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/*
        Copyright (c) 2004-2006, The Dojo Foundation
        All Rights Reserved.

        Licensed under the Academic Free License version 2.1 or above OR the
        modified BSD license. For more information on Dojo licensing, see:

                http://dojotoolkit.org/community/licensing.shtml
*/



dojo.provide("dojo.animation.Animation");
dojo.require("dojo.animation.AnimationEvent");
dojo.require("dojo.lang.func");
dojo.require("dojo.math");
dojo.require("dojo.math.curves");
dojo.deprecated("dojo.animation.Animation is slated for removal in 0.5; use dojo.lfx.* instead.", "0.5");
dojo.animation.Animation = function (curve, duration, accel, repeatCount, rate) {
        if (dojo.lang.isArray(curve)) {
                curve = new dojo.math.curves.Line(curve[0], curve[1]);
        }
        this.curve = curve;
        this.duration = duration;
        this.repeatCount = repeatCount || 0;
        this.rate = rate || 25;
        if (accel) {
                if (dojo.lang.isFunction(accel.getValue)) {
                        this.accel = accel;
                } else {
                        var i = 0.35 * accel + 0.5;
                        this.accel = new dojo.math.curves.CatmullRom([[0], [i], [1]], 0.45);
                }
        }
};
dojo.lang.extend(dojo.animation.Animation, {curve:null, duration:0, repeatCount:0, accel:null, onBegin:null, onAnimate:null, onEnd:null, onPlay:null, onPause:null, onStop:null, handler:null, _animSequence:null, _startTime:null, _endTime:null, _lastFrame:null, _timer:null, _percent:0, _active:false, _paused:false, _startRepeatCount:0, play:function (gotoStart) {
        if (gotoStart) {
                clearTimeout(this._timer);
                this._active = false;
                this._paused = false;
                this._percent = 0;
        } else {
                if (this._active && !this._paused) {
                        return;
                }
        }
        this._startTime = new Date().valueOf();
        if (this._paused) {
                this._startTime -= (this.duration * this._percent / 100);
        }
        this._endTime = this._startTime + this.duration;
        this._lastFrame = this._startTime;
        var e = new dojo.animation.AnimationEvent(this, null, this.curve.getValue(this._percent), this._startTime, this._startTime, this._endTime, this.duration, this._percent, 0);
        this._active = true;
        this._paused = false;
        if (this._percent == 0) {
                if (!this._startRepeatCount) {
                        this._startRepeatCount = this.repeatCount;
                }
                e.type = "begin";
                if (typeof this.handler == "function") {
                        this.handler(e);
                }
                if (typeof this.onBegin == "function") {
                        this.onBegin(e);
                }
        }
        e.type = "play";
        if (typeof this.handler == "function") {
                this.handler(e);
        }
        if (typeof this.onPlay == "function") {
                this.onPlay(e);
        }
        if (this._animSequence) {
                this._animSequence._setCurrent(this);
        }
        this._cycle();
}, pause:function () {
        clearTimeout(this._timer);
        if (!this._active) {
                return;
        }
        this._paused = true;
        var e = new dojo.animation.AnimationEvent(this, "pause", this.curve.getValue(this._percent), this._startTime, new Date().valueOf(), this._endTime, this.duration, this._percent, 0);
        if (typeof this.handler == "function") {
                this.handler(e);
        }
        if (typeof this.onPause == "function") {
                this.onPause(e);
        }
}, playPause:function () {
        if (!this._active || this._paused) {
                this.play();
        } else {
                this.pause();
        }
}, gotoPercent:function (pct, andPlay) {
        clearTimeout(this._timer);
        this._active = true;
        this._paused = true;
        this._percent = pct;
        if (andPlay) {
                this.play();
        }
}, stop:function (gotoEnd) {
        clearTimeout(this._timer);
        var step = this._percent / 100;
        if (gotoEnd) {
                step = 1;
        }
        var e = new dojo.animation.AnimationEvent(this, "stop", this.curve.getValue(step), this._startTime, new Date().valueOf(), this._endTime, this.duration, this._percent);
        if (typeof this.handler == "function") {
                this.handler(e);
        }
        if (typeof this.onStop == "function") {
                this.onStop(e);
        }
        this._active = false;
        this._paused = false;
}, status:function () {
        if (this._active) {
                return this._paused ? "paused" : "playing";
        } else {
                return "stopped";
        }
}, _cycle:function () {
        clearTimeout(this._timer);
        if (this._active) {
                var curr = new Date().valueOf();
                var step = (curr - this._startTime) / (this._endTime - this._startTime);
                var fps = 1000 / (curr - this._lastFrame);
                this._lastFrame = curr;
                if (step >= 1) {
                        step = 1;
                        this._percent = 100;
                } else {
                        this._percent = step * 100;
                }
                if (this.accel && this.accel.getValue) {
                        step = this.accel.getValue(step);
                }
                var e = new dojo.animation.AnimationEvent(this, "animate", this.curve.getValue(step), this._startTime, curr, this._endTime, this.duration, this._percent, Math.round(fps));
                if (typeof this.handler == "function") {
                        this.handler(e);
                }
                if (typeof this.onAnimate == "function") {
                        this.onAnimate(e);
                }
                if (step < 1) {
                        this._timer = setTimeout(dojo.lang.hitch(this, "_cycle"), this.rate);
                } else {
                        e.type = "end";
                        this._active = false;
                        if (typeof this.handler == "function") {
                                this.handler(e);
                        }
                        if (typeof this.onEnd == "function") {
                                this.onEnd(e);
                        }
                        if (this.repeatCount > 0) {
                                this.repeatCount--;
                                this.play(true);
                        } else {
                                if (this.repeatCount == -1) {
                                        this.play(true);
                                } else {
                                        if (this._startRepeatCount) {
                                                this.repeatCount = this._startRepeatCount;
                                                this._startRepeatCount = 0;
                                        }
                                        if (this._animSequence) {
                                                this._animSequence._playNext();
                                        }
                                }
                        }
                }
        }
}});