From 25117de9d3b55461b3fe0f2cdc37356ffcc12b0c Mon Sep 17 00:00:00 2001
From: zsmj <dailer@fanruan.com>
Date: Fri, 23 Dec 2022 10:39:02 +0800
Subject: [PATCH] =?UTF-8?q?BI-119128=20fix:=20=E3=80=90=E8=87=AA=E9=80=82?=
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上下空间都不够的时候场景。
另外高度自适应fixed元素导致滚动问题还需探索一下
---
 src/core/platform/web/dom.js | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/src/core/platform/web/dom.js b/src/core/platform/web/dom.js
index ef1989c8a..945aa359a 100644
--- a/src/core/platform/web/dom.js
+++ b/src/core/platform/web/dom.js
@@ -416,27 +416,28 @@
             };
         },
 
-        getBottomAdaptPosition: function (combo, popup, extraHeight, needAdaptHeight) {
+        getBottomAdaptPosition: function (combo, popup, extraHeight, needAdaptHeight, positionRelativeElement) {
             var comboBounds = combo.element[0].getBoundingClientRect(),
                 popupBounds = popup.element[0].getBoundingClientRect(),
-                windowBounds = BI.Widget._renderEngine.createElement("body").bounds();
+                viewportBounds = document.documentElement.getBoundingClientRect(),
+                positionRelativeElementRect = positionRelativeElement.getBoundingClientRect();
             if (BI.DOM.isBottomSpaceEnough(combo, popup, extraHeight)) {
-                return BI.DOM.getBottomPosition(combo, popup, extraHeight);
+                return BI.DOM.getBottomPosition(combo, popup, extraHeight, positionRelativeElement);
             }
             if (needAdaptHeight) {
                 return {
-                    top: comboBounds.top + comboBounds.height + extraHeight,
-                    adaptHeight: windowBounds.height - comboBounds.top - comboBounds.height - extraHeight
+                    top: comboBounds.top + comboBounds.height + extraHeight - positionRelativeElementRect.top,
+                    adaptHeight: viewportBounds.height - comboBounds.top - comboBounds.height - extraHeight
                 };
             }
-            if (popupBounds.height + extraHeight > windowBounds.height) {
+            if (popupBounds.height + extraHeight > viewportBounds.height) {
                 return {
-                    top: extraHeight,
-                    adaptHeight: windowBounds.height - extraHeight
+                    top: extraHeight - positionRelativeElementRect.top,
+                    adaptHeight: viewportBounds.height - extraHeight
                 };
             }
             return {
-                top: windowBounds.height - popupBounds.height - extraHeight
+                top: viewportBounds.height - popupBounds.height - extraHeight - positionRelativeElementRect.top
             };
         },