| /* |
| * Copyright (C) 2007 Apple Inc. All rights reserved. |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Contains diff method based on Javascript Diff Algorithm By John Resig |
| * http://ejohn.org/files/jsdiff.js (released under the MIT license). |
| */ |
| |
| /** |
| * @param {number} offset |
| * @param {string} stopCharacters |
| * @param {!Node} stayWithinNode |
| * @param {string=} direction |
| * @return {!Range} |
| */ |
| Node.prototype.rangeOfWord = function(offset, stopCharacters, stayWithinNode, direction) |
| { |
| var startNode; |
| var startOffset = 0; |
| var endNode; |
| var endOffset = 0; |
| |
| if (!stayWithinNode) |
| stayWithinNode = this; |
| |
| if (!direction || direction === "backward" || direction === "both") { |
| var node = this; |
| while (node) { |
| if (node === stayWithinNode) { |
| if (!startNode) |
| startNode = stayWithinNode; |
| break; |
| } |
| |
| if (node.nodeType === Node.TEXT_NODE) { |
| var start = (node === this ? (offset - 1) : (node.nodeValue.length - 1)); |
| for (var i = start; i >= 0; --i) { |
| if (stopCharacters.indexOf(node.nodeValue[i]) !== -1) { |
| startNode = node; |
| startOffset = i + 1; |
| break; |
| } |
| } |
| } |
| |
| if (startNode) |
| break; |
| |
| node = node.traversePreviousNode(stayWithinNode); |
| } |
| |
| if (!startNode) { |
| startNode = stayWithinNode; |
| startOffset = 0; |
| } |
| } else { |
| startNode = this; |
| startOffset = offset; |
| } |
| |
| if (!direction || direction === "forward" || direction === "both") { |
| node = this; |
| while (node) { |
| if (node === stayWithinNode) { |
| if (!endNode) |
| endNode = stayWithinNode; |
| break; |
| } |
| |
| if (node.nodeType === Node.TEXT_NODE) { |
| var start = (node === this ? offset : 0); |
| for (var i = start; i < node.nodeValue.length; ++i) { |
| if (stopCharacters.indexOf(node.nodeValue[i]) !== -1) { |
| endNode = node; |
| endOffset = i; |
| break; |
| } |
| } |
| } |
| |
| if (endNode) |
| break; |
| |
| node = node.traverseNextNode(stayWithinNode); |
| } |
| |
| if (!endNode) { |
| endNode = stayWithinNode; |
| endOffset = stayWithinNode.nodeType === Node.TEXT_NODE ? stayWithinNode.nodeValue.length : stayWithinNode.childNodes.length; |
| } |
| } else { |
| endNode = this; |
| endOffset = offset; |
| } |
| |
| var result = this.ownerDocument.createRange(); |
| result.setStart(startNode, startOffset); |
| result.setEnd(endNode, endOffset); |
| |
| return result; |
| } |
| |
| /** |
| * @param {!Node=} stayWithin |
| * @return {?Node} |
| */ |
| Node.prototype.traverseNextTextNode = function(stayWithin) |
| { |
| var node = this.traverseNextNode(stayWithin); |
| if (!node) |
| return null; |
| var nonTextTags = { "STYLE": 1, "SCRIPT": 1 }; |
| while (node && (node.nodeType !== Node.TEXT_NODE || nonTextTags[node.parentElement.nodeName])) |
| node = node.traverseNextNode(stayWithin); |
| |
| return node; |
| } |
| |
| /** |
| * @param {number|undefined} x |
| * @param {number|undefined} y |
| * @param {!Element=} relativeTo |
| */ |
| Element.prototype.positionAt = function(x, y, relativeTo) |
| { |
| var shift = {x: 0, y: 0}; |
| if (relativeTo) |
| shift = relativeTo.boxInWindow(this.ownerDocument.defaultView); |
| |
| if (typeof x === "number") |
| this.style.setProperty("left", (shift.x + x) + "px"); |
| else |
| this.style.removeProperty("left"); |
| |
| if (typeof y === "number") |
| this.style.setProperty("top", (shift.y + y) + "px"); |
| else |
| this.style.removeProperty("top"); |
| |
| if (typeof x === "number" || typeof y === "number") |
