1 files changed, 58 insertions, 0 deletions
diff --git a/popperjs/package/lib/dom-utils/getCompositeRect.js b/popperjs/package/lib/dom-utils/getCompositeRect.js
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+++ b/popperjs/package/lib/dom-utils/getCompositeRect.js
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+import getBoundingClientRect from "./getBoundingClientRect.js";
+import getNodeScroll from "./getNodeScroll.js";
+import getNodeName from "./getNodeName.js";
+import { isHTMLElement } from "./instanceOf.js";
+import getWindowScrollBarX from "./getWindowScrollBarX.js";
+import getDocumentElement from "./getDocumentElement.js";
+import isScrollParent from "./isScrollParent.js";
+import { round } from "../utils/math.js";
+
+function isElementScaled(element) {
+  var rect = element.getBoundingClientRect();
+  var scaleX = round(rect.width) / element.offsetWidth || 1;
+  var scaleY = round(rect.height) / element.offsetHeight || 1;
+  return scaleX !== 1 || scaleY !== 1;
+} // Returns the composite rect of an element relative to its offsetParent.
+// Composite means it takes into account transforms as well as layout.
+
+
+export default function getCompositeRect(elementOrVirtualElement, offsetParent, isFixed) {
+  if (isFixed === void 0) {
+    isFixed = false;
+  }
+
+  var isOffsetParentAnElement = isHTMLElement(offsetParent);
+  var offsetParentIsScaled = isHTMLElement(offsetParent) && isElementScaled(offsetParent);
+  var documentElement = getDocumentElement(offsetParent);
+  var rect = getBoundingClientRect(elementOrVirtualElement, offsetParentIsScaled);
+  var scroll = {
+    scrollLeft: 0,
+    scrollTop: 0
+  };
+  var offsets = {
+    x: 0,
+    y: 0
+  };
+
+  if (isOffsetParentAnElement || !isOffsetParentAnElement && !isFixed) {
+    if (getNodeName(offsetParent) !== 'body' || // https://github.com/popperjs/popper-core/issues/1078
+    isScrollParent(documentElement)) {
+      scroll = getNodeScroll(offsetParent);
+    }
+
+    if (isHTMLElement(offsetParent)) {
+      offsets = getBoundingClientRect(offsetParent, true);
+      offsets.x += offsetParent.clientLeft;
+      offsets.y += offsetParent.clientTop;
+    } else if (documentElement) {
+      offsets.x = getWindowScrollBarX(documentElement);
+    }
+  }
+
+  return {
+    x: rect.left + scroll.scrollLeft - offsets.x,
+    y: rect.top + scroll.scrollTop - offsets.y,
+    width: rect.width,
+    height: rect.height
+  };
+}
+\ No newline at end of file