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Module:Family tree

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--[[
Implements {{Family tree}}
In this module and the template, top, right, bottom, left refer to the location of the line on a cross:
-T-
L#R
-B-
--]]
 
local p = {}
 
local borders = mw.loadData('Module:Family tree/data')
 
-- Main function
function p.main(frame)
	local args = frame:getParent().args
	local cells = {}
	for i, v in ipairs(args) do
		-- Every param is unnamed, so needs trimming
		local v_x = mw.text.trim(v)
		-- Assume all blank parameters (trimmed to 0 length) are empty block cells
		if #v_x == 0 then
			v_x = ' '
		end
		table.insert(cells,v_x)
	end
	return p._main(cells)
end
 
function p._main(cells)
	local ret = mw.html.create('table')
			:css({ ['border-spacing'] = '0',
				['line-height'] = '100%',
				['text-align'] = 'center' })
 
	local current_row = mw.html.create('tr')
	for i, v in ipairs(cells) do
		-- '_' character means "start a new row"
		-- Close current_row and add to the table
		-- Then recycle the param
		if v == '_' then
			ret:node(current_row:done())
			current_row = mw.html.create('tr')
		-- If a meta character, add a node for a block cell
		elseif borders[v] then
			block_cell(current_row,borders[v])
		-- Everything else, paste as is in a leaf
		else
			text_cell(current_row,v)
		end
	end
	-- Close current row, add to main table, close everything, return
	ret:node(current_row:done())
		:done()
	return ret
end
 
-- Meta characters used to draw lines
function block_cell(builder,cell)
	--[[
	-- We can use self closing <td /> to reduce expansion size, huehuehue
	-- Cells are:
	-- a1 a2
	-- b2 b2
	-- a1's borders create TOP and LEFT lines
	-- a2's borders create RIGHT line
	-- b1's borders create BOTTOM line
	-- Each cell is 1em square
	-- Whole table is 2em x 2em
	--]]
	builder:tag('td')
		:addClass('famtreesub')
			:tag('table')
				:tag('tr')
					:tag('td',{selfClosing = true})
						:css({ ['border-right'] = cell.top,
							['border-bottom'] = cell.left })
					:done()
					:tag('td',{selfClosing = true})
						:css({ ['border-bottom'] = cell.right })
					:done()
				:done()
				:tag('tr')
					:tag('td',{selfClosing = true})
						:css({ ['border-right'] = cell.bottom })
					:done()
					:tag('td',{selfClosing = true}):done()
				:done()
			:done()
		:done()
end
 
-- All other text
function text_cell(builder,text)
	builder:tag('td')
		:addClass('famtreeleaf')
		:attr('colspan','3')
		:wikitext(text)
		:done()
end
 
return p

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