summaryrefslogtreecommitdiff
path: root/src/http/static/viz/1/goog/dom
diff options
context:
space:
mode:
Diffstat (limited to 'src/http/static/viz/1/goog/dom')
-rw-r--r--src/http/static/viz/1/goog/dom/browserfeature.js73
-rw-r--r--src/http/static/viz/1/goog/dom/dom.js2992
-rw-r--r--src/http/static/viz/1/goog/dom/nodetype.js48
-rw-r--r--src/http/static/viz/1/goog/dom/safe.js372
-rw-r--r--src/http/static/viz/1/goog/dom/tagname.js160
-rw-r--r--src/http/static/viz/1/goog/dom/tags.js41
6 files changed, 3686 insertions, 0 deletions
diff --git a/src/http/static/viz/1/goog/dom/browserfeature.js b/src/http/static/viz/1/goog/dom/browserfeature.js
new file mode 100644
index 0000000..1172166
--- /dev/null
+++ b/src/http/static/viz/1/goog/dom/browserfeature.js
@@ -0,0 +1,73 @@
+// Copyright 2010 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Browser capability checks for the dom package.
+ *
+ */
+
+
+goog.provide('goog.dom.BrowserFeature');
+
+goog.require('goog.userAgent');
+
+
+/**
+ * Enum of browser capabilities.
+ * @enum {boolean}
+ */
+goog.dom.BrowserFeature = {
+ /**
+ * Whether attributes 'name' and 'type' can be added to an element after it's
+ * created. False in Internet Explorer prior to version 9.
+ */
+ CAN_ADD_NAME_OR_TYPE_ATTRIBUTES:
+ !goog.userAgent.IE || goog.userAgent.isDocumentModeOrHigher(9),
+
+ /**
+ * Whether we can use element.children to access an element's Element
+ * children. Available since Gecko 1.9.1, IE 9. (IE<9 also includes comment
+ * nodes in the collection.)
+ */
+ CAN_USE_CHILDREN_ATTRIBUTE: !goog.userAgent.GECKO && !goog.userAgent.IE ||
+ goog.userAgent.IE && goog.userAgent.isDocumentModeOrHigher(9) ||
+ goog.userAgent.GECKO && goog.userAgent.isVersionOrHigher('1.9.1'),
+
+ /**
+ * Opera, Safari 3, and Internet Explorer 9 all support innerText but they
+ * include text nodes in script and style tags. Not document-mode-dependent.
+ */
+ CAN_USE_INNER_TEXT:
+ (goog.userAgent.IE && !goog.userAgent.isVersionOrHigher('9')),
+
+ /**
+ * MSIE, Opera, and Safari>=4 support element.parentElement to access an
+ * element's parent if it is an Element.
+ */
+ CAN_USE_PARENT_ELEMENT_PROPERTY:
+ goog.userAgent.IE || goog.userAgent.OPERA || goog.userAgent.WEBKIT,
+
+ /**
+ * Whether NoScope elements need a scoped element written before them in
+ * innerHTML.
+ * MSDN: http://msdn.microsoft.com/en-us/library/ms533897(VS.85).aspx#1
+ */
+ INNER_HTML_NEEDS_SCOPED_ELEMENT: goog.userAgent.IE,
+
+ /**
+ * Whether we use legacy IE range API.
+ */
+ LEGACY_IE_RANGES:
+ goog.userAgent.IE && !goog.userAgent.isDocumentModeOrHigher(9)
+};
diff --git a/src/http/static/viz/1/goog/dom/dom.js b/src/http/static/viz/1/goog/dom/dom.js
new file mode 100644
index 0000000..4d3cdf9
--- /dev/null
+++ b/src/http/static/viz/1/goog/dom/dom.js
@@ -0,0 +1,2992 @@
+// Copyright 2006 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Utilities for manipulating the browser's Document Object Model
+ * Inspiration taken *heavily* from mochikit (http://mochikit.com/).
+ *
+ * You can use {@link goog.dom.DomHelper} to create new dom helpers that refer
+ * to a different document object. This is useful if you are working with
+ * frames or multiple windows.
+ *
+ * @author arv@google.com (Erik Arvidsson)
+ */
+
+
+// TODO(arv): Rename/refactor getTextContent and getRawTextContent. The problem
+// is that getTextContent should mimic the DOM3 textContent. We should add a
+// getInnerText (or getText) which tries to return the visible text, innerText.
+
+
+goog.provide('goog.dom');
+goog.provide('goog.dom.Appendable');
+goog.provide('goog.dom.DomHelper');
+
+goog.require('goog.array');
+goog.require('goog.asserts');
+goog.require('goog.dom.BrowserFeature');
+goog.require('goog.dom.NodeType');
+goog.require('goog.dom.TagName');
+goog.require('goog.dom.safe');
+goog.require('goog.html.SafeHtml');
+goog.require('goog.html.uncheckedconversions');
+goog.require('goog.math.Coordinate');
+goog.require('goog.math.Size');
+goog.require('goog.object');
+goog.require('goog.string');
+goog.require('goog.string.Unicode');
+goog.require('goog.userAgent');
+
+
+/**
+ * @define {boolean} Whether we know at compile time that the browser is in
+ * quirks mode.
+ */
+goog.define('goog.dom.ASSUME_QUIRKS_MODE', false);
+
+
+/**
+ * @define {boolean} Whether we know at compile time that the browser is in
+ * standards compliance mode.
+ */
+goog.define('goog.dom.ASSUME_STANDARDS_MODE', false);
+
+
+/**
+ * Whether we know the compatibility mode at compile time.
+ * @type {boolean}
+ * @private
+ */
+goog.dom.COMPAT_MODE_KNOWN_ =
+ goog.dom.ASSUME_QUIRKS_MODE || goog.dom.ASSUME_STANDARDS_MODE;
+
+
+/**
+ * Gets the DomHelper object for the document where the element resides.
+ * @param {(Node|Window)=} opt_element If present, gets the DomHelper for this
+ * element.
+ * @return {!goog.dom.DomHelper} The DomHelper.
+ */
+goog.dom.getDomHelper = function(opt_element) {
+ return opt_element ?
+ new goog.dom.DomHelper(goog.dom.getOwnerDocument(opt_element)) :
+ (goog.dom.defaultDomHelper_ ||
+ (goog.dom.defaultDomHelper_ = new goog.dom.DomHelper()));
+};
+
+
+/**
+ * Cached default DOM helper.
+ * @type {!goog.dom.DomHelper|undefined}
+ * @private
+ */
+goog.dom.defaultDomHelper_;
+
+
+/**
+ * Gets the document object being used by the dom library.
+ * @return {!Document} Document object.
+ */
+goog.dom.getDocument = function() {
+ return document;
+};
+
+
+/**
+ * Gets an element from the current document by element id.
+ *
+ * If an Element is passed in, it is returned.
+ *
+ * @param {string|Element} element Element ID or a DOM node.
+ * @return {Element} The element with the given ID, or the node passed in.
+ */
+goog.dom.getElement = function(element) {
+ return goog.dom.getElementHelper_(document, element);
+};
+
+
+/**
+ * Gets an element by id from the given document (if present).
+ * If an element is given, it is returned.
+ * @param {!Document} doc
+ * @param {string|Element} element Element ID or a DOM node.
+ * @return {Element} The resulting element.
+ * @private
+ */
+goog.dom.getElementHelper_ = function(doc, element) {
+ return goog.isString(element) ? doc.getElementById(element) : element;
+};
+
+
+/**
+ * Gets an element by id, asserting that the element is found.
+ *
+ * This is used when an element is expected to exist, and should fail with
+ * an assertion error if it does not (if assertions are enabled).
+ *
+ * @param {string} id Element ID.
+ * @return {!Element} The element with the given ID, if it exists.
+ */
+goog.dom.getRequiredElement = function(id) {
+ return goog.dom.getRequiredElementHelper_(document, id);
+};
+
+
+/**
+ * Helper function for getRequiredElementHelper functions, both static and
+ * on DomHelper. Asserts the element with the given id exists.
+ * @param {!Document} doc
+ * @param {string} id
+ * @return {!Element} The element with the given ID, if it exists.
+ * @private
+ */
+goog.dom.getRequiredElementHelper_ = function(doc, id) {
+ // To prevent users passing in Elements as is permitted in getElement().
+ goog.asserts.assertString(id);
+ var element = goog.dom.getElementHelper_(doc, id);
+ element =
+ goog.asserts.assertElement(element, 'No element found with id: ' + id);
+ return element;
+};
+
+
+/**
+ * Alias for getElement.
+ * @param {string|Element} element Element ID or a DOM node.
+ * @return {Element} The element with the given ID, or the node passed in.
+ * @deprecated Use {@link goog.dom.getElement} instead.
+ */
+goog.dom.$ = goog.dom.getElement;
+
+
+/**
+ * Looks up elements by both tag and class name, using browser native functions
+ * ({@code querySelectorAll}, {@code getElementsByTagName} or
+ * {@code getElementsByClassName}) where possible. This function
+ * is a useful, if limited, way of collecting a list of DOM elements
+ * with certain characteristics. {@code goog.dom.query} offers a
+ * more powerful and general solution which allows matching on CSS3
+ * selector expressions, but at increased cost in code size. If all you
+ * need is particular tags belonging to a single class, this function
+ * is fast and sleek.
+ *
+ * Note that tag names are case sensitive in the SVG namespace, and this
+ * function converts opt_tag to uppercase for comparisons. For queries in the
+ * SVG namespace you should use querySelector or querySelectorAll instead.
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=963870
+ * https://bugs.webkit.org/show_bug.cgi?id=83438
+ *
+ * @see {goog.dom.query}
+ *
+ * @param {?string=} opt_tag Element tag name.
+ * @param {?string=} opt_class Optional class name.
+ * @param {(Document|Element)=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} Array-like list of elements (only a length
+ * property and numerical indices are guaranteed to exist).
+ */
+goog.dom.getElementsByTagNameAndClass = function(opt_tag, opt_class, opt_el) {
+ return goog.dom.getElementsByTagNameAndClass_(
+ document, opt_tag, opt_class, opt_el);
+};
+
+
+/**
+ * Returns a static, array-like list of the elements with the provided
+ * className.
+ * @see {goog.dom.query}
+ * @param {string} className the name of the class to look for.
+ * @param {(Document|Element)=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} The items found with the class name provided.
+ */
+goog.dom.getElementsByClass = function(className, opt_el) {
+ var parent = opt_el || document;
+ if (goog.dom.canUseQuerySelector_(parent)) {
+ return parent.querySelectorAll('.' + className);
+ }
+ return goog.dom.getElementsByTagNameAndClass_(
+ document, '*', className, opt_el);
+};
+
+
+/**
+ * Returns the first element with the provided className.
+ * @see {goog.dom.query}
+ * @param {string} className the name of the class to look for.
+ * @param {Element|Document=} opt_el Optional element to look in.
+ * @return {Element} The first item with the class name provided.
+ */
+goog.dom.getElementByClass = function(className, opt_el) {
+ var parent = opt_el || document;
+ var retVal = null;
+ if (parent.getElementsByClassName) {
+ retVal = parent.getElementsByClassName(className)[0];
+ } else if (goog.dom.canUseQuerySelector_(parent)) {
+ retVal = parent.querySelector('.' + className);
+ } else {
+ retVal = goog.dom.getElementsByTagNameAndClass_(
+ document, '*', className, opt_el)[0];
+ }
+ return retVal || null;
+};
+
+
+/**
+ * Ensures an element with the given className exists, and then returns the
+ * first element with the provided className.
+ * @see {goog.dom.query}
+ * @param {string} className the name of the class to look for.
+ * @param {!Element|!Document=} opt_root Optional element or document to look
+ * in.
+ * @return {!Element} The first item with the class name provided.
+ * @throws {goog.asserts.AssertionError} Thrown if no element is found.
+ */
+goog.dom.getRequiredElementByClass = function(className, opt_root) {
+ var retValue = goog.dom.getElementByClass(className, opt_root);
+ return goog.asserts.assert(
+ retValue, 'No element found with className: ' + className);
+};
+
+
+/**
+ * Prefer the standardized (http://www.w3.org/TR/selectors-api/), native and
+ * fast W3C Selectors API.
+ * @param {!(Element|Document)} parent The parent document object.
+ * @return {boolean} whether or not we can use parent.querySelector* APIs.
+ * @private
+ */
+goog.dom.canUseQuerySelector_ = function(parent) {
+ return !!(parent.querySelectorAll && parent.querySelector);
+};
+
+
+/**
+ * Helper for {@code getElementsByTagNameAndClass}.
+ * @param {!Document} doc The document to get the elements in.
+ * @param {?string=} opt_tag Element tag name.
+ * @param {?string=} opt_class Optional class name.
+ * @param {(Document|Element)=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} Array-like list of elements (only a length
+ * property and numerical indices are guaranteed to exist).
+ * @private
+ */
+goog.dom.getElementsByTagNameAndClass_ = function(
+ doc, opt_tag, opt_class, opt_el) {
+ var parent = opt_el || doc;
+ var tagName = (opt_tag && opt_tag != '*') ? opt_tag.toUpperCase() : '';
+
+ if (goog.dom.canUseQuerySelector_(parent) && (tagName || opt_class)) {
+ var query = tagName + (opt_class ? '.' + opt_class : '');
+ return parent.querySelectorAll(query);
+ }
+
+ // Use the native getElementsByClassName if available, under the assumption
+ // that even when the tag name is specified, there will be fewer elements to
+ // filter through when going by class than by tag name
+ if (opt_class && parent.getElementsByClassName) {
+ var els = parent.getElementsByClassName(opt_class);
+
+ if (tagName) {
+ var arrayLike = {};
+ var len = 0;
+
+ // Filter for specific tags if requested.
+ for (var i = 0, el; el = els[i]; i++) {
+ if (tagName == el.nodeName) {
+ arrayLike[len++] = el;
+ }
+ }
+ arrayLike.length = len;
+
+ return /** @type {!IArrayLike<!Element>} */ (arrayLike);
+ } else {
+ return els;
+ }
+ }
+
+ var els = parent.getElementsByTagName(tagName || '*');
+
+ if (opt_class) {
+ var arrayLike = {};
+ var len = 0;
+ for (var i = 0, el; el = els[i]; i++) {
+ var className = el.className;
+ // Check if className has a split function since SVG className does not.
+ if (typeof className.split == 'function' &&
+ goog.array.contains(className.split(/\s+/), opt_class)) {
+ arrayLike[len++] = el;
+ }
+ }
+ arrayLike.length = len;
+ return /** @type {!IArrayLike<!Element>} */ (arrayLike);
+ } else {
+ return els;
+ }
+};
+
+
+/**
+ * Alias for {@code getElementsByTagNameAndClass}.
+ * @param {?string=} opt_tag Element tag name.
+ * @param {?string=} opt_class Optional class name.
+ * @param {Element=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} Array-like list of elements (only a length
+ * property and numerical indices are guaranteed to exist).
+ * @deprecated Use {@link goog.dom.getElementsByTagNameAndClass} instead.
+ */
+goog.dom.$$ = goog.dom.getElementsByTagNameAndClass;
+
+
+/**
+ * Sets multiple properties on a node.
+ * @param {Element} element DOM node to set properties on.
+ * @param {Object} properties Hash of property:value pairs.
+ */
+goog.dom.setProperties = function(element, properties) {
+ goog.object.forEach(properties, function(val, key) {
+ if (key == 'style') {
+ element.style.cssText = val;
+ } else if (key == 'class') {
+ element.className = val;
+ } else if (key == 'for') {
+ element.htmlFor = val;
+ } else if (goog.dom.DIRECT_ATTRIBUTE_MAP_.hasOwnProperty(key)) {
+ element.setAttribute(goog.dom.DIRECT_ATTRIBUTE_MAP_[key], val);
+ } else if (
+ goog.string.startsWith(key, 'aria-') ||
+ goog.string.startsWith(key, 'data-')) {
+ element.setAttribute(key, val);
+ } else {
+ element[key] = val;
+ }
+ });
+};
+
+
+/**
+ * Map of attributes that should be set using
+ * element.setAttribute(key, val) instead of element[key] = val. Used
+ * by goog.dom.setProperties.
