angular-weblineindia-qrcode-scanner-dg
Version:
An AngularJS based Barcode / QRCode scanner component.
71 lines • 2.44 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/**
* RSS util functions.
*/
var RSSUtils = /** @class */ (function () {
function RSSUtils() {
}
RSSUtils.prototype.RSSUtils = function () { };
RSSUtils.getRSSvalue = function (widths, maxWidth, noNarrow) {
var n = 0;
for (var _i = 0, widths_1 = widths; _i < widths_1.length; _i++) {
var width = widths_1[_i];
n += width;
}
var val = 0;
var narrowMask = 0;
var elements = widths.length;
for (var bar = 0; bar < elements - 1; bar++) {
var elmWidth = void 0;
for (elmWidth = 1, narrowMask |= 1 << bar; elmWidth < widths[bar]; elmWidth++, narrowMask &= ~(1 << bar)) {
var subVal = RSSUtils.combins(n - elmWidth - 1, elements - bar - 2);
if (noNarrow && (narrowMask === 0) && (n - elmWidth - (elements - bar - 1) >= elements - bar - 1)) {
subVal -= RSSUtils.combins(n - elmWidth - (elements - bar), elements - bar - 2);
}
if (elements - bar - 1 > 1) {
var lessVal = 0;
for (var mxwElement = n - elmWidth - (elements - bar - 2); mxwElement > maxWidth; mxwElement--) {
lessVal += RSSUtils.combins(n - elmWidth - mxwElement - 1, elements - bar - 3);
}
subVal -= lessVal * (elements - 1 - bar);
}
else if (n - elmWidth > maxWidth) {
subVal--;
}
val += subVal;
}
n -= elmWidth;
}
return val;
};
RSSUtils.combins = function (n, r) {
var maxDenom;
var minDenom;
if (n - r > r) {
minDenom = r;
maxDenom = n - r;
}
else {
minDenom = n - r;
maxDenom = r;
}
var val = 1;
var j = 1;
for (var i = n; i > maxDenom; i--) {
val *= i;
if (j <= minDenom) {
val /= j;
j++;
}
}
while ((j <= minDenom)) {
val /= j;
j++;
}
return val;
};
return RSSUtils;
}());
exports.default = RSSUtils;
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