Module:Location map

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```require('Module:No globals')

local p = {}
local dataset = 'Location map.tab'
local getArgs = require('Module:Arguments').getArgs

local function round(n, decimals)
local pow = 10^(decimals or 0)
return math.floor(n * pow + 0.5) / pow
end

function p.getMapParams(map, frame)
if not map then
error('The name of the location map definition to use must be specified', 2)
end
local moduletitle = mw.title.new('Module:Location map/data/' .. map)
if not moduletitle then
error(string.format('%q is not a valid name for a location map definition', map), 2)
elseif moduletitle.exists then
local mapData = mw.loadData('Module:Location map/data/' .. map)
return function(name, params)
if name == nil then
return 'Module:Location map/data/' .. map
elseif mapData[name] == nil then
return ''
elseif params then
return mw.message.newRawMessage(tostring(mapData[name]), unpack(params)):plain()
else
return mapData[name]
end
end
else
error('Unable to find the specified location map definition: "Module:Location map/data/' .. map .. '" does not exist', 2)
end
end

function p.data(frame, args, map)
if not args then
args = getArgs(frame, {frameOnly = true})
end
if not map then
map = p.getMapParams(args[1], frame)
end
local params = {}
for k,v in ipairs(args) do
if k > 2 then
params[k-2] = v
end
end
return map(args[2], #params ~= 0 and params)
end

local hemisphereMultipliers = {
longitude = { W = -1, w = -1, E = 1, e = 1 },
latitude = { S = -1, s = -1, N = 1, n = 1 }
}

local function decdeg(degrees, minutes, seconds, hemisphere, decimal, direction)
if decimal then
if degrees then
error('Decimal and DMS degrees cannot both be provided for ' .. direction, 2)
elseif minutes then
error('Minutes can only be provided with DMS degrees for ' .. direction, 2)
elseif seconds then
error('Seconds can only be provided with DMS degrees for ' .. direction, 2)
elseif hemisphere then
error('A hemisphere can only be provided with DMS degrees for ' .. direction, 2)
end
local retval = tonumber(decimal)
if retval then
return retval
end
error('The value "' .. decimal .. '" provided for ' .. direction .. ' is not valid', 2)
elseif seconds and not minutes then
error('Seconds were provided for ' .. direction .. ' without minutes also being provided', 2)
elseif not degrees then
if minutes then
error('Minutes were provided for ' .. direction .. ' without degrees also being provided', 2)
elseif hemisphere then
error('A hemisphere was provided for ' .. direction .. ' without degrees also being provided', 2)
end
return nil
end
decimal = tonumber(degrees)
if not decimal then
error('The degree value "' .. degrees .. '" provided for ' .. direction .. ' is not valid', 2)
elseif minutes and not tonumber(minutes) then
error('The minute value "' .. minutes .. '" provided for ' .. direction .. ' is not valid', 2)
elseif seconds and not tonumber(seconds) then
error('The second value "' .. seconds .. '" provided for ' .. direction .. ' is not valid', 2)
end
decimal = decimal + (minutes or 0)/60 + (seconds or 0)/3600
if hemisphere then
local multiplier = hemisphereMultipliers[direction][hemisphere]
if not multiplier then
error('The hemisphere "' .. hemisphere .. '" provided for ' .. direction .. ' is not valid', 2)
end
decimal = decimal * multiplier
end
return decimal
end

-- Finds a parameter in a transclusion of {{Coord}}.
local function coord2text(para,coord) -- this should be changed for languages which do not use Arabic numerals or the degree sign
local result = mw.text.split(mw.ustring.match(coord,'%-?[%.%d]+°[NS] %-?[%.%d]+°[EW]') or '', '[ °]')
if para == 'longitude' then result = {result[3], result[4]} end
if not tonumber(result[1]) or not result[2] then return error('Malformed coordinates value', 2) end
end

