-----------------------------------------------------------------------
--         FILE:  xindex-cfg.lua
--  DESCRIPTION:  configuration file for xindex.lua
-- REQUIREMENTS:  
--       AUTHOR:  Herbert Voß
--      LICENSE:  LPPL1.3
--
-- $Id: xindex-dtk.lua 8 2026-04-09 18:49:35Z herbert $
-----------------------------------------------------------------------

if not modules then modules = { } end 
modules ['xindex-cfg'] = {
      version = 1.06,
      comment = "DTK configuration to xindex.lua",
       author = "Herbert Voss",
    copyright = "Herbert Voss",
      license = "LPPL 1.3"
}

itemPageDelimiter = ""     -- Hello, 14
compressPages     = true    -- something like 12--15, instead of 12,13,14,15. the |( ... |) syntax is still valid
fCompress	  = true    -- 3f -> page 3, 4 and 3ff -> page 3, 4, 5
minCompress       = 3       -- 14--17 or 
numericPage       = true    -- for non numerical pagenumbers, like "VI-17"
sublabels         = {"-","--","---",""} -- for the sub(sub(sub-items
pageNoPrefixDel   = ""      -- a delimiter for page numbers like "VI-17"  -- not used !!!
rangeSymbol       = "--"
indexOpening      = "" --[[\providecommand*\lettergroupDefault[1]{}
\providecommand*\lettergroup[1]{%
      \par\textbf{#1}\par
      \nopagebreak
  } 
]]
idxnewletter      = "\\textbf"  -- Only valid if -n is not set
envStart          = "\\begin{theindex}"  
envStop           = "\\end{theindex}"
language          = "de"


function specialGetPageList(v,hyperpage)
  local Pages = {}
  if v["pages"] then
    table.sort(v["pages"],pageCompare)-- nur nötig, da User manuell eine Zeile einfügen kann
    if specialCompressPageList then
      Pages = specialCompressPageList(v["pages"])
    else
      Pages = compressPageList(v["pages"])
    end
    local pageNo
    if hyperpage then
        if string.find(v["pages"][1]["special"],"hyperxindexformat") then
          pageNo = v["pages"][1]["special"].."{"..checkFF(Pages[1]["number"].."}")
        else
          pageNo = "\\hyperpage{"..checkFF(Pages[1]["number"]).."}"
        end
      for i=2,#Pages do
        if string.find(v["pages"][i]["special"],"hyperxindexformat") then
          pageNo = pageNo..", "..v["pages"][i]["special"].."{"..checkFF(Pages[i]["number"].."}")
        else
          pageNo = pageNo..", \\hyperpage{"..checkFF(Pages[i]["number"]).."}"
        end
--        Pages[i] = nil
      end
    else
      if args_v then print("getPageList: "..tostring(Pages[1]["special"])..tostring(Pages[1]["number"])) end 
      if (Pages[1]["special"] == nil) or (Pages[1]["number"] == nil) then return ""  end 
      if #Pages == 1 then
        return "\\relax "..Pages[1]["number"].."\\@nil"
      else        
        pageNo = "\\relax "..Pages[1]["number"] 
        for i=2,#Pages do
          if Pages[i]["number"] then
            pageNo = pageNo..", "..Pages[i]["number"]
            Pages[i] = {}
          end
        end
        pageNo = pageNo.."\\@nil" -- add \@nil
      end
      return pageNo
    end
  else
    return ""
  end
end

function specialItemOutput(last, v, hyperpage)
  local lastItems = last
  local currentItems = {}
  local Entry = v["Entry"]
  local name = getItem(Entry,0)
  local address = getItem(Entry,1)
  outFile:write("  \\item "..name..itemPageDelimiter.."\n")
  str = "    \\subitem "..itemPageDelimiter.." "..address..getPageList(v,hyperpage).."\n"
  for i, str0 in ipairs(escape_chars) do       -- undo the escape char setting
    str = str:gsub(str0[2],str0[3])
  end
  outFile:write(str)
  return last
end