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local names_file = arg[1]
local hashy = require('gen.hashy')
local keycodes = require('nvim.keycodes')
local keycode_names = keycodes.names
--- @type table<string,integer>
--- Maps lower-case key names to their original indexes.
local name_orig_idx = {}
--- @type table<string,integer>
--- Maps keys to the original indexes of their preferred names.
local key_orig_idx = {}
--- @type [string, string][]
--- When multiple keys have the same name (e.g. TAB and K_TAB), only the first one
--- is added to the two tables above, and the other keys are added here.
local extra_keys = {}
for i, keycode in ipairs(keycode_names) do
local key = keycode[1]
local name = keycode[2]
local name_lower = name:lower()
if name_orig_idx[name_lower] == nil then
name_orig_idx[name_lower] = i
if key_orig_idx[key] == nil then
key_orig_idx[key] = i
end
else
table.insert(extra_keys, keycode)
end
end
local hashorder = vim.tbl_keys(name_orig_idx)
table.sort(hashorder)
local hashfun
hashorder, hashfun = hashy.hashy_hash('get_special_key_code', hashorder, function(idx)
return 'key_names_table[' .. idx .. '].name.data'
end, true)
--- @type table<string,integer>
--- Maps keys to the (after hash) indexes of the entries with preferred names.
local key_hash_idx = {}
for i, lower_name in ipairs(hashorder) do
local orig_idx = name_orig_idx[lower_name]
local key = keycode_names[orig_idx][1]
if key_orig_idx[key] == orig_idx then
key_hash_idx[key] = i
end
end
local names_tgt = assert(io.open(names_file, 'w'))
names_tgt:write([[
static const struct key_name_entry {
int key; ///< Special key code or ascii value
String name; ///< Name of key
const String *pref_name; ///< Pointer to preferred key name
///< (may be NULL or point to the name in another entry)
} key_names_table[] = {]])
for i, lower_name in ipairs(hashorder) do
local keycode = keycode_names[name_orig_idx[lower_name]]
local key = keycode[1]
local name = keycode[2]
local pref_idx = key_hash_idx[key]
names_tgt:write(
('\n {%s, {"%s", %u}, %s},'):format(
key,
name,
#name,
pref_idx == i and 'NULL' or ('&key_names_table[%u].name'):format(pref_idx - 1)
)
)
end
for _, keycode in ipairs(extra_keys) do
local key = keycode[1]
local name = keycode[2]
names_tgt:write(('\n {%s, {"%s", %u}, NULL},'):format(key, name, #name))
end
names_tgt:write('\n};\n\n')
names_tgt:write('static ' .. hashfun)
names_tgt:close()
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