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 505

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 502

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 495

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 482

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 428

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 431

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 427

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 578

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 513

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 525

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 518

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