834573: updated comments

Author: SF4524LogeshKumar

How to/Library Bounds to Viewer Bounds/src/app/app.component.ts

@@ -55,6 +55,7 @@ export class AppComponent implements OnInit {
     console.log(viewer.textSearch.findText(['pdf', 'adobe'], false, 7));
   }
 
+  // Event for AJAX request success
   handleAjaxRequestSuccess(args: any) {
     if (args.action === 'Load') {
       const objLength = Object.keys(args.data.pageSizes).length;
@@ -65,17 +66,24 @@ export class AppComponent implements OnInit {
     }
   }
 
+  // Event for export success
   handleExportSuccess(args: any) {
     const blobURL = args.exportData;
+    // Converting the exported blob into object
     this.convertBlobURLToObject(blobURL)
       .then(objectData => {
         console.log(objectData);
         const shapeAnnotationData = objectData.pdfAnnotation[0].shapeAnnotation;
         shapeAnnotationData.forEach((data:any) => {
           if (data && data.rect && parseInt(data.rect.width)) {
             const pageHeight = this.pageSizes[parseInt(data.page)].Height;
+
+            // Converting PDF Library values into PDF Viewer values.
             const rect = {
               x: (parseInt(data.rect.x) * 96) / 72,
+
+              // Converting pageHeight from pixels(PDF Viewer) to points(PDF Library) for accurate positioning
+              // The conversion factor of 72/96 is used to change pixel values to points
               y: (parseInt(pageHeight) * 72 / 96 - parseInt(data.rect.height)) * 96 / 72,
               width: (parseInt(data.rect.width) - parseInt(data.rect.x)) * 96 / 72,
               height: (parseInt(data.rect.height) - parseInt(data.rect.y)) * 96 / 72,
@@ -91,6 +99,7 @@ export class AppComponent implements OnInit {
       });
   }
 
+  // Function to convert Blob URL to object
   convertBlobURLToObject(blobURL: string): Promise<any> {
     return fetch(blobURL)
       .then(response => response.blob())