1 files changed, 248 insertions, 0 deletions

diff --git a/X11/mpd/ncmpcpp/scripts/album-art b/X11/mpd/ncmpcpp/scripts/album-art
new file mode 100755
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+++ b/X11/mpd/ncmpcpp/scripts/album-art
@@ -0,0 +1,248 @@
+#!/usr/bin/env bash
+
+## Copyright (C) 2020-2021 Aditya Shakya <adi1090x@gmail.com>
+## Everyone is permitted to copy and distribute copies of this file under GNU-GPL3
+
+## Cover art script for ncmpcpp
+
+# SETTINGS
+music_library="$HOME/Music"
+padding_top=3
+padding_bottom=0
+padding_right=0
+max_width=40
+reserved_playlist_cols=31
+reserved_cols_in_percent="false"
+force_square="true"
+square_alignment="top"
+left_aligned="true"
+padding_left=0
+
+# Only set this if the geometries are wrong or ncmpcpp shouts at you to do it.
+# Visually select/highlight a character on your terminal, zoom in an image 
+# editor and count how many pixels a character's width and height are.
+font_height=
+font_width=
+
+main() {
+    kill_previous_instances >/dev/null 2>&1
+    find_cover_image        >/dev/null 2>&1
+    display_cover_image     2>/dev/null
+    dunstify -u low --replace=69 -i "$cover_path" "$(mpc current)"
+    detect_window_resizes   >/dev/null 2>&1
+}
+
+# ==== Main functions =========================================================
+
+kill_previous_instances() {
+    script_name=$(basename "$0")
+    for pid in $(pidof -x "$script_name"); do
+        if [ "$pid" != $$ ]; then
+            kill -15 "$pid"
+        fi 
+    done
+}
+
+find_cover_image() {
+
+    # First we check if the audio file has an embedded album art
+    ext="$(mpc --format %file% current | sed 's/^.*\.//')"
+    if [ "$ext" = "flac" ]; then
+        # since FFMPEG cannot export embedded FLAC art we use metaflac
+        metaflac --export-picture-to=/tmp/mpd_cover.jpg \
+            "$(mpc --format "$music_library"/%file% current)" &&
+            cover_path="/tmp/mpd_cover.jpg" && return
+    else
+        ffmpeg -y -i "$(mpc --format "$music_library"/%file% | head -n 1)" \
+            /tmp/mpd_cover.jpg &&
+            cover_path="/tmp/mpd_cover.jpg" && return
+    fi
+
+    # If no embedded art was found we look inside the music file's directory
+    album="$(mpc --format %album% current)"
+    file="$(mpc --format %file% current)"
+    album_dir="${file%/*}"
+    album_dir="$music_library/$album_dir"
+    found_covers="$(find "$album_dir" -type d -exec find {} -maxdepth 1 -type f \
+    -iregex ".*/.*\(${album}\|cover\|folder\|artwork\|front\).*[.]\\(jpe?g\|png\|gif\|bmp\)" \; )"
+    cover_path="$(echo "$found_covers" | head -n1)"
+    if [ -n "$cover_path" ]; then
+        return
+    fi
+
+    # If we still failed to find a cover image, we use the fallback
+    if [ -z "$cover_path" ]; then
+        cover_path="$HOME/.ncmpcpp/scripts/music.png"
+    fi
+}
+
+display_cover_image() {
+    compute_geometry
+
+    send_to_ueberzug \
+        action "add" \
+        identifier "mpd_cover" \
+        path "$cover_path" \
+        x "$ueber_left" \
+        y "$padding_top" \
+        height "$ueber_height" \
+        width "$ueber_width" \
+        synchronously_draw "True" \
+        scaler "forced_cover" \
+        scaling_position_x "0.5"
+}
+
+detect_window_resizes() {
+    {
+        trap 'display_cover_image' WINCH
+        while :; do sleep .1; done
+    } &
+}
+
+
+# ==== Helper functions =========================================================
+
+compute_geometry() {
+    unset LINES COLUMNS # Required in order for tput to work in a script
+    term_lines=$(tput lines)
+    term_cols=$(tput cols)
+    if [ -z "$font_height" ] || [ -z "$font_height" ]; then
+        guess_font_size
+    fi
+
+    ueber_height=$(( term_lines - padding_top - padding_bottom ))
+    # Because Ueberzug uses characters as a unit we must multiply
+    # the line count (height) by the font size ratio in order to
+    # obtain an equivalent width in column count
+    ueber_width=$(( ueber_height * font_height / font_width ))
+    ueber_left=$(( term_cols - ueber_width - padding_right ))
+
+    if [ "$left_aligned" = "true" ]; then
