I noticed it does not include suppressing the title. For the use case we are targeting it should also suppress the title. Or we could control the title separately. Or maybe not show it upon mouse movement unless the mouse is at the top of the screen where the title would be. Like the Mac menu bar behaves when in full screen mode.

Continue from #4553...

Is this feature implemented to solve #4553? If so, then I think it's better to make this a runtime property rather than a pref key, because the user probably only wants to disable the OSC when watching the movie. It would be a hassle if they must open the settings window to enable/disable this feature. And there's little reason to remember this setting permanently.

Is this feature implemented to solve #4553?

I probably should have filled an issue which better fit this PR...
@lhc70000 I'll respond in the comments for #4553.

As noted in #4553, I've refactored so that the setting now covers both title bar & OSC.

It's designed to co-exist with disableUI, so that in effect either setting will disable the "fadeable views" in the window. I noticed that disableUI has some quirks. For example, when disableUI is true, the OSD is still shown with a vertical offset which is influenced by the size of the top bar, so if the OSC is configured to be at "top", the OSD will be lower, like this:

I decided to use a constant vertical offset when enableTitleBarAndOSC is false which matches the title bar height instead, like this: