From 5a8412dd23d1632b4ea7ff90635f3f2ec84f30b0 Mon Sep 17 00:00:00 2001
From: SmallJoker <SmallJoker@users.noreply.github.com>
Date: Fri, 6 Dec 2024 21:59:51 +0100
Subject: [PATCH] Formspec: Move tooltip above cursor when lacking space
 (#15470)

---
 src/gui/guiFormSpecMenu.cpp | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/gui/guiFormSpecMenu.cpp b/src/gui/guiFormSpecMenu.cpp
index 2330f7c32..8a69f0429 100644
--- a/src/gui/guiFormSpecMenu.cpp
+++ b/src/gui/guiFormSpecMenu.cpp
@@ -3610,10 +3610,25 @@ void GUIFormSpecMenu::showTooltip(const std::wstring &text,
 	// Calculate and set the tooltip position
 	s32 tooltip_x = m_pointer.X + tooltip_offset_x;
 	s32 tooltip_y = m_pointer.Y + tooltip_offset_y;
-	if (tooltip_x + tooltip_width > (s32)screenSize.X)
-		tooltip_x = (s32)screenSize.X - tooltip_width  - m_btn_height;
-	if (tooltip_y + tooltip_height > (s32)screenSize.Y)
-		tooltip_y = (s32)screenSize.Y - tooltip_height - m_btn_height;
+	// Bottom/Left limited positions (if the tooltip is too far out)
+	s32 tooltip_x_alt = (s32)screenSize.X - tooltip_width  - m_btn_height;
+	s32 tooltip_y_alt = (s32)screenSize.Y - tooltip_height - m_btn_height;
+
+	int collision = (tooltip_x_alt < tooltip_x) + 2 * (tooltip_y_alt < tooltip_y);
+	switch (collision) {
+	case 1: // x
+		tooltip_x = tooltip_x_alt;
+		break;
+	case 2: // y
+		tooltip_y = tooltip_y_alt;
+		break;
+	case 3: // both
+		tooltip_x = tooltip_x_alt;
+		tooltip_y = (s32)screenSize.Y - 2 * tooltip_height - m_btn_height;
+		break;
+	default: // OK
+		break;
+	}
 
 	m_tooltip_element->setRelativePosition(
 		core::rect<s32>(