config: add just-mapped window criteria

toml-spec/spec/spec.generated.json

@@ -1815,6 +1815,10 @@
         "fullscreen": {
           "type": "boolean",
           "description": "Matches if the window is/isn't fullscreen."
+        },
+        "just-mapped": {
+          "type": "boolean",
+          "description": "Matches if the window has/hasn't just been mapped.\n\nThis is true for one iteration of the compositor's main loop immediately after the\nwindow has been mapped.\n"
         }
       },
       "required": []

toml-spec/spec/spec.generated.md

@@ -4064,6 +4064,15 @@ The table has the following fields:
 
   The value of this field should be a boolean.
 
+- `just-mapped` (optional):
+
+  Matches if the window has/hasn't just been mapped.
+  
+  This is true for one iteration of the compositor's main loop immediately after the
+  window has been mapped.
+
+  The value of this field should be a boolean.
+
 
 <a name="types-WindowMatchExactly"></a>
 ### `WindowMatchExactly`

toml-spec/spec/spec.yaml

@@ -3503,6 +3503,14 @@ WindowMatch:
       kind: boolean
       required: false
       description: Matches if the window is/isn't fullscreen.
+    just-mapped:
+      kind: boolean
+      required: false
+      description: |
+        Matches if the window has/hasn't just been mapped.
+       
+        This is true for one iteration of the compositor's main loop immediately after the
+        window has been mapped.
 
 
 WindowMatchExactly: