X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;ds=sidebyside;f=lily%2Fdimension-cache.cc;h=6fc99bde284f48bee45184eeb3a604d4ffaa5edf;hb=0f7b7e90fb80f52206e3bca71357eb2a4d481235;hp=8746337cca4b96bac67fd08dfcb7cd38726fed47;hpb=afa5829cd270e1b0c616b7ba5c5e6cdc0e920e5f;p=lilypond.git

diff --git a/lily/dimension-cache.cc b/lily/dimension-cache.cc
index 8746337cca..6fc99bde28 100644
--- a/lily/dimension-cache.cc
+++ b/lily/dimension-cache.cc
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
  */
 
 #include "dimension-cache.hh"
@@ -12,7 +12,9 @@
 Dimension_cache::Dimension_cache (Dimension_cache const &d)
 {
   init();
+  callback_l_ = d.callback_l_;
   empty_b_ = d.empty_b_;
+  offset_ = d.offset_; //let's hope others will copy  the refpoint appropriately. 
 }
 
 Dimension_cache::Dimension_cache ()
@@ -23,6 +25,7 @@ Dimension_cache::Dimension_cache ()
 void
 Dimension_cache::init()
 {
+  callback_l_ =0;
   offset_ =0.0;
   elt_l_ = 0;
   dim_.set_empty ();
@@ -66,46 +69,36 @@ Dimension_cache::translate (Real x)
   offset_ += x;
 }
 
-
-Real
-Dimension_cache::absolute_coordinate () const
-{
-  Real r = offset_;
-  for (Dimension_cache * c = parent_l_;
-       c; c = c->parent_l_)
-    r += c->offset_;
-  return r;
-}
-
 Real
-Dimension_cache::relative_coordinate (Dimension_cache *d) const
+Dimension_cache::relative_coordinate (Dimension_cache *refp) const
 {
-  Real r =0.0;
-
-  for (Dimension_cache* c = parent_l_;
-       c != d;
-       c = c->parent_l_)
-    r +=  c->offset_;
-  return r;
+  if (refp == this)
+    return 0.0;
+
+  /*
+    We catch PARENT_L_ == nil case with this, but we crash if we did
+    not ask for the absolute coordinate (ie. REFP == nil.)
+    
+   */
+  if (refp == parent_l_)
+    return offset_;
+  else
+    return offset_ + parent_l_->relative_coordinate (refp);
 }
 
 Dimension_cache *
-Dimension_cache::common_group (Dimension_cache const* s) const
+Dimension_cache::common_refpoint (Dimension_cache const* s) const
 {
-  Link_array<Dimension_cache const> my_groups;
-  for (Dimension_cache const *c = this;
-       c ; c = c->parent_l_)
-    my_groups.push (c);
-  
+  Link_array<Dimension_cache> my_groups;
+  for (Dimension_cache const *c = this; c ; c = c->parent_l_)
+    my_groups.push ((Dimension_cache*)c);
   
   Dimension_cache const *common=0;
   
-  for (Dimension_cache const * d = s;
-       !common && d;
-       d = d->parent_l_)
-    common = my_groups.find_l (d);
+  for (Dimension_cache const * d = s; !common && d; d = d->parent_l_)
+    common = (Dimension_cache const*)my_groups.find_l (d);
 
-  return (Dimension_cache*)common;
+  return (Dimension_cache*) common;
 }
 
 
@@ -121,14 +114,6 @@ Dimension_cache::set_empty (bool b)
     }
 }  
 
-void
-Dimension_cache::set_dim (Interval v)
-{
-  dim_ = v;
-  valid_b_ = true;
-}
-  
-
 Interval
 Dimension_cache::get_dim () const
 {
@@ -139,13 +124,21 @@ Dimension_cache::get_dim () const
       return r;
     }
       
-  assert (valid_b_);
+  if (!valid_b_)
+    {
+      Dimension_cache *nc = ((Dimension_cache*)this);
+      nc->dim_= (*callback_l_ ) (nc);
+      nc->valid_b_ = true;
+    }
 
   r=dim_;
-  if (!r.empty_b()) // float exception on DEC Alpha
-    r += offset_;
 
   return r;
 }
 
+void
+Dimension_cache::set_callback (Dim_cache_callback c)
+{
+  callback_l_ =c;
+}