Module:Footnotes
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 | This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing. |
Implements {{sfn}}, {{harvard citation}}, and variants of those templates.
External links[edit source]
- Module:Footnotes at Wikipedia, the free Terran-based encyclopedia that anyone can edit.
require('Module:No globals');
--[[--------------------------< A R G S _ D E F A U L T >------------------------------------------------------
a table to specify initial values.
]]
local args_default = {
bracket_left = '',
bracket_right = '',
bracket_year_left = '',
bracket_year_right = '',
postscript = '',
page = '',
pages = '',
location = '',
page_sep = ", p. ",
pages_sep = ", pp. ",
ref = '',
};
--[[--------------------------< I S _ Y E A R >----------------------------------------------------------------
evaluates param to see if it is one of these forms with or without lowercase letter disambiguator:
YYYY
n.d.
nd
c. YYYY
YYYY–YYYY (separator is endash)
YYYY–YY (separator is endash)
return true when param has a recognized form; false else
]]
local function is_year (param)
return mw.ustring.match (param, '^%d%d%d%d?%l?$') or
mw.ustring.match (param, '^n%.d%.%l?$') or
mw.ustring.match (param, '^nd%l?$') or
mw.ustring.match (param, '^c%. %d%d%d%d?%l?$') or
mw.ustring.match (param, '^%d%d%d%d–%d%d%d%d%l?$') or
mw.ustring.match (param, '^%d%d%d%d–%d%d%l?$');
end
--[[--------------------------< C O R E >----------------------------------------------------------------------
returns an anchor link (CITEREF) formed from one to four author names, year, and insource location (|p=, |pp=, loc=)
]]
local function core( args )
local result;
if args.P5 ~= '' then
if is_year (args.P5) then
result = table.concat ({args.P1, ' et al. ', args.bracket_year_left, args.P5, args.bracket_year_right});
else
args.P5 = ''; -- when P5 not a year don't include in anchor
result = table.concat ({args.P1, ' et al.'}); -- and don't render it
end
elseif args.P4 ~= '' then
if is_year (args.P4) then
result = table.concat ({args.P1, ', ', args.P2, ' & ', args.P3, ' ', args.bracket_year_left, args.P4, args.bracket_year_right}); -- three names and a year
else
result = table.concat ({args.P1, ' et al.'}); -- four names
end
elseif args.P3 ~= '' then
if is_year (args.P3) then
result = table.concat ({args.P1, ' & ', args.P2, ' ', args.bracket_year_left, args.P3, args.bracket_year_right}); -- two names and a year
else
result = table.concat ({args.P1, ', ', args.P2, ' ', ' & ', args.P3}); -- three names
end
elseif args.P2 ~= '' then
if is_year (args.P2) then
result = table.concat ({args.P1, ' ', args.bracket_year_left, args.P2, args.bracket_year_right}); -- one name and year
else
result = table.concat ({args.P1, ' & ', args.P2}); -- two names
end
else
result = args.P1; -- one name
end
-- when author-date result ends with a dot (typically when the last positional parameter holds 'n.d.')
-- and when no in-source location (no |p=, |pp=, or |loc=)
-- and when the first or only character in args.postscript is a dot
-- remove the author-date result trailing dot
-- the author-date result trailing dot will be replaced later with the content of args.postscript (usually a dot)
if ('.' == result:sub(-1)) and ('.' == args.postscript:sub(1)) and ('' == args.page) and ('' == args.pages) and ('' == args.location) then
result = result:gsub ('%.$', '');
end
if args.ref ~= 'none' then
if args.ref ~= '' then
result = table.concat ({'[[#', mw.uri.anchorEncode (args.ref), '|', result, ']]'});
else
result = table.concat ({'[[#CITEREF', mw.uri.anchorEncode (table.concat ({args.P1, args.P2, args.P3, args.P4, args.P5})), '|', result, ']]'});
end
end
if args.page ~= '' then
result = table.concat ({result, args.page_sep, args.page});
elseif args.pages ~= ''then
result = table.concat ({result, args.pages_sep, args.pages});
end
if args.location ~= '' then
result = table.concat ({result, ', ', args.location});
end
result = table.concat ({args.bracket_left, result, args.bracket_right, args.postscript}):gsub ('%s+', ' '); -- strip redundant spaces
return result;
end
--[[--------------------------< A R G S _ F E T C H >---------------------------------------------------------
Because all of the templates share a common set of parameters, a single common function to fetch those parameters
from frame and parent frame.
