Jonas Jenwald bea15b6ce5 Simplify the PDFDocument.fingerprint method slightly
The way that this method handles documents without an `ID` entry in the Trailer dictionary feels overly complicated to me. Hence this patch adds `getByteRange` methods to the various Stream implementations[1], and utilize that rather than manually calling `ensureRange` when computing a fallback `fingerprint`.

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[1] Note that `PDFDocument` is only ever initialized with either a `Stream` or a `ChunkedStream`, hence why the `DecodeStream.getByteRange` method isn't implemented.
2019-07-15 13:26:08 +02:00
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2018-09-13 13:10:38 -07:00