-- effectively make removeBlanks false for caption and maplink, and true for everything else
-- if useWikidata is present but blank, convert it to false instead of nil
-- p.top, p.bottom, and their callers need to use this
function p.valueFunc(key, value)
if value then
value = mw.text.trim(value)
end
if value ~= '' or key == 'caption' or key == 'maplink' then
return value
elseif key == 'useWikidata' then
return false
end
end

local function getContainerImage(args, map)
if args.AlternativeMap then
return args.AlternativeMap
elseif args.relief and map('image1') ~= '' then
return map('image1')
else
return map('image')
end
end

function p.top(frame, args, map)
if not args then
args = getArgs(frame, {frameOnly = true, valueFunc = p.valueFunc})
end
if not map then
map = p.getMapParams(args[1], frame)
end
local width
local default_as_number = tonumber(mw.ustring.match(tostring(args.default_width),"%d*"))
if not args.width then
width = round((default_as_number or 240) * (tonumber(map('defaultscale')) or 1))
elseif mw.ustring.sub(args.width, -2) == 'px' then
width = mw.ustring.sub(args.width, 1, -3)
else
width = args.width
end
local width_as_number = tonumber(mw.ustring.match(tostring(width),"%d*")) or 0;
if width_as_number == 0 then
-- check to see if width is junk. If it is, then use default calculation
width = round((default_as_number or 240) * (tonumber(map('defaultscale')) or 1))
width_as_number = tonumber(mw.ustring.match(tostring(width),"%d*")) or 0;
end
if args.max_width ~= "" and args.max_width ~= nil then
-- check to see if width bigger than max_width
local max_as_number = tonumber(mw.ustring.match(args.max_width,"%d*")) or 0;
if width_as_number>max_as_number and max_as_number>0 then
width = args.max_width;
end
end
local retval = args.float == 'center' and '<div class="center">' or ''
if args.caption and args.caption ~= '' and args.border ~= 'infobox' then
retval = retval .. '<div class="noviewer thumb '
if args.float == '"left"' or args.float == 'left' then
retval = retval .. 'tleft'
elseif args.float == '"center"' or args.float == 'center' or args.float == '"none"' or args.float == 'none' then
retval = retval .. 'tnone'
else
retval = retval .. 'tright'
end
retval = retval .. '"><div class="thumbinner" style="width:' .. (width + 2) .. 'px'
if args.border == 'none' then
retval = retval .. ';border:none'
elseif args.border then
retval = retval .. ';border-color:' .. args.border
end
retval = retval .. '"><div style="position:relative;width:' .. width .. 'px' .. (args.border ~= 'none' and ';border:1px solid lightgray">' or '">')
else
retval = retval .. '<div style="width:' .. width .. 'px;'
if args.float == '"left"' or args.float == 'left' then
retval = retval .. 'float:left;clear:left'
elseif args.float == '"center"' or args.float == 'center' then
retval = retval .. 'float:none;clear:both;margin-left:auto;margin-right:auto'
elseif args.float == '"none"' or args.float == 'none' then
retval = retval .. 'float:none;clear:none'
else
retval = retval .. 'float:right;clear:right'
end
retval = retval .. '"><div style="width:' .. width .. 'px;padding:0"><div style="position:relative;width:' .. width .. 'px">'
end
local image = getContainerImage(args, map)
local currentTitle = mw.title.getCurrentTitle()
retval = string.format(
'%s[[File:%s|%spx|%s%s]]',
retval,
image,
width,
args.alt or ((args.label or currentTitle.text) .. ' is located in ' .. map('name')),
)
if args.caption and args.caption ~= '' then
if (currentTitle.namespace == 0) and mw.ustring.find(args.caption, '##') then
retval = retval .. '[[Category:Pages using location map with a double number sign in the caption]]'
end
end
if args.overlay_image then
return retval .. '<div style="position:absolute;top:0;left:0">[[File:' .. args.overlay_image .. '|' .. width .. 'px]]</div>'
else
return retval
end
end

function p.bottom(frame, args, map)
if not args then
args = getArgs(frame, {frameOnly = true, valueFunc = p.valueFunc})
end
if not map then
map = p.getMapParams(args[1], frame)
end
local retval = '</div>'
local currentTitle = mw.title.getCurrentTitle()
if not args.caption or args.border == 'infobox' then
if args.border then
retval = retval .. '<div>'
else
retval = retval .. '<div style="font-size:90%;padding-top:3px">'
end
retval = retval
.. (args.caption or (args.label or currentTitle.text) .. ' (' .. map('name') .. ')')
.. '</div>'
elseif args.caption ~= ''  then
-- This is not the pipe trick. We're creating a link with no text on purpose, so that CSS can give us a nice image
retval = retval .. '<div class="thumbcaption"><div class="magnify">[[:File:' .. getContainerImage(args, map) .. '| ]]</div>' .. args.caption .. '</div>'
end

