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keksAccountGUI/node_modulesOLD/css-unit-converter/index.js
2019-08-11 20:48:02 +02:00

121 lines
2.5 KiB
JavaScript

var conversions = {
// length
'px': {
'px': 1,
'cm': 96.0/2.54,
'mm': 96.0/25.4,
'in': 96,
'pt': 96.0/72.0,
'pc': 16
},
'cm': {
'px': 2.54/96.0,
'cm': 1,
'mm': 0.1,
'in': 2.54,
'pt': 2.54/72.0,
'pc': 2.54/6.0
},
'mm': {
'px': 25.4/96.0,
'cm': 10,
'mm': 1,
'in': 25.4,
'pt': 25.4/72.0,
'pc': 25.4/6.0
},
'in': {
'px': 1.0/96.0,
'cm': 1.0/2.54,
'mm': 1.0/25.4,
'in': 1,
'pt': 1.0/72.0,
'pc': 1.0/6.0
},
'pt': {
'px': 0.75,
'cm': 72.0/2.54,
'mm': 72.0/25.4,
'in': 72,
'pt': 1,
'pc': 12
},
'pc': {
'px': 6.0/96.0,
'cm': 6.0/2.54,
'mm': 6.0/25.4,
'in': 6,
'pt': 6.0/72.0,
'pc': 1
},
// angle
'deg': {
'deg': 1,
'grad': 0.9,
'rad': 180/Math.PI,
'turn': 360
},
'grad': {
'deg': 400/360,
'grad': 1,
'rad': 200/Math.PI,
'turn': 400
},
'rad': {
'deg': Math.PI/180,
'grad': Math.PI/200,
'rad': 1,
'turn': Math.PI*2
},
'turn': {
'deg': 1/360,
'grad': 1/400,
'rad': 0.5/Math.PI,
'turn': 1
},
// time
's': {
's': 1,
'ms': 1/1000
},
'ms': {
's': 1000,
'ms': 1
},
// frequency
'Hz': {
'Hz': 1,
'kHz': 1000
},
'kHz': {
'Hz': 1/1000,
'kHz': 1
},
// resolution
'dpi': {
'dpi': 1,
'dpcm': 1.0/2.54,
'dppx': 1/96
},
'dpcm': {
'dpi': 2.54,
'dpcm': 1,
'dppx': 2.54/96.0
},
'dppx': {
'dpi': 96,
'dpcm': 96.0/2.54,
'dppx': 1
}
};
module.exports = function (value, sourceUnit, targetUnit, precision) {
if (!conversions.hasOwnProperty(targetUnit))
throw new Error("Cannot convert to " + targetUnit);
if (!conversions[targetUnit].hasOwnProperty(sourceUnit))
throw new Error("Cannot convert from " + sourceUnit + " to " + targetUnit);
precision = Math.pow(10, parseInt(precision) || 5);
return Math.round((conversions[targetUnit][sourceUnit] * value) * precision) / precision;
};