local m_str_utils = require("Module:string utilities")
local cp = m_str_utils.codepoint
local gcodepoint = m_str_utils.gcodepoint
local gsub = string.gsub
local u = m_str_utils.char
local export = {}
local udata = mw.loadData("Module:Unicode data/data")
local floor = math.floor
local function errorf(first_arg, ...)
if type(first_arg) == "number" then
return error(string.format(...), first_arg + 1)
else
return error(string.format(first_arg, ...), 2)
end
end
local function binary_range_search(codepoint, ranges)
local low, mid, high
low, high = 1, ranges.length or require "Module:table".length(ranges)
while low <= high do
mid = floor((low + high) / 2)
local range = ranges[mid]
if codepoint < range[1] then
high = mid - 1
elseif codepoint <= range[2] then
return range, mid
else
low = mid + 1
end
end
return nil, mid
end
export.binary_range_search = binary_range_search
local function linear_range_search(codepoint, ranges)
for i, range in ipairs(ranges) do
if codepoint < range[1] then
break
elseif codepoint <= range[2] then
return range
end
end
end
-- Load a module by indexing "loader" with the name of the module minus the
-- "Module:Unicode data/" part. For instance, loader.blocks returns
-- [[Module:Unicode data/blocks]]. If a module cannot be loaded, false will be
-- returned.
local loader = setmetatable({}, {
__index = function (self, key)
local success, data = pcall(mw.loadData, "Module:Unicode data/" .. key)
if not success then
data = false
end
self[key] = data
return data
end
})
-- For the algorithm used to generate Hangul Syllable names,
-- see "Hangul Syllable Name Generation" in section 3.12 of the
-- Unicode Specification:
-- https://www.unicode.org/versions/latest/ch03.pdf
-- For most of the name rules given here, see the subsection
-- "Unicode Name Property" in section 4.8 (Name) and the table 4-8
-- (Name Derivation Rule Prefix Strings):
-- https://www.unicode.org/versions/latest/ch04.pdf
local name_hooks = {
{ 0x00, 0x1F, "<control-%04X>" }, -- C0 control characters
{ 0x7F, 0x9F, "<control-%04X>" }, -- DEL and C1 control characters
{ 0x3400, 0x4DBF, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension A
{ 0x4E00, 0x9FFF, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph
{ 0xAC00, 0xD7A3, function (codepoint) -- Hangul Syllables
local Hangul_data = loader.Hangul
local syllable_index = codepoint - 0xAC00
return ("HANGUL SYLLABLE %s%s%s"):format(
Hangul_data.leads[floor(syllable_index / Hangul_data.final_count)],
Hangul_data.vowels[floor((syllable_index % Hangul_data.final_count)
/ Hangul_data.trail_count)],
Hangul_data.trails[syllable_index % Hangul_data.trail_count]
)
end },
-- High Surrogates, High Private Use Surrogates, Low Surrogates
{ 0xD800, 0xDFFF, "<surrogate-%04X>" },
{ 0xE000, 0xF8FF, "<private-use-%04X>" }, -- Private Use
-- CJK Compatibility Ideographs
{ 0xF900, 0xFA6D, "CJK COMPATIBILITY IDEOGRAPH-%04X" },
{ 0xFA70, 0xFAD9, "CJK COMPATIBILITY IDEOGRAPH-%04X" },
{ 0x17000, 0x187F7, "TANGUT IDEOGRAPH-%04X" }, -- Tangut
{ 0x18800, 0x18AFF, function (codepoint)
return ("TANGUT COMPONENT-%03d"):format(codepoint - 0x187FF)
end },
{ 0x18B00, 0x18CD5, "KHITAN SMALL SCRIPT CHARACTER-%04X" },
{ 0x18D00, 0x18D08, "TANGUT IDEOGRAPH-%04X" }, -- Tangut Supplement
{ 0x1B170, 0x1B2FB, "NUSHU CHARACTER-%04X" }, -- Nüshu
{ 0x20000, 0x2A6DF, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension B
{ 0x2A700, 0x2B739, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension C
{ 0x2B740, 0x2B81D, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension D
{ 0x2B820, 0x2CEA1, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension E
{ 0x2CEB0, 0x2EBE0, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension F
{ 0x2EBF0, 0x2EE5D, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension I
-- CJK Compatibility Ideographs Supplement (Supplementary Ideographic Plane)
{ 0x2F800, 0x2FA1D, "CJK COMPATIBILITY IDEOGRAPH-%04X" },
{ 0x30000, 0x3134A, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension G
{ 0x31350, 0x323AF, "CJK UNIFIED IDEOGRAPH-%04X" }, -- CJK Ideograph Extension H
{ 0xE0100, 0xE01EF, function (codepoint) -- Variation Selectors Supplement
return ("VARIATION SELECTOR-%d"):format(codepoint - 0xE0100 + 17)
end},
{ 0xF0000, 0xFFFFD, "<private-use-%04X>" }, -- Plane 15 Private Use
{ 0x100000, 0x10FFFD, "<private-use-%04X>" } -- Plane 16 Private Use
}
name_hooks.length = #name_hooks
--[[ Add another - in this line to test the code point ordering in name_hooks.
