dotfiles/screen/screenrc

# For a complete list of available commands, see http://bit.ly/jLtj

# Set the default program for new windows.
shell                 zsh

# Set default lines of scrollback.
defscrollback         5000            # default: 100

# Detach session on hangup instead of terminating screen completely.
autodetach            on              # default: on

# Select line break behavior for copying.
crlf                  off             # default: off

# Select default utmp logging behavior.
#deflogin              off             # default: on

# If set to 'on', screen will append to the 'hardcopy.n' files created by the
# command hardcopy; otherwise, these files are overwritten each time.
hardcopy_append       on              # default: off

# Set message displayed on pow_detach (when HUP is sent to screen's parent
# process).
pow_detach_msg        "BYE"

# Default timeout to trigger an inactivity notify.
silencewait           30              # default: 30

# Change text highlighting. See http://bit.ly/11RDGZ
sorendition           gK

# Do NOT display copyright notice on startup.
startup_message       off             # default: on

# Set $TERM for new windows. I have more luck with 'linux' than Terminal's
# default 'xterm-color' (^H problems). Comment out to use the default.
term                  linux

# Tweak termcap, terminfo, and termcapinfo  entries for best performance.
termcap               linux           'AF=\E[3%dm:AB=\E[4%dm'
termcap               xterm*          'AF=\E[3%dm:AB=\E[4%dm'
terminfo              linux           'AF=\E[3%p1%dm:AB=\E[4%p1%dm'
terminfo              xterm*          'AF=\E[3%p1%dm:AB=\E[4%p1%dm'

# Allow xterm / Terminal scrollbars to access the scrollback buffer. This
# enables the behavior you'd expect, instead of losing the content that scrolls
# out of the window.
termcapinfo           linux           ti@:te@
termcapinfo           xterm*          ti@:te@

# Use visual bell instead of audio bell.
vbell                 off              # default: ???

# Message to be displayed when the visual bell is triggered.
#vbell_msg             " *beep* "

# Get rid of screen 0
# http://www.linuxquestions.org/questions/linux-software-2/gnu-screen-start-window-numbering-at-1-keep-window-number-0-from-ever-being-used-772580/
bind c screen 1
bind 0 select 10

##################################
# Captions
#
# Control the display of the window captions.
# Without the `always` option, captions will only show when there are multiple
# windows.
#
# String Escapes, especially some Hard-to-Discover escapes, are described below.
# For an age-old tool, screen documentation is not great.
#
# Great thanks to:
# http://blog.quixey.com/2011/07/29/make-your-life-easier-with-gnu-screen/
# http://aperiodic.net/screen/man:string_escapes
# http://superuser.com/questions/212392/how-to-include-screens-session-name-in-hardstatus
# http://superuser.com/questions/209585/adding-conditional-formatting-to-the-status-line-in-gnu-screen
#
# %{= kw} - clear existing format, set color to black/white background/foreground
# %= - pad line with spaces to fill display width. In this case, centering can be
#      done by having `%=` on both the left and and right, as screen will
#      automatically make both paddings the same length. 
#      More spacing and padding can be seen here:
#
#      http://aperiodic.net/screen/truncation_padding_escapes
#
#      I did not bother reading it.
#
# %-w - show windows smaller in number than the current
# %+w - show windows greater in number than the current
#
#       --- Note about the `L` flag ---
#       This was hard to catch in the docs.
#       Some screen escapes can be prefixed with 'L'.
#       For `%-Lw`, window flags are added to the window names,
#       For `%LD` and `%LM`, longer name are used
#
# %{+b} - add the bold attribute to the text
# %n - window number
# %t - window title
# %f - window flags (for various states)
# %?...%? - IF statement. Contents will only display if any ESCAPES produce at
#           least one char So, if `%f` resolves to nothing (i.e. there are no
#           other flags for this window), then nothing will be displayed.
#
#           There is also an else, using `%:`, but I don't know how to use that.
#
caption               always          "%{= kw} %=%-Lw%{g}[%n* %t%? %f%?]%{= kw}%+Lw%="


##################################
# Hardstatus Line
#
# Configure the use and emulation of the terminal's hardstatus line.
# `lastline` will reserve the last line of the display for the hardstatus.
# Prepending the word 'always' will force screen to use the type even if the
# terminal supports a hardstatus line.
#
# Explanation of escapes
#
# %{k.} - change the background color. The `.` in place of the foreground
#         leaves the colour unchanged.
#         `%{.r}` would be redundant: single colours specified without other
#         modifiers are assumed to be foreground colour changes.
#
#         Notice a space after this formatting - this is to force the following
#         padding escape to take the formatting. Otherwise, formatting will only
#         start from the next displayed character (the 'H' in 'Host:').
#
# %{+b r} - add bold, foreground red.
# %{-} - special formatting escape saying, revert the last change to formatting
#        (in the first case, the adding of bold and red foreground)
# %{y} - yellow foreground
# %{m} - magenta foreground
# %{b} - blue foreground
# %H - Hostname
# %1` - run `backtick` command with id = 1 (refer to below)
# %u - other users in this window (surrounded by brackets)
# %c - 24hr time
# %LD - Long Day name (refer to L note above)
# %d - day number
# %m - month number
# %Y - full year number
#
hardstatus            alwayslastline  "%{k.}%{y}Session: %{-}%{+b r}%?[%1`]%:[NoName]%? %{-}on %H%=%?%{-}Users: (%u)%?%=%{b}%c, %LD, %d.%m.%Y"
msgwait               15


##################################
# Backtick Commands
#
# Commands to call using the %` substitutions (e.g. in hardstatus line)
# Potentially Very Powerful!
# Note that any commands in backtick are expected to return only ONE line of
# output (no idea what happens if there's more than that).
#
# Syntax:
#     backtick id lifespan autorefresh command [args...]
#
# id - number to use in substitution e.g. %2` would call backtick with id = 2
#      id = 0 is called simply with %`
# lifespan - seconds to run command again
# autorefresh - seconds to refresh caption and hardstatus text
#
# if both lifespan and autorefresh are 0, it is expected the command will
# periodically produce a line of output. Once output is detected, hardstatus and
# captions will refresh if necessary e.g. if command is a `tail -F`

# get the sessionname that has been set by `C-a :sessionname` or by
# `screen -S [name]`
#
backtick 1 30 30 sh -c 'screen -ls | grep --color=no -o "$PPID\.[^[:space:]]*" | sed s/$PPID\.// | sed s/ttys.*// | sed s/pts-.*//'


##################################
# Default Windows
#
# In theory, you could use `chdir` before a `screen -t` to automate the changing
# of directories, but I have found this troublesome if you just want screen for
# other purposes (like performing Ubuntu release upgrades).
#
# Is there a way of toggling default windows on/off based on how we start
# screen?
#
screen -t "home" 1