| this.style.setProperty("position", "absolute"); |
| else |
| this.style.removeProperty("position"); |
| } |
| |
| /** |
| * @return {boolean} |
| */ |
| Element.prototype.isScrolledToBottom = function() |
| { |
| // This code works only for 0-width border. |
| // The scrollTop, clientHeight and scrollHeight are computed in double values internally. |
| // However, they are exposed to javascript differently, each being either rounded (via |
| // round, ceil or floor functions) or left intouch. |
| // This adds up a total error up to 2. |
| return Math.abs(this.scrollTop + this.clientHeight - this.scrollHeight) <= 2; |
| } |
| |
| /** |
| * @param {!Node} fromNode |
| * @param {!Node} toNode |
| */ |
| function removeSubsequentNodes(fromNode, toNode) |
| { |
| for (var node = fromNode; node && node !== toNode;) { |
| var nodeToRemove = node; |
| node = node.nextSibling; |
| nodeToRemove.remove(); |
| } |
| } |
| |
| /** |
| * @param {!Event} event |
| * @return {boolean} |
| */ |
| Element.prototype.containsEventPoint = function(event) |
| { |
| var box = this.getBoundingClientRect(); |
| return box.left < event.x && event.x < box.right && |
| box.top < event.y && event.y < box.bottom; |
| } |
| |
| /** |
| * @param {!Array.<string>} nameArray |
| * @return {?Node} |
| */ |
| Node.prototype.enclosingNodeOrSelfWithNodeNameInArray = function(nameArray) |
| { |
| for (var node = this; node && node !== this.ownerDocument; node = node.parentNodeOrShadowHost()) { |
| for (var i = 0; i < nameArray.length; ++i) { |
| if (node.nodeName.toLowerCase() === nameArray[i].toLowerCase()) |
| return node; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * @param {string} nodeName |
| * @return {?Node} |
| */ |
| Node.prototype.enclosingNodeOrSelfWithNodeName = function(nodeName) |
| { |
| return this.enclosingNodeOrSelfWithNodeNameInArray([nodeName]); |
| } |
| |
| /** |
| * @param {string} className |
| * @param {!Element=} stayWithin |
| * @return {?Element} |
| */ |
| Node.prototype.enclosingNodeOrSelfWithClass = function(className, stayWithin) |
| { |
| return this.enclosingNodeOrSelfWithClassList([className], stayWithin); |
| } |
| |
| /** |
| * @param {!Array.<string>} classNames |
| * @param {!Element=} stayWithin |
| * @return {?Element} |
| */ |
| Node.prototype.enclosingNodeOrSelfWithClassList = function(classNames, stayWithin) |
| { |
| for (var node = this; node && node !== stayWithin && node !== this.ownerDocument; node = node.parentNodeOrShadowHost()) { |
| if (node.nodeType === Node.ELEMENT_NODE) { |
| var containsAll = true; |
| for (var i = 0; i < classNames.length && containsAll; ++i) { |
| if (!node.classList.contains(classNames[i])) |
| containsAll = false; |
| } |
| if (containsAll) |
| return /** @type {!Element} */ (node); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * @return {?Element} |
| */ |
| Node.prototype.parentElementOrShadowHost = function() |
| { |
| var node = this.parentNode; |
| if (!node) |
| return null; |
| if (node.nodeType === Node.ELEMENT_NODE) |
| return /** @type {!Element} */ (node); |
| if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) |
| return /** @type {!Element} */ (node.host); |
| return null; |
| } |
| |
| /** |
| * @return {?Node} |
| */ |
| Node.prototype.parentNodeOrShadowHost = function() |
| { |
| return this.parentNode || this.host || null; |
| } |
| |
| /** |
| * @return {?Selection} |
| */ |
| Node.prototype.getComponentSelection = function() |
| { |
| var parent = this.parentNode; |
| while (parent && parent.nodeType !== Node.DOCUMENT_FRAGMENT_NODE) |
