Class: Hum::Engine

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

Overview

Hum

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Engine

Engine



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# File 'lib/hum/engine.rb', line 17

def initialize
end

Instance Method Details

#build_hashes ⇒ Object 



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# File 'lib/hum/engine.rb', line 129

def build_hashes
  
  i = 1
  
  #parse into an array of hashes
  @sass.each do |code| 
    hash = { 
      :line =>    i, 
      :select =>  _grab_select(code), 
      :tab =>     _grab_tab(code),
      :parent =>   nil,
      :kids =>    []
    }
    @tree << hash
    i += 1
  end
  
  #mark all parent selectors
  _check_for_parents
  
  #collect all kids
  _collect_kids
  
  #process all tags of parent selectors
  _process_parents
  
  #process all tabs
  _process_tabs
  
  #process all mixins by fixing the tabs and removing the mixin
  _process_mixins

  #process all special selectors, like pseudo elements
  _process_special
  
  @tree
end

#clean_sass ⇒ Object 



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# File 'lib/hum/engine.rb', line 112

def clean_sass
  #remove all property: value; pairs
  @sass.gsub!(/.*: .*/, "")
  
  #make sure tabs are two spaces
  @sass.gsub!(/\t/, "  ")
  
  #make sure nested direct descendant is normal
  @sass.gsub!(/\& > /, "")
  
  #make sure direct descendant is normal
  @sass.gsub!(/ > /, " ")
  
  #remove duplicate new lines
  @sass.gsub!(/\n+/, "\n")
end

#load(file) ⇒ Object 



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# File 'lib/hum/engine.rb', line 20

def load(file)
  #the array that holds the parsed CSS
  @tree = []
  
  @input_path = file
  
  #the name of the input file
  @input_name = File.basename(file)
  
  #read the input file
  @input_file = File.open(file, 'r')
  
  @directory = File.dirname(file)
  
  #the output path
  @output_path = File.expand_path(file).gsub(/\..*/, ".html")
  
  #the name of the output file
  @output_name = File.basename(@output_path)
end

#output_haml ⇒ Object 



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# File 'lib/hum/engine.rb', line 182

def output_haml
  return _output_haml
end

#output_html ⇒ Object 



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# File 'lib/hum/engine.rb', line 186

def output_html
  #convert HAML to HAML
  @html = Haml::Engine.new(@haml).render
  @html
end

#render_haml_tags ⇒ Object 



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# File 'lib/hum/engine.rb', line 167

def render_haml_tags
  #in each line
  @tree.each do |hash|
    hash[:haml] = []
    
    #for each selector
    hash[:select].each do |tag|
      
      #convert the tag to a HAML tag
      hash[:haml].push(_grab_haml_tag(tag))
    end         
  end
  @tree
end

#render_sass ⇒ Object 



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# File 'lib/hum/engine.rb', line 76

def render_sass
  opts = { :cache => false, :read_cache => true, :syntax => :scss }
  
  #read content
  content = @input_file.read
  
  #remove /**/ comments
  content.gsub!(/.*\/\*([\s\S]*?)\*\//, "")

  #remove // coments
  content.gsub!(/.*\/\/.*/, "")
  
  #remove @imports
  content.gsub!(/.*@import.*/, "")
  
  #if CSS render SASS
  if @input_name.match(/\.css/)
    @sass = Sass::CSS.new(content).render(:sass)

  #if SCSS convert to SASS
  elsif @input_name.match(/\.scss/)
    @sass = ::Sass::Engine.new(content, opts).to_tree.send("to_sass")

  #if sass keep as it
  elsif @input_name.match(/\.sass/)
    #doing this at the moment to make sure the sass is formatted correctly, as using sass-convert does some nifty formatting
    scss = ::Sass::Engine.new(content, {:cache => false, :read_cache => true, :syntax => :sass}).to_tree.send("to_scss")
    @sass = ::Sass::Engine.new(scss, opts).to_tree.send("to_sass")
    
  #if nothing then put error
  else
    puts "Hum only works with .scss, .sass and .css files.".bold
    exit 1
  end
end

#run ⇒ Object 



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# File 'lib/hum/engine.rb', line 41

def run
  run_haml
  
  #create the output file
  @output_file = File.open(@output_path, "w")
  
  #output the html
  @output_file.write(output_html)
  
  #close the input file
  @input_file.close()
  
  #close the output file
  @output_file.close()
  
  puts "updated #{@output_name}".bold
end

#run_haml ⇒ Object 



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# File 'lib/hum/engine.rb', line 59

def run_haml
  #render SASS from CSS
  render_sass
  
  #remove property value pairs
  clean_sass
  
  #parse CSS into an array of hashes
  build_hashes
  
  #generate HAML tags
  render_haml_tags
  
  #generate HAML
  output_haml
end