D12556: Do not paint long pre-edit text outside display

[Mariusz Glebocki]

mglb created this revision.
mglb added a reviewer: Konsole.
mglb added a project: Konsole.
mglb requested review of this revision.

REVISION SUMMARY
  F5822474: ime-fix.png <https://phabricator.kde.org/F5822474>

TEST PLAN
  - Turn on IME (tested with ibus+anthy)
  - Type (without accepting) long text using IME
  
  Expected result: text should not be drawn outside terminal
  Actual result: text is drawn on terminal, margins, scrollbar

BRANCH
  wip/cursor-fixes/0005-Do-not-paint-long-pre-edit-text-outside-display (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D12556

AFFECTED FILES
  src/TerminalDisplay.cpp

To: mglb, #konsole
Cc: #konsole, herrold, ngraham, hindenburg
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