]]
local function args_fetch (frame, ps)
local args = args_default; -- create a copy of the default table
local pframe = frame:getParent(); -- point to the template's parameter table
for k, v in pairs (frame.args) do -- override defaults with values provided in the #invoke: if any
args[k] = v;
end
args.postscript = pframe.args.postscript or pframe.args.ps or ps;
if 'none' == args.postscript then
args.postscript = '';
end
args.page = pframe.args.p or pframe.args.page or '';
args.pages = pframe.args.pp or pframe.args.pages or '';
args.location = pframe.args.loc or '';
args.ref = pframe.args.ref or pframe.args.Ref or '';
for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- loop through the five positional parameters and trim if set else empty string
args[v] = (pframe.args[i] and mw.text.trim (pframe.args[i])) or '';
end
return args;
end
--[[--------------------------< H A R V A R D _ C I T A T I O N >----------------------------------------------
common entry point for:
{{harvard citation}} aka {{harv}}
{{Harvard citation no brackets}} aka {{harvnb}}
{{harvcol}}
{{harvcolnb}}
{{harvcoltxt}}
{{Harvard citation text}} aka {{harvtxt}}
{{Harvp}}
Distinguishing features (brackets and page separators) are specified in this module's {{#invoke}} in the respective templates.
]]
local function harvard_citation (frame)
local args = args_fetch (frame, ''); -- get the template and invoke parameters; default postscript is empty string
return core (args);
end
--[[--------------------------< S T R I P _ U R L >------------------------------------------------------------
used by sfn() and sfnm(). This function fixes an issue with reference tooltip gadget where the tooltip is not displayed
when an insource locator (|p=, |pp=, |loc=) has an external wikilink that contains a # character
strip uri-reserved characters from urls in |p=, |pp-, and |loc= parameters The researved characters are:
!#$&'()*+,/:;=?@[]
]]
local function strip_url (pages)
local escaped_uri;
if not pages or ('' == pages) then
return pages;
end
for uri in pages:gmatch ('%[(%a[%w%+%.%-]*://%S+)') do -- for each external link get the uri
escaped_uri = uri:gsub ("([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" ); -- save a copy with lua pattern characters escaped
uri = uri:gsub ("[!#%$&'%(%)%*%+,/:;=%?@%[%]%.%%]", ''); -- remove reserved characters and '%' because '%20' (space character) is a lua 'invalid capture index'
pages = pages:gsub (escaped_uri, uri, 1); -- replace original uri with the stripped version
end
return pages;
end
--[[--------------------------< S F N >------------------------------------------------------------------------
entry point for {{sfn}} and {{sfnp}}
]]
local function sfn (frame)
local args = args_fetch (frame, '.'); -- get the template and invoke parameters; default postscript is a dot
local result = core (args); -- go make a CITEREF anchor
-- put it all together and then strip redundant spaces
local name = table.concat ({'FOOTNOTE', args.P1, args.P2, args.P3, args.P4, args.P5, strip_url (args.page), strip_url (args.pages), strip_url (args.location)}):gsub ('%s+', ' ');
return frame:extensionTag ({name='ref', args={name=name}, content=result});
end
--[[--------------------------< S F N M >----------------------------------------------------------------------
common entry point for {{sfnm}} and {{sfnmp}}
Distinguishing features (brackets) are specified in this module's {{#invoke}} in the respective templates.
