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Code Issues Projects Releases Packages Wiki Activity Actions 8

Use less contrasting color for powerline alt separator

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This change makes it so that when using powerline-style tab bars, and
if the `tab_bar_background`, `inactive_tab_background` and
`inactive_tab_foreground` are all different, the separator between
inactive tabs uses the less contrasting color between the inactive
foreground, and the tab bar background.

This fixes #3664.
This commit is contained in:
John R. Lenton 2021-05-29 16:54:51 +01:00
parent 39b3d3de0f
commit 97181a39da
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GPG key ID: 7A062ACAAAA170C2
2 changed files with 19 additions and 0 deletions
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10
kitty/rgb.py generated
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@ -12,6 +12,16 @@ class Color(NamedTuple):
green: int
blue: int
def luminance(self) -> float:
return 0.299 * self.red + 0.587 * self.green + 0.114 * self.blue
def contrast(self, other: 'Color') -> float:
a = self.luminance()
b = other.luminance()
if a < b:
a, b = b, a
return (a + 0.05) / (b + 0.05)
def alpha_blend_channel(top_color: int, bottom_color: int, alpha: float) -> int:
return int(alpha * top_color + (1 - alpha) * bottom_color)

9
kitty/tab_bar.py
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@ -234,6 +234,15 @@ def draw_tab_with_powerline(draw_data: DrawData, screen: Screen, tab: TabBarData
screen.cursor.bg = inactive_bg
screen.draw(separator_symbol)
else:
if tab_bg == default_bg:
pass
elif tab_bg == tab_fg:
screen.cursor.fg = default_bg
else:
c1 = draw_data.inactive_bg.contrast(draw_data.default_bg)
c2 = draw_data.inactive_bg.contrast(draw_data.inactive_fg)
if c1 < c2:
screen.cursor.fg = default_bg
screen.draw(f' {separator_alt_symbol}')
end = screen.cursor.x