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Provide the wasReconstructed value to the caller

Mahmoud Khalil requested to merge mkhalil/poppler:wip/mkhalil/provide-wasReconstructed-value-to-caller into master

This MR modifies poppler's PDFDoc class to provide a method to check whether the xref table has been reconstructed or not indicating that the file might be broken. For the poppler library itself:

  • Refactored the wasReconstructed variable inside PDFDoc::setup() to be an instance variable of the PDFDoc
  • Created a getter method for it

For poppler-qt5:

  • Created a wrapper method inside the Document class, in which we just call the loaded PDFDoc instance checkIfReconstructed method

For qt5 demos:

  • Show a message box indicating that the PDF might be broken if we detected it using the added method in poppler-qt5

I tried testing the implementation using a sample PDF file where I just added some bytes to the content of the file and it detected that it may be broken. However, when I tried modifying the addresses of the objects in the xref table of the file, it didn't detect that the xref has been reconstructed when we're fetching the objects in the fetch() method.

@aacid

FIXES #416 (closed)

Edited by Mahmoud Khalil

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