Class: Jejune::Manager

Inherits:
Object
  • Object
show all
Includes:
Constants, JString, Utils
Defined in:
lib/jejune/manager.rb

Constant Summary

Constants included from JString

JString::DOUBLE_ESC, JString::ESC_RX

Constants included from Utils

Utils::JJS_EXTS

Constants included from Constants

Constants::BROWSERS, Constants::CATCH_TYPES, Constants::CODE, Constants::DEFAULT_EXT, Constants::DELIMS, Constants::EXPRESSION_TYPES, Constants::FUNCTION_TYPES, Constants::OPEN_DELIM, Constants::OPERATOR_PRECEDENCE, Constants::PROPERTY_DEFINITION_TYPES, Constants::PROPERTY_TYPES

Instance Attribute Summary collapse

Attributes included from JString

#tab_width

Instance Method Summary collapse

Methods included from JString

#collapse, #expand_tabs, #jstring, #outdent, #quote, #split_words, #string_value, #utf8

Methods included from Utils

ArgumentError, find_in_directory, find_in_path_list, jejune_file?, parse_ext_list

Constructor Details

#initialize(*args) ⇒ Manager

Returns a new instance of Manager.



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# File 'lib/jejune/manager.rb', line 38

def initialize( *args )
  options = {}
  args.last.is_a?( Hash ) and options.update( args.pop )
  @root_input = args.shift
  
  @data_directory = File.expand_path( '~/.jejune' )
  test( ?d, @data_directory ) or Dir.mkdir( @data_directory )
  @cache_directory = File.join( @data_directory, 'cache' )
  test( ?d, @cache_directory ) or Dir.mkdir( @cache_directory )
  
  @input       = nil
  @input_stack = []
  
  @load_path  = options.fetch( :load_path, [] )
  @load_path  = [ @load_path ].flatten
  @load_path.compact!
  
  @loaded_files     = {}
  @translator       = Translator.new( self )
  @browser          = options[ :browser ]
  @location_markers = options.fetch( :location_markers, true )
  @macros           = options.fetch( :macros, {} )
  @verbose          = options.fetch( :verbose, false )
  @dependency_map   = {}
end

Instance Attribute Details

#browser ⇒ Object

Returns the value of attribute browser.



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# File 'lib/jejune/manager.rb', line 33

def browser
  @browser
end

#data_directory ⇒ Object (readonly)

Returns the value of attribute data_directory.



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# File 'lib/jejune/manager.rb', line 32

def data_directory
  @data_directory
end

#dependency_map ⇒ Object (readonly)

Returns the value of attribute dependency_map.



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# File 'lib/jejune/manager.rb', line 32

def dependency_map
  @dependency_map
end

#input ⇒ Object (readonly)

Returns the value of attribute input.



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# File 'lib/jejune/manager.rb', line 32

def input
  @input
end

#load_path ⇒ Object (readonly)

Returns the value of attribute load_path.



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# File 'lib/jejune/manager.rb', line 32

def load_path
  @load_path
end

#location_markers=(value) ⇒ Object

Sets the attribute location_markers

Parameters:

  • value —

    the value to set the attribute location_markers to.



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# File 'lib/jejune/manager.rb', line 33

def location_markers=(value)
  @location_markers = value
end

#macros ⇒ Object (readonly)

Returns the value of attribute macros.



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# File 'lib/jejune/manager.rb', line 32

def macros
  @macros
end

#root_input ⇒ Object

Returns the value of attribute root_input.



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# File 'lib/jejune/manager.rb', line 33

def root_input
  @root_input
end

#translator ⇒ Object (readonly)

Returns the value of attribute translator.



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# File 'lib/jejune/manager.rb', line 32

def translator
  @translator
end

#verbose ⇒ Object

Returns the value of attribute verbose.



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# File 'lib/jejune/manager.rb', line 33

def verbose
  @verbose
end

Instance Method Details

#add_dependency(path) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 229

def add_dependency( path )
  full_path = File.expand_path( path )
  @input and @input.dependencies.add( full_path )
  @input_stack.each { | f | f.dependencies.add( full_path ) }
end

#add_to_path(*directories) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 72

def add_to_path( *directories )
  directories = [ directories ].flatten!.map! { | i | i.to_s }
  @load_path.unshift( *directories )
end

#cache_file(path) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 110

def cache_file( path )
  id = MD5.hexdigest( File.expand_path( path ) << "\0" << @browser.to_s )
  File.join( @cache_directory, id )
end