if args.switcherLabel then
retval = retval .. '<span class="switcher-label" style="display:none">' .. args.switcherLabel .. '</span>'
elseif args.autoSwitcherLabel then
retval = retval .. '<span class="switcher-label" style="display:none">Show map of ' .. map('name') .. '</span>'
end

retval = retval .. '</div></div>'
if args.caption_undefined then
mw.log('Removed parameter caption_undefined used.')
local parent = frame:getParent()
if parent then
mw.log('Parent is ' .. parent:getTitle())
end
mw.logObject(args, 'args')
if currentTitle.namespace == 0 then
retval = retval .. '[[Category:Location maps with removed parameters|caption_undefined]]'
end
end
if map('skew') ~= '' or map('lat_skew') ~= '' or map('crosses180') ~= '' or map('type') ~= '' then
mw.log('Removed parameter used in map definition ' .. map())
if currentTitle.namespace == 0 then
local key = (map('skew') ~= '' and 'skew' or '') ..
(map('lat_skew') ~= '' and 'lat_skew' or '') ..
(map('crosses180') ~= '' and 'crosses180' or '') ..
(map('type') ~= '' and 'type' or '')
retval = retval .. '[[Category:Location maps with removed parameters|' .. key .. ' ]]'
end
end
if string.find(map('name'), '|', 1, true) then
mw.log('Pipe used in name of map definition ' .. map())
if currentTitle.namespace == 0 then
retval = retval .. '[[Category:Location maps with a name containing a pipe]]'
end
end
if args.float == 'center' then
retval = retval .. '</div>'
end
return retval
end

local function markOuterDiv(x, y, imageDiv, labelDiv)
return mw.html.create('div')
:cssText('position:absolute;top:' .. round(y, 3) .. '%;left:' .. round(x, 3) .. '%')
:node(imageDiv)
:node(labelDiv)
end

local function markImageDiv(mark, marksize, label, link, alt, title)
local builder = mw.html.create('div')
:cssText('position:absolute;left:-' .. round(marksize / 2) .. 'px;top:-' .. round(marksize / 2) .. 'px;line-height:0')
:attr('title', title)
if marksize ~= 0 then
builder:wikitext(string.format(
mark,
marksize,
marksize,
label,
alt and ('|alt=' .. alt) or ''
))
end
return builder
end

local function markLabelDiv(label, label_size, label_width, position, background, x, marksize)
if tonumber(label_size) == 0 then
return mw.html.create('div'):cssText('font-size:0%;position:absolute'):wikitext(label)
end
local builder = mw.html.create('div')
:cssText('font-size:' .. label_size .. '%;line-height:110%;position:absolute;width:' .. label_width .. 'em')
local distance = round(marksize / 2 + 1)
local spanCss
if position == 'top' then -- specified top
builder:cssText('bottom:' .. distance .. 'px;left:' .. (-label_width / 2) .. 'em;text-align:center')
elseif position == 'bottom' then -- specified bottom
builder:cssText('top:' .. distance .. 'px;left:' .. (-label_width / 2) .. 'em;text-align:center')
elseif position == 'left' or (tonumber(x) > 70 and position ~= 'right') then -- specified left or autodetected to left
builder:cssText('top:-0.75em;right:' .. distance .. 'px;text-align:right')
spanCss = 'float:right'
else -- specified right or autodetected to right
builder:cssText('top:-0.75em;left:' .. distance .. 'px;text-align:left')
spanCss = 'float:left'
end
builder = builder:tag('div')
:css('display', 'inline')
:cssText(spanCss)
:wikitext(label)
if background then
builder:cssText('background-color:' .. background)
end
return builder:done()
end

