definitions
	
	s = ""
	terms.each do |t|
		s +="\n\\item[#{t.children_to_latex}] "
	end

	definitions.each do |d|
		s += "#{d.children_to_latex} \n"
	end
	
	s
end

#to_latex_definition_list ⇒ Object

Definition lists ###



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# File 'lib/maruku/output/to_latex.rb', line 477

def to_latex_definition_list
	s = "\\begin{description}\n"
	s += children_to_latex
	s += "\\end{description}\n"
	s
end

#to_latex_email_address ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 417

def to_latex_email_address
	email = self.email
	"\\href{mailto:#{email}}{#{latex_escape(email)}}"
end

#to_latex_emphasis ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 328

def to_latex_emphasis
	"\\emph{#{children_to_latex}}"
end

#to_latex_entity ⇒ Object 



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# File 'lib/maruku/output/to_latex_entities.rb', line 28

def to_latex_entity 
	MaRuKu::Out::Latex.need_entity_table
	
	entity_name = self.entity_name

	entity = ENTITY_TABLE[entity_name]
	if not entity
		maruku_error "I don't know how to translate entity '#{entity_name}' "+
		"to LaTeX."
		return ""
	end
	replace = entity.latex_string
	
	entity.latex_packages.each do |p|
		@doc.latex_require_package p
	end
	
	if replace =~ /^\\/
		replace = replace + " "
	end
	
		if replace
		return replace
	else
		tell_user "Cannot translate entity #{entity_name.inspect} to LaTeX."
		return entity_name
	end
end

#to_latex_eqref ⇒ Object 



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# File 'lib/maruku/ext/math/to_latex.rb', line 17

def to_latex_eqref
	"\\eqref{#{self.eqid}}"
end

#to_latex_equation ⇒ Object 



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# File 'lib/maruku/ext/math/to_latex.rb', line 8

def to_latex_equation
	if self.label
		l =  "\\label{#{self.label}}"
		"\\begin{equation}\n#{self.math.strip}\n#{l}\\end{equation}\n"
	else
		"\\begin{displaymath}\n#{self.math.strip}\n\\end{displaymath}\n"
	end
end

#to_latex_footnote_reference ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 461

def to_latex_footnote_reference
	id = self.footnote_id
	f = @doc.footnotes[id]
	if f
		"\\footnote{#{f.children_to_latex.strip}} "
	else
		$stderr.puts "Could not find footnote '#{fid}'"
	end
end

#to_latex_head_cell ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 457

def to_latex_head_cell; children_to_latex end

#to_latex_header ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 290

def to_latex_header
	h = TexHeaders[self.level] || 'paragraph'
	
	title = children_to_latex
	if number = section_number
		title = number + title
	end
	
	if id = self.attributes[:id]
		# drop '#' at the beginning
		if id[0,1] == '#' then id = [1,id.size] end
		%{\\hypertarget{%s}{}\\%s*{{%s}}\\label{%s}\n\n} % [ id, h, title, id ]
	else
		%{\\%s*{%s}\n\n} % [ h, title]
	end
end

#to_latex_hrule ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 155

def to_latex_hrule; "\n\\vspace{.5em} \\hrule \\vspace{.5em}\n" end

#to_latex_im_link ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 386

def to_latex_im_link
	url = self.url

	if url[0,1] == '#'
		url = url[1,url.size]
		return "\\hyperlink{#{url}}{#{children_to_latex}}"
	else
		return "\\href{#{url}}{#{children_to_latex}}"
	end
end

#to_latex_image ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 505

def to_latex_image
	id = self.ref_id
	ref = @doc.refs[id]
	if not ref
		maruku_error "Could not find ref #{id.inspect} for image.\n"+
			"Available are: #{@docs.refs.keys.inspect}"
#			$stderr.puts "Could not find id = '#{id}'"
		""
	else
		url = ref[:url]
		$stderr.puts "Images not supported yet (#{url})"
		# "{\\bf Images not supported yet (#{latex_escape(url)})}"
		""
	end

end

#to_latex_immediate_link ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 372

def to_latex_immediate_link
	url = self.url
	text = url.gsub(/^mailto:/,'') # don't show mailto
#			gsub('~','$\sim$')
	text = latex_escape(text)
	if url[0,1] == '#'
		url = url[1,url.size]
		return "\\hyperlink{#{url}}{#{text}}"
	else

		return "\\href{#{url}}{#{text}}"
	end
end

#to_latex_inline_code ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 360

def to_latex_inline_code; 
	source = self.raw_code
	
	# Convert to printable latex chars 
	s = latex_escape(source)
	
	color = get_setting(:code_background_color)
	colorspec = latex_color(color, 'colorbox')

	"#{colorspec}{\\tt #{s}}"
end

#to_latex_inline_math ⇒ Object 



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# File 'lib/maruku/ext/math/to_latex.rb', line 4

def to_latex_inline_math
	"$#{self.math.strip}$"
end

#to_latex_li ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 318

def to_latex_li;        
	"\\item #{children_to_latex}\n"  
end

#to_latex_li_span ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 321

def to_latex_li_span;
	"\\item #{children_to_latex}\n"
end

#to_latex_linebreak ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 156

def to_latex_linebreak; "\\linebreak " end

#to_latex_link ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 397

def to_latex_link
	id = self.ref_id
	ref = @doc.refs[id]
	if not ref
		$stderr.puts "Could not find id = '#{id}'"
		return children_to_latex
	else
		url = ref[:url]
		#title = ref[:title] || 'no title'

		if url[0,1] == '#'
			url = url[1,url.size]
			return "\\hyperlink{#{url}}{#{children_to_latex}}"
		else
			return "\\href{#{url}}{#{children_to_latex}}"
		end
	end
	
end

#to_latex_ol ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 317

def to_latex_ol;        wrap_as_environment('enumerate')               end

#to_latex_paragraph ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 158

def to_latex_paragraph 
	children_to_latex+"\n\n"
end

#to_latex_quote ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 316

def to_latex_quote;        wrap_as_environment('quote')               end

#to_latex_raw_html ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 471

def to_latex_raw_html
	#'{\bf Raw HTML removed in latex version }'
	""
end

#to_latex_strong ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 325

def to_latex_strong
"\\textbf{#{children_to_latex}}"
end

#to_latex_table ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 423

def to_latex_table
	align = self.align
	num_columns = align.size

	head = @children.slice(0, num_columns)
	rows = []
	i = num_columns
	while i<@children.size
		rows << @children.slice(i, num_columns)
		i+=num_columns
	end
	
	h = {:center=>'c',:left=>'l',:right=>'r'}
	align_string = align.map{|a| h[a]}.join('|')
	
	s = "\\begin{tabular}{#{align_string}}\n"
		
		s += array_to_latex(head, '&') + "\\\\" +"\n"
		
		s += "\\hline \n"
		
		rows.each do |row|
			s += array_to_latex(row, '&') + "\\\\" +"\n"
		end
		
	s += "\\end{tabular}"
	
	# puts table in its own paragraph
	s += "\n\n"
	
	s
end

#to_latex_ul ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 308

def to_latex_ul;       
	if self.attributes[:toc]
		@doc.toc.to_latex
	else
		wrap_as_environment('itemize')
	end
end

#wrap_as_environment(name) ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 336

def wrap_as_environment(name)
"\\begin{#{name}}%
#{children_to_latex}
\\end{#{name}}\n"	
end

#wrap_as_span(c) ⇒ Object 



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# File 'lib/maruku/output/to_latex.rb', line 332

def wrap_as_span(c)
	"{#{c} #{children_to_latex}}"
end