Модул:Convert/show
This module can be used to prepare tables of wikitext to display simple documentation for specified units. Data is obtained by calling Module:Convert. In addition, the module can be used to show {{convert}} usage examples.
Displaying unit information уреди
The module contains a built-in list of commonly used units. The information at Help:Convert units#Units is the output from:
{{#invoke:convert/show|units}}
When no units are specified, the full built-in list of unit codes is used. In addition, the headings and examples defined in the module are displayed.
Units may be specified by entering section names or individual unit codes. No headings or examples are included if units are specified.
For example, one or more sections from the full list can be displayed as in the following examples:
{{#invoke:convert/show|units|length}}{{#invoke:convert/show|units|length|mass|area}}
Any "input" unit codes can be specified individually, for example, the following line:
{{#invoke:convert/show|units|um|cm|ug|kg}}
gives the result:
| Unit code | Unit symbol | Unit name | US name, if different |
|---|---|---|---|
| um | µm | micrometre | micrometer |
| cm | cm | centimetre | centimeter |
| ug | µg | microgram | |
| kg | kg | kilogram |
Only units suitable for use as a conversion input can be used. For example, ftin cannot be used as it is an output unit which displays the result in feet and inches.
Displaying usage examples уреди
The module can display examples of {{convert}} usage in a list or a table. The required parameters must be separated with ! (exclamation mark) rather than the normal | (pipe), and a parameter that includes an equals sign must be prefixed with 1= (for the first parameter), or 2= (for the second), etc.
For example, the following line:
{{#invoke:convert/show|list|1=123!cm!in!abbr=on|2=125!sqft!m2!abbr=off!sp=us}}
gives the result:
{{convert|123|cm|in|abbr=on}}→ 123 cm (48 in){{convert|125|sqft|m2|abbr=off|sp=us}}→ 125 square feet (11,6 square meters)
The same information can be displayed in a table.
{{#invoke:convert/show|table|1=123!cm!in!abbr=on|2=125!sqft!m2!abbr=off!sp=us}}
gives the result:
{{convert|123|cm|in|abbr=on}} |
→ | 123 cm (48 in) |
{{convert|125|sqft|m2|abbr=off|sp=us}} |
→ | 125 square feet (11,6 square meters) |
Substitution уреди
Results from invoking the module can be substituted into the current page, for example:
{{subst:#invoke:convert/show|units|length}}{{subst:#invoke:convert/show|table|1=123!cm!in!abbr=on|2=125!sqft!m2!abbr=off!sp=us}}
Substitution may be useful if editing of the resulting wikitext is required.
-- Prepare tables of wikitext to display simple documentation about
-- specified units. Data is obtained by calling Module:Convert.
-- Also provides a function to show convert usage examples.
local function collection()
-- Return a table to hold items.
return {
n = 0,
add = function (self, item)
self.n = self.n + 1
self[self.n] = item
end,
join = function (self, sep)
return table.concat(self, sep)
end,
}
end
local function strip(text)
-- Return text with no leading/trailing whitespace.
return text:match("^%s*(.-)%s*$")
end
local function frame(self_args, parent_args)
-- Simulate enough of a MediaWiki module frame for convert.
return {
args = self_args,
parent = parent_args and frame(parent_args, nil),
getParent = function (self) return self.parent end,
}
end
local cvt_function
local function call_convert(args)
if not cvt_function then
-- A testing program can set the global variable 'is_test_run'.
cvt_function = require(is_test_run and 'convert' or 'Module:Convert').convert
end
return cvt_function(frame({}, args))
end
local function maketable(results, units)
results:add('{| class="wikitable"')
results:add('! Unit code !! Unit symbol !! Unit name !! US name, if different')
for i, ucode in ipairs(units) do
local row = collection()
row:add(ucode)
local args = { '1', ucode, abbr = 'on', disp = 'unit' }
row:add(call_convert(args))
args.abbr = 'off'
local name1 = call_convert(args)
row:add(name1)
args.sp = 'us'
local name1_us = call_convert(args)
if name1_us == name1 then
row:add('')
else
row:add(name1_us)
end
results:add('|-')
results:add(strip('| ' .. row:join(' || ')))
end
results:add('|}')
results:add('')
end
-- Commonly used units for main documentation.
