1 files changed, 296 insertions, 296 deletions
diff --git a/lib/coderay/helpers/plugin.rb b/lib/coderay/helpers/plugin.rb
index 3383828..7e90279 100644
--- a/lib/coderay/helpers/plugin.rb
+++ b/lib/coderay/helpers/plugin.rb
@@ -3,310 +3,310 @@
 # $Id$
 #
 # A simple subclass plugin system.
-# 
-#	Example:		
-#		class Generators < PluginHost
-#			plugin_path 'app/generators'
-#		end
-#		
-#	  class Generator
-#	  	extend Plugin
-#	  	PLUGIN_HOST = Generators
-#	  end
-#   
-#	  class FancyGenerator < Generator
-#	  	register_for :fancy
-#	  end
 #
-#	  Generators[:fancy]  #-> FancyGenerator
-#	  # or
-#	  require_plugin 'Generators/fancy'
+#  Example:
+#    class Generators < PluginHost
+#      plugin_path 'app/generators'
+#    end
+#    
+#    class Generator
+#      extend Plugin
+#      PLUGIN_HOST = Generators
+#    end
+#    
+#    class FancyGenerator < Generator
+#      register_for :fancy
+#    end
+#
+#    Generators[:fancy]  #-> FancyGenerator
+#    # or
+#    require_plugin 'Generators/fancy'
 module PluginHost
 