#commit_dependencies(file, deps) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 217

def commit_dependencies( file, deps )
  @dependency_map[ file ] = deps.to_a
end

#compress(source, type = 'js') ⇒ Object 



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# File 'lib/jejune/manager.rb', line 198

def compress( source, type = 'js' )
  command = %W( yui-compressor --type #{ type } ).join( ' ' )
  Open3.popen3( command ) do | inp, out, err |
    inp.write source
    inp.close
    return out.read
  end
end

#define_macro(node) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 65

def define_macro( node )
  macro = Macro.new( self, node )
  @macros[ macro.name ] = macro
  @input and @input.macros[ macro.name ] = macro
  return macro
end

#expand_macro(name, *parameters) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 171

def expand_macro( name, *parameters )
  macro = @macros[ name.to_s ] or raise MacroNotFound.new( name.to_s )
  macro.expand( *parameters )
end

#find_library(name, system = false) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 102

def find_library( name, system = false )
  unless path = system ? find_path( name ) : find_relative( name )
    raise( "cannot locate file `#{ name }'" )
  end
  return path
end

#find_path(name, exts = DEFAULT_EXT) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 87

def find_path( name, exts = DEFAULT_EXT )
  find_in_path_list( @load_path, name, exts )
end

#find_relative(name, exts = DEFAULT_EXT) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 98

def find_relative( name, exts = DEFAULT_EXT )
  find_in_directory( @input ? @input.directory : File.expand_path( '.' ), name, exts )
end

#find_resource(name, ext, system = false) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 91

def find_resource( name, ext, system = false )
  unless path = system ? find_path( name, ext ) : find_relative( name, ext )
    raise( "cannot locate file `#{ name }' (exts = #{ ext })" )
  end
  return path
end

#include!(lib) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 160

def include!( lib )
  require!( lib, false )
end

#interpolate(blob, outdent = false) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 235

def interpolate( blob, outdent = false )
  segments = []
  
  s = SourceScanner.new(
    blob.data, :file => blob.file, :line => blob.line, :column => blob.data_column
  )
  indent = nil
  margin = true
  nlines = 0
  
  until s.eos?
    case
    when s.scan( /#(?:(\{)|([@%\$][\$\w]*))/ )
      if s[ 1 ]
        tks = s.lexer { | lx | lx.tokenize_until_balanced( LBRACE, RBRACE ) }
        tree = parse( tks, :source_name => blob.file )
        segments << [ ?c, translate( tree ) ]
      elsif variable = s[ 2 ]
        case variable[ 0 ]
        when ?$
          segments << [ ?c, variable ]
        when ?@
          variable.length > 1 or raise( "syntax error -- expected variable name: `#{ s.matched }'" )
          segments << [ ?c, 'this.' << variable[ 1, variable.length ] ]
        when ?%
          variable.length > 1 or raise( "syntax error -- expected variable name: `#{ s.matched }'" )
          segments << [ ?c, variable[ 1, variable.length ] ]
        else
          raise( "BUG: this shouldn't happen" )
        end
      else
        raise( "BUG: this shouldn't happen" )
      end
    when s.scan( /\r?\n(?:\s*\r?\n)* / )
      nl = s.matched
      nlines += nl.count( "\n" )
      
      if last = segments.last and last[ 0 ] == ?s
        last[ 1 ] << nl
      else
        segments << [ ?s, nl ]
      end
      
      if leading_space = s.check( /^\s*(?=(\S))/ )
        margin &&= ( s[ 1 ] == '|' )
        n = expand_tabs( leading_space ).length
        indent = indent ? n < indent ? n : indent : n
      end
    when s.scan( %r<(?: [^\\\r\n\#]+ | (?: \\ \\ )+ | \\ \r? \n | \\ . | \# (?! [\{\$@%] ))+>mx )
      if last = segments.last and last[ 0 ] == ?s
        last[ 1 ] << s.matched
      else
        segments << [ ?s, s.matched ]
      end
    else
      msg = "BUG: this shouldn't happen!\n"
      msg << ( '= ' * 30 ) << "\n"
      msg << blob.inspect << "\n"
      msg << ( '= ' * 30 ) << "\n"
      msg << s.inspect
      raise( msg )
    end
  end
  
