From b950b25644f02a7405bc6caaf578316705f6f578 Mon Sep 17 00:00:00 2001 From: sjorsdonkers <72333389+sjorsdonkers@users.noreply.github.com> Date: Wed, 30 Apr 2025 12:42:19 +0200 Subject: [PATCH 1/2] intersectionobserver polyfill --- src/browser/polyfill/intersection_observer.js | 1018 +++++++++++++++++ .../polyfill/intersection_observer.zig | 5 + src/browser/polyfill/polyfill.zig | 1 + src/cdp/cdp.zig | 3 + 4 files changed, 1027 insertions(+) create mode 100644 src/browser/polyfill/intersection_observer.js create mode 100644 src/browser/polyfill/intersection_observer.zig diff --git a/src/browser/polyfill/intersection_observer.js b/src/browser/polyfill/intersection_observer.js new file mode 100644 index 000000000..3e8df9762 --- /dev/null +++ b/src/browser/polyfill/intersection_observer.js @@ -0,0 +1,1018 @@ +/** + * Copyright 2016 Google Inc. All Rights Reserved. + * + * Licensed under the W3C SOFTWARE AND DOCUMENT NOTICE AND LICENSE. + * + * https://www.w3.org/Consortium/Legal/2015/copyright-software-and-document + * + */ +(function() { + 'use strict'; + + // Exit early if we're not running in a browser. + if (typeof window !== 'object') { + return; + } + + // Exit early if all IntersectionObserver and IntersectionObserverEntry + // features are natively supported. + if ('IntersectionObserver' in window && + 'IntersectionObserverEntry' in window && + 'intersectionRatio' in window.IntersectionObserverEntry.prototype) { + + // Minimal polyfill for Edge 15's lack of `isIntersecting` + // See: https://github.com/w3c/IntersectionObserver/issues/211 + if (!('isIntersecting' in window.IntersectionObserverEntry.prototype)) { + Object.defineProperty(window.IntersectionObserverEntry.prototype, + 'isIntersecting', { + get: function () { + return this.intersectionRatio > 0; + } + }); + } + return; + } + + /** + * Returns the embedding frame element, if any. + * @param {!Document} doc + * @return {!Element} + */ + function getFrameElement(doc) { + try { + return doc.defaultView && doc.defaultView.frameElement || null; + } catch (e) { + // Ignore the error. + return null; + } + } + + /** + * A local reference to the root document. + */ + var document = (function(startDoc) { + var doc = startDoc; + var frame = getFrameElement(doc); + while (frame) { + doc = frame.ownerDocument; + frame = getFrameElement(doc); + } + return doc; + })(window.document); + + /** + * An IntersectionObserver registry. This registry exists to hold a strong + * reference to IntersectionObserver instances currently observing a target + * element. Without this registry, instances without another reference may be + * garbage collected. + */ + var registry = []; + + /** + * The signal updater for cross-origin intersection. When not null, it means + * that the polyfill is configured to work in a cross-origin mode. + * @type {function(DOMRect|ClientRect, DOMRect|ClientRect)} + */ + var crossOriginUpdater = null; + + /** + * The current cross-origin intersection. Only used in the cross-origin mode. + * @type {DOMRect|ClientRect} + */ + var crossOriginRect = null; + + + /** + * Creates the global IntersectionObserverEntry constructor. + * https://w3c.github.io/IntersectionObserver/#intersection-observer-entry + * @param {Object} entry A dictionary of instance properties. + * @constructor + */ + function IntersectionObserverEntry(entry) { + this.time = entry.time; + this.target = entry.target; + this.rootBounds = ensureDOMRect(entry.rootBounds); + this.boundingClientRect = ensureDOMRect(entry.boundingClientRect); + this.intersectionRect = ensureDOMRect(entry.intersectionRect || getEmptyRect()); + this.isIntersecting = !!entry.intersectionRect; + + // Calculates the intersection ratio. + var targetRect = this.boundingClientRect; + var targetArea = targetRect.width * targetRect.height; + var intersectionRect = this.intersectionRect; + var intersectionArea = intersectionRect.width * intersectionRect.height; + + // Sets intersection ratio. + if (targetArea) { + // Round the intersection ratio to avoid floating point math issues: + // https://github.com/w3c/IntersectionObserver/issues/324 + this.intersectionRatio = Number((intersectionArea / targetArea).toFixed(4)); + } else { + // If area is zero and is intersecting, sets to 1, otherwise to 0 + this.intersectionRatio = this.isIntersecting ? 