-	# Raised if Encoders::[] fails because:
-	# * a file could not be found
-	# * the requested Encoder is not registered
-	PluginNotFound = Class.new Exception
-	HostNotFound = Class.new Exception
-
-	PLUGIN_HOSTS = []
-	PLUGIN_HOSTS_BY_ID = {}  # dummy hash
-
-	# Loads all plugins using all_plugin_names and load.
-	def load_all
-		for plugin in all_plugin_names
-			load plugin
-		end
-	end
-
-	# Returns the Plugin for +id+.
-	# 
-	# Example:
-	#  yaml_plugin = MyPluginHost[:yaml]
-	def [] id, *args, &blk
-		plugin = validate_id(id)
-		begin
-			plugin = plugin_hash.[] plugin, *args, &blk
-		end while plugin.is_a? Symbol
-		plugin
-	end
-
-	# Alias for +[]+.
-	alias load []
-
-	def require_helper plugin_id, helper_name
-		path = path_to File.join(plugin_id, helper_name)
-		require path
-	end		
-
-	class << self
-
-		# Adds the module/class to the PLUGIN_HOSTS list.
-		def extended mod
-			PLUGIN_HOSTS << mod
-		end
-
-		# Warns you that you should not #include this module.
-		def included mod
-			warn "#{name} should not be included. Use extend."
-		end
-
-		# Find the PluginHost for host_id.
-		def host_by_id host_id
-			unless PLUGIN_HOSTS_BY_ID.default_proc
-				ph = Hash.new do |h, a_host_id|
-					for host in PLUGIN_HOSTS
-						h[host.host_id] = host
-					end
-					h.fetch a_host_id, nil
-				end				
-				PLUGIN_HOSTS_BY_ID.replace ph
-			end
-			PLUGIN_HOSTS_BY_ID[host_id]
-		end
-
-	end
-	
-	# The path where the plugins can be found.
-	def plugin_path *args
-		unless args.empty?
-			@plugin_path = File.expand_path File.join(*args)
-			load_map
-		end
-		@plugin_path
-	end
-
-	# The host's ID.
-	#
-	# If PLUGIN_HOST_ID is not set, it is simply the class name.
-	def host_id
-		if self.const_defined? :PLUGIN_HOST_ID
-			self::PLUGIN_HOST_ID
-		else
-			name
-		end
-	end
-
-	# Map a plugin_id to another.
-	#
-	# Usage: Put this in a file plugin_path/_map.rb.
-	#
-	#  class MyColorHost < PluginHost
-	#    map :navy => :dark_blue,
-	#      :maroon => :brown,
-	#      :luna => :moon
-	#  end
-	def map hash
-		for from, to in hash
-			from = validate_id from
-			to = validate_id to
-			plugin_hash[from] = to unless plugin_hash.has_key? from
-		end
-	end
-	
-	# Define the default plugin to use when no plugin is found
-	# for a given id.
-	#
-	# See also map.
-	# 
-	#  class MyColorHost < PluginHost
-	#    map :navy => :dark_blue
-	#    default :gray
-	#  end
-	def default id
-		id = validate_id id
-		plugin_hash[nil] = id
-	end
-	
-	# Every plugin must register itself for one or more
-	# +ids+ by calling register_for, which calls this method.
-	#
-	# See Plugin#register_for.
-	def register plugin, *ids
-		for id in ids
-			unless id.is_a? Symbol
-				raise ArgumentError,
-					"id must be a Symbol, but it was a #{id.class}" 
-			end
-			plugin_hash[validate_id(id)] = plugin
-		end
-	end
-
-	# A Hash of plugion_id => Plugin pairs.
-	def plugin_hash
-		@plugin_hash ||= create_plugin_hash
-	end
-
-	# Returns an array of all .rb files in the plugin path.
-	# 
-	# The extension .rb is not included.
-	def all_plugin_names
-		Dir[path_to('*')].select do |file|
-			File.basename(file)[/^(?!_)\w+\.rb$/]
-		end.map do |file|
-			File.basename file, '.rb'
-		end
-	end
+  # Raised if Encoders::[] fails because:
+  # * a file could not be found
+  # * the requested Encoder is not registered
+  PluginNotFound = Class.new Exception
+  HostNotFound = Class.new Exception
+
+  PLUGIN_HOSTS = []
+  PLUGIN_HOSTS_BY_ID = {}  # dummy hash
+
+  # Loads all plugins using all_plugin_names and load.
+  def load_all
+    for plugin in all_plugin_names
+      load plugin
+    end
+  end
+
+  # Returns the Plugin for +id+.
+  #
+  # Example:
+  #  yaml_plugin = MyPluginHost[:yaml]
+  def [] id, *args, &blk
+    plugin = validate_id(id)
+    begin
+      plugin = plugin_hash.[] plugin, *args, &blk
+    end while plugin.is_a? Symbol
+    plugin
+  end
+
+  # Alias for +[]+.
+  alias load []
+
+  def require_helper plugin_id, helper_name
+    path = path_to File.join(plugin_id, helper_name)
+    require path
+  end
+
+  class << self
+
+    # Adds the module/class to the PLUGIN_HOSTS list.
+    def extended mod
+      PLUGIN_HOSTS << mod
+    end
+
+    # Warns you that you should not #include this module.
+    def included mod
+      warn "#{name} should not be included. Use extend."
+    end
+
+    # Find the PluginHost for host_id.
+    def host_by_id host_id
+      unless PLUGIN_HOSTS_BY_ID.default_proc
+        ph = Hash.new do |h, a_host_id|
+          for host in PLUGIN_HOSTS
+            h[host.host_id] = host
+          end
+          h.fetch a_host_id, nil
+        end
+        PLUGIN_HOSTS_BY_ID.replace ph
+      end
+      PLUGIN_HOSTS_BY_ID[host_id]
+    end
+
+  end
+
+  # The path where the plugins can be found.
+  def plugin_path *args
+    unless args.empty?
+      @plugin_path = File.expand_path File.join(*args)
+      load_map
+    end
+    @plugin_path
+  end
+
+  # The host's ID.
+  #
+  # If PLUGIN_HOST_ID is not set, it is simply the class name.
+  def host_id
+    if self.const_defined? :PLUGIN_HOST_ID
+      self::PLUGIN_HOST_ID
+    else
+      name
+    end
+  end
+
+  # Map a plugin_id to another.
+  #
+  # Usage: Put this in a file plugin_path/_map.rb.
+  #
+  #  class MyColorHost < PluginHost
+  #    map :navy => :dark_blue,
+  #      :maroon => :brown,
+  #      :luna => :moon
+  #  end
+  def map hash
+    for from, to in hash
+      from = validate_id from
+      to = validate_id to
+      plugin_hash[from] = to unless plugin_hash.has_key? from
+    end
+  end
+
+  # Define the default plugin to use when no plugin is found
+  # for a given id.
+  #
+  # See also map.
+  #
+  #  class MyColorHost < PluginHost
+  #    map :navy => :dark_blue
+  #    default :gray
+  #  end
+  def default id
+    id = validate_id id
+    plugin_hash[nil] = id
+  end
+
+  # Every plugin must register itself for one or more
+  # +ids+ by calling register_for, which calls this method.
+  #
+  # See Plugin#register_for.
+  def register plugin, *ids
+    for id in ids
+      unless id.is_a? Symbol
+        raise ArgumentError,
+          "id must be a Symbol, but it was a #{id.class}"
+      end
+      plugin_hash[validate_id(id)] = plugin
+    end
+  end
+
+  # A Hash of plugion_id => Plugin pairs.
+  def plugin_hash
+    @plugin_hash ||= create_plugin_hash
+  end
+
+  # Returns an array of all .rb files in the plugin path.
+  #
+  # The extension .rb is not included.
+  def all_plugin_names
+    Dir[path_to('*')].select do |file|
+      File.basename(file)[/^(?!_)\w+\.rb$/]
+    end.map do |file|
+      File.basename file, '.rb'
+    end
+  end
 
