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-- This module provides a library for formatting imagefile wikilinks.
local libraryUtilyesno = require('libraryUtilModule:Yesno')
local checkType = require('libraryUtil').checkType
local imagep = {}
function imagep.new_main(filenameargs)
checkType('image.new_main', 1, filenameargs, 'stringtable', 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', true)
checkType('image:format', 2, format, 'string', true)
local validFormats = {
thumb = true,
thumbnail = true,
frame = true,
framed = true,
frameless = true
}
if s == nil or validFormats[s] then
data.theFormat = s
data.theFormatFilename = filename
else
error(string.format(
"badtype argumenterror #1 toin 'image:format' ('%s' isparameter notof a'_main' valid(expected formatstring, got %s)",
skey, type(val)
), 2level)
end
return self
end
local functionret 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 3)nil
end
function data:width(px)
checkSelf(self, 'image:width')
checkType('image:width', 1, px, 'number', true)
if px and data.isUpright then
sizeError('image:width')
end
checkArg(key, val, 4)
data.theWidth = px
ret[#ret + 1] = val
return self
end
-- Adds a named parameter to the buffer. We assume that the parameter name
function data:height(px)
-- is the same as the argument key.
checkSelf(self, 'image:height')
local function addNamed(key)
checkType('image:height', 1, px, 'number', true)
local val = args[key]
if px and data.isUpright then
if not val then
sizeError('image:height')
return nil
end
checkArg(key, val, 4)
data.theHeight = px
ret[#ret + 1] = key .. '=' .. val
return self
end
-- Filename
function data:upright(isUpright, factor)
checkArg('file', args.file, 3)
checkSelf(self, 'image:upright')
ret[#ret + 1] = 'File:' .. args.file
checkType('image:upright', 1, isUpright, 'boolean', true)
checkType('image:upright', 2, factor, 'number', true)
-- Format
if isUpright and (data.theWidth or data.theHeight) then
if args.format then
sizeError('image:upright')
checkArg('format', args.format)
end
if args.formatfile then
data.isUpright = isUpright
checkArg('formatfile', args.formatfile)
data.uprightFactor = factor
ret[#ret + 1] = args.format .. '=' .. args.formatfile
return self
end
function data:resetSize()
checkSelf(self, 'image:resetSize')
for i, field in ipairs{'theWidth', 'theHeight', 'isUpright', 'uprightFactor'} do
data[field] = nil
end
return self
end
function data:location(s)
checkSelf(self, 'image:location')
checkType('image:location', 1, s, 'string', true)
local validLocations = {
right = true,
left = true,
center = true,
none = true
}
if s == nil or validLocations[s] then
data.theLocation = s
else
error(stringret[#ret + 1] = args.format(
"bad argument #1 to 'image:location' ('%s' is not a valid location)",
s
), 2)
end
return self
end
-- Border
function data:alignment(s)
if yesno(args.border) then
checkSelf(self, 'image:alignment')
ret[#ret + 1] = 'border'
checkType('image:alignment', 1, s, 'string', true)
local validAlignments = {
baseline = true,
middle = true,
sub = true,
super = true,
['text-top'] = true,
['text-bottom'] = true,
top = true,
bottom = true
}
if s == nil or validAlignments[s] then
data.theAlignment = s
else
error(string.format(
"bad argument #1 to 'image:alignment' ('%s' is not a valid alignment)",
s
), 2)
end
return self
end
addPositional('location')
function data:border(hasBorder)
addPositional('alignment')
checkSelf(self, 'image:border')
addPositional('size')
checkType('image:border', 1, hasBorder, 'boolean', true)
addNamed('upright')
data.hasBorder = hasBorder
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
function data:link(s)
checkSelf(self, 'image:link')
checkType('image:link', 1, s, 'string', true)
data.theLink = s
return self
end
function data:alt(s)
checkSelf(self, 'image:alt')
checkType('image:alt', 1, s, 'string', true)
data.theAlt = s
return self
end
function data:page(num)
checkSelf(self, 'image:page')
checkType('image:page', 1, num, 'number', true)
data.thePage = s
return self
end
function data:class(s)
checkSelf(self, 'image:class')
checkType('image:class', 1, s, 'string', true)
data.theClass = s
return self
end
function data:lang(s)
checkSelf(self, 'image:lang')
checkType('image:lang', 1, s, 'string', true)
data.theLang = s
return self
end
function data:caption(s)
checkSelf(self, 'image:caption')
checkType('image:caption', 1, s, 'string', true)
data.theCaption = s
return self
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'
elseifif data.theWidthv and== data.theHeight'_BLANK' 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
args[k] = v
-- Render named parameters.
-- That includes link, alt, page, class, and lang.
do
local namedParameters = {'link', 'alt', 'page', 'class', 'lang'}
for i, parameter in ipairs(namedParameters) do
local dataField = 'the' .. parameter:sub(1, 1):upper() .. parameter:sub(2, -1)
local value = data[dataField]
if value then
ret[#ret + 1] = parameter .. '=' .. tostring(value)
end
end
end
-- Caption
ret[#ret + 1] = data.theCaption
return string.format('[[%s]]', table.concat(ret, '|'))
end
return p._main(args)
local privateFields = {
theName = true,
theFormat = true,
theFormatFilename = true,
theWidth = true,
theHeight = true,
isUpright = true,
uprightFactor = true,
theLocation = true,
theAlignment = true,
hasBorder = true,
theLink = true,
theAlt = true,
thePage = true,
theClass = true,
theLang = true,
theCaption = true
}
local readOnlyFields = {}
for field in pairs(data) do
readOnlyFields[field] = true
end
readOnlyFields.theName = nil -- This is set if a filename is given to image.new, so remove it.
local function restrictedFieldError(key, restriction)
error(string.format(
"image object field '%s' is %s",
tostring(key),
restriction
), 3)
end
setmetatable(obj, {
__index = function (t, key)
if privateFields[key] then
restrictedFieldError(key, 'private')
else
return data[key]
end
end,
__newindex = function (t, key, value)
if privateFields[key] then
restrictedFieldError(key, 'private')
elseif readOnlyFields[key] then
restrictedFieldError(key, 'read-only')
else
data[key] = value
end
end,
__tostring = function (t)
return t:render()
end,
__pairs = function ()
local temp = {}
for k, v in pairs(data) do
if not privateFields[k] then
temp[k] = v
end
end
return pairs(temp)
end
})
return obj
end
return imagep
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