Review Request 110043: Proposed fix/workaround for legacy encoded filename handling

[Róbert Szókovács]

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The solution is intentionally "shy", I really don't want to fan the flames surrounding this issue. I just stumbled upon this location when it can be handled painlessly. Whether or not it should be turned on by default, in my opinion, can be left for distributors.

- Róbert Szókovács


On May 7, 2013, 10:04 a.m., Róbert Szókovács wrote:
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> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/110043/
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> (Updated May 7, 2013, 10:04 a.m.)
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> Review request for kdelibs and Thiago Macieira.
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> Description
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> This patch works around the problem of filenames that are not valid UTF8 strings:  in KLocalePrivate::initFileNameEncoding() KDE sets the QFile's encoding/decoding function, to to/fromUTF8() in QString, which in turn calls QUtf8's converter function (QUtf8 is not exported to developers, so I had to use an inefficient method, I think it would be better if we could use the state parameter for error detection). I replaced this with the said functions' copy/pasted version and changed it, so when it encounters an invalid UTF8 string, it will encode it byte by byte, mapping the lower 128 their normal unicode place and the upper 128 to U+18000-U+1807F, and of course the decoder reverses it. 
> To make this actually work you have to define the KDE_UTF8_FILENAMES enviroment variable to a specific value ("broken_names").
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> To test it, do the following: .kde/env/KDE_UTF8_FILENAMES.sh with this content: 
> export KDE_UTF8_FILENAMES=broken_names
> logout, login, try dolphin on faulty files. (instead of the usual boxed "?" you'll see just boxes)
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> This addresses bug 165044.
>     http://bugs.kde.org/show_bug.cgi?id=165044
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> Diffs
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>   kdecore/localization/klocale_kde.cpp b010e74 
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> Diff: http://git.reviewboard.kde.org/r/110043/diff/
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> Testing
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> Thanks,
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> Róbert Szókovács
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