StyleCSV.lua

-- Anytime a file is switched, check to see if it needs styled
npp.AddEventHandler("OnSwitchFile", function(filename, bufferid)
 if npp:GetExtPart() == ".csv" then
 -- Add the event handler for our custom style function
 npp.AddEventHandler("OnStyle", StyleCSV)
 
 -- Make sure to set the lexer as a custom container
 editor.Lexer = SCLEX_CONTAINER
 
 -- Set up the styles as appropriate
 editor.StyleBack[1] = 0xffffff
 editor.StyleBack[2] = 0xC0D9AF
 editor.StyleEOLFilled[1] = true
 editor.StyleEOLFilled[2] = true
 
 -- Clear any style and re-lex the entire document
 editor:ClearDocumentStyle()
 editor:Colourise(0, -1)
 
 -- Set any other options, for this styler the caret line is ugly
 editor.CaretLineVisible = false
 else
 -- Can remove the handler if it's not needed
 npp.RemoveEventHandler("OnStyle", StyleCSV)
 editor.CaretLineVisible = true
 end

 return false
end)

-- A simplified lexer - style the line according to the line number
function StyleCSV(styler)
 local lineStart = editor:LineFromPosition(styler.startPos)
 local lineEnd = editor:LineFromPosition(styler.startPos + styler.lengthDoc)
 editor:StartStyling(styler.startPos, 0 --[[ unused --]])
 for line=lineStart,lineEnd,1 do
 local lengthLine = editor:PositionFromLine(line+1) - editor:PositionFromLine(line)
 if line % 2 == 0 then
 editor:SetStyling(lengthLine, 1)
 else
 editor:SetStyling(lengthLine, 2)
 end
 end
end