Due to go std lib uses poller for os.File introducing in this commit:
c05b06a12d
There are two changes to watch out:
1. os.File.Fd will always return a blocking fd except on bsd.
2. os.File.Read won't return EAGAIN error for nonblocking fd.
So
For 1, we just get tty's fd in advance and then set its block mode.
For 2, we use read syscall directly to get what we wanted error(EAGAIN).
Fix issue #910.
Signed-off-by: Tw <tw19881113@gmail.com>
Do not automatically decide to use alternate screen when the value of
height exceeds the height of the terminal.
# Use alternate screen
fzf
fzf --height 100%
fzf --no-height
# Still use current screen
fzf --height 10000
- Move cursor to the top-left corner when starting a command in
alternate screen
- Fix cursor position when returning to alternate screen when fzf is
running in full screen mode
Excerpt from http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/x361.html:
> - Save cursor position:
> \033[s
> - Restore cursor position:
> \033[u
>
> The latter two codes are NOT honoured by many terminal emulators. The
> only ones that I'm aware of that do are xterm and nxterm - even though
> the majority of terminal emulators are based on xterm code. As far as
> I can tell, rxvt, kvt, xiterm, and Eterm do not support them. They are
> supported on the console.
They are also unsupported by Neovim terminal.
