lib/vedeu/models/line.rb in vedeu-0.2.3 vs lib/vedeu/models/line.rb in vedeu-0.2.4

@@ -35,45 +35,65 @@
 
         instance_eval(&block)
       end
     end
 
-    # Returns a collection of streams associated with this line.
+    # Returns an array of all the characters with formatting for this line.
     #
     # @return [Array]
-    def streams
-      @streams ||= Stream.coercer(attributes[:streams])
+    # @see Vedeu::Stream
+    def chars
+      return [] if empty?
+
+      @_chars ||= streams.map(&:chars).flatten
     end
 
-    private
+    # Returns a boolean indicating whether the line has content.
+    #
+    # @return [Boolean]
+    def empty?
+      size == 0
+    end
 
-    # Convenience method to provide Presentation with a consistent interface.
+    # Returns the size of the content in characters without formatting.
     #
-    # @api private
+    # @return [Fixnum]
+    def size
+      streams.map(&:size).inject(0, :+) { |sum, x| sum += x }
+    end
+
+    # Returns a collection of streams associated with this line. This method
+    # also has the alias_method :data, a convenience method to provide
+    # Presentation with a consistent interface.
+    #
     # @return [Array]
-    def data
-      streams
+    def streams
+      @streams ||= Stream.coercer(attributes[:streams])
     end
+    alias_method :data, :streams
 
+    private
+
     # The default values for a new instance of Line.
     #
-    # @api private
     # @return [Hash]
     def defaults
       {
         colour:  {},
         streams: [],
         style:   [],
         parent:  nil,
       }
     end
 
-    # @api private
+    # @param method [Symbol] The name of the method sought.
+    # @param args [Array] The arguments which the method was to be invoked with.
+    # @param block [Proc] The optional block provided to the method.
     # @return []
     def method_missing(method, *args, &block)
       Vedeu.log("Line#method_missing '#{method.to_s}' (args: #{args.inspect})")
 
-      @self_before_instance_eval.send(method, *args, &block)
+      @self_before_instance_eval.send(method, *args, &block) if @self_before_instance_eval
     end
 
   end # Line
 
 end # Vedeu