Class: Prawn::SVG::Elements::Marker

Inherits:
Base
  • Object
show all
Defined in:
lib/prawn/svg/elements/marker.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 Base

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

Instance Method Summary collapse

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::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::Base

Instance Method Details

#apply_marker(element, point: nil, angle: 0) ⇒ Object 



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# File 'lib/prawn/svg/elements/marker.rb', line 11

def apply_marker(element, point: nil, angle: 0)
  sizing = Prawn::SVG::Calculators::DocumentSizing.new([0, 0], attributes)
  sizing.document_width = attributes['markerWidth'] || 3
  sizing.document_height = attributes['markerHeight'] || 3
  sizing.calculate

  if sizing.invalid?
    document.warnings << '<marker> cannot be rendered due to invalid sizing information'
    return
  end

  element.new_call_context_from_base do
    element.add_call 'save'

    # LATER : these will probably change when we separate out properties from attributes
    element.parse_transform_attribute_and_call
    element.parse_opacity_attributes_and_call
    element.parse_clip_path_attribute_and_call

    element.add_call 'transformation_matrix', 1, 0, 0, 1, point[0], -point[1]

    if attributes['orient'] != 'auto'
      angle = attributes['orient'].to_f # defaults to 0 if not specified
    end

    element.push_call_position
    element.add_call_and_enter 'rotate', -angle, origin: [0, y('0')] if angle != 0

    if attributes['markerUnits'] != 'userSpaceOnUse'
      scale = element.state.stroke_width
      element.add_call 'transformation_matrix', scale, 0, 0, scale, 0, 0
    end

    ref_x = x_pixels(attributes['refX']) || 0
    ref_y = y_pixels(attributes['refY']) || 0

    element.add_call 'transformation_matrix', 1, 0, 0, 1, -ref_x * sizing.x_scale, ref_y * sizing.y_scale

    if overflow_hidden?
      point = [sizing.x_offset * sizing.x_scale, y(sizing.y_offset * sizing.y_scale)]
      element.add_call 'rectangle', point, sizing.output_width, sizing.output_height
      element.add_call 'clip'
    end

    element.add_call 'transformation_matrix', sizing.x_scale, 0, 0, sizing.y_scale, 0, 0

    new_state = state.dup
    new_state.computed_properties = computed_properties.dup
    new_state.last_fill_opacity = element.state.last_fill_opacity
    new_state.last_stroke_opacity = element.state.last_stroke_opacity

    container = Prawn::SVG::Elements::Container.new(document, nil, [], new_state)
    container.properties.compute_properties(new_state.computed_properties)
    container.parse_and_apply
    container.add_calls_from_element(self)

    element.add_calls_from_element(container)

    element.pop_call_position
    element.add_call 'restore'
  end
end

#container? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prawn/svg/elements/marker.rb', line 7

def container?
  true
end

#parse ⇒ Object 



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# File 'lib/prawn/svg/elements/marker.rb', line 2

def parse
  properties.display = 'none'
  computed_properties.display = 'none'
end