Short hex numbers in Scala sources should not be highlighted

[OndrejSpanel]

Originally described in now closed #101:

I find the current highlighting a bit too much aggressive. In some cases it highlights things which are not colors at all.

Short hex numbers in Scala sources:

    def hex(v: Int): ColorRGB = {
      val mask = 0xff
      fromBytes((v >> 16) & mask, (v >> 8) & mask, v & mask)
    }

[mallowigi]

I'm not a huge fan of adding a lot of settings. There's already quite a lot in my opinion.

But I'll leave this open, if more people are asking for this, I'll add more fine-tuning.

[OndrejSpanel]

Are people using 0xff or 0xff00 to write a color? I would use 0x0000ff or 0x00ff00 in such case.

[mallowigi]

good point...

[mallowigi]

The reason for that is that when it's a number, it actually checks which color is represented by that number. In numbers there's no such thing as length (in the same flavor as in strings). So in that case it would simply do the following math: 0xRRGGBB === (BB) + (GG) * 256 + (RR) * 256 * 256

So yeah 0xff = 255 == 0000FF therefore blue
0xff00 == f * 16^3 + f * 16^2 == 00FF00 therefore green
etc.

Bottomline: in these cases there's no avoiding that except by converting the number to a hex representation and into a string, and in all honesty a bit too much work for my taste :p

But I encourage you to dirty your own hands and find a solution by yourself if you have time. OR implement the fine-tuned setting to disable detection in octal numbers.

[OndrejSpanel]

But I encourage you to dirty your own hands

If you agree we do not want to detect ff or ff00 as color, I will try if perhaps I am able to implement this.

[mallowigi]

no, we actually have to. Because 0x0000ff and 0xff are the same. And like i was saying, there's no "length" in the concept of numbers. The only way would be to create a helper that turns a number into a 6-digits hex representation and use the hex color parser to parse this.

[OndrejSpanel]

there's no "length" in the concept of numbers.

There is no length in numbers, but there is in their text representation. If I will create a PR which will highlight 0x0000ff but not 0xff or 0x00ff, is this something you would accept?

[mallowigi]

private fun parseHex(text: String): Color =

I suppose this is the part of the code that needs tweaking

[OndrejSpanel]

Thanks for your maintenance of the plugin. ❤️

If I have any more improvements, I will bother you again, but at the moment everything works fine for me.