Module: Slim::Optimizer

Included in:
Compiler
Defined in:
lib/slim/optimizer.rb

Overview

Given the following example:

html
  head
    meta name="description" content="This is a Slim Test, that's all"
    title Simple Test Title
  body
    - if logged_in?
      p 
        ` Welcome!
    - else
      p
        ` Please sign in.

When compiling the above code to be eval’d, Slim produces a compiled string that looks like:

buf = [];
_buf << "<html>";
_buf << "<head>";
_buf << "<meta name=\"description\" content=\"This is a Slim Test, that's all\"/>";
_buf << "<title>";
_buf << "Simple Test Title";
_buf << "</title>";
_buf << "</head>";
_buf << "<body>";
if logged_in?;
_buf << "<p>";
_buf << "Welcome!";
_buf << "</p>";
else;
_buf << "<p>";
_buf << "Please sign in.";
_buf << "</p>";
end;
_buf << "</body>";
_buf << "</html>";
_buf.join;

The optimized string after:

buf = [];
_buf << "<html><head><meta name=\"description\" content=\"This is a Slim Test, that's all\"/><title>Simple Test Title</title></head><body>";
if logged_in?;
_buf << "<p>Welcome!</p>";
else;
_buf << "<p>Please sign in.</p>";
end;
_buf << "</body></html>";
_buf.join;

Instance Method Summary collapse

Instance Method Details

#optimize ⇒ Object 



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# File 'lib/slim/optimizer.rb', line 52

def optimize
  @optimized = ""
  string = nil
  @_buffer.each do |line|
    if line =~ /^_buf << "(.+)"/
      string ||= ""
      string << $1
    else
      if string
        @optimized << "_buf << \"#{string}\";"
      end
      @optimized << line
      string = nil
    end
  end
  return nil
end