From 0b1e3f2cf5b6d857396dd2d31d3b02b4ee32f377 Mon Sep 17 00:00:00 2001
From: ztplz <mysticzt@gmail.com>
Date: Sun, 17 Feb 2019 16:50:34 +0800
Subject: [PATCH] Recheck points after dom-align adjustment

---
 src/Align.jsx | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/Align.jsx b/src/Align.jsx
index 2305652..9c23311 100644
--- a/src/Align.jsx
+++ b/src/Align.jsx
@@ -145,6 +145,37 @@ class Align extends Component {
 
       restoreFocus(activeElement, source);
 
+      // get correct points
+      // in dom-align, points will be reset after failed match
+      // https://github.com/ant-design/ant-design/issues/14582
+      if (result.overflow.adjustX || result.overflow.adjustY) {
+        const sourceOffset = source.getBoundingClientRect();
+        const targetOffset = element.getBoundingClientRect();
+        const sourceCenter = {
+          left: sourceOffset.left + sourceOffset.width / 2,
+          top: sourceOffset.top + sourceOffset.height / 2,
+        };
+        const targetCenter = {
+          left: targetOffset.left + targetOffset.width / 2,
+          top: targetOffset.top + targetOffset.height / 2,
+        }
+        const ratio = (sourceCenter.left - targetCenter.left) / (sourceCenter.top - targetCenter.top);
+        if (ratio >= -1 || ratio <= 1) {
+          if (sourceCenter.top < targetCenter.top) {
+            result.points = ["bc", "tc"];
+          } else {
+            result.points = ["tc", "bc"];
+          }
+        } else {
+          /* eslint-disable-next-line */
+          if (sourceCenter.left < targetCenter.left) {
+            result.points = ["rc", "lc"];
+          } else {
+            result.points = ["lc", "rc"];
+          }
+        }
+      }
+
       if (onAlign) {
         onAlign(source, result);
       }