+ *
+ * @private {!Object<string, string>}
+ * @const
+ */
+goog.dom.DIRECT_ATTRIBUTE_MAP_ = {
+ 'cellpadding': 'cellPadding',
+ 'cellspacing': 'cellSpacing',
+ 'colspan': 'colSpan',
+ 'frameborder': 'frameBorder',
+ 'height': 'height',
+ 'maxlength': 'maxLength',
+ 'nonce': 'nonce',
+ 'role': 'role',
+ 'rowspan': 'rowSpan',
+ 'type': 'type',
+ 'usemap': 'useMap',
+ 'valign': 'vAlign',
+ 'width': 'width'
+};
+
+
+/**
+ * Gets the dimensions of the viewport.
+ *
+ * Gecko Standards mode:
+ * docEl.clientWidth Width of viewport excluding scrollbar.
+ * win.innerWidth Width of viewport including scrollbar.
+ * body.clientWidth Width of body element.
+ *
+ * docEl.clientHeight Height of viewport excluding scrollbar.
+ * win.innerHeight Height of viewport including scrollbar.
+ * body.clientHeight Height of document.
+ *
+ * Gecko Backwards compatible mode:
+ * docEl.clientWidth Width of viewport excluding scrollbar.
+ * win.innerWidth Width of viewport including scrollbar.
+ * body.clientWidth Width of viewport excluding scrollbar.
+ *
+ * docEl.clientHeight Height of document.
+ * win.innerHeight Height of viewport including scrollbar.
+ * body.clientHeight Height of viewport excluding scrollbar.
+ *
+ * IE6/7 Standards mode:
+ * docEl.clientWidth Width of viewport excluding scrollbar.
+ * win.innerWidth Undefined.
+ * body.clientWidth Width of body element.
+ *
+ * docEl.clientHeight Height of viewport excluding scrollbar.
+ * win.innerHeight Undefined.
+ * body.clientHeight Height of document element.
+ *
+ * IE5 + IE6/7 Backwards compatible mode:
+ * docEl.clientWidth 0.
+ * win.innerWidth Undefined.
+ * body.clientWidth Width of viewport excluding scrollbar.
+ *
+ * docEl.clientHeight 0.
+ * win.innerHeight Undefined.
+ * body.clientHeight Height of viewport excluding scrollbar.
+ *
+ * Opera 9 Standards and backwards compatible mode:
+ * docEl.clientWidth Width of viewport excluding scrollbar.
+ * win.innerWidth Width of viewport including scrollbar.
+ * body.clientWidth Width of viewport excluding scrollbar.
+ *
+ * docEl.clientHeight Height of document.
+ * win.innerHeight Height of viewport including scrollbar.
+ * body.clientHeight Height of viewport excluding scrollbar.
+ *
+ * WebKit:
+ * Safari 2
+ * docEl.clientHeight Same as scrollHeight.
+ * docEl.clientWidth Same as innerWidth.
+ * win.innerWidth Width of viewport excluding scrollbar.
+ * win.innerHeight Height of the viewport including scrollbar.
+ * frame.innerHeight Height of the viewport exluding scrollbar.
+ *
+ * Safari 3 (tested in 522)
+ *
+ * docEl.clientWidth Width of viewport excluding scrollbar.
+ * docEl.clientHeight Height of viewport excluding scrollbar in strict mode.
+ * body.clientHeight Height of viewport excluding scrollbar in quirks mode.
+ *
+ * @param {Window=} opt_window Optional window element to test.
+ * @return {!goog.math.Size} Object with values 'width' and 'height'.
+ */
+goog.dom.getViewportSize = function(opt_window) {
+ // TODO(arv): This should not take an argument
+ return goog.dom.getViewportSize_(opt_window || window);
+};
+
+
+/**
+ * Helper for {@code getViewportSize}.
+ * @param {Window} win The window to get the view port size for.
+ * @return {!goog.math.Size} Object with values 'width' and 'height'.
+ * @private
+ */
+goog.dom.getViewportSize_ = function(win) {
+ var doc = win.document;
+ var el = goog.dom.isCss1CompatMode_(doc) ? doc.documentElement : doc.body;
+ return new goog.math.Size(el.clientWidth, el.clientHeight);
+};
+
+
+/**
+ * Calculates the height of the document.
+ *
+ * @return {number} The height of the current document.
+ */
+goog.dom.getDocumentHeight = function() {
+ return goog.dom.getDocumentHeight_(window);
+};
+
+/**
+ * Calculates the height of the document of the given window.
+ *
+ * @param {!Window} win The window whose document height to retrieve.
+ * @return {number} The height of the document of the given window.
+ */
+goog.dom.getDocumentHeightForWindow = function(win) {
+ return goog.dom.getDocumentHeight_(win);
+};
+
+/**
+ * Calculates the height of the document of the given window.
+ *
+ * Function code copied from the opensocial gadget api:
+ * gadgets.window.adjustHeight(opt_height)
+ *
+ * @private
+ * @param {!Window} win The window whose document height to retrieve.
+ * @return {number} The height of the document of the given window.
+ */
+goog.dom.getDocumentHeight_ = function(win) {
+ // NOTE(eae): This method will return the window size rather than the document
+ // size in webkit quirks mode.
+ var doc = win.document;
+ var height = 0;
+
+ if (doc) {
+ // Calculating inner content height is hard and different between
+ // browsers rendering in Strict vs. Quirks mode. We use a combination of
+ // three properties within document.body and document.documentElement:
+ // - scrollHeight
+ // - offsetHeight
+ // - clientHeight
+ // These values differ significantly between browsers and rendering modes.
+ // But there are patterns. It just takes a lot of time and persistence
+ // to figure out.
+
+ var body = doc.body;
+ var docEl = /** @type {!HTMLElement} */ (doc.documentElement);
+ if (!(docEl && body)) {
+ return 0;
+ }
+
+ // Get the height of the viewport
+ var vh = goog.dom.getViewportSize_(win).height;
+ if (goog.dom.isCss1CompatMode_(doc) && docEl.scrollHeight) {
+ // In Strict mode:
+ // The inner content height is contained in either:
+ // document.documentElement.scrollHeight
+ // document.documentElement.offsetHeight
+ // Based on studying the values output by different browsers,
+ // use the value that's NOT equal to the viewport height found above.
+ height =
+ docEl.scrollHeight != vh ? docEl.scrollHeight : docEl.offsetHeight;
+ } else {
+ // In Quirks mode:
+ // documentElement.clientHeight is equal to documentElement.offsetHeight
+ // except in IE. In most browsers, document.documentElement can be used
+ // to calculate the inner content height.
+ // However, in other browsers (e.g. IE), document.body must be used
+ // instead. How do we know which one to use?
+ // If document.documentElement.clientHeight does NOT equal
+ // document.documentElement.offsetHeight, then use document.body.
+ var sh = docEl.scrollHeight;
+ var oh = docEl.offsetHeight;
+ if (docEl.clientHeight != oh) {
+ sh = body.scrollHeight;
+ oh = body.offsetHeight;
+ }
+
+ // Detect whether the inner content height is bigger or smaller
+ // than the bounding box (viewport). If bigger, take the larger
+ // value. If smaller, take the smaller value.
+ if (sh > vh) {
+ // Content is larger
+ height = sh > oh ? sh : oh;
+ } else {
+ // Content is smaller
+ height = sh < oh ? sh : oh;
+ }
+ }
+ }
+
+ return height;
+};
+
+
+/**
+ * Gets the page scroll distance as a coordinate object.
+ *
+ * @param {Window=} opt_window Optional window element to test.
+ * @return {!goog.math.Coordinate} Object with values 'x' and 'y'.
+ * @deprecated Use {@link goog.dom.getDocumentScroll} instead.
+ */
+goog.dom.getPageScroll = function(opt_window) {
+ var win = opt_window || goog.global || window;
+ return goog.dom.getDomHelper(win.document).getDocumentScroll();
+};
+
+
+/**
+ * Gets the document scroll distance as a coordinate object.
+ *
+ * @return {!goog.math.Coordinate} Object with values 'x' and 'y'.
+ */
+goog.dom.getDocumentScroll = function() {
+ return goog.dom.getDocumentScroll_(document);
+};
+
+
+/**
+ * Helper for {@code getDocumentScroll}.
+ *
+ * @param {!Document} doc The document to get the scroll for.
+ * @return {!goog.math.Coordinate} Object with values 'x' and 'y'.
+ * @private
+ */
+goog.dom.getDocumentScroll_ = function(doc) {
+ var el = goog.dom.getDocumentScrollElement_(doc);
+ var win = goog.dom.getWindow_(doc);
+ if (goog.userAgent.IE && goog.userAgent.isVersionOrHigher('10') &&
+ win.pageYOffset != el.scrollTop) {
+ // The keyboard on IE10 touch devices shifts the page using the pageYOffset
+ // without modifying scrollTop. For this case, we want the body scroll
+ // offsets.
+ return new goog.math.Coordinate(el.scrollLeft, el.scrollTop);
+ }
+ return new goog.math.Coordinate(
+ win.pageXOffset || el.scrollLeft, win.pageYOffset || el.scrollTop);
+};
+
+
+/**
+ * Gets the document scroll element.
+ * @return {!Element} Scrolling element.
+ */
+goog.dom.getDocumentScrollElement = function() {
+ return goog.dom.getDocumentScrollElement_(document);
+};
+
+
+/**
+ * Helper for {@code getDocumentScrollElement}.
+ * @param {!Document} doc The document to get the scroll element for.
+ * @return {!Element} Scrolling element.
+ * @private
+ */
+goog.dom.getDocumentScrollElement_ = function(doc) {
+ // Old WebKit needs body.scrollLeft in both quirks mode and strict mode. We
+ // also default to the documentElement if the document does not have a body
+ // (e.g. a SVG document).
+ // Uses http://dev.w3.org/csswg/cssom-view/#dom-document-scrollingelement to
+ // avoid trying to guess about browser behavior from the UA string.
+ if (doc.scrollingElement) {
+ return doc.scrollingElement;
+ }
+ if (!goog.userAgent.WEBKIT && goog.dom.isCss1CompatMode_(doc)) {
+ return doc.documentElement;
+ }
+ return doc.body || doc.documentElement;
+};
+
+
+/**
+ * Gets the window object associated with the given document.
+ *
+ * @param {Document=} opt_doc Document object to get window for.
+ * @return {!Window} The window associated with the given document.
+ */
+goog.dom.getWindow = function(opt_doc) {
+ // TODO(arv): This should not take an argument.
+ return opt_doc ? goog.dom.getWindow_(opt_doc) : window;
+};
+
+
+/**
+ * Helper for {@code getWindow}.
+ *
+ * @param {!Document} doc Document object to get window for.
+ * @return {!Window} The window associated with the given document.
+ * @private
+ */
+goog.dom.getWindow_ = function(doc) {
+ return doc.parentWindow || doc.defaultView;
+};
+
+
+/**
+ * Returns a dom node with a set of attributes. This function accepts varargs
+ * for subsequent nodes to be added. Subsequent nodes will be added to the
+ * first node as childNodes.
+ *
+ * So:
+ * <code>createDom('div', null, createDom('p'), createDom('p'));</code>
+ * would return a div with two child paragraphs
+ *
+ * @param {string} tagName Tag to create.
+ * @param {(Object|Array<string>|string)=} opt_attributes If object, then a map
+ * of name-value pairs for attributes. If a string, then this is the
+ * className of the new element. If an array, the elements will be joined
+ * together as the className of the new element.
+ * @param {...(Object|string|Array|NodeList)} var_args Further DOM nodes or
+ * strings for text nodes. If one of the var_args is an array or NodeList,
+ * its elements will be added as childNodes instead.
+ * @return {!Element} Reference to a DOM node.
+ */
+goog.dom.createDom = function(tagName, opt_attributes, var_args) {
+ return goog.dom.createDom_(document, arguments);
+};
+
+
+/**
+ * Helper for {@code createDom}.
+ * @param {!Document} doc The document to create the DOM in.
+ * @param {!Arguments} args Argument object passed from the callers. See
+ * {@code goog.dom.createDom} for details.
+ * @return {!Element} Reference to a DOM node.
+ * @private
+ */
+goog.dom.createDom_ = function(doc, args) {
+ var tagName = args[0];
+ var attributes = args[1];
+
+ // Internet Explorer is dumb:
+ // name: https://msdn.microsoft.com/en-us/library/ms534184(v=vs.85).aspx
+ // type: https://msdn.microsoft.com/en-us/library/ms534700(v=vs.85).aspx
+ // Also does not allow setting of 'type' attribute on 'input' or 'button'.
+ if (!goog.dom.BrowserFeature.CAN_ADD_NAME_OR_TYPE_ATTRIBUTES && attributes &&
+ (attributes.name || attributes.type)) {
+ var tagNameArr = ['<', tagName];
+ if (attributes.name) {
+ tagNameArr.push(' name="', goog.string.htmlEscape(attributes.name), '"');
+ }
+ if (attributes.type) {
+ tagNameArr.push(' type="', goog.string.htmlEscape(attributes.type), '"');
+
+ // Clone attributes map to remove 'type' without mutating the input.
+ var clone = {};
+ goog.object.extend(clone, attributes);
+
+ // JSCompiler can't see how goog.object.extend added this property,
+ // because it was essentially added by reflection.
+ // So it needs to be quoted.
+ delete clone['type'];
+
+ attributes = clone;
+ }
+ tagNameArr.push('>');
+ tagName = tagNameArr.join('');
+ }
+
+ var element = doc.createElement(tagName);
+
+ if (attributes) {
+ if (goog.isString(attributes)) {
+ element.className = attributes;
+ } else if (goog.isArray(attributes)) {
+ element.className = attributes.join(' ');
+ } else {
+ goog.dom.setProperties(element, attributes);
+ }
+ }
+
+ if (args.length > 2) {
+ goog.dom.append_(doc, element, args, 2);
+ }
+
+ return element;
+};
+
+
+/**
+ * Appends a node with text or other nodes.
+ * @param {!Document} doc The document to create new nodes in.
+ * @param {!Node} parent The node to append nodes to.
+ * @param {!Arguments} args The values to add. See {@code goog.dom.append}.
+ * @param {number} startIndex The index of the array to start from.
+ * @private
+ */
+goog.dom.append_ = function(doc, parent, args, startIndex) {
+ function childHandler(child) {
+ // TODO(user): More coercion, ala MochiKit?
+ if (child) {
+ parent.appendChild(
+ goog.isString(child) ? doc.createTextNode(child) : child);
+ }
+ }
+
+ for (var i = startIndex; i < args.length; i++) {
+ var arg = args[i];
+ // TODO(attila): Fix isArrayLike to return false for a text node.
+ if (goog.isArrayLike(arg) && !goog.dom.isNodeLike(arg)) {
+ // If the argument is a node list, not a real array, use a clone,
+ // because forEach can't be used to mutate a NodeList.
+ goog.array.forEach(
+ goog.dom.isNodeList(arg) ? goog.array.toArray(arg) : arg,
+ childHandler);
+ } else {
+ childHandler(arg);
+ }
+ }
+};
+
+
+/**
+ * Alias for {@code createDom}.
+ * @param {string} tagName Tag to create.
+ * @param {(string|Object)=} opt_attributes If object, then a map of name-value
+ * pairs for attributes. If a string, then this is the className of the new
+ * element.
+ * @param {...(Object|string|Array|NodeList)} var_args Further DOM nodes or
+ * strings for text nodes. If one of the var_args is an array, its
+ * children will be added as childNodes instead.
+ * @return {!Element} Reference to a DOM node.
+ * @deprecated Use {@link goog.dom.createDom} instead.
+ */
+goog.dom.$dom = goog.dom.createDom;
+
+
+/**
+ * Creates a new element.
+ * @param {string} name Tag name.
+ * @return {!Element} The new element.
+ */
+goog.dom.createElement = function(name) {
+ return document.createElement(name);
+};
+
+
+/**
+ * Creates a new text node.
+ * @param {number|string} content Content.
+ * @return {!Text} The new text node.
+ */
+goog.dom.createTextNode = function(content) {
+ return document.createTextNode(String(content));
+};
+
+
+/**
+ * Create a table.
+ * @param {number} rows The number of rows in the table. Must be >= 1.
+ * @param {number} columns The number of columns in the table. Must be >= 1.
+ * @param {boolean=} opt_fillWithNbsp If true, fills table entries with
+ * {@code goog.string.Unicode.NBSP} characters.
+ * @return {!Element} The created table.
+ */
+goog.dom.createTable = function(rows, columns, opt_fillWithNbsp) {
+ // TODO(user): Return HTMLTableElement, also in prototype function.
+ // Callers need to be updated to e.g. not assign numbers to table.cellSpacing.
