Polish UI

src/core/Integer.test.ts

@@ -48,4 +48,10 @@ it('converts to largest size', () => {
     expect(n8.num()).toBe(-1);
     expect(n16.num()).toBe(-1);
     expect(n32.num()).toBe(-1);
-});
+});
+
+it('abs doesnt change type size', () => {
+    const result = Integer.byte(-127).abs();
+    expect(result.num()).toBe(127);
+    expect(result.maxBitSize).toBe(8);
+})

src/core/Integer.ts

@@ -47,6 +47,12 @@ export class Integer {
         return new Integer(value, 8);
     }
 
+    abs() : Integer {
+        return new Integer(
+            this.value >= 0 ? 
+                this.value : -this.value, this.maxBitSize, this.signed);
+    }
+
     isTheSame  (other : Integer) : boolean {
         return this.value == other.value && this.signed == other.signed && this.maxBitSize == other.maxBitSize;
     }

src/core/calc.test.ts

@@ -186,6 +186,18 @@ describe("calc misc", () => {
         const actual = calc.not(asInteger("8920390230576132")).toString();
         expect(actual).toBe("-8920390230576133");
     });
+
+    it('numberOfBitsDisplayed appends sign bit', () => {
+        const byte = Integer.byte(-127);
+        const int = Integer.int(-127);
+
+        expect(calc.numberOfBitsDisplayed(int)).toBe(7);
+        expect(calc.numberOfBitsDisplayed(int.abs())).toBe(7);
+
+        // If there is only sign bit left, might as well show it
+        expect(calc.numberOfBitsDisplayed(byte)).toBe(8); 
+        expect(calc.numberOfBitsDisplayed(byte.abs())).toBe(8); 
+    })
 });
 
 describe("calc.engine.", () => {

src/core/calc.ts

@@ -2,12 +2,11 @@ import { Integer, JsNumber,  asInteger } from "./Integer";
 import { asIntN, logLines } from "./utils";
 
 export default {
-    abs (num : Integer) : Integer {
+
-        return asInteger(num.value >= 0 ? num.value : -num.value);
-    },
-    
     numberOfBitsDisplayed: function (num: Integer | JsNumber) : number {
-        return this.toBinaryString(asInteger(num)).length;
+        const n = asInteger(num);
+        const len = this.toBinaryString(n).length;
+        return (len+1) == n.maxBitSize ? n.maxBitSize : len; // Include sign bit if it is all that left
     },
 
     flipBit: function(num: Integer | JsNumber, bitIndex: number): Integer  {
@@ -43,7 +42,7 @@ export default {
 
     toBinaryString(num: Integer) : string {
         const bitSize = num.maxBitSize;
-        const bin = this.abs(num).value.toString(2);
+        const bin = num.abs().value.toString(2);
         
         if(bin.length > bitSize!)
             throw new Error(`Binary represenation '${bin}' is bigger than the given bit size ${bitSize}`)

src/core/components/BinaryString.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 import './BinaryString.css';
+import loglevel from 'loglevel';
 
 export type BinaryStringViewProps = {
     allowFlipBits?: boolean;

src/core/formatter.ts

@@ -10,7 +10,7 @@ const formatter = {
 
         switch(base) {
             case 16:
-                var hexVal = calc.abs(num).value.toString(16);
+                var hexVal = num.abs().value.toString(16);
                 return num.value >= 0 ? '0x' + hexVal : '-0x' + hexVal;
             case 2:    
                 const bin = calc.toBinaryString(num);