Add ephemeral groups

README.md

@@ -90,7 +90,9 @@ plugin {
 ```
 
 ### Dispatcher list
- - `hy3:makegroup, <h | v | opposite | tab>` - make a vertical / horizontal split or tab group
+ - `hy3:makegroup, <h | v | opposite | tab>, [ephemeral | force_ephemeral]` - make a vertical / horizontal split or tab group
+   - `ephemeral` - the group will be removed once it contains only one node. does not affect existing groups.
+   - `force_ephemeral` - same as ephemeral, but converts existing single windows groups.
  - `hy3:movefocus, <l | u | d | r | left | down | up | right>, [visible]` - move the focus left, up, down, or right
    - `visible` - only move between visible nodes, not hidden tabs
  - `hy3:movewindow, <l | u | d | r | left | down | up | right>, [once]` - move a window left, up, down, or right

flake.lock

@@ -8,11 +8,11 @@
         "xdph": "xdph"
       },
       "locked": {
-        "lastModified": 1689264334,
-        "narHash": "sha256-CJv3Qi00et2dFBWXTx9ysYdYauFtxxs+3pXr0gq/UX0=",
+        "lastModified": 1689720698,
+        "narHash": "sha256-DjW5GZlzULXKdEVag13OEV3/hog1k/5ZjSIRIPOHrcQ=",
         "owner": "hyprwm",
         "repo": "Hyprland",
-        "rev": "f8def68e7e761e33dd51c197ac89194a51fcb60f",
+        "rev": "81f4a4f47182c15ee9436d9ab7b2e425a096ce5b",
         "type": "github"
       },
       "original": {
@@ -67,11 +67,11 @@
       "flake": false,
       "locked": {
         "host": "gitlab.freedesktop.org",
-        "lastModified": 1686753331,
-        "narHash": "sha256-KovjVFwcuoUO0eu/UiWrnD3+m/K+SHSAVIz4xF9K1XA=",
+        "lastModified": 1689611045,
+        "narHash": "sha256-3RTOlQabkNetQ4O4UzSf57JPco9VGVHhSU1ls5uKBeE=",
         "owner": "wlroots",
         "repo": "wlroots",
-        "rev": "7e7633abf09b362d0bad9e3fc650fd692369291d",
+        "rev": "7791ffe0584c4ac13c170e1661ce33bdbd4a9b9e",
         "type": "gitlab"
       },
       "original": {

src/Hy3Layout.cpp

@@ -44,7 +44,8 @@ void Hy3Layout::onWindowCreatedTiling(CWindow* window) {
 
 			// opening_after->parent cannot be nullptr
 			if (opening_after == root) {
-				opening_after = opening_after->intoGroup(Hy3GroupLayout::SplitH);
+				opening_after
+				    = opening_after->intoGroup(Hy3GroupLayout::SplitH, GroupEphemeralityOption::Standard);
 			}
 		}
 	}
@@ -158,11 +159,13 @@ void Hy3Layout::onWindowRemovedTiling(CWindow* window) {
 	auto* parent = node->removeFromParentRecursive();
 	this->nodes.remove(*node);
 
+	auto& group = parent->data.as_group;
+
 	if (parent != nullptr) {
 		parent->recalcSizePosRecursive();
 
-		if (parent->data.as_group.children.size() == 1
-		    && parent->data.as_group.children.front()->data.type == Hy3NodeType::Group)
+		if (group.children.size() == 1
+		    && (group.ephemeral || group.children.front()->data.type == Hy3NodeType::Group))
 		{
 			auto* target_parent = parent;
 			while (target_parent != nullptr && Hy3Node::swallowGroups(target_parent)) {
@@ -633,36 +636,47 @@ void Hy3Layout::onDisable() {
 	this->nodes.clear();
 }
 
-void Hy3Layout::makeGroupOnWorkspace(int workspace, Hy3GroupLayout layout) {
+void Hy3Layout::makeGroupOnWorkspace(
+    int workspace,
+    Hy3GroupLayout layout,
+    GroupEphemeralityOption ephemeral
