# Code coverage report for src/dom/PosAnimation.Timer.js

## Statements: 3.45% (1 / 29) Branches: 10% (1 / 10) Functions: 0% (0 / 7) Lines: 3.57% (1 / 28)

All files » src/dom/ » PosAnimation.Timer.js

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     /*
     * L.PosAnimation fallback implementation that powers Leaflet pan animations
     * in browsers that don't support CSS3 Transitions.
     */

    L.PosAnimation = L.DomUtil.TRANSITION ? L.PosAnimation : L.PosAnimation.extend({

    	run: function (el, newPos, duration, easeLinearity) { // (HTMLElement, Point[, Number, Number])
    		this.stop();

    		this._el = el;
    		this._inProgress = true;
    		this._duration = duration || 0.25;
    		this._easeOutPower = 1 / Math.max(easeLinearity || 0.5, 0.2);

    		this._startPos = L.DomUtil.getPosition(el);
    		this._offset = newPos.subtract(this._startPos);
    		this._startTime = +new Date();

    		this.fire('start');

    		this._animate();
    	},

    	stop: function () {
    		if (!this._inProgress) { return; }

    		this._step();
    		this._complete();
    	},

    	_animate: function () {
    		// animation loop
    		this._animId = L.Util.requestAnimFrame(this._animate, this);
    		this._step();
    	},

    	_step: function () {
    		var elapsed = (+new Date()) - this._startTime,
    		    duration = this._duration * 1000;

    		if (elapsed < duration) {
    			this._runFrame(this._easeOut(elapsed / duration));
    		} else {
    			this._runFrame(1);
    			this._complete();
    		}
    	},

    	_runFrame: function (progress) {
    		var pos = this._startPos.add(this._offset.multiplyBy(progress));
    		L.DomUtil.setPosition(this._el, pos);

    		this.fire('step');
    	},

    	_complete: function () {
    		L.Util.cancelAnimFrame(this._animId);

    		this._inProgress = false;
    		this.fire('end');
    	},

    	_easeOut: function (t) {
    		return 1 - Math.pow(1 - t, this._easeOutPower);
    	}
    });