+ return goog.dom.createTable_(document, rows, columns, !!opt_fillWithNbsp);
+};
+
+
+/**
+ * Create a table.
+ * @param {!Document} doc Document object to use to create the table.
+ * @param {number} rows The number of rows in the table. Must be >= 1.
+ * @param {number} columns The number of columns in the table. Must be >= 1.
+ * @param {boolean} fillWithNbsp If true, fills table entries with
+ * {@code goog.string.Unicode.NBSP} characters.
+ * @return {!HTMLTableElement} The created table.
+ * @private
+ */
+goog.dom.createTable_ = function(doc, rows, columns, fillWithNbsp) {
+ var table = /** @type {!HTMLTableElement} */
+ (doc.createElement(goog.dom.TagName.TABLE));
+ var tbody = table.appendChild(doc.createElement(goog.dom.TagName.TBODY));
+ for (var i = 0; i < rows; i++) {
+ var tr = doc.createElement(goog.dom.TagName.TR);
+ for (var j = 0; j < columns; j++) {
+ var td = doc.createElement(goog.dom.TagName.TD);
+ // IE <= 9 will create a text node if we set text content to the empty
+ // string, so we avoid doing it unless necessary. This ensures that the
+ // same DOM tree is returned on all browsers.
+ if (fillWithNbsp) {
+ goog.dom.setTextContent(td, goog.string.Unicode.NBSP);
+ }
+ tr.appendChild(td);
+ }
+ tbody.appendChild(tr);
+ }
+ return table;
+};
+
+
+
+/**
+ * Creates a new Node from constant strings of HTML markup.
+ * @param {...!goog.string.Const} var_args The HTML strings to concatenate then
+ * convert into a node.
+ * @return {!Node}
+ */
+goog.dom.constHtmlToNode = function(var_args) {
+ var stringArray = goog.array.map(arguments, goog.string.Const.unwrap);
+ var safeHtml =
+ goog.html.uncheckedconversions
+ .safeHtmlFromStringKnownToSatisfyTypeContract(
+ goog.string.Const.from(
+ 'Constant HTML string, that gets turned into a ' +
+ 'Node later, so it will be automatically balanced.'),
+ stringArray.join(''));
+ return goog.dom.safeHtmlToNode(safeHtml);
+};
+
+
+/**
+ * Converts HTML markup into a node. This is a safe version of
+ * {@code goog.dom.htmlToDocumentFragment} which is now deleted.
+ * @param {!goog.html.SafeHtml} html The HTML markup to convert.
+ * @return {!Node} The resulting node.
+ */
+goog.dom.safeHtmlToNode = function(html) {
+ return goog.dom.safeHtmlToNode_(document, html);
+};
+
+
+/**
+ * Helper for {@code safeHtmlToNode}.
+ * @param {!Document} doc The document.
+ * @param {!goog.html.SafeHtml} html The HTML markup to convert.
+ * @return {!Node} The resulting node.
+ * @private
+ */
+goog.dom.safeHtmlToNode_ = function(doc, html) {
+ var tempDiv = doc.createElement(goog.dom.TagName.DIV);
+ if (goog.dom.BrowserFeature.INNER_HTML_NEEDS_SCOPED_ELEMENT) {
+ goog.dom.safe.setInnerHtml(
+ tempDiv, goog.html.SafeHtml.concat(goog.html.SafeHtml.BR, html));
+ tempDiv.removeChild(tempDiv.firstChild);
+ } else {
+ goog.dom.safe.setInnerHtml(tempDiv, html);
+ }
+ return goog.dom.childrenToNode_(doc, tempDiv);
+};
+
+
+/**
+ * Helper for {@code safeHtmlToNode_}.
+ * @param {!Document} doc The document.
+ * @param {!Node} tempDiv The input node.
+ * @return {!Node} The resulting node.
+ * @private
+ */
+goog.dom.childrenToNode_ = function(doc, tempDiv) {
+ if (tempDiv.childNodes.length == 1) {
+ return tempDiv.removeChild(tempDiv.firstChild);
+ } else {
+ var fragment = doc.createDocumentFragment();
+ while (tempDiv.firstChild) {
+ fragment.appendChild(tempDiv.firstChild);
+ }
+ return fragment;
+ }
+};
+
+
+/**
+ * Returns true if the browser is in "CSS1-compatible" (standards-compliant)
+ * mode, false otherwise.
+ * @return {boolean} True if in CSS1-compatible mode.
+ */
+goog.dom.isCss1CompatMode = function() {
+ return goog.dom.isCss1CompatMode_(document);
+};
+
+
+/**
+ * Returns true if the browser is in "CSS1-compatible" (standards-compliant)
+ * mode, false otherwise.
+ * @param {!Document} doc The document to check.
+ * @return {boolean} True if in CSS1-compatible mode.
+ * @private
+ */
+goog.dom.isCss1CompatMode_ = function(doc) {
+ if (goog.dom.COMPAT_MODE_KNOWN_) {
+ return goog.dom.ASSUME_STANDARDS_MODE;
+ }
+
+ return doc.compatMode == 'CSS1Compat';
+};
+
+
+/**
+ * Determines if the given node can contain children, intended to be used for
+ * HTML generation.
+ *
+ * IE natively supports node.canHaveChildren but has inconsistent behavior.
+ * Prior to IE8 the base tag allows children and in IE9 all nodes return true
+ * for canHaveChildren.
+ *
+ * In practice all non-IE browsers allow you to add children to any node, but
+ * the behavior is inconsistent:
+ *
+ * <pre>
+ * var a = document.createElement(goog.dom.TagName.BR);
+ * a.appendChild(document.createTextNode('foo'));
+ * a.appendChild(document.createTextNode('bar'));
+ * console.log(a.childNodes.length); // 2
+ * console.log(a.innerHTML); // Chrome: "", IE9: "foobar", FF3.5: "foobar"
+ * </pre>
+ *
+ * For more information, see:
+ * http://dev.w3.org/html5/markup/syntax.html#syntax-elements
+ *
+ * TODO(user): Rename shouldAllowChildren() ?
+ *
+ * @param {Node} node The node to check.
+ * @return {boolean} Whether the node can contain children.
+ */
+goog.dom.canHaveChildren = function(node) {
+ if (node.nodeType != goog.dom.NodeType.ELEMENT) {
+ return false;
+ }
+ switch (/** @type {!Element} */ (node).tagName) {
+ case goog.dom.TagName.APPLET:
+ case goog.dom.TagName.AREA:
+ case goog.dom.TagName.BASE:
+ case goog.dom.TagName.BR:
+ case goog.dom.TagName.COL:
+ case goog.dom.TagName.COMMAND:
+ case goog.dom.TagName.EMBED:
+ case goog.dom.TagName.FRAME:
+ case goog.dom.TagName.HR:
+ case goog.dom.TagName.IMG:
+ case goog.dom.TagName.INPUT:
+ case goog.dom.TagName.IFRAME:
+ case goog.dom.TagName.ISINDEX:
+ case goog.dom.TagName.KEYGEN:
+ case goog.dom.TagName.LINK:
+ case goog.dom.TagName.NOFRAMES:
+ case goog.dom.TagName.NOSCRIPT:
+ case goog.dom.TagName.META:
+ case goog.dom.TagName.OBJECT:
+ case goog.dom.TagName.PARAM:
+ case goog.dom.TagName.SCRIPT:
+ case goog.dom.TagName.SOURCE:
+ case goog.dom.TagName.STYLE:
+ case goog.dom.TagName.TRACK:
+ case goog.dom.TagName.WBR:
+ return false;
+ }
+ return true;
+};
+
+
+/**
+ * Appends a child to a node.
+ * @param {Node} parent Parent.
+ * @param {Node} child Child.
+ */
+goog.dom.appendChild = function(parent, child) {
+ parent.appendChild(child);
+};
+
+
+/**
+ * Appends a node with text or other nodes.
+ * @param {!Node} parent The node to append nodes to.
+ * @param {...goog.dom.Appendable} var_args The things to append to the node.
+ * If this is a Node it is appended as is.
+ * If this is a string then a text node is appended.
+ * If this is an array like object then fields 0 to length - 1 are appended.
+ */
+goog.dom.append = function(parent, var_args) {
+ goog.dom.append_(goog.dom.getOwnerDocument(parent), parent, arguments, 1);
+};
+
+
+/**
+ * Removes all the child nodes on a DOM node.
+ * @param {Node} node Node to remove children from.
+ */
+goog.dom.removeChildren = function(node) {
+ // Note: Iterations over live collections can be slow, this is the fastest
+ // we could find. The double parenthesis are used to prevent JsCompiler and
+ // strict warnings.
+ var child;
+ while ((child = node.firstChild)) {
+ node.removeChild(child);
+ }
+};
+
+
+/**
+ * Inserts a new node before an existing reference node (i.e. as the previous
+ * sibling). If the reference node has no parent, then does nothing.
+ * @param {Node} newNode Node to insert.
+ * @param {Node} refNode Reference node to insert before.
+ */
+goog.dom.insertSiblingBefore = function(newNode, refNode) {
+ if (refNode.parentNode) {
+ refNode.parentNode.insertBefore(newNode, refNode);
+ }
+};
+
+
+/**
+ * Inserts a new node after an existing reference node (i.e. as the next
+ * sibling). If the reference node has no parent, then does nothing.
+ * @param {Node} newNode Node to insert.
+ * @param {Node} refNode Reference node to insert after.
+ */
+goog.dom.insertSiblingAfter = function(newNode, refNode) {
+ if (refNode.parentNode) {
+ refNode.parentNode.insertBefore(newNode, refNode.nextSibling);
+ }
+};
+
+
+/**
+ * Insert a child at a given index. If index is larger than the number of child
+ * nodes that the parent currently has, the node is inserted as the last child
+ * node.
+ * @param {Element} parent The element into which to insert the child.
+ * @param {Node} child The element to insert.
+ * @param {number} index The index at which to insert the new child node. Must
+ * not be negative.
+ */
+goog.dom.insertChildAt = function(parent, child, index) {
+ // Note that if the second argument is null, insertBefore
+ // will append the child at the end of the list of children.
+ parent.insertBefore(child, parent.childNodes[index] || null);
+};
+
+
+/**
+ * Removes a node from its parent.
+ * @param {Node} node The node to remove.
+ * @return {Node} The node removed if removed; else, null.
+ */
+goog.dom.removeNode = function(node) {
+ return node && node.parentNode ? node.parentNode.removeChild(node) : null;
+};
+
+
+/**
+ * Replaces a node in the DOM tree. Will do nothing if {@code oldNode} has no
+ * parent.
+ * @param {Node} newNode Node to insert.
+ * @param {Node} oldNode Node to replace.
+ */
+goog.dom.replaceNode = function(newNode, oldNode) {
+ var parent = oldNode.parentNode;
+ if (parent) {
+ parent.replaceChild(newNode, oldNode);
+ }
+};
+
+
+/**
+ * Flattens an element. That is, removes it and replace it with its children.
+ * Does nothing if the element is not in the document.
+ * @param {Element} element The element to flatten.
+ * @return {Element|undefined} The original element, detached from the document
+ * tree, sans children; or undefined, if the element was not in the document
+ * to begin with.
+ */
+goog.dom.flattenElement = function(element) {
+ var child, parent = element.parentNode;
+ if (parent && parent.nodeType != goog.dom.NodeType.DOCUMENT_FRAGMENT) {
+ // Use IE DOM method (supported by Opera too) if available
+ if (element.removeNode) {
+ return /** @type {Element} */ (element.removeNode(false));
+ } else {
+ // Move all children of the original node up one level.
+ while ((child = element.firstChild)) {
+ parent.insertBefore(child, element);
+ }
+
+ // Detach the original element.
+ return /** @type {Element} */ (goog.dom.removeNode(element));
+ }
+ }
+};
+
+
+/**
+ * Returns an array containing just the element children of the given element.
+ * @param {Element} element The element whose element children we want.
+ * @return {!(Array<!Element>|NodeList<!Element>)} An array or array-like list
+ * of just the element children of the given element.
+ */
+goog.dom.getChildren = function(element) {
+ // We check if the children attribute is supported for child elements
+ // since IE8 misuses the attribute by also including comments.
+ if (goog.dom.BrowserFeature.CAN_USE_CHILDREN_ATTRIBUTE &&
+ element.children != undefined) {
+ return element.children;
+ }
+ // Fall back to manually filtering the element's child nodes.
+ return goog.array.filter(element.childNodes, function(node) {
+ return node.nodeType == goog.dom.NodeType.ELEMENT;
+ });
+};
+
+
+/**
+ * Returns the first child node that is an element.
+ * @param {Node} node The node to get the first child element of.
+ * @return {Element} The first child node of {@code node} that is an element.
+ */
+goog.dom.getFirstElementChild = function(node) {
+ if (goog.isDef(node.firstElementChild)) {
+ return /** @type {!Element} */ (node).firstElementChild;
+ }
+ return goog.dom.getNextElementNode_(node.firstChild, true);
+};
+
+
+/**
+ * Returns the last child node that is an element.
+ * @param {Node} node The node to get the last child element of.
+ * @return {Element} The last child node of {@code node} that is an element.
+ */
+goog.dom.getLastElementChild = function(node) {
+ if (goog.isDef(node.lastElementChild)) {
+ return /** @type {!Element} */ (node).lastElementChild;
+ }
+ return goog.dom.getNextElementNode_(node.lastChild, false);
+};
+
+
+/**
+ * Returns the first next sibling that is an element.
+ * @param {Node} node The node to get the next sibling element of.
+ * @return {Element} The next sibling of {@code node} that is an element.
+ */
+goog.dom.getNextElementSibling = function(node) {
+ if (goog.isDef(node.nextElementSibling)) {
+ return /** @type {!Element} */ (node).nextElementSibling;
+ }
+ return goog.dom.getNextElementNode_(node.nextSibling, true);
+};
+
+
+/**
+ * Returns the first previous sibling that is an element.
+ * @param {Node} node The node to get the previous sibling element of.
+ * @return {Element} The first previous sibling of {@code node} that is
+ * an element.
+ */
+goog.dom.getPreviousElementSibling = function(node) {
+ if (goog.isDef(node.previousElementSibling)) {
+ return /** @type {!Element} */ (node).previousElementSibling;
+ }
+ return goog.dom.getNextElementNode_(node.previousSibling, false);
+};
+
+
+/**
+ * Returns the first node that is an element in the specified direction,
+ * starting with {@code node}.
+ * @param {Node} node The node to get the next element from.
+ * @param {boolean} forward Whether to look forwards or backwards.
+ * @return {Element} The first element.
+ * @private
+ */
+goog.dom.getNextElementNode_ = function(node, forward) {
+ while (node && node.nodeType != goog.dom.NodeType.ELEMENT) {
+ node = forward ? node.nextSibling : node.previousSibling;
+ }
+
+ return /** @type {Element} */ (node);
+};
+
+
+/**
+ * Returns the next node in source order from the given node.
+ * @param {Node} node The node.
+ * @return {Node} The next node in the DOM tree, or null if this was the last
+ * node.
+ */
+goog.dom.getNextNode = function(node) {
+ if (!node) {
+ return null;
+ }
+
+ if (node.firstChild) {
+ return node.firstChild;
+ }
+
+ while (node && !node.nextSibling) {
+ node = node.parentNode;
+ }
+
+ return node ? node.nextSibling : null;
+};
+
+
+/**
+ * Returns the previous node in source order from the given node.
+ * @param {Node} node The node.
+ * @return {Node} The previous node in the DOM tree, or null if this was the
+ * first node.
+ */
+goog.dom.getPreviousNode = function(node) {
+ if (!node) {
+ return null;
+ }
+
+ if (!node.previousSibling) {
+ return node.parentNode;
+ }
+
+ node = node.previousSibling;
+ while (node && node.lastChild) {
+ node = node.lastChild;
+ }
+
+ return node;
+};
+
+
+/**
+ * Whether the object looks like a DOM node.
+ * @param {?} obj The object being tested for node likeness.
+ * @return {boolean} Whether the object looks like a DOM node.
+ */
+goog.dom.isNodeLike = function(obj) {
+ return goog.isObject(obj) && obj.nodeType > 0;
+};
+
+
+/**
+ * Whether the object looks like an Element.
+ * @param {?} obj The object being tested for Element likeness.
+ * @return {boolean} Whether the object looks like an Element.
+ */
+goog.dom.isElement = function(obj) {
+ return goog.isObject(obj) && obj.nodeType == goog.dom.NodeType.ELEMENT;
+};
+
+
+/**
+ * Returns true if the specified value is a Window object. This includes the
+ * global window for HTML pages, and iframe windows.
