Editing Module:File link

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-- This module provides a library for formatting file wikilinks.
+
-- This module provides a library for formatting image wikilinks.
  
−
local yesno = require('Module:Yesno')
+
local libraryUtil = require('libraryUtil')
−
local checkType = require('libraryUtil').checkType
+
local checkType = libraryUtil.checkType
  
−
local p = {}
+
local image = {}
  
−
function p._main(args)
+
function image.new(filename)
−
checkType('_main', 1, args, 'table')
+
checkType('image.new', 1, filename, 'string', true)
−
 
+
local obj, data = {}, {}
−
-- This is basically libraryUtil.checkTypeForNamedArg, but we are rolling our
+
−
-- own function to get the right error level.
+
local checkSelf = libraryUtil.makeCheckSelfFunction(
−
local function checkArg(key, val, level)
+
'image',
−
if type(val) ~= 'string' then
+
'image',
 +
obj,
 +
'image object'
 +
)
 +
 +
-- Set the filename if we were passed it as an input to image.new.
 +
if filename then
 +
data.theName = filename
 +
end
 +
 +
function data:name(s)
 +
checkSelf(self, 'image:name')
 +
checkType('image:name', 1, s, 'string')
 +
data.theName = s
 +
return self
 +
end
 +
 +
function data:format(s, filename)
 +
checkSelf(self, 'image:format')
 +
checkType('image:format', 1, s, 'string')
 +
checkType('image:format', 2, format, 'string', true)
 +
local validFormats = {
 +
thumb = true,
 +
thumbnail = true,
 +
frame = true,
 +
framed = true,
 +
frameless = true
 +
}
 +
if validFormats[s] then
 +
data.theFormat = s
 +
data.theFormatFilename = filename
 +
else
 
error(string.format(
 
error(string.format(
−
"type error in '%s' parameter of '_main' (expected string, got %s)",
+
"bad argument #1 to 'image:format' ('%s' is not a valid format)",
−
key, type(val)
+
s
−
), level)
+
), 2)
 
end
 
end
 +
return self
 
end
 
end
  
−
local ret = {}
+
local function sizeError(methodName)
−
 
+
-- Used for formatting duplication errors in size-related methods.
−
-- Adds a positional parameter to the buffer.
+
error(string.format(
−
local function addPositional(key)
+
"duplicate size argument detected in '%s'"
−
local val = args[key]
+
.. " ('upright' cannot be used in conjunction with height or width)",
−
if not val then
+
methodName
−
return nil
+
), 3)
 +
end
 +
 +
function data:width(px)
 +
checkSelf(self, 'image:width')
 +
checkType('image:width', 1, px, 'number')
 +
if data.isUpright then
 +
sizeError('image:width')
 +
end
 +
data.theWidth = px
 +
return self
 +
end
 +
 +
function data:height(px)
 +
checkSelf(self, 'image:height')
 +
checkType('image:height', 1, px, 'number')
 +
if data.isUpright then
 +
sizeError('image:height')
 +
end
 +
data.theHeight = px
 +
return self
 +
end
 +
 +
function data:upright(factor)
 +
checkSelf(self, 'image:upright')
 +
checkType('image:upright', 1, factor, 'number', true)
 +
if data.theWidth or data.theHeight then
 +
sizeError('image:upright')
 +
end
 +
data.isUpright = true
 +
data.uprightFactor = factor
 +
return self
 +
end
 +
 +
function data:resetSize()
 +
checkSelf(self, 'image:resetSize')
 +
for i, field in ipairs{'theWidth', 'theHeight', 'isUpright', 'uprightFactor'} do
 +
data[field] = nil
 
end
 
end
−
checkArg(key, val, 4)
+
return self
−
ret[#ret + 1] = val
 
 
end
 
end
−
 
+
−
-- Adds a named parameter to the buffer. We assume that the parameter name
+
function data:location(s)
−
-- is the same as the argument key.
+
checkSelf(self, 'image:location')
−
local function addNamed(key)
+
checkType('image:location', 1, s, 'string')
−
local val = args[key]
+
local validLocations = {
−
if not val then
+
right = true,
−
return nil
+
left = true,
 +
center = true,
 +
none = true
 +
}
 +
if validLocations[s] then
 +
data.theLocation = s
 +
else
 +
error(string.format(
 +
"bad argument #1 to 'image:location' ('%s' is not a valid location)",
 +
s
 +
), 2)
 
end
 
end
−
checkArg(key, val, 4)
+
return self
−
ret[#ret + 1] = key .. '=' .. val
 
 
end
 
end
−
 
+
−
-- Filename
+
function data:alignment(s)
−
checkArg('file', args.file, 3)
+
checkSelf(self, 'image:alignment')
−
ret[#ret + 1] = 'File:' .. args.file
+
checkType('image:alignment', 1, s, 'string')
−
 
