koreader/platform/kindle/libkohelper.sh

#!/bin/sh

## A bit of helper functions...
# Check which type of init system we're running on
if [ -d /etc/upstart ]; then
    export INIT_TYPE="upstart"
    # We'll need that for logging
    # shellcheck disable=SC1091
    [ -f /etc/upstart/functions ] && . /etc/upstart/functions
else
    export INIT_TYPE="sysv"
    # We'll need that for logging
    # shellcheck disable=SC1091
    [ -f /etc/rc.d/functions ] && . /etc/rc.d/functions
fi

# Adapted from libkh[5]
FBINK_BIN="/mnt/us/koreader/fbink"

# NOTE: Yeah, the name becomes a bit of a lie now that we're exclusively using FBInk ;p.
eips_print_bottom_centered() {
    # We need at least two args
    if [ $# -lt 2 ]; then
        echo "not enough arguments passed to eips_print_bottom ($# while we need at least 2)"
        return
    fi

    kh_eips_string="${1}"
    kh_eips_y_shift_up="${2}"

    # Unlike eips, we need at least a single space to even try to print something ;).
    if [ "${kh_eips_string}" = "" ]; then
        kh_eips_string=" "
    fi

    # Sleep a tiny bit to workaround the logic in the 'new' (K4+) eInk controllers that tries to bundle updates,
    # otherwise it may drop part of our messages because of other screen updates from KUAL...
    # Unless we really don't want to sleep, for special cases...
    if [ ! -n "${EIPS_NO_SLEEP}" ]; then
        usleep 150000 # 150ms
    fi

    # NOTE: FBInk will handle the padding. FBInk's default font is square, not tall like eips,
    #       so we compensate by tweaking the baseline ;). This matches the baseline we use on Kobo, too.
    ${FBINK_BIN} -qpm -y $((-4 - kh_eips_y_shift_up)) "${kh_eips_string}"
}