X-Git-Url: https://feistymeow.org/gitweb/?a=blobdiff_plain;f=scripts%2Ftty%2Fterminal_titler.sh;h=a4e6a3fca9c711bd1d7c5458efd8ba9e59a11fa1;hb=ec0607714e0846cbf25687be2c915eb28b521f4c;hp=3c01d611faf1bd5ab430e4a7896de45e828ec34c;hpb=f9a2a21830b0ea5f803c17cae56573a6b18e43db;p=feisty_meow.git diff --git a/scripts/tty/terminal_titler.sh b/scripts/tty/terminal_titler.sh index 3c01d611..a4e6a3fc 100644 --- a/scripts/tty/terminal_titler.sh +++ b/scripts/tty/terminal_titler.sh @@ -1,65 +1,94 @@ #!/bin/bash -source $FEISTY_MEOW_SCRIPTS/core/functions.sh - -# just saying this is an array... -declare -a PRIOR_TERMINAL_TITLES -# set the stack position if not already set. -if [ -z "$PTT_STACK_INDEX" ]; then - # this variable records where we will push new items on the stack. - PTT_STACK_INDEX=0 -fi - -# adds an entry into the stack of terminal titles. -function push_ptt_stack() -{ - PRIOR_TERMINAL_TITLES[$PTT_STACK_INDEX]="$*" -echo now list has: -echo ${PRIOR_TERMINAL_TITLES[@]} - ((PTT_STACK_INDEX++)) -echo stack index incremented and now at $PTT_STACK_INDEX -} +source "$FEISTY_MEOW_SCRIPTS/core/functions.sh" +source "$FEISTY_MEOW_SCRIPTS/core/common.alias" -function pop_ptt_stack() -{ - if [ $PTT_STACK_INDEX -le 0 ]; then - echo nothing to pop from prior terminal titles stack. - else - ((PTT_STACK_INDEX--)) -echo stack index decremented and now at $PTT_STACK_INDEX - CURRENT_TERM_TITLE="${PRIOR_TERMINAL_TITLES[$PTT_STACK_INDEX]}" - fi -} +# uncomment this to get extra noisy debugging. +#export DEBUG_TERM_TITLE=true -# returns okay (0) if the stack is empty, or non-zero if not empty. -function ptt_stack_empty() -{ - test $PTT_STACK_INDEX -le 0 -} +############## # puts a specific textual label on the terminal title bar. # this doesn't consider any previous titles; it just labels the terminal. # the title may not be visible in some window managers. -function set_terminal_title() +function apply_title_to_terminal() { title="$*" # if we weren't given a title, then use just the hostname. this is the degraded functionality. if [ -z "${title}" ]; then title="$(hostname)" fi - echo -n -e "\033]0;${title}\007" + + if [ "${TERM}" != "dumb" -a -z "$PBS_ENVIRONMENT" -a \ + ! -z "$PS1" -a "${TERM}" != "linux" ]; then + echo -n -e "\033]0;${title}\007" + else + # not running interactively, so just echo the title. + sep + echo "${title}" + sep + fi } -# reads the current terminal title, if possible, and saves it to our stack of titles. +############## + +# records the current terminal title, pushing it down on the stack of titles, +# possibly prior to a new one being used. function save_terminal_title() { - # save the former terminal title if we're running in X with xterm. - which xprop &>/dev/null - if [ $? -eq 0 ]; then - if [[ "$TERM" =~ .*"xterm".* ]]; then - local prior_title="$(xprop -id $WINDOWID | perl -nle 'print $1 if /^WM_NAME.+= \"(.