Class: HtmlTag::Inbound

Inherits:
Object
  • Object
show all
Defined in:
lib/html-tag/inbound.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context = nil) ⇒ Inbound

Returns a new instance of Inbound.



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# File 'lib/html-tag/inbound.rb', line 32

def initialize context = nil
  # copy all instance varialbes from context
  for el in context.instance_variables
    unless el.to_s.include?('@_')
      val = context.instance_variable_get el
      instance_variable_set el, val
    end
  end

  # lets keep all instance vars in one object
  @_iv = IVARS.new
  @_iv.context   = context
  @_iv.data      = []
  @_iv.depth     = 0
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &block) ⇒ Object 



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# File 'lib/html-tag/inbound.rb', line 150

def method_missing name, *args, &block
  klass = name.to_s

  if klass.start_with?('_')
    tag klass, *args, &block
  elsif @_iv.context
    @_iv.context.send name, *args, &block
  else
    message = [
      %{HTML tag "#{name}" not found.},
      "Use this.#{name}() to call method in parent context",
      "or use tag(:#{name}, params, data) to add custom html node."
    ]
    raise NoMethodError.new(message.join(' '))
  end
end

Class Method Details

.define(name, empty: false) ⇒ Object

allows to add cusom tags if needed HtmlTag::Inbound.define :foo



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# File 'lib/html-tag/inbound.rb', line 17

def self.define name, empty: false
  if empty
    EMPTY_TAGS.add name
  end

  define_method name do |*args, &block|
    tag name, *args, &block
  end
end

Instance Method Details

#parent(&block) ⇒ Object Also known as: context, this

access parent context via parent / context / this h1 class: this.class_name



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# File 'lib/html-tag/inbound.rb', line 50

def parent &block
  unless @_iv.context
    raise 'Host scope is not available'
  end

  if block
    @_iv.context.instance_exec(&block)
  else
    @_iv.context
  end
end

#push(data = nil) ⇒ Object 



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# File 'lib/html-tag/inbound.rb', line 142

def push data = nil
  if block_given?
    data = yield
  end

  @_iv.data << data
end

#render ⇒ Object

export renderd data



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# File 'lib/html-tag/inbound.rb', line 65

def render
  @_iv.data
    .join('')
    .gsub(/\n+/, $/)
    #.gsub(/([\w>])[[:blank:]]+</, '\1<')
end

#tag(name, *args, &block) ⇒ Object

render single node



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# File 'lib/html-tag/inbound.rb', line 73

def tag name, *args, &block
  name, opt_hash, opt_data = _prepare_tag_params name, args

  tag_data = "%s%s<%s" % [_depth_new_line, _depth_spaces, name]

  # if tag params given, add them
  if opt_hash
    tag_data += ' '
    tag_data += opt_hash.inject([]) do |t, el|
      key, value = el

      if value.class == Hash
        for el in value
          t.push '%s-%s=%s' % [key, el[0], _escape_param(el[1])]
        end
      else
        if value.class == Array
          value = value.join(' ')
        end

        key = key.to_s.sub(/^data_/, 'data-')

        t.push '%s=%s' % [key, _escape_param(value)]
      end
      t
    end.join(' ')
  end

  unless EMPTY_TAGS.include?(name)
    tag_data += '>'
  end

  @_iv.data << tag_data

  # nested blocks
  if block
    @_iv.depth += 1
    node_count = @_iv.data.length

    block_data = if @_iv.context
      # HtmlTag scope
      instance_exec(self, &block)
    else
      # outbound scope
      block.call(self)
    end

    if block_data.class == String && node_count == @_iv.data.length
      @_iv.data << block_data
    end

    @_iv.depth -= 1
  end

  if EMPTY_TAGS.include?(name)
    @_iv.data << ' />'
  else
    unless opt_data
      @_iv.data << _depth_spaces
    end

    if opt_data.class == Array
      opt_data = opt_data.join('')\
    end

    @_iv.data << '%s</%s>%s' % [opt_data, name, _depth_new_line]
  end
end