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xC: make fancy-prompt.lua alignment more reliable

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And generally clean up that script.
This commit is contained in:
Přemysl Eric Janouch
2022-08-27 08:55:44 +02:00
parent 83764d1e1b
commit f7be510d26
2 changed files with 52 additions and 17 deletions
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36
plugins/xC/fancy-prompt.lua
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@@ -1,7 +1,7 @@
--
-- fancy-prompt.lua: the fancy multiline prompt you probably want
--
-- Copyright (c) 2016, Přemysl Eric Janouch <p@janouch.name>
-- Copyright (c) 2016 - 2022, Přemysl Eric Janouch <p@janouch.name>
--
-- Permission to use, copy, modify, and/or distribute this software for any
-- purpose with or without fee is hereby granted.
@@ -40,7 +40,7 @@ xC.hook_prompt (function (hook)
if buffer == current then
current_n = i
elseif buffer.new_messages_count ~= buffer.new_unimportant_count then
if active ~= "" then active = active .. "," end
active = active .. ","
if buffer.highlighted then
active = active .. "!"
bg_color = "224"
@@ -48,7 +48,6 @@ xC.hook_prompt (function (hook)
active = active .. i
end
end
if active ~= "" then active = "(" .. active .. ")" end
local x = current_n .. ":" .. current.name
if chan and chan.users_len ~= 0 then
local params = ""
@@ -56,25 +55,34 @@ xC.hook_prompt (function (hook)
params = params .. " +" .. mode .. " " .. param
end
local modes = chan.no_param_modes .. params:sub (3)
if modes ~= "" then x = x .. "(+" .. modes .. ")" end
if modes ~= "" then
x = x .. "(+" .. modes .. ")"
end
x = x .. "{" .. chan.users_len .. "}"
end
if current.hide_unimportant then x = x .. "<H>" end
local lines, cols = xC.get_screen_size ()
x = x .. " " .. active .. string.rep (" ", cols)
if current.hide_unimportant then
x = x .. "<H>"
end
if active ~= "" then
x = x .. " (" .. active:sub (2) .. ")"
end
-- Readline 7.0.003 seems to be broken and completely corrupts the prompt.
-- However 8.0.004 seems to be fine with these, as is libedit 20191231-3.1.
--x = x:gsub("[\128-\255]", "?")
-- Cut off extra characters and apply formatting, including the hack.
-- FIXME: this doesn't count with full-width or zero-width characters.
-- We might want to export wcwidth() above term_from_utf8 somehow.
local overflow = utf8.offset (x, cols - 1)
if overflow then x = x:sub (1, overflow) end
-- Align to the terminal's width and apply formatting, including the hack.
local lines, cols = xC.get_screen_size ()
local trailing, width = " ", xC.measure (x)
while cols > 0 and width >= cols do
x = x:sub (1, utf8.offset (x, -1) - 1)
trailing, width = ">", xC.measure (x)
end
x = "\x01\x1b[0;4;1;38;5;16m\x1b[48;5;" .. bg_color .. "m\x02" ..
x .. "\x01\x1b[0;4;1;7;38;5;" .. bg_color .. "m\x02 \x01\x1b[0;1m\x02"
x .. string.rep (" ", cols - width - 1) ..
"\x01\x1b[0;4;1;7;38;5;" .. bg_color .. "m\x02" ..
trailing .. "\x01\x1b[0;1m\x02"
local user_prefix = function (chan, user)
for i, chan_user in ipairs (chan.users) do