ddd-jquery/effects/Tween.js

de-bowerified, de-amdified, de-gruntified... jQuery.

var jQuery = require('../core'), __unnameddep__ = require('../css');
function Tween(elem, options, prop, end, easing) {
    return new Tween.prototype.init(elem, options, prop, end, easing);
}
jQuery.Tween = Tween;
Tween.prototype = {
    constructor: Tween,
    init: function (elem, options, prop, end, easing, unit) {
        this.elem = elem;
        this.prop = prop;
        this.easing = easing || 'swing';
        this.options = options;
        this.start = this.now = this.cur();
        this.end = end;
        this.unit = unit || (jQuery.cssNumber[prop] ? '' : 'px');
    },
    cur: function () {
        var hooks = Tween.propHooks[this.prop];
        return hooks && hooks.get ? hooks.get(this) : Tween.propHooks._default.get(this);
    },
    run: function (percent) {
        var eased, hooks = Tween.propHooks[this.prop];
        if (this.options.duration) {
            this.pos = eased = jQuery.easing[this.easing](percent, this.options.duration * percent, 0, 1, this.options.duration);
        } else {
            this.pos = eased = percent;
        }
        this.now = (this.end - this.start) * eased + this.start;
        if (this.options.step) {
            this.options.step.call(this.elem, this.now, this);
        }
        if (hooks && hooks.set) {
            hooks.set(this);
        } else {
            Tween.propHooks._default.set(this);
        }
        return this;
    }
};
Tween.prototype.init.prototype = Tween.prototype;
Tween.propHooks = {
    _default: {
        get: function (tween) {
            var result;
            if (tween.elem[tween.prop] != null && (!tween.elem.style || tween.elem.style[tween.prop] == null)) {
                return tween.elem[tween.prop];
            }
            result = jQuery.css(tween.elem, tween.prop, '');
            return !result || result === 'auto' ? 0 : result;
        },
        set: function (tween) {
            if (jQuery.fx.step[tween.prop]) {
                jQuery.fx.step[tween.prop](tween);
            } else if (tween.elem.style && (tween.elem.style[jQuery.cssProps[tween.prop]] != null || jQuery.cssHooks[tween.prop])) {
                jQuery.style(tween.elem, tween.prop, tween.now + tween.unit);
            } else {
                tween.elem[tween.prop] = tween.now;
            }
        }
    }
};
Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
    set: function (tween) {
        if (tween.elem.nodeType && tween.elem.parentNode) {
            tween.elem[tween.prop] = tween.now;
        }
    }
};
jQuery.easing = {
    linear: function (p) {
        return p;
    },
    swing: function (p) {
        return 0.5 - Math.cos(p * Math.PI) / 2;
    }
};
jQuery.fx = Tween.prototype.init;
jQuery.fx.step = {};