UETOOL-129 - Investigate SOutputLog performance degradation
FTextLayout::AddLine was causing a re-flow of the entire document when a new line was added. This change makes it only flow the line that is being added (providing the rest of the layout is already up-to-date).
ReviewedBy Justin.Sargent
[CL 2363200 by Jamie Dale in Main branch]
This was causing the focus to ultimately switch back to the widget that was already focused, however it was also causing IMEs to lose their current context. This force focus isn't needed, as the suggestions list is already set to not take focus when it's spawned.
[CL 2350270 by Jamie Dale in Main branch]
FOutputLogTextLayoutMarshaller::GetText wasn't implemented, so it was always returning an empty string. I've implemented this and verified that it doesn't cause any performance issues for the output log.
I had to change SMultiLineEditableText::LoadText to only do that when it was bound to a delegate, as that was causing a hitch while the output log was updated when you gave it focus.
I also fixed giving the output log focus sometimes jumping to the top of the log (SMultiLineEditableText::OnKeyboardFocusReceived needed the same fix as SMultiLineEditableText::OnKeyboardFocusLost to prevent the cursor jumping into focus).
ReviewedBy Justin.Sargent
[CL 2308259 by Jamie Dale in Main branch]
It wasn't actually needed as we're able to perform the scroll immediately in all cases we need to, rather than wait until the next Tick().
#codereview Max.Preussner
[CL 2306688 by Jamie Dale in Main branch]
1) The selected text colour is now easier on the eyes
2) The output log will always scroll to the end when you enter a command
3) The output log will now correctly scroll to the bottom when it is first opened (it forces the scrollbars to always visible to avoid the horizontal scrollbar being able to move the vertical scrollbar up slightly from the bottom of the log)
ReviewedBy Andrew.Rodham
[CL 2305438 by Jamie Dale in Main branch]
This is using a custom text marshaller to efficiently convert an FLogMessage into something understood by the FTextLayout.
ReviewedBy Justin.Sargent
[CL 2297960 by Jamie Dale in Main branch]
