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koreader/platform/kindle/libkohelper.sh

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#!/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}"
}