lily/include/score-element.hh

   1 /*
   2   score-element.hh -- declare Score_element
   3
   4   (c) 1996-1999--2000 Han-Wen Nienhuys
   5 */
   6
   7 #ifndef STAFFELEM_HH
   8 #define STAFFELEM_HH
   9
  10 #include "parray.hh"
  11 #include "virtual-methods.hh"
  12 #include "lily-guile.hh"
  13 #include "lily-proto.hh"
  14 #include "smobs.hh"
  15 #include "dimension-cache.hh"
  16
  17 /**
  18     for administration of what was done already
  19     */
  20 enum Score_element_status {
  21   ORPHAN=0,                     // not yet added to Paper_score
  22   VIRGIN,
  23   PRECALCING,
  24   PRECALCED,            // calcs before spacing done
  25   POSTCALCING,          // busy calculating. This is used to trap cyclic deps.
  26   POSTCALCED,           // after spacing calcs done
  27 };
  28
  29 typedef void (Score_element::*Score_element_method_pointer) (void);
  30
  31 /*
  32    Basic output object.
  33 */
  34 class Score_element  {
  35 public:
  36   SCM immutable_property_alist_;
  37   SCM mutable_property_alist_;
  38   Score_element *original_l_;
  39
  40   /**
  41     Administration: Where are we?. This is mainly used by Super_element and
  42     Score_element::calcalute_dependencies ()
  43
  44     0 means ORPHAN,
  45    */
  46   char status_i_;
  47   String name () const;
  48
  49   /*
  50     IDEA: make this a global variable. This is the same for all
  51     elements, I think it is safe to assume that we will not have
  52     scores being formatted multithreadedly.
  53    */
  54   Paper_score *pscore_l_;
  55
  56   Score_element (SCM basic_props);
  57   Score_element (Score_element const&);
  58
  59   /*
  60     properties
  61    */
  62   SCM get_elt_property (const char*) const;
  63   SCM get_elt_property (SCM) const;
  64   void set_elt_property (const char * , SCM val);
  65   void set_immutable_elt_property (const char * , SCM val);
  66   void set_immutable_elt_property (SCM key, SCM val);
  67   void set_elt_property (SCM , SCM val);
  68   void set_elt_pointer (const char*, SCM val);
  69   friend class Property_engraver; //  UGHUGHUGH.
  70   SCM remove_elt_property (const char* nm);
  71
  72   /*
  73     related classes.
  74    */
  75   Paper_def *paper_l () const;
  76
  77   /**
  78     add a dependency. It may be the 0 pointer, in which case, it is ignored.
  79     */
  80   void add_dependency (Score_element*);
  81   virtual Line_of_score * line_l () const;
  82   bool linked_b () const;
  83
  84
  85   VIRTUAL_COPY_CONS(Score_element);
  86
  87   /**
  88      Recursively track all dependencies of this Score_element.  The
  89      status_i_ field is used as a mark-field.  It is marked with
  90      #busy# during execution of this function, and marked with #final#
  91      when finished.
  92
  93      #funcptr# is the function to call to update this element.
  94    */
  95   void calculate_dependencies (int final, int busy, SCM funcname);
  96   static SCM handle_broken_smobs (SCM, SCM criterion);
  97
  98   virtual void do_break_processing ();
  99   virtual Score_element *find_broken_piece (Line_of_score*) const;
 100   virtual void discretionary_processing ();
 101   virtual SCM do_derived_mark ();
 102
 103   Molecule get_molecule () const;
 104   void suicide ();
 105
 106   DECLARE_SCHEME_CALLBACK(preset_extent, (SCM smob, SCM axis));
 107   DECLARE_SCHEME_CALLBACK(point_dimension_callback, (SCM smob, SCM axis));
 108   DECLARE_SCHEME_CALLBACK(molecule_extent, (SCM smob, SCM axis));
 109
 110
 111   static SCM ly_set_elt_property (SCM, SCM,SCM);
 112   static SCM ly_get_elt_property (SCM, SCM);
 113
 114   bool has_interface (SCM intf);
 115   void set_interface (SCM intf);
 116
 117   virtual void handle_broken_dependencies ();
 118   virtual void handle_prebroken_dependencies ();
 119
 120
 121   DECLARE_SMOBS(Score_element,foo);
 122
 123   void init ();
 124
 125   Dimension_cache dim_cache_[NO_AXES];
 126
 127 public:
 128   bool empty_b (Axis a) const;
 129
 130   Interval extent (Score_element * refpoint, Axis) const;
 131
 132   /**
 133     translate in one direction
 134     */
 135
 136   void translate_axis (Real, Axis);
 137
 138   /**
 139      Find the offset relative to D.  If   D equals THIS, then it is 0.
 140      Otherwise, it recursively defd as
 141
 142      OFFSET_ + PARENT_L_->relative_coordinate (D)
 143    */
 144   Real relative_coordinate (Score_element const* refp, Axis) const;
 145   /**
 146     Find the group-element which has both #this# and #s#
 147    */
 148   Score_element*common_refpoint (Score_element const* s, Axis a) const;
 149   Score_element*common_refpoint (SCM elt_list, Axis a) const;
 150
 151   // duh. slim down interface here. (todo)
 152   bool has_offset_callback_b (SCM callback, Axis)const;
 153   void add_offset_callback (SCM callback, Axis);
 154   bool has_extent_callback_b (SCM, Axis)const;
 155   void set_extent_callback (SCM , Axis);
 156   bool has_extent_callback_b (Axis) const;
 157
 158
 159   /**
 160     Invoke callbacks to get offset relative to parent.
 161    */
 162   Real get_offset (Axis a) const;
 163   /**
 164      Set the  parent refpoint of THIS to E
 165    */
 166   void set_parent (Score_element* e, Axis);
 167
 168   Score_element *parent_l (Axis a) const;
 169   DECLARE_SCHEME_CALLBACK(fixup_refpoint, (SCM));
 170 };
 171
 172 Score_element * unsmob_element (SCM);
 173
 174 #endif // STAFFELEM_HH
 175