local function getX(longitude, left, right)
local width = (right - left) % 360
if width == 0 then
width = 360
end
local distanceFromLeft = (longitude - left) % 360
-- the distance needed past the map to the right equals distanceFromLeft - width. the distance needed past the map to the left equals 360 - distanceFromLeft. to minimize page stretching, go whichever way is shorter
if distanceFromLeft - width / 2 >= 180 then
distanceFromLeft = distanceFromLeft - 360
end
return 100 * distanceFromLeft / width
end

local function getY(latitude, top, bottom)
return 100 * (top - latitude) / (top - bottom)
end

function p.mark(frame, args, map)
if not args then
args = getArgs(frame, {wrappers = 'Template:Location map~'})
end
local mapnames = {}
if not map then
if args[1] then
map = {}
for mapname in mw.text.gsplit(args[1], '#', true) do
map[#map + 1] = p.getMapParams(mw.ustring.gsub(mapname, '^%s*(.-)%s*\$', '%1'), frame)
mapnames[#mapnames + 1] = mapname
end
if #map == 1 then map = map[1] end
else
map = p.getMapParams('World', frame)
args[1] = 'World'
end
end
if type(map) == 'table' then
local outputs = {}
local oldargs = args[1]
for k,v in ipairs(map) do
args[1] = mapnames[k]
outputs[k] = tostring(p.mark(frame, args, v))
end
args[1] = oldargs
return table.concat(outputs, '#PlaceList#') .. '#PlaceList#'
end
local x, y, longitude, latitude
longitude = decdeg(args.lon_deg, args.lon_min, args.lon_sec, args.lon_dir, args.long, 'longitude')
latitude = decdeg(args.lat_deg, args.lat_min, args.lat_sec, args.lat_dir, args.lat, 'latitude')
if args.excludefrom then
-- If this mark is to be excluded from certain maps entirely (useful in the context of multiple maps)
for exclusionmap in mw.text.gsplit(args.excludefrom, '#', true) do
-- Check if this map is excluded. If so, return an empty string.
if args[1] == exclusionmap then
return ''
end
end

end
local builder = mw.html.create()
local currentTitle = mw.title.getCurrentTitle()
if args.coordinates then
--		Temporarily removed to facilitate infobox conversion. See [[Wikipedia:Coordinates in infoboxes]]

