feat: hide_separator option for powerline; new theme: powerlevel10k_rainbow

[uruz-7]

Prerequisites

• I have read and understand the CONTRIBUTING guide
• The commit message follows the conventional commits guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Description

I wanted an option that could hide the separator between a powerline segment and others, so I could make a powerlevel10k rainbow style based on the fascinating jandedobbeleer theme.

[JanDeDobbeleer]

@uruz-7 can you give me a screenshot the result? Maybe we can go about this another way (or not).

[uruz-7]

@uruz-7 can you give me a screenshot the result? Maybe we can go about this another way (or not).

The result is like this.

What issues is that by default, a separator will be rendered between diamond and powerline 1(or 4), which I personally didn't want.

I have tried to change powerline 1 and 2 to diamond with customized color leading and trailing diamonds, but the git segment will change color, so the color of the separator between 1 and 2 must be adaptive => powerline seems to be a better choice.

Anyway, I'll appreciate it if there is a better way,.

[JanDeDobbeleer]

It looks so pretty. Let me check if we can fix this without an additional property 👍🏻

[JanDeDobbeleer]

@uruz-7 if I do the following change I get the same result by leaving either trailing or leading diamond empty:

diff --git a/src/block.go b/src/block.go
index d6f2f5c7..d6e444a0 100644
--- a/src/block.go
+++ b/src/block.go
@@ -89,9 +89,10 @@ func (b *Block) renderSegments() string {
 }

 func (b *Block) endPowerline() {
-   if b.activeSegment != nil &&
-       b.activeSegment.Style != Powerline &&
-       b.previousActiveSegment != nil &&
+   if b.previousActiveSegment == nil || b.activeSegment == nil {
+       return
+   }
+   if b.activeSegment.Style != Powerline &&
        b.previousActiveSegment.Style == Powerline {
        b.writePowerLineSeparator(b.getPowerlineColor(false), b.previousActiveSegment.background(), true)
    }
@@ -113,6 +114,12 @@ func (b *Block) getPowerlineColor(foreground bool) string {
    if b.previousActiveSegment == nil {
        return Transparent
    }
+   if b.previousActiveSegment.Style == Diamond && len(b.previousActiveSegment.TrailingDiamond) == 0 {
+       return b.previousActiveSegment.background()
+   }
+   if b.activeSegment.Style == Diamond && len(b.activeSegment.LeadingDiamond) == 0 {
+       return b.activeSegment.background()
+   }
    if !foreground && b.activeSegment.Style != Powerline {
        return Transparent
    }

[uruz-7]

Wonderful job! Let me check it!

[uruz-7]

@JanDeDobbeleer This worked perfect for my case. Thanks!

And it influenced some other themes which could be fixed easily in #700.

This PR could be closed :)

(Please just ignore my mistake in branching above.)