Difference between revisions of "Module:Demo"
(maybe this is the better way) |
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Latest revision as of 17:27, 31 March 2017
Lua error: Internal error: The interpreter has terminated with signal "11".
Usage
This module supports {{Demo}}
{{#invoke:Demo|main}}
The input must be wrapped in <nowiki>...</nowiki> tags or else it may be processed before the module can read it. If you want to use this in another module (such as to make the output prettier), you can get values like so:
require('Module:demo').get(frame)
Function get() returns a table containing:
source= the source code (without<pre>...</pre>wrappers, characters substituted with html entities)output= the execution result of the source.frame= the frame from which this template took the parameter.
By default, get() takes the first parameter of frame. If the frame uses a different parameter name for the nowiki-wrapped source, then place that name (as a string) as the second parameter, like so require('Module:demo').get(frame, 'alternate_name')
Example:
p = {}
function p.main(frame)
local parts = require('Module:demo').get(frame)
return '<Pretty html><pre>' .. parts.source .. '</pre><more pretty html>' .. parts.output .. '<even more pretty html>'
end
return p
Script error: Lua error: Internal error: The interpreter has terminated with signal "11".
local p = {}
--creates a frame object that cannot access any of the parent's args
--unless a table containing a list keys of not to inherit is provided
function disinherit(frame, onlyTheseKeys)
local parent = frame:getParent() or frame
local orphan = parent:newChild{}
orphan.getParent = parent.getParent --returns nil
orphan.args = {}
if onlyTheseKeys then
local family = {parent, frame}
for f = 1, 2 do
for k, v in pairs(family[f] and family[f].args or {}) do
orphan.args[k] = orphan.args[k] or v
end
end
parent.args = mw.clone(orphan.args)
setmetatable(orphan.args, nil)
for _, k in ipairs(onlyTheseKeys) do
rawset(orphan.args, k, nil)
end
end
return orphan, parent
end
function p.get(frame, arg, passArgs)
local orphan, frame = disinherit(frame, passArgs and {arg or 1})
local code, noWiki, preserve = frame.args[arg or 1] or ''
if code:match'nowiki' then
local placeholder, preserve = ('6'):char(), {}
code = mw.text.unstripNoWiki(code)
noWiki = code:gsub('%%', placeholder):gsub('<', '<'):gsub('>', '>')
for k in noWiki:gmatch('&.-;') do
if not preserve[k] then
preserve[k] = true
table.insert(preserve, (k:gsub('&', '&')))
noWiki = noWiki:gsub('(&.-;)', '%%%s')
end
end
noWiki = mw.text.nowiki(noWiki):format(unpack(preserve)):gsub(placeholder, '%%')
end
return {
source = noWiki or code,
output = orphan:preprocess(code):gsub(frame.args.demo_kill_categories and '%[%[Category.-%]%]' or '', ''),
frame = frame
}
end
function p.main(frame, demoTable)
local show = demoTable or p.get(frame)
local args = show.frame.args
args.br = tonumber(args.br or 1) and ('<br>'):rep(args.br or 1) or args.br or ''
if show[args.result_arg] then
return show[args.result_arg]
end
return string.format('<pre%s>%s</pre>%s%s', args.style and string.format(" style='%s'", args.style) or '', show.source, args.br, show.output)
end
--passing of args into other module without preprocessing
function p.module(frame)
local orphan, frame = disinherit(frame, {
'demo_template',
'demo_module',
'demo_module_func',
'demo_main',
'demo_br',
'demo_result_arg',
'demo_kill_categories'
})
local template = frame.args.demo_template and 'Template:'..frame.args.demo_template
local demoFunc = frame.args.demo_module_func or 'main\n'
local demoModule = require('Module:' .. frame.args.demo_module)[demoFunc:match('^%s*(.-)%s*$')]
frame.args.br, frame.args.result_arg = frame.args.demo_br, frame.args.demo_result_arg
if demoModule then
local named = {insert = function(self, ...) table.insert(self, ...) return self end}
local source = {insert = named.insert, '{{', frame.args.demo_template or frame.args.demo_module, '\n'}
if not template then
source:insert(2, '#invoke:'):insert(4, '|'):insert(5, demoFunc)
end
local insertNamed = #source + 1
for k, v in pairs(orphan.args) do
local nan, insert = type(k) ~= 'number', {v}
local target = nan and named or source
target:insert'|'
if nan then
target:insert(k):insert'=':insert'\n'
table.insert(insert, 1, #target)
end
target:insert(unpack(insert))
local nowiki = v:match('nowiki')
if nowiki or v:match('{{.-}}') then
orphan.args[k] = frame:preprocess(nowiki and mw.text.unstripNoWiki(v) or v)
end
end
source:insert'}}'
table.insert(source, insertNamed, table.concat(named))
return p.main(orphan, {
source = mw.text.encode(table.concat(source), "<>'|=~"),
output = tostring(demoModule(orphan)):gsub(frame.args.demo_kill_categories and '%[%[Category.-%]%]' or '', ''),
frame = frame
})
else
return "ERROR: Invalid module function: "..demoFunc
end
end
return p