local i = 1
local function print_it(a, b, c)
if type(c) == "string" then
mw.log(c:format(a), c:format(b))
else
mw.log(c(a), c(b))
end
end
while true do
local first, second = name_hooks[i], name_hooks[i + 1]
if not (first and second) then break end
local message
if not (first[1] < first[2] and first[2] < second[1] and second[1] < second[2]) then
message = "Bad name label ordering at index " .. i .. ":"
elseif second[1] == first[2] + 1 and second[3] == first[3] then
message = "Name hooks can be merged at index " .. i .. ":"
end
if message then
mw.log(message)
print_it(unpack(first))
print_it(unpack(second))
end
i = i + 1
end
--]]
local name_range_cache
local function generate_name(data, codepoint)
if type(data) == "string" then
return data:format(codepoint)
else
return data(codepoint)
end
end
--[[
-- Checks that the code point is a number and in range.
-- Does not check whether code point is an integer.
-- Not used
local function check_codepoint(funcName, argIdx, val)
require 'libraryUtil'.checkType(funcName, argIdx, val, 'number')
if codepoint < 0 or 0x10FFFF < codepoint then
errorf("Codepoint %04X out of range", codepoint)
end
end
--]]
-- https://www.unicode.org/versions/latest/ch04.pdf, section 4.8
function export.lookup_name(codepoint)
-- U+FDD0-U+FDEF and all code points ending in FFFE or FFFF are Unassigned
-- (Cn) and specifically noncharacters:
-- https://www.unicode.org/faq/private_use.html#nonchar4
if 0xFDD0 <= codepoint and (codepoint <= 0xFDEF
or floor(codepoint % 0x10000) >= 0xFFFE) then
return ("<noncharacter-%04X>"):format(codepoint)
end
if name_range_cache -- Check if previously used "name hook" applies to this code point.
and codepoint >= name_range_cache[1]
and codepoint <= name_range_cache[2] then
return generate_name(name_range_cache[3], codepoint)
end
local range = binary_range_search(codepoint, name_hooks)
if range then
name_range_cache = range
return generate_name(range[3], codepoint)
end
local data = loader[('names/%03X'):format(codepoint / 0x1000)]
if data and data[codepoint] then
return data[codepoint]
-- Unassigned (Cn) consists of noncharacters and reserved characters.
-- The character has been established not to be a noncharacter,
-- and if it were assigned, its name would already been retrieved,
-- so it must be reserved.
else
return ("<reserved-%04X>"):format(codepoint)
end
end
function export.lookup_image(codepoint)
local data = loader[('images/%03X'):format(codepoint / 0x1000)]
if data then
return data[codepoint]
end
end
function export.lookup_image_emoji(codepoint)
local data = loader[('emoji_images/%03X'):format(codepoint / 0x1000)]
if data then
return data[codepoint]
end
end
-- Load [[Module:Unicode data/blocks]] if needed and assign it to this variable.
local blocks
local function block_iter(blocks, i)
i = i + 1
local data = blocks[i]
if data then
-- Unpack doesn't work on tables loaded with mw.loadData.
return i, data[3], data[1], data[2]
end
end
-- An ipairs-type iterator generator for the list of blocks.