1 : 0; + } + } + + + /** + * Creates the global IntersectionObserver constructor. + * https://w3c.github.io/IntersectionObserver/#intersection-observer-interface + * @param {Function} callback The function to be invoked after intersection + * changes have queued. The function is not invoked if the queue has + * been emptied by calling the `takeRecords` method. + * @param {Object=} opt_options Optional configuration options. + * @constructor + */ + function IntersectionObserver(callback, opt_options) { + + var options = opt_options || {}; + + if (typeof callback != 'function') { + throw new Error('callback must be a function'); + } + + if ( + options.root && + options.root.nodeType != 1 && + options.root.nodeType != 9 + ) { + throw new Error('root must be a Document or Element'); + } + + // Binds and throttles `this._checkForIntersections`. + this._checkForIntersections = throttle( + this._checkForIntersections.bind(this), this.THROTTLE_TIMEOUT); + + // Private properties. + this._callback = callback; + this._observationTargets = []; + this._queuedEntries = []; + this._rootMarginValues = this._parseRootMargin(options.rootMargin); + + // Public properties. + this.thresholds = this._initThresholds(options.threshold); + this.root = options.root || null; + this.rootMargin = this._rootMarginValues.map(function(margin) { + return margin.value + margin.unit; + }).join(' '); + + /** @private @const {!Array} */ + this._monitoringDocuments = []; + /** @private @const {!Array} */ + this._monitoringUnsubscribes = []; + } + + + /** + * The minimum interval within which the document will be checked for + * intersection changes. + */ + IntersectionObserver.prototype.THROTTLE_TIMEOUT = 100; + + + /** + * The frequency in which the polyfill polls for intersection changes. + * this can be updated on a per instance basis and must be set prior to + * calling `observe` on the first target. + */ + IntersectionObserver.prototype.POLL_INTERVAL = null; + + /** + * Use a mutation observer on the root element + * to detect intersection changes. + */ + IntersectionObserver.prototype.USE_MUTATION_OBSERVER = true; + + + /** + * Sets up the polyfill in the cross-origin mode. The result is the + * updater function that accepts two arguments: `boundingClientRect` and + * `intersectionRect` - just as these fields would be available to the + * parent via `IntersectionObserverEntry`. This function should be called + * each time the iframe receives intersection information from the parent + * window, e.g. via messaging. + * @return {function(DOMRect|ClientRect, DOMRect|ClientRect)} + */ + IntersectionObserver._setupCrossOriginUpdater = function() { + if (!crossOriginUpdater) { + /** + * @param {DOMRect|ClientRect} boundingClientRect + * @param {DOMRect|ClientRect} intersectionRect + */ + crossOriginUpdater = function(boundingClientRect, intersectionRect) { + if (!boundingClientRect || !intersectionRect) { + crossOriginRect = getEmptyRect(); + } else { + crossOriginRect = convertFromParentRect(boundingClientRect, intersectionRect); + } + registry.forEach(function(observer) { + observer._checkForIntersections(); + }); + }; + } + return crossOriginUpdater; + }; + + + /** + * Resets the cross-origin mode. + */ + IntersectionObserver._resetCrossOriginUpdater = function() { + crossOriginUpdater = null; + crossOriginRect = null; + }; + + + /** + * Starts observing a target element for intersection changes based on + * the thresholds values. + * @param {Element} target The DOM element to observe. + */ + IntersectionObserver.prototype.observe = function(target) { + var isTargetAlreadyObserved = this._observationTargets.some(function(item) { + return item.element == target; + }); + + if (isTargetAlreadyObserved) { + return; + } + + if (!(target && target.nodeType == 1)) { + throw new Error('target must be an Element'); + } + + this._registerInstance(); + this._observationTargets.push({element: target, entry: null}); + this._monitorIntersections(target.ownerDocument); + this._checkForIntersections(); + }; + + + /** + * Stops observing a target element for intersection changes. + * @param {Element} target The DOM element to observe. + */ + IntersectionObserver.prototype.unobserve = function(target) { + this._observationTargets = + this._observationTargets.filter(function(item) { + return item.element != target; + }); + this._unmonitorIntersections(target.ownerDocument); + if (this._observationTargets.length == 0) { + this._unregisterInstance(); + } + }; + + + /** + * Stops observing all target elements for intersection changes. + */ + IntersectionObserver.prototype.disconnect = function() { + this._observationTargets = []; + this._unmonitorAllIntersections(); + this._unregisterInstance(); + }; + + + /** + * Returns