Class: TuiTui::Theme

Inherits:
Data
  • Object
show all
Defined in:
lib/tui_tui/theme.rb,
lib/tui_tui/theme.rb,
lib/tui_tui/theme.rb

Overview

Semantic Style roles shared by the built-in widgets. Themes combine a background surface with an accent hue.

Constant Summary collapse

SURFACES =

Background-dependent neutral roles.

{
  dark: {
    text: Style.new,
    muted: Style.new(fg: 245),
    bar: Style.new(fg: 252, bg: 238),
    selection_dim: Style.new(fg: 247, bg: 238)
  },
  light: {
    text: Style.new,
    muted: Style.new(fg: 240),
    bar: Style.new(fg: 16, bg: 252),
    selection_dim: Style.new(fg: 240, bg: 252)
  }
}.freeze
ACCENTS =

Accent roles per hue and background.

{
  cool: {
    dark: {line: 66, title: 109, accent: 73, sel: [231, 60]},
    light: {line: 30, title: 25, accent: 30, sel: [16, 152]}
  },
  warm: {
    dark: {line: 95, title: 137, accent: 173, sel: [231, 95]},
    light: {line: 95, title: 94, accent: 130, sel: [16, 180]}
  },
  mono: {
    dark: {line: 240, title: 252, accent: 252, sel: [16, 250]},
    light: {line: 240, title: 236, accent: 236, sel: [16, 250]}
  }
}.freeze
LIGHT_FGBG =

COLORFGBG background values meaning “light”.

%w[7 15].freeze
TABLE =

Shared palettes for every surface/hue pair.

SURFACES.keys.product(ACCENTS.keys).to_h { |bg, hue| [[bg, hue], compose(bg, hue)] }.freeze
DARK = 
Theme.build(background: :dark, hue: :cool)
LIGHT = 
Theme.build(background: :light, hue: :cool)
DEFAULT = 
Theme::DARK
WARM = 
Theme.build(background: :dark, hue: :warm)
MONO = 
Theme.build(background: :dark, hue: :mono)
PRESETS = 
{
  default: DEFAULT,
  cool: DEFAULT,
  dark: DARK,
  light: LIGHT,
  warm: WARM,
  mono: MONO
}.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Attribute Details

#accent ⇒ Object (readonly)

Returns the value of attribute accent

Returns:

  • (Object) —

    the current value of accent



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# File 'lib/tui_tui/theme.rb', line 8

def accent
  @accent
end

#bar ⇒ Object (readonly)

Returns the value of attribute bar

Returns:

  • (Object) —

    the current value of bar



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# File 'lib/tui_tui/theme.rb', line 8

def bar
  @bar
end

#cursor ⇒ Object (readonly)

Returns the value of attribute cursor

Returns:

  • (Object) —

    the current value of cursor



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# File 'lib/tui_tui/theme.rb', line 8

def cursor
  @cursor
end

#frame ⇒ Object (readonly)

Returns the value of attribute frame

Returns:

  • (Object) —

    the current value of frame



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# File 'lib/tui_tui/theme.rb', line 8

def frame
  @frame
end

#muted ⇒ Object (readonly)

Returns the value of attribute muted

Returns:

  • (Object) —

    the current value of muted



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# File 'lib/tui_tui/theme.rb', line 8

def muted
  @muted
end

#scroll_thumb ⇒ Object (readonly)

Returns the value of attribute scroll_thumb

Returns:

  • (Object) —

    the current value of scroll_thumb



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# File 'lib/tui_tui/theme.rb', line 8

def scroll_thumb
  @scroll_thumb
end

#scroll_track ⇒ Object (readonly)

Returns the value of attribute scroll_track

Returns:

  • (Object) —

    the current value of scroll_track



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# File 'lib/tui_tui/theme.rb', line 8

def scroll_track
  @scroll_track
end

#selection ⇒ Object (readonly)

Returns the value of attribute selection

Returns:

  • (Object) —

    the current value of selection



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# File 'lib/tui_tui/theme.rb', line 8

def selection
  @selection
end

#selection_dim ⇒ Object (readonly)

Returns the value of attribute selection_dim

Returns:

  • (Object) —

    the current value of selection_dim



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# File 'lib/tui_tui/theme.rb', line 8

def selection_dim
  @selection_dim
end

#text ⇒ Object (readonly)

Returns the value of attribute text

Returns:

  • (Object) —

    the current value of text



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# File 'lib/tui_tui/theme.rb', line 8

def text
  @text
end

#title ⇒ Object (readonly)

Returns the value of attribute title

Returns:

  • (Object) —

    the current value of title



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# File 'lib/tui_tui/theme.rb', line 8

def title
  @title
end

Class Method Details

.auto(hue: :cool, env: ENV) ⇒ Object

The hue palette tuned for the detected background.



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# File 'lib/tui_tui/theme.rb', line 105

def self.auto(hue: :cool, env: ENV) = build(background: detect_background(env: env), hue: hue)

.bold(fg) ⇒ Object 



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# File 'lib/tui_tui/theme.rb', line 64

def self.bold(fg) = Style.new(fg: fg, attrs: [:bold])

.build(background: :dark, hue: :cool) ⇒ Object 



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# File 'lib/tui_tui/theme.rb', line 89

def self.build(background: :dark, hue: :cool) = TABLE.fetch([background, hue])

.compose(background, hue) ⇒ Object

Build the palette for a (background, hue) pair.



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# File 'lib/tui_tui/theme.rb', line 67

def self.compose(background, hue)
  surface = SURFACES.fetch(background)
  a = ACCENTS.fetch(hue).fetch(background)
  selection = Style.new(fg: a[:sel][0], bg: a[:sel][1])
  new(
    frame: Style.new(fg: a[:line]),
    title: bold(a[:title]),
    text: surface[:text],
    muted: surface[:muted],
    accent: bold(a[:accent]),
    selection: selection,
    selection_dim: surface[:selection_dim],
    bar: surface[:bar],
    cursor: selection,
    scroll_track: Style.new(fg: a[:line]),
    scroll_thumb: Style.new(bg: a[:sel][1])
  )
end

.detect_background(env: ENV) ⇒ Object

Best-effort terminal background (:light/:dark).



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# File 'lib/tui_tui/theme.rb', line 92

def self.detect_background(env: ENV)
  case env["TUITUI_BACKGROUND"]&.downcase
  when "light"
    :light
  when "dark"
    :dark
  else
    bg = env["COLORFGBG"]&.split(";")&.last
    bg && LIGHT_FGBG.include?(bg) ? :light : :dark
  end
end

.named(name) ⇒ Object

Fetch a preset by name (Symbol/String); unknown names fall back to DEFAULT.



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# File 'lib/tui_tui/theme.rb', line 108

def self.named(name) = PRESETS.fetch(name&.to_sym, DEFAULT)