function export.enum_blocks()
local blocks = loader.blocks
return block_iter, blocks, 0
end
function export.get_block_range(name)
local range
for i, block in ipairs(loader.blocks) do
if block[3] == name then
range = block
end
end
if range then
return range[1], range[2]
end
end
function export.lookup_plane(codepoint)
local i = floor(codepoint / 0x10000)
return udata.planes[i] or ("Plane %u"):format(i)
end
function export.lookup_block(codepoint)
local blocks = loader.blocks
local range = binary_range_search(codepoint, blocks)
if range then
return range[3]
else
return "No Block"
end
end
function export.get_block_info(name)
for i, block in ipairs(loader.blocks) do
if block[3] == name then
return block
end
end
end
function export.is_valid_pagename(pagename)
local has_nonws = false
for codepoint in gcodepoint(pagename) do
if (codepoint == 0x0023) -- #
or (codepoint == 0x005B) -- [
or (codepoint == 0x005D) -- ]
or (codepoint == 0x007B) -- {
or (codepoint == 0x007C) -- |
or (codepoint == 0x007D) -- }
or (codepoint == 0x180E) -- MONGOLIAN VOWEL SEPARATOR
or ((codepoint >= 0x2000) and (codepoint <= 0x200A)) -- spaces in General Punctuation block
or (codepoint == 0xFFFD) -- REPLACEMENT CHARACTER
then
return false
end
local printable, result = export.is_printable(codepoint)
if not printable then
return false
end
if result ~= "space-separator" then
has_nonws = true
end
end
return has_nonws
end
local function manual_unpack(what, from)
if what[from + 1] == nil then
return what[from]
end
local result = {}
from = from or 1
for i, item in ipairs(what) do
if i >= from then
table.insert(result, item)
end
end
return unpack(result)
end
local function compare_ranges(range1, range2)
return range1[1] < range2[1]
end
-- Creates a function to look up data in a module that contains "singles" (a
-- code point-to-data map) and "ranges" (an array containing arrays that contain
-- the low and high code points of a range and the data associated with that
-- range).
-- "loader" loads and returns the "singles" and "ranges" tables.
-- "match_func" is passed the code point and either the data or the "dots", and
-- generates the final result of the function.
-- The varargs ("dots") describes the default data to be returned if there wasn't
-- a match.
-- In case the function is used more than once, "cache" saves ranges that have
-- already been found to match, or a range whose data is the default if there
-- was no match.
local function codepoint_lookup(data_module_subpage, match_func, ...)
local dots = { ... }
local cache = {}
local singles, ranges
return function (codepoint)
if not singles then
local data_module = loader[data_module_subpage]
singles, ranges = data_module.singles, data_module.ranges
end
if singles[codepoint] then
return match_func(codepoint, singles[codepoint])
end
local range = binary_range_search(codepoint, cache)
if range then
return match_func(codepoint, manual_unpack(range, 3))
end
local range, index = binary_range_search(codepoint, ranges)
if range then
table.insert(cache, range)
table.sort(cache, compare_ranges)
return match_func(codepoint, manual_unpack(range, 3))
end
if ranges[index] then
local dots_range
if codepoint > ranges[index][2] then
dots_range = {
ranges[index][2] + 1,
ranges[index + 1] and ranges[index + 1][1] - 1 or 0x10FFFF,
unpack(dots)
}
else -- codepoint < range[index][1]
dots_range = {
ranges[index - 1] and ranges[index - 1][2] + 1 or 0,
ranges[index][1] - 1,
unpack(dots)
}
end
table.insert(cache, dots_range)
table.sort(cache, compare_ranges)
end
return match_func(codepoint, unpack(dots))
end
end
-- Return a character's combining class value from [[Module:Unicode data/combining classes]],
-- or otherwise 0, which is treated as the default value.
do
local combining
function export.combining_class(ch)
combining = combining or mw.loadData("Module:Unicode data/combining classes")
return combining[type(ch) == "number" and u(ch) or ch] or 0
end
end
-- FIXME: Some combining characters have a combining class of 0, so this needs rethinking.
function export.is_combining(ch)
return export.combining_class(ch) ~= 0
end
do
local function dotted_circle(ch)
if export.combining_class(ch) ~= 0 then
return "◌" .. ch
end
end
function export.add_dotted_circle(str)
return (gsub(str, ".[\128-\191]*", dotted_circle))
end
end
local lookup_control = codepoint_lookup(
"control",
function (codepoint, ccc)
return ccc or "assigned"
end,
"assigned")
export.lookup_control = lookup_control
function export.is_assigned(codepoint)
return lookup_control(codepoint) ~= "unassigned"
end
function export.is_printable(codepoint)
local result = lookup_control(codepoint)
return (result == "assigned") or (result == "space-separator"), result
end
function export.is_whitespace(codepoint)
local result = lookup_control(codepoint)
return (result == "space-separator"), result
end
export.lookup_category = codepoint_lookup(
"category",
function (codepoint, category)
return category
end,
"Cn")
export.lookup_script = codepoint_lookup(
"scripts",
function (codepoint, script)
return script
end,
"Zzzz")
function export.get_entry_title(codepoint)
if udata.unsupported_title[codepoint] then
return udata.unsupported_title[codepoint]
end
if lookup_control(codepoint) ~= "assigned" then
return nil
end
return u(codepoint)
end
return export
