98 lines
3.7 KiB
Lua
98 lines
3.7 KiB
Lua
--
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-- fancy-prompt.lua: the fancy multiline prompt you probably want
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--
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-- Copyright (c) 2016, Přemysl Janouch <p.janouch@gmail.com>
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--
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-- Permission to use, copy, modify, and/or distribute this software for any
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-- purpose with or without fee is hereby granted, provided that the above
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-- copyright notice and this permission notice appear in all copies.
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--
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-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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--
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-- Beware that it is a hack and only goes about 90% of the way, which is why
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-- this functionality is only available as a plugin in the first place
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-- (well, and also for customizability).
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--
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-- The biggest problem is that the way we work with Readline is incompatible
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-- with multiline prompts, and normal newlines just don't work. This is being
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-- circumvented by using an overflowing single-line prompt with a specially
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-- crafted character in the rightmost column that prevents the bar's background
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-- from spilling all over the last line.
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--
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-- There is also a problem with C-r search rendering not clearing out the
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-- background but to really fix that mode, we'd have to fully reimplement it
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-- since its alternative prompt very often gets overriden by accident anyway.
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local prompt = degesch.hook_prompt (function (hook)
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local current = degesch.current_buffer
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local chan = current.channel
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local s = current.server
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local current_n = 0
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local active = ""
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for i, buffer in ipairs (degesch.buffers) do
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if buffer == current then
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current_n = i
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elseif buffer.new_messages_count ~= buffer.new_unimportant_count then
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if active ~= "" then active = active .. "," end
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if buffer.highlighted then active = active .. "!" end
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active = active .. i
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end
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end
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if active ~= "" then active = "(" .. active .. ")" end
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local x = current_n .. ":" .. current.name
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if chan then
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local param = ""
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for mode, param in pairs (chan.param_modes) do
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param = param .. " +" .. mode .. " " .. param
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end
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local modes = chan.no_param_modes .. param:sub (2)
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if modes ~= "" then x = x .. "(+" .. modes .. ")" end
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if chan.users_len ~= 0 then x = x .. "{" .. chan.users_len .. "}" end
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end
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if current.hide_unimportant then x = x .. "<H>" end
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local lines, cols = degesch.get_screen_size ()
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x = x .. " " .. active .. string.rep (" ", cols)
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-- Cut off extra characters and apply formatting, including the hack.
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-- Note that this doesn't count with full-width or zero-width characters.
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local overflow = utf8.offset (x, cols - 1)
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if overflow then x = x:sub (1, overflow) end
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x = "\x01\x1b[0;4;1;38;5;16m\x1b[48;5;255m\x02" ..
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x .. "\x01\x1b[0;4;1;7;38;5;255m\x02 \x01\x1b[0;1m\x02"
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local user_prefix = function (chan, user)
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for i, chan_user in ipairs (chan.users) do
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if chan_user.user == user then return chan_user.prefixes end
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end
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return ""
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end
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if s then
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x = x .. "["
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local state = s.state
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if state == "disconnected" or state == "connecting" then
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x = x .. "(" .. state .. ")"
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elseif state ~= "registered" then
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x = x .. "(unregistered)"
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else
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local user, modes = s.user, s.user_mode
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if chan then x = x .. user_prefix (chan, user) end
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x = x .. user.nickname
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if modes ~= "" then x = x .. "(" .. modes .. ")" end
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end
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x = x .. "] "
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else
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-- There needs to be at least one character so that the cursor
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-- doesn't get damaged by our hack in that last column
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x = x .. "> "
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end
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return x
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end)
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