source file of the GNU LilyPond music typesetter
- (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "item.hh"
+#include "axis-group-interface.hh"
#include "paper-score.hh"
#include "warn.hh"
#include "paper-column.hh"
#include "system.hh"
#include "pointer-group-interface.hh"
+#include "moment.hh"
+
+
Grob *
-Item::clone (int count) const
+Item::clone () const
{
- return new Item (*this, count);
+ return new Item (*this);
}
-Item::Item (SCM s, Object_key const *key)
- : Grob (s, key)
+Item::Item (SCM s)
+ : Grob (s)
{
broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0;
+ cached_pure_height_valid_ = false;
}
/**
Item copy ctor. Copy nothing: everything should be a elt property
or a special purpose pointer (such as broken_to_drul_[]) */
-Item::Item (Item const &s, int copy_count)
- : Grob (s, copy_count)
+Item::Item (Item const &s)
+ : Grob (s)
{
broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0;
+ cached_pure_height_valid_ = false;
}
bool
{
Drul_array<Item *> new_copies;
Direction i = LEFT;
- int count = 0;
do
{
- Grob *dolly = clone (count++);
+ Grob *dolly = clone ();
Item *item = dynamic_cast<Item *> (dolly);
get_root_system (this)->typeset_grob (item);
new_copies[i] = item;
Can't do this earlier, because try_visibility_lambda () might set
the elt property transparent, which would then be copied.
*/
+ if (!Item::break_visible (this))
+ suicide ();
+}
+
+bool
+Item::break_visible (Grob *g)
+{
+ Item *it = dynamic_cast<Item*> (g);
+ SCM vis = g->get_property ("break-visibility");
+ if (scm_is_vector (vis))
+ return to_boolean (scm_c_vector_ref (vis, it->break_status_dir () + 1));
+ return true;
+}
+
+bool
+Item::pure_is_visible (int start, int end) const
+{
SCM vis = get_property ("break-visibility");
if (scm_is_vector (vis))
{
- bool visible = to_boolean (scm_vector_ref (vis, scm_from_int (break_status_dir () + 1)));
+ int pos = 1;
+ int pc_rank = Paper_column::get_rank (get_column ());
+ if (pc_rank == start)
+ pos = 2;
+ else if (pc_rank == end)
+ pos = 0;
+ return to_boolean (scm_vector_ref (vis, scm_from_int (pos)));
+ }
+ return true;
+}
+
+Interval_t<int>
+Item::spanned_rank_interval () const
+{
+ int c = get_column ()->get_rank ();
+ return Interval_t<int> (c, c);
+}
+
+Interval_t<Moment>
+spanned_time_interval (Item *l, Item *r)
+{
+ Drul_array<Item*> bounds (l, r);
+ Interval_t<Moment> iv;
- if (!visible)
- suicide ();
+ Direction d = LEFT;
+ do
+ {
+ if (bounds[d] && bounds[d]->get_column ())
+ iv[d] = robust_scm2moment (bounds[d]->get_column ()->get_property ("when"),
+ iv[d]);
+ }
+ while (flip (&d) != LEFT);
+
+ do
+ {
+ if (!bounds[d] || !bounds[d]->get_column ())
+ iv[d] = iv[-d];
}
+ while (flip (&d) != LEFT);
+
+
+ return iv;
}
+
void
Item::derived_mark () const
{
return dynamic_cast<Item *> (unsmob_grob (s));
}
+Interval
+Item::pure_height (Grob *g, int start, int end)
+{
+ if (cached_pure_height_valid_)
+ return cached_pure_height_ + pure_relative_y_coordinate (g, start, end);
+
+ cached_pure_height_ = Grob::pure_height (this, start, end);
+ cached_pure_height_valid_ = true;
+ return cached_pure_height_ + pure_relative_y_coordinate (g, start, end);
+}
+
+bool
+Item::less (Grob * const &g1, Grob * const &g2)
+{
+ return dynamic_cast<Item*> (g1)->get_column ()->get_rank () < dynamic_cast<Item*> (g2)->get_column ()->get_rank ();
+}
+
ADD_INTERFACE (Item,
- "item-interface",
- "\n"
- "\n"
- "Grobs can be distinguished in their role in the horizontal spacing.\n"
- "Many grobs define constraints on the spacing by their sizes. For\n"
- "example, note heads, clefs, stems, and all other symbols with a fixed\n"
- "shape. These grobs form a subtype called @code{Item}.\n"
- "\n"
+ "Grobs can be distinguished in their role in the horizontal"
+ " spacing. Many grobs define constraints on the spacing by"
+ " their sizes, for example, note heads, clefs, stems, and all"
+ " other symbols with a fixed shape. These grobs form a"
+ " subtype called @code{Item}.\n"
"\n"
- "Some items need special treatment for line breaking. For example, a\n"
- "clef is normally only printed at the start of a line (i.e. after a\n"
- "line break). To model this, `breakable' items (clef, key signature,\n"
- "bar lines, etc.) are copied twice. Then we have three versions of each\n"
- "breakable item: one version if there is no line break, one version\n"
- "that is printed before the line break (at the end of a system), one\n"
- "version that is printed after the line break.\n"
+ "Some items need special treatment for line breaking. For"
+ " example, a clef is normally only printed at the start of a"
+ " line (i.e., after a line break). To model this,"
+ " @q{breakable} items (clef, key signature, bar lines, etc.)"
+ " are copied twice. Then we have three versions of each"
+ " breakable item: one version if there is no line break, one"
+ " version that is printed before the line break (at the end of"
+ " a system), and one version that is printed after the line"
+ " break.\n"
"\n"
- "Whether these versions are visible and take up space, is determined by\n"
- "the outcome of the @code{break-visibility}. This grob property is a\n"
- "function taking a direction (-1, 0 or 1) as argument. It returns a\n"
- "cons of booleans, signifying whether this grob should be transparent\n"
- "and have no extent.\n"
+ "Whether these versions are visible and take up space is"
+ " determined by the outcome of the @code{break-visibility}"
+ " grob property, which is a function taking a direction"
+ " (@code{-1}, @code{0} or@tie{}@code{1}) as an argument. It"
+ " returns a cons of booleans, signifying whether this grob"
+ " should be transparent and have no extent.\n"
"\n"
- "The following variables for break-visibility are predefined:\n"
+ "The following variables for @code{break-visibility} are"
+ " predefined:\n"
"@example\n"
" grob will show: before no after\n"
" break break break\n"
" begin-of-line-invisible yes yes no\n"
" end-of-line-invisible no yes yes\n"
" center-invisible yes no yes\n"
- "@end example\n",
+ "@end example",
/* properties */
"break-visibility "
- "no-spacing-rods "
- "non-musical")
+ "extra-spacing-height "
+ "extra-spacing-width "
+ "non-musical "
+ );
projects / lilypond.git / blobdiff