+ * @param {?} obj Variable to test.
+ * @return {boolean} Whether the variable is a window.
+ */
+goog.dom.isWindow = function(obj) {
+ return goog.isObject(obj) && obj['window'] == obj;
+};
+
+
+/**
+ * Returns an element's parent, if it's an Element.
+ * @param {Element} element The DOM element.
+ * @return {Element} The parent, or null if not an Element.
+ */
+goog.dom.getParentElement = function(element) {
+ var parent;
+ if (goog.dom.BrowserFeature.CAN_USE_PARENT_ELEMENT_PROPERTY) {
+ var isIe9 = goog.userAgent.IE && goog.userAgent.isVersionOrHigher('9') &&
+ !goog.userAgent.isVersionOrHigher('10');
+ // SVG elements in IE9 can't use the parentElement property.
+ // goog.global['SVGElement'] is not defined in IE9 quirks mode.
+ if (!(isIe9 && goog.global['SVGElement'] &&
+ element instanceof goog.global['SVGElement'])) {
+ parent = element.parentElement;
+ if (parent) {
+ return parent;
+ }
+ }
+ }
+ parent = element.parentNode;
+ return goog.dom.isElement(parent) ? /** @type {!Element} */ (parent) : null;
+};
+
+
+/**
+ * Whether a node contains another node.
+ * @param {?Node} parent The node that should contain the other node.
+ * @param {?Node} descendant The node to test presence of.
+ * @return {boolean} Whether the parent node contains the descendent node.
+ */
+goog.dom.contains = function(parent, descendant) {
+ if (!parent || !descendant) {
+ return false;
+ }
+ // We use browser specific methods for this if available since it is faster
+ // that way.
+
+ // IE DOM
+ if (parent.contains && descendant.nodeType == goog.dom.NodeType.ELEMENT) {
+ return parent == descendant || parent.contains(descendant);
+ }
+
+ // W3C DOM Level 3
+ if (typeof parent.compareDocumentPosition != 'undefined') {
+ return parent == descendant ||
+ Boolean(parent.compareDocumentPosition(descendant) & 16);
+ }
+
+ // W3C DOM Level 1
+ while (descendant && parent != descendant) {
+ descendant = descendant.parentNode;
+ }
+ return descendant == parent;
+};
+
+
+/**
+ * Compares the document order of two nodes, returning 0 if they are the same
+ * node, a negative number if node1 is before node2, and a positive number if
+ * node2 is before node1. Note that we compare the order the tags appear in the
+ * document so in the tree <b><i>text</i></b> the B node is considered to be
+ * before the I node.
+ *
+ * @param {Node} node1 The first node to compare.
+ * @param {Node} node2 The second node to compare.
+ * @return {number} 0 if the nodes are the same node, a negative number if node1
+ * is before node2, and a positive number if node2 is before node1.
+ */
+goog.dom.compareNodeOrder = function(node1, node2) {
+ // Fall out quickly for equality.
+ if (node1 == node2) {
+ return 0;
+ }
+
+ // Use compareDocumentPosition where available
+ if (node1.compareDocumentPosition) {
+ // 4 is the bitmask for FOLLOWS.
+ return node1.compareDocumentPosition(node2) & 2 ? 1 : -1;
+ }
+
+ // Special case for document nodes on IE 7 and 8.
+ if (goog.userAgent.IE && !goog.userAgent.isDocumentModeOrHigher(9)) {
+ if (node1.nodeType == goog.dom.NodeType.DOCUMENT) {
+ return -1;
+ }
+ if (node2.nodeType == goog.dom.NodeType.DOCUMENT) {
+ return 1;
+ }
+ }
+
+ // Process in IE using sourceIndex - we check to see if the first node has
+ // a source index or if its parent has one.
+ if ('sourceIndex' in node1 ||
+ (node1.parentNode && 'sourceIndex' in node1.parentNode)) {
+ var isElement1 = node1.nodeType == goog.dom.NodeType.ELEMENT;
+ var isElement2 = node2.nodeType == goog.dom.NodeType.ELEMENT;
+
+ if (isElement1 && isElement2) {
+ return node1.sourceIndex - node2.sourceIndex;
+ } else {
+ var parent1 = node1.parentNode;
+ var parent2 = node2.parentNode;
+
+ if (parent1 == parent2) {
+ return goog.dom.compareSiblingOrder_(node1, node2);
+ }
+
+ if (!isElement1 && goog.dom.contains(parent1, node2)) {
+ return -1 * goog.dom.compareParentsDescendantNodeIe_(node1, node2);
+ }
+
+
+ if (!isElement2 && goog.dom.contains(parent2, node1)) {
+ return goog.dom.compareParentsDescendantNodeIe_(node2, node1);
+ }
+
+ return (isElement1 ? node1.sourceIndex : parent1.sourceIndex) -
+ (isElement2 ? node2.sourceIndex : parent2.sourceIndex);
+ }
+ }
+
+ // For Safari, we compare ranges.
+ var doc = goog.dom.getOwnerDocument(node1);
+
+ var range1, range2;
+ range1 = doc.createRange();
+ range1.selectNode(node1);
+ range1.collapse(true);
+
+ range2 = doc.createRange();
+ range2.selectNode(node2);
+ range2.collapse(true);
+
+ return range1.compareBoundaryPoints(
+ goog.global['Range'].START_TO_END, range2);
+};
+
+
+/**
+ * Utility function to compare the position of two nodes, when
+ * {@code textNode}'s parent is an ancestor of {@code node}. If this entry
+ * condition is not met, this function will attempt to reference a null object.
+ * @param {!Node} textNode The textNode to compare.
+ * @param {Node} node The node to compare.
+ * @return {number} -1 if node is before textNode, +1 otherwise.
+ * @private
+ */
+goog.dom.compareParentsDescendantNodeIe_ = function(textNode, node) {
+ var parent = textNode.parentNode;
+ if (parent == node) {
+ // If textNode is a child of node, then node comes first.
+ return -1;
+ }
+ var sibling = node;
+ while (sibling.parentNode != parent) {
+ sibling = sibling.parentNode;
+ }
+ return goog.dom.compareSiblingOrder_(sibling, textNode);
+};
+
+
+/**
+ * Utility function to compare the position of two nodes known to be non-equal
+ * siblings.
+ * @param {Node} node1 The first node to compare.
+ * @param {!Node} node2 The second node to compare.
+ * @return {number} -1 if node1 is before node2, +1 otherwise.
+ * @private
+ */
+goog.dom.compareSiblingOrder_ = function(node1, node2) {
+ var s = node2;
+ while ((s = s.previousSibling)) {
+ if (s == node1) {
+ // We just found node1 before node2.
+ return -1;
+ }
+ }
+
+ // Since we didn't find it, node1 must be after node2.
+ return 1;
+};
+
+
+/**
+ * Find the deepest common ancestor of the given nodes.
+ * @param {...Node} var_args The nodes to find a common ancestor of.
+ * @return {Node} The common ancestor of the nodes, or null if there is none.
+ * null will only be returned if two or more of the nodes are from different
+ * documents.
+ */
+goog.dom.findCommonAncestor = function(var_args) {
+ var i, count = arguments.length;
+ if (!count) {
+ return null;
+ } else if (count == 1) {
+ return arguments[0];
+ }
+
+ var paths = [];
+ var minLength = Infinity;
+ for (i = 0; i < count; i++) {
+ // Compute the list of ancestors.
+ var ancestors = [];
+ var node = arguments[i];
+ while (node) {
+ ancestors.unshift(node);
+ node = node.parentNode;
+ }
+
+ // Save the list for comparison.
+ paths.push(ancestors);
+ minLength = Math.min(minLength, ancestors.length);
+ }
+ var output = null;
+ for (i = 0; i < minLength; i++) {
+ var first = paths[0][i];
+ for (var j = 1; j < count; j++) {
+ if (first != paths[j][i]) {
+ return output;
+ }
+ }
+ output = first;
+ }
+ return output;
+};
+
+
+/**
+ * Returns the owner document for a node.
+ * @param {Node|Window} node The node to get the document for.
+ * @return {!Document} The document owning the node.
+ */
+goog.dom.getOwnerDocument = function(node) {
+ // TODO(nnaze): Update param signature to be non-nullable.
+ goog.asserts.assert(node, 'Node cannot be null or undefined.');
+ return /** @type {!Document} */ (
+ node.nodeType == goog.dom.NodeType.DOCUMENT ? node : node.ownerDocument ||
+ node.document);
+};
+
+
+/**
+ * Cross-browser function for getting the document element of a frame or iframe.
+ * @param {Element} frame Frame element.
+ * @return {!Document} The frame content document.
+ */
+goog.dom.getFrameContentDocument = function(frame) {
+ return frame.contentDocument ||
+ /** @type {!HTMLFrameElement} */ (frame).contentWindow.document;
+};
+
+
+/**
+ * Cross-browser function for getting the window of a frame or iframe.
+ * @param {Element} frame Frame element.
+ * @return {Window} The window associated with the given frame, or null if none
+ * exists.
+ */
+goog.dom.getFrameContentWindow = function(frame) {
+ try {
+ return frame.contentWindow ||
+ (frame.contentDocument ? goog.dom.getWindow(frame.contentDocument) :
+ null);
+ } catch (e) {
+ // NOTE(user): In IE8, checking the contentWindow or contentDocument
+ // properties will throw a "Unspecified Error" exception if the iframe is
+ // not inserted in the DOM. If we get this we can be sure that no window
+ // exists, so return null.
+ }
+ return null;
+};
+
+
+/**
+ * Sets the text content of a node, with cross-browser support.
+ * @param {Node} node The node to change the text content of.
+ * @param {string|number} text The value that should replace the node's content.
+ */
+goog.dom.setTextContent = function(node, text) {
+ goog.asserts.assert(
+ node != null,
+ 'goog.dom.setTextContent expects a non-null value for node');
+
+ if ('textContent' in node) {
+ node.textContent = text;
+ } else if (node.nodeType == goog.dom.NodeType.TEXT) {
+ node.data = text;
+ } else if (
+ node.firstChild && node.firstChild.nodeType == goog.dom.NodeType.TEXT) {
+ // If the first child is a text node we just change its data and remove the
+ // rest of the children.
+ while (node.lastChild != node.firstChild) {
+ node.removeChild(node.lastChild);
+ }
+ node.firstChild.data = text;
+ } else {
+ goog.dom.removeChildren(node);
+ var doc = goog.dom.getOwnerDocument(node);
+ node.appendChild(doc.createTextNode(String(text)));
+ }
+};
+
+
+/**
+ * Gets the outerHTML of a node, which islike innerHTML, except that it
+ * actually contains the HTML of the node itself.
+ * @param {Element} element The element to get the HTML of.
+ * @return {string} The outerHTML of the given element.
+ */
+goog.dom.getOuterHtml = function(element) {
+ goog.asserts.assert(
+ element !== null,
+ 'goog.dom.getOuterHtml expects a non-null value for element');
+ // IE, Opera and WebKit all have outerHTML.
+ if ('outerHTML' in element) {
+ return element.outerHTML;
+ } else {
+ var doc = goog.dom.getOwnerDocument(element);
+ var div = doc.createElement(goog.dom.TagName.DIV);
+ div.appendChild(element.cloneNode(true));
+ return div.innerHTML;
+ }
+};
+
+
+/**
+ * Finds the first descendant node that matches the filter function, using
+ * a depth first search. This function offers the most general purpose way
+ * of finding a matching element. You may also wish to consider
+ * {@code goog.dom.query} which can express many matching criteria using
+ * CSS selector expressions. These expressions often result in a more
+ * compact representation of the desired result.
+ * @see goog.dom.query
+ *
+ * @param {Node} root The root of the tree to search.
+ * @param {function(Node) : boolean} p The filter function.
+ * @return {Node|undefined} The found node or undefined if none is found.
+ */
+goog.dom.findNode = function(root, p) {
+ var rv = [];
+ var found = goog.dom.findNodes_(root, p, rv, true);
+ return found ? rv[0] : undefined;
+};
+
+
+/**
+ * Finds all the descendant nodes that match the filter function, using a
+ * a depth first search. This function offers the most general-purpose way
+ * of finding a set of matching elements. You may also wish to consider
+ * {@code goog.dom.query} which can express many matching criteria using
+ * CSS selector expressions. These expressions often result in a more
+ * compact representation of the desired result.
+
+ * @param {Node} root The root of the tree to search.
+ * @param {function(Node) : boolean} p The filter function.
+ * @return {!Array<!Node>} The found nodes or an empty array if none are found.
+ */
+goog.dom.findNodes = function(root, p) {
+ var rv = [];
+ goog.dom.findNodes_(root, p, rv, false);
+ return rv;
+};
+
+
+/**
+ * Finds the first or all the descendant nodes that match the filter function,
+ * using a depth first search.
+ * @param {Node} root The root of the tree to search.
+ * @param {function(Node) : boolean} p The filter function.
+ * @param {!Array<!Node>} rv The found nodes are added to this array.
+ * @param {boolean} findOne If true we exit after the first found node.
+ * @return {boolean} Whether the search is complete or not. True in case findOne
+ * is true and the node is found. False otherwise.
+ * @private
+ */
+goog.dom.findNodes_ = function(root, p, rv, findOne) {
+ if (root != null) {
+ var child = root.firstChild;
+ while (child) {
+ if (p(child)) {
+ rv.push(child);
+ if (findOne) {
+ return true;
+ }
+ }
+ if (goog.dom.findNodes_(child, p, rv, findOne)) {
+ return true;
+ }
+ child = child.nextSibling;
+ }
+ }
+ return false;
+};
+
+
+/**
+ * Map of tags whose content to ignore when calculating text length.
+ * @private {!Object<string, number>}
+ * @const
+ */
+goog.dom.TAGS_TO_IGNORE_ = {
+ 'SCRIPT': 1,
+ 'STYLE': 1,
+ 'HEAD': 1,
+ 'IFRAME': 1,
+ 'OBJECT': 1
+};
+
+
+/**
+ * Map of tags which have predefined values with regard to whitespace.
+ * @private {!Object<string, string>}
+ * @const
+ */
+goog.dom.PREDEFINED_TAG_VALUES_ = {
+ 'IMG': ' ',
+ 'BR': '\n'
+};
+
+
+/**
+ * Returns true if the element has a tab index that allows it to receive
+ * keyboard focus (tabIndex >= 0), false otherwise. Note that some elements
+ * natively support keyboard focus, even if they have no tab index.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element has a tab index that allows keyboard
+ * focus.
+ */
+goog.dom.isFocusableTabIndex = function(element) {
+ return goog.dom.hasSpecifiedTabIndex_(element) &&
+ goog.dom.isTabIndexFocusable_(element);
+};
+
+
+/**
+ * Enables or disables keyboard focus support on the element via its tab index.
+ * Only elements for which {@link goog.dom.isFocusableTabIndex} returns true
+ * (or elements that natively support keyboard focus, like form elements) can
+ * receive keyboard focus. See http://go/tabindex for more info.
+ * @param {Element} element Element whose tab index is to be changed.
+ * @param {boolean} enable Whether to set or remove a tab index on the element
+ * that supports keyboard focus.
+ */
+goog.dom.setFocusableTabIndex = function(element, enable) {
+ if (enable) {
+ element.tabIndex = 0;
+ } else {
+ // Set tabIndex to -1 first, then remove it. This is a workaround for
+ // Safari (confirmed in version 4 on Windows). When removing the attribute
+ // without setting it to -1 first, the element remains keyboard focusable
+ // despite not having a tabIndex attribute anymore.
+ element.tabIndex = -1;
+ element.removeAttribute('tabIndex'); // Must be camelCase!
+ }
+};
+
+
+/**
+ * Returns true if the element can be focused, i.e. it has a tab index that
+ * allows it to receive keyboard focus (tabIndex >= 0), or it is an element
+ * that natively supports keyboard focus.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element allows keyboard focus.
+ */
+goog.dom.isFocusable = function(element) {
+ var focusable;
+ // Some elements can have unspecified tab index and still receive focus.
+ if (goog.dom.nativelySupportsFocus_(element)) {
+ // Make sure the element is not disabled ...
+ focusable = !element.disabled &&
+ // ... and if a tab index is specified, it allows focus.
+ (!goog.dom.hasSpecifiedTabIndex_(element) ||
+ goog.dom.isTabIndexFocusable_(element));
+ } else {
+ focusable = goog.dom.isFocusableTabIndex(element);
+ }
+
+ // IE requires elements to be visible in order to focus them.
