Improve iteration handling and validate results

src/Hy3Layout.cpp

@@ -390,6 +390,17 @@ void Hy3Layout::recalculateWindow(CWindow* window) {
 	node->recalcSizePosRecursive();
 }
 
+ShiftDirection reverse(ShiftDirection direction) {
+	switch (direction)
+	{
+	case ShiftDirection::Left: return ShiftDirection::Right;
+	case ShiftDirection::Right: return ShiftDirection::Left;
+	case ShiftDirection::Up: return ShiftDirection::Down;
+	case ShiftDirection::Down: return ShiftDirection::Up;
+	default: return direction;
+	}
+}
+
 void Hy3Layout::resizeActiveWindow(const Vector2D& delta, eRectCorner corner, CWindow* pWindow) {
 	auto window = pWindow ? pWindow : g_pCompositor->m_pLastWindow;
 	if (!g_pCompositor->windowValidMapped(window)) return;
@@ -421,11 +432,15 @@ void Hy3Layout::resizeActiveWindow(const Vector2D& delta, eRectCorner corner, CW
 		ShiftDirection target_edge_x;
 		ShiftDirection target_edge_y;
 
-		// Determine the direction in which we're going to look for the sibling node
+		// Determine the direction in which we're going to look for the neighbor node
 		// that will be resized
 		if(corner == CORNER_NONE) {			// It's probably a keyboard event.
 			target_edge_x = display_right ? ShiftDirection::Left : ShiftDirection::Right;
 			target_edge_y = display_bottom ? ShiftDirection::Up : ShiftDirection::Down;
+
+			// If the anchor is not at the top/left then reverse the delta
+			if(target_edge_x == ShiftDirection::Left) resize_delta.x = -resize_delta.x;
+			if(target_edge_y == ShiftDirection::Up) resize_delta.y = -resize_delta.y;
 		} else {							// It's probably a mouse event
 			// Resize against the edges corresponding to the selected corner
 			target_edge_x = corner == CORNER_TOPLEFT || corner == CORNER_BOTTOMLEFT
@@ -434,25 +449,32 @@ void Hy3Layout::resizeActiveWindow(const Vector2D& delta, eRectCorner corner, CW
 				? ShiftDirection::Up : ShiftDirection::Down;
 		}
 
-		auto sibling_node_x = node->findSibling(target_edge_x);
-		auto sibling_node_y = node->findSibling(target_edge_y);
+		// Find the neighboring node in each axis, which will be either above or at the
+		// same level as the initiating node in the layout hierarchy.  These are the nodes
+		// which must get resized (rather than the initiator) because they are the
+		// highest point in the hierarchy
+		auto horizontal_neighbor = node->findNeighbor(target_edge_x);
+		auto vertical_neighbor = node->findNeighbor(target_edge_y);
 
-		if(sibling_node_x) {
-			sibling_node_x->resize(resize_delta.x, target_edge_x);
+		const auto animate =
+			&g_pConfigManager->getConfigValuePtr("misc:animate_manual_resizes")->intValue;
+
+		// Note that the resize direction is reversed, because from the neighbor's perspective
+		// the edge to be moved is the opposite way round.  However, the delta is still the same.
+		if(horizontal_neighbor) {
+			horizontal_neighbor->resize(reverse(target_edge_x), resize_delta.x, *animate == 0);
 		}
 
-		if(sibling_node_y) {
-			sibling_node_y->resize(resize_delta.y, target_edge_y);
+		if(vertical_neighbor) {
+			vertical_neighbor->resize(reverse(target_edge_y), resize_delta.y, *animate == 0);
 		}
-	} else {
+	} else if(window->m_bIsFloating) {
 		// No parent node - is this a floating window?  If so, use the same logic as the `main` layout
-		if(window->m_bIsFloating) {
-			const auto required_size = Vector2D(
-				std::max((window->m_vRealSize.goalv() + delta).x, 20.0),
-				std::max((window->m_vRealSize.goalv() + delta).y, 20.0)
-			);
-			window->m_vRealSize = required_size;
-		}
+		const auto required_size = Vector2D(
+			std::max((window->m_vRealSize.goalv() + delta).x, 20.0),
+			std::max((window->m_vRealSize.goalv() + delta).y, 20.0)
+		);
+		window->m_vRealSize = required_size;
 	}
 }
 

src/Hy3Node.cpp

@@ -7,7 +7,7 @@
 #include "Hy3Node.hpp"
 #include "globals.hpp"
 
-const float MIN_RATIO = 0.02f;
+const float MIN_WINDOW_SIZE = 20;
 
