Class: Sevgi::Graphics::Mixtures::Identify::Identifiers

Inherits:
Object
  • Object
show all
Defined in:
lib/sevgi/graphics/mixtures/identify.rb

Overview

Immutable snapshot of every rendered element id under a subtree. Keys are the serialized id values, including "false" and the empty String. Keys and containers are owned by the index; values retain references to the elements present when the snapshot is built. Later tree changes require a new index.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(element) ⇒ void

Builds an id index for an element subtree.

Parameters:



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# File 'lib/sevgi/graphics/mixtures/identify.rb', line 24

def initialize(element)
  @element = element
  @namespace = {}
  @collision = {}

  build
  @namespace.freeze
  @collision.each_value(&:freeze)
  @collision.freeze
  freeze
end

Instance Attribute Details

#collision ⇒ Hash<String, Array<Sevgi::Graphics::Element>> (readonly)

Returns frozen duplicate groups keyed by serialized ids.

Returns:



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# File 'lib/sevgi/graphics/mixtures/identify.rb', line 19

def collision
  @collision
end

#element ⇒ Sevgi::Graphics::Element (readonly)

Returns indexed root element.

Returns:



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# File 'lib/sevgi/graphics/mixtures/identify.rb', line 13

def element
  @element
end

#namespace ⇒ Hash<String, Sevgi::Graphics::Element> (readonly)

Returns frozen namespace keyed by serialized rendered ids.

Returns:



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# File 'lib/sevgi/graphics/mixtures/identify.rb', line 16

def namespace
  @namespace
end

Instance Method Details

#[](id) ⇒ Sevgi::Graphics::Element?

Returns the first element registered for an id in the snapshot. Duplicate entries are available through #collision.

Parameters:

  • id (String) —

    serialized rendered SVG id

Returns:



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# File 'lib/sevgi/graphics/mixtures/identify.rb', line 46

def [](id) = @namespace[id]

#conflict? ⇒ Boolean

Reports whether duplicate ids were found.

Returns:

  • (Boolean) 


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# File 'lib/sevgi/graphics/mixtures/identify.rb', line 38

def conflict?
  !@collision.empty?
end