Class: Collavre::UserTheme

Inherits:
ApplicationRecord show all
Defined in:
app/models/collavre/user_theme.rb

Instance Method Summary collapse

Instance Method Details

#dark? ⇒ Boolean

Returns true if the theme has a dark background (lightness < 50%)

Returns:

  • (Boolean) 


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# File 'app/models/collavre/user_theme.rb', line 11

def dark?
  bg = variables["--surface-bg"].to_s
  return false unless bg.match?(/\A#[0-9a-fA-F]{6}\z/)

  r, g, b = bg[1..2].to_i(16), bg[3..4].to_i(16), bg[5..6].to_i(16)
  luminance = (0.299 * r + 0.587 * g + 0.114 * b) / 255.0
  luminance < 0.5
end