any queue entries that have not yet been reported to the + * callback and clears the queue. This can be used in conjunction with the + * callback to obtain the absolute most up-to-date intersection information. + * @return {Array} The currently queued entries. + */ + IntersectionObserver.prototype.takeRecords = function() { + var records = this._queuedEntries.slice(); + this._queuedEntries = []; + return records; + }; + + + /** + * Accepts the threshold value from the user configuration object and + * returns a sorted array of unique threshold values. If a value is not + * between 0 and 1 and error is thrown. + * @private + * @param {Array|number=} opt_threshold An optional threshold value or + * a list of threshold values, defaulting to [0]. + * @return {Array} A sorted list of unique and valid threshold values. + */ + IntersectionObserver.prototype._initThresholds = function(opt_threshold) { + var threshold = opt_threshold || [0]; + if (!Array.isArray(threshold)) threshold = [threshold]; + + return threshold.sort().filter(function(t, i, a) { + if (typeof t != 'number' || isNaN(t) || t < 0 || t > 1) { + throw new Error('threshold must be a number between 0 and 1 inclusively'); + } + return t !== a[i - 1]; + }); + }; + + + /** + * Accepts the rootMargin value from the user configuration object + * and returns an array of the four margin values as an object containing + * the value and unit properties. If any of the values are not properly + * formatted or use a unit other than px or %, and error is thrown. + * @private + * @param {string=} opt_rootMargin An optional rootMargin value, + * defaulting to '0px'. + * @return {Array} An array of margin objects with the keys + * value and unit. + */ + IntersectionObserver.prototype._parseRootMargin = function(opt_rootMargin) { + var marginString = opt_rootMargin || '0px'; + var margins = marginString.split(/\s+/).map(function(margin) { + var parts = /^(-?\d*\.?\d+)(px|%)$/.exec(margin); + if (!parts) { + throw new Error('rootMargin must be specified in pixels or percent'); + } + return {value: parseFloat(parts[1]), unit: parts[2]}; + }); + + // Handles shorthand. + margins[1] = margins[1] || margins[0]; + margins[2] = margins[2] || margins[0]; + margins[3] = margins[3] || margins[1]; + + return margins; + }; + + + /** + * Starts polling for intersection changes if the polling is not already + * happening, and if the page's visibility state is visible. + * @param {!Document} doc + * @private + */ + IntersectionObserver.prototype._monitorIntersections = function(doc) { + var win = doc.defaultView; + if (!win) { + // Already destroyed. + return; + } + if (this._monitoringDocuments.indexOf(doc) != -1) { + // Already monitoring. + return; + } + + // Private state for monitoring. + var callback = this._checkForIntersections; + var monitoringInterval = null; + var domObserver = null; + + // If a poll interval is set, use polling instead of listening to + // resize and scroll events or DOM mutations. + if (this.POLL_INTERVAL) { + monitoringInterval = win.setInterval(callback, this.POLL_INTERVAL); + } else { + addEvent(win, 'resize', callback, true); + addEvent(doc, 'scroll', callback, true); + if (this.USE_MUTATION_OBSERVER && 'MutationObserver' in win) { + domObserver = new win.MutationObserver(callback); + domObserver.observe(doc, { + attributes: true, + childList: true, + characterData: true, + subtree: true + }); + } + } + + this._monitoringDocuments.push(doc); + this._monitoringUnsubscribes.push(function() { + // Get the window object again. When a friendly iframe is destroyed, it + // will be null. + var win = doc.defaultView; + + if (win) { + if (monitoringInterval) { + win.clearInterval(monitoringInterval); + } + removeEvent(win, 'resize', callback, true); + } + + removeEvent(doc, 'scroll', callback, true); + if (domObserver) { + domObserver.disconnect(); + } + }); + + // Also monitor the parent. + var rootDoc = + (this.root && (this.root.ownerDocument || this.root)) || document; + if (doc != rootDoc) { + var frame = getFrameElement(doc); + if (frame) { + this._monitorIntersections(frame.ownerDocument); + } + } + }; + + + /** + * Stops polling for intersection changes. + * @param {!Document} doc + * @private + */ + IntersectionObserver.prototype._unmonitorIntersections = function(doc) { + var index = this._monitoringDocuments.indexOf(doc); + if (index == -1) { + return; + } + + var rootDoc = + (this.root && (this.root.ownerDocument || this.root)) || document; + + // Check