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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,
fn back(self, n) do
let i = 0
while (i < n) do
puts("\x08")
i += 1
end
end,
fn blanks(self, n) do
let i = 0
while (i < n) do
puts(" ")
i += 1
end
end,
fn insert(self, character) do
const pre = self.line[0..self.cursor]
const post = self.line[self.cursor..]
self.line = pre ~ character ~ post
puts(character ~ post)
self:back(post:len())
self.cursor += 1
end,
fn backspace(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,
fn move_left(self) do
if self.cursor > 0 do
puts("\x08")
self.cursor -= 1
end
end,
fn move_right(self) do
if self.cursor < self.line:len() do
puts(self.line[self.cursor])
self.cursor += 1
end
end,
fn home(self) do
self:back(self.cursor)
self.cursor = 0
end,
fn to_end(self) do
puts(self.line[self.cursor..])
self.cursor = self.line:len()
end,
fn kill(self) do
self:back(self.cursor)
self:blanks(self.line:len())
self:back(self.line:len())
self.line = ""
self.cursor = 0
end,
fn erase_word(self) do
if (self.cursor == 0)
return :nil
let at = self.cursor
while (at > 0 and self.line[at - 1] == " ")
at -= 1
while (at > 0 and self.line[at - 1] != " ")
at -= 1
let count = self.cursor - at
while (count > 0) do
self:backspace()
count -= 1
end
end,
fn replace_line(self, text) do
self:kill()
self.line = text
puts(text)
self.cursor = text:len()
end,
fn history_prev(self) do
if (self.history:len() == 0)
return :nil
if (self.hist_index > 0)
self.hist_index -= 1
self:replace_line(self.history[self.hist_index])
end,
fn history_next(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,
fn submit(self) do
puts("\n")
const entered = self.line
if (entered:len() > 0)
self.history:push(entered)
self.hist_index = self.history:len()
self.line = ""
self.cursor = 0
run(entered)
end,
fn cancel(self) do
puts("^C\n")
self.line = ""
self.cursor = 0
self.hist_index = self.history:len()
puts(prompt())
end,
fn clear_screen(self) do
console:clear()
puts(prompt())
puts(self.line)
self:back(self.line:len() - self.cursor)
end,
fn feed(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
match byte
| 65 => self:history_prev() # up
| 66 => self:history_next() # down
| 67 => self:move_right() # right
| 68 => self:move_left() # left
| 72 => self:home() # home
| 70 => self:to_end() # end
| _ => :nil
return :nil
end
# ESC, start a sequence
if byte == 27 do
self.esc = 1
return :nil
end
match byte
| 10 => self:submit() # enter
| 8 => self:backspace() # bs
| 127 => self:erase_word() # del (ctrl-bs)
| 1 => self:home() # ctrl-a
| 5 => self:to_end() # ctrl-e
| 3 => self:cancel() # ctrl-c
| 12 => self:clear_screen() # ctrl-l
| 21 => self:kill() # ctrl-u
| 23 => self:erase_word() # ctrl-w
| _ => do
# ctrl-d and other shits
if (byte < 32)
return :nil
if (byte > 126)
return :nil
self:insert(string.of_ascii(byte))
end
end,
}
|
