Class: Synvert::Core::Engine::Erubis

Inherits:
Erubis::Eruby
  • Object
show all
Defined in:
lib/synvert/core/engine/erb.rb

Overview

borrowed from rails

Constant Summary collapse

BLOCK_EXPR =
/\s+(do|\{)(\s*\|[^|]*\|)?\s*\Z/

Instance Method Summary collapse

Instance Method Details

#add_expr(src, code, indicator) ⇒ Object

Erubis toggles <%= and <%== behavior when escaping is enabled. We override to always treat <%== as escaped.


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# File 'lib/synvert/core/engine/erb.rb', line 81

def add_expr(src, code, indicator)
  case indicator
  when '=='
    add_expr_escaped(src, code)
  else
    super
  end
end

#add_expr_escaped(src, code) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 101

def add_expr_escaped(src, code)
  flush_newline_if_pending(src)
  if code =~ BLOCK_EXPR
    src << "@output_buffer.safe_append= " << code << ERUBY_EXPR_SPLITTER
  else
    src << "@output_buffer.safe_append=(" << code << ");" << ERUBY_EXPR_SPLITTER
  end
end

#add_expr_literal(src, code) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 92

def add_expr_literal(src, code)
  flush_newline_if_pending(src)
  if code =~ BLOCK_EXPR
    src << '@output_buffer.append= ' << code << ERUBY_EXPR_SPLITTER
  else
    src << '@output_buffer.append=(' << code << ');' << ERUBY_EXPR_SPLITTER
  end
end

#add_postamble(src) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 126

def add_postamble(src)
  flush_newline_if_pending(src)
  src << '@output_buffer.to_s'
end

#add_preamble(src) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 59

def add_preamble(src)
  @newline_pending = 0
  src << "@output_buffer = output_buffer || ActionView::OutputBuffer.new;"
end

#add_stmt(src, code) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 110

def add_stmt(src, code)
  flush_newline_if_pending(src)
  if code != "\n" && code != ""
    index = if code =~ /\A(\s*)\r?\n/
              $1.length
            elsif code =~ /\A(\s+)/
              $1.end_with?(' ') ? $1.length - 1 : $1.length
            else
              0
            end
    code.insert(index, ERUBY_STMT_SPLITTER)
    code.insert(-1, ERUBY_STMT_SPLITTER[0...-1])
  end
  super
end

#add_text(src, text) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 64

def add_text(src, text)
  return if text.empty?

  if text == "\n"
    @newline_pending += 1
  else
    src << "@output_buffer.safe_append='"
    src << "\n" * @newline_pending if @newline_pending > 0
    src << escape_text(text)
    src << "'.freeze;"

    @newline_pending = 0
  end
end

#flush_newline_if_pending(src) ⇒ Object


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# File 'lib/synvert/core/engine/erb.rb', line 131

def flush_newline_if_pending(src)
  if @newline_pending > 0
    src << "@output_buffer.safe_append='#{"\n" * @newline_pending}'.freeze;"
    @newline_pending = 0
  end
end