the start so I can revert back

pdfviewer.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+# this is for doing some math operations
+import math
+# this is for handling the PDF operations
+import fitz
+# importing PhotoImage from tkinter
+from tkinter import PhotoImage
+
+
+class PDFViewer:
+    def __init__(self, filepath):
+        # creating the file path
+        self.filepath = filepath
+        # opening the pdf document
+        self.pdf = fitz.open(self.filepath)
+        # loading the first page of the pdf document
+        self.first_page = self.pdf.load_page(0)
+        # getting the height and width of the first page
+        self.width, self.height = self.first_page.rect.width, self.first_page.rect.height
+        # initializing the zoom values of the page
+        zoomdict = {800:0.8, 700:0.6, 600:1.0, 500:1.0}
+        # getting the width value
+        width = int(math.floor(self.width / 100.0) * 100)
+        # zooming the page
+        self.zoom = zoomdict[width]
+    # author, name of document, number of pages
+    def get_metadata(self):
+        # getting metadata from the open PDF document
+        metadata = self.pdf.metadata
+        # getting number of pages from the open PDF document
+        numPages = self.pdf.page_count
+        # returning the metadata and the numPages
+        return metadata, numPages
+    # the function for getting the page
+    def get_page(self, page_num):
+        # loading the page
+        page = self.pdf.load_page(page_num)
+        # checking if zoom is True
+        if self.zoom:
+            # creating a Matrix whose zoom factor is self.zoom
+            mat = fitz.Matrix(self.zoom, self.zoom)
+            # gets the image of the page
+            pix = page.get_pixmap(matrix=mat)
+        # returns the image of the page
+        else:
+            pix = page.get_pixmap()
+        # a variable that holds a transparent image
+        px1 = fitz.Pixmap(pix, 0) if pix.alpha else pix
+        # converting the image to bytes
+        imgdata = px1.tobytes("ppm")
+        # returning the image data
+        return PhotoImage(data=imgdata)
+    # function to get text from the current page
+    def get_text(self, page_num):
+        # loading the page
+        page = self.pdf.load_page(page_num)
+        # getting text from the loaded page
+        text = page.getText('text')
+        # returning text
+        return text