Class: PRRD::Color

Inherits:
Object
  • Object
show all
Defined in:
lib/prrd.rb

Overview

Color class

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, tint = nil, alpha = nil) ⇒ Color

Constructor

Parameters:

  • name (Symbol)
  • tint (Symbol, nil) (defaults to: nil)
  • alpha (Symbol, nil) (defaults to: nil) 


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# File 'lib/prrd.rb', line 61

def initialize(name, tint = nil, alpha = nil)
  if name.is_a?(String) && name.include?('#')
    @hexcode = name
  else
    @hexcode = to_hex(name, tint, alpha)
  end
end

Instance Attribute Details

#collection ⇒ Object

Accessors



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# File 'lib/prrd.rb', line 55

def collection
  @collection
end

#hexcode ⇒ Object

Accessors



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# File 'lib/prrd.rb', line 55

def hexcode
  @hexcode
end

Instance Method Details

#darken(percentage) ⇒ String

Darken the color

Parameters:

  • percentage (Integer)

Returns:

  • (String) 


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# File 'lib/prrd.rb', line 99

def darken(percentage)
  fail 'Can not operate on a non-hexadecimal color' if @hexcode.nil?

  hexcode = @hexcode.gsub('#', '')
  percentage = percentage.to_f / 100
  rgb = hexcode.scan(/../).map { |c| c.hex }
  rgb.map! { |c| (c.to_i * percentage).round }

  "#%02x%02x%02x" % rgb
end

#lighten(percentage) ⇒ Object

Lighten the color

Parameters:

  • percentage (Integer) 


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# File 'lib/prrd.rb', line 112

def lighten(percentage)
  fail 'Can not operate on a non-hexadecimal color' if @hexcode.nil?

  hexcode = @hexcode.gsub('#', '')
  percentage = percentage.to_f / 100
  rgb = hexcode.scan(/../).map { |c| c.hex }
  rgb.map! { |c| [(c.to_i + 255 * percentage).round, 255].min }

  "#%02x%02x%02x" % rgb
end

#to_hex(name, tint = nil, alpha = nil) ⇒ Object

Translate into hexcode

Parameters:

  • name (Symbol)
  • tint (Symbol, nil) (defaults to: nil)
  • alpha (Symbol, nil) (defaults to: nil)
  • (String) 


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# File 'lib/prrd.rb', line 74

def to_hex(name, tint = nil, alpha = nil)
  if @collection.nil?
    @collection = {
      red: {light: '#EA644A', dark: '#CC3118'},
      orange: {light: '#EC9D48', dark: '#CC7016'},
      yellow: {light: '#ECD748', dark: '#C9B215'},
      green: {light: '#54EC48', dark: '#24BC14'},
      blue: {light: '#48C4EC', dark: '#1598C3'},
      pink: {light: '#DE48EC', dark: '#B415C7'},
      purple: {light: '#7648EC', dark: '#4D18E4'}
    }
  end

  name = name.to_sym
  tint = tint.nil? ? :light : tint.to_sym

  fail "Unknown color #{name}" unless @collection.key? name
  fail "Unknown tint #{tint}" unless @collection[name].key? tint

  alpha.nil? ? @collection[name][tint] : @collection[name][tint] + alpha
end

#to_s ⇒ Object

String representation



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# File 'lib/prrd.rb', line 124

def to_s
  @hexcode
end