Class: Postsvg::Translation::PsRenderer

Inherits:
Object
  • Object
show all
Defined in:
lib/postsvg/translation/ps_renderer.rb

Overview

Top-level orchestrator: takes an Svg::Document, walks its element tree via a HandlerRegistry, and produces a Model::Program whose body the Serializer consumes.

Constant Summary collapse

DEFAULT_REGISTRY = 
HandlerRegistry.new

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(document, eps:, registry:) ⇒ PsRenderer

Returns a new instance of PsRenderer.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 54

def initialize(document, eps:, registry:)
  @document = document
  @eps = eps
  @registry = registry
end

Class Attribute Details

.default_registered ⇒ Object (readonly)

Returns the value of attribute default_registered.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 13

def default_registered
  @default_registered
end

Instance Attribute Details

#document ⇒ Object (readonly)

Returns the value of attribute document.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 52

def document
  @document
end

#eps ⇒ Object (readonly)

Returns the value of attribute eps.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 52

def eps
  @eps
end

#registry ⇒ Object (readonly)

Returns the value of attribute registry.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 52

def registry
  @registry
end

Class Method Details

.call(document, eps: false, registry: nil) ⇒ Object 



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# File 'lib/postsvg/translation/ps_renderer.rb', line 47

def self.call(document, eps: false, registry: nil)
  registry ||= default_registry
  new(document, eps: eps, registry: registry).call
end

.default_registry ⇒ Object

Public accessor: returns the default registry after ensuring handlers are registered. Use this in handlers instead of reaching for the constant directly.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 41

def default_registry
  register_default_handlers!
  DEFAULT_REGISTRY
end

.register_default_handlers! ⇒ Object

Idempotent: only registers once. Called automatically by default_registry before each translate, so callers don't need to remember to invoke it.



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# File 'lib/postsvg/translation/ps_renderer.rb', line 18

def register_default_handlers!
  return if @default_registered

  DEFAULT_REGISTRY.register(Svg::Elements::Svg, Handlers::SvgHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Group, Handlers::GroupHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Path, Handlers::PathHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Rect, Handlers::RectHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Circle, Handlers::CircleHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Ellipse, Handlers::EllipseHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Line, Handlers::LineHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Polyline, Handlers::PolylineHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Polygon, Handlers::PolygonHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Text, Handlers::TextHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Image, Handlers::ImageHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::Defs, Handlers::DefsHandler)
  DEFAULT_REGISTRY.register(Svg::Elements::ClipPath, Handlers::ClipPathHandler)
  DEFAULT_REGISTRY.register(Svg::OpenElement, Handlers::OpenHandler)
  @default_registered = true
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/postsvg/translation/ps_renderer.rb', line 60

def call
  emitter = RecordEmitter.new
  bbox = compute_viewport_bbox
  context = Context.new(emitter: emitter,
                        bounding_box: bbox,
                        clip_path_registry: document.clip_paths,
                        options: { eps: eps })
  dispatch(document.root_element, context)
  build_program(emitter, context)
end