Difference between revisions of "Module:Hatnote/sandbox"

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test>Mr. Stradivarius
(parse pages for section-only links as nil - this prevents section-only links that have an italicized page parameter from having empty <i></i> tags)
m (5 revisions imported)
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<includeonly>{{safesubst:#invoke:hatnote/sandbox|hatnote}}</includeonly><noinclude>
--                              Module:Hatnote                                --
+
{{documentation}}
--                                                                            --
+
<!-- Categories go on the /doc subpage, and interwikis go on Wikidata. -->
-- This module produces hatnote links and links to related articles. It      --
+
</noinclude>
-- implements the {{hatnote}} and {{format link}} meta-templates and includes --
 
-- helper functions for other Lua hatnote modules.                            --
 
--------------------------------------------------------------------------------
 
 
 
local libraryUtil = require('libraryUtil')
 
local checkType = libraryUtil.checkType
 
local checkTypeForNamedArg = libraryUtil.checkTypeForNamedArg
 
local mArguments -- lazily initialise [[Module:Arguments]]
 
local yesno -- lazily initialise [[Module:Yesno]]
 
 
 
local p = {}
 
 
 
--------------------------------------------------------------------------------
 
-- Helper functions
 
--------------------------------------------------------------------------------
 
 
 
local function getArgs(frame)
 
-- Fetches the arguments from the parent frame. Whitespace is trimmed and
 
-- blanks are removed.
 
mArguments = require('Module:Arguments')
 
return mArguments.getArgs(frame, {parentOnly = true})
 
end
 
 
 
local function removeInitialColon(s)
 
-- Removes the initial colon from a string, if present.
 
return s:match('^:?(.*)')
 
end
 
 
 
function p.findNamespaceId(link, removeColon)
 
-- Finds the namespace id (namespace number) of a link or a pagename. This
 
-- function will not work if the link is enclosed in double brackets. Colons
 
-- are trimmed from the start of the link by default. To skip colon
 
-- trimming, set the removeColon parameter to false.
 
checkType('findNamespaceId', 1, link, 'string')
 
checkType('findNamespaceId', 2, removeColon, 'boolean', true)
 
if removeColon ~= false then
 
link = removeInitialColon(link)
 
end
 
local namespace = link:match('^(.-):')
 
if namespace then
 
local nsTable = mw.site.namespaces[namespace]
 
if nsTable then
 
return nsTable.id
 
end
 
end
 
return 0
 
end
 
 
 
function p.formatPages(...)
 
-- Formats a list of pages using formatLink and returns it as an array. Nil
 
-- values are not allowed.
 
local pages = {...}
 
local ret = {}
 
for i, page in ipairs(pages) do
 
ret[i] = p._formatLink{link = page}
 
end
 
return ret
 
end
 
 
 
function p.formatPageTables(...)
 
-- Takes a list of page/display tables and returns it as a list of
 
-- formatted links. Nil values are not allowed.
 
local pages = {...}
 
local links = {}
 
for i, t in ipairs(pages) do
 
checkType('formatPageTables', i, t, 'table')
 
local link = t[1]
 
local display = t[2]
 
links[i] = p._formatLink{link = link, display = display}
 
end
 
return links
 
end
 
 
 
function p.makeWikitextError(msg, helpLink, addTrackingCategory, title)
 
-- Formats an error message to be returned to wikitext. If
 
-- addTrackingCategory is not false after being returned from
 
-- [[Module:Yesno]], and if we are not on a talk page, a tracking category
 
-- is added.
 
checkType('makeWikitextError', 1, msg, 'string')
 
checkType('makeWikitextError', 2, helpLink, 'string', true)
 
yesno = require('Module:Yesno')
 
title = title or mw.title.getCurrentTitle()
 
-- Make the help link text.
 
local helpText
 
if helpLink then
 
helpText = ' ([[' .. helpLink .. '|help]])'
 
else
 
helpText = ''
 
end
 
-- Make the category text.
 
local category
 
if not title.isTalkPage -- Don't categorise talk pages
 
and title.namespace ~= 2 -- Don't categorise userspace
 
and yesno(addTrackingCategory) ~= false -- Allow opting out
 
then
 
category = 'Hatnote templates with errors'
 
category = string.format(
 
'[[%s:%s]]',
 
mw.site.namespaces[14].name,
 
category
 
)
 
else
 
category = ''
 
end
 
return string.format(
 
'<strong class="error">Error: %s%s.</strong>%s',
 
msg,
 
helpText,
 
category
 
)
 
end
 
 
 
function p.disambiguate(page, disambiguator)
 
-- Formats a page title with a disambiguation parenthetical,
 
-- i.e. "Example" → "Example (disambiguation)".
 
checkType('disambiguate', 1, page, 'string')
 
checkType('disambiguate', 2, disambiguator, 'string', true)
 
disambiguator = disambiguator or 'disambiguation'
 
return string.format('%s (%s)', page, disambiguator)
 
end
 
 
 
--------------------------------------------------------------------------------
 
-- Format link
 
--
 
-- Makes a wikilink from the given link and display values. Links are escaped
 
-- with colons if necessary, and links to sections are detected and displayed
 
-- with " § " as a separator rather than the standard MediaWiki "#". Used in
 
-- the {{format link}} template.
 
