65 lines
2.1 KiB
JavaScript
65 lines
2.1 KiB
JavaScript
angular.module('syncthing.core')
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.directive('identicon', ['$window', function ($window) {
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var svgNS = 'http://www.w3.org/2000/svg';
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function Identicon(value, size) {
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var svg = document.createElementNS(svgNS, 'svg');
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var shouldFillRectAt = function (row, col) {
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return !($window.parseInt(value.charCodeAt(row + col * size), 10) % 2);
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};
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var shouldMirrorRectAt = function (row, col) {
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return !(size % 2 && col === middleCol)
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};
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var mirrorColFor = function (col) {
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return size - col - 1;
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};
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var fillRectAt = function (row, col) {
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var rect = document.createElementNS(svgNS, 'rect');
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rect.setAttribute('x', (col * rectSize) + '%');
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rect.setAttribute('y', (row * rectSize) + '%');
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rect.setAttribute('width', rectSize + '%');
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rect.setAttribute('height', rectSize + '%');
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svg.appendChild(rect);
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};
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var row;
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var col;
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var middleCol;
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var rectSize;
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svg.setAttribute('class', 'identicon');
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size = size || 5;
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rectSize = 100 / size;
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middleCol = Math.ceil(size / 2) - 1;
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if (value) {
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value = value.toString().replace(/[\W_]/i, '');
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for (row = 0; row < size; ++row) {
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for (col = middleCol; col > -1; --col) {
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if (shouldFillRectAt(row, col)) {
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fillRectAt(row, col);
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if (shouldMirrorRectAt(row, col)) {
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fillRectAt(row, mirrorColFor(col));
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}
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}
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}
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}
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}
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return svg;
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}
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return {
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restrict: 'E',
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scope: {
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value: '='
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},
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link: function (scope, element, attributes) {
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element.append(new Identicon(scope.value));
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}
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}
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}]);
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