1 files changed, 54 insertions, 0 deletions
diff --git a/src/main/java/gregtech/nei/NEIHandlerAbsoluteTooltip.java b/src/main/java/gregtech/nei/NEIHandlerAbsoluteTooltip.java
new file mode 100644
index 0000000000..bc1c6b5630
--- /dev/null
+++ b/src/main/java/gregtech/nei/NEIHandlerAbsoluteTooltip.java
@@ -0,0 +1,54 @@
+package gregtech.nei;
+
+import java.awt.Dimension;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.util.List;
+
+import codechicken.lib.gui.GuiDraw;
+
+public class NEIHandlerAbsoluteTooltip {
+
+    private final Rectangle area;
+    private final String tooltip;
+    private Dimension displaySize;
+
+    public NEIHandlerAbsoluteTooltip(String tooltip, Rectangle area) {
+        this.tooltip = tooltip;
+        this.area = area;
+    }
+
+    public void handleTooltip(List<String> currenttip, int recipeIndex) {
+        displaySize = GuiDraw.displaySize();
+        if (shouldAddTooltip(recipeIndex)) {
+            currenttip.add(tooltip);
+        }
+    }
+
+    private boolean shouldAddTooltip(int recipeIndex) {
+        return isPageFirstRecipe(recipeIndex) && mouseInArea();
+    }
+
+    private boolean mouseInArea() {
+        Point mousePos = getRelMouse();
+        return area.contains(mousePos);
+    }
+
+    private Point getRelMouse() {
+        int ySize = Math.min(Math.max(displaySize.height - 68, 166), 370);
+        int guiLeft = (displaySize.width - 176) / 2;
+        int guiTop = (displaySize.height - ySize) / 2 + 10;
+        Point mousePos = GuiDraw.getMousePosition();
+        return new Point(mousePos.x - guiLeft - 5, mousePos.y - guiTop - 38);
+    }
+
+    private boolean isPageFirstRecipe(int recipe) {
+        int actualRecipesPerPage = getActualRecipesPerPage();
+        return actualRecipesPerPage < 2 || recipe % 2 == 0;
+    }
+
+    private int getActualRecipesPerPage() {
+        int ySize = Math.min(Math.max(displaySize.height - 68, 166), 370);
+        return (ySize - (12 * 3)) / 135;
+    }
+}