BI-118849 fix: combo在屏幕边缘,左右位置不够之后的位置调整逻辑

src/core/platform/web/dom.js

@@ -250,12 +250,12 @@
 
         _getLeftAlignPosition: function (combo, popup, extraWidth, container) {
             var comboRect = combo.element[0].getBoundingClientRect(),
-                popupRect = popup.element.bounds(),
+                popupRect = popup.element[0].getBoundingClientRect(),
                 viewportRect = document.documentElement.getBoundingClientRect(),
                 containerRect = container ? container.getBoundingClientRect() : { left: 0 };
             var left = comboRect.left - containerRect.left + extraWidth;
 
-            if (left + popupRect.width - containerRect.left > viewportRect.width) {
+            if (comboRect.left + popupRect.width > viewportRect.width) {
                 left = viewportRect.width - popupRect.width - containerRect.left;
             }
             return left;
@@ -265,12 +265,13 @@
             var left = this._getLeftAlignPosition(combo, popup, extraWidth, container);
             var dir = "";
             // 如果放不下，优先使用RightAlign, 如果RightAlign也放不下, 再使用left=0
-            if (left < 0) {
+            var containerRect = container ? container.getBoundingClientRect() : { left: 0 };
+            if (left + containerRect.left < 0) {
                 left = this._getRightAlignPosition(combo, popup, extraWidth);
                 dir = "left";
             }
-            if (left < 0) {
-                left = 0;
+            if (left + containerRect.left < 0) {
+                left = 0 - containerRect.left;
             }
             return {
                 left: left,
@@ -678,8 +679,8 @@
         getComboPosition: function (combo, popup, extraWidth, extraHeight, needAdaptHeight, directions, offsetStyle, positionRelativeElement) {
             extraWidth || (extraWidth = 0);
             extraHeight || (extraHeight = 0);
-            var bodyHeight = BI.Widget._renderEngine.createElement("body").bounds().height - extraHeight;
-            var maxHeight = Math.min(popup.attr("maxHeight") || bodyHeight, bodyHeight);
+            var viewportBounds = document.documentElement.getBoundingClientRect();
+            var maxHeight = Math.min(popup.attr("maxHeight") || viewportBounds.height, viewportBounds.height);
             popup.resetHeight && popup.resetHeight(maxHeight);
             var position = BI.DOM.getComboPositionByDirections(combo, popup, extraWidth, extraHeight, needAdaptHeight, directions || ["bottom", "top", "right", "left"], positionRelativeElement);
             switch (offsetStyle) {
@@ -703,7 +704,7 @@
                     break;
             }
             if (needAdaptHeight === true) {
-                popup.resetHeight && popup.resetHeight(Math.min(bodyHeight - position.top + (positionRelativeElement ? positionRelativeElement.getBoundingClientRect().top : 0), maxHeight));
+                popup.resetHeight && popup.resetHeight(Math.min(viewportBounds.height - position.top + (positionRelativeElement ? positionRelativeElement.getBoundingClientRect().top : 0), maxHeight));
             }
             return position;
         },