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-// Copyright 2011 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 Utility methods to deal with CSS3 transitions
- * programmatically.
- */
-
-goog.provide('goog.style.transition');
-goog.provide('goog.style.transition.Css3Property');
-
-goog.require('goog.array');
-goog.require('goog.asserts');
-goog.require('goog.userAgent');
-
-
-/**
- * A typedef to represent a CSS3 transition property. Duration and delay
- * are both in seconds. Timing is CSS3 timing function string, such as
- * 'easein', 'linear'.
- *
- * Alternatively, specifying string in the form of '[property] [duration]
- * [timing] [delay]' as specified in CSS3 transition is fine too.
- *
- * @typedef { {
- * property: string,
- * duration: number,
- * timing: string,
- * delay: number
- * } | string }
- */
-goog.style.transition.Css3Property;
-
-
-/**
- * Sets the element CSS3 transition to properties.
- * @param {Element} element The element to set transition on.
- * @param {goog.style.transition.Css3Property|
- * Array.<goog.style.transition.Css3Property>} properties A single CSS3
- * transition property or array of properties.
- */
-goog.style.transition.set = function(element, properties) {
- if (!goog.isArray(properties)) {
- properties = [properties];
- }
- goog.asserts.assert(
- properties.length > 0, 'At least one Css3Property should be specified.');
-
- var values = goog.array.map(
- properties, function(p) {
- if (goog.isString(p)) {
- return p;
- } else {
- goog.asserts.assert(p && p.property && goog.isNumber(p.duration) &&
- p.timing && goog.isNumber(p.delay));
- return p.property + ' ' + p.duration + 's ' + p.timing + ' ' +
- p.delay + 's';
- }
- });
- goog.style.transition.setPropertyValue_(element, values.join(','));
-};
-
-
-/**
- * Removes any programmatically-added CSS3 transition in the given element.
- * @param {Element} element The element to remove transition from.
- */
-goog.style.transition.removeAll = function(element) {
- goog.style.transition.setPropertyValue_(element, '');
-};
-
-
-/**
- * @return {boolean} Whether CSS3 transition is supported.
- */
-goog.style.transition.isSupported = function() {
- if (!goog.isDef(goog.style.transition.css3TransitionSupported_)) {
- // Since IE would allow any attribute, we need to explicitly check the
- // browser version here instead.
- if (goog.userAgent.IE) {
- goog.style.transition.css3TransitionSupported_ =
- goog.userAgent.isVersion('10.0');
- } else {
- // We create a test element with style=-webkit-transition, etc.
- // We then detect whether those style properties are recognized and
- // available from js.
- var el = document.createElement('div');
- el.innerHTML = '<div style="-webkit-transition:opacity 1s linear;' +
- '-moz-transition:opacity 1s linear;-o-transition:opacity 1s linear;' +
- 'transition:opacity 1s linear">';
-
- var testElement = el.firstChild;
- goog.style.transition.css3TransitionSupported_ =
- goog.isDef(testElement.style.transition) ||
- goog.isDef(testElement.style.WebkitTransition) ||
- goog.isDef(testElement.style.MozTransition) ||
- goog.isDef(testElement.style.OTransition);
- }
- }
-
- return goog.style.transition.css3TransitionSupported_;
-};
-
-
-/**
- * Whether CSS3 transition is supported.
- * @type {boolean}
- * @private
- */
-goog.style.transition.css3TransitionSupported_;
-
-
-/**
- * Sets CSS3 transition property value to the given value.
- * @param {Element} element The element to set transition on.
- * @param {string} transitionValue The CSS3 transition property value.
- * @private
- */
-goog.style.transition.setPropertyValue_ = function(element, transitionValue) {
- element.style.WebkitTransition = transitionValue;
- element.style.MozTransition = transitionValue;
- element.style.MSTransition = transitionValue;
- element.style.OTransition = transitionValue;
- element.style.transition = transitionValue;
-};