Review Request: Fix KRunner's 'spell in foreign language' feature

[Simeon Bird]

> On Oct. 11, 2012, 12:01 a.m., Simeon Bird wrote:
> > Does anyone have any objections? Given that the current behaviour is 'crash krunner when invoked' I feel I can't do much damage with this...

Ok, it seems no-one has any objections (or indeed any interest). So pending any comments, I'll commit the changes this weekend! 
So, please, if you have anything to say about it, now is a good time.


- Simeon


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On Sept. 21, 2012, 1:51 p.m., Simeon Bird wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/106244/
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> 
> (Updated Sept. 21, 2012, 1:51 p.m.)
> 
> 
> Review request for Plasma, Sebastian Kügler and Matthias Fuchs.
> 
> 
> Description
> -------
> 
> Krunner's spellcheck plugin has been broken since bd291d21f096a714a171e7af3a534ba345ca5659 (about two years ago) because it called Sonnet::Speller::setLanguage every time the spellchecker was invoked, which was not thread-safe. 
> This diff fixes the segfaults, and the feature, which I understand to be, basically, the ability to type 'spell french bonjour' and have it check the spelling.
> 
> The current code simply calls setLanguage on the second term in the search query, and then checks whether the resulting dictionary object is valid. The spell-checker expects languages like 'fr_FR' or 'French (France)' which the user was unlikely to type in correctly (at least, I never figured it out until I read the source). 
> 
> Instead, this patch create a new spell-check object (the creation is guarded by a mutex) when a new language is used (thus never needing to call setLanguage). Future queries use the already created speller for the new language, and spellers are deleted on the teardown() signal. 
> 
> We make a map between the speller codes and simple natural language language names in init(); this is a little bit tricky, because languages have sub-variants. My approach was to try and find the main language of the group: so 'french' gets you fr_FR.  For english I defaulted to US english. 
> 
> I have not tested this spelling an asian language as I don't speak one.
> 
> I have not implemented 'spell canadian french' or similar. If you want a specific sublanguage you have to type in the language code directly.
> 
> 
> This addresses bugs 264779 and 303831.
>     http://bugs.kde.org/show_bug.cgi?id=264779
>     http://bugs.kde.org/show_bug.cgi?id=303831
> 
> 
> Diffs
> -----
> 
>   runners/spellchecker/spellcheck.h 492c370 
>   runners/spellchecker/spellcheck.cpp 672732d 
> 
> Diff: http://git.reviewboard.kde.org/r/106244/diff/
> 
> 
> Testing
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> 
> Compiled, installed, ran for a week and spell-checked a bunch of things in European languages.
> 
> 
> Thanks,
> 
> Simeon Bird
> 
>

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