Template:Row indexer

require('Module:No globals'); local p={}

local count = 0; -- initial values local hcount = count;

--[[--------------------------< G E T _ C O U N T >------------------------------------------------------------

returns a counter value according to the keyword extracted from the table; maintains count and hcount

The keywords have the meanings: _row_count: use row counter value (count); the hold counter (hcount) is same as count _row_count_hold: use the value currently assigned to hcount; bump count but do not bump hcount

]]

local function get_count (keyword) count = count + 1; -- always bump the count

if '_row_count' == keyword then -- bump hcount, return new count value hcount = count; return count; elseif '_row_count_hold' == keyword then -- current hcount value without increment return hcount; end end

--[[--------------------------< R O W _ C O U N T E R >--------------------------------------------------------

replaces keywords _row_count and _row_count_hold from the table in frame.args[1]

]]

function p.row_indexer (frame) if not frame.args[1]:match ('^%s*\127[^\127]*UNIQ%-%-nowiki%-%x%x%x%x%x%x%x%x%-QINU[^\127]*\127%s*$') then -- make sure that what we get for input has been wrapped in ... tags return 'error: missing nowiki tags'; end

local tbl_str = mw.text.unstripNoWiki (frame.args[1]); -- get an already rendered table from whereever ... put it

tbl_str = tbl_str:gsub ('<', '<'); -- replace these character entities with their actual characters tbl_str = tbl_str:gsub ('>', '>'); -- mw.text.decode (tbl_str); is too aggressive

while (tbl_str:find ('_row_count[^%s|]*')) do -- if there is at least one of our special reserved words tbl_str = tbl_str:gsub ('_row_count[^%s|]*', get_count, 1); -- replace it with a count end return frame:preprocess (tbl_str); -- done

end

return p;