Difference between revisions of "Module:Arguments"

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Module:Arguments (view source)

Revision as of 14:24, 6 June 2014

1,400 bytes added ,  9 years ago
add a "wrappers" option and fix bug when frame:getParent() returns nil, per protected edit request by User:Jackmcbarn
en>Mr. Stradivarius
(add a "wrappers" option and fix bug when frame:getParent() returns nil, per protected edit request by User:Jackmcbarn)
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-- #invoke. It is intended for use by other Lua modules, and should not be
-- #invoke. It is intended for use by other Lua modules, and should not be
-- called from #invoke directly.
-- called from #invoke directly.
 
local libraryUtil = require('libraryUtil')
local libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType
local checkType = libraryUtil.checkType
 
local arguments = {}
local arguments = {}
 
-- Generate four different tidyVal functions, so that we don't have to check the
-- Generate four different tidyVal functions, so that we don't have to check the
-- options every time we call it.
-- options every time we call it.
 
local function tidyValDefault(key, val)
local function tidyValDefault(key, val)
if type(val) == 'string' then
if type(val) == 'string' then
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end
end
end
end
 
local function tidyValTrimOnly(key, val)
local function tidyValTrimOnly(key, val)
if type(val) == 'string' then
if type(val) == 'string' then
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end
end
end
end
 
local function tidyValRemoveBlanksOnly(key, val)
local function tidyValRemoveBlanksOnly(key, val)
if type(val) == 'string' then
if type(val) == 'string' then
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end
end
end
end
 
local function tidyValNoChange(key, val)
local function tidyValNoChange(key, val)
return val
return val
end
end
 
function arguments.getArgs(frame, options)
function arguments.getArgs(frame, options)
checkType('getArgs', 1, frame, 'table', true)
checkType('getArgs', 1, frame, 'table', true)
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frame = frame or {}
frame = frame or {}
options = options or {}
options = options or {}
 
--[[
--[[
-- Get the arguments from the frame object if available. If the frame object
-- Get the argument tables. If we were passed a valid frame object, get the
-- is not available, we are being called from another Lua module or from the
-- frame arguments (fargs) and the parent frame arguments (pargs), depending
-- debug console, so assign the args to a new variable so we can
-- on the options set and on the parent frame's availability. If we weren't
-- differentiate them.
-- passed a valid frame object, we are being called from another Lua module
-- or from the debug console, so assume that we were passed a table of args
-- directly, and assign it to a new variable (luaArgs).
--]]
--]]
local fargs, pargs, luaArgs
local fargs, pargs, luaArgs
if type(frame.args) == 'table' and type(frame.getParent) == 'function' then
if type(frame.args) == 'table' and type(frame.getParent) == 'function' then
if not options.parentOnly then
if options.wrappers then
fargs = frame.args
--[[
end
-- The wrappers option makes Module:Arguments look up arguments in
if not options.frameOnly then
-- either the frame argument table or the parent argument table, but
pargs = frame:getParent().args
-- not both. This means that users can use either the #invoke syntax
end
-- or a wrapper template without the loss of performance associated
if options.parentFirst then
-- with looking arguments up in both the frame and the parent frame.
fargs, pargs = pargs, fargs
-- Module:Arguments will look up arguments in the parent frame
-- if it finds the parent frame's title in options.wrapper;
-- otherwise it will look up arguments in the frame object passed
-- to getArgs.
--]]
local parent = frame:getParent()
if not parent then
fargs = frame.args
else
local title = parent:getTitle():gsub('/sandbox$', '')
local found = false
if type(options.wrappers) == 'table' then
for _,v in pairs(options.wrappers) do
if v == title then
found = true
break
end
end
elseif options.wrappers == title then
found = true
end
if found then
pargs = parent.args
else
fargs = frame.args
end
end
else
-- options.wrapper isn't set, so check the other options.
if not options.parentOnly then
fargs = frame.args
end
if not options.frameOnly then
local parent = frame:getParent()
pargs = parent and parent.args or nil
end
if options.parentFirst then
fargs, pargs = pargs, fargs
end
end
end
else
else
luaArgs = frame
luaArgs = frame
end
end
-- Set the order of precedence of the argument tables. If the variables are
-- Set the order of precedence of the argument tables. If the variables are
-- nil, nothing will be added to the table, which is how we avoid clashes
-- nil, nothing will be added to the table, which is how we avoid clashes
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argTables[#argTables + 1] = pargs
argTables[#argTables + 1] = pargs
argTables[#argTables + 1] = luaArgs
argTables[#argTables + 1] = luaArgs
 
--[[
--[[
-- Generate the tidyVal function. If it has been specified by the user, we
-- Generate the tidyVal function. If it has been specified by the user, we
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end
end
end
end
 
--[[
--[[
-- Set up the args, metaArgs and nilArgs tables. args will be the one
-- Set up the args, metaArgs and nilArgs tables. args will be the one
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local args, metaArgs, nilArgs, metatable = {}, {}, {}, {}
local args, metaArgs, nilArgs, metatable = {}, {}, {}, {}
setmetatable(args, metatable)
setmetatable(args, metatable)
 
local function mergeArgs(iterator, tables)
local function mergeArgs(iterator, tables)
--[[
--[[
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end
end
end
end
 
--[[
--[[
-- Define metatable behaviour. Arguments are memoized in the metaArgs table,
-- Define metatable behaviour. Arguments are memoized in the metaArgs table,
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-- the arguments will already have been copied over.
-- the arguments will already have been copied over.
--]]
--]]
 
metatable.__index = function (t, key)
metatable.__index = function (t, key)
--[[
--[[
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return nil
return nil
end
end
 
metatable.__newindex = function (t, key, val)
metatable.__newindex = function (t, key, val)
-- This function is called when a module tries to add a new value to the
-- This function is called when a module tries to add a new value to the
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--]]
--]]
metaArgs[key] = nil
metaArgs[key] = nil
nilArgs[key] = true -- Memoize nils.
nilArgs[key] = true
else
else
metaArgs[key] = val
metaArgs[key] = val
end
end
end
end
 
metatable.__pairs = function ()
metatable.__pairs = function ()
-- Called when pairs is run on the args table.
-- Called when pairs is run on the args table.
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return pairs(metaArgs)
return pairs(metaArgs)
end
end
 
metatable.__ipairs = function ()
metatable.__ipairs = function ()
-- Called when ipairs is run on the args table.
-- Called when ipairs is run on the args table.
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return ipairs(metaArgs)
return ipairs(metaArgs)
end
end
 
return args
return args
end
end
 
return arguments
return arguments
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