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# tty layer as opposed to a future window management server bullshit thingy
# this is just tty0 it adds nice shit like ^B and stuff
# also has history and shit
global tty = {
line = "", cursor = 0, esc = 0,
history = {}, hist_index = 0,
back = fn(self, n) do
let i = 0
while i < n do puts("\x08") i += 1 end
end,
blanks = fn(self, n) do
let i = 0
while i < n do puts(" ") i += 1 end
end,
insert = fn(self, ch) do
const pre = self.line[0..self.cursor]
const post = self.line[self.cursor..]
self.line = pre ~ ch ~ post
puts(ch ~ post)
self:back(post:len())
self.cursor += 1
end,
backspace = fn(self) do
if self.cursor == 0 return :nil
const pre = self.line[0..(self.cursor - 1)]
const post = self.line[self.cursor..]
self.line = pre ~ post
self.cursor -= 1
puts("\x08")
puts(post ~ " ")
self:back(post:len() + 1)
end,
move_left = fn(self) do
if self.cursor > 0 do puts("\x08") self.cursor -= 1 end
end,
move_right = fn(self) do
if self.cursor < self.line:len() do puts(self.line[self.cursor]) self.cursor += 1 end
end,
home = fn(self) do
self:back(self.cursor)
self.cursor = 0
end,
to_end = fn(self) do
puts(self.line[self.cursor..])
self.cursor = self.line:len()
end,
kill = fn(self) do
self:back(self.cursor)
self:blanks(self.line:len())
self:back(self.line:len())
self.line = ""
self.cursor = 0
end,
erase_word = fn(self) do
if self.cursor == 0 return :nil
let at = self.cursor
while (at > 0 and self.line[at - 1] == " ") do at -= 1 end
while (at > 0 and self.line[at - 1] != " ") do at -= 1 end
let count = self.cursor - at
while count > 0 do self:backspace() count -= 1 end
end,
replace_line = fn(self, text) do
self:kill()
self.line = text
puts(text)
self.cursor = text:len()
end,
history_prev = fn(self) do
if self.history:len() == 0 return :nil
if self.hist_index > 0 do self.hist_index -= 1 end
self:replace_line(self.history[self.hist_index])
end,
history_next = fn(self) do
if self.history:len() == 0 return :nil
if self.hist_index < self.history:len() - 1 do
self.hist_index += 1
self:replace_line(self.history[self.hist_index])
end
else do
self.hist_index = self.history:len()
self:replace_line("")
end
end,
submit = fn(self) do
puts("\n")
const entered = self.line
if entered:len() > 0 do self.history:push(entered) end
self.hist_index = self.history:len()
self.line = ""
self.cursor = 0
run(entered)
end,
cancel = fn(self) do
puts("^C\n")
self.line = ""
self.cursor = 0
self.hist_index = self.history:len()
puts(prompt())
end,
clear_screen = fn(self) do
console:clear()
puts(prompt())
puts(self.line)
self:back(self.line:len() - self.cursor)
end,
feed = fn(self, byte) do
if stdin_deliver(byte) return :nil
if self.esc == 1 do
if byte == 91 do self.esc = 2 end
else do self.esc = 0 end
return :nil
end
if self.esc == 2 do
self.esc = 0
if byte == 65 do self:history_prev() end # up
else if byte == 66 do self:history_next() end # down
else if byte == 67 do self:move_right() end # right
else if byte == 68 do self:move_left() end # left
else if byte == 72 do self:home() end # home
else if byte == 70 do self:to_end() end # end
return :nil
end
if byte == 27 do self.esc = 1 return :nil end # ESC, start a sequence
if byte == 10 do self:submit() return :nil end # enter
if byte == 8 or byte == 127 do self:backspace() return :nil end # bs / del
if byte == 1 do self:home() return :nil end # ctrl-a
if byte == 5 do self:to_end() return :nil end # ctrl-e
if byte == 3 do self:cancel() return :nil end # ctrl-c
if byte == 12 do self:clear_screen() return :nil end # ctrl-l
if byte == 21 do self:kill() return :nil end # ctrl-u
if byte == 23 do self:erase_word() return :nil end # ctrl-w
if byte < 32 return :nil # ctrl-d and other ctrls: ignore
if byte > 126 return :nil
self:insert(string.of_ascii(byte))
end,
}
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