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YUI.add('anim-base', function (Y, NAME) { |
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/** |
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* The Animation Utility provides an API for creating advanced transitions. |
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* @module anim |
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*/ |
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/** |
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* Provides the base Anim class, for animating numeric properties. |
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* |
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* @module anim |
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* @submodule anim-base |
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*/ |
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/** |
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* A class for constructing animation instances. |
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* @class Anim |
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* @for Anim |
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* @constructor |
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* @extends Base |
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*/ |
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var RUNNING = 'running', |
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START_TIME = 'startTime', |
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ELAPSED_TIME = 'elapsedTime', |
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/** |
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* @for Anim |
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* @event start |
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* @description fires when an animation begins. |
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* @param {Event} ev The start event. |
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* @type Event.Custom |
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*/ |
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START = 'start', |
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/** |
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* @event tween |
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* @description fires every frame of the animation. |
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* @param {Event} ev The tween event. |
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* @type Event.Custom |
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*/ |
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TWEEN = 'tween', |
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/** |
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* @event end |
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* @description fires after the animation completes. |
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* @param {Event} ev The end event. |
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* @type Event.Custom |
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*/ |
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END = 'end', |
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NODE = 'node', |
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PAUSED = 'paused', |
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REVERSE = 'reverse', // TODO: cleanup |
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ITERATION_COUNT = 'iterationCount', |
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NUM = Number; |
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var _running = {}, |
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_timer; |
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Y.Anim = function() { |
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Y.Anim.superclass.constructor.apply(this, arguments); |
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Y.Anim._instances[Y.stamp(this)] = this; |
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}; |
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Y.Anim.NAME = 'anim'; |
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Y.Anim._instances = {}; |
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/** |
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* Regex of properties that should use the default unit. |
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* |
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* @property RE_DEFAULT_UNIT |
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* @static |
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*/ |
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Y.Anim.RE_DEFAULT_UNIT = /^width|height|top|right|bottom|left|margin.*|padding.*|border.*$/i; |
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/** |
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* The default unit to use with properties that pass the RE_DEFAULT_UNIT test. |
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* |
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* @property DEFAULT_UNIT |
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* @static |
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*/ |
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Y.Anim.DEFAULT_UNIT = 'px'; |
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Y.Anim.DEFAULT_EASING = function (t, b, c, d) { |
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return c * t / d + b; // linear easing |
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}; |
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/** |
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* Time in milliseconds passed to setInterval for frame processing |
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* |
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* @property intervalTime |
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* @default 20 |
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* @static |
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*/ |
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Y.Anim._intervalTime = 20; |
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/** |
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* Bucket for custom getters and setters |
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* |
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* @property behaviors |
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* @static |
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*/ |
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Y.Anim.behaviors = { |
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left: { |
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get: function(anim, attr) { |
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return anim._getOffset(attr); |
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} |
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} |
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}; |
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Y.Anim.behaviors.top = Y.Anim.behaviors.left; |
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/** |
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* The default setter to use when setting object properties. |
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* |
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* @property DEFAULT_SETTER |
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* @static |
