Class: Haml2Handlebars::AttributesParser

Inherits:
Object
  • Object
show all
Defined in:
lib/haml2handlebars/attributes_parser.rb

Defined Under Namespace

Classes: DynamicAttributes

Constant Summary collapse

CONTENTS = 
/^, \{(.*)\}$/
ROCKET = 
'\=\>'
SYMBOL_TEXT = 
'[\w_]+'
STRING_TEXT = 
'[\w_-]+'
SYMBOL_KEY = 
/^(?:\:(#{SYMBOL_TEXT})\s*#{ROCKET}|(#{SYMBOL_TEXT}):)\s*/
STRING_KEY = 
/^(?:'(#{STRING_TEXT})'|"(#{STRING_TEXT})")\s*#{ROCKET}\s*/
SYMBOL_VALUE = 
/^:(#{SYMBOL_TEXT})\s*/
STRING_VALUE = 
/^(?:"([^"]+)"|'([^']+)')\s*/
STRING_INTERPOLATION = 
/^("[^\\]*)#\{/

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes) ⇒ AttributesParser

Returns a new instance of AttributesParser.



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# File 'lib/haml2handlebars/attributes_parser.rb', line 6

def initialize attributes
  @attributes = attributes
  @pairs = []
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/haml2handlebars/attributes_parser.rb', line 10

def attributes
  @attributes
end

#pairs ⇒ Object (readonly)

Returns the value of attribute pairs.



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# File 'lib/haml2handlebars/attributes_parser.rb', line 10

def pairs
  @pairs
end

Class Method Details

.hash_to_html(hash) ⇒ Object 



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# File 'lib/haml2handlebars/attributes_parser.rb', line 60

def self.hash_to_html hash
  hash.each_pair.map do |key, value|
    " #{key}='#{value.gsub("'", ''')}'"
  end.join('')
end

Instance Method Details

#dynamic? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/haml2handlebars/attributes_parser.rb', line 56

def dynamic?
  @dynamic
end

#parse! ⇒ Object 



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# File 'lib/haml2handlebars/attributes_parser.rb', line 25

def parse!
  rest = attributes.strip.scan(CONTENTS).flatten.first
  begin
    while rest and not(rest.empty?)
      if rest =~ SYMBOL_KEY
        key = $1 || $2
        rest.gsub! SYMBOL_KEY, ''
      elsif rest =~ STRING_KEY
        key = $1 || $2
        rest.gsub! STRING_KEY, ''
      else
        raise DynamicAttributes
      end
    
      if rest =~ STRING_VALUE
        value = $1
        raise DynamicAttributes if rest =~ STRING_INTERPOLATION
      elsif rest =~ SYMBOL_VALUE
        value = $1 || $2
      else
        raise DynamicAttributes
      end
    
      pairs << [key, value]
    end
  rescue DynamicAttributes
    @dynamic = true
    return
  end
end

#to_html ⇒ Object 



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# File 'lib/haml2handlebars/attributes_parser.rb', line 66

def to_html
  if attributes.strip.empty?
    return ''
  else
    parse!
    if dynamic?
      hash = attributes.scan(CONTENTS).flatten.first
      hash.strip!
      hash.gsub! /\s*,$/, ''
      hash.gsub! /\#{(\w+)}/, "{{\\1}}"
      hash = eval "{#{hash}}"
      " #{hash.keys.first}=\"#{hash.values.first}\""
    else
      pairs.map do |(key, value)|
        "#{key}='#{value.gsub("'", '&#x27;')}'"
      end.join('')
    end
  end
end