]]
local function sfnm (frame)
local args = args_default; -- create a copy of the default table
local pframe = frame:getParent(); -- point to the template's parameter table
local n = 1; -- index of source; this is the 'n' in na1, ny, etc
local first_pnum = 1; -- first of a pair of positional parameters
local second_pnum = 2; -- second of a pair of positional parameters
local last_ps = 0; -- index of the last source with |nps= set
local last_index = 0; -- index of the last source; these used to determine which of |ps= or |nps= will terminate the whole rendering
local out = {}; -- table to hold rendered sources
local footnote = {'FOOTNOTE'}; -- all author, date, insource location stuff becomes part of the reference's footnote id; added as we go
for k, v in pairs (frame.args) do -- override defaults with values provided in the #invoke: if any
args[k] = v;
end
while true do
if not pframe.args[table.concat ({n, 'a1'})] and not pframe.args[first_pnum] then
break; -- no na1 or matching positional parameter so done
end
if pframe.args[table.concat ({n, 'a1'})] then -- does this source use named parameters?
for _, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- initialize for this source
args[v] = '';
end
for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- extract author and year parameters for this source
args[v] = pframe.args[table.concat ({n, 'a', i})] or ''; -- attempt to assign author name
if '' == args[v] then -- when there wasn't an author name
args[v] = pframe.args[table.concat ({n, 'y'})] or ''; -- attempt to assign year
break; -- done with author/date for this source
end
end
else -- this source uses positional parameters
args.P1 = mw.text.trim (pframe.args[first_pnum]); -- yes, only one author supported
args.P2 = (pframe.args[second_pnum] and mw.text.trim (pframe.args[second_pnum])) or ''; -- when positional author, year must also be positional
for _, v in ipairs ({'P3', 'P4', 'P5'}) do -- blank the rest of these for this source
args[v] = '';
end
first_pnum = first_pnum + 2; -- source must use positional author and positional year
second_pnum = first_pnum + 1; -- bump these for possible next positional source
end
args.postscript = pframe.args[table.concat ({n, 'ps'})] or '';
if 'none' == args.postscript then -- this for compatibility with other footnote templates; does nothing
args.postscript = '';
end
args.ref = pframe.args[table.concat ({n, 'ref'})] or ''; -- alternate reference for this source
args.page = pframe.args[table.concat ({n, 'p'})] or ''; -- insource locations for this source
args.pages = pframe.args[table.concat ({n, 'pp'})] or '';
args.location = pframe.args[table.concat ({n, 'loc'})] or '';
table.insert (out, core (args)); -- save the rendering of this source
for k, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- create the FOOTNOTE id
if '' ~= args[v] then
table.insert (footnote, args[v]);
end
end
for k, v in ipairs ({'page', 'pages', 'location'}) do -- these done separately so that we can strip uri-reserved characters from extlinked page numbers
if '' ~= args[v] then
table.insert (footnote, strip_url (args[v]))
end
end
last_index = n; -- flags used to select terminal postscript from nps or from end_ps
if '' ~= args.postscript then
last_ps = n;
end
n = n+1; -- bump for the next one
end
local name = table.concat (footnote):gsub ('%s+', ' '); -- put the footnote together and strip redundant space
args.end_ps = pframe.args.postscript or pframe.args.ps or '.'; -- this is the postscript for the whole not for the individual sources
if 'none' == args.end_ps then -- not an original sfnm parameter value; added for compatibility with other footnote templates
args.end_ps = '';
end
local result = table.concat ({table.concat (out, '; '), (last_index == last_ps) and '' or args.end_ps});
return frame:extensionTag ({name='ref', args={name=name}, content=result});
end
--[[--------------------------< E X P O R T T A B L E >------------------------------------------------------
]]
return {
harvard_citation = harvard_citation,
sfn = sfn,
sfnm = sfnm,
};