| parent = parent.parentNode; |
| return parent instanceof ShadowRoot ? parent.getSelection() : this.window().getSelection(); |
| } |
| |
| |
| /** |
| * @return {boolean} |
| */ |
| Node.prototype.isComponentSelectionCollapsed = function() |
| { |
| // FIXME: crbug.com/447523, use selection.isCollapsed when it is fixed for shadow dom. |
| var selection = this.getComponentSelection(); |
| var range = selection && selection.rangeCount ? selection.getRangeAt(0) : null; |
| return range ? range.collapsed : true; |
| } |
| |
| /** |
| * @return {!Selection} |
| */ |
| Node.prototype.getDeepSelection = function() |
| { |
| var activeElement = this.ownerDocument.activeElement; |
| var shadowRoot = null; |
| while (activeElement && activeElement.shadowRoot) { |
| shadowRoot = activeElement.shadowRoot; |
| activeElement = shadowRoot.activeElement; |
| } |
| |
| return shadowRoot ? shadowRoot.getSelection() : this.window().getSelection(); |
| } |
| |
| /** |
| * @return {!Window} |
| */ |
| Node.prototype.window = function() |
| { |
| return this.ownerDocument.defaultView; |
| } |
| |
| /** |
| * @param {string} query |
| * @return {?Node} |
| */ |
| Element.prototype.query = function(query) |
| { |
| return this.ownerDocument.evaluate(query, this, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue; |
| } |
| |
| Element.prototype.removeChildren = function() |
| { |
| if (this.firstChild) |
| this.textContent = ""; |
| } |
| |
| /** |
| * @return {boolean} |
| */ |
| Element.prototype.isInsertionCaretInside = function() |
| { |
| var selection = this.getComponentSelection(); |
| // @see crbug.com/602541 |
| var selectionRange = selection && selection.rangeCount ? selection.getRangeAt(0) : null; |
| if (!selectionRange || !selection.isCollapsed) |
| return false; |
| return selectionRange.startContainer.isSelfOrDescendant(this); |
| } |
| |
| /** |
| * @param {string} tagName |
| * @param {string=} customElementType |
| * @return {!Element} |
| * @suppressGlobalPropertiesCheck |
| */ |
| function createElement(tagName, customElementType) |
| { |
| return document.createElement(tagName, customElementType || ""); |
| } |
| |
| /** |
| * @param {string} type |
| * @param {boolean} bubbles |
| * @param {boolean} cancelable |
| * @return {!Event} |
| * @suppressGlobalPropertiesCheck |
| */ |
| function createEvent(type, bubbles, cancelable) |
| { |
| var event = document.createEvent("Event"); |
| event.initEvent(type, bubbles, cancelable); |
| return event; |
| } |
| |
| /** |
| * @param {number|string} data |
| * @return {!Text} |
| * @suppressGlobalPropertiesCheck |
| */ |
| function createTextNode(data) |
| { |
| return document.createTextNode(data); |
| } |
| |
| /** |
| * @param {string} elementName |
| * @param {string=} className |
| * @param {string=} customElementType |
| * @return {!Element} |
| */ |
| Document.prototype.createElementWithClass = function(elementName, className, customElementType) |
| { |
| var element = this.createElement(elementName, customElementType || ""); |
| if (className) |
| element.className = className; |
| return element; |
| } |
| |
| /** |
| * @param {string} elementName |
| * @param {string=} className |
| * @param {string=} customElementType |
| * @return {!Element} |
| * @suppressGlobalPropertiesCheck |
| */ |
| function createElementWithClass(elementName, className, customElementType) |
| { |
| return document.createElementWithClass(elementName, className, customElementType); |
| } |
| |
| /** |
| * @param {string} childType |
| * @param {string=} className |
| * @return {!Element} |
| */ |