+
local validAlignments = {
−
-- Format
+
baseline = true,
−
if args.format then
+
middle = true,
−
checkArg('format', args.format)
+
sub = true,
−
if args.formatfile then
+
super = true,
−
checkArg('formatfile', args.formatfile)
+
['text-top'] = true,
−
ret[#ret + 1] = args.format .. '=' .. args.formatfile
+
['text-bottom'] = true,
 +
top = true,
 +
bottom = true
 +
}
 +
if validAlignments[s] then
 +
data.theAlignment = s
 
else
 
else
−
ret[#ret + 1] = args.format
+
error(string.format(
 +
"bad argument #1 to 'image:alignment' ('%s' is not a valid alignment)",
 +
s
 +
), 2)
 
end
 
end
 +
return self
 
end
 
end
−
 
+
−
-- Border
+
function data:border()
−
if yesno(args.border) then
+
checkSelf(self, 'image:border')
−
ret[#ret + 1] = 'border'
+
data.hasBorder = true
 +
return self
 +
end
 +
 +
function data:link(s)
 +
checkSelf(self, 'image:link')
 +
checkType('image:link', 1, s, 'string')
 +
data.theLink = s
 +
return self
 +
end
 +
 +
function data:alt(s)
 +
checkSelf(self, 'image:alt')
 +
checkType('image:alt', 1, s, 'string')
 +
data.theAlt = s
 +
return self
 
end
 
end
−
 
+
−
addPositional('location')
+
function data:caption(s)
−
addPositional('alignment')
+
checkSelf(self, 'image:caption')
−
addPositional('size')
+
checkType('image:caption', 1, s, 'string')
−
addNamed('upright')
+
data.theCaption = s
−
addNamed('link')
+
return self
−
addNamed('alt')
 
−
addNamed('page')
 
−
addNamed('class')
 
−
addNamed('lang')
 
−
addNamed('start')
 
−
addNamed('end')
 
−
addNamed('thumbtime')
 
−
addPositional('caption')
 
−
 
 
−
return string.format('[[%s]]', table.concat(ret, '|'))
 
−
end
 
−
 
 
−
function p.main(frame)
 
−
local origArgs = require('Module:Arguments').getArgs(frame, {
 
−
wrappers = 'Template:File link'
 
−
})
 
−
if not origArgs.file then
 
−
error("'file' parameter missing from [[Template:File link]]", 0)
 
 
end
 
end
 +
 +
function data:render()
 +
checkSelf(self, 'image:render')
 +
local ret = {}
 +
 +
-- Image name.
 +
if not data.theName then
 +
error('image:render: no image name was found')
 +
end
 +
ret[#ret + 1] = 'File:' .. data.theName
 +
 +
-- Image format
 +
if data.theFormat and data.theFormatFilename then
 +
ret[#ret + 1] = data.theFormat .. '=' .. data.theFormatFilename
 +
elseif data.theFormat then
 +
ret[#ret + 1] = data.theFormat
 +
end
 +
 +
-- Border
 +
if data.hasBorder then
 +
ret[#ret + 1] = 'border'
 +
end
 +
 +
-- Location
 +
ret[#ret + 1] = data.theLocation
  
−
-- Copy the arguments that were passed to a new table to avoid looking up
+
-- Alignment
−
-- every possible parameter in the frame object.
+
ret[#ret + 1] = data.theAlignment
−
local args = {}
+
−
for k, v in pairs(origArgs) do
+
-- Size
−
-- Make _BLANK a special argument to add a blank parameter. For use in
+
if data.isUpright and data.uprightFactor then
−
-- conditional templates etc. it is useful for blank arguments to be
+
ret[#ret + 1] = 'upright=' .. tostring(data.uprightFactor)
−
-- ignored, but we still need a way to specify them so that we can do
+
elseif data.isUpright then
−
-- things like [[File:Example.png|link=]].
+
ret[#ret + 1] = 'upright'
−
if v == '_BLANK' then
+
elseif data.theWidth and data.theHeight then
−
v = ''
+
ret[#ret + 1] = string.format('%dx%dpx', data.theWidth, data.theHeight)
 +
elseif data.theWidth then
 +
ret[#ret + 1] = tostring(data.theWidth) .. 'px'
 +
elseif data.theHeight then
 +
ret[#ret + 1] = string.format('x%dpx', data.theHeight)
 +
end
 +
 +
-- Link
 +
if data.theLink then
 +
ret[#ret + 1] = 'link=' .. data.theLink
 +
end
 +
 +
-- Alt
 +
if data.theAlt then
 +
ret[#ret + 1] = 'alt=' .. data.theAlt
 
end
 
end
−
args[k] = v
+
 +
-- Caption
 +
ret[#ret + 1] = data.theCaption
 +
 +
return string.format('[[%s]]', table.concat(ret, '|'))
 +
end
 +
 +
local readOnlyFields = {
 +
theName = true,
 +
theFormat = true,
 +
theFormatFilename = true,
 +
theWidth = true,
 +
theHeight = true,
 +
isUpright = true,
 +
uprightFactor = true,
 +
theLocation = true,
 +
theAlignment = true,
 +
hasBorder = true,
 +
theLink = true,
 +
theAlt = true,
 +
theCaption = true
 +
}
 +
for field in pairs(data) do
 +
readOnlyFields[field] = true
 
end
 
end
−
return p._main(args)
+
 +
setmetatable(obj, {
 +
__index = data,
 +
__newindex = function (t, key, value)
 +
if readOnlyFields[key] then
 +
error(string.format(
 +
"field '%s' is read-only",
 +
tostring(key)
 +
), 2)
 +
else
 +
data[key] = value
 +
end
 +
end,
 +
__tostring = function (t)
 +
return t:render()
 +
end
 +
})
 +
 +
return obj
 
end
 
end
  
−
return p
+
return image

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