Class: SC::Builder::SplitCSS

Inherits:
Base show all
Defined in:
lib/sproutcore/builders/split.rb

Overview

This builder is used to split packed CSS files, ironically enough, into smaller CSS files. This is due to an IE limitation of ~4096 maximum selectors per file.

This is a bit hacky, but we add additional manifest entries even though, technically, the manifest generation process is finished. We do this because we have NO WAY of knowing how many selectors there will be until CSS is both built and packed.

The static HTML helper makes sure to build! the packed stylesheet entries first so that this rule has been processed. After that, it looks for [:split_entries] on the packed entry.

Instance Attribute Summary

Attributes inherited from Base

#entry

Instance Method Summary collapse

Methods inherited from Base

build, #initialize, #joinlines, #read, #readlines, #replace_static_url, #sc_static_match, #static_url, #writeline, #writelinebinary, #writelines

Constructor Details

This class inherits a constructor from SC::Builder::Base

Instance Method Details

#build(dst_path) ⇒ Object 



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# File 'lib/sproutcore/builders/split.rb', line 23

def build(dst_path)
  e = entry.source_entry
  e.stage!
  
  src = File.read(entry[:staging_path])
  files = SC::Helpers::SplitCSS.split_css src
  
  if files.length > 1 and entry.target.config[:split_css_for_ie]
    entry[:split_entries] = []
    entry[:is_split] = true
    entry.hide!
    
  
    files.each_index {|index|
      name = entry[:filename].sub /\.css$/, ""
      
      path = dst_path.sub /\.css$/, ""
      path = "#{path}-#{index}.css"
  
      writeline path, files[index]
  
      # Is this hacky? Yes. But IE is stupid. So we have to modify the manifest
      # very late, because we don't know the 
      resource_name = "#{name}-#{index}.css"
      split_entry = entry.manifest.add_composite resource_name,
        :staging_path => path,
        :build_path => path,
        :source_entries => [entry],
        :url => [entry.manifest[:url_root], resource_name].join("/"),
        :timestamp => entry[:timestamp]

      entry[:split_entries] << split_entry
    }
  else
    e.build!
  end
end