+) {
 	auto* node = this->getWorkspaceFocusedNode(workspace);
-	this->makeGroupOn(node, layout);
+	this->makeGroupOn(node, layout, ephemeral);
 }
 
-void Hy3Layout::makeOppositeGroupOnWorkspace(int workspace) {
+void Hy3Layout::makeOppositeGroupOnWorkspace(int workspace, GroupEphemeralityOption ephemeral) {
 	auto* node = this->getWorkspaceFocusedNode(workspace);
-	this->makeOppositeGroupOn(node);
+	this->makeOppositeGroupOn(node, ephemeral);
 }
 
-void Hy3Layout::makeGroupOn(Hy3Node* node, Hy3GroupLayout layout) {
+void Hy3Layout::makeGroupOn(
+    Hy3Node* node,
+    Hy3GroupLayout layout,
+    GroupEphemeralityOption ephemeral
+) {
 	if (node == nullptr) return;
 
 	if (node->parent != nullptr) {
 		auto& group = node->parent->data.as_group;
 		if (group.children.size() == 1) {
 			group.layout = layout;
+			group.ephemeral = ephemeral == GroupEphemeralityOption::ForceEphemeral ? true
+			                : ephemeral == GroupEphemeralityOption::Ephemeral      ? group.ephemeral
+			                                                                       : false;
 			node->parent->recalcSizePosRecursive();
 			return;
 		}
 	}
 
-	node->intoGroup(layout);
+	node->intoGroup(layout, ephemeral);
 }
 
-void Hy3Layout::makeOppositeGroupOn(Hy3Node* node) {
+void Hy3Layout::makeOppositeGroupOn(Hy3Node* node, GroupEphemeralityOption ephemeral) {
 	if (node == nullptr) return;
 
 	if (node->parent == nullptr) {
-		node->intoGroup(Hy3GroupLayout::SplitH);
+		node->intoGroup(Hy3GroupLayout::SplitH, ephemeral);
 	} else {
 		auto& group = node->parent->data.as_group;
 		auto layout
@@ -670,9 +684,12 @@ void Hy3Layout::makeOppositeGroupOn(Hy3Node* node) {
 
 		if (group.children.size() == 1) {
 			group.layout = layout;
+			group.ephemeral = ephemeral == GroupEphemeralityOption::ForceEphemeral ? true
+			                : ephemeral == GroupEphemeralityOption::Ephemeral      ? group.ephemeral
+			                                                                       : false;
 			node->parent->recalcSizePosRecursive();
 		} else {
-			node->intoGroup(layout);
+			node->intoGroup(layout, ephemeral);
 		}
 	}
 }
@@ -1336,7 +1353,15 @@ Hy3Node* Hy3Layout::shiftOrGetFocus(
 		node.parent = target_group;
 		node.size_ratio = 1.0;
 
-		if (old_parent != nullptr) old_parent->recalcSizePosRecursive();
+		if (old_parent != nullptr) {
+			auto& group = old_parent->data.as_group;
+			if (old_parent->parent != nullptr && group.ephemeral && group.children.size() == 1) {
+				Hy3Node::swallowGroups(old_parent);
+			}
+
+			old_parent->recalcSizePosRecursive();
+		}
+
 		target_group->recalcSizePosRecursive();
 
 		auto* target_parent = target_group->parent;

src/Hy3Layout.hpp

@@ -2,6 +2,12 @@
 
 class Hy3Layout;
 
+enum class GroupEphemeralityOption {
+	Ephemeral,
+	Standard,
+	ForceEphemeral,
+};
+
 #include <list>
 
 #include <hyprland/src/layout/IHyprLayout.hpp>
@@ -60,10 +66,10 @@ public:
 	virtual void onEnable();
 	virtual void onDisable();
 
-	void makeGroupOnWorkspace(int workspace, Hy3GroupLayout);
-	void makeOppositeGroupOnWorkspace(int workspace);
-	void makeGroupOn(Hy3Node*, Hy3GroupLayout);
-	void makeOppositeGroupOn(Hy3Node*);
