indexing
	description: "Objects that ..."
	author: ""
	date: "$Date$"
	revision: "$Revision$"

class
	EXTERNAL_FILE_STONE

inherit
	FILED_STONE
		redefine
			is_valid, same_as
		end

	SHARED_EIFFEL_PROJECT

create
	make
	
feature {NONE} -- Initialization

	make (a_file: FILE) is
			-- Copy all information from argument
			-- OR KEEP A REFERENCE?
		do
			file := a_file
		end

feature -- Properties
 
--	class_i: CLASS_I is
--		do
--			Result := actual_class_i
--		ensure
--			non_void: Result /= Void
--		end
--
--	class_name: STRING is
--			-- Name of `class_i'.
--		do
--			Result := class_i.name
--		end
--
--	cluster: CLUSTER_I is
--			-- Cluster associated with current.
--		do
--			Result := class_i.cluster
--		end
--
	stone_cursor: EV_CURSOR is
			-- Cursor associated with Current stone during transport
			-- when widget at cursor position is compatible with Current stone
		once
			Result := Cursors.cur_Class
		end

	x_stone_cursor: EV_CURSOR is
			-- Cursor associated with Current stone during transport
			-- when widget at cursor position is not compatible with Current stone
		once
			Result := Cursors.cur_X_Class
		end

	file_name: FILE_NAME is
			-- File associated with `file'.
		do
			create Result.make_from_string (file.name)
		end

	stone_signature: STRING is
		do
			Result := file.name
		end

	history_name: STRING is
		do
			Result := Interface_names.s_Class_stone + stone_signature
		end

	same_as (other: STONE): BOOLEAN is
			-- Do `Current' and `other' represent the same class?
		local
			convcur: EXTERNAL_FILE_STONE
		do
			convcur ?= other
			Result := convcur /= Void and then file.is_equal (convcur.file)
		end

feature -- Access

	file: FILE

	header: STRING is
			-- Display class name, class' cluster and class location in 
			-- window title bar.
		do
			create Result.make (20)
			Result.append (stone_signature)
			Result.append ("(not an Eiffel class file) ")
			Result.append ("  located in ")
			Result.append (file.name)
		end
 
	is_valid: BOOLEAN is
			-- Is `Current' a valid stone?
		do
			Result := file /= Void
		end
--
--	synchronized_stone: CLASSI_STONE is
--			-- Clone of `Current' after a recompilation
--			-- (May be Void if not valid anymore. It may also 
--			-- be a classc_stone if the class is compiled now)
--		local
--			new_cluster: CLUSTER_I
--			new_ci: CLASS_I
--		do
--			if class_i /= Void then
--				new_cluster := Eiffel_Universe.cluster_of_name 
--							(class_i.cluster.cluster_name)
--				if new_cluster /= Void then
--					new_ci := new_cluster.class_with_name (class_i.name)
--					if
--						new_ci /= Void
--					then
--						if new_ci.compiled then
--							create {CLASSC_STONE} Result.make (new_ci.compiled_class)
--						else
--							create {CLASSI_STONE} Result.make (new_ci)
--						end
--					end
--				end
--			end
--		end
--
--feature -- Implementation
--
--	actual_class_i: CLASS_I

end -- class EXTERNAL_FILE_STONE