--------------------------------------------------------------------------------
 
 
 
function p.formatLink(frame)
 
-- The formatLink export function, for use in templates.
 
yesno = require('Module:Yesno')
 
local args = getArgs(frame)
 
local link = args[1]
 
if not link then
 
return p.makeWikitextError(
 
'no link specified',
 
'Template:Format link#Errors',
 
args.category
 
)
 
end
 
return p._formatLink{
 
link = link,
 
display = args[2],
 
italicizePage = yesno(args.italicizepage),
 
italicizeSection = yesno(args.italicizesection),
 
}
 
end
 
 
 
local function italicize(s)
 
-- Italicize a string.
 
return '<i>' .. s .. '</i>'
 
end
 
 
 
local function maybeItalicize(s, shouldItalicize)
 
-- italicize s if s is a string and the shouldItalicize parameter is true.
 
if s and shouldItalicize then
 
return italicize(s)
 
else
 
return s
 
end
 
end
 
 
 
local function parseLink(link)
 
-- Parse a link and return a table with the link's components.
 
-- These components are:
 
-- - link: the link, stripped of any initial colon (always present)
 
-- - page: the page name (always present)
 
-- - section: the page name (may be nil)
 
-- - display: the display text, if manually entered after a pipe (may be nil)
 
link = removeInitialColon(link)
 
 
 
-- Find whether a faux display value has been added with the {{!}} magic
 
-- word.
 
local prePipe, display = link:match('^(.-)|(.*)$')
 
link = prePipe or link
 
 
 
-- Find the page, if it exists.
 
-- For links like [[#Bar]], the page will be nil.
 
local preHash, postHash = link:match('^(.-)#(.*)$')
 
local page
 
if not preHash then
 
-- We have a link like [[Foo]].
 
page = link
 
elseif preHash ~= '' then
 
-- We have a link like [[Foo#Bar]].
 
page = preHash
 
end
 
 
 
-- Find the section, if it exists.
 
local section
 
if postHash and postHash ~= '' then
 
section = postHash
 
end
 
 
return {
 
link = link,
 
page = page,
 
section = section,
 
display = display,
 
}
 
end
 
 
 
function p._formatLink(options)
 
-- The formatLink export function, for use in modules.
 
checkType('_formatLink', 1, options, 'table')
 
checkTypeForNamedArg('_formatLink', 'link', options.link, 'string', false)
 
checkTypeForNamedArg(
 
'_formatLink',
 
'display',
 
options.display,
 
'string',
 
true
 
)
 
checkTypeForNamedArg(
 
'_formatLink',
 
'italicizePage',
 
options.italicizePage,
 
'boolean',
 
true
 
)
 
checkTypeForNamedArg(
 
'_formatLink',
 
'italicizeSection',
 
options.italicizeSection,
 
'boolean',
 
true
 
)
 
 
 
local parsed = parseLink(options.link)
 
local display = options.display or parsed.display
 
 
-- Deal with the case where we don't have to pipe the link
 
if not display and not parsed.section and not options.italicizePage then
 
return string.format('[[:%s]]', parsed.link)
 
end
 
 
-- Find the display text for piped links
 
if not display then
 
local page = maybeItalicize(parsed.page, options.italicizePage)
 
local section = maybeItalicize(parsed.section, options.italicizeSection)
 
if not page then
 
display = string.format('§&nbsp;%s', section)
 
elseif section then
 
display = string.format('%s §&nbsp;%s', page, section)
 
else
 
display = page
 
end
 
end
 
 
return string.format('[[:%s|%s]]', parsed.link, display)
 
end
 
 
 
--------------------------------------------------------------------------------
 
-- Hatnote
 
--
 
-- Produces standard hatnote text. Implements the {{hatnote}} template.
 