 // Hy3GroupData //
 
@@ -879,7 +879,7 @@ Axis getAxis(ShiftDirection direction) {
 	}
 }
 
-Hy3Node* Hy3Node::findSibling(ShiftDirection direction) {
+Hy3Node* Hy3Node::findNeighbor(ShiftDirection direction) {
 	auto current_node = this;
 	Hy3Node* sibling = nullptr;
 
@@ -901,40 +901,57 @@ Hy3Node* Hy3Node::findSibling(ShiftDirection direction) {
 	return sibling;
 }
 
+int directionToIteratorIncrement(ShiftDirection direction) {
+	switch (direction)
+	{
+		case ShiftDirection::Left:
+		case ShiftDirection::Up:
+			return -1;
+		case ShiftDirection::Right:
+		case ShiftDirection::Down:
+			return 1;
+		default:
+			hy3_log(WARN, "Unknown ShiftDirection enum value: {}", (int)direction);
+			return 1;
+	}
+}
+
 void Hy3Node::resize(
-	double resize_delta,
-	ShiftDirection target_edge_x
+	ShiftDirection direction,
+	double delta,
+	bool no_animation
 ) {
 	auto& parent_node = this->parent;
 	auto& containing_group = parent_node->data.as_group;
-	const auto animate =
-		&g_pConfigManager->getConfigValuePtr("misc:animate_manual_resizes")->intValue;
 
-	if(containing_group.layout != Hy3GroupLayout::Tabbed && getAxis(target_edge_x) == getAxis(containing_group.layout)) {
-		double parent_size = getAxis(target_edge_x) == Axis::Horizontal ? parent_node->size.x
+	if(containing_group.layout != Hy3GroupLayout::Tabbed && getAxis(direction) == getAxis(containing_group.layout)) {
+		double parent_size = getAxis(direction) == Axis::Horizontal ? parent_node->size.x
 																		 : parent_node->size.y;
-		auto ratio_mod = resize_delta * (float) containing_group.children.size() / parent_size;
+		auto ratio_mod = delta * (float) containing_group.children.size() / parent_size;
 
-		auto iter = std::find(containing_group.children.begin(), containing_group.children.end(), this);
+		const auto end_of_children = containing_group.children.end();
+		auto iter = std::find(containing_group.children.begin(), end_of_children, this);
 
-		if (target_edge_x == ShiftDirection::Left || target_edge_x == ShiftDirection::Up) {
-			if (this != containing_group.children.back()) {
-				iter = std::next(iter);
+		if(iter != end_of_children) {
+			const auto outermost_node_in_group = getOuterChild(containing_group, direction);
+			if(this != outermost_node_in_group) {
+				auto inc = directionToIteratorIncrement(direction);
+				iter = std::next(iter, inc);
+				ratio_mod *= inc;
 			}
-		} else {
-			if (this != containing_group.children.front()) {
-				iter = std::prev(iter);
-				ratio_mod = -ratio_mod;
+
+			if(iter != end_of_children) {
+				auto* neighbor = *iter;
+				auto requested_size_ratio = this->size_ratio + ratio_mod;
+				auto requested_neighbor_size_ratio = neighbor->size_ratio -ratio_mod;
+
+				if(requested_size_ratio * parent_size >= MIN_WINDOW_SIZE) {
+					this->size_ratio = requested_size_ratio;
+					neighbor->size_ratio = requested_neighbor_size_ratio;
+					parent_node->recalcSizePosRecursive(no_animation);
+				}
 			}
 		}
-
-		auto* neighbor = *iter;
-
-		if(this->size_ratio + ratio_mod > MIN_RATIO && neighbor->size_ratio - ratio_mod > MIN_RATIO) {
-			this->size_ratio += ratio_mod;
-			neighbor->size_ratio -= ratio_mod;
-			parent_node->recalcSizePosRecursive(*animate == 0);
-		}
 	}
 }
 

src/Hy3Node.hpp

@@ -99,9 +99,9 @@ struct Hy3Node {
 	void markFocused();
 	void raiseToTop();
 	Hy3Node* getFocusedNode(bool ignore_group_focus = false, bool stop_at_expanded = false);
-	Hy3Node* findSibling(ShiftDirection);
+	Hy3Node* findNeighbor(ShiftDirection);
 	Hy3Node* getImmediateSibling(ShiftDirection);
-	void resize(double, ShiftDirection);
+	void resize(ShiftDirection, double, bool no_animation = false);
 	bool isIndirectlyFocused();
 	Hy3Node& getExpandActor();