--[[
Sample plugin file for highlight 3.9
]]

Description="Add tooltips based on a ctags file (default input file: tags)"

-- optional parameter: syntax description
function syntaxUpdate(desc)
  
  if (HL_OUTPUT ~= HL_FORMAT_HTML and HL_OUTPUT ~= HL_FORMAT_XHTML) then
      return
  end

  function string:split(sep)
         local sep, fields = sep or ":", {}
         local pattern = string.format("([^%s]+)", sep)
         self:gsub(pattern, function(c) fields[#fields+1] = c end)
         return fields
  end

--tbd:
--case 'F': return	"file";
--case 'g': return	"enumeration name";
--case 'n': return	"namespace";
--case 'p': return	"function prototype";
--case 's': return	"structure name";
--case 't': return	"typedef";
--case 'u': return	"union name";
--case 'v': return	"variable";

  --use highlight file reader??
  --tagsfile=ReadFile('tags')
  --if (#tagsfile==0) then return end
  --lines=string.split(tagsfile, '\n')

  knowntags={}

  if #HL_INPUT_FILE==0 then HL_INPUT_FILE='tags' end
  --print("file:" .. HL_INPUT_FILE)
  file = assert(io.open(HL_INPUT_FILE, "r"))

  for line in file:lines() do
    if line[1]~='!' then
      items=string.split(line, '\t')
      if #items==4 then
	if items[4]=='d' then
	  knowntags[items[1]] = 'define | '.. items[2]
	end
      elseif #items==6 then
	if items[5]=='e' then
	   knowntags[items[1]] = 'enumerator | '..items[6] ..' | '.. items[2]
	 elseif items[5]=='m' then
	   knowntags[items[1]] = 'member | '..items[6] ..' | '.. items[2]
	 elseif items[5]=='c' then
	   knowntags[items[1]] = 'class | '..items[6] ..' | '.. items[2]
	 elseif items[5]=='f' then
	  knowntags[items[1]] = 'function | '..items[6] ..' | '.. items[2]
	end
	end
    end
  end


  function Decorate(token, state, kwclass)

    if ( state ~= HL_STANDARD and state ~= HL_KEYWORD and state ~=HL_PREPROC) then
      return
    end

    for k,v in pairs(knowntags) do
      if k==token  then
	return '<span title="'..v..'">'..token .. '</span>'
      end
    end

  end
end


Plugins={

  { Type="lang", Chunk=syntaxUpdate },

}