Class: AnsiSys::Screen

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

Constant Summary collapse

CODE_LETTERS =

Escape sequence codes processed in this Class

%w()

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(colors = Screen.default_css_colors, max_col = nil, max_row = nil) ⇒ Screen

a Screen



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# File 'lib/ansisys.rb', line 488

def initialize(colors = Screen.default_css_colors, max_col = nil, max_row = nil)
  @colors = colors
  @max_col = max_col
  @max_row = max_row
  @lines = Hash.new{|hash, key| hash[key] = Hash.new}
end

Instance Attribute Details

#lines ⇒ Object (readonly)

a Hash of keys as rows, which each value a Hash of keys columns and each value as an Array of character, its width, and associated SGR



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# File 'lib/ansisys.rb', line 485

def lines
  @lines
end

Class Method Details

.css_style(*args) ⇒ Object

CSS stylelet to be used in <head>. Takes the same arguments as Screen::css_styles().



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# File 'lib/ansisys.rb', line 478

def self.css_style(*args)
  return "pre.screen {\n\t" + CSSFormatter.hash_to_styles(self.css_styles(*args), ";\n\t") + ";\n}\n"
end

.css_styles(colors = Screen.default_css_colors, max_col = nil, max_row = nil) ⇒ Object

a Hash of CSS stylelet to be used in <head>



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# File 'lib/ansisys.rb', line 465

def self.css_styles(colors = Screen.default_css_colors, max_col = nil, max_row = nil)
  h = {
    'color' => [colors[:normal][:white]],
    'background-color' => [colors[:normal][:black]],
    'padding' => ['0.5em'],
  }
  h['width'] = ["#{Float(max_col)/2}em"] if max_col
  #h['height'] = ["#{max_row}em"] if max_row # could not find appropriate unit
  return h
end

.default_background ⇒ Object 



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# File 'lib/ansisys.rb', line 411

def self.default_background; :black; end

.default_css_colors(inverted = false, bright = false) ⇒ Object

a Hash of color names for each intensity



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# File 'lib/ansisys.rb', line 414

def self.default_css_colors(inverted = false, bright = false)
  r = {
    :normal => {
      :black => 'black',
      :red => 'maroon',
      :green => 'green',
      :yellow => 'olive',
      :blue => 'navy',
      :magenta => 'purple',
      :cyan => 'teal',
      :white => 'silver',
    },
    :bold => {
      :black => 'gray',
      :red => 'red',
      :green => 'lime',
      :yellow => 'yellow',
      :blue => 'blue',
      :magenta => 'fuchsia',
      :cyan => 'cyan',
      :white => 'white'
    },
    :faint => {
      :black => 'black',
      :red => 'maroon',
      :green => 'green',
      :yellow => 'olive',
      :blue => 'navy',
      :magenta => 'purple',
      :cyan => 'teal',
      :white => 'silver',
    },
  }

  if bright
    r[:bold][:black] = 'black'
    [:normal, :faint].each do |i|
      r[i] = r[:bold]
    end
  end

  if inverted
    r.each_key do |i|
      r[i][:black], r[i][:white] = r[i][:white], r[i][:black]
    end
  end

  return r
end

.default_foreground ⇒ Object

:nodoc:



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# File 'lib/ansisys.rb', line 410

def self.default_foreground; :white; end

Instance Method Details

#apply_code!(letter, *pars) ⇒ Object

applies self an escape sequence code that ends with letter as String and with some pars as Integers



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# File 'lib/ansisys.rb', line 561

def apply_code!(letter, *pars)
  return self
end

#css_style ⇒ Object

CSS stylelet to be used in <head>



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# File 'lib/ansisys.rb', line 496

def css_style
  self.class.css_style(@colors, @max_col, @max_row)
end

#render(format = :html, css_class = 'screen', css_style = nil) ⇒ Object

render the characters into :html or :text Class name in CSS can be specified as css_class. Additional stylelet can be specified as css_style.



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# File 'lib/ansisys.rb', line 508

def render(format = :html, css_class = 'screen', css_style = nil)
  result = case format
  when :text
    ''
  when :html
    %Q|<pre#{css_class ? %Q[ class="#{css_class}"] : ''}#{css_style ? %Q| style="#{css_style}"| : ''}>\n|
  else
    raise AnsiSysError, "Invalid format option to render: #{format.inspect}"
  end

  unless @lines.keys.empty?
    prev_sgr = nil
    max_row = @lines.keys.max
    (1..max_row).each do |row|
      if @lines.has_key?(row) and not @lines[row].keys.empty?
        col = 1
        while col <= @lines[row].keys.max
          if @lines[row].has_key?(col) and @lines[row][col]
            char, width, sgr = @lines[row][col]
            if prev_sgr != sgr
              result += prev_sgr.render(format, :postfix, @colors) if prev_sgr
              result += sgr.render(format, :prefix, @colors)
              prev_sgr = sgr
            end
            case format
            when :text
              result += char
            when :html
              result += WEBrick::HTMLUtils.escape(char)
            end
            col += width
          else
            result += ' '
            col += 1
          end
        end
      end
      result += "\n" if row < max_row
    end
    result += prev_sgr.render(format, :postfix, @colors) if prev_sgr
  end

  result += case format
  when :text
    ''
  when :html
    '</pre>'
  end
  return result
end

#write(char, char_width, col, row, sgr) ⇒ Object

register the char at a specific location on Screen



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# File 'lib/ansisys.rb', line 501

def write(char, char_width, col, row, sgr)
  @lines[Integer(row)][Integer(col)] = [char, char_width, sgr.dup]
end