D12373: Klipper: Remove first history item on clipboard clear

[Robert Hoffmann]

hoffmannrobert created this revision.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
hoffmannrobert requested review of this revision.

REVISION SUMMARY
  Password manager tools like Keepassx offer an option to clear
  the clipboard/selection after some time, e.g. 10 seconds,
  after the password was copied to the clipboard. This works fine,
  but unfortunately the password isn't removed from Klipper's
  history. This is a great security risk, which may make the use
  of password managers impossible.
  
  This patch offers an option to remove the top history item if
  Klipper::checkClipData was called, but actually there isn't any
  data. This is the case, if QClipboard::clear was called (by
  Keepassx), which does setMimeData(0, mode).

REPOSITORY
  R120 Plasma Workspace

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D12373

AFFECTED FILES
  klipper/generalconfig.ui
  klipper/klipper.cpp
  klipper/klipper.h
  klipper/klipper.kcfg

To: hoffmannrobert
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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