Class: Text::HTMLHighlighter

Inherits:
Highlighter show all
Defined in:
lib/wad/vendor/highlight.rb

Overview

Highlights using HTML. Fonts are highlighted using <span> tags, not <font>. Also note that reverse is translated to white on black. According to www.w3.org/TR/REC-CSS2/syndata.html#value-def-color, valid color keywords are: aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, and yellow. Thus, no magenta or cyan.

Constant Summary

Constants inherited from Highlighter

Text::Highlighter::ANSI, Text::Highlighter::ATTRIBUTES, Text::Highlighter::HTML, Text::Highlighter::NONE, Text::Highlighter::VERSION

Instance Method Summary collapse

Methods inherited from Highlighter

#background, #code, #color, #foreground

Constructor Details

#initialize ⇒ HTMLHighlighter

Returns a new instance of HTMLHighlighter.



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# File 'lib/wad/vendor/highlight.rb', line 114

def initialize
  # we need to know what we're resetting from (bold, font, underlined ...)
  @stack = []
end

Instance Method Details

#color_value(cname) ⇒ Object 



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# File 'lib/wad/vendor/highlight.rb', line 138

def color_value(cname)
  case cname
  when "cyan"
    "#00FFFF"
  when "magenta"
    "#FF00FF"
  else
    cname
  end
end

#end_style ⇒ Object

Returns the end tag (“</span>”).



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# File 'lib/wad/vendor/highlight.rb', line 134

def end_style
  "</span>"
end

#name_to_code(name) ⇒ Object

Returns the code for the given name.



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# File 'lib/wad/vendor/highlight.rb', line 151

def name_to_code(name)
  @stack << name

  case name
  when "none", "reset"
    @stack.pop
    str = ""
    if @stack.length > 0
      begin
        prev = @stack.pop
        case prev
        when "bold"
          str << "</b>"
        when "underscore", "underline"
          str << "</u>"
        when "blink"
          str << "</blink>"
        when "concealed"
          str << " -->"
        else
          str << end_style
        end
      end while @stack.length > 0
    end
    str
  when "bold"
    "<b>"
  when "underscore", "underline"
    "<u>"
  when "blink"
    "<blink>"
  when "concealed"
    "<!-- "
  else
    start_style(name)
  end
end

#start_style(name) ⇒ Object

Returns the start tag for the given name.



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# File 'lib/wad/vendor/highlight.rb', line 121

def start_style(name)
  case name
  when "reverse"
    "<span style=\"color: white; background-color: black\">"
  when /on_(\w+)/
    "<span style=\"background-color: #{$1}\">"
  else
    "<span style=\"color: #{name}\">"
  end
end