diff options
Diffstat (limited to 'lua/colorizer/utils.lua')
-rw-r--r-- | lua/colorizer/utils.lua | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/lua/colorizer/utils.lua b/lua/colorizer/utils.lua index bfffb60..9dad9d8 100644 --- a/lua/colorizer/utils.lua +++ b/lua/colorizer/utils.lua @@ -3,6 +3,8 @@ local bit, ffi = require "bit", require "ffi" local band, bor, rshift, lshift = bit.band, bit.bor, bit.rshift, bit.lshift +local uv = vim.loop + -- -- TODO use rgb as the return value from the matcher functions -- -- instead of the rgb_hex. Can be the highlight key as well -- -- when you shift it left 8 bits. Use the lower 8 bits for @@ -101,6 +103,68 @@ local function percent_or_hex(v) return x end +--- Get last modified time of a file +---@param path string: file path +---@return number|nil: modified time +local function get_last_modified(path) + local fd = uv.fs_open(path, "r", 438) + if not fd then + return + end + + local stat = uv.fs_fstat(fd) + uv.fs_close(fd) + if stat then + return stat.mtime.nsec + else + return + end +end + +--- Watch a file for changes and execute callback +---@param path string: File path +---@param callback function: Callback to execute +---@param ... array: params for callback +---@return function|nil +local function watch_file(path, callback, ...) + if not path or type(callback) ~= "function" then + return + end + + local fullpath = uv.fs_realpath(path) + if not fullpath then + return + end + + local start + local args = { ... } + + local handle = uv.new_fs_event() + local function on_change(err, filename, _) + -- Do work... + callback(filename, unpack(args)) + -- Debounce: stop/start. + handle:stop() + if not err or not get_last_modified(filename) then + start() + end + end + + function start() + uv.fs_event_start( + handle, + fullpath, + {}, + vim.schedule_wrap(function(...) + on_change(...) + end) + ) + end + + start() + return handle +end + --- @export return { byte_is_alphanumeric = byte_is_alphanumeric, @@ -108,4 +172,6 @@ return { merge = merge, parse_hex = parse_hex, percent_or_hex = percent_or_hex, + get_last_modified = get_last_modified, + watch_file = watch_file, } |