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local utils = {}
utils.if_nil = function(x, was_nil, was_not_nil)
if x == nil then
return was_nil
else
return was_not_nil
end
end
utils.get_default = function(x, default)
return utils.if_nil(x, default, x)
end
utils.get_lazy_default = function(x, defaulter, ...)
if x == nil then
return defaulter(...)
else
return x
end
end
local function reversedipairsiter(t, i)
i = i - 1
if i ~= 0 then
return i, t[i]
end
end
utils.reversed_ipairs = function(t)
return reversedipairsiter, t, #t + 1
end
utils.default_table_mt = {
__index = function(t, k)
local obj = {}
rawset(t, k, obj)
return obj
end
}
utils.repeated_table = function(n, val)
local empty_lines = {}
for _ = 1, n do
table.insert(empty_lines, val)
end
return empty_lines
end
utils.quickfix_items_to_entries = function(locations)
local results = {}
for _, entry in ipairs(locations) do
local vimgrep_str = entry.vimgrep_str or string.format(
"%s:%s:%s: %s",
vim.fn.fnamemodify(entry.display_filename or entry.filename, ":."),
entry.lnum,
entry.col,
entry.text
)
table.insert(results, {
valid = true,
value = entry,
ordinal = vimgrep_str,
display = vimgrep_str,
start = entry.start,
finish = entry.finish,
})
end
return results
end
utils.new_ngram = function()
return require("telescope._private.NGram"):new()
end
-- TODO: Figure out how to do this... could include in plenary :)
-- NOTE: Don't use this yet. It will segfault sometimes.
--
-- opts.shorten_path and function(value)
-- local result = {
-- valid = true,
-- display = utils.path_shorten(value),
-- ordinal = value,
-- value = value
-- }
-- return result
-- end or nil)
utils.path_shorten = (function()
if jit then
local ffi = require('ffi')
ffi.cdef [[
typedef unsigned char char_u;
char_u *shorten_dir(char_u *str);
]]
return function(path)
if not path then
return path
end
local c_str = ffi.new("char[?]", #path + 1)
ffi.copy(c_str, path)
return ffi.string(ffi.C.shorten_dir(c_str))
end
else
return function(path)
return path
end
end
end)()
-- local x = utils.make_default_callable(function(opts)
-- return function()
-- print(opts.example, opts.another)
-- end
-- end, { example = 7, another = 5 })
-- x()
-- x.new { example = 3 }()
function utils.make_default_callable(f, default_opts)
return setmetatable({
new = function(opts)
opts = vim.tbl_extend("keep", opts, default_opts)
return f(opts)
end,
}, {
__call = function()
local ok, err = pcall(f(default_opts))
if not ok then
error(debug.traceback(err))
end
end
})
end
return utils
|
