Review Request 129791: Avoid duplicates in the available backends list

[Antonio Rojas]

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https://git.reviewboard.kde.org/r/129791/
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Review request for Okular and Albert Astals Cid.


Bugs: 374650
    http://bugs.kde.org/show_bug.cgi?id=374650


Repository: okular


Description
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If a generator can open two mime types that match the same file, okular will show a selection dialog containing two copies of the same generator when opening that file. This patch avoids having duplicates in the backend list.


Diffs
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  core/document.cpp 19526627 

Diff: https://git.reviewboard.kde.org/r/129791/diff/


Testing
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Tried opening a PDF, okular opens it directly. Before this patch, if the "Show backend selection dialog" option was enabled, it would show a backend selection dialog with two copies od the poppler generator.


Thanks,

Antonio Rojas

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