Review Request: Add support for single Runner queries to krunner (part I: libplasma)

[Jacopo De Simoi]

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http://reviewboard.kde.org/r/2090/
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Review request for Plasma, Aaron Seigo and Ryan Bitanga.


Summary
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This is the API needed by the new single Runner mode for krunner (more on usecases in part II:krunner) for kdelibs;

A runner can now optionally define a Default syntax; if this is the case, the runner will be exposed as single-runner-mode capable. 
On request, the default syntax will be replaced to the empty query in RunnerManager::launchQuery.

The context is aware of the fact that we are in single runner query mode in case the runners need to change their behaviour accordingly (e.g. to _not_ discard queries with less than 3 chars)


Diffs
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  trunk/KDE/kdelibs/plasma/abstractrunner.h 1045930 
  trunk/KDE/kdelibs/plasma/abstractrunner.cpp 1045930 
  trunk/KDE/kdelibs/plasma/runnercontext.h 1045930 
  trunk/KDE/kdelibs/plasma/runnercontext.cpp 1045930 
  trunk/KDE/kdelibs/plasma/runnermanager.h 1045930 
  trunk/KDE/kdelibs/plasma/runnermanager.cpp 1045930 

Diff: http://reviewboard.kde.org/r/2090/diff


Testing
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Thanks,

Jacopo