1 files changed, 69 insertions, 0 deletions
diff --git a/dbus-examples/inverter.sh b/dbus-examples/inverter.sh
new file mode 100644
index 0000000..e13cb2d
--- /dev/null
+++ b/dbus-examples/inverter.sh
@@ -0,0 +1,69 @@
+#!/bin/sh
+
+# == Declare stderr function ===
+
+stderr() {
+  printf "\033[1;31m%s\n\033[0m" "$@" >&2
+}
+
+# === Verify `picom --dbus` status ===
+
+if [ -z "$(dbus-send --session --dest=org.freedesktop.DBus --type=method_call --print-reply /org/freedesktop/DBus org.freedesktop.DBus.ListNames | grep compton)" ]; then
+  stderr "picom DBus interface unavailable"
+  if [ -n "$(pgrep picom)" ]; then
+    stderr "picom running without dbus interface"
+    #killall picom & # Causes all windows to flicker away and come back ugly.
+    #picom --dbus & # Causes all windows to flicker away and come back beautiful
+  else
+    stderr "picom not running"
+  fi
+  exit 1
+fi
+
+# === Setup sed ===
+
+SED="${SED:-$(command -v gsed || printf 'sed')}"
+
+# === Get connection parameters ===
+
+dpy=$(printf "$DISPLAY" | tr -c '[:alnum:]' _)
+
+if [ -z "$dpy" ]; then
+  stderr "Cannot find display."
+  exit 1
+fi
+
+service="com.github.chjj.compton.${dpy}"
+interface="com.github.chjj.compton"
+picom_dbus="dbus-send --print-reply --dest="${service}" / "${interface}"."
+type_win='uint32'
+type_enum='uint32'
+
+# === Color Inversion ===
+
+# Get window ID of window to invert
+if [ -z "$1" -o "$1" = "selected" ]; then
+  window=$(xwininfo -frame | sed -n 's/^xwininfo: Window id: \(0x[[:xdigit:]][[:xdigit:]]*\).*/\1/p') # Select window by mouse
+elif [ "$1" = "focused" ]; then
+  # Ensure we are tracking focus
+  window=$(${picom_dbus}find_win string:focused | $SED -n 's/^[[:space:]]*'${type_win}'[[:space:]]*\([[:digit:]]*\).*/\1/p') # Query picom for the active window
+elif echo "$1" | grep -Eiq '^([[:digit:]][[:digit:]]*|0x[[:xdigit:]][[:xdigit:]]*)$'; then
+  window="$1" # Accept user-specified window-id if the format is correct
+else
+  echo "$0" "[ selected | focused | window-id ]"
+fi
+
+# Color invert the selected or focused window
+if [ -n "$window" ]; then
+  invert_status="$(${picom_dbus}win_get "${type_win}:${window}" string:invert_color | $SED -n 's/^[[:space:]]*boolean[[:space:]]*\([[:alpha:]]*\).*/\1/p')"
+  if [ "$invert_status" = true ]; then
+    invert=0 # Set the window to have normal color
+  else
+    invert=1 # Set the window to have inverted color
+  fi
+  ${picom_dbus}win_set "${type_win}:${window}" string:invert_color_force "${type_enum}:${invert}" &
+else
+  stderr "Cannot find $1 window."
+  exit 1
+fi
+exit 0