--------------------------------------------------------------------------------
 
 
 
function p.hatnote(frame)
 
local args = getArgs(frame)
 
local s = args[1]
 
local options = {}
 
if not s then
 
return p.makeWikitextError(
 
'no text specified',
 
'Template:Hatnote#Errors',
 
args.category
 
)
 
end
 
options.extraclasses = args.extraclasses
 
options.selfref = args.selfref
 
return p._hatnote(s, options)
 
end
 
 
 
function p._hatnote(s, options)
 
checkType('_hatnote', 1, s, 'string')
 
checkType('_hatnote', 2, options, 'table', true)
 
options = options or {}
 
local classes = {'hatnote', 'navigation-not-searchable'}
 
local extraclasses = options.extraclasses
 
local selfref = options.selfref
 
if type(extraclasses) == 'string' then
 
classes[#classes + 1] = extraclasses
 
end
 
if selfref then
 
classes[#classes + 1] = 'selfref'
 
end
 
return string.format(
 
'<div role="note" class="%s">%s</div>',
 
table.concat(classes, ' '),
 
s
 
)
 
end
 
 
 
return p
 

Revision as of 16:10, 6 September 2020

Module documentation[view] [edit] [history] [purge]

This template produces formatted text, following the guideline for a Wikipedia hatnote.

{{hatnote|Example hatnote text.}}

Broadly speaking, a hatnote should answer a reader's question (maybe preemptively): Am I on the right page?

Function

This template is primarily used to add a correctly formatted hatnote to a page. Often, but not always, this is a disambiguation link at the top of article pages. It places an HTML div- / div block around the text entered as its only argument, which provides standardized formatting (contents are indented and italicized in most displays); it also isolates the contained code to make sure that it is interpreted correctly.

This template is also used as the "meta-template" for additional specialized disambiguation link templates; see Category:Hatnote templates for a list.

The template does not automatically create links of any kind. Links and other desired formatting must be explicitly added, using normal Wikipedia markup.

Usage

Basic usage
{{hatnote|text}}
All parameters
{{hatnote|text|extraclasses=extra classes|selfref=yes|category=no}}

Parameters

This template accepts the following parameters:

  • 1 – the hatnote text (required)
  • extraclasses – any extra CSS classes to be added, for example, the {{see also}} template adds the classes "|extraclasses=boilerplate seealso".
  • selfref – If set to "yes", "y", "true" or "1", adds the CSS class "selfref". This is used to denote self-references to Wikipedia. See Template:Selfref for more information.
  • category – If set to "no", "n", "false", or "0", suppresses the error tracking category (Category:Hatnote templates with errors). This has an effect only if the leftmost parameter (the hatnote text) is omitted.

Example

  • {{hatnote|Example hatnote text}}

Errors

If no hatnote text is supplied, the template will output the following message:

  • Error: no text specified (help).

If you see this error message, it is for one of four reasons:

  1. No parameters were specified (the template code was {{hatnote}}). Please use {{hatnote|text}} instead.
  2. Some parameters were specified, but the hatnote text wasn't included. For example, the template text {{hatnote|extraclasses=seealso}} will produce this error. Please use (for example) {{hatnote|text|extraclasses=seealso}} instead.
  3. The hatnote text was specified, but that text contains an equals sign ("="). The equals sign has a special meaning in template code, and because of this it cannot be used in template parameters that do not specify a parameter name. For example, the template code {{hatnote|2+2=4}} will produce this error. To work around this, you can specify the parameter name explicitly by using 1= before the hatnote text, like this: {{hatnote|1=2+2=4}}.
  4. You tried to access Module:Hatnote directly by using {{#invoke:hatnote|hatnote|text}}. Use of #invoke in this way has been disabled for performance reasons. Please use {{hatnote|text}} instead.

If you see this error message and are unsure of what to do, please post a message on Template talk:Hatnote, and someone should be able to help you.

Pages that contain this error message are tracked in Category:Hatnote templates with errors.

Technical details

The HTML code produced by this template looks like this:

  • <div role="note" class="hatnote">hatnote text</div>

The code is produced by Module:Hatnote.

See also

TemplateData documentation used by VisualEditor and other tools
See the monthly parameter usage report for this template.

TemplateData for Hatnote

Template for creating a standard Wikipedia hatnote. A hatnote is a short note placed at the top of an article to provide disambiguation of closely related terms or summarise a topic, explaining its boundaries.

Template parameters

ParameterDescriptionTypeStatus
Text1

This field should contain the text that will be displayed in the hatnote.

Stringrequired
Extra classesextraclasses

Extra CSS classes to be added to the <div> tags surrounding the hatnote text.

Lineoptional
Self referenceselfref

Set to "yes" if the hatnote text is a self-reference to Wikipedia that would not make sense on mirrors or forks of the Wikipedia site. (E.g. "For the Wikipedia Sandbox, see [[WP:SAND]]".)

Lineoptional
Categorycategory

Set to "no", "n", "false", or "0" to suppresses the error tracking category (Category:Hatnote templates with errors). This only has an effect if the hatnote text is omitted.

Unknownoptional