69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
export default {
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angleFromPositions (cx, cy, ex, ey) {
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const theta = Math.atan2(ey - cy, ex - cx) + Math.PI / 2;
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return theta * 180 / Math.PI;
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},
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angle360FromPositions (cx, cy, ex, ey) {
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const angle = this.angleFromPositions(cx, cy, ex, ey);
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return angle < 0 ? 360 + angle : angle;
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},
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range (start = 0, stop = null, step = 1) {
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let [_start, _stop] = [0, start];
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if (stop !== null) {
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[_start, _stop] = [start, stop];
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}
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const length = Math.max(Math.ceil((_stop - _start) / step), 0);
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const range = Array(length);
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for (let idx = 0; idx < length; idx++, _start += step) {
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range[idx] = _start;
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}
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return range;
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},
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round (number, decimals) {
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if (!isNaN(parseFloat(number)) && isFinite(number)) {
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const decimalPower = Math.pow(10, decimals);
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return Math.round(parseFloat(number) * decimalPower) / decimalPower;
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}
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return NaN;
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},
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getViewport () {
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return {
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height: window.innerHeight || document.documentElement.offsetHeight,
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width: window.innerWidth || document.documentElement.offsetWidth
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};
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},
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cloneObject (object) {
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return JSON.parse(JSON.stringify(object));
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},
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inputTypeForPrototype (prototype) {
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if (prototype === Date) return 'date';
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if (prototype === Number) return 'number';
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if (prototype === Boolean) return 'checkbox';
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return 'text';
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},
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prepareValueForInput (value, type) {
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if (type === 'date') return new Date(value).toISOString().slice(0, 10);
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if (type === 'checkbox') {
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return value ? 'on' : '';
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}
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return value;
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},
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removeObjectKey (key, object) {
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const newObject = {};
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Object.keys(object)
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.filter(k => k !== key)
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.forEach(k => { newObject[k] = object[k]; });
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return newObject;
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}
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};
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