+ return focusable && goog.userAgent.IE ?
+ goog.dom.hasNonZeroBoundingRect_(/** @type {!HTMLElement} */ (element)) :
+ focusable;
+};
+
+
+/**
+ * Returns true if the element has a specified tab index.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element has a specified tab index.
+ * @private
+ */
+goog.dom.hasSpecifiedTabIndex_ = function(element) {
+ // IE returns 0 for an unset tabIndex, so we must use getAttributeNode(),
+ // which returns an object with a 'specified' property if tabIndex is
+ // specified. This works on other browsers, too.
+ var attrNode = element.getAttributeNode('tabindex'); // Must be lowercase!
+ return goog.isDefAndNotNull(attrNode) && attrNode.specified;
+};
+
+
+/**
+ * Returns true if the element's tab index allows the element to be focused.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element's tab index allows focus.
+ * @private
+ */
+goog.dom.isTabIndexFocusable_ = function(element) {
+ var index = /** @type {!HTMLElement} */ (element).tabIndex;
+ // NOTE: IE9 puts tabIndex in 16-bit int, e.g. -2 is 65534.
+ return goog.isNumber(index) && index >= 0 && index < 32768;
+};
+
+
+/**
+ * Returns true if the element is focusable even when tabIndex is not set.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element natively supports focus.
+ * @private
+ */
+goog.dom.nativelySupportsFocus_ = function(element) {
+ return element.tagName == goog.dom.TagName.A ||
+ element.tagName == goog.dom.TagName.INPUT ||
+ element.tagName == goog.dom.TagName.TEXTAREA ||
+ element.tagName == goog.dom.TagName.SELECT ||
+ element.tagName == goog.dom.TagName.BUTTON;
+};
+
+
+/**
+ * Returns true if the element has a bounding rectangle that would be visible
+ * (i.e. its width and height are greater than zero).
+ * @param {!HTMLElement} element Element to check.
+ * @return {boolean} Whether the element has a non-zero bounding rectangle.
+ * @private
+ */
+goog.dom.hasNonZeroBoundingRect_ = function(element) {
+ var rect;
+ if (!goog.isFunction(element['getBoundingClientRect']) ||
+ // In IE, getBoundingClientRect throws on detached nodes.
+ (goog.userAgent.IE && element.parentElement == null)) {
+ rect = {'height': element.offsetHeight, 'width': element.offsetWidth};
+ } else {
+ rect = element.getBoundingClientRect();
+ }
+ return goog.isDefAndNotNull(rect) && rect.height > 0 && rect.width > 0;
+};
+
+
+/**
+ * Returns the text content of the current node, without markup and invisible
+ * symbols. New lines are stripped and whitespace is collapsed,
+ * such that each character would be visible.
+ *
+ * In browsers that support it, innerText is used. Other browsers attempt to
+ * simulate it via node traversal. Line breaks are canonicalized in IE.
+ *
+ * @param {Node} node The node from which we are getting content.
+ * @return {string} The text content.
+ */
+goog.dom.getTextContent = function(node) {
+ var textContent;
+ // Note(arv): IE9, Opera, and Safari 3 support innerText but they include
+ // text nodes in script tags. So we revert to use a user agent test here.
+ if (goog.dom.BrowserFeature.CAN_USE_INNER_TEXT && node !== null &&
+ ('innerText' in node)) {
+ textContent = goog.string.canonicalizeNewlines(node.innerText);
+ // Unfortunately .innerText() returns text with &shy; symbols
+ // We need to filter it out and then remove duplicate whitespaces
+ } else {
+ var buf = [];
+ goog.dom.getTextContent_(node, buf, true);
+ textContent = buf.join('');
+ }
+
+ // Strip &shy; entities. goog.format.insertWordBreaks inserts them in Opera.
+ textContent = textContent.replace(/ \xAD /g, ' ').replace(/\xAD/g, '');
+ // Strip &#8203; entities. goog.format.insertWordBreaks inserts them in IE8.
+ textContent = textContent.replace(/\u200B/g, '');
+
+ // Skip this replacement on old browsers with working innerText, which
+ // automatically turns &nbsp; into ' ' and / +/ into ' ' when reading
+ // innerText.
+ if (!goog.dom.BrowserFeature.CAN_USE_INNER_TEXT) {
+ textContent = textContent.replace(/ +/g, ' ');
+ }
+ if (textContent != ' ') {
+ textContent = textContent.replace(/^\s*/, '');
+ }
+
+ return textContent;
+};
+
+
+/**
+ * Returns the text content of the current node, without markup.
+ *
+ * Unlike {@code getTextContent} this method does not collapse whitespaces
+ * or normalize lines breaks.
+ *
+ * @param {Node} node The node from which we are getting content.
+ * @return {string} The raw text content.
+ */
+goog.dom.getRawTextContent = function(node) {
+ var buf = [];
+ goog.dom.getTextContent_(node, buf, false);
+
+ return buf.join('');
+};
+
+
+/**
+ * Recursive support function for text content retrieval.
+ *
+ * @param {Node} node The node from which we are getting content.
+ * @param {Array<string>} buf string buffer.
+ * @param {boolean} normalizeWhitespace Whether to normalize whitespace.
+ * @private
+ */
+goog.dom.getTextContent_ = function(node, buf, normalizeWhitespace) {
+ if (node.nodeName in goog.dom.TAGS_TO_IGNORE_) {
+ // ignore certain tags
+ } else if (node.nodeType == goog.dom.NodeType.TEXT) {
+ if (normalizeWhitespace) {
+ buf.push(String(node.nodeValue).replace(/(\r\n|\r|\n)/g, ''));
+ } else {
+ buf.push(node.nodeValue);
+ }
+ } else if (node.nodeName in goog.dom.PREDEFINED_TAG_VALUES_) {
+ buf.push(goog.dom.PREDEFINED_TAG_VALUES_[node.nodeName]);
+ } else {
+ var child = node.firstChild;
+ while (child) {
+ goog.dom.getTextContent_(child, buf, normalizeWhitespace);
+ child = child.nextSibling;
+ }
+ }
+};
+
+
+/**
+ * Returns the text length of the text contained in a node, without markup. This
+ * is equivalent to the selection length if the node was selected, or the number
+ * of cursor movements to traverse the node. Images & BRs take one space. New
+ * lines are ignored.
+ *
+ * @param {Node} node The node whose text content length is being calculated.
+ * @return {number} The length of {@code node}'s text content.
+ */
+goog.dom.getNodeTextLength = function(node) {
+ return goog.dom.getTextContent(node).length;
+};
+
+
+/**
+ * Returns the text offset of a node relative to one of its ancestors. The text
+ * length is the same as the length calculated by goog.dom.getNodeTextLength.
+ *
+ * @param {Node} node The node whose offset is being calculated.
+ * @param {Node=} opt_offsetParent The node relative to which the offset will
+ * be calculated. Defaults to the node's owner document's body.
+ * @return {number} The text offset.
+ */
+goog.dom.getNodeTextOffset = function(node, opt_offsetParent) {
+ var root = opt_offsetParent || goog.dom.getOwnerDocument(node).body;
+ var buf = [];
+ while (node && node != root) {
+ var cur = node;
+ while ((cur = cur.previousSibling)) {
+ buf.unshift(goog.dom.getTextContent(cur));
+ }
+ node = node.parentNode;
+ }
+ // Trim left to deal with FF cases when there might be line breaks and empty
+ // nodes at the front of the text
+ return goog.string.trimLeft(buf.join('')).replace(/ +/g, ' ').length;
+};
+
+
+/**
+ * Returns the node at a given offset in a parent node. If an object is
+ * provided for the optional third parameter, the node and the remainder of the
+ * offset will stored as properties of this object.
+ * @param {Node} parent The parent node.
+ * @param {number} offset The offset into the parent node.
+ * @param {Object=} opt_result Object to be used to store the return value. The
+ * return value will be stored in the form {node: Node, remainder: number}
+ * if this object is provided.
+ * @return {Node} The node at the given offset.
+ */
+goog.dom.getNodeAtOffset = function(parent, offset, opt_result) {
+ var stack = [parent], pos = 0, cur = null;
+ while (stack.length > 0 && pos < offset) {
+ cur = stack.pop();
+ if (cur.nodeName in goog.dom.TAGS_TO_IGNORE_) {
+ // ignore certain tags
+ } else if (cur.nodeType == goog.dom.NodeType.TEXT) {
+ var text = cur.nodeValue.replace(/(\r\n|\r|\n)/g, '').replace(/ +/g, ' ');
+ pos += text.length;
+ } else if (cur.nodeName in goog.dom.PREDEFINED_TAG_VALUES_) {
+ pos += goog.dom.PREDEFINED_TAG_VALUES_[cur.nodeName].length;
+ } else {
+ for (var i = cur.childNodes.length - 1; i >= 0; i--) {
+ stack.push(cur.childNodes[i]);
+ }
+ }
+ }
+ if (goog.isObject(opt_result)) {
+ opt_result.remainder = cur ? cur.nodeValue.length + offset - pos - 1 : 0;
+ opt_result.node = cur;
+ }
+
+ return cur;
+};
+
+
+/**
+ * Returns true if the object is a {@code NodeList}. To qualify as a NodeList,
+ * the object must have a numeric length property and an item function (which
+ * has type 'string' on IE for some reason).
+ * @param {Object} val Object to test.
+ * @return {boolean} Whether the object is a NodeList.
+ */
+goog.dom.isNodeList = function(val) {
+ // TODO(attila): Now the isNodeList is part of goog.dom we can use
+ // goog.userAgent to make this simpler.
+ // A NodeList must have a length property of type 'number' on all platforms.
+ if (val && typeof val.length == 'number') {
+ // A NodeList is an object everywhere except Safari, where it's a function.
+ if (goog.isObject(val)) {
+ // A NodeList must have an item function (on non-IE platforms) or an item
+ // property of type 'string' (on IE).
+ return typeof val.item == 'function' || typeof val.item == 'string';
+ } else if (goog.isFunction(val)) {
+ // On Safari, a NodeList is a function with an item property that is also
+ // a function.
+ return typeof val.item == 'function';
+ }
+ }
+
+ // Not a NodeList.
+ return false;
+};
+
+
+/**
+ * Walks up the DOM hierarchy returning the first ancestor that has the passed
+ * tag name and/or class name. If the passed element matches the specified
+ * criteria, the element itself is returned.
+ * @param {Node} element The DOM node to start with.
+ * @param {?(goog.dom.TagName|string)=} opt_tag The tag name to match (or
+ * null/undefined to match only based on class name).
+ * @param {?string=} opt_class The class name to match (or null/undefined to
+ * match only based on tag name).
+ * @param {number=} opt_maxSearchSteps Maximum number of levels to search up the
+ * dom.
+ * @return {Element} The first ancestor that matches the passed criteria, or
+ * null if no match is found.
+ */
+goog.dom.getAncestorByTagNameAndClass = function(
+ element, opt_tag, opt_class, opt_maxSearchSteps) {
+ if (!opt_tag && !opt_class) {
+ return null;
+ }
+ var tagName = opt_tag ? opt_tag.toUpperCase() : null;
+ return /** @type {Element} */ (goog.dom.getAncestor(element, function(node) {
+ return (!tagName || node.nodeName == tagName) &&
+ (!opt_class ||
+ goog.isString(node.className) &&
+ goog.array.contains(node.className.split(/\s+/), opt_class));
+ }, true, opt_maxSearchSteps));
+};
+
+
+/**
+ * Walks up the DOM hierarchy returning the first ancestor that has the passed
+ * class name. If the passed element matches the specified criteria, the
+ * element itself is returned.
+ * @param {Node} element The DOM node to start with.
+ * @param {string} className The class name to match.
+ * @param {number=} opt_maxSearchSteps Maximum number of levels to search up the
+ * dom.
+ * @return {Element} The first ancestor that matches the passed criteria, or
+ * null if none match.
+ */
+goog.dom.getAncestorByClass = function(element, className, opt_maxSearchSteps) {
+ return goog.dom.getAncestorByTagNameAndClass(
+ element, null, className, opt_maxSearchSteps);
+};
+
+
+/**
+ * Walks up the DOM hierarchy returning the first ancestor that passes the
+ * matcher function.
+ * @param {Node} element The DOM node to start with.
+ * @param {function(Node) : boolean} matcher A function that returns true if the
+ * passed node matches the desired criteria.
+ * @param {boolean=} opt_includeNode If true, the node itself is included in
+ * the search (the first call to the matcher will pass startElement as
+ * the node to test).
+ * @param {number=} opt_maxSearchSteps Maximum number of levels to search up the
+ * dom.
+ * @return {Node} DOM node that matched the matcher, or null if there was
+ * no match.
+ */
+goog.dom.getAncestor = function(
+ element, matcher, opt_includeNode, opt_maxSearchSteps) {
+ if (!opt_includeNode) {
+ element = element.parentNode;
+ }
+ var steps = 0;
+ while (element &&
+ (opt_maxSearchSteps == null || steps <= opt_maxSearchSteps)) {
+ goog.asserts.assert(element.name != 'parentNode');
+ if (matcher(element)) {
+ return element;
+ }
+ element = element.parentNode;
+ steps++;
+ }
+ // Reached the root of the DOM without a match
+ return null;
+};
+
+
+/**
+ * Determines the active element in the given document.
+ * @param {Document} doc The document to look in.
+ * @return {Element} The active element.
+ */
+goog.dom.getActiveElement = function(doc) {
+ try {
+ return doc && doc.activeElement;
+ } catch (e) {
+ // NOTE(nicksantos): Sometimes, evaluating document.activeElement in IE
+ // throws an exception. I'm not 100% sure why, but I suspect it chokes
+ // on document.activeElement if the activeElement has been recently
+ // removed from the DOM by a JS operation.
+ //
+ // We assume that an exception here simply means
+ // "there is no active element."
+ }
+
+ return null;
+};
+
+
+/**
+ * Gives the current devicePixelRatio.
+ *
+ * By default, this is the value of window.devicePixelRatio (which should be
+ * preferred if present).
+ *
+ * If window.devicePixelRatio is not present, the ratio is calculated with
+ * window.matchMedia, if present. Otherwise, gives 1.0.
+ *
+ * Some browsers (including Chrome) consider the browser zoom level in the pixel
+ * ratio, so the value may change across multiple calls.
+ *
+ * @return {number} The number of actual pixels per virtual pixel.
+ */
+goog.dom.getPixelRatio = function() {
+ var win = goog.dom.getWindow();
+ if (goog.isDef(win.devicePixelRatio)) {
+ return win.devicePixelRatio;
+ } else if (win.matchMedia) {
+ return goog.dom.matchesPixelRatio_(.75) ||
+ goog.dom.matchesPixelRatio_(1.5) || goog.dom.matchesPixelRatio_(2) ||
+ goog.dom.matchesPixelRatio_(3) || 1;
+ }
+ return 1;
+};
+
+
+/**
+ * Calculates a mediaQuery to check if the current device supports the
+ * given actual to virtual pixel ratio.
+ * @param {number} pixelRatio The ratio of actual pixels to virtual pixels.
+ * @return {number} pixelRatio if applicable, otherwise 0.
+ * @private
+ */
+goog.dom.matchesPixelRatio_ = function(pixelRatio) {
+ var win = goog.dom.getWindow();
+ var query =
+ ('(-webkit-min-device-pixel-ratio: ' + pixelRatio + '),' +
+ '(min--moz-device-pixel-ratio: ' + pixelRatio + '),' +
+ '(min-resolution: ' + pixelRatio + 'dppx)');
+ return win.matchMedia(query).matches ? pixelRatio : 0;
+};
+
+
+
+/**
+ * Create an instance of a DOM helper with a new document object.
+ * @param {Document=} opt_document Document object to associate with this
+ * DOM helper.
+ * @constructor
+ */
+goog.dom.DomHelper = function(opt_document) {
+ /**
+ * Reference to the document object to use
+ * @type {!Document}
+ * @private
+ */
+ this.document_ = opt_document || goog.global.document || document;
+};
+
+
+/**
+ * Gets the dom helper object for the document where the element resides.
+ * @param {Node=} opt_node If present, gets the DomHelper for this node.
+ * @return {!goog.dom.DomHelper} The DomHelper.
+ */
+goog.dom.DomHelper.prototype.getDomHelper = goog.dom.getDomHelper;
+
+
+/**
+ * Sets the document object.
+ * @param {!Document} document Document object.
