-- This module implements {{key press}}.



local kbdPrefix = '<kbd class="keyboard-key nowrap">'



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

			selfself.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(argschainNamesi - 1]] or chainDefault)

		end

		local lc = id:lower()

		local text = keyTextlc or keyTextkeyAliaslc]] or id

		result:add(kbdPrefix .. text .. kbdSuffix)

	end

	return mw.getCurrentFrame():extensionTag{

		name = 'templatestyles', args = { src = 'Template:Key press/styles.css'} 

	} .. 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,

}