diff options
Diffstat (limited to 'bin')
| -rwxr-xr-x | bin/impressive-display | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/bin/impressive-display b/bin/impressive-display new file mode 100755 index 0000000..ad744f3 --- /dev/null +++ b/bin/impressive-display @@ -0,0 +1,347 @@ +#!/bin/bash + +# uncomment for debugging... +# set -x + +# Copyright (C) 2012-2016 by Debian Edu project, http://wiki.debian.org/DebianEdu +# Mike Gabriel <mike.gabriel@das-netzwerkteam.de> + +# Impressive PDF Display is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# Impressive PDF Display is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the +# Free Software Foundation, Inc., +# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + +# dependencies: +# wmctrl +# matchbox-window-manager +# pulseaudio-utils +# +# recommendations: +# unclutter +# pulseaudio +# x11-xserver-utils +# texlive-extra-utils (for pdfnup) +# poppler-utils (for pdfinfo) + +PDF_URL="http://localhost" + +WITH_PULSEAUDIO="yes" +HIDE_IDLE_POINTER="yes" + +# There can be master terminals and slave display. +# All terminal not listed here are slave displays... +PRIMARY_DISPLAYS="$(hostname -f)" + +# these terminals can have different startup URLs +PDF_URL_PRIMARIES="" +PDF_URL_SECONDARIES="" +PDF_URL_PRIMARIES_CREDS="" +PDF_URL_SECONDARIES_CREDS="" + +PDF_FILE_PRIMARIES="" +PDF_FILE_SECONDARIES="" + +# enforce fixed resolution for displays +# PRIMARIES_RESOLUTION="1920x1080" +# SLAVE_RESOLUTION="1920x1080" +PRIMARIES_RESOLUTION= +SLAVE_RESOLUTION= + +# launch pulseaudio daemon if not already running +WITH_PULSEAUDIO="yes" + +# hide idle mouse pointer +HIDE_IDLE_POINTER="yes" + +# default screensaver settings +SCREENSAVER_SETTINGS="" + +# don't use an HTTP proxy by default +HTTP_PROXY_URL="" + +# interval of PDF continuous downloads +DOWNLOAD_INTERVAL="600" + +# show each slide for 20 seconds by default +SLIDE_DURATION="20" + +# option for impressive fading... +IMPRESSIVE_OPTIONS="--transition None" + +if [ -r $HOME/.impressive-display-secrets ] && [ ! -d $HOME/.impressive-display-secrets ]; then + . $HOME/.impressive-display-secrets +fi + +if [ -r /etc/default/impressive-display ] && [ ! -d /etc/default/impressive-display ]; then + . /etc/default/impressive-display +fi + +if [ -r $HOME/.impressive-display-rc ] && [ ! -d $HOME/.impressive-display-rc ]; then + . $HOME/.impressive-display +fi + +workdir="$HOME/.impressive-display" +mkdir -p "$workdir" +pdffile_previous="$workdir/impressive-pdffile-previous.pdf" +pdffile_downloaded="$workdir/impressive-pdffile-downloaded.pdf" +pdffile_display="$workdir/impressive-pdffile-display.pdf" + +session_lock="$workdir/.session-lock.$$" +impressive_lock="$workdir/.impressive-lock" + +# provide pulseaudio support in the browser session, if not +# already available... +#if ! pacmd stat 1>/dev/null 2>/dev/null; then +if ! pacmd stat; then + if [ "x$WITH_PULSEAUDIO" = "xyes" ]; then + if which pulseaudio 1>/dev/null; then + pulseaudio -D -n \ + -L 'module-udev-detect' \ + --exit-idle-time=65535 + fi + fi +fi + +# launch matchbox manager +if ! wmctrl -m 1>/dev/null 2>/dev/null; then + if which matchbox-window-manager 1>/dev/null; then + matchbox-window-manager & + fi +fi + +# use unclutter to hide idle mouse pointers +if [ "x$HIDE_IDLE_POINTER" = "xyes" ]; then + if which unclutter 1>/dev/null; then + unclutter & + fi +fi + +PDF_URL="$PDF_URL_SECONDARIES" +PDF_URL_CREDS="$PDF_URL_SECONDARIES_CREDS" +PDF_FILE="$PDF_FILE_SECONDARIES" +RESOLUTION="$SLAVE_RESOLUTION" + +for primary_terminal in $PRIMARIES_TERMINALS; do + if [ "x$(hostname -f)" = "x$primary_terminal" ]; then + PDF_URL="$PDF_URL_PRIMARIES" + PDF_URL_CREDS="$PDF_URL_PRIMARIES_CREDS" + PDF_FILE="$PDF_FILE_PRIMARIES" + RESOLUTION="$PRIMARIES_RESOLUTION" + break + fi +done + +if [ -n "${RESOLUTION}" ]; then + if which xrandr 1>/dev/null; then + xrandr -d :0 --output default --mode ${RESOLUTION} + fi +fi + +# Set screensaver settings +if which xset 1>/dev/null; then + xset s ${SCREENSAVER_SETTINGS} +fi + +# set