Class: Prawn::Format::TextObject

Inherits:
Object
  • Object
show all
Includes:
Graphics::Color
Defined in:
lib/prawn/format/text_object.rb

Constant Summary collapse

RENDER_MODES = 
{
  :fill             => 0,
  :stroke           => 1,
  :fill_stroke      => 2,
  :invisible        => 3,
  :fill_clip        => 4,
  :stroke_clip      => 5,
  :fill_stroke_clip => 6,
  :clip             => 7
}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TextObject

Returns a new instance of TextObject.



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# File 'lib/prawn/format/text_object.rb', line 21

def initialize
  @content = nil
  @last_x = @last_y = 0
end

Instance Method Details

#add_content(string) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 102

def add_content(string)
  @content << string << "\n"
end

#character_space(dc) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 56

def character_space(dc)
  @content << "#{dc} Tc\n"
  self
end

#close ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 31

def close
  @content << "ET"
  self
end

#font(identifier, size) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 71

def font(identifier, size)
  @content << "/#{identifier} #{size} Tf\n"
  self
end

#leading(dl) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 66

def leading(dl)
  @content << "#{dl} TL\n"
  self
end

#move_by(dx, dy) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 40

def move_by(dx,dy)
  @last_x += dx
  @last_y += dy
  @content << "#{dx} #{dy} Td\n"
  self
end

#move_to(x, y) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 36

def move_to(x, y)
  move_by(x - @last_x, y - @last_y)
end

#next_line(dy) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 47

def next_line(dy)
end

#open ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 26

def open
  @content = "BT\n"
  self
end

#render(mode) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 76

def render(mode)
  mode_value = RENDER_MODES[mode] || raise(ArgumentError, "unsupported render mode #{mode.inspect}, should be one of #{RENDER_MODES.keys.inspect}")
  @content << "#{mode_value} Tr\n"
  self
end

#rise(value) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 82

def rise(value)
  @content << "#{value} Ts\n"
  self
end

#rotate(x, y, theta) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 87

def rotate(x, y, theta)
  radians = theta * Math::PI / 180
  cos, sin = Math.cos(radians), Math.sin(radians)
  arr = [cos, sin, -sin, cos, x, y]
  add_content "%.3f %.3f %.3f %.3f %.3f %.3f Tm" % arr
end

#show(argument) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 50

def show(argument)
  instruction = argument.is_a?(Array) ? "TJ" : "Tj"
  @content << "#{Prawn::PdfObject(argument, true)} #{instruction}\n"
  self
end

#to_s ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 94

def to_s
  @content
end

#to_str ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 98

def to_str
  @content
end

#word_space(dw) ⇒ Object 



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# File 'lib/prawn/format/text_object.rb', line 61

def word_space(dw)
  @content << "#{dw} Tw\n"
  self
end