Class: Moxml::C14n::NamespaceContext

Inherits:
Object
  • Object
show all
Defined in:
lib/moxml/c14n/namespace_context.rb

Overview

Tracks in-scope namespace URIs along the ancestor chain of the element currently being canonicalized. The canonicalizer pushes when entering an element and pops when leaving.

xml prefix is always bound to the XML namespace per XML 1.0 spec.

Constant Summary collapse

DEFAULT_XML_BINDING = 
{ "xml" => C14n::XML_URI }.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(initial = {}) ⇒ NamespaceContext

Returns a new instance of NamespaceContext.



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# File 'lib/moxml/c14n/namespace_context.rb', line 15

def initialize(initial = {})
  @stack = []
  @bindings = DEFAULT_XML_BINDING.dup
  merge(initial)
end

Instance Attribute Details

#bindings ⇒ Object (readonly)

Returns the value of attribute bindings.



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# File 'lib/moxml/c14n/namespace_context.rb', line 13

def bindings
  @bindings
end

Instance Method Details

#binding_for(prefix) ⇒ Object 



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# File 'lib/moxml/c14n/namespace_context.rb', line 49

def binding_for(prefix)
  @bindings[prefix]
end

#include?(prefix) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/c14n/namespace_context.rb', line 53

def include?(prefix)
  @bindings.key?(prefix)
end

#pop ⇒ Object 



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# File 'lib/moxml/c14n/namespace_context.rb', line 32

def pop
  applied = @stack.pop
  applied.each do |prefix, prev|
    if prev.nil?
      @bindings.delete(prefix)
      @bindings[prefix] = C14n::XML_URI if prefix == "xml"
    else
      @bindings[prefix] = prev
    end
  end
  self
end

#push(bindings_to_apply) ⇒ Object 



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# File 'lib/moxml/c14n/namespace_context.rb', line 21

def push(bindings_to_apply)
  applied = {}
  bindings_to_apply.each do |prefix, uri|
    prev = @bindings[prefix]
    applied[prefix] = prev
    @bindings[prefix] = uri
  end
  @stack.push(applied)
  self
end

#to_h ⇒ Object 



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# File 'lib/moxml/c14n/namespace_context.rb', line 57

def to_h
  @bindings.dup
end

#uri_for(prefix) ⇒ Object 



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# File 'lib/moxml/c14n/namespace_context.rb', line 45

def uri_for(prefix)
  @bindings[prefix]
end