-- This module implements {{key press}}.  local kbdPrefix =  '<kbd class=' ..  '"keyboard-key nowrap" ' ..  'style="border: 1px solid #aaa; ' ..  -- The following is an expansion of {{border-radius|0.2em}}  '-moz-border-radius: 0.2em; -webkit-border-radius: 0.2em; border-radius: 0.2em; ' ..  -- The following is an expansion of {{box-shadow|0.1em|0.1em|0.2em|rgba(0,0,0,0.1)}}  '-moz-box-shadow: 0.1em 0.1em 0.2em rgba(0,0,0,0.1); -webkit-box-shadow: 0.1em 0.1em 0.2em rgba(0,0,0,0.1); box-shadow: 0.1em 0.1em 0.2em rgba(0,0,0,0.1); ' ..  'background-color: #f9f9f9; ' ..  -- The following is an expansion of {{linear-gradient|top|#eee, #f9f9f9, #eee}}  'background-image: -moz-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -o-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: -webkit-linear-gradient(top, #eee, #f9f9f9, #eee); background-image: linear-gradient(to bottom, #eee, #f9f9f9, #eee); ' ..  'padding: 0.1em 0.3em; ' ..  'font-family: inherit; ' ..  'font-size: 0.85em;">'  local kbdSuffix = '</kbd>'  local keyText = {  ['caps lock'] = '⇪ Caps Lock',  ['[[caps lock]]'] = '⇪ [[Caps Lock]]',  ['shift'] = '⇧ Shift',  ['[[shift key|shift]]'] = '⇧ [[Shift key|Shift]]',  ['enter'] = '↵ Enter',  ['[[enter key|enter]]'] = '↵ [[Enter key|Enter]]',  ['cmd'] = '⌘ Cmd',  ['[[command key|cmd]]'] = '⌘ [[Command key|Cmd]]',  ['command'] = '⌘ Command',  ['[[command key|command]]'] = '⌘ [[Command key|Command]]',  ['opt'] = '⌥ Opt',  ['[[option key|opt]]'] = '⌥ [[Option key|Opt]]',  ['option'] = '⌥ Option',  ['[[option key|option]]'] = '⌥ [[Option key|Option]]',  ['tab'] = 'Tab ↹',  ['[[tab key|tab]]'] = '[[Tab key|Tab]] ↹',  ['backspace'] = '← Backspace',  ['[[backspace]]'] = '← [[Backspace]]',  ['win'] = '⊞ Win',  ['[[windows key|win]]'] = '⊞ [[Windows key|Win]]',  ['menu'] = '≣ Menu',  ['[[menu key|menu]]'] = '≣ [[Menu key|Menu]]',  ['up'] = '↑',  ['[[arrow keys|up]]'] = '[[Arrow keys|↑]]',  ['down'] = '↓',  ['[[arrow keys|down]]'] = '[[Arrow keys|↓]]',  ['left'] = '←',  ['[[arrow keys|left]]'] = '[[Arrow keys|←]]',  ['right'] = '→',  ['[[arrow keys|right]]'] = '[[Arrow keys|→]]',  ['asterisk'] = '&#42;',  ['hash'] = '&#35;',  ['[[#]]'] = '[[Number sign|#]]',  ['colon'] = '&#58;',  ['[[:]]'] = '[[Colon (punctuation)|:]]',  ['pipe'] = '&#124;',  ['[[|]]'] = '[[Pipe symbol|&#124;]]',  ['semicolon'] = '&#59;',  ['[[;]]'] = '[[Semi-colon|&#59;]]',  ['equals'] = '&#61;',   -- Left & right analog sticks.  ['l up'] = 'L↑',  ['l down'] = 'L↓',  ['l left'] = 'L←',  ['l right'] = 'L→',  ['l ne'] = 'L↗',  ['l se'] = 'L↘',  ['l nw'] = 'L↖',  ['l sw'] = 'L↙',   ['r up'] = 'R↑',  ['r down'] = 'R↓',  ['r left'] = 'R←',  ['r right'] = 'R→',  ['r ne'] = 'R↗',  ['r se'] = 'R↘',  ['r nw'] = 'R↖',  ['r sw'] = 'R↙',   -- PlayStation.  ['ex'] = '×',  ['circle'] = '○',  ['square'] = '□',  ['triangle'] = '△',   -- Nintendo 64 and GameCube.  ['c up'] = 'C↑',  ['c down'] = 'C↓',  ['c left'] = 'C←',  ['c right'] = 'C→',  ['c ne'] = 'C↗',  ['c se'] = 'C↘',  ['c nw'] = 'C↖',  ['c sw'] = 'C↙', }  local keyAlias = {  -- ['alternate name for key (alias)'] = 'name for key used in key table'  ['[[cmd key|cmd]]'] = '[[command key|cmd]]',  ['[[cmd key|command]]'] = '[[command key|command]]',  ['[[opt key|opt]]'] = '[[option key|opt]]',  ['[[option key]]'] = '[[option key|option]]',  ['[[opt key|option]]'] = '[[option key|option]]',  ['[[win key|win]]'] = '[[windows key|win]]',  ['*'] = 'asterisk',  ['#'] = 'hash',  [':'] = 'colon',  [';'] = 'semicolon',  ['l-up'] = 'l up',  ['l-down'] = 'l down',  ['l-left'] = 'l left',  ['l-right'] = 'l right',  ['l-ne'] = 'l ne',  ['l-se'] = 'l se',  ['l-nw'] = 'l nw',  ['l-sw'] = 'l sw',  ['r-up'] = 'r up',  ['r-down'] = 'r down',  ['r-left'] = 'r left',  ['r-right'] = 'r right',  ['r-ne'] = 'r ne',  ['r-se'] = 'r se',  ['r-nw'] = 'r nw',  ['r-sw'] = 'r sw',  ['ps x'] = 'ex',  ['ps c'] = 'circle',  ['ps s'] = 'square',  ['ps t'] = 'triangle',  ['c-up'] = 'c up',  ['c-down'] = 'c down',  ['c-left'] = 'c left',  ['c-right'] = 'c right',  ['c-ne'] = 'c ne',  ['c-se'] = 'c se',  ['c-nw'] = 'c nw',  ['c-sw'] = 'c sw', }  local Collection = {} Collection.__index = Collection do  function Collection:add(item)  if item ~= nil then  self.n = self.n + 1  self[self.n] = item  end  end  function Collection:join(sep)  return table.concat(self, sep)  end  function Collection:sort(comp)  table.sort(self, comp)  end  function Collection.new()  return setmetatable({n = 0}, Collection)  end end  local function keyPress(args)  local chainNames = {  'chain first',  'chain second',  'chain third',  'chain fourth',  'chain fifth',  'chain sixth',  'chain seventh',  'chain eighth',  'chain ninth',  }  local result = Collection.new()  local chainDefault = args.chain or '+'  for i, id in ipairs(args) do  if i > 1 then  result:add(args[chainNames[i - 1]] or chainDefault)  end  local lc = id:lower()  local text = keyText[lc] or keyText[keyAlias[lc]] or id  result:add(kbdPrefix .. text .. kbdSuffix)  end  return result:join() end  local function keypress(frame)  -- Called by "{{key press|...}}".  -- Using the template doubles the post‐expand include size.  return keyPress(frame:getParent().args) end  local function press(frame)  -- Called by "{{#invoke:key|press|...}}".  return keyPress(frame.args) end  return {  keypress = keypress,  press = press, }