Class: Prosereflect::Schema::Fragment

Inherits:
Object
  • Object
show all
Defined in:
lib/prosereflect/schema/fragment.rb

Overview

Lightweight Fragment class for schema validation This is a minimal implementation focused on the operations needed by ContentMatch

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content = []) ⇒ Fragment

Returns a new instance of Fragment.



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# File 'lib/prosereflect/schema/fragment.rb', line 10

def initialize(content = [])
  @content = content.is_a?(Array) ? content : [content].compact
end

Instance Attribute Details

#content ⇒ Object (readonly)

Returns the value of attribute content.



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# File 'lib/prosereflect/schema/fragment.rb', line 8

def content
  @content
end

Class Method Details

.empty ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 150

def empty
  @empty ||= new([])
end

.from(nodes) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 154

def from(nodes)
  return empty if nodes.nil? || (nodes.is_a?(Array) && nodes.empty?)

  case nodes
  when Fragment then nodes
  when Array then new(nodes)
  else new([nodes])
  end
end

Instance Method Details

#<<(node) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 46

def <<(node)
  @content << node
  self
end

#[](index) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 30

def [](index)
  @content[index]
end

#[]=(index, value) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 34

def []=(index, value)
  @content[index] = value
end

#append(other) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 51

def append(other)
  return self if other.empty?
  return other if empty?

  last_node = @content.last
  first_other = other.first

  if last_node.text? && first_other.text? && last_node.same_markup?(first_other)
    merged = last_node.with_text(last_node.text + first_other.text)
    new_content = @content[0...-1] + [merged] + other.content[1..]
    Fragment.new(new_content)
  else
    Fragment.new(@content + other.content)
  end
end

#cut(from = 0, to = nil) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 67

def cut(from = 0, to = nil)
  to ||= size
  return Fragment.empty if from.zero? && to == size

  return Fragment.empty if to <= from

  result = []
  pos = 0
  i = 0

  while pos < to && i < @content.length
    child = @content[i]
    child_end = pos + child.node_size

    if child_end > from
      if pos < from || child_end > to
        if child.text?
          start_offset = [0, from - pos].max
          end_offset = [child.text.length, to - pos].min
        else
          start_offset = [0, from - pos - 1].max
          end_offset = [child.content.size, to - pos - 1].min
        end
        cut_child = child.cut(start_offset, end_offset)
        result << cut_child if cut_child
      else
        result << child
      end
    end

    pos = child_end
    i += 1
  end

  Fragment.new(result)
end

#descendants(f) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 141

def descendants(f)
  nodes_between(0, size, f)
end

#each(&block) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 42

def each(&block)
  @content.each(&block)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prosereflect/schema/fragment.rb', line 18

def empty?
  @content.empty?
end

#eq?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prosereflect/schema/fragment.rb', line 112

def eq?(other)
  return false unless @content.length == other.content.length

  @content.each_with_index.all? { |node, i| node.eq?(other.content[i]) }
end

#first ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 22

def first
  @content.first
end

#last ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 26

def last
  @content.last
end

#length ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 38

def length
  @content.length
end

#nodes_between(from, to, f, node_start = 0) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 118

def nodes_between(from, to, f, node_start = 0)
  i = 0
  pos = 0

  while pos < to && i < @content.length
    child = @content[i]
    end_pos = pos + child.node_size

    if end_pos > from && f.call(child, node_start + pos,
                                i) != false && child.content.size.positive?
      child.nodes_between(
        [0, from - pos].max,
        [child.content.size, to - pos].min,
        f,
        node_start + pos + 1,
      )
    end

    pos = end_pos
    i += 1
  end
end

#replace_child(index, replacement) ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 104

def replace_child(index, replacement)
  return self if @content[index] == replacement

  new_content = @content.dup
  new_content[index] = replacement
  Fragment.new(new_content)
end

#size ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 14

def size
  @content.sum(&:node_size)
end

#to_s ⇒ Object 



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# File 'lib/prosereflect/schema/fragment.rb', line 145

def to_s
  "<#{@content.join(', ')}>"
end