Class: WebRubyUI::VNode

Inherits:
Object
  • Object
show all
Defined in:
lib/web_ruby_ui/vnode.rb

Overview

Represents a virtual DOM node in pure Ruby memory.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tag:, attributes: {}, children: [], text_content: nil) ⇒ VNode

Returns a new instance of VNode.



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# File 'lib/web_ruby_ui/vnode.rb', line 8

def initialize(tag:, attributes: {}, children: [], text_content: nil)
  @tag = tag.to_s.downcase
  @attributes = attributes || {}
  @children = children || []
  @text_content = text_content
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/web_ruby_ui/vnode.rb', line 6

def attributes
  @attributes
end

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/web_ruby_ui/vnode.rb', line 6

def children
  @children
end

#tag ⇒ Object (readonly)

Returns the value of attribute tag.



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# File 'lib/web_ruby_ui/vnode.rb', line 6

def tag
  @tag
end

#text_content ⇒ Object (readonly)

Returns the value of attribute text_content.



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# File 'lib/web_ruby_ui/vnode.rb', line 6

def text_content
  @text_content
end

Instance Method Details

#diff(other_vnode) ⇒ Object 



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# File 'lib/web_ruby_ui/vnode.rb', line 24

def diff(other_vnode)
  patches = []

  return [{ type: :remove }] if other_vnode.nil?

  return [{ type: :replace, new_node: other_vnode }] if tag != other_vnode.tag

  patches << { type: :update_text, new_text: other_vnode.text_content } if text_content != other_vnode.text_content

  # Attr diffing
  attr_diff = diff_attributes(attributes, other_vnode.attributes)
  patches << { type: :update_attrs, attrs: attr_diff } if attr_diff.any?

  patches
end

#to_h ⇒ Object 



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# File 'lib/web_ruby_ui/vnode.rb', line 15

def to_h
  {
    tag: @tag,
    attributes: @attributes,
    children: @children.map { |c| c.is_a?(VNode) ? c.to_h : c },
    text_content: @text_content
  }
end