模块:In5

This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.

This is a Lua implementation of the {{in5}} template. Please see the template page for documentation.

-- This module implements {{in5}}.

local p = {}

function p.in5(frame)
    local indent = frame.args[1]
    -- Trim whitespace and convert to number. Default to 5 if not present,
    -- as per the template title.
    indent = tonumber( mw.text.trim(indent) ) or 5
    -- Round down to nearest integer. Decimal values produce funky results
    -- from the original template, but there's no need for us to replicate that.
    indent = math.floor( indent )
    -- Don't output anything for zero or less. Again, there was some funky output
    -- here for negatives, but now we're in Lua we should use sane defaults.
    if indent <= 0 then
        return
    end
    
    local base = '&nbsp; '
    local modulo = '&nbsp;'
 
--[[
    Indent values and the corresponding values for base and modulo:

    indent  base    modulo
    1       0       1
    2       0       2
    3       1       1
    4       1       2
    5       2       1
    6       2       2
    7       3       1
    8       3       2
    9       4       1
    10      4       2
]]
    
    local baseNum = math.floor( (indent - 1) / 2 )
    local modNum = math.fmod( indent - 1 , 2 ) + 1
    
    return mw.ustring.rep( base, baseNum) .. mw.ustring.rep( modulo, modNum )
end

return p