Class: ActionView::Template::Handlers::ERB

Inherits:
Object
  • Object
show all
Defined in:
lib/action_view/template/handlers/erb.rb,
lib/action_view/template/handlers/erb/erubi.rb

Defined Under Namespace

Classes: Erubi

Constant Summary collapse

ENCODING_TAG = 
Regexp.new("\\A(<%#{ENCODING_FLAG}-?%>)[ \\t]*")
LocationParsingError =

:nodoc:

Class.new(StandardError)

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.call(template, source) ⇒ Object 



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# File 'lib/action_view/template/handlers/erb.rb', line 29

def self.call(template, source)
  new.call(template, source)
end

Instance Method Details

#call(template, source) ⇒ Object 



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# File 'lib/action_view/template/handlers/erb.rb', line 63

def call(template, source)
  # First, convert to BINARY, so in case the encoding is
  # wrong, we can still find an encoding tag
  # (<%# encoding %>) inside the String using a regular
  # expression
  template_source = source.b

  erb = template_source.gsub(ENCODING_TAG, "")
  encoding = $2

  erb.force_encoding valid_encoding(source.dup, encoding)

  # Always make sure we return a String in the default_internal
  erb.encode!

  # Strip trailing newlines from the template if enabled
  erb.chomp! if strip_trailing_newlines

  options = {
    escape: (self.class.escape_ignore_list.include? template.type),
    trim: (self.class.erb_trim_mode == "-")
  }

  if ActionView::Base.annotate_rendered_view_with_filenames && template.format == :html
    options[:preamble] = "@output_buffer.safe_append='<!-- BEGIN #{template.short_identifier} -->';"
    options[:postamble] = "@output_buffer.safe_append='<!-- END #{template.short_identifier} -->';@output_buffer"
  end

  self.class.erb_implementation.new(erb, options).src
end

#handles_encoding? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/action_view/template/handlers/erb.rb', line 37

def handles_encoding?
  true
end

#supports_streaming? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/action_view/template/handlers/erb.rb', line 33

def supports_streaming?
  true
end

#translate_location(spot, backtrace_location, source) ⇒ Object

Translate an error location returned by ErrorHighlight to the correct source location inside the template.



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# File 'lib/action_view/template/handlers/erb.rb', line 43

def translate_location(spot, backtrace_location, source)
  # Tokenize the source line
  source_lines = source.lines
  return nil if source_lines.size < backtrace_location.lineno
  tokens = ::ERB::Util.tokenize(source_lines[backtrace_location.lineno - 1])
  new_first_column = find_offset(spot[:snippet], tokens, spot[:first_column])
  lineno_delta = spot[:first_lineno] - backtrace_location.lineno
  spot[:first_lineno] -= lineno_delta
  spot[:last_lineno] -= lineno_delta

  column_delta = spot[:first_column] - new_first_column
  spot[:first_column] -= column_delta
  spot[:last_column] -= column_delta
  spot[:script_lines] = source_lines

  spot
rescue NotImplementedError, LocationParsingError
  nil
end