1. rcrnstn/background
  2. Commit 57b5b74a77fed13da8343e45d8e1940a971e0f39
Browse code

Add implementation

Robert Cranston authored on 30/01/2022 19:39:29
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README.md
History View file @ 57b5b74
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@@ -6,6 +6,32 @@ Set [X Window System][] [background][] image/video.
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 [X Window System]: https://en.wikipedia.org/wiki/X_Window_System
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 [background]: https://en.wikipedia.org/wiki/Wallpaper_(computing)
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+## Usage
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+
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+`background --help`:
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+
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+```
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+background 1.0
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+
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+Set X Window System background image/video.
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+
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+usage:
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+  background [-v|--video] [--] [<path>]
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+  background -h|--help
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+  background --version
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+
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+options:
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+  -v, --video
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+    Changes the default <path> to
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+    ${XDG_DATA_HOME:-$HOME/.local/share}/backgrounds-video.
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+arguments:
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+  <path>
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+    If not a directory, set it as background. If a directory, search
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+    recursively in it (resolving symlinks) and set a random file as
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+    background.
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+    [default: ${XDG_DATA_HOME:-$HOME/.local/share}/backgrounds]
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+```
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+
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 ## License
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 Licensed under the [ISC License][] unless otherwise noted, see the
bin/background
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@@ -6,10 +6,14 @@ set -euC
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 #//// Set X Window System background image/video.
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 #////
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 ###// usage:
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-#////   background [<path>]
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+#////   background [-v|--video] [--] [<path>]
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 #////   background -h|--help
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 #////   background --version
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 #////
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+###// options:
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+####/   -v, --video
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+#////     Changes the default <path> to
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+#////     ${XDG_DATA_HOME:-$HOME/.local/share}/backgrounds-video.
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 ###// arguments:
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 ####/   <path>
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 #////     If not a directory, set it as background. If a directory, search
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@@ -37,9 +41,44 @@ in
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   '--version') version; ;;
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 esac
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+## Parse options
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+suffix=''
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+while [ $# -gt 0 ]
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+do
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+  case "$1"
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+  in
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+    '-v'|'--video') suffix='-video'; shift; ;;
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+    '--') shift; break; ;;
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+    *) break; ;;
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+  esac
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+done
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+
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 ## Parse optional arguments
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-path="${XDG_DATA_HOME:-"$HOME/.local/share"}/backgrounds"
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+path="${XDG_DATA_HOME:-"$HOME/.local/share"}/backgrounds${suffix}"
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 [ $# -eq 0 ] || { path="$1"; shift; }
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 ## Parse unrecognized arguments
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 argend "$@"
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+
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+## Convert `path` from directory to file if needed
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+if [ -d "$path" ]
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+then
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+  path="$(find -L "$path" \! -type d | shuf -n 1)"
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+fi
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+
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+## Set `daemon`
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+daemon="$(dirname "$0")/../libexec/background/daemon"
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+
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+## Opportunistically use `hsetroot` for images
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+if [ "$(command -v xdg-mime)" ] && [ "$(command -v hsetroot)" ]
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+then
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+  if xdg-mime query filetype "$path" | grep -q '^image/'
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+  then
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+    "$daemon" --kill
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+    hsetroot -cover "$path"
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+    exit 0
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+  fi
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+fi
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+
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+## Run daemon
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+setsid "$daemon" "$path" &
libexec/background/daemon
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new file mode 100755
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@@ -0,0 +1,37 @@
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+#!/bin/sh
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+set -euC
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+
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+## Set `pidfile`
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+pidfile="${XDG_RUNTIME_DIR:-"/var/run/user/$(id -u)"}/background.pid"
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+
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+## Kill any running daemon
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+if [ -r "$pidfile" ]
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+then
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+  pid="$(cat "$pidfile")"
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+  kill -- "-$pid"
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+  while kill -0 "$pid" 2> '/dev/null' ; do : ; done
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+fi
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+
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+## Exit early if only killing
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+if [ "$1" = '--kill' ]
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+then
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+  exit 0
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+fi
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+
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+## Set up `pidfile`
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+printf '%s' "$$" >| "$pidfile"
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+trap 'rm "$pidfile"' EXIT
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+trap 'exit 0' INT TERM
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+
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+## Set background
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+nice \
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+  xwinwrap -fs -fdt -ov -un -b -s -st -sp -ni -nf -- \
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+  mpv \
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+    -wid WID \
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+    --really-quiet \
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+    --no-audio \
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+    --panscan=1 \
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+    --loop-file=inf \
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+    --ytdl-format='bestvideo[height<=?720][fps<=?30]' \
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+    "$@" \
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+  2> '/dev/null'