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*/ |
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Y.Anim.DEFAULT_SETTER = function(anim, att, from, to, elapsed, duration, fn, unit) { |
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var node = anim._node, |
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domNode = node._node, |
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val = fn(elapsed, NUM(from), NUM(to) - NUM(from), duration); |
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if (domNode) { |
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if ('style' in domNode && (att in domNode.style || att in Y.DOM.CUSTOM_STYLES)) { |
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unit = unit || ''; |
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node.setStyle(att, val + unit); |
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} else if ('attributes' in domNode && att in domNode.attributes) { |
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node.setAttribute(att, val); |
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} else if (att in domNode) { |
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domNode[att] = val; |
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} |
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} else if (node.set) { |
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node.set(att, val); |
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} else if (att in node) { |
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node[att] = val; |
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} |
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}; |
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/** |
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* The default getter to use when getting object properties. |
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* |
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* @property DEFAULT_GETTER |
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* @static |
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*/ |
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Y.Anim.DEFAULT_GETTER = function(anim, att) { |
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var node = anim._node, |
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domNode = node._node, |
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val = ''; |
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if (domNode) { |
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if ('style' in domNode && (att in domNode.style || att in Y.DOM.CUSTOM_STYLES)) { |
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val = node.getComputedStyle(att); |
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} else if ('attributes' in domNode && att in domNode.attributes) { |
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val = node.getAttribute(att); |
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} else if (att in domNode) { |
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val = domNode[att]; |
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} |
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} else if (node.get) { |
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val = node.get(att); |
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} else if (att in node) { |
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val = node[att]; |
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} |
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return val; |
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}; |
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Y.Anim.ATTRS = { |
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/** |
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* The object to be animated. |
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* @attribute node |
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* @type Node |
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*/ |
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node: { |
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setter: function(node) { |
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if (node) { |
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if (typeof node === 'string' || node.nodeType) { |
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node = Y.one(node); |
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} |
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} |
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this._node = node; |
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if (!node) { |
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Y.log(node + ' is not a valid node', 'warn', 'Anim'); |
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} |
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return node; |
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} |
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}, |
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/** |
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* The length of the animation. Defaults to "1" (second). |
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* @attribute duration |
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* @type NUM |
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*/ |
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duration: { |
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value: 1 |
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}, |
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/** |
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* The method that will provide values to the attribute(s) during the animation. |
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* Defaults to "Easing.easeNone". |
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* @attribute easing |
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* @type Function |
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*/ |
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easing: { |
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value: Y.Anim.DEFAULT_EASING, |
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setter: function(val) { |
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if (typeof val === 'string' && Y.Easing) { |
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return Y.Easing[val]; |
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} |
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} |
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}, |
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/** |
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* The starting values for the animated properties. |
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* |
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* Fields may be strings, numbers, or functions. |
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* If a function is used, the return value becomes the from value. |
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* If no from value is specified, the DEFAULT_GETTER will be used. |
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* Supports any unit, provided it matches the "to" (or default) |
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* unit (e.g. `{width: '10em', color: 'rgb(0, 0, 0)', borderColor: '#ccc'}`). |
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* |
