indexing

	description:
		"A resource value for string resources.";
	date: "$Date$";
	revision: "$Revision$"

class STRING_RESOURCE

inherit
	RESOURCE

create
	make,
	make_with_values

feature {NONE} -- Initialization

	make_with_values (a_name: STRING; a_value: STRING) is
			-- Initialie Current
		require
			valid_name: a_name /= Void;
			valid_value: a_value /= Void
		do
			name := a_name;
			value := a_value
		end;

	make (a_name: STRING; rt: RESOURCE_TABLE; def_value: STRING) is
			-- Initialize Current
		require
			valid_name: a_name /= Void;
			valid_value: def_value /= Void
		do
			name := a_name
			value := rt.get_string (a_name, def_value);
			default_value := def_value;
		end

feature -- Access

	default_value, value: STRING
			-- Value as a `STRING' as represented by Current

	has_changed: BOOLEAN is
			-- Has the resource changed from the default value?
		do
			Result := not equal (default_value, value)
		end;

feature -- Setting

	set_value (new_value: STRING) is
			-- Set `value' to `new_value'.
		do
			value := new_value;
		end;

feature -- Access

	is_valid (a_value: STRING): BOOLEAN is
			-- Is `a_value' valid for use in Current?
		local
			lexer: RESOURCE_STRING_LEX;
			str: STRING
		do
			if not a_value.is_empty then
				if a_value @ 1 /= '%"' then
					create str.make (0);
					str.extend ('%"');
					str.append (a_value)
				else
					str := value.twin
				end
				if str @ str.count /= '%"' then
					str.extend ('%"')
				end;
				create lexer;
				Result := lexer.is_value_valid (str)
			else
				Result := True
			end
		end

end -- class STRING_RESOURCE