if any dependent targets are still remaining. + var hasDependentTargets = + this._observationTargets.some(function(item) { + var itemDoc = item.element.ownerDocument; + // Target is in this context. + if (itemDoc == doc) { + return true; + } + // Target is nested in this context. + while (itemDoc && itemDoc != rootDoc) { + var frame = getFrameElement(itemDoc); + itemDoc = frame && frame.ownerDocument; + if (itemDoc == doc) { + return true; + } + } + return false; + }); + if (hasDependentTargets) { + return; + } + + // Unsubscribe. + var unsubscribe = this._monitoringUnsubscribes[index]; + this._monitoringDocuments.splice(index, 1); + this._monitoringUnsubscribes.splice(index, 1); + unsubscribe(); + + // Also unmonitor the parent. + if (doc != rootDoc) { + var frame = getFrameElement(doc); + if (frame) { + this._unmonitorIntersections(frame.ownerDocument); + } + } + }; + + + /** + * Stops polling for intersection changes. + * @param {!Document} doc + * @private + */ + IntersectionObserver.prototype._unmonitorAllIntersections = function() { + var unsubscribes = this._monitoringUnsubscribes.slice(0); + this._monitoringDocuments.length = 0; + this._monitoringUnsubscribes.length = 0; + for (var i = 0; i < unsubscribes.length; i++) { + unsubscribes[i](); + } + }; + + + /** + * Scans each observation target for intersection changes and adds them + * to the internal entries queue. If new entries are found, it + * schedules the callback to be invoked. + * @private + */ + IntersectionObserver.prototype._checkForIntersections = function() { + if (!this.root && crossOriginUpdater && !crossOriginRect) { + // Cross origin monitoring, but no initial data available yet. + return; + } + + var rootIsInDom = this._rootIsInDom(); + var rootRect = rootIsInDom ? this._getRootRect() : getEmptyRect(); + + this._observationTargets.forEach(function(item) { + var target = item.element; + var targetRect = getBoundingClientRect(target); + var rootContainsTarget = this._rootContainsTarget(target); + var oldEntry = item.entry; + var intersectionRect = rootIsInDom && rootContainsTarget && + this._computeTargetAndRootIntersection(target, targetRect, rootRect); + + var rootBounds = null; + if (!this._rootContainsTarget(target)) { + rootBounds = getEmptyRect(); + } else if (!crossOriginUpdater || this.root) { + rootBounds = rootRect; + } + + var newEntry = item.entry = new IntersectionObserverEntry({ + time: now(), + target: target, + boundingClientRect: targetRect, + rootBounds: rootBounds, + intersectionRect: intersectionRect + }); + + if (!oldEntry) { + this._queuedEntries.push(newEntry); + } else if (rootIsInDom && rootContainsTarget) { + // If the new entry intersection ratio has crossed any of the + // thresholds, add a new entry. + if (this._hasCrossedThreshold(oldEntry, newEntry)) { + this._queuedEntries.push(newEntry); + } + } else { + // If the root is not in the DOM or target is not contained within + // root but the previous entry for this target had an intersection, + // add a new record indicating removal. + if (oldEntry && oldEntry.isIntersecting) { + this._queuedEntries.push(newEntry); + } + } + }, this); + + if (this._queuedEntries.length) { + this._callback(this.takeRecords(), this); + } + }; + + + /** + * Accepts a target and root rect computes the intersection between then + * following the algorithm in the spec. + * TODO(philipwalton): at this time clip-path is not considered. + * https://w3c.github.io/IntersectionObserver/#calculate-intersection-rect-algo + * @param {Element} target The target DOM element + * @param {Object} targetRect The bounding rect of the target. + * @param {Object} rootRect The bounding rect of the root after being + * expanded by the rootMargin value. + * @return {?Object} The final intersection rect object or undefined if no + * intersection is found. + * @private + */ + IntersectionObserver.prototype._computeTargetAndRootIntersection = + function(target, targetRect, rootRect) { + // If the element isn't displayed, an intersection can't happen. + if (window.getComputedStyle(target).display == 'none') return; + + var intersectionRect = targetRect; + var parent = getParentNode(target); + var atRoot = false; + + while (!atRoot && parent) { + var parentRect = null; + var parentComputedStyle = parent.nodeType == 1 ? + window.getComputedStyle(parent) : {}; + + // If the parent isn't displayed, an intersection can't happen. + if (parentComputedStyle.display == 'none') return null; + + if (parent == this.root || parent.nodeType == /* DOCUMENT */ 9) { + atRoot = true; + if (parent == this.root || parent == document) { + if (crossOriginUpdater && !this.root) { + if (!crossOriginRect || + crossOriginRect.width == 0 && crossOriginRect.height == 0) { + // A 0-size cross-origin intersection means no-intersection. + parent = null; + parentRect = null; + intersectionRect = null; + } else { + parentRect = crossOriginRect; + } + } else { + parentRect = rootRect; + } + } else { + // Check if there's a frame that can be navigated to. + var frame = getParentNode(parent); + var frameRect = frame && getBoundingClientRect(frame); + var frameIntersect = + frame && + this._computeTargetAndRootIntersection(frame, frameRect, rootRect); + if (frameRect && frameIntersect) { + parent = frame; + parentRect = convertFromParentRect(frameRect, frameIntersect); + } else { + parent = null; + intersectionRect = null; + } + } + } else { + // If the element has a non-visible overflow, and it's not the + // or element, update the intersection rect. + // Note: and cannot be clipped to a rect that's not also + // the document rect, so no need to compute a new intersection. + var doc = parent.ownerDocument; + if (parent != doc.body && + parent != doc.documentElement && + parentComputedStyle.overflow != 'visible') { + parentRect = getBoundingClientRect(parent); + } + } + + // If either of the above conditionals set a new parentRect, + // calculate new intersection data. + if (parentRect) { + intersectionRect = computeRectIntersection(parentRect, intersectionRect); + } + if (!intersectionRect) break; + parent = parent && getParentNode(parent); + } + return intersectionRect; + }; + + + /** + * Returns the root rect after being expanded by the rootMargin value. + * @return {ClientRect} The expanded root rect. + * @private + */ + IntersectionObserver.prototype._getRootRect = function() { + console.log('window.document: '+ window.document); + console.log('document: '+ document); + console.log('window.self: '+ window.self); + console.log('window: '+ window); + var rootRect; + if (this.root && !isDoc(this.root)) { + rootRect = getBoundingClientRect(this.root); + } else { + // Use / instead of window since scroll bars affect size. + var doc = isDoc(this.root) ? this.root : document; + var html = doc.documentElement; + var body = doc.body; + rootRect = { + top: 0, + left: 0, + right: html.clientWidth || body.clientWidth, + width: html.clientWidth || body.clientWidth, + bottom: html.clientHeight || body.clientHeight, + height: html.clientHeight || body.clientHeight + }; + } + return this._expandRectByRootMargin(rootRect); + }; + + + /** + * Accepts a rect and expands it by the rootMargin value. + * @param {DOMRect|ClientRect} rect The rect object to expand. + * @return {ClientRect} The expanded rect. + * @private + */ + IntersectionObserver.prototype._expandRectByRootMargin = function(rect) { + var margins = this._rootMarginValues.map(function(margin, i) { + return margin.unit == 'px' ? margin.value : + margin.value * (i % 2 ? rect.width : rect.height) / 100; + }); + var newRect = { + top: rect.top - margins[0], + right: rect.right + margins[1], + bottom: rect.bottom + margins[2], + left: rect.left - margins[3] + }; + newRect.width = newRect.right - newRect.left; + newRect.height = newRect.bottom - newRect.top; + + return newRect; + }; + + + /** + * Accepts an old and new entry and returns true if at least one of the + * threshold values has been crossed. + * @param {?IntersectionObserverEntry} oldEntry The previous entry for a + * particular target element or null if no previous entry exists. + * @param {IntersectionObserverEntry} newEntry The current entry for a + * particular target element. + * @return {boolean} Returns true if a any threshold has been crossed. + * @private + */ + IntersectionObserver.prototype._hasCrossedThreshold = + function(oldEntry, newEntry) { + + // To make comparing easier, an entry that has a ratio of 0 + // but does not actually intersect is given a value of -1 + var oldRatio = oldEntry && oldEntry.isIntersecting ? + oldEntry.intersectionRatio || 0 : -1; + var newRatio = newEntry.isIntersecting ? + newEntry.intersectionRatio || 0 : -1; + + // Ignore unchanged ratios + if (oldRatio === newRatio) return; + + for (var i = 0; i < this.thresholds.length; i++) { + var threshold = this.thresholds[i]; + + // Return true if an entry matches a threshold or if the new ratio + // and the old ratio are on the opposite sides of a threshold. + if (threshold == oldRatio || threshold == newRatio || + threshold < oldRatio !