Class: I18nliner::PreProcessors::ErbPreProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/i18nliner/pre_processors/erb_pre_processor.rb

Defined Under Namespace

Classes: Context, Helper, TBlock

Constant Summary collapse

ERB_EXPRESSION =

need to evaluate all expressions and statements, so we can correctly match the start/end of the ‘t` block expression (including nested ones)

/<%=\s*(?<content>.*?)\s*%>/
ERB_BLOCK_EXPRESSION = 
/
  \A
  <%=
  .*?
  (\sdo|\{)
  (\s*\|[^\|]+\|)?
  \s*
  %>
  \z
/xm
ERB_T_BLOCK_EXPRESSION = 
/
  \A
  <%=
  \s*
  t
  \s*?
  (\(\)\s*)?
  (\sdo|\{)
  \s*
  %>
  \z
/xm
ERB_STATEMENT = 
/\A<%[^=]/
ERB_END_STATEMENT = 
/
  \A
  <%
  \s*
  (end|\})
  (\W|%>\z)
/xm
ERB_TOKENIZER = 
/(<%.*?%>)/m

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source) ⇒ ErbPreProcessor

Returns a new instance of ErbPreProcessor.



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# File 'lib/i18nliner/pre_processors/erb_pre_processor.rb', line 316

def initialize(source)
  @source = source
end

Class Method Details

.process(source) ⇒ Object 



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# File 'lib/i18nliner/pre_processors/erb_pre_processor.rb', line 312

def self.process(source)
  new(source).result
end

Instance Method Details

#result ⇒ Object

Raises:



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# File 'lib/i18nliner/pre_processors/erb_pre_processor.rb', line 320

def result
  # the basic idea:
  # 1. whenever we find a t block expr, go till we find the end
  # 2. if we find another t block expr before the end, goto step 1
  # 3. capture any inline expressions along the way
  # 4. if we find *any* other statement or block expr, abort,
  #    since it's a no-go
  # TODO get line numbers for errors
  ctx = @source.split(ERB_TOKENIZER).inject(Context.new, :<<)
  raise MalformedErbError.new('possibly unterminated block expression') if ctx.parent
  ctx.result
end