Module:Unichar Explained

local p =

local Unicode_data = require "Module:Unicode data"

local function errorf(level, ...) if type(level)

"number" then return error(string.format(...), level + 1) else -- level is actually the format string. return error(string.format(level, ...), 2) endend

-- from local styles = local function style(text, type) if not styles[type] then errorf("Style %s not recognized", type) end return ('

%s'):format(styles[type], text)end

local U = mw.ustring.charlocal function show(codepoint) -- Format characters that at least are visible to me. -- The parentheses will short-circuit the evaluation of some of the conditions. -- Arabic number sign, Arabic sign sanah, Arabic footnote marker, Arabic sign safha, Arabic sign samvat if 0x600 <= codepoint and (codepoint <= 0x604 -- Arabic end of ayah, Syriac abbreviation mark, Arabic disputed end of ayah or codepoint

0x6DD or codepoint

0x70F or codepoint

0x8E2 -- interlinear annotation anchor, separator, terminator or 0xFFF9 <= codepoint and (codepoint <= 0xFFFB -- shorthand format letter overlap, continuing overlap, downstep or 0x1BCA0 <= codepoint and codepoint <= 0x1BCA3)) or Unicode_data.is_printable(codepoint) then local printed_codepoint = U(codepoint) if mw.ustring.toNFC(printed_codepoint) ~= printed_codepoint then -- Prevent MediaWiki software from normalizing the character. printed_codepoint = ("&#x%X;"):format(codepoint) end if Unicode_data.is_combining(codepoint) then printed_codepoint = "◌" .. printed_codepoint end if Unicode_data.is_whitespace(codepoint) then printed_codepoint = style(printed_codepoint, "background_color") end return printed_codepoint else return "" endend

local function u_plus(codepoint) return ("U+%04X"):format(codepoint)end

local function get_codepoint(args, arg) local val = args[arg] local is_negative = false if type(val) ~= "string" then errorf("code point in hexadecimal expected, got %s", type(val)) elseif val:find('^%s*%-') then -- Negative number strings yield a bizarre value: -- tonumber("-1", 16) -> 1.844674407371e+19. -- Strip initial minus. val = val:match("%-(.+)") is_negative = true end local codepoint = tonumber(val, 16) or errorf("code point in hexadecimal expected, got %q", val) if is_negative then codepoint = -codepoint end if not (0 <= codepoint and codepoint <= 0x10FFFF) then errorf("code point %d out of range", codepoint) end return codepointend

function p.unichar(frame) local args = frame.args[1] and frame.args or frame:getParent.args local codepoint = get_codepoint(args, 1) local name_or_label = Unicode_data.lookup_name(codepoint) local is_label = name_or_label:sub(1, 1)

"<" return ("%s %s %s"):format(style(u_plus(codepoint), "monospace"), show(codepoint), is_label and name_or_label or style(name_or_label, "smallcaps"))end

return p