Class: Luoma::ForTag

Inherits:
Markup show all
Defined in:
lib/luoma/tags/for.rb,
sig/luoma/tags/for.rbs

Constant Summary collapse

END_FOR_BLOCK =

Returns:

  • (Set[String]) 
Set["else", "endfor"]

Instance Attribute Summary

Attributes inherited from Markup

#blank, #tag_name, #token

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Markup

#partial, #template_scope

Constructor Details

#initialize(token, tag_name, params, expression, block, default) ⇒ Object

Signature:

  • (t_token, String, Array[Name], Expression, t_block, t_block?) -> void



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# File 'lib/luoma/tags/for.rb', line 35

def initialize(token, tag_name, params, expression, block, default)
  super(token)
  @tag_name = tag_name
  @params = params
  @expression = expression

  @blank = Luoma.blank_block?(block) && (!default || Luoma.blank_block?(default))

  @block = if @blank
             block.grep_v(String)
           else
             block
           end

  @default = if blank && default
               default.grep_v(String)
             else
               default
             end
end

Class Method Details

.parse(token, tag_name, parser) ⇒ Markup

(t_token, String, Parser) -> Markup

Parameters:

  • token (t_token)
  • tag_name (String)
  • parser (Parser)

Returns:



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# File 'lib/luoma/tags/for.rb', line 8

def self.parse(token, tag_name, parser)
  params = [parser.parse_ident] #: Array[Name]

  while parser.kind == :token_comma
    parser.next
    params << parser.parse_ident
  end

  parser.eat(:token_in, message: "missing 'in'")
  parser.expect_expression
  expr = parser.parse_expression
  parser.carry_whitespace_control
  parser.eat(:token_tag_end)

  block = parser.parse_block(stop: END_FOR_BLOCK)

  default = if parser.tag?("else")
              parser.eat_empty_tag("else")
              parser.parse_block(stop: END_FOR_BLOCK)
            end

  parser.eat_empty_tag("endfor")

  new(token, tag_name, params, expr, block, default)
end

Instance Method Details

#block_scope ⇒ Object

Signature:

  • () -> Array[Name]



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# File 'lib/luoma/tags/for.rb', line 104

def block_scope
  @params
end

#children(static_context) ⇒ Object

Signature:

  • (RenderContext) -> Array[Markup]



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# File 'lib/luoma/tags/for.rb', line 92

def children(static_context)
  result = @block.grep_v(String) #: Array[Markup]
  result.concat(@default.grep_v(String)) if @default # steep:ignore
  result
end

#expressions ⇒ Object

Signature:

  • () -> Array[Expression]



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# File 'lib/luoma/tags/for.rb', line 99

def expressions
  [@expression, @offset, @limit].compact
end

#render(context, buffer) ⇒ Object

Signature:

  • (RenderContext, String) -> void



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# File 'lib/luoma/tags/for.rb', line 57

def render(context, buffer)
  array = context.env.to_a(@expression.evaluate(context), context)

  if array.empty? && @default
    Luoma.render_block(@default || raise, context, buffer)
    return
  end

  namespace = {} #: Hash[String, untyped]
  namespace[@params[2].value] = array if @params.length > 2

  name_param = @params.first.value
  index_param = @params[1].value if @params.length > 1
  length = array.length

  context.extends(namespace) do
    index = 0
    while index < length
      namespace[name_param] = array[index]
      namespace[index_param] = index if index_param
      index += 1

      Luoma.render_block(@block, context, buffer)

      case context.interrupts.pop
      when :continue
        next
      when :break
        break
      end
    end
  end
end