add toggle focus between floating and tiled layers

Adds focus_floats(), toggle_focus_float_tiled(), and their IPC
bindings so users can bind a key to swap focus between the floating
and tiled layers.

toml-config/src/config.rs

@@ -83,6 +83,7 @@ pub enum SimpleCommand {
     FocusHistory(Timeline),
     FocusLayerRel(LayerDirection),
     FocusTiles,
+    ToggleFocusFloatTiled,
     CreateMark,
     JumpToMark,
     PopMode(bool),

toml-config/src/config/parsers/action.rs

@@ -158,6 +158,7 @@ impl ActionParser<'_> {
             "focus-below" => FocusLayerRel(LayerDirection::Below),
             "focus-above" => FocusLayerRel(LayerDirection::Above),
             "focus-tiles" => FocusTiles,
+            "toggle-float-focus" => ToggleFocusFloatTiled,
             "create-mark" => CreateMark,
             "jump-to-mark" => JumpToMark,
             "clear-modes" => PopMode(false),

toml-config/src/lib.rs

@@ -218,6 +218,10 @@ impl Action {
                     let persistent = state.persistent.clone();
                     b.new(move || persistent.seat.focus_tiles())
                 }
+                SimpleCommand::ToggleFocusFloatTiled => {
+                    let persistent = state.persistent.clone();
+                    b.new(move || persistent.seat.toggle_focus_float_tiled())
+                }
                 SimpleCommand::CreateMark => {
                     let persistent = state.persistent.clone();
                     b.new(move || persistent.seat.create_mark(None))