Module:Tabs

Documentation for this module may be created at Module:Tabs/doc

local Args = require( 'Module:Args' )

function getRequiredArg( args, argName, fnName )
  return assert( args[argName], 'missing required arg for ' .. fnName .. ': ' .. argName )
end

local TabContainer = {}
TabContainer.__index = TabContainer

local TabSet = {}
TabSet.__index = TabSet

local Tab = {}
Tab.__index = Tab

local TabContent = {}
TabContent.__index = TabContent

function TabContainer.new( args )
  args = args or {}
  return setmetatable( {
    contents = {},
    args = args
  }, TabContainer )
end

function TabContainer:leftTabs( args )
  if not self.tabsLeft then
    args.target = args.target or self.args.id
    args.activation = args.activation or self.args.activation
    self.tabsLeft = TabSet.new( args )
  end

  return self.tabsLeft
end

function TabContainer:topTabs( args )
  if not self.tabsTop then
    args.target = args.target or self.args.id
    args.activation = args.activation or self.args.activation
    self.tabsTop = TabSet.new( args )
  end

  return self.tabsTop
end

function TabContainer:addTabLeftWithContent( args )
  -- normalize args so they can just be passed to everything. definitely a bad idea but...
  args.selection = getRequiredArg( args, 'contentId', 'TabContainer:addTabLeft' )
  self:leftTabs( args ):addTab( args )
  self:addContent( args )
end

function TabContainer:addTabTopWithContent( args )
  -- normalize args so they can just be passed to everything. definitely a bad idea but...
  args.selection = getRequiredArg( args, 'contentId', 'TabContainer:addTabTop' )
  self:topTabs( args ):addTab( args )
  self:addContent( args )
end

function TabContainer:addContent( args )
  self.contents[#self.contents + 1] = TabContent.new( args )
end

function TabContainer:render()
  local container = mw.html.create( 'div' )
    :addClass( 'zdw-tabcontainer zdw-box' )
  if self.args.id then container:attr( 'id', self.args.id ) end
  if self.args.width then container:css( 'width', self.args.width .. 'px' ) end
  if self.args.height then container:css( 'height', self.args.height .. 'px' ) end

  local defaults = {}

  if self.tabsLeft then
    local width = tonumber( self.args.left and self.args.left.width ) or 60
    container:addClass( 'zdw-tabcontainer--hastabsleft' )
    container:css( 'margin-left', tostring( width ) .. 'px' )
    container:tag( 'div' )
      :addClass( 'zdw-tabcontainer__tabset--left' )
      :css( 'width', tostring( width ) .. 'px' )
      :css( 'margin-left', '-' .. tostring( width + 10 ) .. 'px' )
      :wikitext( self.tabsLeft:render() )

    if self.tabsLeft.defaultTab > 0 then
      defaults[self.tabsLeft.selector] = self.tabsLeft.tabs[self.tabsLeft.defaultTab].selection
    end
  end

  if self.tabsTop then
    container:addClass( 'zdw-tabcontainer--hastabstop' )
    container:tag( 'div' )
      :addClass( 'zdw-tabcontainer__tabset--top' )
      :wikitext( self.tabsTop:render() )

    if self.tabsTop.defaultTab > 0 then
      defaults[self.tabsTop.selector] = self.tabsTop.tabs[self.tabsTop.defaultTab].selection
    end
  end

  local defaultContent = ''
  if defaults[0] then defaultContent = defaultContent .. defaults[0] end
  if defaults[1] then defaultContent = defaultContent .. ' ' .. defaults[1] end

  for _, c in ipairs( self.contents ) do
    if c.contentId == defaultContent then c.default = true end
    container:wikitext( c:render() )
  end

  container:tag( 'div' )
    :css( 'clear', 'both' )