== threshold < newRatio) { + return true; + } + } + }; + + + /** + * Returns whether or not the root element is an element and is in the DOM. + * @return {boolean} True if the root element is an element and is in the DOM. + * @private + */ + IntersectionObserver.prototype._rootIsInDom = function() { + return !this.root || containsDeep(document, this.root); + }; + + + /** + * Returns whether or not the target element is a child of root. + * @param {Element} target The target element to check. + * @return {boolean} True if the target element is a child of root. + * @private + */ + IntersectionObserver.prototype._rootContainsTarget = function(target) { + var rootDoc = + (this.root && (this.root.ownerDocument || this.root)) || document; + return ( + containsDeep(rootDoc, target) && + (!this.root || rootDoc == target.ownerDocument) + ); + }; + + + /** + * Adds the instance to the global IntersectionObserver registry if it isn't + * already present. + * @private + */ + IntersectionObserver.prototype._registerInstance = function() { + if (registry.indexOf(this) < 0) { + registry.push(this); + } + }; + + + /** + * Removes the instance from the global IntersectionObserver registry. + * @private + */ + IntersectionObserver.prototype._unregisterInstance = function() { + var index = registry.indexOf(this); + if (index != -1) registry.splice(index, 1); + }; + + + /** + * Returns the result of the performance.now() method or null in browsers + * that don't support the API. + * @return {number} The elapsed time since the page was requested. + */ + function now() { + return window.performance && performance.now && performance.now(); + } + + + /** + * Throttles a function and delays its execution, so it's only called at most + * once within a given time period. + * @param {Function} fn The function to throttle. + * @param {number} timeout The amount of time that must pass before the + * function can be called again. + * @return {Function} The throttled function. + */ + function throttle(fn, timeout) { + var timer = null; + return function () { + if (!timer) { + timer = setTimeout(function() { + fn(); + timer = null; + }, timeout); + } + }; + } + + + /** + * Adds an event handler to a DOM node ensuring cross-browser compatibility. + * @param {Node} node The DOM node to add the event handler to. + * @param {string} event The event name. + * @param {Function} fn The event handler to add. + * @param {boolean} opt_useCapture Optionally adds the even to the capture + * phase. Note: this only works in modern browsers. + */ + function addEvent(node, event, fn, opt_useCapture) { + if (typeof node.addEventListener == 'function') { + node.addEventListener(event, fn, opt_useCapture || false); + } + else if (typeof node.attachEvent == 'function') { + node.attachEvent('on' + event, fn); + } + } + + + /** + * Removes a previously added event handler from a DOM node. + * @param {Node} node The DOM node to remove the event handler from. + * @param {string} event The event name. + * @param {Function} fn The event handler to remove. + * @param {boolean} opt_useCapture If the event handler was added with this + * flag set to true, it should be set to true here in order to remove it. + */ + function removeEvent(node, event, fn, opt_useCapture) { + if (typeof node.removeEventListener == 'function') { + node.removeEventListener(event, fn, opt_useCapture || false); + } + else if (typeof node.detachEvent == 'function') { + node.detachEvent('on' + event, fn); + } + } + + + /** + * Returns the intersection between two rect objects. + * @param {Object} rect1 The first rect. + * @param {Object} rect2 The second rect. + * @return {?Object|?ClientRect} The intersection rect or undefined if no + * intersection is found. + */ + function computeRectIntersection(rect1, rect2) { + var top = Math.max(rect1.top, rect2.top); + var bottom = Math.min(rect1.bottom, rect2.bottom); + var left = Math.max(rect1.left, rect2.left); + var right = Math.min(rect1.right, rect2.right); + var width = right - left; + var height = bottom - top; + + return (width >= 0 && height >= 0) && { + top: top, + bottom: bottom, + left: left, + right: right, + width: width, + height: height + } || null; + } + + + /** + * Shims the native getBoundingClientRect for compatibility with older IE. + * @param {Element} el The element whose bounding rect to get. + * @return {DOMRect|ClientRect} The (possibly shimmed) rect of the element. + */ + function getBoundingClientRect(el) { + var rect; + + try { + rect = el.getBoundingClientRect(); + } catch (err) { + // Ignore Windows 7 IE11 "Unspecified error" + // https://github.com/w3c/IntersectionObserver/pull/205 + } + + if (!rect) return getEmptyRect(); + + // Older IE + if (!