Difference between revisions of "Module:Hatnote list"
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Latest revision as of 17:33, 5 January 2021
Documentation for this module may be created at Module:Hatnote list/doc
--------------------------------------------------------------------------------
-- Module:Hatnote list --
-- --
-- This module produces and formats lists for use in hatnotes. In particular, --
-- it implements the for-see list, i.e. lists of "For X, see Y" statements, --
-- as used in {{about}}, {{redirect}}, and their variants. Also introduced --
-- are andList & orList helpers for formatting lists with those conjunctions. --
--------------------------------------------------------------------------------
local mArguments --initialize lazily
local mHatnote = require('Module:Hatnote')
local libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType
local p = {}
--------------------------------------------------------------------------------
-- List stringification helper functions
--
-- These functions are used for stringifying lists, usually page lists inside
-- the "Y" portion of "For X, see Y" for-see items.
--------------------------------------------------------------------------------
--default options table used across the list stringification functions
local stringifyListDefaultOptions = {
conjunction = "and",
separator = ",",
altSeparator = ";",
space = " ",
formatted = false
}
-- Stringifies a list generically; probably shouldn't be used directly
function stringifyList(list, options)
-- Type-checks, defaults, and a shortcut
checkType("stringifyList", 1, list, "table")
if #list == 0 then return nil end
checkType("stringifyList", 2, options, "table", true)
options = options or {}
for k, v in pairs(stringifyListDefaultOptions) do
if options[k] == nil then options[k] = v end
end
local s = options.space
-- Format the list if requested
if options.formatted then list = mHatnote.formatPages(unpack(list)) end
-- Set the separator; if any item contains it, use the alternate separator
local separator = options.separator
--searches display text only
function searchDisp(t, f)
return string.find(string.sub(t, (string.find(t, '|') or 0) + 1), f)
end
for k, v in pairs(list) do
if searchDisp(v, separator) then
separator = options.altSeparator
break
end
end
-- Set the conjunction, apply Oxford comma, and force a comma if #1 has "§"
local conjunction = s .. options.conjunction .. s
if #list == 2 and searchDisp(list[1], "§") or #list > 2 then
conjunction = separator .. conjunction
end
-- Return the formatted string
return mw.text.listToText(list, separator .. s, conjunction)
end
--DRY function
function conjList (conj, list, fmt)
return stringifyList(list, {conjunction = conj, formatted = fmt})
end
-- Stringifies lists with "and" or "or"
function p.andList (...) return conjList("and", ...) end
function p.orList (...) return conjList("or", ...) end
--------------------------------------------------------------------------------
-- For see
--
-- Makes a "For X, see [[Y]]." list from raw parameters. Intended for the
-- {{about}} and {{redirect}} templates and their variants.
--------------------------------------------------------------------------------
--default options table used across the forSee family of functions
local forSeeDefaultOptions = {
andKeyword = 'and',
title = mw.title.getCurrentTitle().text,
otherText = 'other uses',
forSeeForm = 'For %s, see %s.'
}
--Collapses duplicate punctuation
function punctuationCollapse (text)
local replacements = {
["%.%.$"] = ".",
["%?%.$"] = "?",
["%!%.$"] = "!",
["%.%]%]%.$"] = ".]]",
["%?%]%]%.$"] = "?]]",
["%!%]%]%.$"] = "!]]"
}
for k, v in pairs(replacements) do text = string.gsub(text, k, v) end
return text
end
-- Structures arguments into a table for stringification, & options
function p.forSeeArgsToTable (args, from, options)
-- Type-checks and defaults
checkType("forSeeArgsToTable", 1, args, 'table')
checkType("forSeeArgsToTable", 2, from, 'number', true)
from = from or 1
checkType("forSeeArgsToTable", 3, options, 'table', true)
options = options or {}
for k, v in pairs(forSeeDefaultOptions) do
if options[k] == nil then options[k] = v end
end
-- maxArg's gotten manually because getArgs() and table.maxn aren't friends
local maxArg = 0
for k, v in pairs(args) do
if type(k) == 'number' and k > maxArg then maxArg = k end
end
-- Structure the data out from the parameter list:
-- * forTable is the wrapper table, with forRow rows
-- * Rows are tables of a "use" string & a "pages" table of pagename strings
-- * Blanks are left empty for defaulting elsewhere, but can terminate list
local forTable = {}
local i = from
local terminated = false
-- Loop to generate rows
repeat
-- New empty row
local forRow = {}
-- On blank use, assume list's ended & break at end of this loop
forRow.use = args[i]
if not args[i] then terminated = true end
-- New empty list of pages
forRow.pages = {}
-- Insert first pages item if present
table.insert(forRow.pages, args[i + 1])
-- If the param after next is "and", do inner loop to collect params
-- until the "and"'s stop. Blanks are ignored: "1|and||and|3" → {1, 3}
while args[i + 2] == options.andKeyword do
if args[i + 3] then
table.insert(forRow.pages, args[i + 3])
end
-- Increment to next "and"
i = i + 2
end
-- Increment to next use
i = i + 2
-- Append the row
table.insert(forTable, forRow)
until terminated or i > maxArg
return forTable
end
-- Stringifies a table as formatted by forSeeArgsToTable
function p.forSeeTableToString (forSeeTable, options)
-- Type-checks and defaults
checkType("forSeeTableToString", 1, forSeeTable, "table")
checkType("forSeeTableToString", 2, options, "table", true)
options = options or {}
for k, v in pairs(forSeeDefaultOptions) do
if options[k] == nil then options[k] = v end
end
-- Stringify each for-see item into a list
local strList = {}
for k, v in pairs(forSeeTable) do
local useStr = v.use or options.otherText
local pagesStr = p.andList(v.pages, true) or
mHatnote._formatLink(mHatnote.disambiguate(options.title))
local forSeeStr = string.format(options.forSeeForm, useStr, pagesStr)
forSeeStr = punctuationCollapse(forSeeStr)
table.insert(strList, forSeeStr)
end
-- Return the concatenated list
return table.concat(strList, ' ')
end
-- Produces a "For X, see [[Y]]" string from arguments. Expects index gaps
-- but not blank/whitespace values. Ignores named args and args < "from".
function p._forSee (args, from, options)
local forSeeTable = p.forSeeArgsToTable(args, from, options)
return p.forSeeTableToString(forSeeTable, options)
end
-- As _forSee, but uses the frame.
function p.forSee (frame, from, options)
mArguments = require('Module:Arguments')
return p._forSee(mArguments.getArgs(frame), from, options)
end
return p
