Class: String

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

Instance Method Summary collapse

Instance Method Details

#ansi_to_html ⇒ Object 



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# File 'lib/ansitags.rb', line 2

def ansi_to_html
  start_tags = 0

  low_intensity_colors = [
    '000000',
    '800000',
    '008000',
    '808000',
    '000080',
    '000080',
    '008080',
    'C0C0C0'
  ]

  high_intensity_colors = [
    '808080',
    'FF0000',
    '00FF00',
    'FFFF00',
    '0000FF',
    'FF00FF',
    '00FFFF',
    'FFFFFF'
  ]

  current_foreground_color = low_intensity_colors[0]
  current_background_color = high_intensity_colors[7]

  '<pre>' + self.gsub('&', '&amp;').gsub('"', '&quot;').gsub('<', '&lt;').gsub('>', '&gt;').gsub(/\e\[(\d*)m/) do |ansi_code|
    case $1.to_i
    when 0 # reset to default values
      end_tags = start_tags
      start_tags = 0
      '</span>' * end_tags
    when 1 # bold
      start_tags += 1
      '<span style="font-weight: bold;">'
    when 3 # italic
      start_tags += 1
      '<span style="font-style: italic;">'
    when 4 # underlined
      start_tags += 1
      '<span style="text-decoration: underline;">'
    when 7 # swap foreground and background colors
      start_tags += 1
      new_foreground_color     = current_background_color
      new_background_color     = current_foreground_color
      current_foreground_color = new_foreground_color
      current_background_color = new_background_color
      "<span style=\"color: ##{new_foreground_color}; background-color: ##{new_background_color};\">"
    when 8 # hidden
      start_tags += 1
      '<span style="visibility: hidden;">'
    when 22 # normal weight
      start_tags += 1
      '<span style="font-weight: normal;">'
    when 24 # not underlined
      start_tags += 1
      '<span style="text-decoration: none;">'
    when 28 # not hidden
      start_tags += 1
      '<span style="visibility: visible;">'
    when 30..37 # low intensity foreground colors
      start_tags += 1
      "<span style=\"color: ##{current_foreground_color = low_intensity_colors[$1.to_i - 30]};\">"
    when 39 # reset foreground color to default low intensity color
      start_tags += 1
      "<span style=\"color: ##{current_foreground_color = low_intensity_colors[0]};\">"
    when 40..47 # low intensity background colors
      start_tags += 1
      "<span style=\"background-color: ##{current_background_color = low_intensity_colors[$1.to_i - 40]};\">"
    when 49 # reset background color to default low intensity color
      start_tags += 1
      "<span style=\"background-color: ##{current_background_color = low_intensity_colors[7]};\">"
    when 90..97 # high intensity foreground colors
      start_tags += 1
      "<span style=\"color: ##{current_foreground_color = high_intensity_colors[$1.to_i - 90]};\">"
    when 99 # reset foreground color to default high intensity color
      start_tags += 1
      "<span style=\"color: ##{current_foreground_color = high_intensity_colors[0]};\">"
    when 100..107 # high intensity background colors
      start_tags += 1
      "<span style=\"background-color: ##{current_background_color = high_intensity_colors[$1.to_i - 100]};\">"
    when 109 # reset background color to default high intensity color
      start_tags += 1
      "<span style=\"background-color: ##{current_background_color = high_intensity_colors[7]};\">"
    end
  end + '</span>' * start_tags + '</pre>'
end