imported>Erutuon: fix errorf

2018-08-30T00:29:15Z

fix errorf

New page

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)
end
end

-- from [[Template:Unichar]]
local styles = {
smallcaps = 'class="smallcaps" style="font-variant: small-caps; font-size: smaller;"',
monospace = 'style="font-family: monospace, monospace;"', -- why repeat it?
background_color = 'style="background: lightblue;"', -- for space characters
}
local function style(text, type)
if not styles[type] then
errorf("Style %s not recognized", type)
end
return ('<span %s>%s</span>'):format(styles[type], text)
end

local U = mw.ustring.char
local 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 ""
end
end

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 codepoint
end

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

Module:Unichar - Revision history

imported>Erutuon: fix errorf