.zsh/functions/precmd

   1 # -*- mode:sh -*-
   2
   3 # update VCS information
   4 # is439 && vcs_info
   5
   6 # set variable debian_chroot if running in a chroot with /etc/debian_chroot
   7 if [[ -z "$debian_chroot" ]] && [[ -r /etc/debian_chroot ]] ; then
   8     debian_chroot="chroot: $(cat /etc/debian_chroot)"
   9 fi
  10 ###
  11
  12 if ! is437; then
  13     local TERMWIDTH
  14     (( TERMWIDTH = ${COLUMNS} - 1 ))
  15
  16     # Truncate the path if it's too long.
  17     PR_FILLBAR=""
  18     PR_PWDLEN=""
  19
  20     local promptsize=${#${(%):---(%n@%m:%l)---()--}}
  21     local pwdsize=${#${(%):-%~}}
  22     # for whatever reason this works better if set to 3 on systems where no acpi info is in prompt
  23     local apmsize=3
  24
  25     # Finally see how long the acpi related prompt is
  26     PR_APM_TEMP=${PR_APM//\${\(e\)PR_SLASH}/#}
  27     PR_APM_LENGTH=${(e)PR_APM_TEMP//\${PR_(LIGHT|)(RED|GREEN|YELLOW|BLUE|MAGENTA|CYAN|WHITE)}/}
  28
  29     # The info i collect for my laptop is - well. long. As I usually have my terms in full screen
  30     # mode that doesnt matter, there is enough space. But for some cases I may want smaller
  31     # windows, so deal with it and make the acpi line smaller by dropping parts of it.
  32
  33     (( apmsize=${(e)#PR_APM_LENGTH} - 2 ))
  34
  35     while [[ "$promptsize + $pwdsize + $apmsize" -gt $TERMWIDTH ]]; do
  36         (( TOOLONG=$TOOLONG + 1 ))
  37
  38         if [[ "$TOOLONG" -gt 5 ]]; then
  39                 break
  40         fi
  41         periodic
  42         (( apmsize=${(e)#PR_APM_LENGTH} - 2 ))
  43     done
  44
  45     if [[ ${(e)#PR_APM_LENGTH} -gt 10 ]]; then
  46         (( apmsize=${(e)#PR_APM_LENGTH} - 2 ))
  47     else
  48         apmsize=3
  49     fi
  50
  51     if [[ "$promptsize + $pwdsize + $apmsize" -gt $TERMWIDTH ]]; then
  52         ((PR_PWDLEN=$TERMWIDTH - $promptsize - $apmsize ))
  53     else
  54         PR_FILLBAR="\${(l.(($TERMWIDTH - ($promptsize + $pwdsize + $apmsize)))..${PR_HBAR}.)}"
  55     fi
  56
  57     if [[ "$PR_BARLENGTH" -lt "${#${(e)PR_FILLBAR}}" ]]; then
  58         (( TOOLONG=$TOOLONG - 1 ))
  59         if [[ "$TOOLONG" -lt 0 ]]; then
  60                 TOOLONG=0
  61         fi
  62     fi
  63     PR_BARLENGTH=${#${(e)PR_FILLBAR}}
  64 fi