I was trying to make the syntax highlighting (with 256 colors) of vim
work inside screen
, which is running inside gterm
.
It works quite fine in the beginning. What I mean by "in the beginning" is, after I start screen
, and enter vim
, the colors look fine, and there are really 256 colors.
But after a while (I don't know exactly how long) the colors automatically change back to an appearance as if there are only 8 (or 16?) colors.
For example, after this has already occurred, if I enter the command
hi Comment ctermfg=68
inside vim
, the comments appear to be "pure" green; however, if I open another vim
outside screen (in the same terminal), then with the same command the comments appear to be a "yellowish" green.
The following is my .screenrc settings related to color:
attrcolor b ".I" defbce "on" termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm' term xterm-256color
After running a python script to display all the colors, I find out that maybe this is a problem of screen itself, and has nothing to do with vim.
What I did is, inside the screen
session with problems, this script gives 256 colors, but many of them are actually the same; however, when I start a new screen session with the same configuration, this script gives 256 colors which are distinct from each other.
Edit:
Last night I connected to my Linux computer (which is in my office and it is always on) with putty
, then opened a screen
session with multiple windows in it. The colors are correct last night. Then before I went to sleep I detached the screen
session and closed putty
.
Now in the morning when I attach that screen
session in putty
again, the colors crash: they appear as if there are only 8 colors.
The colors are fine outside screen
(but still in putty
).
Edit:
Three years later after I asked this question, today I saw a similar problem. The problem is that vim
can display 256 colors outside screen
, and screen
can display 256 colors with a test script, but vim
can't display any color (can only display black and white) inside screen
. Just as a note to myself, here is the .screenrc
file I am using
hardstatus alwayslastline "%{.bW}%-w%{.rW}%n %t%{-}%+w %=%{..G} %H %{..Y} %Y-%m-%d %c" shell "bash" startup_message off vbell off altscreen on attrcolor b ".I" defbce "on" termcapinfo xterm* 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l' termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm' term screen-256color
The solution to the problem is already mentioned in the accepted answer, namely, I need to include
export TERM=xterm-256color
in .bashrc
.
GNU Screen and Tmux That makes screen always claim to its clients that it can display 256 colors.
You can change color schemes at anytime in vi by typing colorscheme followed by a space and the name of the color scheme. For more color schemes, you can browse this library on the vim website. You can enable or disable colors by simply typing "syntax on" or "syntax off" in vi.
View preinstalled color schemes Some color schemes are already installed on your system. You can find those color schemes in the /usr/share/vim/vim*/colors directory as . vim extension.
Setting TERM=xterm-256color by default Change it to xterm-256color , done!
Set TERM
to xterm-256color
in your .bashrc
, and put term screen-256color
in your .screenrc
.
Here's why this breaks: gnome-terminal, screen, tmux, bash, putty and vim have all been written to intelligently handle 256 colors, but you need to set things up correctly at the earliest possible point. Using termcapinfo
in your .screenrc
is actually a duct tape solution!
If your TERM
is set correctly, it will signal to bash that you're in 256-color mode, which means it will play nice with screen being in 256-color mode as well.
So, in your .bashrc
, export TERM=xterm-256color
. [1]
In your .screenrc
, use screen-256color
for TERM
instead of xterm-256color
, and delete the rest of the cruft!
In your PuTTy configuration, use putty-256color
.
You can download the termcap entry files and put them in ~/.terminfo/s
and ~/.terminfo/p
, if your box doesn't have them by default.
Footnotes
[1] Setting TERM
to xterm-256color
in your .bashrc
can be a little presumptuous, especially if you use the same .bashrc
on multiple machines. I have found the following snippet to be fairly effective:
case "$TERM" in *-256color) alias ssh='TERM=${TERM%-256color} ssh' ;; *) POTENTIAL_TERM=${TERM}-256color POTENTIAL_TERMINFO=${TERM:0:1}/$POTENTIAL_TERM # better to check $(toe -a | awk '{print $1}') maybe? BOX_TERMINFO_DIR=/usr/share/terminfo [[ -f $BOX_TERMINFO_DIR/$POTENTIAL_TERMINFO ]] && \ export TERM=$POTENTIAL_TERM HOME_TERMINFO_DIR=$HOME/.terminfo [[ -f $HOME_TERMINFO_DIR/$POTENTIAL_TERMINFO ]] && \ export TERM=$POTENTIAL_TERM ;; esac
The alias
of ssh is a defensive measure to prevent us from trying to open a 256-color terminal on a remote machine that doesn't necessarily support it. The main block is the other half of the equation; it checks to see if the corresponding terminfo entry exists, and sets it if it does.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With