D28361: KCalendarCore: fix fallback to vCalendar loading on iCalendar load failure

[Allen Winter]

winterz created this revision.
winterz added reviewers: vkrause, dvratil.
Herald added a project: KDE PIM.
Herald added a subscriber: kde-pim.
winterz requested review of this revision.

REVISION SUMMARY
  If iCalendar loading fails in ICalFormat::load() set an exception.
  
  Then look for that exception in FileStorage::load().  If set, then we know to try vCalendar loading.

TEST PLAN
  various scenarios tested.  there could be other scenarios I didn't try.
  
  at least I see vCalendars can load now.

REPOSITORY
  R172 KCalendar Core

REVISION DETAIL
  https://phabricator.kde.org/D28361

AFFECTED FILES
  src/filestorage.cpp
  src/icalformat.cpp

To: winterz, vkrause, dvratil
Cc: kde-pim, fbampaloukas, dcaliste, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
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