feat: add ability to have 2 decimal floating point pen size

src/UI/pen.js

@@ -125,14 +125,26 @@ function savePoint(x, y) {
 /**
  * Set the attributes of the pen.
  *
- * @param {Number} penSize The size of the lines drawn by the pen
+ * @param {Number} penSize The size of the lines drawn by the pen, rounded to 2 decimal places
  * @param {String} penColor The color of the lines drawn by the pen
  */
 export function setPen(penSize = 1, penColor = '000000') {
-  _penSize = parseInt(penSize, 10);
+  _penSize = Math.round(parseFloat(penSize) * 1e2) / 1e2;
   _penColor = penColor;
 }
 
+/**
+ * Return pen attributes of the pen
+ *
+ * @return {Object} Object with size and color
+ */
+export function getPen() {
+  return {
+    size: _penSize,
+    color: _penColor
+  };
+}
+
 /**
  * Enable the pen behavior
  */

test/UI/pen.spec.js

@@ -1,18 +1,18 @@
-import { equal } from 'assert';
+import { equal, deepStrictEqual } from 'assert';
 import PDFJSAnnotate from '../../src/PDFJSAnnotate';
 import { firePointerEvent } from '../fireEvent';
 import mockAddAnnotation from '../mockAddAnnotation';
 import mockGetAnnotations from '../mockGetAnnotations';
 import mockSVGContainer from '../mockSVGContainer';
-import { setPen, enablePen, disablePen } from '../../src/UI/pen';
+import { setPen, getPen, enablePen, disablePen } from '../../src/UI/pen';
 
 let svg;
 let addAnnotationSpy;
 let __addAnnotation = PDFJSAnnotate.__storeAdapter.addAnnotation;
 let __getAnnotations = PDFJSAnnotate.__storeAdapter.getAnnotations;
 
-function simulateCreateDrawingAnnotation(penSize, penColor) {
-  setPen(penSize, penColor);
+function simulateCreateDrawingAnnotation() {
+  setPen();
 
   firePointerEvent(svg, 'pointerdown', {
     clientX: 10,
@@ -90,4 +90,19 @@ describe('UI::pen', function() {
       done();
     }, 0);
   });
+
+  it('allow floating point pen size', () => {
+    setPen(0.1);
+    deepStrictEqual(getPen(), {size: 0.1, color: '000000'});
+  });
+
+  it('round floating point pen size to 2 decimal points', () => {
+    setPen(0.123456);
+    deepStrictEqual(getPen(), {size: 0.12, color: '000000'});
+  });
+
+  it('parseFloat run on penSize', () => {
+    setPen('0.12');
+    deepStrictEqual(getPen(), {size: 0.12, color: '000000'});
+  });
 });