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* If using the default ('px' for length-based units), the unit may be omitted |
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* (e.g. `{width: 100}, borderColor: 'ccc'}`, which defaults to pixels |
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* and hex, respectively). |
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* |
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* @attribute from |
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* @type Object |
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*/ |
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from: {}, |
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/** |
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* The ending values for the animated properties. |
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* |
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* Fields may be strings, numbers, or functions. |
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* Supports any unit, provided it matches the "from" (or default) |
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* unit (e.g. `{width: '50%', color: 'red', borderColor: '#ccc'}`). |
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* |
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* If using the default ('px' for length-based units), the unit may be omitted |
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* (e.g. `{width: 100, borderColor: 'ccc'}`, which defaults to pixels |
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* and hex, respectively). |
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* |
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* @attribute to |
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* @type Object |
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*/ |
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to: {}, |
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/** |
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* Date stamp for the first frame of the animation. |
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* @attribute startTime |
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* @type Int |
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* @default 0 |
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* @readOnly |
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*/ |
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startTime: { |
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value: 0, |
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readOnly: true |
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}, |
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/** |
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* Current time the animation has been running. |
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* @attribute elapsedTime |
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* @type Int |
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* @default 0 |
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* @readOnly |
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*/ |
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elapsedTime: { |
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value: 0, |
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readOnly: true |
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}, |
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/** |
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* Whether or not the animation is currently running. |
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* @attribute running |
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* @type Boolean |
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* @default false |
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* @readOnly |
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*/ |
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running: { |
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getter: function() { |
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return !!_running[Y.stamp(this)]; |
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}, |
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value: false, |
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readOnly: true |
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}, |
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/** |
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* The number of times the animation should run |
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* @attribute iterations |
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* @type Int |
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* @default 1 |
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*/ |
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iterations: { |
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value: 1 |
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}, |
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/** |
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* The number of iterations that have occurred. |
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* Resets when an animation ends (reaches iteration count or stop() called). |
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* @attribute iterationCount |
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* @type Int |
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* @default 0 |
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* @readOnly |
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*/ |
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iterationCount: { |
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value: 0, |
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readOnly: true |
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}, |
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/** |
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* How iterations of the animation should behave. |
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* Possible values are "normal" and "alternate". |
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* Normal will repeat the animation, alternate will reverse on every other pass. |
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* |
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* @attribute direction |
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* @type String |
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* @default "normal" |
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*/ |
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direction: { |
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value: 'normal' // | alternate (fwd on odd, rev on even per spec) |
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}, |
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/** |
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* Whether or not the animation is currently paused. |
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* @attribute paused |
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* @type Boolean |
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* @default false |
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* @readOnly |
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*/ |
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paused: { |
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readOnly: true, |
