Add autotiling support

README.md

@@ -11,6 +11,7 @@ i3 / sway like layout for [hyprland](https://github.com/hyprwm/hyprland).
 - [x] i3 like tiling
 - [x] Node based window manipulation (you can interact with multiple windows at once)
 - [x] Greatly improved tabbed node groups over base hyprland
+- [x] Optional autotiling
 
 Additional features may be suggested in the repo issues or the [matrix room](https://matrix.to/#/#hy3:outfoxxed.me).
 
@@ -184,6 +185,27 @@ plugin {
       # inactive tab bar text color
       col.text.inactive = <color>
     }
+
+    # autotiling settings
+    autotile {
+      # enable autotile
+      enable = <bool>
+
+      # make autotile-created groups ephemeral
+      ephemeral_groups = <bool>
+
+      # if a window would be squished smaller than this width, a vertical split will be created
+      # -1 = never automatically split vertically
+      # 0 = always automatically split vertically
+      # <number> = pixel height to split at
+      trigger_width = <int>
+
+      # if a window would be squished smaller than this height, a horizontal split will be created
+      # -1 = never automatically split horizontally
+      # 0 = always automatically split horizontally
+      # <number> = pixel height to split at
+      trigger_height = <int>
+    }
   }
 }
 ```

src/Hy3Layout.cpp

@@ -154,6 +154,34 @@ void Hy3Layout::onWindowCreatedTiling(CWindow* window) {
 		);
 	}
 
+	{
+		// clang-format off
+		static const auto* at_enable = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:enable")->intValue;
+		static const auto* at_ephemeral = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:ephemeral_groups")->intValue;
+		static const auto* at_trigger_width = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:trigger_width")->intValue;
+		static const auto* at_trigger_height = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:trigger_height")->intValue;
+		// clang-format on
+
+		auto& target_group = opening_into->data.as_group;
+		if (*at_enable && opening_after != nullptr && target_group.children.size() > 1
+		    && target_group.layout != Hy3GroupLayout::Tabbed)
+		{
+			auto is_horizontal = target_group.layout == Hy3GroupLayout::SplitH;
+			auto trigger = is_horizontal ? *at_trigger_width : *at_trigger_height;
+			auto target_size = is_horizontal ? opening_into->size.x : opening_into->size.y;
+			auto size_after_addition = target_size / (target_group.children.size() + 1);
+
+			if (trigger >= 0 && (trigger == 0 || size_after_addition < trigger)) {
+				auto opening_after1 = opening_after->intoGroup(
+				    is_horizontal ? Hy3GroupLayout::SplitV : Hy3GroupLayout::SplitH,
+				    *at_ephemeral ? GroupEphemeralityOption::Ephemeral : GroupEphemeralityOption::Standard
+				);
+				opening_into = opening_after;
+				opening_after = opening_after1;
+			}
+		}
+	}
+
 	this->nodes.push_back({
 	    .parent = opening_into,
 	    .data = window,

src/main.cpp

@@ -38,6 +38,12 @@ APICALL EXPORT PLUGIN_DESCRIPTION_INFO PLUGIN_INIT(HANDLE handle) {
 	CONF("tabs:col.text.urgent", int, 0xff000000);
 	CONF("tabs:col.text.inactive", int, 0xff000000);
 
+	// autotiling
+	CONF("autotile:enable", int, 0);
+	CONF("autotile:ephemeral_groups", int, 1);
+	CONF("autotile:trigger_height", int, 0);
+	CONF("autotile:trigger_width", int, 0);
+
 #undef CONF
 
 	g_Hy3Layout = std::make_unique<Hy3Layout>();