 protected
-	# Created a new plugin list and stores it to @plugin_hash.
-	def create_plugin_hash
-		@plugin_hash =
-			Hash.new do |h, plugin_id|
-				id = validate_id(plugin_id)
-				path = path_to id
-				begin
-					require path
-				rescue LoadError => boom
-					if h.has_key? nil  # default plugin
-						h[id] = h[nil]
-					else
-						raise PluginNotFound, 'Could not load plugin %p: %s' % [id, boom]
-					end
-				else
-					# Plugin should have registered by now
-					unless h.has_key? id
-						raise PluginNotFound,
-							"No #{self.name} plugin for #{id.inspect} found in #{path}."
-					end
-				end
-				h[id]
-			end
-	end
-
-	# Makes a map of all loaded scanners.
-	def inspect
-		map = plugin_hash.dup
-		map.each do |id, plugin|
-			map[id] = plugin.name[/(?>[\w_]+)$/]
-		end
-		map.inspect
-	end
-
-	# Loads the map file (see map).
-	#
-	# This is done automatically when plugin_path is called.
-	def load_map
-		mapfile = path_to '_map'
-		if File.exist? mapfile
-			require mapfile
-		elsif $DEBUG
-			warn 'no _map.rb found for %s' % name
-		end
-	end
-
-	# Returns the Plugin for +id+.
-	# Use it like Hash#fetch.
-	# 
-	# Example:
-	#  yaml_plugin = MyPluginHost[:yaml, :default]
-	def fetch id, *args, &blk
-		plugin_hash.fetch validate_id(id), *args, &blk
-	end
-
-	# Returns the expected path to the plugin file for the given id.
-	def path_to plugin_id
-		File.join plugin_path, "#{plugin_id}.rb"
-	end
-
-	# Converts +id+ to a Symbol if it is a String,
-	# or returns +id+ if it already is a Symbol.
-	#
-	# Raises +ArgumentError+ for all other objects, or if the
-	# given String includes non-alphanumeric characters (\W).
-	def validate_id id
-		if id.is_a? Symbol or id.nil?
-			id
-		elsif id.is_a? String
-			if id[/\w+/] == id
-				id.to_sym
-			else
-				raise ArgumentError, "Invalid id: '#{id}' given."
-			end
-		else
-			raise ArgumentError,
-				"String or Symbol expected, but #{id.class} given."
-		end
-	end
+  # Created a new plugin list and stores it to @plugin_hash.
+  def create_plugin_hash
+    @plugin_hash =
+      Hash.new do |h, plugin_id|
+        id = validate_id(plugin_id)
+        path = path_to id
+        begin
+          require path
+        rescue LoadError => boom
+          if h.has_key? nil  # default plugin
+            h[id] = h[nil]
+          else
+            raise PluginNotFound, 'Could not load plugin %p: %s' % [id, boom]
+          end
+        else
+          # Plugin should have registered by now
+          unless h.has_key? id
+            raise PluginNotFound,
+              "No #{self.name} plugin for #{id.inspect} found in #{path}."
+          end
+        end
+        h[id]
+      end
+  end
+
+  # Makes a map of all loaded scanners.
+  def inspect
+    map = plugin_hash.dup
+    map.each do |id, plugin|
+      map[id] = plugin.name[/(?>[\w_]+)$/]
+    end
+    map.inspect
+  end
+
+  # Loads the map file (see map).
+  #
+  # This is done automatically when plugin_path is called.
+  def load_map
+    mapfile = path_to '_map'
+    if File.exist? mapfile
+      require mapfile
+    elsif $DEBUG
+      warn 'no _map.rb found for %s' % name
+    end
+  end
+
+  # Returns the Plugin for +id+.
+  # Use it like Hash#fetch.
+  #
+  # Example:
+  #  yaml_plugin = MyPluginHost[:yaml, :default]
+  def fetch id, *args, &blk
+    plugin_hash.fetch validate_id(id), *args, &blk
+  end
+
+  # Returns the expected path to the plugin file for the given id.
+  def path_to plugin_id
+    File.join plugin_path, "#{plugin_id}.rb"
+  end
+
+  # Converts +id+ to a Symbol if it is a String,
+  # or returns +id+ if it already is a Symbol.
+  #
+  # Raises +ArgumentError+ for all other objects, or if the
+  # given String includes non-alphanumeric characters (\W).
+  def validate_id id
+    if id.is_a? Symbol or id.nil?
+      id
+    elsif id.is_a? String
+      if id[/\w+/] == id
+        id.to_sym
+      else
+        raise ArgumentError, "Invalid id: '#{id}' given."
+      end
+    else
+      raise ArgumentError,
+        "String or Symbol expected, but #{id.class} given."
+    end
+  end
 
