Class: Prune::Shapes::TextBox

Inherits:
Base
  • Object
show all
Defined in:
lib/prune/shapes/text_box.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#id, #x, #y

Instance Method Summary collapse

Methods included from Functions

#mm_to_pt, #pt_to_mm

Constructor Details

#initialize(page, string, options = {}) ⇒ TextBox

Initialize.

Raises:



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# File 'lib/prune/shapes/text_box.rb', line 10

def initialize(page, string, options = {})
  super(page)
  # Set instance variables.
  @id = options[:id] if options.key?(:id)
  @x = @page.x
  @y = @page.y
  @options = options
  # Erase "\r\n" and "\r" line feeds.
  @string = string.gsub(/\r\n/, "\n").gsub(/\r/, "\n")
  @string << "\n" unless /\n\z/ === @string
  # Parse font options.
  Elements::Page::FONT_OPTIONS.each do |sym|
    @page.current_font[sym] = @page.default_font[sym]
    if options.key?(:font) && options[:font].key?(sym)
      @page.current_font[sym] = options[:font][sym]
    end
  end
  # Get font.
  @font = get_font(@page.current_font[:name],
    :bold => @page.current_font[:bold],
    :italic => @page.current_font[:italic])
  raise FontNotSpecifiedError if @font.nil?
  @font_size = @page.current_font[:size]
  # Text align.
  @text_align = options[:text_align] || :left
  @width = get_width(@string, @font, @font_size, options[:width])
  @height = get_height(@string, @font, @font_size, options[:height])
end

Instance Attribute Details

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/prune/shapes/text_box.rb', line 7

def height
  @height
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/prune/shapes/text_box.rb', line 6

def width
  @width
end

Instance Method Details

#render ⇒ Object

Render shape.



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# File 'lib/prune/shapes/text_box.rb', line 40

def render
  # Define local variables.
  current_x = @x
  current_y = @y
  boundary = [@x, @y, @width, @height]

  # Render background color.
  render_background_color(boundary)
  # Render borders.
  render_rectangle_border(boundary)
  render_top_border(boundary)
  render_left_border(boundary)
  render_right_border(boundary)
  render_bottom_border(boundary)

  # Render String.
  stream = []
  current_y -= @font_size
  stream << "q"
  # Set colors.
  stroke_color = @page.current_font[:stroke_color]
  fill_color = @page.current_font[:fill_color]
  mode = font_mode(@page.current_font[:mode])
  stream << "%s RG" % convert_color_str(stroke_color)
  stream << "%s rg" % convert_color_str(fill_color)

  # Write String.
  x_before_align = current_x
  @string.scan(/([^\n]*)\n/) do |token|
    line = $1
    line_width = @font.width(line, @font_size)
    current_x =
      x_of_text_align(line_width, @width, x_before_align, @text_align)
    # Set to stream.
    if line.size > 0
      stream << "BT"
      stream << "%s %d Tf" % [@font.name, @font_size]
      stream << "%.2f %.2f Td" % [current_x, current_y]
      stream << "%d Tr" % mode
      stream << "%s Tj" % @font.decode(line)
      stream << "ET"
    end
    current_y -= @font_size
  end
  stream << "Q"
  super(stream)
end