add

bi/core.js

@@ -16985,8 +16985,8 @@ BI.extend(jQuery, {
     getComboPosition: function (combo, popup, extraWidth, extraHeight, needAdaptHeight, directions, offsetStyle) {
         extraWidth || (extraWidth = 0);
         extraHeight || (extraHeight = 0);
-        var maxHeight = $("body").bounds().height - extraHeight;
-        maxHeight = Math.min(popup.attr("maxHeight") || maxHeight, maxHeight);
+        var bodyHeight = $("body").bounds().height - extraHeight;
+        var maxHeight = Math.min(popup.attr("maxHeight") || bodyHeight, bodyHeight);
         popup.resetHeight && popup.resetHeight(maxHeight);
         var position = $.getComboPositionByDirections(combo, popup, extraWidth, extraHeight, needAdaptHeight, directions || ['bottom', 'top', 'right', 'left']);
         switch (offsetStyle) {
@@ -17009,6 +17009,7 @@ BI.extend(jQuery, {
                 }
                 break;
         }
+        popup.resetHeight && popup.resetHeight(Math.min(bodyHeight - position.top, maxHeight));
         return position;
     }
 });/**

docs/core.js

@@ -22511,8 +22511,8 @@ BI.extend(jQuery, {
     getComboPosition: function (combo, popup, extraWidth, extraHeight, needAdaptHeight, directions, offsetStyle) {
         extraWidth || (extraWidth = 0);
         extraHeight || (extraHeight = 0);
-        var maxHeight = $("body").bounds().height - extraHeight;
-        maxHeight = Math.min(popup.attr("maxHeight") || maxHeight, maxHeight);
+        var bodyHeight = $("body").bounds().height - extraHeight;
+        var maxHeight = Math.min(popup.attr("maxHeight") || bodyHeight, bodyHeight);
         popup.resetHeight && popup.resetHeight(maxHeight);
         var position = $.getComboPositionByDirections(combo, popup, extraWidth, extraHeight, needAdaptHeight, directions || ['bottom', 'top', 'right', 'left']);
         switch (offsetStyle) {
@@ -22535,6 +22535,7 @@ BI.extend(jQuery, {
                 }
                 break;
         }
+        popup.resetHeight && popup.resetHeight(Math.min(bodyHeight - position.top, maxHeight));
         return position;
     }
 });/**

src/core/func/dom.js

@@ -553,8 +553,8 @@ BI.extend(jQuery, {
     getComboPosition: function (combo, popup, extraWidth, extraHeight, needAdaptHeight, directions, offsetStyle) {
         extraWidth || (extraWidth = 0);
         extraHeight || (extraHeight = 0);
-        var maxHeight = $("body").bounds().height - extraHeight;
-        maxHeight = Math.min(popup.attr("maxHeight") || maxHeight, maxHeight);
+        var bodyHeight = $("body").bounds().height - extraHeight;
+        var maxHeight = Math.min(popup.attr("maxHeight") || bodyHeight, bodyHeight);
         popup.resetHeight && popup.resetHeight(maxHeight);
         var position = $.getComboPositionByDirections(combo, popup, extraWidth, extraHeight, needAdaptHeight, directions || ['bottom', 'top', 'right', 'left']);
         switch (offsetStyle) {
@@ -577,6 +577,7 @@ BI.extend(jQuery, {
                 }
                 break;
         }
+        popup.resetHeight && popup.resetHeight(Math.min(bodyHeight - position.top, maxHeight));
         return position;
     }
 });