--		if longitude or latitude then
--			error('Coordinates from [[Module:Coordinates]] and individual coordinates cannot both be provided')
--		end
longitude = coord2text('longitude', args.coordinates)
latitude = coord2text('latitude', args.coordinates)
elseif not longitude and not latitude and args.useWikidata then
-- If they didn't provide either coordinate, try Wikidata. If they provided one but not the other, don't.
local entity = mw.wikibase.getEntity()
if entity and entity.claims and entity.claims.P625 and entity.claims.P625[1].mainsnak.snaktype == 'value' then
local value = entity.claims.P625[1].mainsnak.datavalue.value
longitude, latitude = value.longitude, value.latitude
end
if args.link and (currentTitle.namespace == 0) then
builder:wikitext('[[Category:Location maps with linked markers with coordinates from Wikidata]]')
end
end
if not longitude then
error('No value was provided for longitude')
elseif not latitude then
error('No value was provided for latitude')
end
if currentTitle.namespace > 0 then
if (not args.lon_deg) ~= (not args.lat_deg) then
builder:wikitext('[[Category:Location maps with different longitude and latitude precisions|Degrees]]')
elseif (not args.lon_min) ~= (not args.lat_min) then
builder:wikitext('[[Category:Location maps with different longitude and latitude precisions|Minutes]]')
elseif (not args.lon_sec) ~= (not args.lat_sec) then
builder:wikitext('[[Category:Location maps with different longitude and latitude precisions|Seconds]]')
elseif (not args.lon_dir) ~= (not args.lat_dir) then
builder:wikitext('[[Category:Location maps with different longitude and latitude precisions|Hemisphere]]')
elseif (not args.long) ~= (not args.lat) then
builder:wikitext('[[Category:Location maps with different longitude and latitude precisions|Decimal]]')
end
end
if args.skew or args.lon_shift or args.markhigh then
mw.log('Removed parameter used in invocation.')
local parent = frame:getParent()
if parent then
mw.log('Parent is ' .. parent:getTitle())
end
mw.logObject(args, 'args')
if currentTitle.namespace == 0 then
local key = (args.skew and 'skew' or '') ..
(args.lon_shift and 'lon_shift' or '') ..
(args.markhigh and 'markhigh' or '')
builder:wikitext('[[Category:Location maps with removed parameters|' .. key ..' ]]')
end
end
if map('x') ~= '' then
x = tonumber(mw.ext.ParserFunctions.expr(map('x', { latitude, longitude })))
else
x = tonumber(getX(longitude, map('left'), map('right')))
end
if map('y') ~= '' then
y = tonumber(mw.ext.ParserFunctions.expr(map('y', { latitude, longitude })))
else
y = tonumber(getY(latitude, map('top'), map('bottom')))
end
if (x < 0 or x > 100 or y < 0 or y > 100) and not args.outside then
mw.log('Mark placed outside map boundaries without outside flag set. x = ' .. x .. ', y = ' .. y)
local parent = frame:getParent()
if parent then
mw.log('Parent is ' .. parent:getTitle())
end
mw.logObject(args, 'args')
if currentTitle.namespace == 0 then
local key = frame:preprocess('{{FULLPAGENAME}}')
builder:wikitext('[[Category:Location maps with marks outside map and outside parameter not set|' .. key .. ' ]]')
end
end
local mark = args.mark or map('mark')
if mark == '' then
mark = 'Red pog.svg'
end
local marksize = tonumber(args.marksize) or tonumber(map('marksize')) or 8
local imageDiv = markImageDiv(mark, marksize, args.label or mw.title.getCurrentTitle().text, args.link or '', args.alt, args[2])
local labelDiv
if args.label and args.position ~= 'none' then
labelDiv = markLabelDiv(args.label, args.label_size or 90, args.label_width or 6, args.position, args.background, x, marksize)
end
return builder:node(markOuterDiv(x, y, imageDiv, labelDiv))
end

local function switcherSeparate(s)
if s == nil then return {} end
local retval = {}
for i in string.gmatch(s .. '#', '([^#]*)#') do
i = mw.text.trim(i)
retval[#retval + 1] = (i ~= '' and i)
end
return retval
end

function p.main(frame, args, map)
local caption_list = {}
if not args then
args = getArgs(frame, {wrappers = 'Template:Location map', valueFunc = p.valueFunc})
end
if args.useWikidata == nil then
args.useWikidata = true
end
if not map then
if args[1] then
map = {}
for mapname in string.gmatch(args[1], '[^#]+') do
map[#map + 1] = p.getMapParams(mw.ustring.gsub(mapname, '^%s*(.-)%s*\$', '%1'), frame)
end
if args['caption'] then
if args['caption'] == "" then
while #caption_list < #map do
caption_list[#caption_list + 1] = args['caption']
end
else
for caption in mw.text.gsplit(args['caption'], '##', true) do
caption_list[#caption_list + 1] = caption
end
end
end
if #map == 1 then map = map[1] end
else
map = p.getMapParams('World', frame)
end
end
if type(map) == 'table' then
local altmaps = switcherSeparate(args.AlternativeMap)
if #altmaps > #map then
error(string.format('%d AlternativeMaps were provided, but only %d maps were provided', #altmaps, #map))
end
local overlays = switcherSeparate(args.overlay_image)
if #overlays > #map then
error(string.format('%d overlay_images were provided, but only %d maps were provided', #overlays, #map))
end
if #caption_list > #map then
error(string.format('%d captions were provided, but only %d maps were provided', #caption_list, #map))
end
local outputs = {}
args.autoSwitcherLabel = true
for k,v in ipairs(map) do
args.AlternativeMap = altmaps[k]
args.overlay_image = overlays[k]
args.caption = caption_list[k]
outputs[k] = p.main(frame, args, v)
end
return '<div class="switcher-container">' .. table.concat(outputs) .. '</div>'
else
return p.top(frame, args, map) .. tostring( p.mark(frame, args, map) ) .. p.bottom(frame, args, map)
end
end

return p
```