+	void makeGroupOnWorkspace(int workspace, Hy3GroupLayout, GroupEphemeralityOption);
+	void makeOppositeGroupOnWorkspace(int workspace, GroupEphemeralityOption);
+	void makeGroupOn(Hy3Node*, Hy3GroupLayout, GroupEphemeralityOption);
+	void makeOppositeGroupOn(Hy3Node*, GroupEphemeralityOption);
 	void shiftWindow(int workspace, ShiftDirection, bool once);
 	void shiftFocus(int workspace, ShiftDirection, bool visible);
 	void changeFocus(int workspace, FocusShift);

src/Hy3Node.cpp

@@ -620,7 +620,7 @@ Hy3Node* Hy3Node::removeFromParentRecursive() {
 	return parent;
 }
 
-Hy3Node* Hy3Node::intoGroup(Hy3GroupLayout layout) {
+Hy3Node* Hy3Node::intoGroup(Hy3GroupLayout layout, GroupEphemeralityOption ephemeral) {
 	this->layout->nodes.push_back({
 	    .parent = this,
 	    .data = layout,
@@ -635,6 +635,8 @@ Hy3Node* Hy3Node::intoGroup(Hy3GroupLayout layout) {
 	this->data.as_group.children.push_back(node);
 	this->data.as_group.group_focused = false;
 	this->data.as_group.focused_child = node;
+	this->data.as_group.ephemeral = ephemeral == GroupEphemeralityOption::Ephemeral
+	                             || ephemeral == GroupEphemeralityOption::ForceEphemeral;
 	this->recalcSizePosRecursive();
 	this->updateTabBarRecursive();
 

src/Hy3Node.hpp

@@ -26,6 +26,7 @@ struct Hy3GroupData {
 	std::list<Hy3Node*> children;
 	bool group_focused = true;
 	Hy3Node* focused_child = nullptr;
+	bool ephemeral = false;
 	Hy3TabGroup* tab_bar = nullptr;
 
 	Hy3GroupData(Hy3GroupLayout layout);
@@ -104,7 +105,7 @@ struct Hy3Node {
 	Hy3Node* removeFromParentRecursive();
 
 	// Replace this node with a group, returning this node's new address.
-	Hy3Node* intoGroup(Hy3GroupLayout);
+	Hy3Node* intoGroup(Hy3GroupLayout, GroupEphemeralityOption);
 
 	// Attempt to swallow a group. returns true if swallowed
 	static bool swallowGroups(Hy3Node* into);

src/dispatchers.cpp

@@ -19,18 +19,27 @@ int workspace_for_action() {
 	return workspace_id;
 }
 
-void dispatch_makegroup(std::string arg) {
+void dispatch_makegroup(std::string value) {
 	int workspace = workspace_for_action();
 	if (workspace == -1) return;
 
-	if (arg == "h") {
-		g_Hy3Layout->makeGroupOnWorkspace(workspace, Hy3GroupLayout::SplitH);
-	} else if (arg == "v") {
-		g_Hy3Layout->makeGroupOnWorkspace(workspace, Hy3GroupLayout::SplitV);
-	} else if (arg == "tab") {
-		g_Hy3Layout->makeGroupOnWorkspace(workspace, Hy3GroupLayout::Tabbed);
-	} else if (arg == "opposite") {
-		g_Hy3Layout->makeOppositeGroupOnWorkspace(workspace);
+	auto args = CVarList(value);
+
+	GroupEphemeralityOption ephemeral = GroupEphemeralityOption::Standard;
+	if (args[1] == "ephemeral") {
+		ephemeral = GroupEphemeralityOption::Ephemeral;
+	} else if (args[1] == "force_ephemeral") {
+		ephemeral = GroupEphemeralityOption::ForceEphemeral;
+	}
+
+	if (args[0] == "h") {
+		g_Hy3Layout->makeGroupOnWorkspace(workspace, Hy3GroupLayout::SplitH, ephemeral);
+	} else if (args[0] == "v") {
+		g_Hy3Layout->makeGroupOnWorkspace(workspace, Hy3GroupLayout::SplitV, ephemeral);
+	} else if (args[0] == "tab") {
+		g_Hy3Layout->makeGroupOnWorkspace(workspace, Hy3GroupLayout::Tabbed, ephemeral);
+	} else if (args[0] == "opposite") {
+		g_Hy3Layout->makeOppositeGroupOnWorkspace(workspace, ephemeral);
 	}
 }