; The island machinery, adopted from Murzchnvok/polybar-collection.
;
; [bar/main] is one full-width, fully transparent window. An island is just a
; run of modules that paint their own background, opened and closed by these
; two text modules: a half circle drawn in the island colour at font-1
; (%{T2}). The result is a rounded block only as wide as what is inside it --
; no bar widths to measure and no second bar window to keep in sync.
;
; The corner radius is font-1's *size*, and the trick is that the glyph is far
; taller than the bar: at 30pt it is 48px tall, the bar keeps the middle 32px,
; and a shallow 6px corner is all that shows. Bigger size, flatter corner --
; the inset at the bar's top and bottom edge works out to about
;
;   0.636 * em * (1 - sqrt(1 - (16 / (0.6065 * em))^2))      em = size * 4/3
;
; The %{O-8} is what keeps the cap from being fat: the glyph's advance is
; 0.6em (24px at 30pt), far more than the corner needs, so the cursor is
; pulled back 8px to leave a 16px cap. Which side of the glyph the pullback
; goes on matters. cap-left trims after, because its ink runs to the right
; into the next module's background, which is painted afterwards and covers
; it. cap-right trims before, because its ink runs left over the *previous*
; module -- so keep that pullback under that module's format-padding (10px)
; or the cap will paint over the last of its text.
;
; The contract for anything that goes in an island: set a background and some
; padding on every format the module can show, e.g.
;
;   format-background = ${colors.background}
;   format-padding = 1
;
; A format without a background leaves a see-through hole in the island. Note
; that it is format-<name>-background for modules with named formats
; (mounted, volume, connected, ...) -- there is no fallback to a bare
; format-background.

[module/cap-left]
type = custom/text
label = %{T2}%{T-}%{O-8}
label-foreground = ${colors.background}

[module/cap-right]
type = custom/text
label = %{O-8}%{T2}%{T-}
label-foreground = ${colors.background}

; A transparent spacer, for a real gap between two islands on the same side.
; One font-1 space, so it is a cap's worth of nothing: 24px.
[module/gap]
type = custom/text
label = %{T2} %{T-}
label-foreground = ${colors.transparent}

; vim:ft=dosini