Module:Collapsible list

Revision as of 00:46, 7 June 2018 by en>TheDJ (we need to get back to this. since module loading depends on parsercache, these pages are missing modules now and it takes long for all pages to be invalidate. Will return later.)
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Documentation for this module may be created at Module:Collapsible list/doc

Script error: Lua error: Internal error: The interpreter exited with status 127.

-- This module implements {{collapsible list}}.

local p = {}

local function getListItem( data )
    if not type( data ) == 'string' then
        return ''
    end
    return mw.ustring.format( '<li style="line-height: inherit; margin: 0">%s</li>', data )
end

-- Returns an array containing the keys of all positional arguments
-- that contain data (i.e. non-whitespace values).
local function getArgNums( args )
    local nums = {}
    for k, v in pairs( args ) do
        if type( k ) == 'number' and
            k >= 1 and
            math.floor( k ) == k and
            type( v ) == 'string' and
            mw.ustring.match( v, '%S' ) then
                table.insert( nums, k )
        end
    end
    table.sort( nums )
    return nums
end

-- Formats a list of classes, styles or other attributes.
local function formatAttributes( attrType, ... )
    local attributes = { ... }
    local nums = getArgNums( attributes )
    local t = {}
    for i, num in ipairs( nums ) do
        table.insert( t, attributes[ num ] )
    end
    if #t == 0 then
        return '' -- Return the blank string so concatenation will work.
    end
    return mw.ustring.format( ' %s="%s"', attrType, table.concat( t, ' ' ) )
end

local function buildList( args )
    -- Get the list items.
    local listItems = {}
    local argNums = getArgNums( args )
    for i, num in ipairs( argNums ) do
        table.insert( listItems, getListItem( args[ num ] ) )
    end
    if #listItems == 0 then
        return ''
    end
    listItems = table.concat( listItems )
    
    -- Get class, style and title data.
    local div1class = formatAttributes( 'class', 'NavFrame', not args.expand and 'collapsed' )
    local div1style = formatAttributes(
        'style',
        args.frame_style,
        args.framestyle,
        not ( args.frame_style or args.framestyle ) and 'border: none; padding: 0;'
    )
    local div2class = formatAttributes( 'class', 'NavHead' )
    local div2style = formatAttributes(
        'style',
        'font-size: 105%;',
        args.title_style,
        args.titlestyle,
        not ( args.title_style or args.titlestyle ) and 'background: transparent; text-align: left;'
    )
    local title = args.title or 'List'
    local ulclass = formatAttributes( 'class', 'NavContent', args.hlist and 'hlist' )
    local ulstyle = formatAttributes( 
        'style',
        not args.bullets and 'list-style: none none; margin-left: 0;',
        args.list_style,
        args.liststyle,
        not ( args.list_style or args.liststyle ) and 'text-align: left;',
        'font-size: 105%; margin-top: 0; margin-bottom: 0; line-height: inherit;'
    )
    
    -- Build the list.
    return mw.ustring.format( 
        '<div%s%s>\n<div%s%s>%s</div>\n<ul%s%s>%s</ul>\n</div>',
        div1class, div1style, div2class, div2style, title, ulclass, ulstyle, listItems
    )
end

function p.main( frame )
    local origArgs
    if frame == mw.getCurrentFrame() then
        origArgs = frame:getParent().args
        for k, v in pairs( frame.args ) do
            origArgs = frame.args
            break
        end
    else
        origArgs = frame
    end
    
    local args = {}
    for k, v in pairs( origArgs ) do
        if type( k ) == 'number' or v ~= '' then
            args[ k ] = v
        end
    end
    return buildList( args )
end

return p