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#!/bin/bash
# IMPORTANT:
# To make this block work, you have to edit your block-command.
# It should point to this file. For best performance, only use it on blocks
# which are wide and that you need to scroll.
#
# Example:
# command=~/.i3-blocks/blocks/scroll $BLOCK_NAME
# markup=pango
# interval=repeat
PROG="${1}"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
BLOCK_PATH="${SCRIPT_DIR}/${PROG}"
INTERVAL=0.17
MAX_LENGTH=25
ADD_STR=" | "
ADD_LENGTH=${#ADD_STR}
if [[ -f "${BLOCK_PATH}" ]]; then
BLOCK_OUT=$(bash "${BLOCK_PATH}")
OUT_TEXT=$(echo "${BLOCK_OUT}" | tail -n 1)
elif [[ "${PROG}" != "" ]]; then
OUT_TEXT=$(${PROG})
if [[ $? -ne 0 ]]; then
sleep 1
echo "${PROG}"
echo "${PROG}"
exit 33
fi
fi
if [[ "${OUT_TEXT}" ]]; then
CHECK_SUM=$(echo "${PROG}-${BLOCK_INSTANCE}" | md5sum | awk '{print $1}')
TMP_FILE="/tmp/.scroll-${CHECK_SUM}"
if [[ -f "${TMP_FILE}" ]]; then
SCROLL_POS=$(cat "${TMP_FILE}")
else
SCROLL_POS=0
fi
TEXT_LENGTH=${#OUT_TEXT}
MAX_OFFSET=$((TEXT_LENGTH +ADD_LENGTH -1))
if [[ "${TEXT_LENGTH}" -lt "${MAX_LENGTH}" ]]; then
MAX_LENGTH="${TEXT_LENGTH}"
fi
if [[ "${SCROLL_POS}" -gt "${MAX_OFFSET}" ]]; then
SCROLL_POS=0
fi
TEXT_LINE="${OUT_TEXT}${ADD_STR}${OUT_TEXT}${ADD_STR}${OUT_TEXT}"
TEXT_LINE=${TEXT_LINE:$SCROLL_POS:$MAX_LENGTH}
echo "<span font_family='monospace'>${TEXT_LINE}</span>"
echo "<span font_family='monospace'>${TEXT_LINE}</span>"
SCROLL_POS=$((SCROLL_POS +1))
echo "${SCROLL_POS}" > "${TMP_FILE}"
sleep "${INTERVAL}"
else
sleep 1
fi
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