+ */
+goog.dom.DomHelper.prototype.setDocument = function(document) {
+ this.document_ = document;
+};
+
+
+/**
+ * Gets the document object being used by the dom library.
+ * @return {!Document} Document object.
+ */
+goog.dom.DomHelper.prototype.getDocument = function() {
+ return this.document_;
+};
+
+
+/**
+ * Alias for {@code getElementById}. If a DOM node is passed in then we just
+ * return that.
+ * @param {string|Element} element Element ID or a DOM node.
+ * @return {Element} The element with the given ID, or the node passed in.
+ */
+goog.dom.DomHelper.prototype.getElement = function(element) {
+ return goog.dom.getElementHelper_(this.document_, element);
+};
+
+
+/**
+ * Gets an element by id, asserting that the element is found.
+ *
+ * This is used when an element is expected to exist, and should fail with
+ * an assertion error if it does not (if assertions are enabled).
+ *
+ * @param {string} id Element ID.
+ * @return {!Element} The element with the given ID, if it exists.
+ */
+goog.dom.DomHelper.prototype.getRequiredElement = function(id) {
+ return goog.dom.getRequiredElementHelper_(this.document_, id);
+};
+
+
+/**
+ * Alias for {@code getElement}.
+ * @param {string|Element} element Element ID or a DOM node.
+ * @return {Element} The element with the given ID, or the node passed in.
+ * @deprecated Use {@link goog.dom.DomHelper.prototype.getElement} instead.
+ */
+goog.dom.DomHelper.prototype.$ = goog.dom.DomHelper.prototype.getElement;
+
+
+/**
+ * Looks up elements by both tag and class name, using browser native functions
+ * ({@code querySelectorAll}, {@code getElementsByTagName} or
+ * {@code getElementsByClassName}) where possible. The returned array is a live
+ * NodeList or a static list depending on the code path taken.
+ *
+ * @see goog.dom.query
+ *
+ * @param {?string=} opt_tag Element tag name or * for all tags.
+ * @param {?string=} opt_class Optional class name.
+ * @param {(Document|Element)=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} Array-like list of elements (only a length
+ * property and numerical indices are guaranteed to exist).
+ */
+goog.dom.DomHelper.prototype.getElementsByTagNameAndClass = function(
+ opt_tag, opt_class, opt_el) {
+ return goog.dom.getElementsByTagNameAndClass_(
+ this.document_, opt_tag, opt_class, opt_el);
+};
+
+
+/**
+ * Returns an array of all the elements with the provided className.
+ * @see {goog.dom.query}
+ * @param {string} className the name of the class to look for.
+ * @param {Element|Document=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} The items found with the class name provided.
+ */
+goog.dom.DomHelper.prototype.getElementsByClass = function(className, opt_el) {
+ var doc = opt_el || this.document_;
+ return goog.dom.getElementsByClass(className, doc);
+};
+
+
+/**
+ * Returns the first element we find matching the provided class name.
+ * @see {goog.dom.query}
+ * @param {string} className the name of the class to look for.
+ * @param {(Element|Document)=} opt_el Optional element to look in.
+ * @return {Element} The first item found with the class name provided.
+ */
+goog.dom.DomHelper.prototype.getElementByClass = function(className, opt_el) {
+ var doc = opt_el || this.document_;
+ return goog.dom.getElementByClass(className, doc);
+};
+
+
+/**
+ * Ensures an element with the given className exists, and then returns the
+ * first element with the provided className.
+ * @see {goog.dom.query}
+ * @param {string} className the name of the class to look for.
+ * @param {(!Element|!Document)=} opt_root Optional element or document to look
+ * in.
+ * @return {!Element} The first item found with the class name provided.
+ * @throws {goog.asserts.AssertionError} Thrown if no element is found.
+ */
+goog.dom.DomHelper.prototype.getRequiredElementByClass = function(
+ className, opt_root) {
+ var root = opt_root || this.document_;
+ return goog.dom.getRequiredElementByClass(className, root);
+};
+
+
+/**
+ * Alias for {@code getElementsByTagNameAndClass}.
+ * @deprecated Use DomHelper getElementsByTagNameAndClass.
+ * @see goog.dom.query
+ *
+ * @param {?string=} opt_tag Element tag name.
+ * @param {?string=} opt_class Optional class name.
+ * @param {Element=} opt_el Optional element to look in.
+ * @return {!IArrayLike<!Element>} Array-like list of elements (only a length
+ * property and numerical indices are guaranteed to exist).
+ */
+goog.dom.DomHelper.prototype.$$ =
+ goog.dom.DomHelper.prototype.getElementsByTagNameAndClass;
+
+
+/**
+ * Sets a number of properties on a node.
+ * @param {Element} element DOM node to set properties on.
+ * @param {Object} properties Hash of property:value pairs.
+ */
+goog.dom.DomHelper.prototype.setProperties = goog.dom.setProperties;
+
+
+/**
+ * Gets the dimensions of the viewport.
+ * @param {Window=} opt_window Optional window element to test. Defaults to
+ * the window of the Dom Helper.
+ * @return {!goog.math.Size} Object with values 'width' and 'height'.
+ */
+goog.dom.DomHelper.prototype.getViewportSize = function(opt_window) {
+ // TODO(arv): This should not take an argument. That breaks the rule of a
+ // a DomHelper representing a single frame/window/document.
+ return goog.dom.getViewportSize(opt_window || this.getWindow());
+};
+
+
+/**
+ * Calculates the height of the document.
+ *
+ * @return {number} The height of the document.
+ */
+goog.dom.DomHelper.prototype.getDocumentHeight = function() {
+ return goog.dom.getDocumentHeight_(this.getWindow());
+};
+
+
+/**
+ * Typedef for use with goog.dom.createDom and goog.dom.append.
+ * @typedef {Object|string|Array|NodeList}
+ */
+goog.dom.Appendable;
+
+
+/**
+ * Returns a dom node with a set of attributes. This function accepts varargs
+ * for subsequent nodes to be added. Subsequent nodes will be added to the
+ * first node as childNodes.
+ *
+ * So:
+ * <code>createDom('div', null, createDom('p'), createDom('p'));</code>
+ * would return a div with two child paragraphs
+ *
+ * An easy way to move all child nodes of an existing element to a new parent
+ * element is:
+ * <code>createDom('div', null, oldElement.childNodes);</code>
+ * which will remove all child nodes from the old element and add them as
+ * child nodes of the new DIV.
+ *
+ * @param {string} tagName Tag to create.
+ * @param {Object|string=} opt_attributes If object, then a map of name-value
+ * pairs for attributes. If a string, then this is the className of the new
+ * element.
+ * @param {...goog.dom.Appendable} var_args Further DOM nodes or
+ * strings for text nodes. If one of the var_args is an array or
+ * NodeList, its elements will be added as childNodes instead.
+ * @return {!Element} Reference to a DOM node.
+ */
+goog.dom.DomHelper.prototype.createDom = function(
+ tagName, opt_attributes, var_args) {
+ return goog.dom.createDom_(this.document_, arguments);
+};
+
+
+/**
+ * Alias for {@code createDom}.
+ * @param {string} tagName Tag to create.
+ * @param {(Object|string)=} opt_attributes If object, then a map of name-value
+ * pairs for attributes. If a string, then this is the className of the new
+ * element.
+ * @param {...goog.dom.Appendable} var_args Further DOM nodes or strings for
+ * text nodes. If one of the var_args is an array, its children will be
+ * added as childNodes instead.
+ * @return {!Element} Reference to a DOM node.
+ * @deprecated Use {@link goog.dom.DomHelper.prototype.createDom} instead.
+ */
+goog.dom.DomHelper.prototype.$dom = goog.dom.DomHelper.prototype.createDom;
+
+
+/**
+ * Creates a new element.
+ * @param {string} name Tag name.
+ * @return {!Element} The new element.
+ */
+goog.dom.DomHelper.prototype.createElement = function(name) {
+ return this.document_.createElement(name);
+};
+
+
+/**
+ * Creates a new text node.
+ * @param {number|string} content Content.
+ * @return {!Text} The new text node.
+ */
+goog.dom.DomHelper.prototype.createTextNode = function(content) {
+ return this.document_.createTextNode(String(content));
+};
+
+
+/**
+ * Create a table.
+ * @param {number} rows The number of rows in the table. Must be >= 1.
+ * @param {number} columns The number of columns in the table. Must be >= 1.
+ * @param {boolean=} opt_fillWithNbsp If true, fills table entries with
+ * {@code goog.string.Unicode.NBSP} characters.
+ * @return {!HTMLElement} The created table.
+ */
+goog.dom.DomHelper.prototype.createTable = function(
+ rows, columns, opt_fillWithNbsp) {
+ return goog.dom.createTable_(
+ this.document_, rows, columns, !!opt_fillWithNbsp);
+};
+
+
+/**
+ * Converts an HTML into a node or a document fragment. A single Node is used if
+ * {@code html} only generates a single node. If {@code html} generates multiple
+ * nodes then these are put inside a {@code DocumentFragment}. This is a safe
+ * version of {@code goog.dom.DomHelper#htmlToDocumentFragment} which is now
+ * deleted.
+ * @param {!goog.html.SafeHtml} html The HTML markup to convert.
+ * @return {!Node} The resulting node.
+ */
+goog.dom.DomHelper.prototype.safeHtmlToNode = function(html) {
+ return goog.dom.safeHtmlToNode_(this.document_, html);
+};
+
+
+/**
+ * Returns true if the browser is in "CSS1-compatible" (standards-compliant)
+ * mode, false otherwise.
+ * @return {boolean} True if in CSS1-compatible mode.
+ */
+goog.dom.DomHelper.prototype.isCss1CompatMode = function() {
+ return goog.dom.isCss1CompatMode_(this.document_);
+};
+
+
+/**
+ * Gets the window object associated with the document.
+ * @return {!Window} The window associated with the given document.
+ */
+goog.dom.DomHelper.prototype.getWindow = function() {
+ return goog.dom.getWindow_(this.document_);
+};
+
+
+/**
+ * Gets the document scroll element.
+ * @return {!Element} Scrolling element.
+ */
+goog.dom.DomHelper.prototype.getDocumentScrollElement = function() {
+ return goog.dom.getDocumentScrollElement_(this.document_);
+};
+
+
+/**
+ * Gets the document scroll distance as a coordinate object.
+ * @return {!goog.math.Coordinate} Object with properties 'x' and 'y'.
+ */
+goog.dom.DomHelper.prototype.getDocumentScroll = function() {
+ return goog.dom.getDocumentScroll_(this.document_);
+};
+
+
+/**
+ * Determines the active element in the given document.
+ * @param {Document=} opt_doc The document to look in.
+ * @return {Element} The active element.
+ */
+goog.dom.DomHelper.prototype.getActiveElement = function(opt_doc) {
+ return goog.dom.getActiveElement(opt_doc || this.document_);
+};
+
+
+/**
+ * Appends a child to a node.
+ * @param {Node} parent Parent.
+ * @param {Node} child Child.
+ */
+goog.dom.DomHelper.prototype.appendChild = goog.dom.appendChild;
+
+
+/**
+ * Appends a node with text or other nodes.
+ * @param {!Node} parent The node to append nodes to.
+ * @param {...goog.dom.Appendable} var_args The things to append to the node.
+ * If this is a Node it is appended as is.
+ * If this is a string then a text node is appended.
+ * If this is an array like object then fields 0 to length - 1 are appended.
+ */
+goog.dom.DomHelper.prototype.append = goog.dom.append;
+
+
+/**
+ * Determines if the given node can contain children, intended to be used for
+ * HTML generation.
+ *
+ * @param {Node} node The node to check.
+ * @return {boolean} Whether the node can contain children.
+ */
+goog.dom.DomHelper.prototype.canHaveChildren = goog.dom.canHaveChildren;
+
+
+/**
+ * Removes all the child nodes on a DOM node.
+ * @param {Node} node Node to remove children from.
+ */
+goog.dom.DomHelper.prototype.removeChildren = goog.dom.removeChildren;
+
+
+/**
+ * Inserts a new node before an existing reference node (i.e., as the previous
+ * sibling). If the reference node has no parent, then does nothing.
+ * @param {Node} newNode Node to insert.
+ * @param {Node} refNode Reference node to insert before.
+ */
+goog.dom.DomHelper.prototype.insertSiblingBefore = goog.dom.insertSiblingBefore;
+
+
+/**
+ * Inserts a new node after an existing reference node (i.e., as the next
+ * sibling). If the reference node has no parent, then does nothing.
+ * @param {Node} newNode Node to insert.
+ * @param {Node} refNode Reference node to insert after.
+ */
+goog.dom.DomHelper.prototype.insertSiblingAfter = goog.dom.insertSiblingAfter;
+
+
+/**
+ * Insert a child at a given index. If index is larger than the number of child
+ * nodes that the parent currently has, the node is inserted as the last child
+ * node.
+ * @param {Element} parent The element into which to insert the child.
+ * @param {Node} child The element to insert.
+ * @param {number} index The index at which to insert the new child node. Must
+ * not be negative.
+ */
+goog.dom.DomHelper.prototype.insertChildAt = goog.dom.insertChildAt;
+
+
+/**
+ * Removes a node from its parent.
+ * @param {Node} node The node to remove.
+ * @return {Node} The node removed if removed; else, null.
+ */
+goog.dom.DomHelper.prototype.removeNode = goog.dom.removeNode;
+
+
+/**
+ * Replaces a node in the DOM tree. Will do nothing if {@code oldNode} has no
+ * parent.
+ * @param {Node} newNode Node to insert.
+ * @param {Node} oldNode Node to replace.
+ */
+goog.dom.DomHelper.prototype.replaceNode = goog.dom.replaceNode;
+
+
+/**
+ * Flattens an element. That is, removes it and replace it with its children.
+ * @param {Element} element The element to flatten.
+ * @return {Element|undefined} The original element, detached from the document
+ * tree, sans children, or undefined if the element was already not in the
+ * document.
+ */
+goog.dom.DomHelper.prototype.flattenElement = goog.dom.flattenElement;
+
+
+/**
+ * Returns an array containing just the element children of the given element.
+ * @param {Element} element The element whose element children we want.
+ * @return {!(Array<!Element>|NodeList<!Element>)} An array or array-like list
+ * of just the element children of the given element.
+ */
+goog.dom.DomHelper.prototype.getChildren = goog.dom.getChildren;
+
+
+/**
+ * Returns the first child node that is an element.
+ * @param {Node} node The node to get the first child element of.
+ * @return {Element} The first child node of {@code node} that is an element.
+ */
+goog.dom.DomHelper.prototype.getFirstElementChild =
+ goog.dom.getFirstElementChild;
+
+
+/**
+ * Returns the last child node that is an element.
+ * @param {Node} node The node to get the last child element of.
+ * @return {Element} The last child node of {@code node} that is an element.
+ */
+goog.dom.DomHelper.prototype.getLastElementChild = goog.dom.getLastElementChild;
+
+
+/**
+ * Returns the first next sibling that is an element.
+ * @param {Node} node The node to get the next sibling element of.
+ * @return {Element} The next sibling of {@code node} that is an element.
+ */
+goog.dom.DomHelper.prototype.getNextElementSibling =
+ goog.dom.getNextElementSibling;
+
+
+/**
+ * Returns the first previous sibling that is an element.
+ * @param {Node} node The node to get the previous sibling element of.
+ * @return {Element} The first previous sibling of {@code node} that is
+ * an element.
+ */
+goog.dom.DomHelper.prototype.getPreviousElementSibling =
+ goog.dom.getPreviousElementSibling;
+
+
+/**
+ * Returns the next node in source order from the given node.
+ * @param {Node} node The node.
+ * @return {Node} The next node in the DOM tree, or null if this was the last
+ * node.
+ */
+goog.dom.DomHelper.prototype.getNextNode = goog.dom.getNextNode;
+
+
+/**
+ * Returns the previous node in source order from the given node.
+ * @param {Node} node The node.
+ * @return {Node} The previous node in the DOM tree, or null if this was the
+ * first node.
+ */
+goog.dom.DomHelper.prototype.getPreviousNode = goog.dom.getPreviousNode;
+
+
+/**
+ * Whether the object looks like a DOM node.
+ * @param {?} obj The object being tested for node likeness.
+ * @return {boolean} Whether the object looks like a DOM node.
+ */
+goog.dom.DomHelper.prototype.isNodeLike = goog.dom.isNodeLike;
+
+
+/**
+ * Whether the object looks like an Element.