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value: false |
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}, |
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/** |
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* If true, the `from` and `to` attributes are swapped, |
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* and the animation is then run starting from `from`. |
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* @attribute reverse |
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* @type Boolean |
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* @default false |
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*/ |
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reverse: { |
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value: false |
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} |
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}; |
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/** |
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* Runs all animation instances. |
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* @method run |
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* @static |
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*/ |
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Y.Anim.run = function() { |
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var instances = Y.Anim._instances, |
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i; |
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for (i in instances) { |
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if (instances[i].run) { |
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instances[i].run(); |
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} |
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} |
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}; |
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/** |
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* Pauses all animation instances. |
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* @method pause |
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* @static |
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*/ |
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Y.Anim.pause = function() { |
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for (var i in _running) { // stop timer if nothing running |
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if (_running[i].pause) { |
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_running[i].pause(); |
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} |
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} |
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Y.Anim._stopTimer(); |
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}; |
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/** |
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* Stops all animation instances. |
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* @method stop |
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* @static |
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*/ |
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Y.Anim.stop = function() { |
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for (var i in _running) { // stop timer if nothing running |
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if (_running[i].stop) { |
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_running[i].stop(); |
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} |
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} |
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Y.Anim._stopTimer(); |
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}; |
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Y.Anim._startTimer = function() { |
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if (!_timer) { |
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_timer = setInterval(Y.Anim._runFrame, Y.Anim._intervalTime); |
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} |
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}; |
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Y.Anim._stopTimer = function() { |
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clearInterval(_timer); |
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_timer = 0; |
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}; |
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405 |
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/** |
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* Called per Interval to handle each animation frame. |
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* @method _runFrame |
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* @private |
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* @static |
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*/ |
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Y.Anim._runFrame = function() { |
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var done = true, |
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anim; |
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for (anim in _running) { |
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if (_running[anim]._runFrame) { |
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done = false; |
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_running[anim]._runFrame(); |
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} |
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} |
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421 |
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if (done) { |
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Y.Anim._stopTimer(); |
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} |
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}; |
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426 |
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Y.Anim.RE_UNITS = /^(-?\d*\.?\d*){1}(em|ex|px|in|cm|mm|pt|pc|%)*$/; |
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428 |
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var proto = { |
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430 |
/** |
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431 |
* Starts or resumes an animation. |
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432 |
* @method run |
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* @chainable |
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*/ |
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run: function() { |
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436 |
if (this.get(PAUSED)) { |
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this._resume(); |
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} else if (!this.get(RUNNING)) { |
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this._start(); |
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440 |
} |
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441 |
return this; |
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442 |
}, |
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443 |
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444 |
/** |
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445 |
* Pauses the animation and |
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|
446 |
* freezes it in its current state and time. |
|
|
447 |
* Calling run() will continue where it left off. |
