Improve the formatting of disabled menu items in different terminals

[jackwh]

I spent ages wondering why my disabled menu item didn't look like it was disabled, and eventually I figured out it's just that some Terminals don't support some of the less common ANSI escape sequences.

In my case, I was using PhpStorm's built-in Terminal window — which is obviously going to be a pretty common choice for users of this package — so here's a PR for a workaround.

• Disabled items are now modified to use the ANSI "bright" equivalent of the same colour as their foreground text
• To get a bright ANSI colour, just add 60 to an existing colour code
• This bright effect makes both black and white text look greyed-out, and works well with other colours too
• The bright text is then wrapped in the original dim modifier, to enhance the effect further in Terminals that do support dimming

Whilst I was researching what was going wrong, I found this list comparing support for the blink effect across different popular terminals. Though it's obviously for a different effect it does go to show you can't expect every terminal to support dimming.

[AydinHassan]

hi @jackwh thanks for the PR!

Could you maybe add a screenshot so we can see how it looks?

Also looks like you need to update a test + some return types

[codecov-io]

Codecov Report

Merging #236 into master will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #236      +/-   ##
============================================
+ Coverage     92.87%   92.91%   +0.04%     
- Complexity      623      629       +6     
============================================
  Files            37       37              
  Lines          1866     1877      +11     
============================================
+ Hits           1733     1744      +11     
  Misses          133      133              

Impacted Files	Coverage Δ	Complexity Δ
src/MenuStyle.php	98.94% <100.00%> (+0.04%)	83.00 <9.00> (+6.00)

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[jackwh]

@AydinHassan Thanks, I've fixed the return types and the broken test.

Here's some screenshots — the first one is before any changes were made, and you can see there's no dim formatting on the PhpStorm window (on the right — macOS on the left). The rest are after the changes.

It's not perfect, but without a terminal supporting dimming, it's better than what was there before I think. Of course, ultimately its effectiveness will depend on the ANSI colours defined in the user's Terminal colourscheme.

Before:

After:

[AydinHassan]

Thank you @jackwh looks great to me and thanks for the accompanying screenshots, that makes it super easy for me to check and approve! I'm happy to merge after the last question regarding the test has been resolved :)

[jackwh]

Thanks, happy to contribute! It's a great package, thank you for releasing it!

[AydinHassan]

@jackwh merged and thanks for contributing!