| Document.prototype.createSVGElement = function(childType, className) |
| { |
| var element = this.createElementNS("http://www.w3.org/2000/svg", childType); |
| if (className) |
| element.setAttribute("class", className); |
| return element; |
| } |
| |
| /** |
| * @param {string} childType |
| * @param {string=} className |
| * @return {!Element} |
| * @suppressGlobalPropertiesCheck |
| */ |
| function createSVGElement(childType, className) |
| { |
| return document.createSVGElement(childType, className); |
| } |
| |
| /** |
| * @return {!DocumentFragment} |
| * @suppressGlobalPropertiesCheck |
| */ |
| function createDocumentFragment() |
| { |
| return document.createDocumentFragment(); |
| } |
| |
| /** |
| * @param {string} elementName |
| * @param {string=} className |
| * @param {string=} customElementType |
| * @return {!Element} |
| */ |
| Element.prototype.createChild = function(elementName, className, customElementType) |
| { |
| var element = this.ownerDocument.createElementWithClass(elementName, className, customElementType); |
| this.appendChild(element); |
| return element; |
| } |
| |
| DocumentFragment.prototype.createChild = Element.prototype.createChild; |
| |
| /** |
| * @param {string} text |
| * @return {!Text} |
| */ |
| Element.prototype.createTextChild = function(text) |
| { |
| var element = this.ownerDocument.createTextNode(text); |
| this.appendChild(element); |
| return element; |
| } |
| |
| DocumentFragment.prototype.createTextChild = Element.prototype.createTextChild; |
| |
| /** |
| * @param {...string} var_args |
| */ |
| Element.prototype.createTextChildren = function(var_args) |
| { |
| for (var i = 0, n = arguments.length; i < n; ++i) |
| this.createTextChild(arguments[i]); |
| } |
| |
| DocumentFragment.prototype.createTextChildren = Element.prototype.createTextChildren; |
| |
| /** |
| * @return {number} |
| */ |
| Element.prototype.totalOffsetLeft = function() |
| { |
| return this.totalOffset().left; |
| } |
| |
| /** |
| * @return {number} |
| */ |
| Element.prototype.totalOffsetTop = function() |
| { |
| return this.totalOffset().top; |
| } |
| |
| /** |
| * @return {!{left: number, top: number}} |
| */ |
| Element.prototype.totalOffset = function() |
| { |
| var rect = this.getBoundingClientRect(); |
| return { left: rect.left, top: rect.top }; |
| } |
| |
| /** |
| * @return {!{left: number, top: number}} |
| */ |
| Element.prototype.scrollOffset = function() |
| { |
| var curLeft = 0; |
| var curTop = 0; |
| for (var element = this; element; element = element.scrollParent) { |
| curLeft += element.scrollLeft; |
| curTop += element.scrollTop; |
| } |
| return { left: curLeft, top: curTop }; |
| } |
| |
| /** |
| * @param {string} childType |
| * @param {string=} className |
| * @return {!Element} |
| */ |
| Element.prototype.createSVGChild = function(childType, className) |
| { |
| var child = this.ownerDocument.createSVGElement(childType, className); |
| this.appendChild(child); |
| return child; |
| } |
| |
| /** |
| * @constructor |
| * @param {number=} x |
| * @param {number=} y |
| * @param {number=} width |
| * @param {number=} height |
| */ |
| function AnchorBox(x, y, width, height) |
| { |
| this.x = x || 0; |
| this.y = y || 0; |
| this.width = width || 0; |
| this.height = height || 0; |
| } |
| |
| /** |
| * @param {!AnchorBox} box |
| * @return {!AnchorBox} |
| */ |
| AnchorBox.prototype.relativeTo = function(box) |
| { |
| return new AnchorBox( |
| this.x - box.x, this.y - box.y, this.width, this.height); |
| } |
| |
| /** |
| * @param {!Element} element |
| * @return {!AnchorBox} |
| */ |
| AnchorBox.prototype.relativeToElement = function(element) |
| { |
| return this.relativeTo(element.boxInWindow(element.ownerDocument.defaultView)); |
| } |
| |
| /** |
| * @param {?AnchorBox} anchorBox |
| * @return {boolean} |
| */ |
| AnchorBox.prototype.equals = function(anchorBox) |
| { |
| return !!anchorBox && this.x === anchorBox.x && this.y === anchorBox.y && this.width === anchorBox.width && this.height === anchorBox.height; |
| } |
| |
| /** |
| * @param {!Window} targetWindow |
| * @return {!AnchorBox} |
| */ |
| Element.prototype.offsetRelativeToWindow = function(targetWindow) |
| { |
| var elementOffset = new AnchorBox(); |
| var curElement = this; |
| var curWindow = this.ownerDocument.defaultView; |
| while (curWindow && curElement) { |
| elementOffset.x += curElement.totalOffsetLeft(); |
| elementOffset.y += curElement.totalOffsetTop(); |
| if (curWindow === targetWindow) |
| break; |
| |
| curElement = curWindow.frameElement; |
| curWindow = curWindow.parent; |
| } |
| |
| return elementOffset; |
| } |
| |
| /** |
| * @param {!Window=} targetWindow |
| * @return {!AnchorBox} |
| */ |
| Element.prototype.boxInWindow = function(targetWindow) |
| { |
| targetWindow = targetWindow || this.ownerDocument.defaultView; |
| |
| var anchorBox = this.offsetRelativeToWindow(window); |
| anchorBox.width = Math.min(this.offsetWidth, window.innerWidth - anchorBox.x); |
| anchorBox.height = Math.min(this.offsetHeight, window.innerHeight - anchorBox.y); |
| |
| return anchorBox; |
| } |
| |
| /** |
| * @param {string} text |
| */ |
| Element.prototype.setTextAndTitle = function(text) |
| { |
| this.textContent = text; |
| this.title = text; |
| } |
| |
| KeyboardEvent.prototype.__defineGetter__("data", function() |
| { |
| // Emulate "data" attribute from DOM 3 TextInput event. |
| // See http://www.w3.org/TR/DOM-Level-3-Events/#events-Events-TextEvent-data |
| switch (this.type) { |
| case "keypress": |
| if (!this.ctrlKey && !this.metaKey) |
| return String.fromCharCode(this.charCode); |
| else |
| return ""; |
| case "keydown": |
| case "keyup": |
| if (!this.ctrlKey && !this.metaKey && !this.altKey) |
| return String.fromCharCode(this.which); |
| else |
| return ""; |
| } |
| }); |
| |
| /** |
| * @param {boolean=} preventDefault |
| */ |
| Event.prototype.consume = function(preventDefault) |
| { |
| this.stopImmediatePropagation(); |
| if (preventDefault) |
| this.preventDefault(); |
| this.handled = true; |
| } |
| |
| /** |
| * @param {number=} start |
| * @param {number=} end |
| * @return {!Text} |
| */ |
| Text.prototype.select = function(start, end) |
| { |
| start = start || 0; |
| end = end || this.textContent.length; |
| |
| if (start < 0) |
| start = end + start; |
| |
| var selection = this.getComponentSelection(); |
| selection.removeAllRanges(); |
| var range = this.ownerDocument.createRange(); |
| range.setStart(this, start); |
| range.setEnd(this, end); |
| selection.addRange(range); |
| return this; |
| } |
| |
| /** |
| * @return {?number} |
| */ |
| Element.prototype.selectionLeftOffset = function() |
| { |
| // Calculate selection offset relative to the current element. |
| |
| var selection = this.getComponentSelection(); |
| if (!selection.containsNode(this, true)) |
| return null; |
| |
| var leftOffset = selection.anchorOffset; |
| var node = selection.anchorNode; |
| |
| while (node !== this) { |
| while (node.previousSibling) { |
| node = node.previousSibling; |
| leftOffset += node.textContent.length; |
| } |
| node = node.parentNodeOrShadowHost(); |
