Class: Ea::Svg::EaEmitter::Document

Inherits:
Object
  • Object
show all
Defined in:
lib/ea/svg/ea_emitter/document.rb

Overview

Top-level orchestrator: emits a complete standalone SVG document matching EA's encoding. Bound computation and layer sequencing delegated to BoundsCalculator and LayerSequencer respectively (SRP).

Constant Summary collapse

BUILD_ID = 
"1624"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(diagram, model_index:, frame: true, document: nil, **_options) ⇒ Document

Returns a new instance of Document.



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# File 'lib/ea/svg/ea_emitter/document.rb', line 15

def initialize(diagram, model_index:, frame: true, document: nil, **_options)
  @diagram = diagram
  @model_index = model_index
  @frame = frame
  @document = document
end

Instance Attribute Details

#diagram ⇒ Object (readonly)

Returns the value of attribute diagram.



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# File 'lib/ea/svg/ea_emitter/document.rb', line 13

def diagram
  @diagram
end

#document ⇒ Object (readonly)

Returns the value of attribute document.



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# File 'lib/ea/svg/ea_emitter/document.rb', line 13

def document
  @document
end

#frame ⇒ Object (readonly)

Returns the value of attribute frame.



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# File 'lib/ea/svg/ea_emitter/document.rb', line 13

def frame
  @frame
end

#model_index ⇒ Object (readonly)

Returns the value of attribute model_index.



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# File 'lib/ea/svg/ea_emitter/document.rb', line 13

def model_index
  @model_index
end

Instance Method Details

#emit_images ⇒ Object

Walks t_image rows (when the document carries a Database with an :images collection) and invokes EmfRenderer on each. Emits an <image> element per successfully converted SVG, or returns nil when no images or all conversions fail.

The emfsvg gem currently can't parse EA's specific EMF variant (see TODO.diagrams/87 + TODO.complete/56). Until upstream emfsvg supports it, this method returns nil gracefully. The wiring is correct infrastructure for when emfsvg catches up.



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# File 'lib/ea/svg/ea_emitter/document.rb', line 45

def emit_images
  return nil unless document
  return nil unless document.is_a?(Ea::Qea::Database)

  images = document.collections[:images] || []
  return nil if images.empty?

  fragments = images.filter_map { |image| render_image(image) }
  return nil if fragments.empty?

  %(<g id="images">\n#{fragments.join("\n")}\n</g>)
end

#render ⇒ Object 



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# File 'lib/ea/svg/ea_emitter/document.rb', line 22

def render
  canvas = Canvas.from(diagram, model_index: model_index)
  layers = LayerSequencer.new(diagram, model_index: model_index,
                                canvas: canvas, frame: frame,
                                document: document)
                          .layers
                          .reject { |s| s.nil? || s.empty? }
  image_layer = emit_images
  layers << image_layer if image_layer

  %(<?xml version="1.0" encoding="UTF-8" standalone="no"?>\n<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">\n\n<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="#{canvas.width_cm}" height="#{canvas.height_cm}" viewBox="#{canvas.view_box}">\n<title></title>\n<desc>Created with Enterprise Architect (Build: #{BUILD_ID}) 2</desc>\n#{layers.join("\n")}\n</svg>)
end