class Haml::Engine

puts output
output = haml_engine.render
haml_engine = Haml::Engine.new(template)
template = File.read(‘templates/really_cool_template.haml’)
For example:
new instance and calling {#render} to render the template.
It can be directly used by the user by creating a
This is the frontend for using Haml programmatically.

def def_method(object, name, *local_names)

Parameters:
  • local_names (Array) -- The names of the locals that can be passed to the proc
  • name (String, Symbol) -- The name of the method to define
  • object (Object, Module) -- The object on which to define the method 
def def_method(object, name, *local_names)
  method = object.is_a?(Module) ? :module_eval : :instance_eval
  object.send(method, "def #{name}(_haml_locals = {}); #{compiler.precompiled_with_ambles(local_names)}; end",
              @options[:filename], @options[:line])
end

def initialize(template, options = {})

Raises:
  • (Haml::Error) - if there's a Haml syntax error in the template

Parameters:
  • options ({Symbol => Object}) -- An options hash;
  • template (String) -- The Haml template 
def initialize(template, options = {})
  @options = Options.new(options)
  @template = check_haml_encoding(template) do |msg, line|
    raise Haml::Error.new(msg, line)
  end
  initialize_encoding options[:encoding]
  @parser   = @options.parser_class.new(@template, @options)
  @compiler = @options.compiler_class.new(@options)
  @compiler.compile(@parser.parse)
end

def initialize_encoding(given_value) 

def initialize_encoding(given_value)
end

def initialize_encoding(given_value) 

def initialize_encoding(given_value)
  unless given_value
    @options.encoding = Encoding.default_internal || @template.encoding
  end
end

def options_for_buffer 

def options_for_buffer
  @options.for_buffer
end

def render(scope = Object.new, locals = {}, &block)

Returns:
  • (String) - The rendered template

Parameters:
  • block (#to_proc) -- A block that can be yielded to within the template
  • locals ({Symbol => Object}) -- Local variables that will be made available
  • scope (Binding, Proc, Object) -- The context in which the template is evaluated 
def render(scope = Object.new, locals = {}, &block)
  parent = scope.instance_variable_defined?('@haml_buffer') ? scope.instance_variable_get('@haml_buffer') : nil
  buffer = Haml::Buffer.new(parent, @options.for_buffer)
  if scope.is_a?(Binding) || scope.is_a?(Proc)
    scope_object = eval("self", scope)
    scope = scope_object.instance_eval{binding} if block_given?
  else
    scope_object = scope
    scope = scope_object.instance_eval{binding}
  end
  set_locals(locals.merge(:_hamlout => buffer, :_erbout => buffer.buffer), scope, scope_object)
  scope_object.instance_eval do
    extend Haml::Helpers
    @haml_buffer = buffer
  end
  begin
    eval(@compiler.precompiled_with_return_value, scope, @options[:filename], @options[:line])
  rescue ::SyntaxError => e
    raise SyntaxError, e.message
  end
ensure
  # Get rid of the current buffer
  scope_object.instance_eval do
    @haml_buffer = buffer.upper if buffer
  end
end

def render_proc(scope = Object.new, *local_names)

Returns:
  • (Proc) - The proc that will run the template

Parameters:
  • local_names (Array) -- The names of the locals that can be passed to the proc
  • scope (Binding, Proc, Object) -- The context in which the template is evaluated 
def render_proc(scope = Object.new, *local_names)
  if scope.is_a?(Binding) || scope.is_a?(Proc)
    scope_object = eval("self", scope)
  else
    scope_object = scope
    scope = scope_object.instance_eval{binding}
  end
  begin
    eval("Proc.new { |*_haml_locals| _haml_locals = _haml_locals[0] || {};" +
         compiler.precompiled_with_ambles(local_names) + "}\n", scope, @options[:filename], @options[:line])
  rescue ::SyntaxError => e
    raise SyntaxError, e.message
  end
end

def set_locals(locals, scope, scope_object) 

def set_locals(locals, scope, scope_object)
  scope_object.send(:instance_variable_set, '@_haml_locals', locals)
  set_locals = locals.keys.map { |k| "#{k} = @_haml_locals[#{k.inspect}]" }.join("\n")
  eval(set_locals, scope)
end