Linux/Mac - Text is hidden in "Text Alignment and Direction" scenario

[BDisp]

Colors of the TextView and centered and justified Label are hiding the text in the "Text Alignment and Direction" scenario on Linux and Mac.

[tig]

I edited the bug title and description to make the title more terse. It is hard to process bug lists with long/wordy titles.

[BDisp]

The main problem is because of this:

var color1 = new ColorScheme { Normal = Application.Driver.MakeAttribute (Color.Black, Color.Gray) };
var color2 = new ColorScheme { Normal = Application.Driver.MakeAttribute (Color.Black, Color.DarkGray) };

Unix don't have a DarkGray but only a COLOR_CYAN. So, Gray and Dark Gray is the same color for the Unix.

[BDisp]

I made a basic color scenario and I found that there is a large bug in color management in the CursesDriver. Whenever I leave and re-enter the scenario, the colors are shown in a randomly and uncontrolled way.
Because of this I think that after all it can be possible to stop and restart the driver, as you wanted to do at the beginning @tig, and maybe not only a singleton.

[BDisp]

Another repro related with the CursesDriver color issue. While doing a tabbing (in this case with Ctrl+PageDown using my PR #1266) the masked text colors are always changed.

[tznind]

I have noticed this issue in the past (many months ago). I thought maybe it was to do with the color (Attribute) structs going out of scope and getting garbage collected (despite there being references to them). Which doesn't make much sense but it was my best guess. I think in the end I did some workaround that involved constantly redeclaring colors or declaring them at the top of my program (can't quite remember).

It does seem to take a while to kick in like you can see that it holds the (red) color for a while then looses it.

[BDisp]

I'm glad I could have fixed this annoying bug.