+ * @param {?} obj The object being tested for Element likeness.
+ * @return {boolean} Whether the object looks like an Element.
+ */
+goog.dom.DomHelper.prototype.isElement = goog.dom.isElement;
+
+
+/**
+ * Returns true if the specified value is a Window object. This includes the
+ * global window for HTML pages, and iframe windows.
+ * @param {?} obj Variable to test.
+ * @return {boolean} Whether the variable is a window.
+ */
+goog.dom.DomHelper.prototype.isWindow = goog.dom.isWindow;
+
+
+/**
+ * Returns an element's parent, if it's an Element.
+ * @param {Element} element The DOM element.
+ * @return {Element} The parent, or null if not an Element.
+ */
+goog.dom.DomHelper.prototype.getParentElement = goog.dom.getParentElement;
+
+
+/**
+ * Whether a node contains another node.
+ * @param {Node} parent The node that should contain the other node.
+ * @param {Node} descendant The node to test presence of.
+ * @return {boolean} Whether the parent node contains the descendent node.
+ */
+goog.dom.DomHelper.prototype.contains = goog.dom.contains;
+
+
+/**
+ * Compares the document order of two nodes, returning 0 if they are the same
+ * node, a negative number if node1 is before node2, and a positive number if
+ * node2 is before node1. Note that we compare the order the tags appear in the
+ * document so in the tree <b><i>text</i></b> the B node is considered to be
+ * before the I node.
+ *
+ * @param {Node} node1 The first node to compare.
+ * @param {Node} node2 The second node to compare.
+ * @return {number} 0 if the nodes are the same node, a negative number if node1
+ * is before node2, and a positive number if node2 is before node1.
+ */
+goog.dom.DomHelper.prototype.compareNodeOrder = goog.dom.compareNodeOrder;
+
+
+/**
+ * Find the deepest common ancestor of the given nodes.
+ * @param {...Node} var_args The nodes to find a common ancestor of.
+ * @return {Node} The common ancestor of the nodes, or null if there is none.
+ * null will only be returned if two or more of the nodes are from different
+ * documents.
+ */
+goog.dom.DomHelper.prototype.findCommonAncestor = goog.dom.findCommonAncestor;
+
+
+/**
+ * Returns the owner document for a node.
+ * @param {Node} node The node to get the document for.
+ * @return {!Document} The document owning the node.
+ */
+goog.dom.DomHelper.prototype.getOwnerDocument = goog.dom.getOwnerDocument;
+
+
+/**
+ * Cross browser function for getting the document element of an iframe.
+ * @param {Element} iframe Iframe element.
+ * @return {!Document} The frame content document.
+ */
+goog.dom.DomHelper.prototype.getFrameContentDocument =
+ goog.dom.getFrameContentDocument;
+
+
+/**
+ * Cross browser function for getting the window of a frame or iframe.
+ * @param {Element} frame Frame element.
+ * @return {Window} The window associated with the given frame.
+ */
+goog.dom.DomHelper.prototype.getFrameContentWindow =
+ goog.dom.getFrameContentWindow;
+
+
+/**
+ * Sets the text content of a node, with cross-browser support.
+ * @param {Node} node The node to change the text content of.
+ * @param {string|number} text The value that should replace the node's content.
+ */
+goog.dom.DomHelper.prototype.setTextContent = goog.dom.setTextContent;
+
+
+/**
+ * Gets the outerHTML of a node, which islike innerHTML, except that it
+ * actually contains the HTML of the node itself.
+ * @param {Element} element The element to get the HTML of.
+ * @return {string} The outerHTML of the given element.
+ */
+goog.dom.DomHelper.prototype.getOuterHtml = goog.dom.getOuterHtml;
+
+
+/**
+ * Finds the first descendant node that matches the filter function. This does
+ * a depth first search.
+ * @param {Node} root The root of the tree to search.
+ * @param {function(Node) : boolean} p The filter function.
+ * @return {Node|undefined} The found node or undefined if none is found.
+ */
+goog.dom.DomHelper.prototype.findNode = goog.dom.findNode;
+
+
+/**
+ * Finds all the descendant nodes that matches the filter function. This does a
+ * depth first search.
+ * @param {Node} root The root of the tree to search.
+ * @param {function(Node) : boolean} p The filter function.
+ * @return {Array<Node>} The found nodes or an empty array if none are found.
+ */
+goog.dom.DomHelper.prototype.findNodes = goog.dom.findNodes;
+
+
+/**
+ * Returns true if the element has a tab index that allows it to receive
+ * keyboard focus (tabIndex >= 0), false otherwise. Note that some elements
+ * natively support keyboard focus, even if they have no tab index.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element has a tab index that allows keyboard
+ * focus.
+ */
+goog.dom.DomHelper.prototype.isFocusableTabIndex = goog.dom.isFocusableTabIndex;
+
+
+/**
+ * Enables or disables keyboard focus support on the element via its tab index.
+ * Only elements for which {@link goog.dom.isFocusableTabIndex} returns true
+ * (or elements that natively support keyboard focus, like form elements) can
+ * receive keyboard focus. See http://go/tabindex for more info.
+ * @param {Element} element Element whose tab index is to be changed.
+ * @param {boolean} enable Whether to set or remove a tab index on the element
+ * that supports keyboard focus.
+ */
+goog.dom.DomHelper.prototype.setFocusableTabIndex =
+ goog.dom.setFocusableTabIndex;
+
+
+/**
+ * Returns true if the element can be focused, i.e. it has a tab index that
+ * allows it to receive keyboard focus (tabIndex >= 0), or it is an element
+ * that natively supports keyboard focus.
+ * @param {!Element} element Element to check.
+ * @return {boolean} Whether the element allows keyboard focus.
+ */
+goog.dom.DomHelper.prototype.isFocusable = goog.dom.isFocusable;
+
+
+/**
+ * Returns the text contents of the current node, without markup. New lines are
+ * stripped and whitespace is collapsed, such that each character would be
+ * visible.
+ *
+ * In browsers that support it, innerText is used. Other browsers attempt to
+ * simulate it via node traversal. Line breaks are canonicalized in IE.
+ *
+ * @param {Node} node The node from which we are getting content.
+ * @return {string} The text content.
+ */
+goog.dom.DomHelper.prototype.getTextContent = goog.dom.getTextContent;
+
+
+/**
+ * Returns the text length of the text contained in a node, without markup. This
+ * is equivalent to the selection length if the node was selected, or the number
+ * of cursor movements to traverse the node. Images & BRs take one space. New
+ * lines are ignored.
+ *
+ * @param {Node} node The node whose text content length is being calculated.
+ * @return {number} The length of {@code node}'s text content.
+ */
+goog.dom.DomHelper.prototype.getNodeTextLength = goog.dom.getNodeTextLength;
+
+
+/**
+ * Returns the text offset of a node relative to one of its ancestors. The text
+ * length is the same as the length calculated by
+ * {@code goog.dom.getNodeTextLength}.
+ *
+ * @param {Node} node The node whose offset is being calculated.
+ * @param {Node=} opt_offsetParent Defaults to the node's owner document's body.
+ * @return {number} The text offset.
+ */
+goog.dom.DomHelper.prototype.getNodeTextOffset = goog.dom.getNodeTextOffset;
+
+
+/**
+ * Returns the node at a given offset in a parent node. If an object is
+ * provided for the optional third parameter, the node and the remainder of the
+ * offset will stored as properties of this object.
+ * @param {Node} parent The parent node.
+ * @param {number} offset The offset into the parent node.
+ * @param {Object=} opt_result Object to be used to store the return value. The
+ * return value will be stored in the form {node: Node, remainder: number}
+ * if this object is provided.
+ * @return {Node} The node at the given offset.
+ */
+goog.dom.DomHelper.prototype.getNodeAtOffset = goog.dom.getNodeAtOffset;
+
+
+/**
+ * Returns true if the object is a {@code NodeList}. To qualify as a NodeList,
+ * the object must have a numeric length property and an item function (which
+ * has type 'string' on IE for some reason).
+ * @param {Object} val Object to test.
+ * @return {boolean} Whether the object is a NodeList.
+ */
+goog.dom.DomHelper.prototype.isNodeList = goog.dom.isNodeList;
+
+
+/**
+ * Walks up the DOM hierarchy returning the first ancestor that has the passed
+ * tag name and/or class name. If the passed element matches the specified
+ * criteria, the element itself is returned.
+ * @param {Node} element The DOM node to start with.
+ * @param {?(goog.dom.TagName|string)=} opt_tag The tag name to match (or
+ * null/undefined to match only based on class name).
+ * @param {?string=} opt_class The class name to match (or null/undefined to
+ * match only based on tag name).
+ * @param {number=} opt_maxSearchSteps Maximum number of levels to search up the
+ * dom.
+ * @return {Element} The first ancestor that matches the passed criteria, or
+ * null if no match is found.
+ */
+goog.dom.DomHelper.prototype.getAncestorByTagNameAndClass =
+ goog.dom.getAncestorByTagNameAndClass;
+
+
+/**
+ * Walks up the DOM hierarchy returning the first ancestor that has the passed
+ * class name. If the passed element matches the specified criteria, the
+ * element itself is returned.
+ * @param {Node} element The DOM node to start with.
+ * @param {string} class The class name to match.
+ * @param {number=} opt_maxSearchSteps Maximum number of levels to search up the
+ * dom.
+ * @return {Element} The first ancestor that matches the passed criteria, or
+ * null if none match.
+ */
+goog.dom.DomHelper.prototype.getAncestorByClass = goog.dom.getAncestorByClass;
+
+
+/**
+ * Walks up the DOM hierarchy returning the first ancestor that passes the
+ * matcher function.
+ * @param {Node} element The DOM node to start with.
+ * @param {function(Node) : boolean} matcher A function that returns true if the
+ * passed node matches the desired criteria.
+ * @param {boolean=} opt_includeNode If true, the node itself is included in
+ * the search (the first call to the matcher will pass startElement as
+ * the node to test).
+ * @param {number=} opt_maxSearchSteps Maximum number of levels to search up the
+ * dom.
+ * @return {Node} DOM node that matched the matcher, or null if there was
+ * no match.
+ */
+goog.dom.DomHelper.prototype.getAncestor = goog.dom.getAncestor;
diff --git a/src/http/static/viz/1/goog/dom/nodetype.js b/src/http/static/viz/1/goog/dom/nodetype.js
new file mode 100644
index 0000000..cccb470
--- /dev/null
+++ b/src/http/static/viz/1/goog/dom/nodetype.js
@@ -0,0 +1,48 @@
+// Copyright 2006 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Definition of goog.dom.NodeType.
+ */
+
+goog.provide('goog.dom.NodeType');
+
+
+/**
+ * Constants for the nodeType attribute in the Node interface.
+ *
+ * These constants match those specified in the Node interface. These are
+ * usually present on the Node object in recent browsers, but not in older
+ * browsers (specifically, early IEs) and thus are given here.
+ *
+ * In some browsers (early IEs), these are not defined on the Node object,
+ * so they are provided here.
+ *
+ * See http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-1950641247
+ * @enum {number}
+ */
+goog.dom.NodeType = {
+ ELEMENT: 1,
+ ATTRIBUTE: 2,
+ TEXT: 3,
+ CDATA_SECTION: 4,
+ ENTITY_REFERENCE: 5,
+ ENTITY: 6,
+ PROCESSING_INSTRUCTION: 7,
+ COMMENT: 8,
+ DOCUMENT: 9,
+ DOCUMENT_TYPE: 10,
+ DOCUMENT_FRAGMENT: 11,
+ NOTATION: 12
+};
diff --git a/src/http/static/viz/1/goog/dom/safe.js b/src/http/static/viz/1/goog/dom/safe.js
new file mode 100644
index 0000000..012ad22
--- /dev/null
+++ b/src/http/static/viz/1/goog/dom/safe.js
@@ -0,0 +1,372 @@
+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Type-safe wrappers for unsafe DOM APIs.
+ *
+ * This file provides type-safe wrappers for DOM APIs that can result in
+ * cross-site scripting (XSS) vulnerabilities, if the API is supplied with
+ * untrusted (attacker-controlled) input. Instead of plain strings, the type
+ * safe wrappers consume values of types from the goog.html package whose
+ * contract promises that values are safe to use in the corresponding context.
+ *
+ * Hence, a program that exclusively uses the wrappers in this file (i.e., whose
+ * only reference to security-sensitive raw DOM APIs are in this file) is
+ * guaranteed to be free of XSS due to incorrect use of such DOM APIs (modulo
+ * correctness of code that produces values of the respective goog.html types,
+ * and absent code that violates type safety).
+ *
+ * For example, assigning to an element's .innerHTML property a string that is
+ * derived (even partially) from untrusted input typically results in an XSS
+ * vulnerability. The type-safe wrapper goog.html.setInnerHtml consumes a value
+ * of type goog.html.SafeHtml, whose contract states that using its values in a
+ * HTML context will not result in XSS. Hence a program that is free of direct
+ * assignments to any element's innerHTML property (with the exception of the
+ * assignment to .innerHTML in this file) is guaranteed to be free of XSS due to
+ * assignment of untrusted strings to the innerHTML property.
+ */
+
+goog.provide('goog.dom.safe');
+goog.provide('goog.dom.safe.InsertAdjacentHtmlPosition');
+
+goog.require('goog.asserts');
+goog.require('goog.html.SafeHtml');
+goog.require('goog.html.SafeUrl');
+goog.require('goog.html.TrustedResourceUrl');
+goog.require('goog.string');
+goog.require('goog.string.Const');
+
+
+/** @enum {string} */
+goog.dom.safe.InsertAdjacentHtmlPosition = {
+ AFTERBEGIN: 'afterbegin',
+ AFTEREND: 'afterend',
+ BEFOREBEGIN: 'beforebegin',
+ BEFOREEND: 'beforeend'
+};
+
+
+/**
+ * Inserts known-safe HTML into a Node, at the specified position.
+ * @param {!Node} node The node on which to call insertAdjacentHTML.
+ * @param {!goog.dom.safe.InsertAdjacentHtmlPosition} position Position where
+ * to insert the HTML.
+ * @param {!goog.html.SafeHtml} html The known-safe HTML to insert.
+ */
+goog.dom.safe.insertAdjacentHtml = function(node, position, html) {
+ node.insertAdjacentHTML(position, goog.html.SafeHtml.unwrap(html));
+};
+
+
+/**
+ * Assigns known-safe HTML to an element's innerHTML property.
+ * @param {!Element} elem The element whose innerHTML is to be assigned to.
+ * @param {!goog.html.SafeHtml} html The known-safe HTML to assign.
+ */
+goog.dom.safe.setInnerHtml = function(elem, html) {
+ elem.innerHTML = goog.html.SafeHtml.unwrap(html);
+};
+
+
+/**
+ * Assigns known-safe HTML to an element's outerHTML property.
+ * @param {!Element} elem The element whose outerHTML is to be assigned to.
+ * @param {!goog.html.SafeHtml} html The known-safe HTML to assign.
+ */
+goog.dom.safe.setOuterHtml = function(elem, html) {
+ elem.outerHTML = goog.html.SafeHtml.unwrap(html);
+};
+
+
+/**
+ * Writes known-safe HTML to a document.
+ * @param {!Document} doc The document to be written to.
+ * @param {!goog.html.SafeHtml} html The known-safe HTML to assign.
+ */
+goog.dom.safe.documentWrite = function(doc, html) {
+ doc.write(goog.html.SafeHtml.unwrap(html));
+};
+
+
+/**
+ * Safely assigns a URL to an anchor element's href property.
+ *
+ * If url is of type goog.html.SafeUrl, its value is unwrapped and assigned to
+ * anchor's href property. If url is of type string however, it is first
+ * sanitized using goog.html.SafeUrl.sanitize.
+ *
+ * Example usage:
+ * goog.dom.safe.setAnchorHref(anchorEl, url);
+ * which is a safe alternative to
+ * anchorEl.href = url;
+ * The latter can result in XSS vulnerabilities if url is a
+ * user-/attacker-controlled value.
+ *
+ * @param {!HTMLAnchorElement} anchor The anchor element whose href property
+ * is to be assigned to.
+ * @param {string|!goog.html.SafeUrl} url The URL to assign.
+ * @see goog.html.SafeUrl#sanitize
+ */
+goog.dom.safe.setAnchorHref = function(anchor, url) {
+ /** @type {!goog.html.SafeUrl} */
+ var safeUrl;
+ if (url instanceof goog.html.SafeUrl) {
+ safeUrl = url;
+ } else {
+ safeUrl = goog.html.SafeUrl.sanitize(url);
+ }
+ anchor.href = goog.html.SafeUrl.unwrap(safeUrl);
+};
+
+
+/**
+ * Safely assigns a URL to an image element's src property.
