Class: TTY2::Prompt::EnumList Private

Inherits:
Object
  • Object
show all
Defined in:
lib/tty2/prompt/enum_list.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

A class reponsible for rendering enumerated list menu. Used by TTY2::Prompt to display static choice menu.

Constant Summary collapse

PAGE_HELP =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"(Press tab/right or left to reveal more choices)"
INTEGER_MATCHER =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

Checks type of default parameter to be integer

/\A[-+]?\d+\Z/.freeze

Instance Method Summary collapse

Constructor Details

#initialize(prompt, **options) ⇒ EnumList

Create instance of EnumList menu.



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# File 'lib/tty2/prompt/enum_list.rb', line 24

def initialize(prompt, **options)
  @prompt       = prompt
  @prefix       = options.fetch(:prefix) { @prompt.prefix }
  @enum         = options.fetch(:enum) { ")" }
  @default      = options.fetch(:default, nil)
  @active_color = options.fetch(:active_color) { @prompt.active_color }
  @help_color   = options.fetch(:help_color)   { @prompt.help_color }
  @error_color  = options.fetch(:error_color)  { @prompt.error_color }
  @cycle        = options.fetch(:cycle, false)
  @quiet        = options.fetch(:quiet) { @prompt.quiet }
  @symbols      = @prompt.symbols.merge(options.fetch(:symbols, {}))
  @input        = nil
  @done         = false
  @first_render = true
  @failure      = false
  @active       = @default
  @choices      = Choices.new
  @per_page     = options[:per_page]
  @page_help    = options[:page_help] || PAGE_HELP
  @paginator    = BlockPaginator.new
  @page_active  = @default
end

Instance Method Details

#call(question, possibilities, &block) ⇒ Object

Call the list menu by passing question and choices

Parameters:

  • question (String) 


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# File 'lib/tty2/prompt/enum_list.rb', line 147

def call(question, possibilities, &block)
  choices(possibilities)
  @question = question
  block[self] if block
  setup_defaults
  @prompt.subscribe(self) do
    render
  end
end

#choice(*value, &block) ⇒ Object

Add a single choice



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# File 'lib/tty2/prompt/enum_list.rb', line 119

def choice(*value, &block)
  if block
    @choices << (value << block)
  else
    @choices << value
  end
end

#choices(values = (not_set = true)) ⇒ Object

Add multiple choices

Parameters:

  • values (Array[Object]) (defaults to: (not_set = true)) —

    the values to add as choices



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# File 'lib/tty2/prompt/enum_list.rb', line 133

def choices(values = (not_set = true))
  if not_set
    @choices
  else
    values.each { |val| @choices << val }
  end
end

#default(default) ⇒ Object

Set default option selected



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# File 'lib/tty2/prompt/enum_list.rb', line 62

def default(default)
  @default = default
end

#default? ⇒ Boolean

Check if default value is set

Returns:

  • (Boolean) 


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# File 'lib/tty2/prompt/enum_list.rb', line 71

def default?
  !@default.to_s.empty?
end

#enum(value) ⇒ Object

Set selecting active index using number pad



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# File 'lib/tty2/prompt/enum_list.rb', line 105

def enum(value)
  @enum = value
end

#keyleft ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/tty2/prompt/enum_list.rb', line 193

def keyleft(*)
  if (@page_active - page_size) >= 0
    @page_active -= page_size
  elsif @cycle
    @page_active = @choices.size - 1
  end
end

#keypress(event) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/tty2/prompt/enum_list.rb', line 157

def keypress(event)
  if %i[backspace delete].include?(event.key.name)
    return if @input.empty?

    @input.chop!
    mark_choice_as_active
  elsif event.value =~ /^\d+$/
    @input += event.value
    mark_choice_as_active
  end
end

#keyreturn ⇒ Object Also known as: keyenter

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/tty2/prompt/enum_list.rb', line 169

def keyreturn(*)
  @failure = false
  num = @input.to_i
  choice_disabled = choices[num - 1] && choices[num - 1].disabled?
  choice_in_range = num > 0 && num <= @choices.size

  if choice_in_range && !choice_disabled || @input.empty?
    @done = true
  else
    @input = ""
    @failure = true
  end
end

#keyright ⇒ Object Also known as: keytab

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/tty2/prompt/enum_list.rb', line 184

def keyright(*)
  if (@page_active + page_size) <= @choices.size
    @page_active += page_size
  elsif @cycle
    @page_active = 1
  end
end

#page_help(text) ⇒ Object

Parameters:

  • text (String) —

    the help text to display per page



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# File 'lib/tty2/prompt/enum_list.rb', line 98

def page_help(text)
  @page_help = text
end

#page_size ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/tty2/prompt/enum_list.rb', line 82

def page_size
  (@per_page || Paginator::DEFAULT_PAGE_SIZE)
end

#paginated? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Check if list is paginated

Returns:

  • (Boolean) 


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# File 'lib/tty2/prompt/enum_list.rb', line 91

def paginated?
  @choices.size > page_size
end

#per_page(value) ⇒ Object

Set number of items per page



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# File 'lib/tty2/prompt/enum_list.rb', line 78

def per_page(value)
  @per_page = value
end

#quiet(value) ⇒ Object

Set quiet mode



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# File 'lib/tty2/prompt/enum_list.rb', line 112

def quiet(value)
  @quiet = value
end

#symbols(new_symbols = (not_set = true)) ⇒ Object

Change symbols used by this prompt

Parameters:

  • new_symbols (Hash) (defaults to: (not_set = true)) —

    the new symbols to use



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# File 'lib/tty2/prompt/enum_list.rb', line 53

def symbols(new_symbols = (not_set = true))
  return @symbols if not_set

  @symbols.merge!(new_symbols)
end