-- Can only be input units (not combinations or multiples).
local common_units = {
["Area"] = {
heading = "Area",
examples = { "1.5|sqmi|km2", "1.5|sqmi|km2|abbr=off", "1.5|sqmi|km2|abbr=on" },
"acre",
"ha",
"m2",
"cm2",
"km2",
"sqin",
"sqft",
"sqyd",
"sqmi",
"cda",
},
["Fuel efficiency"] = {
heading = "Fuel efficiency",
examples = { "12|mpgus|km/L", "12|mpgus|km/L|abbr=off", "12|mpgus|km/L|abbr=off|sp=us", "12|mpgus|km/L|abbr=on" },
"km/L",
"mpgimp",
"mpgus",
"L/km",
"L/100 km",
},
["Length"] = {
heading = "Length",
examples = { "123|cm|in", "123|cm|in|abbr=off|sp=us", "123|cm|in|abbr=on" },
"uin",
"in",
"ft",
"yd",
"mi",
"nmi",
"m",
"cm",
"mm",
"km",
"angstrom",
},
["Mass"] = {
heading = "Mass",
examples = { "72.3|kg|lb", "72.3|kg|lb|abbr=off", "72.3|kg|lb|abbr=on" },
"g",
"kg",
"oz",
"lb",
"st",
"LT",
"MT",
"ST",
},
["Pressure"] = {
heading = "Pressure",
examples = { "28|psi|Pa", "28|psi|Pa|abbr=off", "28|psi|Pa|abbr=on" },
"atm",
"mbar",
"psi",
"Pa",
},
["Speed"] = {
heading = "Speed",
examples = { "60|mph|km/h", "60|mph|km/h|abbr=off", "60|mph|km/h|abbr=on" },
"km/h",
"km/s",
"kn",
"mph",
},
["Temperature"] = {
heading = "Temperature",
examples = { "100|C|F", "100|C|F|abbr=off", "100|C-change|F-change", "100|C-change|F-change|abbr=out" },
"C",
"F",
"K",
"C-change",
"F-change",
"K-change",
},
["Torque"] = {
heading = "Torque",
examples = { "12.5|Nm|lb.in", "12.5|Nm|lb.in|abbr=off", "12.5|Nm|lb.in|abbr=on|lk=on" },
"lb.in",
"lb.ft",
"Nm",
},
["Volume"] = {
heading = "Volume",
examples = { "125|cuin|l", "125|cuin|l|abbr=off", "125|cuin|l|abbr=on" },
"cuin",
"cuft",
"cuyd",
"cumi",
"impgal",
"impoz",
"usgal",
"usoz",
"L",
"l",
"m3",
"cc",
"mm3",
},
}
-- Order in which sections are wanted when doing all common units.
local common_sections = {
"Area",
"Fuel efficiency",
"Length",
"Mass",
"Pressure",
"Speed",
"Temperature",
"Torque",
"Volume",
}
local function _show_examples(frame, results, examples, want_table)
local fmt
if want_table then
results:add('{|')
fmt = '|<code>%s</code>|| → ||%s'
else
fmt = '*<code>%s</code> → %s'
end
for i, item in ipairs(examples) do
if want_table and i > 1 then
results:add('|-')
end
item = item:gsub('!', '|')
item = '{{convert' .. (item:sub(1, 1) == '|' and '' or '|') .. item .. '}}'
results:add(fmt:format(mw.text.nowiki(item), frame:preprocess(item)))
end
if want_table then
results:add('|}')
end
end
local function _show_units(frame, results, args)
local do_full
if args[1] == nil then
do_full = true
args = common_sections
end
local group = collection()
for _, item in ipairs(args) do
local units = common_units[item] or common_units[item:sub(1, 1):upper() .. item:sub(2)]
if units then
if group.n > 0 then
maketable(results, group)
group = collection()
end
if do_full then
if units.heading then
results:add('===' .. units.heading .. '===')
end
if units.examples then
results:add('Examples:')
_show_examples(frame, results, units.examples)
end
end
maketable(results, units)
else
group:add(item)
end
end
if group.n > 0 then
maketable(results, group)
end
end
local function show_examples(frame, want_table)
local results = collection()
local ok, msg = pcall(_show_examples, frame, results, frame.args, want_table)
if ok then
return results:join('\n')
end
return '<strong class="error">Error</strong>\n' .. msg
end
local function show_units(frame)
local results = collection()
local ok, msg = pcall(_show_units, frame, results, frame.args)
if ok then
return results:join('\n')
end
return '<strong class="error">Error</strong>\n' .. msg
end
return {
unit = show_units,
units = show_units,
['list'] = function (frame) return show_examples(frame, false) end,
['table'] = function (frame) return show_examples(frame, true) end,
}