Module:Italic title

-- This module implements {{italic title}}.
 
local p = {}
 
function p.main(frame)
    -- Process the arguments.
    local args
    if frame == mw.getCurrentFrame() then
        args = frame:getParent().args
        for k, v in pairs(frame.args) do
            args = frame.args
            break
        end
    else
        args = frame
    end    
 
    local title = mw.title.getCurrentTitle() -- Get the current page object.
    -- Find the parts before and after the disambiguation parentheses, if any.
    local prefix, parentheses = mw.ustring.match(title.text, '^(.+) (%([^%(%)]+%))$')
    -- If parentheses were found, italicise only the part before them. Otherwise
    -- italicise the whole title.
    local result
    if prefix and parentheses and args.all ~= 'yes' then
        result = "''" .. prefix .. "'' " .. parentheses
    else
        result = "''" .. title.text .. "''"
    end
    -- Add the namespace if it exists.
    if title.nsText and title.nsText ~= "" then
        result = title.nsText .. ':' .. result
    end
    -- Call displaytitle with the text we generated.
    return mw.getCurrentFrame():callParserFunction( 'DISPLAYTITLE', result )
end    
 
return p