| } |
| |
| return leftOffset; |
| } |
| |
| /** |
| * @this {!HTMLImageElement} element |
| * @return {!Promise<!HTMLImageElement>} |
| */ |
| HTMLImageElement.prototype.completePromise = function() |
| { |
| var element = this; |
| if (element.complete) |
| return Promise.resolve(element); |
| return new Promise(promiseBody); |
| |
| /** |
| * @param {function(!HTMLImageElement)} resolve |
| */ |
| function promiseBody(resolve) |
| { |
| element.addEventListener("load", oncomplete); |
| element.addEventListener("error", oncomplete); |
| |
| function oncomplete() |
| { |
| resolve(element); |
| } |
| } |
| } |
| |
| /** |
| * @param {...!Node} var_args |
| */ |
| Node.prototype.appendChildren = function(var_args) |
| { |
| for (var i = 0, n = arguments.length; i < n; ++i) |
| this.appendChild(arguments[i]); |
| } |
| |
| /** |
| * @return {string} |
| */ |
| Node.prototype.deepTextContent = function() |
| { |
| return this.childTextNodes().map(function(node) { return node.textContent; }).join(""); |
| } |
| |
| /** |
| * @return {!Array.<!Node>} |
| */ |
| Node.prototype.childTextNodes = function() |
| { |
| var node = this.traverseNextTextNode(this); |
| var result = []; |
| var nonTextTags = { "STYLE": 1, "SCRIPT": 1 }; |
| while (node) { |
| if (!nonTextTags[node.parentElement.nodeName]) |
| result.push(node); |
| node = node.traverseNextTextNode(this); |
| } |
| return result; |
| } |
| |
| /** |
| * @param {?Node} node |
| * @return {boolean} |
| */ |
| Node.prototype.isAncestor = function(node) |
| { |
| if (!node) |
| return false; |
| |
| var currentNode = node.parentNodeOrShadowHost(); |
| while (currentNode) { |
| if (this === currentNode) |
| return true; |
| currentNode = currentNode.parentNodeOrShadowHost(); |
| } |
| return false; |
| } |
| |
| /** |
| * @param {?Node} descendant |
| * @return {boolean} |
| */ |
| Node.prototype.isDescendant = function(descendant) |
| { |
| return !!descendant && descendant.isAncestor(this); |
| } |
| |
| /** |
| * @param {?Node} node |
| * @return {boolean} |
| */ |
| Node.prototype.isSelfOrAncestor = function(node) |
| { |
| return !!node && (node === this || this.isAncestor(node)); |
| } |
| |
| /** |
| * @param {?Node} node |
| * @return {boolean} |
| */ |
| Node.prototype.isSelfOrDescendant = function(node) |
| { |
| return !!node && (node === this || this.isDescendant(node)); |
| } |
| |
| /** |
| * @param {!Node=} stayWithin |
| * @return {?Node} |
| */ |
| Node.prototype.traverseNextNode = function(stayWithin) |
| { |
| if (this.shadowRoot) |
| return this.shadowRoot; |
| |
| var distributedNodes = this.getDistributedNodes ? this.getDistributedNodes() : []; |
| |
| if (distributedNodes.length) |
| return distributedNodes[0]; |
| |
| if (this.firstChild) |
| return this.firstChild; |
| |
| var node = this; |
| while (node) { |
| if (stayWithin && node === stayWithin) |
| return null; |
| |
| var sibling = nextSibling(node); |
| if (sibling) |
| return sibling; |
| |
| node = insertionPoint(node) || node.parentNodeOrShadowHost(); |
| } |
| |
| /** |
| * @param {!Node} node |
| * @return {?Node} |
| */ |
| function nextSibling(node) |
| { |
| var parent = insertionPoint(node); |
| if (!parent) |
| return node.nextSibling; |
| var distributedNodes = parent.getDistributedNodes ? parent.getDistributedNodes() : []; |
| |
| var position = Array.prototype.indexOf.call(distributedNodes, node); |
| if (position + 1 < distributedNodes.length) |
| return distributedNodes[position + 1]; |
| return null; |
| } |
| |
| /** |
| * @param {!Node} node |
| * @return {?Node} |
