Method: Haml::Helpers#capture_haml

Defined in:
lib/haml/helpers.rb

#capture_haml(*args) {|args| ... }

Captures the result of a block of Haml code, gets rid of the excess indentation, and returns it as a string. For example, after the following,

.foo
  - foo = capture_haml(13) do |a|
    %p= a

the local variable foo would be assigned to "<p>13</p>\n".

Parameters:

  • args (Array) —

    Arguments to pass into the block

Yields:

  • (args) —

    A block of Haml code that will be converted to a string

Yield Parameters:

  • args (Array) —

    args



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# File 'lib/haml/helpers.rb', line 362

def capture_haml(*args, &block)
  buffer = eval('if defined? _hamlout then _hamlout else nil end', block.binding) || haml_buffer
  with_haml_buffer(buffer) do
    position = haml_buffer.buffer.length

    haml_buffer.capture_position = position
    block.call(*args)

    captured = haml_buffer.buffer.slice!(position..-1)
    return captured if haml_buffer.options[:ugly]
    # Note that the "reject" is needed for rbx 1.2.4, which includes empty
    # strings in the returned array when splitting by /^/.
    captured = captured.split(/^/).reject {|x| x == ""}

    min_tabs = nil
    captured.each do |line|
      tabs = line.index(/[^ ]/) || line.length
      min_tabs ||= tabs
      min_tabs = min_tabs > tabs ? tabs : min_tabs
    end

    captured.map do |line|
      line[min_tabs..-1]
    end.join
  end
ensure
  haml_buffer.capture_position = nil
end