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    Farthest Frontier

    Implements {{Aligned table}}


    -- This module implements {{aligned table}}
    local p = {}
    
    local function isnotempty(s)
    	return s and s:match( '^%s*(.-)%s*$' ) ~= ''
    end
    
    function p.table(frame)
    	local args = (frame.args[3] ~= nil) and frame.args or frame:getParent().args
    	local entries = {}
    	local colclass = {}
    	local colstyle = {}
    	local cols = tonumber(args['cols']) or 2
    
    	-- create the root table
    	local root = mw.html.create('table')
    
    	-- add table style for fullwidth
    	if isnotempty(args['fullwidth']) then
    		root
    			:css('width', '100%')
    			:css('border-collapse', 'collapse')
    			:css('border-spacing', '0px 0px')
    			:css('border', 'none')
    	end
    
    	-- add table classes
    	if isnotempty(args['class']) then
    		root:addClass(args['class'])
    	end
    
    	-- add table style
    	if isnotempty(args['style']) then
    		root:cssText(args['style'])
    	end
    
    	-- build arrays with the column styles and classes
    	if isnotempty(args['leftright']) then
    		colstyle[1] = 'text-align:left;'
    		colstyle[2] = 'text-align:right;'
    	end
    	if isnotempty(args['rightleft']) then
    		colstyle[1] = 'text-align:right;'
    		colstyle[2] = 'text-align:left;'
    	end
    	for i = 1,cols do
    		colclass[ i ] = colclass[ i ] or ''
    		colstyle[ i ] = colstyle[ i ] or ''
    		if isnotempty(args['colstyle']) then
    			colstyle[ i ] = args['colstyle'] .. ';' .. colstyle[ i ]
    		end
    		if isnotempty(args['colalign' .. tostring(i)]) then
    			colstyle[ i ] = 'text-align:' .. args['colalign' .. tostring(i)] .. ';' .. colstyle[ i ]
    		elseif isnotempty(args['col' .. tostring(i) .. 'align']) then
    			colstyle[ i ] = 'text-align:' .. args['col' .. tostring(i) .. 'align'] .. ';' .. colstyle[ i ]
    		elseif isnotempty(args['align' .. tostring(i)]) then
    			colstyle[ i ] = 'text-align:' .. args['align' .. tostring(i)] .. ';' .. colstyle[ i ]
    		end
    		if isnotempty(args['colnowrap' .. tostring(i)]) then
    			colstyle[ i ] = 'white-space:nowrap;' .. colstyle[ i ]
    		elseif isnotempty(args['col' .. tostring(i) .. 'nowrap']) then
    			colstyle[ i ] = 'white-space:nowrap;' .. colstyle[ i ]
    		elseif isnotempty(args['nowrap' .. tostring(i)]) then
    			colstyle[ i ] = 'white-space:nowrap;' .. colstyle[ i ]
    		end
    		if isnotempty(args['colwidth' .. tostring(i)]) then
    			colstyle[ i ] = 'width:' .. args['colwidth' .. tostring(i)] .. ';' .. colstyle[ i ]
    		elseif isnotempty(args['col' .. tostring(i) .. 'width']) then
    			colstyle[ i ] = 'width:' .. args['col' .. tostring(i) .. 'width'] .. ';' .. colstyle[ i ]
    		elseif isnotempty(args['colwidth']) then
    			colstyle[ i ] = 'width:' .. args['colwidth'] .. ';' .. colstyle[ i ]
    		end
    		if isnotempty(args['colstyle' .. tostring(i)]) then
    			colstyle[ i ] = colstyle[ i ] .. args['colstyle' .. tostring(i)]
    		elseif isnotempty(args['col' .. tostring(i) .. 'style']) then
    			colstyle[ i ] = colstyle[ i ] .. args['col' .. tostring(i) .. 'style']
    		elseif isnotempty(args['style' .. tostring(i)]) then
    			colstyle[ i ] = colstyle[ i ] .. args['style' .. tostring(i)]
    		end
    		if isnotempty(args['colclass' .. tostring(i)]) then
    			colclass[ i ] =  args['colclass' .. tostring(i)]
    		elseif isnotempty(args['col' .. tostring(i) .. 'class']) then
    			colclass[ i ] =  args['col' .. tostring(i) .. 'class']
    		elseif isnotempty(args['class' .. tostring(i)]) then
    			colclass[ i ] =  args['class' .. tostring(i)]
    		end
    	end
    	-- compute the maximum cell index
    	local cellcount = 0
    	for k, v in pairs( args ) do
    		if type( k ) == 'number' then
    			cellcount = math.max(cellcount, k)
    		end
    	end
    	-- compute the number of rows
    	local rows = math.ceil(cellcount / cols)
    
