-#include "varray.hh"
+/*
+ molecule.cc -- implement Molecule
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+#include <math.h>
+#include <libc-extension.hh> // isinf
+
+#include "font-metric.hh"
+#include "dimensions.hh"
#include "interval.hh"
-#include "dimen.hh"
#include "string.hh"
#include "molecule.hh"
-#include "symbol.hh"
-#include "debug.hh"
-#include "tex.hh"
+#include "warn.hh"
-void
-Atom::print() const
+
+#include "ly-smobs.icc"
+
+
+SCM
+Molecule::smobbed_copy () const
{
- mtor << "texstring: " <<sym.tex<<"\n";
+ Molecule * m = new Molecule (*this);
+
+ return m->smobbed_self ();
}
-Box
-Atom::extent() const
+Interval
+Molecule::extent (Axis a) const
{
- Box b( sym.dim);
- b.translate(off);
- return b;
+ return dim_[a];
}
-Atom::Atom(Symbol s)
+Molecule::Molecule (Box b, SCM func)
{
- sym=s;
+ expr_ = func;
+ dim_ = b;
}
-
-String
-Atom::TeX_string() const
+Molecule::Molecule ()
{
- /* infinity checks. */
- assert( abs(off.x) < 100 CM);
- assert( abs(off.y) < 100 CM);
-
- // whugh.. Hard coded...
- String s("\\placebox{%}{%}{%}");
- Array<String> a;
- a.push(print_dimen(off.y));
- a.push(print_dimen(off.x));
- a.push(sym.tex);
- return substitute_args(s, a);
+ expr_ = SCM_EOL;
+ set_empty (true);
}
-/* *************** */
-
-String
-Molecule::TeX_string() const
+void
+Molecule::translate (Offset o)
{
- String s;
- for(iter_top(ats,c); c.ok(); c++)
- s+=c->TeX_string();
- return s;
+ Axis a = X_AXIS;
+ while (a < NO_AXES)
+ {
+ if (abs (o[a]) > 100 CM
+ || isinf (o[a]) || isnan (o[a]))
+ {
+ programming_error ("Improbable offset for translation: setting to zero");
+ o[a] = 0.0;
+ }
+ incr (a);
+ }
+
+ expr_ = scm_list_n (ly_symbol2scm ("translate-molecule"),
+ ly_offset2scm (o),
+ expr_, SCM_UNDEFINED);
+ if (!is_empty ())
+ dim_.translate (o);
}
+
-Box
-Molecule::extent() const
+void
+Molecule::translate_axis (Real x,Axis a)
{
- Box b;
- for(iter_top(ats,c); c.ok(); c++)
- b.unite(c->extent());
- return b;
-}
+ Offset o (0,0);
+ o[a] = x;
+ translate (o);
+}
+
+
void
-Molecule::translate(Offset o)
+Molecule::add_molecule (Molecule const &m)
{
- for (iter_top(ats,c); c.ok(); c++)
- c->translate(o);
+ expr_ = scm_list_n (ly_symbol2scm ("combine-molecule"),
+ m.expr_,
+ expr_, SCM_UNDEFINED);
+ dim_.unite (m.dim_);
}
void
-Molecule::add(Molecule const &m)
+Molecule::set_empty (bool e)
{
- for (iter_top(m.ats,c); c.ok(); c++) {
- add(**c);
+ if (e)
+ {
+ dim_[X_AXIS].set_empty ();
+ dim_[Y_AXIS].set_empty ();
+ }
+ else
+ {
+ dim_[X_AXIS] = Interval (0,0);
+ dim_[Y_AXIS] = Interval (0,0);
}
}
+
void
-Molecule::add_right(Molecule const &m)
+Molecule::align_to (Axis a, Real x)
{
- if (!ats.size()) {
- add(m);
- return;
- }
- Real xof=extent().x.right - m.extent().x.left;
- Molecule toadd(m);
- toadd.translate(Offset(xof, 0.0));
- add(toadd);
+ if (is_empty ())
+ return ;
+
+ Interval i (extent (a));
+ translate_axis (-i.linear_combination (x), a);
}
+/*
+ See scheme Function.
+ */
void
-Molecule::add_left(Molecule const &m)
+Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding,
+ Real minimum)
{
- if (!ats.size()) {
- add(m);
- return;
+ Real my_extent= is_empty () ? 0.0 : dim_[a][d];
+ Interval i (m.extent (a));
+ Real his_extent;
+ if (i.is_empty ())
+ {
+ programming_error ("Molecule::add_at_edge: adding empty molecule.");
+ his_extent = 0.0;
}
- Real xof=extent().x.left - m.extent().x.right;
- Molecule toadd(m);
- toadd.translate(Offset(xof, 0.0));
- add(toadd);
+ else
+ his_extent = i[-d];
+
+ Real offset = (my_extent - his_extent) + d*padding;
+ if (minimum > 0 && fabs (offset) < minimum)
+ offset = sign (offset) * minimum;
+
+ Molecule toadd (m);
+ toadd.translate_axis (offset, a);
+ add_molecule (toadd);
}
-void
-Molecule::add_top(Molecule const &m)
+
+/*
+ Hmm... maybe this is not such a good idea ; stuff can be empty,
+ while expr_ == '()
+ */
+bool
+Molecule::is_empty () const
{
- if (!ats.size()) {
- add(m);
- return;
- }
- Real yof=extent().y.right - m.extent().y.left;
- Molecule toadd(m);
- toadd.translate(Offset(0,yof));
- add(toadd);
+ return expr_ == SCM_EOL;
}
-void
-Molecule::add_bottom(Molecule const &m)
+SCM
+Molecule::get_expr () const
{
- if (!ats.size()) {
- add(m);
- return;
- }
- Real yof=extent().y.left- m.extent().y.right;
- Molecule toadd(m);
- toadd.translate(Offset(0,yof));
- add(toadd);
+ return expr_;
}
-void
-Molecule::operator = (Molecule const &)
+
+
+Box
+Molecule::extent_box () const
{
- assert(false);
+ return dim_;
}
+IMPLEMENT_SIMPLE_SMOBS (Molecule);
-Molecule::Molecule(Molecule const &s)
+
+int
+Molecule::print_smob (SCM , SCM port, scm_print_state *)
{
- add(s);
+ scm_puts ("#<Molecule ", port);
+ scm_puts (" >", port);
+
+ return 1;
}
-void
-Molecule::print() const
+
+SCM
+Molecule::mark_smob (SCM s)
{
- for (iter_top(ats,c); c.ok(); c++)
- c->print();
+ Molecule *r = (Molecule *) ly_cdr (s);
+
+ return r->expr_;
}
+
+IMPLEMENT_TYPE_P (Molecule, "ly:molecule?");
+IMPLEMENT_DEFAULT_EQUAL_P (Molecule);
+
projects / lilypond.git / blobdiff