(rect.width && rect.height)) { + rect = { + top: rect.top, + right: rect.right, + bottom: rect.bottom, + left: rect.left, + width: rect.right - rect.left, + height: rect.bottom - rect.top + }; + } + return rect; + } + + + /** + * Returns an empty rect object. An empty rect is returned when an element + * is not in the DOM. + * @return {ClientRect} The empty rect. + */ + function getEmptyRect() { + return { + top: 0, + bottom: 0, + left: 0, + right: 0, + width: 0, + height: 0 + }; + } + + + /** + * Ensure that the result has all of the necessary fields of the DOMRect. + * Specifically this ensures that `x` and `y` fields are set. + * + * @param {?DOMRect|?ClientRect} rect + * @return {?DOMRect} + */ + function ensureDOMRect(rect) { + // A `DOMRect` object has `x` and `y` fields. + if (!rect || 'x' in rect) { + return rect; + } + // A IE's `ClientRect` type does not have `x` and `y`. The same is the case + // for internally calculated Rect objects. For the purposes of + // `IntersectionObserver`, it's sufficient to simply mirror `left` and `top` + // for these fields. + return { + top: rect.top, + y: rect.top, + bottom: rect.bottom, + left: rect.left, + x: rect.left, + right: rect.right, + width: rect.width, + height: rect.height + }; + } + + + /** + * Inverts the intersection and bounding rect from the parent (frame) BCR to + * the local BCR space. + * @param {DOMRect|ClientRect} parentBoundingRect The parent's bound client rect. + * @param {DOMRect|ClientRect} parentIntersectionRect The parent's own intersection rect. + * @return {ClientRect} The local root bounding rect for the parent's children. + */ + function convertFromParentRect(parentBoundingRect, parentIntersectionRect) { + var top = parentIntersectionRect.top - parentBoundingRect.top; + var left = parentIntersectionRect.left - parentBoundingRect.left; + return { + top: top, + left: left, + height: parentIntersectionRect.height, + width: parentIntersectionRect.width, + bottom: top + parentIntersectionRect.height, + right: left + parentIntersectionRect.width + }; + } + + + /** + * Checks to see if a parent element contains a child element (including inside + * shadow DOM). + * @param {Node} parent The parent element. + * @param {Node} child The child element. + * @return {boolean} True if the parent node contains the child node. + */ + function containsDeep(parent, child) { + var node = child; + while (node) { + if (node == parent) return true; + + node = getParentNode(node); + } + return false; + } + + + /** + * Gets the parent node of an element or its host element if the parent node + * is a shadow root. + * @param {Node} node The node whose parent to get. + * @return {Node|null} The parent node or null if no parent exists. + */ + function getParentNode(node) { + var parent = node.parentNode; + + if (node.nodeType == /* DOCUMENT */ 9 && node != document) { + // If this node is a document node, look for the embedding frame. + return getFrameElement(node); + } + + // If the parent has element that is assigned through shadow root slot + if (parent && parent.assignedSlot) { + parent = parent.assignedSlot.parentNode + } + + if (parent && parent.nodeType == 11 && parent.host) { + // If the parent is a shadow root, return the host element. + return parent.host; + } + + return parent; + } + + /** + * Returns true if `node` is a Document. + * @param {!Node} node + * @returns {boolean} + */ + function isDoc(node) { + return node && node.nodeType === 9; + } + + + // Exposes the constructors globally. + window.IntersectionObserver = IntersectionObserver; + window.IntersectionObserverEntry = IntersectionObserverEntry; + + }()); \ No newline at end of file diff --git a/src/browser/polyfill/intersection_observer.zig b/src/browser/polyfill/intersection_observer.zig new file mode 100644 index 000000000..16725764c --- /dev/null +++ b/src/browser/polyfill/intersection_observer.zig @@ -0,0 +1,5 @@ +const std = @import("std"); +// intersection_observer.js code comes from +// https://github.com/GoogleChromeLabs/intersection-observer/blob/main/intersection-observer.js + +pub const source = @embedFile("intersection_observer.js"); diff --git a/src/browser/polyfill/polyfill.zig b/src/browser/polyfill/polyfill.zig index 5ac4a806e..e04f182c8 100644 --- a/src/browser/polyfill/polyfill.zig +++ b/src/browser/polyfill/polyfill.zig @@ -29,6 +29,7 @@ const modules = [_]struct { source: []const u8, }{ .