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wwwroot/lib/popper.js/esm/dom-utils/getClippingRect.js

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+import { viewport } from "../enums.js";
+import getViewportRect from "./getViewportRect.js";
+import getDocumentRect from "./getDocumentRect.js";
+import listScrollParents from "./listScrollParents.js";
+import getOffsetParent from "./getOffsetParent.js";
+import getDocumentElement from "./getDocumentElement.js";
+import getComputedStyle from "./getComputedStyle.js";
+import { isElement, isHTMLElement } from "./instanceOf.js";
+import getBoundingClientRect from "./getBoundingClientRect.js";
+import getParentNode from "./getParentNode.js";
+import contains from "./contains.js";
+import getNodeName from "./getNodeName.js";
+import rectToClientRect from "../utils/rectToClientRect.js";
+import { max, min } from "../utils/math.js";
+
+function getInnerBoundingClientRect(element, strategy) {
+  var rect = getBoundingClientRect(element, false, strategy === 'fixed');
+  rect.top = rect.top + element.clientTop;
+  rect.left = rect.left + element.clientLeft;
+  rect.bottom = rect.top + element.clientHeight;
+  rect.right = rect.left + element.clientWidth;
+  rect.width = element.clientWidth;
+  rect.height = element.clientHeight;
+  rect.x = rect.left;
+  rect.y = rect.top;
+  return rect;
+}
+
+function getClientRectFromMixedType(element, clippingParent, strategy) {
+  return clippingParent === viewport ? rectToClientRect(getViewportRect(element, strategy)) : isElement(clippingParent) ? getInnerBoundingClientRect(clippingParent, strategy) : rectToClientRect(getDocumentRect(getDocumentElement(element)));
+} // A "clipping parent" is an overflowable container with the characteristic of
+// clipping (or hiding) overflowing elements with a position different from
+// `initial`
+
+
+function getClippingParents(element) {
+  var clippingParents = listScrollParents(getParentNode(element));
+  var canEscapeClipping = ['absolute', 'fixed'].indexOf(getComputedStyle(element).position) >= 0;
+  var clipperElement = canEscapeClipping && isHTMLElement(element) ? getOffsetParent(element) : element;
+
+  if (!isElement(clipperElement)) {
+    return [];
+  } // $FlowFixMe[incompatible-return]: https://github.com/facebook/flow/issues/1414
+
+
+  return clippingParents.filter(function (clippingParent) {
+    return isElement(clippingParent) && contains(clippingParent, clipperElement) && getNodeName(clippingParent) !== 'body';
+  });
+} // Gets the maximum area that the element is visible in due to any number of
+// clipping parents
+
+
+export default function getClippingRect(element, boundary, rootBoundary, strategy) {
+  var mainClippingParents = boundary === 'clippingParents' ? getClippingParents(element) : [].concat(boundary);
+  var clippingParents = [].concat(mainClippingParents, [rootBoundary]);
+  var firstClippingParent = clippingParents[0];
+  var clippingRect = clippingParents.reduce(function (accRect, clippingParent) {
+    var rect = getClientRectFromMixedType(element, clippingParent, strategy);
+    accRect.top = max(rect.top, accRect.top);
+    accRect.right = min(rect.right, accRect.right);
+    accRect.bottom = min(rect.bottom, accRect.bottom);
+    accRect.left = max(rect.left, accRect.left);
+    return accRect;
+  }, getClientRectFromMixedType(element, firstClippingParent, strategy));
+  clippingRect.width = clippingRect.right - clippingRect.left;
+  clippingRect.height = clippingRect.bottom - clippingRect.top;
+  clippingRect.x = clippingRect.left;
+  clippingRect.y = clippingRect.top;
+  return clippingRect;
+}