188 lines
6.2 KiB
Bash
Executable File
188 lines
6.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Description:
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# Change the desktop wallpaper and generate a blurred version.
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#
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# Requirs:
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# - zenity (for file selection dialog)
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# - imagemagick (for image processing)
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# - swww (wallpaper daemon)
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# - notify-send (for notifications)
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# - change-colortheme (from scripts/change-colortheme)
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# - flock (usually part of util-linux)
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set -euo pipefail
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trap 'echo $LINENO: $BASH_COMMAND' ERR
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# Lock
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exec {LOCK_FD}>/tmp/"$(basename "$0")".lock
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flock -n "$LOCK_FD" || {
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echo "Another instance is running. Exiting."
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notify-send -a "change-wallpaper" "Error" "Another instance is running. Exiting."
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exit 1
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}
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# Open a file selection dialog if no argument is provided
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if [ -z "${1-}" ]; then
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image=$(zenity --file-selection --title="Open File" --file-filter="*.jpg *.jpeg *.png *.webp *.bmp *.jfif *.tiff *.avif *.heic *.heif")
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else
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image="$1"
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fi
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[ -z "$image" ] && exit 1
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[ ! -f "$image" ] && exit 1
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# Obtain screen resolution
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screen_width=${2-}
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screen_height=${3-}
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[ -z "$screen_width" ] && {
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if [ "$XDG_CURRENT_DESKTOP" = "Hyprland" ]; then
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screen_width=$(hyprctl -j monitors | jq '.[0].resolution.x')
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elif [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
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screen_width=$(niri msg focused-output | grep 'Current mode' | awk '{print $3}' | cut -d'x' -f1)
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fi
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}
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[ -z "$screen_height" ] && {
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if [ "$XDG_CURRENT_DESKTOP" = "Hyprland" ]; then
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screen_height=$(hyprctl -j monitors | jq '.[0].resolution.y')
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elif [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
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screen_height=$(niri msg focused-output | grep 'Current mode' | awk '{print $3}' | cut -d'x' -f2)
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fi
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}
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## Default to 2k
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screen_width=${screen_width:-2560}
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screen_height=${screen_height:-1440}
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# $HOME/.config/wallpaper-chooser/config.json:
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# ```json
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# "sort": {
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# "type": "date",
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# "reverse": true
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# }
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# ```
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# So in order to let the most recently used wallpapers appear first:
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touch "$image" 2>/dev/null || true # ignore errors
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# Copy image to local wallpaper directory
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## Format of current and cached wallpaper
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wallpaper_ext="png"
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## Generate a random name for the current wallpaper
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set +o pipefail # SIGPIPE is expected here
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random_name=$(tr -dc 'a-zA-Z0-9' </dev/urandom | head -c 16)
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set -o pipefail
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## Directory to store current wallpaper
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current_dir="$HOME/.local/share/wallpaper/current"
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## Path to current wallpaper image
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wallpaper_image="$current_dir/wallpaper-${random_name}.${wallpaper_ext}"
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mkdir -p "$current_dir"
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## Batch copy using a temporary file to avoid incomplete file being used
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temp_img=$(mktemp --suffix=."$wallpaper_ext")
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trap 'rm -f "$temp_img"' EXIT
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magick "$image" -resize "${screen_width}x${screen_height}^" -gravity center -extent "${screen_width}x${screen_height}" "$temp_img"
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cp "$temp_img" "$wallpaper_image"
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## Generate hash for caching,
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## based on content of the source image and resolution of the resized image
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hash="$(md5sum "$image" | awk '{print $1}')-${screen_width}x${screen_height}"
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# Clean up old wallpapers in the same directory of current wallpaper.
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# Only keep the newly added one so the wallpaper-daemon can pick it up directly
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find "$current_dir" -type f -name "wallpaper-*" ! -name "$(basename "$wallpaper_image")" -delete
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# Generate blurred wallpaper
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## Similarly, store blurred version of current wallpaper in separate directory
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blur_dir="$HOME/.local/share/wallpaper/blurred"
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## Directory to cache blurred wallpapers, so that we don't need to regenerate
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## them every time when switching wallpapers. This makes it possible to have
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## an auto-played slideshow with blurred wallpapers without noticeable delay.
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blur_cache_dir="$HOME/.local/share/wallpaper/blurred-cache"
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mkdir -p "$blur_dir" "$blur_cache_dir"
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blurred_image="$blur_dir/blurred-${random_name}.${wallpaper_ext}"
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blurred_cache_image="$blur_cache_dir/${hash}.${wallpaper_ext}"
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## Time consuming task (magick -blur) in background
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(
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# notify-send -a "change-wallpaper" "Generating Blurred Wallpaper" "This may take a few seconds..."
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function apply_blured {
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find "$blur_dir" -type f -name "blurred-*" ! -name "$(basename "$blurred_image")" -delete
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if [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
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swww img -n backdrop "$blurred_image" --transition-type fade --transition-duration 2 >/dev/null 2>/dev/null
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fi
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notify-send -a "change-wallpaper" "Blurred Wallpaper Applied" "$blurred_image" -i "$blurred_image"
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}
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### Check if cached blurred image exists
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if [ -f "$blurred_cache_image" ]; then
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# sleep 1 # Some ugly workaround
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if ! cp -f "$blurred_cache_image" "$blurred_image"; then
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echo "Could not copy cached blurred image"
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# exit 1 # Non-critical error
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else
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apply_blured
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exit 0
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fi
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fi
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sigma=$(magick identify -format "%w %h" "$wallpaper_image" | awk -v f=0.01 '{
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m=($1>$2)?$1:$2;
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s=m*f;
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if(s<2) s=2;
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if(s>200) s=200;
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printf "%.2f", s
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}')
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### Batch processing using a temporary file to avoid incomplete file being used
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temp_blurred=$(mktemp --suffix=."$wallpaper_ext") || exit 1
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trap 'rm -f "${temp_blurred}"' EXIT
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magick "$wallpaper_image" -blur 0x"$sigma" "$temp_blurred" || {
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echo "Could not create blurred image"
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exit 1
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}
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mv -f "$temp_blurred" "$blurred_image" || {
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echo "Could not move blurred image to cache directory"
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exit 1
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}
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cp -f "$blurred_image" "$blurred_cache_image" || {
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echo "Could not cache blurred image"
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# exit 1 # Non-critical error
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}
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apply_blured
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) &
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# Apply wallpaper
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if [ "$XDG_CURRENT_DESKTOP" = "Hyprland" ]; then
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swww img -n background "$wallpaper_image" --transition-type fade --transition-duration 2 >/dev/null 2>/dev/null
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notify-send -a "change-wallpaper" "Wallpaper Changed" "$image" -i "$wallpaper_image"
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change-colortheme -i "$wallpaper_image" || exit 1
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elif [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
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### Handled in wallpaper-daemon
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# swww img -n background "$wallpaper_image" --transition-type fade --transition-duration 2 > /dev/null 2> /dev/null
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notify-send -a "change-wallpaper" "Wallpaper Changed" "$image" -i "$wallpaper_image"
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change-colortheme -i "$wallpaper_image" || exit 1
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else
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echo "Unsupported desktop environment: $XDG_CURRENT_DESKTOP"
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exit 1
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fi
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