contrib: add active window opacities.

contrib/inactive-windows-transparency.py

@@ -7,15 +7,27 @@
 
 import argparse
 import i3ipc
+import json
 import signal
 import sys
 from functools import partial
 
-def ignored(window):
-    global ignore
-    return window.app_id in ignore
 
-def on_window_focus(inactive_opacity, ipc, event):
+class Opts:
+    def __init__(self, args):
+        self.ignore = args.ignore
+        self.active_opacities = json.loads(args.active_opacities)
+        self.inactive_opacity = args.opacity
+
+
+def set_focused_opacity(window, opts):
+    opacity = opts.active_opacities.get(window.app_id, 1)
+    cmd = "opacity {}".format(opacity)
+    window.command(cmd)
+    return
+
+
+def on_window_focus(opts, ipc, event):
     global prev_focused
     global prev_workspace
 
@@ -28,10 +40,10 @@ def on_window_focus(inactive_opacity, ipc, event):
     workspace = focused_workspace.workspace().num
 
     if focused.id != prev_focused.id:  # https://github.com/swaywm/sway/issues/2859
-        focused.command("opacity 1")
+        set_focused_opacity(focused, opts);
         if workspace == prev_workspace:
-            if not ignored(prev_focused):
+            if not window.app_id in opts.ignore:
-                prev_focused.command("opacity " + inactive_opacity)
+                prev_focused.command("opacity " + opts.inactive_opacity)
                 prev_focused = focused
                 prev_workspace = workspace
 
@@ -57,6 +69,13 @@ if __name__ == "__main__":
         default=transparency_val,
         help="set opacity value in range 0...1",
     )
+    parser.add_argument(
+        "--active-opacities",
+        "-a",
+        type=str,
+        default="{}",
+        help="A dictionary of applications and their active opacities."
+    )
     parser.add_argument(
         "--ignore",
         "-i",
@@ -66,7 +85,7 @@ if __name__ == "__main__":
         nargs="+"
     )
     args = parser.parse_args()
-    ignore = args.ignore
+    opts = Opts(args)
 
     ipc = i3ipc.Connection()
     prev_focused = None
@@ -75,9 +94,9 @@ if __name__ == "__main__":
     for window in ipc.get_tree():
         if window.focused:
             prev_focused = window
-        elif not ignored(window):
+        elif not window.app_id in opts.ignore:
             window.command("opacity " + args.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.opacity))
+        ipc.on("window::focus", partial(on_window_focus, opts))
         ipc.main()