Class: ERB::Compiler

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

Overview

:nodoc:

Defined Under Namespace

Classes: Buffer, PercentLine, Scanner, SimpleScanner, TrimScanner

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(trim_mode) ⇒ Compiler

Returns a new instance of Compiler.



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# File 'lib/erb.rb', line 640

def initialize(trim_mode)
  @percent, @trim_mode = prepare_trim_mode(trim_mode)
  @put_cmd = 'print'
  @insert_cmd = @put_cmd
  @pre_cmd = []
  @post_cmd = []
end

Instance Attribute Details

#insert_cmd ⇒ Object

Returns the value of attribute insert_cmd.



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# File 'lib/erb.rb', line 648

def insert_cmd
  @insert_cmd
end

#percent ⇒ Object (readonly)

Returns the value of attribute percent.



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# File 'lib/erb.rb', line 647

def percent
  @percent
end

#post_cmd ⇒ Object

Returns the value of attribute post_cmd.



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# File 'lib/erb.rb', line 648

def post_cmd
  @post_cmd
end

#pre_cmd ⇒ Object

Returns the value of attribute pre_cmd.



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# File 'lib/erb.rb', line 648

def pre_cmd
  @pre_cmd
end

#put_cmd ⇒ Object

Returns the value of attribute put_cmd.



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# File 'lib/erb.rb', line 648

def put_cmd
  @put_cmd
end

#trim_mode ⇒ Object (readonly)

Returns the value of attribute trim_mode.



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# File 'lib/erb.rb', line 647

def trim_mode
  @trim_mode
end

Instance Method Details

#compile(s) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/erb.rb', line 547

def compile(s)
  enc = s.encoding
  raise ArgumentError, "#{enc} is not ASCII compatible" if enc.dummy?
  s = s.dup.force_encoding("ASCII-8BIT") # don't use constant Enoding::ASCII_8BIT for miniruby
  enc = detect_magic_comment(s) || enc
  out = Buffer.new(self, enc)

  content = ''
  scanner = make_scanner(s)
  scanner.scan do |token|
    next if token.nil? 
    next if token == ''
	if scanner.stag.nil?
	  case token
      when PercentLine
 out.push("#{@put_cmd} #{content_dump(content)}") if content.size > 0
 content = ''
        out.push(token.to_s)
        out.cr
	  when :cr
 out.cr
	  when '<%', '<%=', '<%#'
 scanner.stag = token
 out.push("#{@put_cmd} #{content_dump(content)}") if content.size > 0
 content = ''
	  when "\n"
 content << "\n"
 out.push("#{@put_cmd} #{content_dump(content)}")
 content = ''
	  when '<%%'
 content << '<%'
	  else
 content << token
	  end
	else
	  case token
	  when '%>'
 case scanner.stag
 when '<%'
   if content[-1] == ?\n
		content.chop!
		out.push(content)
		out.cr
   else
		out.push(content)
   end
 when '<%='
   out.push("#{@insert_cmd}((#{content}).to_s)")
 when '<%#'
   # out.push("# #{content_dump(content)}")
 end
 scanner.stag = nil
 content = ''
	  when '%%>'
 content << '%>'
	  else
 content << token
	  end
	end
  end
  out.push("#{@put_cmd} #{content_dump(content)}") if content.size > 0
  out.close
  return out.script, enc
end

#content_dump(s) ⇒ Object 



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# File 'lib/erb.rb', line 538

def content_dump(s)
  n = s.count("\n")
  if n > 0
    s.dump + "\n" * n
  else
    s.dump
  end
end

#make_scanner(src) ⇒ Object 



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# File 'lib/erb.rb', line 636

def make_scanner(src)
  Scanner.make_scanner(src, @trim_mode, @percent)
end

#prepare_trim_mode(mode) ⇒ Object 



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# File 'lib/erb.rb', line 612

def prepare_trim_mode(mode)
  case mode
  when 1
	return [false, '>']
  when 2
	return [false, '<>']
  when 0
	return [false, nil]
  when String
	perc = mode.include?('%')
	if mode.include?('-')
	  return [perc, '-']
	elsif mode.include?('<>')
	  return [perc, '<>']
	elsif mode.include?('>')
	  return [perc, '>']
	else
	  [perc, nil]
	end
  else
	return [false, nil]
  end
end