D29571: [Kickoff] Add emacs/bash style keybindings

[Mariusz Libera]

mlibera created this revision.
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REVISION SUMMARY
  Users used to emacs/bash style of navigation and editing might appreciate a basic support for it in Kickoff, especially Ctrl+n/p for next/previous entry.

TEST PLAN
  Check if the keys work as expected, i.e.:
  Ctrl+n - cursor key down, highlight next item in the list
  Ctrl+p - cursor key up, highlight previous item in the list
  Ctrl+h - backspace, removes last character in the search field
  Ctrl+e - end key, move cursor to the end of the search field text
  Ctrl+f - cursor key right, move cursor one character right in the search field
  Ctrl+b - cursor key left, move cursor one character left in the search field
  Ctrl+[ - esc, here the code in the patch copies Kickoff's handling of Esc key, that seems to always result in closing Kickoff despite an if condition

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D29571

AFFECTED FILES
  applets/kickoff/package/contents/ui/FullRepresentation.qml

To: mlibera
Cc: plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, ragreen, ZrenBot, ngraham, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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