+ *
+ * If url is of type goog.html.SafeUrl, its value is unwrapped and assigned to
+ * image's src property. If url is of type string however, it is first
+ * sanitized using goog.html.SafeUrl.sanitize.
+ *
+ * @param {!HTMLImageElement} imageElement The image element whose src property
+ * is to be assigned to.
+ * @param {string|!goog.html.SafeUrl} url The URL to assign.
+ * @see goog.html.SafeUrl#sanitize
+ */
+goog.dom.safe.setImageSrc = function(imageElement, url) {
+ /** @type {!goog.html.SafeUrl} */
+ var safeUrl;
+ if (url instanceof goog.html.SafeUrl) {
+ safeUrl = url;
+ } else {
+ safeUrl = goog.html.SafeUrl.sanitize(url);
+ }
+ imageElement.src = goog.html.SafeUrl.unwrap(safeUrl);
+};
+
+
+/**
+ * Safely assigns a URL to an embed element's src property.
+ *
+ * Example usage:
+ * goog.dom.safe.setEmbedSrc(embedEl, url);
+ * which is a safe alternative to
+ * embedEl.src = url;
+ * The latter can result in loading untrusted code unless it is ensured that
+ * the URL refers to a trustworthy resource.
+ *
+ * @param {!HTMLEmbedElement} embed The embed element whose src property
+ * is to be assigned to.
+ * @param {!goog.html.TrustedResourceUrl} url The URL to assign.
+ */
+goog.dom.safe.setEmbedSrc = function(embed, url) {
+ embed.src = goog.html.TrustedResourceUrl.unwrap(url);
+};
+
+
+/**
+ * Safely assigns a URL to a frame element's src property.
+ *
+ * Example usage:
+ * goog.dom.safe.setFrameSrc(frameEl, url);
+ * which is a safe alternative to
+ * frameEl.src = url;
+ * The latter can result in loading untrusted code unless it is ensured that
+ * the URL refers to a trustworthy resource.
+ *
+ * @param {!HTMLFrameElement} frame The frame element whose src property
+ * is to be assigned to.
+ * @param {!goog.html.TrustedResourceUrl} url The URL to assign.
+ */
+goog.dom.safe.setFrameSrc = function(frame, url) {
+ frame.src = goog.html.TrustedResourceUrl.unwrap(url);
+};
+
+
+/**
+ * Safely assigns a URL to an iframe element's src property.
+ *
+ * Example usage:
+ * goog.dom.safe.setIframeSrc(iframeEl, url);
+ * which is a safe alternative to
+ * iframeEl.src = url;
+ * The latter can result in loading untrusted code unless it is ensured that
+ * the URL refers to a trustworthy resource.
+ *
+ * @param {!HTMLIFrameElement} iframe The iframe element whose src property
+ * is to be assigned to.
+ * @param {!goog.html.TrustedResourceUrl} url The URL to assign.
+ */
+goog.dom.safe.setIframeSrc = function(iframe, url) {
+ iframe.src = goog.html.TrustedResourceUrl.unwrap(url);
+};
+
+
+/**
+ * Safely sets a link element's href and rel properties. Whether or not
+ * the URL assigned to href has to be a goog.html.TrustedResourceUrl
+ * depends on the value of the rel property. If rel contains "stylesheet"
+ * then a TrustedResourceUrl is required.
+ *
+ * Example usage:
+ * goog.dom.safe.setLinkHrefAndRel(linkEl, url, 'stylesheet');
+ * which is a safe alternative to
+ * linkEl.rel = 'stylesheet';
+ * linkEl.href = url;
+ * The latter can result in loading untrusted code unless it is ensured that
+ * the URL refers to a trustworthy resource.
+ *
+ * @param {!HTMLLinkElement} link The link element whose href property
+ * is to be assigned to.
+ * @param {string|!goog.html.SafeUrl|!goog.html.TrustedResourceUrl} url The URL
+ * to assign to the href property. Must be a TrustedResourceUrl if the
+ * value assigned to rel contains "stylesheet". A string value is
+ * sanitized with goog.html.SafeUrl.sanitize.
+ * @param {string} rel The value to assign to the rel property.
+ * @throws {Error} if rel contains "stylesheet" and url is not a
+ * TrustedResourceUrl
+ * @see goog.html.SafeUrl#sanitize
+ */
+goog.dom.safe.setLinkHrefAndRel = function(link, url, rel) {
+ link.rel = rel;
+ if (goog.string.caseInsensitiveContains(rel, 'stylesheet')) {
+ goog.asserts.assert(
+ url instanceof goog.html.TrustedResourceUrl,
+ 'URL must be TrustedResourceUrl because "rel" contains "stylesheet"');
+ link.href = goog.html.TrustedResourceUrl.unwrap(url);
+ } else if (url instanceof goog.html.TrustedResourceUrl) {
+ link.href = goog.html.TrustedResourceUrl.unwrap(url);
+ } else if (url instanceof goog.html.SafeUrl) {
+ link.href = goog.html.SafeUrl.unwrap(url);
+ } else { // string
+ // SafeUrl.sanitize must return legitimate SafeUrl when passed a string.
+ link.href = goog.html.SafeUrl.sanitize(url).getTypedStringValue();
+ }
+};
+
+
+/**
+ * Safely assigns a URL to an object element's data property.
+ *
+ * Example usage:
+ * goog.dom.safe.setObjectData(objectEl, url);
+ * which is a safe alternative to
+ * objectEl.data = url;
+ * The latter can result in loading untrusted code unless setit is ensured that
+ * the URL refers to a trustworthy resource.
+ *
+ * @param {!HTMLObjectElement} object The object element whose data property
+ * is to be assigned to.
+ * @param {!goog.html.TrustedResourceUrl} url The URL to assign.
+ */
+goog.dom.safe.setObjectData = function(object, url) {
+ object.data = goog.html.TrustedResourceUrl.unwrap(url);
+};
+
+
+/**
+ * Safely assigns a URL to an iframe element's src property.
+ *
+ * Example usage:
+ * goog.dom.safe.setScriptSrc(scriptEl, url);
+ * which is a safe alternative to
+ * scriptEl.src = url;
+ * The latter can result in loading untrusted code unless it is ensured that
+ * the URL refers to a trustworthy resource.
+ *
+ * @param {!HTMLScriptElement} script The script element whose src property
+ * is to be assigned to.
+ * @param {!goog.html.TrustedResourceUrl} url The URL to assign.
+ */
+goog.dom.safe.setScriptSrc = function(script, url) {
+ script.src = goog.html.TrustedResourceUrl.unwrap(url);
+};
+
+
+/**
+ * Safely assigns a URL to a Location object's href property.
+ *
+ * If url is of type goog.html.SafeUrl, its value is unwrapped and assigned to
+ * loc's href property. If url is of type string however, it is first sanitized
+ * using goog.html.SafeUrl.sanitize.
+ *
+ * Example usage:
+ * goog.dom.safe.setLocationHref(document.location, redirectUrl);
+ * which is a safe alternative to
+ * document.location.href = redirectUrl;
+ * The latter can result in XSS vulnerabilities if redirectUrl is a
+ * user-/attacker-controlled value.
+ *
+ * @param {!Location} loc The Location object whose href property is to be
+ * assigned to.
+ * @param {string|!goog.html.SafeUrl} url The URL to assign.
+ * @see goog.html.SafeUrl#sanitize
+ */
+goog.dom.safe.setLocationHref = function(loc, url) {
+ /** @type {!goog.html.SafeUrl} */
+ var safeUrl;
+ if (url instanceof goog.html.SafeUrl) {
+ safeUrl = url;
+ } else {
+ safeUrl = goog.html.SafeUrl.sanitize(url);
+ }
+ loc.href = goog.html.SafeUrl.unwrap(safeUrl);
+};
+
+
+/**
+ * Safely opens a URL in a new window (via window.open).
+ *
+ * If url is of type goog.html.SafeUrl, its value is unwrapped and passed in to
+ * window.open. If url is of type string however, it is first sanitized
+ * using goog.html.SafeUrl.sanitize.
+ *
+ * Note that this function does not prevent leakages via the referer that is
+ * sent by window.open. It is advised to only use this to open 1st party URLs.
+ *
+ * Example usage:
+ * goog.dom.safe.openInWindow(url);
+ * which is a safe alternative to
+ * window.open(url);
+ * The latter can result in XSS vulnerabilities if redirectUrl is a
+ * user-/attacker-controlled value.
+ *
+ * @param {string|!goog.html.SafeUrl} url The URL to open.
+ * @param {Window=} opt_openerWin Window of which to call the .open() method.
+ * Defaults to the global window.
+ * @param {!goog.string.Const=} opt_name Name of the window to open in. Can be
+ * _top, etc as allowed by window.open().
+ * @param {string=} opt_specs Comma-separated list of specifications, same as
+ * in window.open().
+ * @param {boolean=} opt_replace Whether to replace the current entry in browser
+ * history, same as in window.open().
+ * @return {Window} Window the url was opened in.
+ */
+goog.dom.safe.openInWindow = function(
+ url, opt_openerWin, opt_name, opt_specs, opt_replace) {
+ /** @type {!goog.html.SafeUrl} */
+ var safeUrl;
+ if (url instanceof goog.html.SafeUrl) {
+ safeUrl = url;
+ } else {
+ safeUrl = goog.html.SafeUrl.sanitize(url);
+ }
+ var win = opt_openerWin || window;
+ return win.open(
+ goog.html.SafeUrl.unwrap(safeUrl),
+ // If opt_name is undefined, simply passing that in to open() causes IE to
+ // reuse the current window instead of opening a new one. Thus we pass ''
+ // in instead, which according to spec opens a new window. See
+ // https://html.spec.whatwg.org/multipage/browsers.html#dom-open .
+ opt_name ? goog.string.Const.unwrap(opt_name) : '', opt_specs,
+ opt_replace);
+};
diff --git a/src/http/static/viz/1/goog/dom/tagname.js b/src/http/static/viz/1/goog/dom/tagname.js
new file mode 100644
index 0000000..ad44d85
--- /dev/null
+++ b/src/http/static/viz/1/goog/dom/tagname.js
@@ -0,0 +1,160 @@
+// Copyright 2007 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Defines the goog.dom.TagName enum. This enumerates
+ * all HTML tag names specified in either the the W3C HTML 4.01 index of
+ * elements or the HTML5 draft specification.
+ *
+ * References:
+ * http://www.w3.org/TR/html401/index/elements.html
+ * http://dev.w3.org/html5/spec/section-index.html
+ *
+ */
+goog.provide('goog.dom.TagName');
+
+
+/**
+ * Enum of all html tag names specified by the W3C HTML4.01 and HTML5
+ * specifications.
+ * @enum {string}
+ */
+goog.dom.TagName = {
+ A: 'A',
+ ABBR: 'ABBR',
+ ACRONYM: 'ACRONYM',
+ ADDRESS: 'ADDRESS',
+ APPLET: 'APPLET',
+ AREA: 'AREA',
+ ARTICLE: 'ARTICLE',
+ ASIDE: 'ASIDE',
+ AUDIO: 'AUDIO',
+ B: 'B',
+ BASE: 'BASE',
+ BASEFONT: 'BASEFONT',
+ BDI: 'BDI',
+ BDO: 'BDO',
+ BIG: 'BIG',
+ BLOCKQUOTE: 'BLOCKQUOTE',
+ BODY: 'BODY',
+ BR: 'BR',
+ BUTTON: 'BUTTON',
+ CANVAS: 'CANVAS',
+ CAPTION: 'CAPTION',
+ CENTER: 'CENTER',
+ CITE: 'CITE',
+ CODE: 'CODE',
+ COL: 'COL',
+ COLGROUP: 'COLGROUP',
+ COMMAND: 'COMMAND',
+ DATA: 'DATA',
+ DATALIST: 'DATALIST',
+ DD: 'DD',
+ DEL: 'DEL',
+ DETAILS: 'DETAILS',
+ DFN: 'DFN',
+ DIALOG: 'DIALOG',
+ DIR: 'DIR',
+ DIV: 'DIV',
+ DL: 'DL',
+ DT: 'DT',
+ EM: 'EM',
+ EMBED: 'EMBED',
+ FIELDSET: 'FIELDSET',
+ FIGCAPTION: 'FIGCAPTION',
+ FIGURE: 'FIGURE',
+ FONT: 'FONT',
+ FOOTER: 'FOOTER',
+ FORM: 'FORM',
+ FRAME: 'FRAME',
+ FRAMESET: 'FRAMESET',
+ H1: 'H1',
+ H2: 'H2',
+ H3: 'H3',
+ H4: 'H4',
+ H5: 'H5',
+ H6: 'H6',
+ HEAD: 'HEAD',
+ HEADER: 'HEADER',
+ HGROUP: 'HGROUP',
+ HR: 'HR',
+ HTML: 'HTML',
+ I: 'I',
+ IFRAME: 'IFRAME',
+ IMG: 'IMG',
+ INPUT: 'INPUT',
+ INS: 'INS',
+ ISINDEX: 'ISINDEX',
+ KBD: 'KBD',
+ KEYGEN: 'KEYGEN',
+ LABEL: 'LABEL',
+ LEGEND: 'LEGEND',
+ LI: 'LI',
+ LINK: 'LINK',
+ MAP: 'MAP',
+ MARK: 'MARK',
+ MATH: 'MATH',
+ MENU: 'MENU',
+ META: 'META',
+ METER: 'METER',
+ NAV: 'NAV',
+ NOFRAMES: 'NOFRAMES',
+ NOSCRIPT: 'NOSCRIPT',
+ OBJECT: 'OBJECT',
+ OL: 'OL',
+ OPTGROUP: 'OPTGROUP',
+ OPTION: 'OPTION',
+ OUTPUT: 'OUTPUT',
+ P: 'P',
+ PARAM: 'PARAM',
+ PRE: 'PRE',
+ PROGRESS: 'PROGRESS',
+ Q: 'Q',
+ RP: 'RP',
+ RT: 'RT',
+ RUBY: 'RUBY',
+ S: 'S',
+ SAMP: 'SAMP',
+ SCRIPT: 'SCRIPT',
+ SECTION: 'SECTION',
+ SELECT: 'SELECT',
+ SMALL: 'SMALL',
+ SOURCE: 'SOURCE',
+ SPAN: 'SPAN',
+ STRIKE: 'STRIKE',
+ STRONG: 'STRONG',
+ STYLE: 'STYLE',
+ SUB: 'SUB',
+ SUMMARY: 'SUMMARY',
+ SUP: 'SUP',
+ SVG: 'SVG',
+ TABLE: 'TABLE',
+ TBODY: 'TBODY',
+ TD: 'TD',
+ TEMPLATE: 'TEMPLATE',
+ TEXTAREA: 'TEXTAREA',
+ TFOOT: 'TFOOT',
+ TH: 'TH',
+ THEAD: 'THEAD',
+ TIME: 'TIME',
+ TITLE: 'TITLE',
+ TR: 'TR',
+ TRACK: 'TRACK',
+ TT: 'TT',
+ U: 'U',
+ UL: 'UL',
+ VAR: 'VAR',
+ VIDEO: 'VIDEO',
+ WBR: 'WBR'
+};
diff --git a/src/http/static/viz/1/goog/dom/tags.js b/src/http/static/viz/1/goog/dom/tags.js
new file mode 100644
index 0000000..7c12938
--- /dev/null
+++ b/src/http/static/viz/1/goog/dom/tags.js
@@ -0,0 +1,41 @@
+// Copyright 2014 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Utilities for HTML element tag names.
+ */
+goog.provide('goog.dom.tags');
+
+goog.require('goog.object');
+
+
+/**
+ * The void elements specified by
+ * http://www.w3.org/TR/html-markup/syntax.html#void-elements.
+ * @const @private {!Object<string, boolean>}
+ */
+goog.dom.tags.VOID_TAGS_ = goog.object.createSet(
+ 'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input',
+ 'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr');
+
+
+/**
+ * Checks whether the tag is void (with no contents allowed and no legal end
+ * tag), for example 'br'.
+ * @param {string} tagName The tag name in lower case.
+ * @return {boolean}
+ */
+goog.dom.tags.isVoidTag = function(tagName) {
+ return goog.dom.tags.VOID_TAGS_[tagName] === true;
+};