Class: Slim::Interpolation Private

Inherits:
Filter
  • Object
show all
Defined in:
lib/slim/interpolation.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Perform interpolation of #var_name

Instance Method Summary collapse

Methods inherited from Filter

#on_slim_attrs, #on_slim_control, #on_slim_output, #on_slim_tag, #tmp_var

Instance Method Details

#on_slim_text(string) ⇒ Array

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Handle text expression ‘[:slim, :text, string]`

Parameters:

  • string (String) —

    Static text

Returns:

  • (Array) —

    Compiled temple expression



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# File 'lib/slim/interpolation.rb', line 9

def on_slim_text(string)
  # Interpolate variables in text (#{variable}).
  # Split the text into multiple dynamic and static parts.
  block = [:multi]
  until string.empty?
    case string
    when /^\\\#\{/
      # Escaped interpolation
      block << [:static, '#{']
      string = $'
    when /^\#\{/
      # Interpolation
      string, code = parse_expression($')
      block << [:slim, :output, true, code, [:multi]]
    when /^([^\#]+|\#)/
      # Static text
      block << [:static, $&]
      string = $'
    end
  end
  block
end

#parse_expression(string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/slim/interpolation.rb', line 32

def parse_expression(string)
  stack, code = [], ''

  until string.empty?
    if stack.empty? && string =~ /^\}/
      # Stack is empty, this means we are finished
      # if the next character is a closing bracket
      string.slice!(0)
      break
    elsif string =~ Parser::DELIMITER_REGEX
      # Delimiter found, push it on the stack
      stack << Parser::DELIMITERS[$1]
      code << string.slice!(0)
    elsif string =~ Parser::CLOSE_DELIMITER_REGEX
      # Closing delimiter found, pop it from the stack if everything is ok
      raise "Text interpolation: Unexpected closing #{$1}" if stack.empty?
      raise "Text interpolation: Expected closing #{stack.last}" if stack.last != $1
      code << string.slice!(0)
      stack.pop
    else
      code << string.slice!(0)
    end
  end

  return string, code
end