(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = global || self, factory(global.Spin = {}));
}(this, function (exports) { 'use strict';
var __assign = (undefined && undefined.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var defaults = {
lines: 12,
length: 7,
width: 5,
radius: 10,
scale: 1.0,
corners: 1,
color: '#000',
fadeColor: 'transparent',
animation: 'spinner-line-fade-default',
rotate: 0,
direction: 1,
speed: 1,
zIndex: 2e9,
className: 'spinner',
top: '50%',
left: '50%',
shadow: '0 0 1px transparent',
position: 'absolute',
};
var Spinner = /** @class */ (function () {
function Spinner(opts) {
if (opts === void 0) { opts = {}; }
this.opts = __assign({}, defaults, opts);
}
/**
* Adds the spinner to the given target element. If this instance is already
* spinning, it is automatically removed from its previous target by calling
* stop() internally.
*/
Spinner.prototype.spin = function (target) {
this.stop();
this.el = document.createElement('div');
this.el.className = this.opts.className;
this.el.setAttribute('role', 'progressbar');
css(this.el, {
position: this.opts.position,
width: 0,
zIndex: this.opts.zIndex,
left: this.opts.left,
top: this.opts.top,
transform: "scale(" + this.opts.scale + ")",
});
if (target) {
target.insertBefore(this.el, target.firstChild || null);
}
drawLines(this.el, this.opts);
return this;
};
/**
* Stops and removes the Spinner.
* Stopped spinners may be reused by calling spin() again.
*/
Spinner.prototype.stop = function () {
if (this.el) {
if (typeof requestAnimationFrame !== 'undefined') {
cancelAnimationFrame(this.animateId);
}
else {
clearTimeout(this.animateId);
}
if (this.el.parentNode) {
this.el.parentNode.removeChild(this.el);
}
this.el = undefined;
}
return this;
};
return Spinner;
}());
/**
* Sets multiple style properties at once.
*/
function css(el, props) {
for (var prop in props) {
el.style[prop] = props[prop];
}
return el;
}
/**
* Returns the line color from the given string or array.
*/
function getColor(color, idx) {
return typeof color == 'string' ? color : color[idx % color.length];
}
/**
* Internal method that draws the individual lines.
*/
function drawLines(el, opts) {
var borderRadius = (Math.round(opts.corners * opts.width * 500) / 1000) + 'px';
var shadow = 'none';
if (opts.shadow === true) {
shadow = '0 2px 4px #000'; // default shadow
}
else if (typeof opts.shadow === 'string') {
shadow = opts.shadow;
}
var shadows = parseBoxShadow(shadow);
for (var i = 0; i < opts.lines; i++) {
var degrees = ~~(360 / opts.lines * i + opts.rotate);
var backgroundLine = css(document.createElement('div'), {
position: 'absolute',
top: -opts.width / 2 + "px",
width: (opts.length + opts.width) + 'px',
height: opts.width + 'px',
background: getColor(opts.fadeColor, i),
borderRadius: borderRadius,
transformOrigin: 'left',
transform: "rotate(" + degrees + "deg) translateX(" + opts.radius + "px)",
});
var delay = i * opts.direction / opts.lines / opts.speed;
delay -= 1 / opts.speed; // so initial animation state will include trail
var line = css(document.createElement('div'), {
width: '100%',
height: '100%',
background: getColor(opts.color, i),
borderRadius: borderRadius,
boxShadow: normalizeShadow(shadows, degrees),
animation: 1 / opts.speed + "s linear " + delay + "s infinite " + opts.animation,
});
backgroundLine.appendChild(line);
el.appendChild(backgroundLine);
}
}
function parseBoxShadow(boxShadow) {
var regex = /^\s*([a-zA-Z]+\s+)?(-?\d+(\.\d+)?)([a-zA-Z]*)\s+(-?\d+(\.\d+)?)([a-zA-Z]*)(.*)$/;
var shadows = [];
for (var _i = 0, _a = boxShadow.split(','); _i < _a.length; _i++) {
var shadow = _a[_i];
var matches = shadow.match(regex);
if (matches === null) {
continue; // invalid syntax
}
var x = +matches[2];
var y = +matches[5];
var xUnits = matches[4];
var yUnits = matches[7];
if (x === 0 && !xUnits) {
xUnits = yUnits;
}
if (y === 0 && !yUnits) {
yUnits = xUnits;
}
if (xUnits !== yUnits) {
continue; // units must match to use as coordinates
}
shadows.push({
prefix: matches[1] || '',
x: x,
y: y,
xUnits: xUnits,
yUnits: yUnits,
end: matches[8],
});
}
return shadows;
}
/**
* Modify box-shadow x/y offsets to counteract rotation
*/
function normalizeShadow(shadows, degrees) {
var normalized = [];
for (var _i = 0, shadows_1 = shadows; _i < shadows_1.length; _i++) {
var shadow = shadows_1[_i];
var xy = convertOffset(shadow.x, shadow.y, degrees);
normalized.push(shadow.prefix + xy[0] + shadow.xUnits + ' ' + xy[1] + shadow.yUnits + shadow.end);
}
return normalized.join(', ');
}
function convertOffset(x, y, degrees) {
var radians = degrees * Math.PI / 180;
var sin = Math.sin(radians);
var cos = Math.cos(radians);
return [
Math.round((x * cos + y * sin) * 1000) / 1000,
Math.round((-x * sin + y * cos) * 1000) / 1000,
];
}
exports.Spinner = Spinner;
Object.defineProperty(exports, '__esModule', { value: true });
}));
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