111 lines
4.4 KiB
JavaScript
111 lines
4.4 KiB
JavaScript
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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var hasDifferentOriginAncestorFlag = false;
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var sameOriginWindowChainCache = null;
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function getParentWindowIfSameOrigin(w) {
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if (!w.parent || w.parent === w) {
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return null;
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}
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// Cannot really tell if we have access to the parent window unless we try to access something in it
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try {
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var location_1 = w.location;
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var parentLocation = w.parent.location;
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if (location_1.protocol !== parentLocation.protocol || location_1.hostname !== parentLocation.hostname || location_1.port !== parentLocation.port) {
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hasDifferentOriginAncestorFlag = true;
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return null;
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}
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}
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catch (e) {
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hasDifferentOriginAncestorFlag = true;
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return null;
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}
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return w.parent;
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}
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function findIframeElementInParentWindow(parentWindow, childWindow) {
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var parentWindowIframes = parentWindow.document.getElementsByTagName('iframe');
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var iframe;
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for (var i = 0, len = parentWindowIframes.length; i < len; i++) {
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iframe = parentWindowIframes[i];
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if (iframe.contentWindow === childWindow) {
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return iframe;
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}
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}
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return null;
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}
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var IframeUtils = /** @class */ (function () {
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function IframeUtils() {
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}
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/**
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* Returns a chain of embedded windows with the same origin (which can be accessed programmatically).
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* Having a chain of length 1 might mean that the current execution environment is running outside of an iframe or inside an iframe embedded in a window with a different origin.
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* To distinguish if at one point the current execution environment is running inside a window with a different origin, see hasDifferentOriginAncestor()
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*/
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IframeUtils.getSameOriginWindowChain = function () {
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if (!sameOriginWindowChainCache) {
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sameOriginWindowChainCache = [];
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var w = window;
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var parent_1;
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do {
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parent_1 = getParentWindowIfSameOrigin(w);
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if (parent_1) {
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sameOriginWindowChainCache.push({
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window: w,
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iframeElement: findIframeElementInParentWindow(parent_1, w)
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});
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}
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else {
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sameOriginWindowChainCache.push({
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window: w,
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iframeElement: null
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});
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}
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w = parent_1;
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} while (w);
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}
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return sameOriginWindowChainCache.slice(0);
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};
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/**
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* Returns true if the current execution environment is chained in a list of iframes which at one point ends in a window with a different origin.
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* Returns false if the current execution environment is not running inside an iframe or if the entire chain of iframes have the same origin.
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*/
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IframeUtils.hasDifferentOriginAncestor = function () {
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if (!sameOriginWindowChainCache) {
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this.getSameOriginWindowChain();
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}
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return hasDifferentOriginAncestorFlag;
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};
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/**
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* Returns the position of `childWindow` relative to `ancestorWindow`
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*/
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IframeUtils.getPositionOfChildWindowRelativeToAncestorWindow = function (childWindow, ancestorWindow) {
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if (!ancestorWindow || childWindow === ancestorWindow) {
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return {
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top: 0,
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left: 0
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};
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}
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var top = 0, left = 0;
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var windowChain = this.getSameOriginWindowChain();
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for (var _i = 0, windowChain_1 = windowChain; _i < windowChain_1.length; _i++) {
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var windowChainEl = windowChain_1[_i];
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if (windowChainEl.window === ancestorWindow) {
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break;
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}
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if (!windowChainEl.iframeElement) {
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break;
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}
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var boundingRect = windowChainEl.iframeElement.getBoundingClientRect();
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top += boundingRect.top;
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left += boundingRect.left;
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}
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return {
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top: top,
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left: left
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};
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};
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return IframeUtils;
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}());
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export { IframeUtils };
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