added screen locker with dual monitors support from meskarune/i3lock-…

…fancy#87

config

@@ -209,7 +209,7 @@ mode "mode_mic" {
 bindsym $mod+m mode "mode_mic"
 
 # lock screen
-bindsym Mod4+l exec i3lock
+bindsym Mod4+l exec --no-startup-id ~/.config/i3/i3lock-fancy-dualmonitor
 
 # Start i3bar to display a workspace bar (plus the system information i3status
 # finds out, if available)

i3lock-fancy-dualmonitor

@@ -0,0 +1,236 @@
+#!/usr/bin/env bash
+# Author: Dolores Portalatin <[email protected]>
+# Dependencies: imagemagick, i3lock-color-git, scrot, wmctrl (optional)
+set -o errexit -o noclobber -o nounset
+
+# Determines the brightness of the screenshot
+# $1 - Image file to check
+# $2 - Arguments passed to 'convert'. For example this can be used to crop the image, to just sample a part of it
+get_brightness() {
+    # Quite fast way of getting a brightness value
+    convert "$1" +repage $2 -colorspace gray -format "%[fx:round(100*mean)]" info:
+}
+
+# Determines the width of the given text when processed using the text_options flag
+# $1 - The text to checked
+# Prints the text width in pixels to stdout
+get_text_width() {
+    # empty text or text containing only whitespace would throw an error so we just return zero
+    if [ -z "${1// }" ]; then
+        echo 0
+        return
+    fi
+    convert "${text_options[@]}" label:"$1" -format "%[fx:w]\n" info:
+}
+
+# Calculates the absolute positions for the lock and text or the given monitor, generates the command line arguemnts
+# for convert that apply the lock icon and the text to the proper locations and adds them to the decorations_params array
+# $1 - Monitor Width
+# $2 - Monitor Height
+# $3 - X Offset
+# $4 - Y Offset
+# Prints the brigthness in the center of the monitor to file descriptor 3
+# This is used to determine the average brightness in the centers of all the monitors and to then set the proper colors
+# for i3lock-color
+process_monitor() {
+    width=$1
+    height=$2
+    x_offset=$3
+    y_offset=$4
+
+    # center coordinates relative to the current monitor
+    x_mid=$((width / 2))
+    y_mid=$((height / 2))
+
+    # absolute X, Y coordinates of the top left edge of the text
+    x_text=$((x_offset + x_mid - (text_width / 2)))
+    y_text=$((y_offset + y_mid + 160))
+
+    # absolute X, Y coordinates of the top left edge of the icon
+    # The lock icon has dimensions 60x60, we subtract half of that from each dimension
+    # If the lock dimensions ever change, these values here need to be changed too
+    x_icon=$((x_offset + x_mid - 30))
+    y_icon=$((y_offset + y_mid - 30))
+
+    # Get brightness for the middle of the monitor
+    brightness="$(get_brightness "$image" "-crop 100x100+$x_icon+$y_icon")"
+
+    if [ "$brightness" -gt "$threshold" ]; then # bright background image and black text
+        text_color="black"
+        icon="$scriptpath/icons/lockdark.png"
+    else # dark background image and white text
+        text_color="white"
+        icon="$scriptpath/icons/lock.png"
+    fi
+
+    decoration_params+=(+repage)
+
+    if [ "$text_width" -ne 0 ]; then
+        # Only add text flags, if there actually is text
+        decoration_params+=("${text_options[@]}" -fill "$text_color" -annotate "+$x_text+$y_text" "$text")
+    fi
+
+    decoration_params+=("$icon" -geometry "+$x_icon+$y_icon" -composite)
+
+
+    # Write brightness to file descriptor
+    exec 3<<< "$brightness"
+}
+
+# get path where the script is located to find the lock icon
+scriptpath=$(readlink -f -- "$0")
+scriptpath=${scriptpath%/*}
+
+hue=(-level "0%,100%,0.6")
+effect=(-filter Gaussian -resize 20% -define "filter:sigma=1.5" -resize 500.5%)
+# default system sans-serif font
+font=$(convert -list font | awk "{ a[NR] = \$2 } /family: $(fc-match sans -f "%{family}\n")/ { print a[NR-1]; exit }")
+
+image="$(mktemp --suffix=.png)"
+
+# brightness value to compare to, everything above is considered white and everything below black
+threshold="40"
+
+desktop=""
+shot=(import -window root)
+i3lock_cmd=(i3lock -i "$image")
+shot_custom=false
+
+options="Options:
+    -h, --help       This help menu.
+
+    -d, --desktop    Attempt to minimize all windows before locking.
+
+    -g, --greyscale  Set background to greyscale instead of color.
+
+    -p, --pixelate   Pixelate the background instead of blur, runs faster.
+
+    -f <fontname>, --font <fontname>  Set a custom font.
+
+    -t <text>, --text <text> Set a custom text prompt.
+
+    -l, --listfonts  Display a list of possible fonts for use with -f/--font.
+                     Note: this option will not lock the screen, it displays
+                     the list and exits immediately.
+
+    -n, --nofork     Do not fork i3lock after starting.
+
+    --               Must be last option. Set command to use for taking a
+                     screenshot. Default is 'import -window root'. Using 'scrot'
+                     or 'maim' will increase script speed and allow setting