|
|
448 |
* @method pause |
|
|
449 |
* @chainable |
|
|
450 |
*/ |
|
|
451 |
pause: function() { |
|
|
452 |
if (this.get(RUNNING)) { |
|
|
453 |
this._pause(); |
|
|
454 |
} |
|
|
455 |
return this; |
|
|
456 |
}, |
|
|
457 |
|
|
|
458 |
/** |
|
|
459 |
* Stops the animation and resets its time. |
|
|
460 |
* @method stop |
|
|
461 |
* @param {Boolean} finish If true, the animation will move to the last frame |
|
|
462 |
* @chainable |
|
|
463 |
*/ |
|
|
464 |
stop: function(finish) { |
|
|
465 |
if (this.get(RUNNING) || this.get(PAUSED)) { |
|
|
466 |
this._end(finish); |
|
|
467 |
} |
|
|
468 |
return this; |
|
|
469 |
}, |
|
|
470 |
|
|
|
471 |
_added: false, |
|
|
472 |
|
|
|
473 |
_start: function() { |
|
|
474 |
this._set(START_TIME, new Date() - this.get(ELAPSED_TIME)); |
|
|
475 |
this._actualFrames = 0; |
|
|
476 |
if (!this.get(PAUSED)) { |
|
|
477 |
this._initAnimAttr(); |
|
|
478 |
} |
|
|
479 |
_running[Y.stamp(this)] = this; |
|
|
480 |
Y.Anim._startTimer(); |
|
|
481 |
|
|
|
482 |
this.fire(START); |
|
|
483 |
}, |
|
|
484 |
|
|
|
485 |
_pause: function() { |
|
|
486 |
this._set(START_TIME, null); |
|
|
487 |
this._set(PAUSED, true); |
|
|
488 |
delete _running[Y.stamp(this)]; |
|
|
489 |
|
|
|
490 |
/** |
|
|
491 |
* @event pause |
|
|
492 |
* @description fires when an animation is paused. |
|
|
493 |
* @param {Event} ev The pause event. |
|
|
494 |
* @type Event.Custom |
|
|
495 |
*/ |
|
|
496 |
this.fire('pause'); |
|
|
497 |
}, |
|
|
498 |
|
|
|
499 |
_resume: function() { |
|
|
500 |
this._set(PAUSED, false); |
|
|
501 |
_running[Y.stamp(this)] = this; |
|
|
502 |
this._set(START_TIME, new Date() - this.get(ELAPSED_TIME)); |
|
|
503 |
Y.Anim._startTimer(); |
|
|
504 |
|
|
|
505 |
/** |
|
|
506 |
* @event resume |
|
|
507 |
* @description fires when an animation is resumed (run from pause). |
|
|
508 |
* @param {Event} ev The pause event. |
|
|
509 |
* @type Event.Custom |
|
|
510 |
*/ |
|
|
511 |
this.fire('resume'); |
|
|
512 |
}, |
|
|
513 |
|
|
|
514 |
_end: function(finish) { |
|
|
515 |
var duration = this.get('duration') * 1000; |
|
|
516 |
if (finish) { // jump to last frame |
|
|
517 |
this._runAttrs(duration, duration, this.get(REVERSE)); |
|
|
518 |
} |
|
|
519 |
|
|
|
520 |
this._set(START_TIME, null); |
|
|
521 |
this._set(ELAPSED_TIME, 0); |
|
|
522 |
this._set(PAUSED, false); |
|
|
523 |
|
|
|
524 |
delete _running[Y.stamp(this)]; |
|
|
525 |
this.fire(END, {elapsed: this.get(ELAPSED_TIME)}); |
|
|
526 |
}, |
|
|
527 |
|
|
|
528 |
_runFrame: function() { |
|
|
529 |
var d = this._runtimeAttr.duration, |
|
|
530 |
t = new Date() - this.get(START_TIME), |
|
|
531 |
reverse = this.get(REVERSE), |
|
|
532 |
done = (t >= d); |
|
|
533 |
|
|
|
534 |
this._runAttrs(t, d, reverse); |
|
|
535 |
this._actualFrames += 1; |
|
|
536 |
this._set(ELAPSED_TIME, t); |
|
|
537 |
|
|
|
538 |
this.fire(TWEEN); |
|
|
539 |
if (done) { |
|
|
540 |
this._lastFrame(); |
|
|
541 |
} |
|
|
542 |
}, |
|
|
543 |
|
|
|
544 |
_runAttrs: function(t, d, reverse) { |
|
|
545 |
var attr = this._runtimeAttr, |
|
|
546 |
customAttr = Y.Anim.behaviors, |
|
|
547 |
easing = attr.easing, |
|
|
548 |
lastFrame = d, |
|
|
549 |
done = false, |
|
|
550 |
attribute, |
|
|
551 |
setter, |
|
|
552 |
i; |
|
|
553 |
|
|
|
554 |
if (t >= d) { |
|
|
555 |
done = true; |
|
|
556 |
} |
|
|
557 |
|
|
|
558 |
if (reverse) { |
|
|
559 |
t = d - t; |
|
|
560 |
lastFrame = 0; |
|
|
561 |
} |
|
|
562 |
|
|
|
563 |
for (i in attr) { |
|
|
564 |
if (attr[i].to) { |
|
|
565 |
attribute = attr[i]; |
|
|
566 |
setter = (i in customAttr && 'set' in customAttr[i]) ? |
|
|
567 |
customAttr[i].set : Y.Anim.DEFAULT_SETTER; |
|
|
568 |
|
|
|
569 |
if (!done) { |
|
|
570 |
setter(this, i, attribute.from, attribute.to, t, d, easing, attribute.unit); |
|
|
571 |
} else { |
|
|
572 |
setter(this, i, attribute.from, attribute.to, lastFrame, d, easing, attribute.unit); |
|
|
573 |
} |
|
|
574 |
} |
|
|
575 |
} |
|
|
576 |
|
|
|
577 |
|
|
|
578 |
}, |
|
|
579 |
|
|
|
580 |
_lastFrame: function() { |
|
|
581 |
var iter = this.get('iterations'), |
|
|
582 |
iterCount = this.get(ITERATION_COUNT); |
|
|
583 |
|
|
|
584 |
iterCount += 1; |
|
|
585 |
if (iter === 'infinite' || iterCount < iter) { |
|
|
586 |
if (this.get('direction') === 'alternate') { |
|
|
587 |
this.set(REVERSE, !this.get(REVERSE)); // flip it |
|
|
588 |
} |
|
|
589 |
/** |
|
|
590 |
* @event iteration |
|
|
591 |
* @description fires when an animation begins an iteration. |
|
|
592 |
* @param {Event} ev The iteration event. |
|
|
593 |
* @type Event.Custom |
|
|
594 |
*/ |
|
|
595 |
this.fire('iteration'); |
|
|
596 |
} else { |
|
|
597 |
iterCount = 0; |
|
|
598 |
this._end(); |
|
|
599 |
} |
|
|
600 |
|
|
|
601 |
this._set(START_TIME, new Date()); |
|
|
602 |
this._set(ITERATION_COUNT, iterCount); |
|
|
603 |
}, |
|
|
604 |
|
|
|
605 |
_initAnimAttr: function() { |
|
|
606 |
var from = this.get('from') || {}, |
|
|
607 |
to = this.get('to') || {}, |
|
|
608 |
attr = { |
|
|
609 |
duration: this.get('duration') * 1000, |
|
|
610 |
easing: this.get('easing') |
|
|
611 |
}, |
|
|
612 |
customAttr = Y.Anim.behaviors, |
|
|
613 |
node = this.get(NODE), // implicit attr init |
|
|
614 |
unit, begin, end; |
|
|
615 |
|
|
|
616 |
Y.each(to, function(val, name) { |
|
|
617 |
if (typeof val === 'function') { |
|
|
618 |
val = val.call(this, node); |
|
|
619 |
} |
|
|
620 |
|
|
|
621 |
begin = from[name]; |
|
|
622 |
if (begin === undefined) { |
|
|
623 |
begin = (name in customAttr && 'get' in customAttr[name]) ? |
|
|
624 |
customAttr[name].get(this, name) : Y.Anim.DEFAULT_GETTER(this, name); |
|
|
625 |
} else if (typeof begin === 'function') { |
|
|
626 |
begin = begin.call(this, node); |
|
|
627 |
} |
|
|
628 |
|
|
|
629 |
var mFrom = Y.Anim.RE_UNITS.exec(begin), |
|
|
630 |
mTo = Y.Anim.RE_UNITS.exec(val); |
|
|
631 |
|
|
|
632 |
begin = mFrom ? mFrom[1] : begin; |
|
|
633 |
end = mTo ? mTo[1] : val; |
|
|
634 |
unit = mTo ? mTo[2] : mFrom ? mFrom[2] : ''; // one might be zero TODO: mixed units |
|
|
635 |
|
|
|
636 |
if (!unit && Y.Anim.RE_DEFAULT_UNIT.test(name)) { |
|
|
637 |
unit = Y.Anim.DEFAULT_UNIT; |
|
|
638 |
} |
|
|
639 |
|
|
|
640 |
if (!begin || !end) { |
|
|
641 |
Y.error('invalid "from" or "to" for "' + name + '"', 'Anim'); |
|
|
642 |
return; |
|
|
643 |
} |
|
|
644 |
|
|
|
645 |
attr[name] = { |
|
|
646 |
from: Y.Lang.isObject(begin) ? Y.clone(begin) : begin, |
|
|
647 |
to: end, |
|
|
648 |
unit: unit |
|
|
649 |
}; |
|
|
650 |
|
|
|
651 |
}, this); |
|
|
652 |
|
|
|
653 |
this._runtimeAttr = attr; |
|
|
654 |
}, |
|
|
655 |
|
|
|
656 |
|
|
|
657 |
// TODO: move to computedStyle? (browsers dont agree on default computed offsets) |
|
|
658 |
_getOffset: function(attr) { |
|
|
659 |
var node = this._node, |
|
|
660 |
val = node.getComputedStyle(attr), |
|
|
661 |
get = (attr === 'left') ? 'getX': 'getY', |
|
|
662 |
set = (attr === 'left') ? 'setX': 'setY', |
|
|
663 |
position; |
|
|
664 |
|
|
|
665 |
if (val === 'auto') { |
|
|
666 |
position = node.getStyle('position'); |
|
|
667 |
if (position === 'absolute' || position === 'fixed') { |
|
|
668 |
val = node[get](); |
|
|
669 |
node[set](val); |
|
|
670 |
} else { |
|
|
671 |
val = 0; |
|
|
672 |
} |
|
|
673 |
} |
|
|
674 |
|
|
|
675 |
return val; |
|
|
676 |
}, |
|
|
677 |
|
|
|
678 |
destructor: function() { |
|
|
679 |
delete Y.Anim._instances[Y.stamp(this)]; |
|
|
680 |
} |
|
|
681 |
}; |
|
|
682 |
|
|
|
683 |
Y.extend(Y.Anim, Y.Base, proto); |
|
|
684 |
|
|
|
685 |
|
|
|
686 |
}, '@VERSION@', {"requires": ["base-base", "node-style"]}); |