feat: add :tab-background for delineating inactive wrap tabs#10
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The `wrap' layout only drew a box behind the current, modified, or hovered tab; ordinary (inactive) tabs were transparent. Add a `tab-background' keyword to `svg-line-wrap-image' (and a `:tab-background' / `:inactive-tab-background' spec option threaded through `svg-line--build-wrap') that fills a box behind every other ordinary tab, so inactive tabs can be delineated like the built-in tab line. nil (the default) keeps them transparent, so existing bars are unchanged.
This was referenced Jun 26, 2026
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What
Adds a
:tab-background(and:inactive-tab-background) option to thewraplayout.Previously
svg-line-wrap-imageonly drew a box behind the current / modified / hovered tab — ordinary inactive tabs were transparent. The newtab-backgroundkeyword fills a box behind every other ordinary tab, so inactive tabs can be delineated like the built-in tab line.Backward compatibility
nilis the default (and the inactive-window variant falls back through the samepickhelper as the other colours), so any bar that doesn't set:tab-backgroundrenders exactly as before.Changes
svg-line-wrap-image: newtab-backgroundkeyword; normalised viasvg-line--color; added as the finalboxcond clause for ordinary tabs.svg-line--build-wrap: passes:tab-background/:inactive-tab-backgroundfrom the spec.svg-line-wrap-imagedocstring + thesvg-line-definewrap-only option list.