first mockup in go

static/bower_components/jvectormap/lib/numeric-scale.js

@@ -0,0 +1,147 @@
+jvm.NumericScale = function(scale, normalizeFunction, minValue, maxValue) {
+  this.scale = [];
+
+  normalizeFunction = normalizeFunction || 'linear';
+
+  if (scale) this.setScale(scale);
+  if (normalizeFunction) this.setNormalizeFunction(normalizeFunction);
+  if (minValue) this.setMin(minValue);
+  if (maxValue) this.setMax(maxValue);
+};
+
+jvm.NumericScale.prototype = {
+  setMin: function(min) {
+    this.clearMinValue = min;
+    if (typeof this.normalize === 'function') {
+      this.minValue = this.normalize(min);
+    } else {
+      this.minValue = min;
+    }
+  },
+
+  setMax: function(max) {
+    this.clearMaxValue = max;
+    if (typeof this.normalize === 'function') {
+      this.maxValue = this.normalize(max);
+    } else {
+      this.maxValue = max;
+    }
+  },
+
+  setScale: function(scale) {
+    var i;
+
+    for (i = 0; i < scale.length; i++) {
+      this.scale[i] = [scale[i]];
+    }
+  },
+
+  setNormalizeFunction: function(f) {
+    if (f === 'polynomial') {
+      this.normalize = function(value) {
+        return Math.pow(value, 0.2);
+      }
+    } else if (f === 'linear') {
+      delete this.normalize;
+    } else {
+      this.normalize = f;
+    }
+    this.setMin(this.clearMinValue);
+    this.setMax(this.clearMaxValue);
+  },
+
+  getValue: function(value) {
+    var lengthes = [],
+        fullLength = 0,
+        l,
+        i = 0,
+        c;
+
+    if (typeof this.normalize === 'function') {
+      value = this.normalize(value);
+    }
+    for (i = 0; i < this.scale.length-1; i++) {
+      l = this.vectorLength(this.vectorSubtract(this.scale[i+1], this.scale[i]));
+      lengthes.push(l);
+      fullLength += l;
+    }
+
+    c = (this.maxValue - this.minValue) / fullLength;
+    for (i=0; i<lengthes.length; i++) {
+      lengthes[i] *= c;
+    }
+
+    i = 0;
+    value -= this.minValue;
+    while (value - lengthes[i] >= 0) {
+      value -= lengthes[i];
+      i++;
+    }
+
+    if (i == this.scale.length - 1) {
+      value = this.vectorToNum(this.scale[i])
+    } else {
+      value = (
+        this.vectorToNum(
+          this.vectorAdd(this.scale[i],
+            this.vectorMult(
+              this.vectorSubtract(this.scale[i+1], this.scale[i]),
+              (value) / (lengthes[i])
+            )
+          )
+        )
+      );
+    }
+
+    return value;
+  },
+
+  vectorToNum: function(vector) {
+    var num = 0,
+        i;
+
+    for (i = 0; i < vector.length; i++) {
+      num += Math.round(vector[i])*Math.pow(256, vector.length-i-1);
+    }
+    return num;
+  },
+
+  vectorSubtract: function(vector1, vector2) {
+    var vector = [],
+        i;
+
+    for (i = 0; i < vector1.length; i++) {
+      vector[i] = vector1[i] - vector2[i];
+    }
+    return vector;
+  },
+
+  vectorAdd: function(vector1, vector2) {
+    var vector = [],
+        i;
+
+    for (i = 0; i < vector1.length; i++) {
+      vector[i] = vector1[i] + vector2[i];
+    }
+    return vector;
+  },
+
+  vectorMult: function(vector, num) {
+    var result = [],
+        i;
+
+    for (i = 0; i < vector.length; i++) {
+      result[i] = vector[i] * num;
+    }
+    return result;
+  },
+
+  vectorLength: function(vector) {
+    var result = 0,
+        i;
+    for (i = 0; i < vector.length; i++) {
+      result += vector[i] * vector[i];
+    }
+    return Math.sqrt(result);
+  }
+};