  if outdent and nlines > 0
    if first = segments.first and first[ 0 ] == ?s
      first[ 1 ].sub!( /\A[ \t]*\r?\n/, '' )
      first.empty? and segments.shift
    end
    if last = segments.last and last[ 0 ] == ?s
      last[ 1 ].sub!( /\r?\n[ \t]*\z/, '' )
      last.empty? and segments.pop
    end
    
    for type, text in segments
      if type == ?s
        margin ? text.gsub!( /(\r?\n)[ \t]*\|[ \t]?/, '\1' ) :
          text.gsub!( /(\r?\n)([ \t]*)/ ) { $1 << $2[ indent, $2.length ].to_s }
      end
    end
  end
  
  case segments.length
  when 0 then %q("")
  when 1
    type, text = segments.first
    type == ?s ? jstring( text ) : "(#{ text }).toString()"
  else
    segments.map! { | type, text | type == ?s ? jstring( text ) : text.strip }
    %([#{ segments.join( ',' ) }].join(''))
  end
end

#load!(lib, system = false) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 164

def load!( lib, system = false )
  path = find_library( lib, system )
  @input and @input.dependencies.add( File.expand_path( path ) )
  log( "load! #{ path.inspect }" )
  jejune_file?( path ) ? load_file( path ) : File.read( path )
end

#load_file(path) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 119

def load_file( path )
  #$stderr.puts( "- loading #{ path } #{ File.basename( cache_file( File.expand_path( path ) ) ) }" )
  log( "cache check - #{ path }", 34 )
  full_path = File.expand_path( path )
  add_dependency( full_path )
  
  @loaded_files.fetch( full_path ) do
    cache  = cache_file( full_path )
    output = nil
    
    begin
      if test( ?f, cache ) and test( ?>, cache, path )
        data = Marshal.load( File.read( cache ) )
        for depend in data[ :dependencies ]
          unless test( ?f, depend ) and test( ?>, cache, depend )
            #$stderr.puts( "  old   < #{ depend }" )
            raise "no cache"
          end
        end
        
        data[ :macros ].each_value { | macro | macro.manager = self }
        @macros.update( data[ :macros ] )
        
        return( @loaded_files[ full_path ] = data[ :output ] )
      end
    rescue => e
      #$stderr.puts( e.inspect )
      # ignore
    end
    
    @loaded_files[ full_path ] = JJSFile.new( path, :manager => self, :cache_file => cache )
  end
end

#loaded?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jejune/manager.rb', line 115

def loaded?( path )
  @loaded_files.has_key?( File.expand_path( path ) )
end

#log(message, color = 33) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 328

def log( message, color = 33 )
  @verbose and $stderr.puts( "\e[#{ color }m#{ message }\e[0m" )
end

#parse(tokens, *args) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 207

def parse( tokens, *args )
  options = args.last.is_a?( Hash ) ? args.pop : {}
  rule = args.pop || options[ :rule ] || :program
  
  stream = RewriteStream.new( tokens, options )
  adaptor = RewriteAdaptor.new( stream )
  parser = Parser.new( stream, :adaptor => adaptor )
  parser.send( rule ).tree
end

#require!(lib, system = lib !~ /^[\.\/\~]/) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 153

def require!( lib, system = lib !~ /^[\.\/\~]/ )
  path = find_library( lib, system )
  @input and @input.dependencies.add( File.expand_path( path ) )
  log( "require! #{ path.inspect }" )
  jejune_file?( path ) ? loaded?( path ) ? nil : load_file( path ) : File.read( path )
end

#set_root_file(file, options = {}) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 77

def set_root_file( file, options = {} )
  options[ :manager ] = self
  @root_input         = JJSFile.new( file, options )
end

#set_root_source(source, options = {}) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 82

def set_root_source( source, options = {} )
  options[ :manager ] = self
  @root_input         = JJSSource.new( source, options )
end

#translate(input = @root_input, options = nil) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 176

def translate( input = @root_input, options = nil )
  case input
  when RewriteTree
    @translator.translate( input )
  when JJSInput
    log( "translating #{ input.path }" )
    with_input( input ) do
      @translator.translate( input.tree )
    end
  when IO, ARGF
    options ||= {}
    options[ :manager ] = self
    input = JJSFile.new( input, options )
    translate( input )
  when String
    options ||= {}
    options[ :manager ] = self
    input = JJSSource.new( input, options )
    translate( input )
  end
end

#with_input(input) ⇒ Object 



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# File 'lib/jejune/manager.rb', line 221

def with_input( input )
  @input_stack.push( @input ) if @input
  @input = input
  yield self
ensure
  @input = @input_stack.pop
end