Class: Pdfrb::Layout::TextFragment

Inherits:
Object
  • Object
show all
Defined in:
lib/pdfrb/layout/text_fragment.rb

Overview

A single fragment of styled text — one run of consecutive glyphs with the same Style. Pieces are [[glyph_id, x_offset, width], ...] in font units.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pieces:, style:, width:, height:, y_min:, y_max:) ⇒ TextFragment

Returns a new instance of TextFragment.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 11

def initialize(pieces:, style:, width:, height:, y_min:, y_max:)
  @pieces = pieces
  @style = style
  @width = width
  @height = height
  @y_min = y_min
  @y_max = y_max
end

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 9

def height
  @height
end

#pieces ⇒ Object (readonly)

Returns the value of attribute pieces.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 9

def pieces
  @pieces
end

#style ⇒ Object (readonly)

Returns the value of attribute style.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 9

def style
  @style
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 9

def width
  @width
end

#y_max ⇒ Object (readonly)

Returns the value of attribute y_max.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 9

def y_max
  @y_max
end

#y_min ⇒ Object (readonly)

Returns the value of attribute y_min.



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# File 'lib/pdfrb/layout/text_fragment.rb', line 9

def y_min
  @y_min
end

Instance Method Details

#ascender ⇒ Object 



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# File 'lib/pdfrb/layout/text_fragment.rb', line 20

def ascender
  @y_max
end

#descender ⇒ Object 



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# File 'lib/pdfrb/layout/text_fragment.rb', line 24

def descender
  -@y_min
end

#draw(canvas, x, y) ⇒ Object 



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# File 'lib/pdfrb/layout/text_fragment.rb', line 28

def draw(canvas, x, y)
  canvas.save_graphics_state do
    if @style.fill_color
      canvas.fill_color(@style.fill_color)
    end
    canvas.text(@pieces.map(&:first).pack("U*"), at: [x, y],
                                                 font: font_name_for_canvas, size: @style.font_size)
  end
end