Class: Vedeu::Renderers::Escape

Inherits:
File
  • Object
show all
Includes:
Options
Defined in:
lib/vedeu/renderers/escape.rb

Overview

Converts a grid of Cells objects or Cells::Char objects into a stream of characters without escape sequences.

Instance Attribute Summary

Attributes included from Options

#options

Instance Method Summary collapse

Methods included from Options

#compression, #compression?, #default_template, #defaults, #end_row_tag, #end_tag, #filename, #initialize, #output, #output?, #render, #start_row_tag, #start_tag, #template, #timestamp, #timestamp?, #write, #write_file, #write_file?

Methods included from Common

#absent?, #array?, #boolean, #boolean?, #empty_value?, #escape?, #falsy?, #hash?, #line_model?, #numeric?, #positionable?, #present?, #snake_case, #stream_model?, #string?, #symbol?, #truthy?, #view_model?

Methods inherited from File

#write, #write_file?

Instance Method Details

#buffer ⇒ Array<String> (private)

Returns:

  • (Array<String>) 


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# File 'lib/vedeu/renderers/escape.rb', line 37

def buffer
  empty = Array.new(Vedeu.height) { Array.new(Vedeu.width) { '[:cell]' } }

  output.each do |row|
    row.each do |char|
      next unless renderable?(char) &&
                  positionable?(char) &&
                  escapable?(char)

      empty[char.position.y - 1][char.position.x - 1] = char.to_ast
    end
  end

  empty
end

#clear ⇒ String

Render a cleared output.

Returns:

  • (String) 


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# File 'lib/vedeu/renderers/escape.rb', line 18

def clear
  render('[[:clear]]')
end

#content ⇒ String (private)

Combine all characters in a row to produce a line, then all lines should be terminated with ‘n`. Convert to an array of UTF8 codepoints, and any codepoint above 255 should be converted to a space.

Returns:

  • (String) 


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# File 'lib/vedeu/renderers/escape.rb', line 30

def content
  return '[[:empty]]' if string?(output) || absent?(output)

  buffer.map { |row| row.join("\n") }.join("\n\n")
end

#escapable?(char) ⇒ Boolean (private)

Returns:



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# File 'lib/vedeu/renderers/escape.rb', line 82

def escapable?(char)
  char.respond_to?(:to_ast)
end

#renderable?(char) ⇒ Boolean (private)

Returns:



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# File 'lib/vedeu/renderers/escape.rb', line 77

def renderable?(char)
  renderables.include?(char.class)
end

#renderables ⇒ Array<Class> (private)

Returns:

  • (Array<Class>) 


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# File 'lib/vedeu/renderers/escape.rb', line 54

def renderables
  [
    Vedeu::Cells::Border,
    Vedeu::Cells::BottomHorizontal,
    Vedeu::Cells::BottomLeft,
    Vedeu::Cells::BottomRight,
    Vedeu::Cells::Corner,
    Vedeu::Cells::Char,
    Vedeu::Cells::Clear,
    Vedeu::Cells::Cursor,
    Vedeu::Cells::Empty,
    Vedeu::Cells::Escape,
    Vedeu::Cells::Horizontal,
    Vedeu::Cells::LeftVertical,
    Vedeu::Cells::RightVertical,
    Vedeu::Cells::TopHorizontal,
    Vedeu::Cells::TopLeft,
    Vedeu::Cells::TopRight,
    Vedeu::Cells::Vertical,
  ]
end