+                     custom flags like having a delay."
+
+# move pipefail down as for some reason "convert -list font" returns 1
+set -o pipefail
+trap 'rm -f "$image"' EXIT
+temp="$(getopt -o :hdnpglt:f: -l desktop,help,listfonts,nofork,pixelate,greyscale,text:,font: --name "$0" -- "$@")"
+eval set -- "$temp"
+
+# l10n support
+text="Type password to unlock"
+case "${LANG:-}" in
+    de_* ) text="Bitte Passwort eingeben" ;; # Deutsch
+    da_* ) text="Indtast adgangskode" ;; # Danish
+    en_* ) text="Type password to unlock" ;; # English
+    es_* ) text="Ingrese su contraseña" ;; # Española
+    fr_* ) text="Entrez votre mot de passe" ;; # Français
+    id_* ) text="Masukkan kata sandi Anda" ;; # Bahasa Indonesia
+    it_* ) text="Inserisci la password" ;; # Italian
+    pl_* ) text="Podaj hasło" ;; # Polish
+    pt_* ) text="Digite a senha para desbloquear" ;; # Português
+    ru_* ) text="Введите пароль" ;; # Russian
+    * ) text="Type password to unlock" ;; # Default to English
+esac
+
+while true ; do
+    case "$1" in
+        -h|--help)
+            printf "Usage: %s [options]\n\n%s\n\n" "${0##*/}" "$options"; exit 1 ;;
+        -d|--desktop) desktop=$(command -V wmctrl) ; shift ;;
+        -g|--greyscale) hue=(-level "0%,100%,0.6" -set colorspace Gray -separate -average) ; shift ;;
+        -p|--pixelate) effect=(-scale 10% -scale 1000%) ; shift ;;
+        -f|--font)
+            case "$2" in
+                "") shift 2 ;;
+                *) font=$2 ; shift 2 ;;
+            esac ;;
+        -t|--text) text=$2 ; shift 2 ;;
+        -l|--listfonts)
+            convert -list font | awk -F: '/Font: / { print $2 }' | sort -du | command -- ${PAGER:-less}
+            exit 0 ;;
+        -n|--nofork) i3lock_cmd+=(--nofork) ; shift ;;
+        --) shift; shot_custom=true; break ;;
+        *) echo "error" ; exit 1 ;;
+    esac
+done
+
+if "$shot_custom" && [[ $# -gt 0 ]]; then
+    shot=("$@");
+fi
+
+text_options=(-font "$font" -pointsize 26)
+text_width=$(get_text_width "$text")
+
+command -- "${shot[@]}" "$image"
+
+# All the arguments to be passed to convert, to add the lock and text to the monitors is collected here so that we can
+# apply them in a single call to convert
+decoration_params=()
+
+# We collect the brightness values from all the monitors and average them, from that we determine which flags to pass to
+# i3lock-color since the colors for i3lock-color cannot be specified per monitor.
+# We could also just call get_brightness on the whole image but process_monitor samples only the center
+# of the screen where the lock actually is, so we get a better value for the brightness
+sum_brightness=0
+num_monitors=0
+
+# Loop through all connected monitors (as reported by xrandr)
+# For each monitor the convert arguments to add the lock and text to that monitor are generated
+while read -r monitor; do
+    if [[ "$monitor" =~ ([0-9]+)x([0-9]+)\+([0-9]+)\+([0-9]+) ]]; then
+        width=${BASH_REMATCH[1]}
+        height=${BASH_REMATCH[2]}
+        x_offset=${BASH_REMATCH[3]}
+        y_offset=${BASH_REMATCH[4]}
+
+        # We get the return value from the function by using a new file descriptor
+        # The traditional approach of using $(process_monitor ...) and echo doesn't work because it forks into a
+        # subshell and then process_monitor cannot access decoration_params
+        exec 3>&-
+        process_monitor "$width" "$height" "$x_offset" "$y_offset" && read -r brightness <&3
+        exec 3>&-
+
+        sum_brightness=$((brightness + sum_brightness))
+        num_monitors=$((num_monitors + 1))
+    fi
+done <<<"$(xrandr --verbose | grep "\bconnected\b")"
+
+convert "$image" "${hue[@]}" "${effect[@]}" "${decoration_params[@]}" "$image"
+
+avg_brightness=$((sum_brightness / num_monitors))
+
+if [ "$avg_brightness" -gt "$threshold" ]; then # Screenshot is rather bright, so we use dark colors
+    param=("--textcolor=00000000" "--insidecolor=0000001c" "--ringcolor=0000003e" \
+        "--linecolor=00000000" "--keyhlcolor=ffffff80" "--ringvercolor=ffffff00" \
+        "--separatorcolor=22222260" "--insidevercolor=ffffff1c" \
+        "--ringwrongcolor=ffffff55" "--insidewrongcolor=ffffff1c")
+else # Bright colors
+    param=("--textcolor=ffffff00" "--insidecolor=ffffff1c" "--ringcolor=ffffff3e" \
+        "--linecolor=ffffff00" "--keyhlcolor=00000080" "--ringvercolor=00000000" \
+        "--separatorcolor=22222260" "--insidevercolor=0000001c" \
+        "--ringwrongcolor=00000055" "--insidewrongcolor=0000001c")
+fi
+
+# If invoked with -d/--desktop, we'll attempt to minimize all windows (ie. show
+# the desktop) before locking.
+${desktop} ${desktop:+-k on}
+
+# try to use i3lock with prepared parameters
+if ! "${i3lock_cmd[@]}" "${param[@]}" >/dev/null 2>&1; then
+    # We have failed, lets get back to stock one
+    "${i3lock_cmd[@]}"
+fi
+
+# As above, if we were passed -d/--desktop, we'll attempt to restore all windows
+# after unlocking.
+${desktop} ${desktop:+-k off}