模块:Row numbers
Onlyforyou（讨论 | 贡献）2021年11月16日 (二) 14:09的版本 （创建页面，内容为“local count; local hcount; --[[--------------------------< G E T _ C O U N T >------------------------------------------------------------ returns a counter value…”）
此模块的文档可以在模块:Row numbers/doc创建
local count;
local hcount;
--[[--------------------------< G E T _ C O U N T >------------------------------------------------------------
returns a counter value according to the keyword extracted from the table; maintains count and hcount. Inserts
a space character ahead of <count> or <hcount> so that, in the case of negative indexes, the negation operator
is not mistaken for part of the wikitable markup. Returns:
| -<count> – a cell value
instead of:
|-<count> – row markup with extraneous text
The keywords have the meanings:
_row_count: use row counter value (count); the hold counter (hcount) is same as count
_row_count_hold: use the value currently assigned to hcount; bump count but do not bump hcount
]]
local function get_count (keyword)
count = count + 1; -- always bump the count
if '_row_count' == keyword then -- bump hcount, return new count value
hcount = count;
return ' ' .. count; -- insert a leading space ahead of count
elseif '_row_count_hold' == keyword then -- current hcount value without increment
return ' ' .. hcount; -- insert a leading space ahead of hcount
end
end
--[[--------------------------< R O W _ N U M B E R S >--------------------------------------------------------
replaces keywords _row_count and _row_count_hold from the table in frame.args[1]
]]
local function row_numbers (frame)
local args = frame.args[1] and frame.args or frame:getParent().args;
-- Only use if |index is a number; |index= may be omitted (nil), or empty string, or non-digit
-- We subtract one because the get_count function increments this before use.
count = (tonumber(args.index) or 1) - 1;
local tbl_str;
-- Find out if what we got for input has been wrapped in <nowiki>...</nowiki> tags
if args[1]:match ('^%s*\127[^\127]*UNIQ%-%-nowiki%-%x%x%x%x%x%x%x%x%-QINU[^\127]*\127%s*$') then
-- BUG. The <nowiki> trick does not work in VisualEditor, mobile app, or Special:ExpandTemplates.
-- get the table from the nowiki tags passed as arguments
tbl_str = mw.text.unstripNoWiki (args[1]);
-- undo <nowiki>'s escaping of the wikitext (mw.text.decode (tbl_str); is too aggressive)
tbl_str = tbl_str:gsub('<', '<'):gsub('>', '>');
else
-- No MediaWiki bugs here (hopefully), but you need to escape = signs with {{=}} like normal.
-- It is not possible to circumvent this because named parameters are not passed to Lua in a
-- defined order, always have whitespace trimmed, etc.
local parts = {}
for _, str in ipairs(args) do
table.insert(parts, str)
end
tbl_str = table.concat(parts, '|');
end
-- if there is at least one of our special reserved words, replace it with a count
return frame:preprocess (tbl_str:gsub('_row_count[_%w]*', get_count));
end
--[[--------------------------< E X P O R T E D F U N C T I O N S >------------------------------------------
]]
return {
row_numbers = row_numbers
}
