Class: Liquid::BlockBody

Inherits:
Object
  • Object
show all
Defined in:
lib/liquid/block_body.rb,
lib/liquid/profiler/hooks.rb

Direct Known Subclasses

Document

Constant Summary collapse

FullToken = 
/\A#{TagStart}#{WhitespaceControl}?\s*(\w+)\s*(.*?)#{WhitespaceControl}?#{TagEnd}\z/om
ContentOfVariable = 
/\A#{VariableStart}#{WhitespaceControl}?(.*?)#{WhitespaceControl}?#{VariableEnd}\z/om
WhitespaceOrNothing = 
/\A\s*\z/
TAGSTART = 
"{%".freeze
VARSTART = 
"{{".freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BlockBody

Returns a new instance of BlockBody.



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# File 'lib/liquid/block_body.rb', line 11

def initialize
  @nodelist = []
  @blank = true
end

Instance Attribute Details

#nodelist ⇒ Object (readonly)

Returns the value of attribute nodelist.



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# File 'lib/liquid/block_body.rb', line 9

def nodelist
  @nodelist
end

Instance Method Details

#blank? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/liquid/block_body.rb', line 65

def blank?
  @blank
end

#parse(tokenizer, parse_context) {|nil, nil| ... } ⇒ Object

Yields:

  • (nil, nil) 


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# File 'lib/liquid/block_body.rb', line 16

def parse(tokenizer, parse_context)
  parse_context.line_number = tokenizer.line_number
  while token = tokenizer.shift
    next if token.empty?
    case
    when token.start_with?(TAGSTART)
      whitespace_handler(token, parse_context)
      unless token =~ FullToken
        raise_missing_tag_terminator(token, parse_context)
      end
      tag_name = $1
      markup = $2
      # fetch the tag from registered blocks
      unless tag = registered_tags[tag_name]
        # end parsing if we reach an unknown tag and let the caller decide
        # determine how to proceed
        return yield tag_name, markup
      end
      new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
      @blank &&= new_tag.blank?
      @nodelist << new_tag
    when token.start_with?(VARSTART)
      whitespace_handler(token, parse_context)
      @nodelist << create_variable(token, parse_context)
      @blank = false
    else
      if parse_context.trim_whitespace
        token.lstrip!
      end
      parse_context.trim_whitespace = false
      @nodelist << token
      @blank &&= !!(token =~ WhitespaceOrNothing)
    end
    parse_context.line_number = tokenizer.line_number
  end

  yield nil, nil
end

#render(context) ⇒ Object 



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# File 'lib/liquid/block_body.rb', line 69

def render(context)
  output = []
  context.resource_limits.render_score += @nodelist.length

  idx = 0
  while node = @nodelist[idx]
    case node
    when String
      check_resources(context, node)
      output << node
    when Variable
      render_node_to_output(node, output, context)
    when Block
      render_node_to_output(node, output, context, node.blank?)
      break if context.interrupt? # might have happened in a for-block
    when Continue, Break
      # If we get an Interrupt that means the block must stop processing. An
      # Interrupt is any command that stops block execution such as {% break %}
      # or {% continue %}
      context.push_interrupt(node.interrupt)
      break
    else # Other non-Block tags
      render_node_to_output(node, output, context)
      break if context.interrupt? # might have happened through an include
    end
    idx += 1
  end

  output.join
end

#render_node_with_profiling(node, output, context, skip_output = false) ⇒ Object Also known as: render_node_to_output 



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# File 'lib/liquid/profiler/hooks.rb', line 3

def render_node_with_profiling(node, output, context, skip_output = false)
  Profiler.profile_node_render(node) do
    render_node_without_profiling(node, output, context, skip_output)
  end
end

#whitespace_handler(token, parse_context) ⇒ Object 



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# File 'lib/liquid/block_body.rb', line 55

def whitespace_handler(token, parse_context)
  if token[2] == WhitespaceControl
    previous_token = @nodelist.last
    if previous_token.is_a? String
      previous_token.rstrip!
    end
  end
  parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
end