22. The method of claim 19 , further comprising computing a maximum width of the visible and non-visible content of the at least one of the plurality of text boxes by determining a width of each line in the file, wherein the maximum width is selected from a set comprising the width of each line.
19. The method of claim 15 , wherein detecting the plurality of text boxes with visible and non-visible content further comprises retrieving a width and a height of a bounding box of at least one of the plurality of text boxes.