*)\"$/')" -echo "saving prior terminal title as '$prior_title'" - push_ptt_stack "$prior_title" + local title="$*" + + if [ -z "$title" ]; then + if [ ! -z "$DEBUG_TERM_TITLE" ]; then + echo "terminal_titler: empty title: pushing current title again" + fi + peek_title_stack + title="$LAST_TITLE" + if [ -z "$title" ]; then + log_feisty_meow_event "terminal_titler: there was no saved title, so we're ignoring the save attempt." + return 1 + fi + fi + +#hmmm: need a validation step here to remove bad chars that conflict with our title compression scheme. + + # only slap a comma after the existing value if it wasn't empty. + if [ -z "$TERMINAL_TITLE_STACK" ]; then + export TERMINAL_TITLE_STACK="\"$title\"" + else + export TERMINAL_TITLE_STACK="$TERMINAL_TITLE_STACK,\"$title\"" + fi + + if [ ! -z "$DEBUG_TERM_TITLE" ]; then + echo "terminal_titler: new terminal title stack is:" + echo "$TERMINAL_TITLE_STACK" + fi +} + +# takes a terminal title off the stack and sets the LAST_TITLE variable. +function pop_title_stack() +{ + # whack our output variable, just in case. + unset LAST_TITLE + # get our stack top. + peek_title_stack + # trim the popped item out of the stack. + if [ ! -z "$TERMINAL_TITLE_STACK" ]; then + TERMINAL_TITLE_STACK="$(echo $TERMINAL_TITLE_STACK | sed -n -e 's/\(.*\),[^,]*$/\1/p')" + fi +} + +# like pop, but does not change the stack, effectively handing you the most +# recently set title. +function peek_title_stack() +{ + # whack our output variable, just in case. + unset LAST_TITLE + + if [ ! -z "$TERMINAL_TITLE_STACK" ]; then + LAST_TITLE="$(echo $TERMINAL_TITLE_STACK | sed -n -e 's/.*","\([^,]*\)"$/\1/p')" + if [ -z "$LAST_TITLE" ]; then + LAST_TITLE="$(echo $TERMINAL_TITLE_STACK | sed -n -e 's/"//gp')" fi fi } @@ -67,17 +96,15 @@ echo "saving prior terminal title as '$prior_title'" # using our stored terminal title, this replaces the title on the terminal. function restore_terminal_title() { -# we don't want to emit anything extra if this is being driven by git. -#hmmm... this could be a problem? -# if [ -z "$(echo $* | grep git)" ]; then - # run the terminal labeller to restore the prior title, if there was one. - if ptt_stack_empty; then -echo prior titles were empty, so doing nothing. - else - pop_ptt_stack -echo "restoring prior terminal title of '$CURRENT_TERM_TITLE'" - set_terminal_title "$CURRENT_TERM_TITLE" + pop_title_stack + + if [ ! -z "$LAST_TITLE" ]; then + if [ ! -z "$DEBUG_TERM_TITLE" ]; then + echo "terminal_titler: restoring prior terminal title of '$LAST_TITLE'" + echo "terminal_titler: while new title stack is: $TERMINAL_TITLE_STACK" + fi + apply_title_to_terminal "$LAST_TITLE" fi } @@ -85,21 +112,36 @@ echo "restoring prior terminal title of '$CURRENT_TERM_TITLE'" function label_terminal_with_info() { # we only label the terminal anew if there's no saved title. -# if [ -z "$PRIOR_TERMINAL_TITLE" ]; then - if ptt_stack_empty; then + if [ -z "$TERMINAL_TITLE_STACK" ]; then + if [ ! -z "$DEBUG_TERM_TITLE" ]; then + echo "terminal_titler: showing new generated title since prior title was empty" + fi pruned_host=$(echo $HOSTNAME | sed -e 's/^\([^\.]*\)\..*$/\1/') date_string=$(date +"%Y %b %e @ %T") - user=$USER + user="$(fm_username)" if [ -z "$user" ]; then # try snagging the windoze name. user=$USERNAME fi new_title="-- $user@$pruned_host -- [$date_string]" - set_terminal_title "$new_title" + apply_title_to_terminal "$new_title" + save_terminal_title "$new_title" else - # restore the former title. - restore_terminal_title + # use the former title; paste it back up there just in case. + peek_title_stack + apply_title_to_terminal "$LAST_TITLE" fi } +############## + +# user friendly version sets the terminal title and saves the title being added. +function set_terminal_title() +{ + apply_title_to_terminal $* + save_terminal_title $* +} + +############## +