contrib/inactive-windows-transparency: Add opacity overrides

Adds application specific ovverides for both active and inactive window
opacities. Done by using -I / --inactive-overrides or -A /
--active-overrides with the option syntax 'app_id=opactiy_value'.
For example: -A firefox=0.95 kitty=0.7 -I firefox=0.3

contrib/inactive-windows-transparency.py

@@ -7,6 +7,7 @@ import argparse
 import i3ipc
 import signal
 import sys
+import re
 from functools import partial
 
 def on_window_focus(args, ipc, event):
@@ -18,20 +19,23 @@ def on_window_focus(args, ipc, event):
         return
 
     focused = event.container
-
-
     # on_window_focus not called only when focused is changed,
     # but also when a window is moved
     if focused.id != prev_focused.id:
         if prev_focused.app_id in args.ignore:
             prev_focused.command("opacity 1")
+        elif prev_focused.app_id in args.inactive_overrides.keys():
+            prev_focused.command("opacity " + args.inactive_overrides[prev_focused.app_id])
         else:
             prev_focused.command("opacity " + args.inactive_opacity)
 
         if focused.app_id in args.ignore:
             focused.command("opacity 1")
+        elif focused.app_id in args.active_overrides.keys():
+            focused.command("opacity " + args.active_overrides[focused.app_id])
         else: 
             focused.command("opacity " + args.active_opacity)
+
         prev_focused = focused
 
 
@@ -67,6 +71,22 @@ if __name__ == "__main__":
         default=default_active_opacity,
         help="value between 0 and 1 denoting opacity for active windows",
     )
+    parser.add_argument(
+        "--inactive-overrides",
+        "-I",
+        type=str,
+        default=[],
+        help="List of appliations with their values that override the inactive opactity settings. (Example: -A firefox=0.9 kitty=0.8)",
+        nargs="+"
+    )
+    parser.add_argument(
+        "--active-overrides",
+        "-A",
+        type=str,
+        default=[],
+        help="List of appliations with their values that override the active opactity settings. (Example: -A firefox=0.9 kitty=0.8)",
+        nargs="+"
+    )
     parser.add_argument(
         "--ignore",
         type=str,
@@ -76,6 +96,22 @@ if __name__ == "__main__":
     )
     args = parser.parse_args()
 
+    # Convert ovveride arguments of format app_id=opacity_value
+    # to dictionary of format "app_id": "opacity_value"
+    temp_inactive_overrides_dictionary = {}
+    for override in args.inactive_overrides:
+        app_id = re.search('\S*(?==)', override).group(0)
+        opacity_value = re.search('(?<==)\S*', override).group(0)
+        temp_inactive_overrides_dictionary[app_id] = opacity_value
+    args.inactive_overrides = temp_inactive_overrides_dictionary
+
+    temp_active_overrides_dictionary = {}
+    for override in args.active_overrides:
+        app_id = re.search('\S*(?==)', override).group(0)
+        opacity_value = re.search('(?<==)\S*', override).group(0)
+        temp_active_overrides_dictionary[app_id] = opacity_value
+    args.active_overrides = temp_active_overrides_dictionary
+
     ipc = i3ipc.Connection()
     prev_focused = None
 
@@ -84,6 +120,8 @@ if __name__ == "__main__":
             prev_focused = window
         else:
             window.command("opacity " + args.inactive_opacity)
+
+
     for sig in [signal.SIGINT, signal.SIGTERM]:
         signal.signal(sig, lambda signal, frame: remove_opacity(ipc))
     ipc.on("window::focus", partial(on_window_focus, args))