| */ |
| function insertionPoint(node) |
| { |
| var insertionPoints = node.getDestinationInsertionPoints ? node.getDestinationInsertionPoints() : []; |
| return insertionPoints.length > 0 ? insertionPoints[insertionPoints.length - 1] : null; |
| } |
| |
| return null; |
| } |
| |
| /** |
| * @param {!Node=} stayWithin |
| * @return {?Node} |
| */ |
| Node.prototype.traversePreviousNode = function(stayWithin) |
| { |
| if (stayWithin && this === stayWithin) |
| return null; |
| var node = this.previousSibling; |
| while (node && node.lastChild) |
| node = node.lastChild; |
| if (node) |
| return node; |
| return this.parentNodeOrShadowHost(); |
| } |
| |
| /** |
| * @param {*} text |
| * @param {string=} placeholder |
| * @return {boolean} true if was truncated |
| */ |
| Node.prototype.setTextContentTruncatedIfNeeded = function(text, placeholder) |
| { |
| // Huge texts in the UI reduce rendering performance drastically. |
| // Moreover, Blink/WebKit uses <unsigned short> internally for storing text content |
| // length, so texts longer than 65535 are inherently displayed incorrectly. |
| const maxTextContentLength = 10000; |
| |
| if (typeof text === "string" && text.length > maxTextContentLength) { |
| this.textContent = typeof placeholder === "string" ? placeholder : text.trimMiddle(maxTextContentLength); |
| return true; |
| } |
| |
| this.textContent = text; |
| return false; |
| } |
| |
| /** |
| * @return {?Node} |
| */ |
| Event.prototype.deepElementFromPoint = function() |
| { |
| // 1. climb to the component root. |
| var node = this.target; |
| while (node && node.nodeType !== Node.DOCUMENT_FRAGMENT_NODE && node.nodeType !== Node.DOCUMENT_NODE) |
| node = node.parentNode; |
| |
| if (!node) |
| return null; |
| |
| // 2. Find deepest node by coordinates. |
| node = node.elementFromPoint(this.pageX, this.pageY); |
| while (node && node.shadowRoot) |
| node = node.shadowRoot.elementFromPoint(this.pageX, this.pageY); |
| return node; |
| } |
| |
| /** |
| * @return {?Element} |
| */ |
| Event.prototype.deepActiveElement = function() |
| { |
| var activeElement = this.target && this.target.ownerDocument ? this.target.ownerDocument.activeElement : null; |
| while (activeElement && activeElement.shadowRoot) |
| activeElement = activeElement.shadowRoot.activeElement; |
| return activeElement; |
| } |
| |
| /** |
| * @param {number} x |
| * @param {number} y |
| * @return {?Node} |
| */ |
| Document.prototype.deepElementFromPoint = function(x, y) |
| { |
| var node = this.elementFromPoint(x, y); |
| while (node && node.shadowRoot) |
| node = node.shadowRoot.elementFromPoint(x, y); |
| return node; |
| } |
| |
| /** |
| * @param {!Event} event |
| * @return {boolean} |
| */ |
| function isEnterKey(event) |
| { |
| // Check if in IME. |
| return event.keyCode !== 229 && event.key === "Enter"; |
| } |
| |
| /** |
| * @param {!Event} event |
| * @return {boolean} |
| */ |
| function isEscKey(event) |
| { |
| return event.keyCode === 27; |
| } |
| |
| function consumeEvent(e) |
| { |
| e.consume(); |
| } |
| |
| /** |
| * @param {function()} callback |
| * @suppressGlobalPropertiesCheck |
| */ |
| function runOnWindowLoad(callback) |
| { |
| /** |
| * @suppressGlobalPropertiesCheck |
| */ |
| function windowLoaded() |
| { |
| window.removeEventListener("DOMContentLoaded", windowLoaded, false); |
| callback(); |
| } |
| |
| if (document.readyState === "complete" || document.readyState === "interactive") |
| callback(); |
| else |
| window.addEventListener("DOMContentLoaded", windowLoaded, false); |
| } |