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// Copyright 2010 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//      http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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 * @fileoverview Browser capability checks for the dom package.
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 *
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 */
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goog.provide('goog.dom.BrowserFeature');
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goog.require('goog.userAgent');
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/**
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 * Enum of browser capabilities.
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 * @enum {boolean}
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 */
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goog.dom.BrowserFeature = {
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  /**
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   * Whether attributes 'name' and 'type' can be added to an element after it's
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   * created. False in Internet Explorer prior to version 9.
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   */
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  CAN_ADD_NAME_OR_TYPE_ATTRIBUTES:
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      !goog.userAgent.IE || goog.userAgent.isDocumentModeOrHigher(9),
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  /**
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   * Whether we can use element.children to access an element's Element
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   * children. Available since Gecko 1.9.1, IE 9. (IE<9 also includes comment
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   * nodes in the collection.)
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   */
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  CAN_USE_CHILDREN_ATTRIBUTE: !goog.userAgent.GECKO && !goog.userAgent.IE ||
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      goog.userAgent.IE && goog.userAgent.isDocumentModeOrHigher(9) ||
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      goog.userAgent.GECKO && goog.userAgent.isVersionOrHigher('1.9.1'),
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  /**
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   * Opera, Safari 3, and Internet Explorer 9 all support innerText but they
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   * include text nodes in script and style tags. Not document-mode-dependent.
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   */
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  CAN_USE_INNER_TEXT:
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      (goog.userAgent.IE && !goog.userAgent.isVersionOrHigher('9')),
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  /**
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   * MSIE, Opera, and Safari>=4 support element.parentElement to access an
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   * element's parent if it is an Element.
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   */
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  CAN_USE_PARENT_ELEMENT_PROPERTY:
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      goog.userAgent.IE || goog.userAgent.OPERA || goog.userAgent.WEBKIT,
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  /**
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   * Whether NoScope elements need a scoped element written before them in
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   * innerHTML.
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   * MSDN: http://msdn.microsoft.com/en-us/library/ms533897(VS.85).aspx#1
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   */
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  INNER_HTML_NEEDS_SCOPED_ELEMENT: goog.userAgent.IE,
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  /**
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   * Whether we use legacy IE range API.
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   */
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  LEGACY_IE_RANGES:
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      goog.userAgent.IE && !goog.userAgent.isDocumentModeOrHigher(9)
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};
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