Current Dev State

static/js/ketcher2/node_modules/rgb2hex/rgb2hex.js

@@ -0,0 +1,58 @@
+;(function(window) {
+
+    var rgb2hex = function(color) {
+
+        if(typeof color !== 'string') {
+            // throw error of input isn't typeof string
+            throw new Error('color has to be type of `string`');
+        } else if (color.substr(0, 1) === '#') {
+            // or return if already rgb color
+            return {
+                hex: color,
+                alpha: 1
+            };
+        }
+
+        // parse input
+        var digits = /(.*?)rgb(a)*\((\d+),(\d+),(\d+)(,[0-9]*\.*[0-9]+)*\)/.exec(color.replace(/\s+/g,''));
+
+        if(!digits) {
+            // or throw error if input isn't a valid rgb(a) color
+            throw new Error('given color (' + color + ') isn\'t a valid rgb or rgba color');
+        }
+
+        var red = parseInt(digits[3]);
+        var green = parseInt(digits[4]);
+        var blue = parseInt(digits[5]);
+        var alpha = digits[6] ? /([0-9\.]+)/.exec(digits[6])[0] : '1';
+        var rgb = ((blue | green << 8 | red << 16) | 1 << 24).toString(16).slice(1);
+
+        // parse alpha value into float
+        if(alpha.substr(0,1) === '.') {
+            alpha = parseFloat('0' + alpha, 10);
+        }
+
+        // limit alpha value to 1
+        if(alpha > 1) {
+            alpha = 1;
+        }
+
+        // cut alpha value after 2 digits after comma
+        alpha = parseFloat(Math.round(alpha * 100), 10) / 100;
+
+        return {
+            hex: digits[1] + '#' + rgb.toString(16),
+            alpha: alpha
+        }
+
+    };
+
+    if(typeof define === 'function' && define.amd) {
+        define('rgb2hex', function () {
+            return rgb2hex;
+        });
+    } else {
+        window.rgb2hex = rgb2hex;
+    }
+
+}(window));