 end
 
 
 # = Plugin
-# 
-#	Plugins have to include this module.
 #
-#	IMPORTANT: use extend for this module.
+#  Plugins have to include this module.
+#
+#  IMPORTANT: use extend for this module.
 #
-#	Example: see PluginHost.
+#  Example: see PluginHost.
 module Plugin
 
-	def included mod
-		warn "#{name} should not be included. Use extend."
-	end
-
-	# Register this class for the given langs.
-	# Example:
-	#   class MyPlugin < PluginHost::BaseClass
-	#     register_for :my_id
-	#     ...
-	#   end
-	#
-	# See PluginHost.register.
-	def register_for *ids
-		plugin_host.register self, *ids
-	end
-
-	# The host for this Plugin class.
-	def plugin_host host = nil
-		if host and not host.is_a? PluginHost
-			raise ArgumentError,
-				"PluginHost expected, but #{host.class} given."
-		end
-		self.const_set :PLUGIN_HOST, host if host
-		self::PLUGIN_HOST
-	end
-
-	# Require some helper files.
-	#
-	# Example:
-	# 
-	#  class MyPlugin < PluginHost::BaseClass
-	#     register_for :my_id
-	#     helper :my_helper
-	#
-	# The above example loads the file myplugin/my_helper.rb relative to the
-	# file in which MyPlugin was defined.
-	def helper *helpers
-		for helper in helpers
-			self::PLUGIN_HOST.require_helper plugin_id, helper.to_s			
-		end
-	end
-
-	# Returns the pulgin id used by the engine.
-	def plugin_id
-		name[/[\w_]+$/].downcase
-	end
+  def included mod
+    warn "#{name} should not be included. Use extend."
+  end
+
+  # Register this class for the given langs.
+  # Example:
+  #   class MyPlugin < PluginHost::BaseClass
+  #     register_for :my_id
+  #     ...
+  #   end
+  #
+  # See PluginHost.register.
+  def register_for *ids
+    plugin_host.register self, *ids
+  end
+
+  # The host for this Plugin class.
+  def plugin_host host = nil
+    if host and not host.is_a? PluginHost
+      raise ArgumentError,
+        "PluginHost expected, but #{host.class} given."
+    end
+    self.const_set :PLUGIN_HOST, host if host
+    self::PLUGIN_HOST
+  end
+
+  # Require some helper files.
+  #
+  # Example:
+  #
+  #  class MyPlugin < PluginHost::BaseClass
+  #     register_for :my_id
+  #     helper :my_helper
+  #
+  # The above example loads the file myplugin/my_helper.rb relative to the
+  # file in which MyPlugin was defined.
+  def helper *helpers
+    for helper in helpers
+      self::PLUGIN_HOST.require_helper plugin_id, helper.to_s
+    end
+  end
+
+  # Returns the pulgin id used by the engine.
+  def plugin_id
+    name[/[\w_]+$/].downcase
+  end
 
 end
 
@@ -315,12 +315,12 @@ end
 # The syntax used is:
 #
 #  require_plugin '<Host ID>/<Plugin ID>'
-# 
+#
 # Returns the loaded plugin.
 def require_plugin path
-	host_id, plugin_id = path.split '/', 2
-	host = PluginHost.host_by_id(host_id)
-	raise PluginHost::HostNotFound,
-		"No host for #{host_id.inspect} found." unless host
-	host.load plugin_id
+  host_id, plugin_id = path.split '/', 2
+  host = PluginHost.host_by_id(host_id)
+  raise PluginHost::HostNotFound,
+    "No host for #{host_id.inspect} found." unless host
+  host.load plugin_id
 end