Module: Omml2Mathml

Defined in:
lib/omml2mathml.rb,
lib/omml2mathml/convert.rb,
lib/omml2mathml/version.rb

Constant Summary collapse

VERSION = 
"0.0.10".freeze

Class Method Summary collapse

Class Method Details

.convert(filename) ⇒ Object 



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# File 'lib/omml2mathml/convert.rb', line 5

def convert(filename)
@tags = %w{
acc
accPr
aln
alnScr
argPr
argSz
bar
barPr
baseJc
begChr
borderBox
borderBoxPr
box
boxPr
brk
brkBin
brkBinSub
cGp
cGpRule
chr
count
cSp
ctrlPr
d
defJc
deg
degHide
den
diff
dispDef
dPr
e
endChr
eqArr
eqArrPr
f
fName
fPr
func
funcPr
groupChr
groupChrPr
grow
hideBot
hideLeft
hideRight
hideTop
interSp
intLim
intraSp
jc
lim
limLoc
limLow
limLowPr
limUpp
limUppPr
lit
lMargin
m
mathFont
mathPr
maxDist
mc
mcJc
mcPr
mcs
mPr
mr
nary
naryLim
naryPr
noBreak
nor
num
objDist
oMath
oMathPara
oMathParaPr
opEmu
phant
phantPr
plcHide
pos
postSp
preSp
r
rad
radPr
rMargin
rPr
rSp
rSpRule
scr
sepChr
show
shp
smallFrac
sPre
sPrePr
sSub
sSubPr
sSubSup
sSubSupPr
sSup
sSupPr
strikeBLTR
strikeH
strikeTLBR
strikeV
sty
sub
subHide
sup
supHide
t
transp
type
vertJc
wrapIndent
wrapRight
zeroAsc
zeroDesc
zeroWid
}

@mathml = {}
@tags.each do |t| 
  @mathml["m_#{t.downcase}"] = t
end

  html = Nokogiri::HTML.parse(File.read(filename, encoding: "utf-8").
                              gsub(/\r/, "").gsub(/<m:/, "<m_").
                              gsub(/<\/m:/, "</m_").
                              gsub(/<!\[if !msEquation\]>/,
                                   "<!--if !msEquation-->"))
  @xslt = Nokogiri::XSLT(File.open(File.join(File.dirname(__FILE__), "xhtml-mathml.xsl"), "rb"))
  html.traverse do |n|
    if n.comment?
      if /^\[if gte msEquation 12\]>/.match n.text 
        n.replace(n.text.sub(/\[if gte msEquation 12\]>/, "").
                  sub(/<!\[endif\]/, ""))
      elsif /^if !msEquation/.match n.text
        n.next.remove
        n.remove
      else
        n.remove
      end
    end
  end
  xml = Nokogiri::XML(html.to_xhtml)
  ns = xml.root.add_namespace 'm', "http://schemas.microsoft.com/office/2004/12/omml"
  xml.traverse do |t|
    if t.element? && @mathml.has_key?(t.name)
      t.name = @mathml[t.name]
      t.namespace = ns
    end
  end
  #xml.xpath("//xmlns:link | //xmlns:style | //*[@class = 'MsoToc1'] | //*[@class = 'MsoToc2'] |//*[@class = 'MsoToc3'] |//*[@class = 'MsoToc4'] |//*[@class = 'MsoToc5'] |//*[@class = 'MsoToc6'] |//*[@class = 'MsoToc7'] |//*[@class = 'MsoToc8'] |//*[@class = 'MsoToc9'] ").each { |x| x.remove }
  xml.xpath("//*[local-name()='oMath' or local-name()='oMathPara']").each do |x|
    # prepare input: delete xmlns & change
    input = Nokogiri::XML(x.to_xml.sub(/<m:(oMath|oMathPara)>/,
                                       "<m:\\1 xmlns:m='http://schemas.openxmlformats.org/officeDocument/2006/math'>"))
    out = @xslt.transform(input)
    mml = out.to_xml.gsub(/<\?xml[^>]+>/, '').
      gsub(%r{<([^:/! >]+ xmlns="http://www.w3.org/1998/Math/MathML")},
           "<mml:\\1").
      gsub(%r{<([^:/!>]+)>}, "<mml:\\1>").
      gsub(%r{</([^:/!>]+)>}, "</mml:\\1>").
      gsub(%r{ xmlns="http://www.w3.org/1998/Math/MathML"}, "").
      gsub(%r{ xmlns:mml="http://www.w3.org/1998/Math/MathML"}, "").
      gsub(%r{ xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"}, "").
      gsub(%r{ xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"}, "")
    x.replace("<mml:math>#{mml}</mml:math>")
  end
  xml.to_s
end