    	-- build the table content
    	if isnotempty(args['title']) then
    		local caption = root:tag('caption')
    		caption:cssText(args['titlestyle'])
    		caption:wikitext(args['title'])
    	end
    	if isnotempty(args['above']) then
    		local row = root:tag('tr')
    		local cell = row:tag('th')
    		cell:attr('colspan', cols)
    		cell:cssText(args['abovestyle'])
    		cell:wikitext(args['above'])
    	end
    	for j=1,rows do
    		-- start a new row
    		local row = root:tag('tr')
    		if isnotempty(args['rowstyle']) then
    			row:cssText(args['rowstyle'])
    		else
    			row:css('vertical-align', 'top')
    		end
    		if isnotempty(args['rowclass']) then
    			row:addClass(args['rowclass'])
    		end
    		-- loop over the cells in the row
    		for i=1,cols do
    			local cell
    			if isnotempty(args['row' .. tostring(j) .. 'header']) then
    				cell = row:tag('th'):attr('scope','col')
    			elseif isnotempty(args['col' .. tostring(i) .. 'header']) then
    				cell = row:tag('th'):attr('scope','row')
    			else
    				cell = row:tag('td')
    			end
    			if args['class' .. tostring(j) .. '.' .. tostring(i)] then
    				cell:addClass(args['class' .. tostring(j) .. '.' .. tostring(i)])
    			else
    				if args['rowclass' .. tostring(j)] then
    					cell:addClass(args['rowclass' .. tostring(j)])
    				elseif args['row' .. tostring(j) .. 'class'] then
    					cell:addClass(args['row' .. tostring(j) .. 'class'])
    				elseif args['rowevenclass'] and math.fmod(j,2) == 0 then
    					cell:addClass(args['rowevenclass'])
    				elseif args['rowoddclass'] and math.fmod(j,2) == 1 then	
    					cell:addClass(args['rowoddclass'])
    				end
    				if colclass[i] ~= '' then
    					cell:addClass(colclass[i])
    				end
    			end
    			if args['style' .. tostring(j) .. '.' .. tostring(i)] then
    				cell:cssText(args['style' .. tostring(j) .. '.' .. tostring(i)])
    			else
    				if args['rowstyle' .. tostring(j)] then
    					cell:cssText(args['rowstyle' .. tostring(j)])
    				elseif args['rowevenstyle'] and math.fmod(j,2) == 0 then
    					cell:cssText(args['rowevenstyle'])
    				elseif args['rowoddstyle'] and math.fmod(j,2) == 1 then	
    					cell:cssText(args['rowoddstyle'])
    				elseif args['row' .. tostring(j) .. 'style'] then
    					cell:cssText(args['row' .. tostring(j) .. 'style'])
    				end
    				if isnotempty(colstyle[i]) then
    					cell:cssText(colstyle[i])
    				end
    			end
    			cell:wikitext(mw.ustring.gsub(args[cols*(j - 1) + i] or '', '^(.-)%s*$', '%1') or '')
    		end
    	end
    	-- return the root table
    	return tostring(root)
    end
    
    return p
    
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