Rodrigo Tobar cb2cf6de99 PDFViewer: Perform standard error handling when opening files ...

The previous implementation of open_file had a lambda that was used to
inspect the call of ErrorOr-returning calls. This was a non-standard way
of doing this though, as the more usual and clearer way is to have an
inner function that returns ErrorOr, then handle any incoming errors on
the top level function.

This commit adds a try_open_file function, where all the logic occurs,
and all the failure-producing steps are simplied TRY'ed. The top level
open_file function takes that result and does what the lambda previously
did: showing a message box with the actual error.

2022-12-17 19:40:52 +01:00

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