refactor: Clean code

Author: NicolasBourdin88

app/src/main/java/com/infomaniak/drive/ui/BasePreviewSliderFragment.kt

@@ -125,25 +125,25 @@ abstract class BasePreviewSliderFragment : Fragment(), FileInfoActionsView.OnIte
 
             registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
                 override fun onPageSelected(position: Int) {
-                    val fragment = childFragmentManager.findFragmentByTag("f${previewSliderAdapter.getItemId(position)}")
-                    fragment?.trackScreen()
-
                     currentFile = previewSliderAdapter.getFile(position)
                     previewSliderViewModel.currentPreview = currentFile
+
+                    var shouldDisplayPageNumber = false
+
+                    childFragmentManager.findFragmentByTag("f${previewSliderAdapter.getItemId(position)}")?.apply {
+                        this.trackScreen()
+                        shouldDisplayPageNumber = if (this is PreviewPDFFragment) this.tryToUpdatePageCount() else false
+                    }
+
                     with(header) {
                         toggleEditVisibility(isVisible = currentFile.isOnlyOfficePreview())
                         toggleOpenWithVisibility(isVisible = !isPublicShare && !currentFile.isOnlyOfficePreview())
+                        setPageNumberVisibility(isVisible = shouldDisplayPageNumber)
+                        setPrintButtonVisibility(isGone = !currentFile.isPDF())
                     }
 
-                    setPrintButtonVisibility(isGone = !currentFile.isPDF())
                     (bottomSheetView as? FileInfoActionsView)?.openWith?.isGone = isPublicShare
                     updateBottomSheetWithCurrentFile()
-
-                    (fragment as? PreviewPDFFragment)?.let {
-                        binding.header.setPageNumberVisibility(it.tryToUpdatePageCount())
-                    } ?: run {
-                        binding.header.setPageNumberVisibility(false)
-                    }
                 }
             })
         }

app/src/main/java/com/infomaniak/drive/ui/fileList/preview/PreviewPDFFragment.kt

@@ -179,15 +179,17 @@ class PreviewPDFFragment : PreviewFragment(), PDFPrintListener {
                             // We can arrive here with a file different from a real PDF like OpenOffice documents
                             val canPrintFile = externalFileUri != null || file.extensionType == ExtensionType.PDF.value
                             shouldHidePrintOption(isGone = !canPrintFile)
-                            totalPageCount = pageCount
-                            currentPageIndex = 1
 
                             dismissPasswordDialog()
                             updatePageNumber(totalPage = pageCount)
+
                             pdfViewPrintListener = this@PreviewPDFFragment
 
-                            setPageNumberChipVisibility(true)
                             binding.downloadLayout.root.isGone = true
+
+                            totalPageCount = pageCount
+                            currentPageIndex = 1
+                            setPageNumberChipVisibility(true)
                         }
                         onPageChange { currentPage, pageCount ->
                             currentPageIndex = currentPage