scribo/core/document.hh: Add new methods.

scribo/ChangeLog

+2010-11-16  Guillaume Lazzara  <z@lrde.epita.fr>
+
+	* scribo/core/document.hh: Add new methods.
+
 2010-11-16  Guillaume Lazzara  <z@lrde.epita.fr>
 
 	* scribo/io/xml/save.hh: Add conditions before saving elements and

scribo/scribo/core/document.hh

@@ -48,21 +48,24 @@ namespace scribo
     document();
     document(const char *filename);
 
+    void open();
+
     const char * filename() const;
+    void set_filename(const char*name);
 
     bool is_valid() const;
 
     const line_set<L>& text() const;
+    bool has_text() const;
     void set_text(const line_set<L>& line);
 
     const component_set<L>& elements() const;
+    bool has_elements() const;
     void set_elements(const component_set<L>& elements);
 
     const mln::image2d<value::rgb8>& image() const;
 
   private:
-    void open();
-
     const char *filename_;
     mln::image2d<mln::value::rgb8> image_;
 
@@ -97,6 +100,14 @@ namespace scribo
   }
 
 
+  template <typename L>
+  void
+  document<L>::set_filename(const char *filename)
+  {
+    filename_ = filename;
+  }
+
+
   template <typename L>
   void
   document<L>::open()
@@ -121,6 +132,14 @@ namespace scribo
   }
 
 
+  template <typename L>
+  bool
+  document<L>::has_text() const
+  {
+    return lines_.is_valid();
+  }
+
+
   template <typename L>
   void
   document<L>::set_text(const line_set<L>& line)
@@ -137,6 +156,14 @@ namespace scribo
   }
 
 
+  template <typename L>
+  bool
+  document<L>::has_elements() const
+  {
+    return elements_.is_valid();
+  }
+
+
   template <typename L>
   void
   document<L>::set_elements(const component_set<L>& elements)