{ .name = "polyfill-fetch", .source = @import("fetch.zig").source }, + .{ .name = "polyfill-intersection-observer", .source = @import("intersection_observer.zig").source }, }; pub fn load(allocator: Allocator, scope: *Env.Scope) !void { diff --git a/src/cdp/cdp.zig b/src/cdp/cdp.zig index b1b2447dc..55183ab47 100644 --- a/src/cdp/cdp.zig +++ b/src/cdp/cdp.zig @@ -382,6 +382,9 @@ pub fn BrowserContext(comptime CDP_T: type) type { // This also means this pointer becomes invalid after removePage untill a new page is created. // Currently we have only 1 page/frame and thus also only 1 state in the isolate world. world.scope = try world.executor.startScope(&page.window, &page.state, {}, false); + + const polyfill = @import("../browser/polyfill/polyfill.zig"); + try polyfill.load(self.arena, world.scope); } pub fn nodeWriter(self: *Self, node: *const Node, opts: Node.Writer.Opts) Node.Writer { From f977455a662a69d3c55126d4d4480b21a521b928 Mon Sep 17 00:00:00 2001 From: sjorsdonkers <72333389+sjorsdonkers@users.noreply.github.com> Date: Wed, 30 Apr 2025 16:49:57 +0200 Subject: [PATCH 2/2] temp CSSStyleDeclaration --- src/browser/env.zig | 7 ++++++ src/browser/html/window.zig | 5 +++++ src/browser/polyfill/intersection_observer.js | 22 ++++++++----------- .../polyfill/intersection_observer.zig | 2 +- 4 files changed, 22 insertions(+), 14 deletions(-) diff --git a/src/browser/env.zig b/src/browser/env.zig index 64b227fbf..7b1f1eade 100644 --- a/src/browser/env.zig +++ b/src/browser/env.zig @@ -19,8 +19,15 @@ const Interfaces = generate.Tuple(.{ @import("url/url.zig").Interfaces, @import("xhr/xhr.zig").Interfaces, @import("xmlserializer/xmlserializer.zig").Interfaces, + CSSStyleDeclaration, }); +pub const CSSStyleDeclaration = struct { + pub fn get_display(_: *CSSStyleDeclaration) []const u8 { + return "anythingbutnotnone"; + } +}; + pub const JsThis = Env.JsThis; pub const JsObject = Env.JsObject; pub const Callback = Env.Callback; diff --git a/src/browser/html/window.zig b/src/browser/html/window.zig index 45aa76730..f696e4f31 100644 --- a/src/browser/html/window.zig +++ b/src/browser/html/window.zig @@ -115,6 +115,11 @@ pub const Window = struct { return &self.storage_shelf.?.bucket.session; } + const Env = @import("../env.zig"); + pub fn _getComputedStyle(_: *Window, _: *parser.Element) Env.CSSStyleDeclaration { + return .{}; + } + // TODO handle callback arguments. pub fn _setTimeout(self: *Window, cbk: Callback, delay: ?u32, state: *SessionState) !u32 { if (self.timeoutid >= self.timeoutids.len) return error.TooMuchTimeout; diff --git a/src/browser/polyfill/intersection_observer.js b/src/browser/polyfill/intersection_observer.js index 3e8df9762..9c6c39803 100644 --- a/src/browser/polyfill/intersection_observer.js +++ b/src/browser/polyfill/intersection_observer.js @@ -50,15 +50,15 @@ /** * A local reference to the root document. */ - var document = (function(startDoc) { - var doc = startDoc; - var frame = getFrameElement(doc); - while (frame) { - doc = frame.ownerDocument; - frame = getFrameElement(doc); - } - return doc; - })(window.document); + // var document = (function(startDoc) { + // var doc = startDoc; + // var frame = getFrameElement(doc); + // while (frame) { + // doc = frame.ownerDocument; + // frame = getFrameElement(doc); + // } + // return doc; + // })(window.document); /** * An IntersectionObserver registry. This registry exists to hold a strong @@ -631,10 +631,6 @@ * @private */ IntersectionObserver.prototype._getRootRect = function() { - console.log('window.document: '+ window.document); - console.log('document: '+ document); - console.log('window.self: '+ window.self); - console.log('window: '+ window); var rootRect; if (this.root && !isDoc(this.root)) { rootRect = getBoundingClientRect(this.root); diff --git a/src/browser/polyfill/intersection_observer.zig b/src/browser/polyfill/intersection_observer.zig index 16725764c..95399ea77 100644 --- a/src/browser/polyfill/intersection_observer.zig +++ b/src/browser/polyfill/intersection_observer.zig @@ -1,5 +1,5 @@ const std = @import("std"); // intersection_observer.js code comes from // https://github.com/GoogleChromeLabs/intersection-observer/blob/main/intersection-observer.js - +// It has been modified to not make a local copy of document as this is loaded ahead of time pub const source = @embedFile("intersection_observer.js");