+        compute_geometry_left_aligned
+    else
+        compute_geometry_right_aligned
+    fi
+
+    apply_force_square_setting
+}
+
+compute_geometry_left_aligned() {
+    ueber_left=$padding_left
+    max_width_chars=$(( term_cols * max_width / 100 ))
+    if [ "$max_width" != 0 ] &&
+        [ $(( ueber_width + padding_right + padding_left )) -gt "$max_width_chars" ]; then
+        ueber_width=$(( max_width_chars - padding_left - padding_right ))
+    fi
+}
+
+compute_geometry_right_aligned() {
+    if [ "$reserved_cols_in_percent" = "true" ]; then
+        ueber_left_percent=$(printf "%.0f\n" $(calc "$ueber_left" / "$term_cols" '*' 100))
+        if [ "$ueber_left_percent" -lt "$reserved_playlist_cols" ]; then
+            ueber_left=$(( term_cols * reserved_playlist_cols / 100  ))
+            ueber_width=$(( term_cols - ueber_left - padding_right ))
+        fi
+    else
+        if [ "$ueber_left" -lt "$reserved_playlist_cols" ]; then
+            ueber_left=$reserved_playlist_cols
+            ueber_width=$(( term_cols - ueber_left - padding_right ))
+        fi
+
+    fi
+
+    if [ "$max_width" != 0 ] && [ "$ueber_width" -gt "$max_width" ]; then
+        ueber_width=$max_width
+        ueber_left=$(( term_cols - ueber_width - padding_right ))
+    fi
+}
+
+apply_force_square_setting() {
+    if [ $force_square = "true" ]; then
+        ueber_height=$(( ueber_width * font_width / font_height ))
+        case "$square_alignment" in
+            center)
+                area=$(( term_lines - padding_top - padding_bottom ))
+                padding_top=$(( padding_top + area / 2 - ueber_height / 2  ))
+                ;;
+            bottom)
+                padding_top=$(( term_lines - padding_bottom - ueber_height ))
+                ;;
+            *) ;;
+        esac
+    fi
+}
+
+guess_font_size() {
+    # A font width and height estimate is required to
+    # properly compute the cover width (in columns).
+    # We are reproducing the arithmetic used by Ueberzug
+    # to guess font size.
+    # https://github.com/seebye/ueberzug/blob/master/ueberzug/terminal.py#L24
+
+    guess_terminal_pixelsize
+
+    approx_font_width=$(( term_width / term_cols ))
+    approx_font_height=$(( term_height / term_lines ))
+
+    term_xpadding=$(( ( - approx_font_width * term_cols + term_width ) / 2 ))
+    term_ypadding=$(( ( - approx_font_height * term_lines + term_height ) / 2 ))
+
+    font_width=$(( (term_width - 2 * term_xpadding) / term_cols ))
+    font_height=$(( (term_height - 2 * term_ypadding) / term_lines ))
+}
+
+guess_terminal_pixelsize() {
+    # We are re-using the same Python snippet that
+    # Ueberzug utilizes to retrieve terminal window size.
+    # https://github.com/seebye/ueberzug/blob/master/ueberzug/terminal.py#L10
+
+    python <<END
+import sys, struct, fcntl, termios
+
+def get_geometry():
+    fd_pty = sys.stdout.fileno()
+    farg = struct.pack("HHHH", 0, 0, 0, 0)
+    fretint = fcntl.ioctl(fd_pty, termios.TIOCGWINSZ, farg)
+    rows, cols, xpixels, ypixels = struct.unpack("HHHH", fretint)
+    return "{} {}".format(xpixels, ypixels)
+
+output = get_geometry()
+f = open("/tmp/ncmpcpp_geometry.txt", "w")
+f.write(output)
+f.close()
+END
+
+    # ioctl doesn't work inside $() for some reason so we
+    # must use a temporary file
+    term_width=$(awk '{print $1}' /tmp/ncmpcpp_geometry.txt)
+    term_height=$(awk '{print $2}' /tmp/ncmpcpp_geometry.txt)
+    rm "/tmp/ncmpcpp_geometry.txt"
+
+    if ! is_font_size_successfully_computed; then
+        echo "Failed to guess font size, try setting it in `basename $0` settings"
+    fi
+}
+
+is_font_size_successfully_computed() {
+    [ -n "$term_height" ] && [ -n "$term_width" ] &&
+        [ "$term_height" != "0" ] && [ "$term_width" != "0" ]
+}
+
+
+calc() {
+    awk "BEGIN{print $*}"
+}
+
+send_to_ueberzug() {
+    old_IFS="$IFS"
+
+    # Ueberzug's "simple parser" uses tab-separated
+    # keys and values so we separate words with tabs
+    # and send the result to the wrapper's FIFO
+    IFS="$(printf "\t")"
+    echo "$*" > "$FIFO_UEBERZUG"
+
+    IFS=${old_IFS}
+}
+
+main