Class: Prawn::SVG::Elements::TextPath

Inherits:
TextComponent show all
Defined in:
lib/prawn/svg/elements/text_path.rb

Constant Summary

Constants inherited from Base

Base::COMMA_WSP_REGEXP, Base::MissingAttributesError, Base::PAINT_TYPES, Base::SVG_NAMESPACE, Base::SkipElementError, Base::SkipElementQuietly

Constants included from Attributes::Stroke

Attributes::Stroke::CAP_STYLE_TRANSLATIONS, Attributes::Stroke::JOIN_STYLE_TRANSLATIONS

Instance Attribute Summary

Attributes inherited from TextComponent

#children, #dx, #dy, #fallback_fonts, #font, #inside_clip_path, #length_adjust, #parent_component, #rotation, #text_length, #x_values, #y_values

Attributes inherited from Base

#attributes, #base_calls, #calls, #document, #parent_calls, #properties, #source, #state

Instance Method Summary collapse

Methods inherited from TextComponent

#calculated_width, #current_length_adjust_is_scaling?, #initialize, #kerning_enabled?, #kerning_pixels, #lay_out, #letter_spacing_pixels, #word_spacing_pixels

Methods inherited from DirectRenderBase

#render

Methods inherited from Base

#initialize, #name, #parse_and_apply, #process

Methods included from TransformParser

#parse_transform_attribute

Methods included from PDFMatrix

#load_matrix, #matrix_for_pdf, #rotation_matrix, #scale_matrix, #translation_matrix

Methods included from Attributes::Space

#parse_xml_space_attribute

Methods included from Attributes::Stroke

#parse_stroke_attributes_and_call

Methods included from Attributes::Mask

#parse_mask_attribute_and_call

Methods included from Attributes::ClipPath

#parse_clip_path_attribute_and_call

Methods included from Attributes::Opacity

#parse_opacity_attributes_and_call

Methods included from Attributes::Transform

#parse_transform_attribute_and_call

Constructor Details

This class inherits a constructor from Prawn::SVG::Elements::TextComponent

Instance Method Details

#parse ⇒ Object

Raises:



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# File 'lib/prawn/svg/elements/text_path.rb', line 3

def parse
  href = href_attribute
  unless href&.start_with?('#')
    warnings << '<textPath> must reference a path element'
    raise SkipElementQuietly
  end

  @path_element = document.elements_by_id[href[1..]]
  unless @path_element.is_a?(Elements::Path)
    warnings << "<textPath> reference '#{href}' is not a path element"
    raise SkipElementQuietly
  end

  @path_length = Calculators::PathLength.new(@path_element.commands)

  raise SkipElementQuietly if @path_length.total_length <= 0

  @start_offset = parse_start_offset

  super
end

#render_component(prawn, renderer, _cursor, _translate_x = nil, accumulated_baseline_shift = 0) ⇒ Object

Raises:



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# File 'lib/prawn/svg/elements/text_path.rb', line 25

def render_component(prawn, renderer, _cursor, _translate_x = nil, accumulated_baseline_shift = 0)
  raise SkipElementQuietly if computed_properties.display == 'none'

  add_yield_call do
    size = computed_properties.numeric_font_size
    y_offset = dominant_baseline_offset(prawn, size || prawn.font_size) || 0

    with_svg_fonts(prawn) do
      total_baseline_shift = accumulated_baseline_shift + baseline_shift_offset(prawn, size)
      y_offset += total_baseline_shift

      current_distance = @start_offset
      render_children_along_path(prawn, children, size, y_offset, current_distance)
    end
  end

  renderer.render_calls(prawn, base_calls)
end

#transformable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prawn/svg/elements/text_path.rb', line 44

def transformable?
  false
end