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|
#!/usr/bin/env bash
#
# Behavior
# Userscript for qutebrowser which casts the url passed in $1 to the default
# ChromeCast device in the network using the program `castnow`
#
# Usage
# You can launch the script from qutebrowser as follows:
# spawn --userscript ${PATH_TO_FILE} {url}
#
# Then, you can control the chromecast by launching the simple command
# `castnow` in a shell which will connect to the running castnow instance.
#
# For stopping the script, issue the command `pkill -f castnow` which would
# then let the rest of the userscript execute for cleaning temporary file.
#
# Thanks
# This userscript borrows Thorsten Wißmann's javascript code from his `mpv`
# userscript.
#
# Dependencies
# - castnow, https://github.com/xat/castnow
# - youtube-dl (https://youtube-dl.org/) or a drop-in replacement such as
# yt-dlp (https://github.com/yt-dlp/yt-dlp).
#
# Configuration:
# This script looks at the optional QUTE_CAST_YTDL_PROGRAM environment
# variable (if it exists) to decide which program to use for downloading
# videos. If specified, this should be youtube-dl or a drop-in replacement
# for it.
#
# Author
# Simon Désaulniers <sim.desaulniers@gmail.com>
if [ -z "$QUTE_FIFO" ] ; then
cat 1>&2 <<EOF
Error: $0 can not be run as a standalone script.
It is a qutebrowser userscript. In order to use it, call it using
'spawn --userscript' as described in qute://help/userscripts.html
EOF
exit 1
fi
msg() {
local cmd="$1"
shift
local msg="$*"
if [ -z "$QUTE_FIFO" ] ; then
echo "$cmd: $msg" >&2
else
echo "message-$cmd '${msg//\'/\\\'}'" >> "$QUTE_FIFO"
fi
}
js() {
cat <<EOF
function descendantOfTagName(child, ancestorTagName) {
// tells whether child has some (proper) ancestor
// with the tag name ancestorTagName
while (child.parentNode != null) {
child = child.parentNode;
if (typeof child.tagName === 'undefined') break;
if (child.tagName.toUpperCase() == ancestorTagName.toUpperCase()) {
return true;
}
}
return false;
}
var App = {};
var all_videos = [];
all_videos.push.apply(all_videos, document.getElementsByTagName("video"));
all_videos.push.apply(all_videos, document.getElementsByTagName("object"));
all_videos.push.apply(all_videos, document.getElementsByTagName("embed"));
App.backup_videos = Array();
App.all_replacements = Array();
for (i = 0; i < all_videos.length; i++) {
var video = all_videos[i];
if (descendantOfTagName(video, "object")) {
// skip tags that are contained in an object, because we hide
// the object anyway.
continue;
}
var replacement = document.createElement("div");
replacement.innerHTML = "
<p style=\\"margin-bottom: 0.5em\\">
The video is being cast on your ChromeCast device.
</p>
<p>
In order to restore this particular video
<a style=\\"font-weight: bold;
color: white;
background: transparent;
\\"
onClick=\\"restore_video(this, " + i + ");\\"
href=\\"javascript: restore_video(this, " + i + ")\\"
>click here</a>.
</p>
";
replacement.style.position = "relative";
replacement.style.zIndex = "100003000000";
replacement.style.fontSize = "1rem";
replacement.style.textAlign = "center";
replacement.style.verticalAlign = "middle";
replacement.style.height = "100%";
replacement.style.background = "#101010";
replacement.style.color = "white";
replacement.style.border = "4px dashed #545454";
replacement.style.padding = "2em";
replacement.style.margin = "auto";
App.all_replacements[i] = replacement;
App.backup_videos[i] = video;
video.parentNode.replaceChild(replacement, video);
}
function restore_video(obj, index) {
obj = App.all_replacements[index];
video = App.backup_videos[index];
console.log(video);
obj.parentNode.replaceChild(video, obj);
}
/** force repainting the video, thanks to:
* http://web.archive.org/web/20151029064649/https://martinwolf.org/2014/06/10/force-repaint-of-an-element-with-javascript/
*/
var siteHeader = document.getElementById('header');
siteHeader.style.display='none';
siteHeader.offsetHeight; // no need to store this anywhere, the reference is enough
siteHeader.style.display='block';
EOF
}
printjs() {
js | sed 's,//.*$,,' | tr '\n' ' '
}
echo "jseval -q $(printjs)" >> "$QUTE_FIFO"
tmpdir=$(mktemp -d)
file_to_cast=${tmpdir}/qutecast
cast_program=$(command -v castnow)
# pick a ytdl program
for p in "$QUTE_CAST_YTDL_PROGRAM" yt-dlp youtube-dl; do
ytdl_program=$(command -v -- "$p")
[ "$ytdl_program" == "" ] || break
done
if [[ "${cast_program}" == "" ]]; then
msg error "castnow can't be found"
exit 1
fi
if [[ "${ytdl_program}" == "" ]]; then
msg error "youtube-dl or a drop-in replacement can't be found in PATH, and no installed program " \
"specified in QUTE_CAST_YTDL_PROGRAM (currently \"$QUTE_CAST_YTDL_PROGRAM\")"
exit 1
fi
# kill any running instance of castnow
pkill -f -- "${cast_program}"
# start youtube download in stream mode (-o -) into temporary file
"${ytdl_program}" -qo - "$1" > "${file_to_cast}" &
ytdl_pid=$!
msg info "Casting $1" >> "$QUTE_FIFO"
# start castnow in stream mode to cast on ChromeCast
tail -F "${file_to_cast}" | ${cast_program} -
# cleanup remaining background process and file on disk
kill ${ytdl_pid}
rm -rf "${tmpdir}"
|