  return tostring( container )
end

function TabSet.new( args )
  args = args or {}
  return setmetatable( {
    target = args.target,
    selector = args.selector or '0',
    activation = args.activation or 'click',
    defaultTab = args.default and (tonumber(args.default) or error('invalid arg: default must be a number')) or 1,
    tabs = {}
  }, TabSet )
end

function TabSet:addTab( args )
  local index = #self.tabs + 1
  if index == self.defaultTab then args.default = true end
  self.tabs[index] = Tab.new( args )
end

function TabSet:render()
  local tabSet = mw.html.create( 'ul' )
    :addClass( 'zdw-tabset' )
    :attr( 'data-tab-selector', self.selector )
    :attr( 'data-tab-type', self.activation )
  if self.target then tabSet:attr( 'data-tab-target', self.target ) end

  for _, tab in ipairs( self.tabs ) do
    tabSet:wikitext( tab:render() )
  end

  return tostring( tabSet )
end

function Tab.new( args )
  args = args or {}
  return setmetatable( {
    selection = getRequiredArg( args, 'selection', 'Tab.new' ),
    label = args.label or args.selection,
    args = args
  }, Tab )
end

function Tab:render()
  local tab = mw.html.create( 'li' )
    :addClass( 'zdw-tab' )
    :attr( 'data-tab-selection', self.selection:gsub( "%s", "" ) )
    :wikitext( self.label )

  if self.args.default then
    tab:addClass( 'active' )
    tab:attr( 'data-tab-default', 'true' )
  end

  return tostring( tab )
end

function TabContent.new( args )
  args = args or {}
  return setmetatable( {
    contentId = getRequiredArg( args, 'contentId', 'TabContent.new' ),
    content = args.content or args.contentId,
    args = args
  }, TabContent )
end

function TabContent:render()
  local content = mw.html.create( 'div' )
    :addClass( 'zdw-tabcontent' )
    :attr( 'data-tab-content', self.contentId )
    :wikitext( '\n' .. self.content ) -- newline is needed for tables, lists, etc.

  for k, v in ipairs( mw.text.split( self.contentId, ' ' ) ) do
    content:attr( 'data-tab-content-' .. (k - 1), v )
  end

  if self.default then
    content:addClass( 'default' )
  end

  if self.args.width then
    content:css( 'width', self.args.width .. 'px' )
  end

  return tostring( content )
end

local p = {}

p.Tabs = TabContainer

function p.tabs( frame )
  local args = Args.fromFrame( frame )
  local tabs = TabContainer.new( args )

  -- set selectors
  if args.left then args.left.selector = '0' end
  if args.top then args.top.selector = args.combine and '0' or '1' end

  -- fix default tabs if combined
  -- l\t  nil    0      #
  -- nil  nil\0  nil\0  0\#
  -- 0    0\nil  0\0    0\#
  -- #    #\0    #\0    #\0
  if args.left and args.top and args.combine then
    if args.left.default and args.left.default ~= '0' then args.top.default = '0' end
    if not args.left.default then
      if args.top.default and args.top.default ~= '0' then
        args.left.default = 0
      else
        args.top.default = 0
      end
    end
  end

  if args.left then
    local left = tabs:leftTabs( args.left )
    for _, tabArgs in ipairs( args.left ) do
      tabArgs = Args.getTable( tabArgs )
      tabArgs.selection = Args.getValue( tabArgs )
      left:addTab( tabArgs )
    end
  end

  if args.top then
    local top = tabs:topTabs( args.top )
    for _, tabArgs in ipairs( args.top ) do
      tabArgs = Args.getTable( tabArgs )
      tabArgs.selection = Args.getValue( tabArgs )
      top:addTab( tabArgs )
    end
  end
  
  for contentId, contentArgs in pairs( args.content or {} ) do -- order doesn't matter here since only one is displayed at a time
    contentArgs = Args.getTable( contentArgs )
    contentArgs.contentId = contentId
    contentArgs.content = Args.getValue( contentArgs )
    tabs:addContent( contentArgs )
  end

  return tabs:render()
end

return p