some proxy related env variables, if requested... +if [ -n "$HTTP_PROXY_URL" ]; then + export http_proxy="$HTTP_PROXY_URL" + export https_proxy="$HTTP_PROXY_URL" + export ftp_proxy="$HTTP_PROXY_URL" +fi + +function cleanup { + + if [ -r "$impressive_lock" ]; then + impressive_pid=$(cat "$impressive_lock" | sed -e 's/[^0-9]*//g') + if [ -n "$impressive_pid" ]; then + kill -0 $impressive_pid 2>/dev/null && kill "$impressive_pid" + fi + fi + + for rmfile in $impressive_lock \ + $session_lock \ + $pdffile_previous \ + $pdffile_downloaded \ + $pdffile_display \ + ; + do + if [ -e "$rmfile" ]; then + rm "$rmfile" + fi + done + +} + +function pdf_is_portrait { + + check_pdffile=$1 + if [ -n "$check_pdffile" ] && [ -r "$check_pdffile" ]; then + + pdfinfo \ + -f 1 \ + -l 1000 \ + ${check_pdffile} \ + | grep "Page.* size:" \ + | while read Page _pageno size _width x _height rest; do + if [ "$(echo "${_width} / 1"|bc)" -gt "$(echo "${_height} / 1"|bc)" ]; then + let num_of_landscape_pages=num_of_landscape_pages+1 # Page is landscape... + echo "PAGE_IS_LANDSCAPE" + break + fi + done | tail -n1 | grep -E ".*PAGE_IS_LANDSCAPE.*" && return 1 + return 0 + else + # something went wrong with the provided file name... + return -1 + fi + +} + +function merge_portrait_documents { + + if which pdfnup 1>/dev/null ; then + if pdf_is_portrait "$pdffile_downloaded"; then + cd $(dirname "$pdffile_downloaded") && pdfnup "$pdffile_downloaded" && cd - 1>/dev/null + mv "${pdffile_downloaded/.pdf/-nup.pdf}" "$pdffile_display" + else + cp "$pdffile_downloaded" "$pdffile_display" + fi + else + echo "WARNING: The pdfnup tool is not installed." + cp "$pdffile_downloaded" "$pdffile_display" + fi + +} + +function local_pdffile { + + cp $PDF_FILE $workdir/$(basename $PDF_FILE) + + # is the PDF file gzipped? + if echo $(basename $PDF_FILE) | grep -E ".*\.gz"; then + PDF_FILE=${PDF_FILE/.gz/} + gunzip $workdir/$(basename $PDF_FILE).gz + fi + mv $workdir/$(basename $PDF_FILE) "$pdffile_downloaded" + + merge_portrait_documents + +} + +function download_pdffile { + + if [ -r "$pdffile_downloaded" ]; then + cp "$pdffile_downloaded" "$pdffile_previous" + fi + if [ -n "$PDF_URL_CREDS" ]; then + creds="-u $PDF_URL_CREDS" + fi + curl $creds "$PDF_URL" 1> "$pdffile_downloaded" 2>/dev/null + + if pdfinfo "$pdffile_downloaded" 1>/dev/null 2>/dev/null; then + + merge_portrait_documents + + cmp -s "$pdffile_downloaded" "$pdffile_previous"> /dev/null + if [ $? -eq 1 ]; then + echo -n "RELOAD" > $impressive_lock + fi + + pdffile=$pdffile_display + + else + + echo "WARNING: PDF file format problems. Maybe not a PDF file?" + + fi + +} + +function download_loop { + + # do an initial PDF retrieval.. + download_pdffile + + if [ "x$DOWNLOAD_INTERVAL" != "x0" ]; then + ( + while [ -e "$session_lock" ]; do + sleep $DOWNLOAD_INTERVAL + download_pdffile + done + ) & + fi + +} + +function reloadable_impressive { + + if which impressive 1>/dev/null; then + + while [ -e "$session_lock" ]; do + + impressive ${IMPRESSIVE_OPTIONS} --fake-fullscreen --wrap -a ${SLIDE_DURATION} --nologo "${pdffile_display}" 1>/dev/null & + impressive_pid=$! + + echo -n "$impressive_pid" > "$impressive_lock" + + while [ -r $impressive_lock ] && [ "$(cat $impressive_lock)" != "RELOAD" ] && [ -e "$session_lock" ]; do + sleep 1 + if ! kill -0 "$impressive_pid"; then + rm "$session_lock" + break + fi + done + + kill -0 "$impressive_pid" && kill "$impressive_pid" + + done + + else + echo "ERROR: The impressive application is not installed." + fi + +} + + +function create_lock { + + trap "cleanup" SIGINT SIGTERM ERR + + touch "$session_lock" + +} + +### MAIN ### + +if [ -n "$PDF_URL" ]; then + + echo "INFO: PDF_URL is configured. Using PDF file from given URL." + create_lock + download_loop + +elif [ -n "$PDF_FILE" ]; then + + echo "INFO: PDF_FILE is configured. Using local PDF." + create_lock + local_pdffile + +else + + echo "ERROR: Neither PDF_FILE nor PDF_URL has been configured. Doing nothing." + exit 0 + +fi + +reloadable_impressive + +exit 0 |