source file of the GNU LilyPond music typesetter
- (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
-
+ (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "paper-column-engraver.hh"
#include "note-spacing.hh"
#include "pointer-group-interface.hh"
#include "context.hh"
+#include "score-context.hh"
#include "axis-group-interface.hh"
#include "warn.hh"
#include "translator.icc"
-
Paper_column_engraver::Paper_column_engraver ()
{
+ last_moment_.main_part_ = Rational (-1,1);
command_column_ = 0;
musical_column_ = 0;
breaks_ = 0;
- break_event_ = 0;
system_ = 0;
first_ = true;
+ last_breakable_column_ = 0;
+ last_breakable_moment_ = Moment (-1);
}
void
if (command_column_)
{
- command_column_->set_property ("breakable", SCM_BOOL_T);
+ command_column_->set_property ("line-break-permission", ly_symbol2scm ("allow"));
system_->set_bound (RIGHT, command_column_);
- }
+ }
}
void
Paper_column *p1 = make_paper_column ("NonMusicalPaperColumn");
Paper_column *p2 = make_paper_column ("PaperColumn");
- SCM m = now_mom().smobbed_copy();
+ SCM m = now_mom ().smobbed_copy ();
p1->set_property ("when", m);
p2->set_property ("when", m);
-
+
set_columns (p1, p2);
}
-
void
Paper_column_engraver::initialize ()
{
- system_ = dynamic_cast<System*> (unsmob_grob (get_property ("rootSystem")));
+ system_ = dynamic_cast<System *> (unsmob_grob (get_property ("rootSystem")));
make_columns ();
-
system_->set_bound (LEFT, command_column_);
- command_column_->set_property ("breakable", SCM_BOOL_T);
+ command_column_->set_property ("line-break-permission", ly_symbol2scm ("allow"));
}
void
Paper_column_engraver::acknowledge_item (Grob_info gi)
{
- items_.push (gi.item ());
+ items_.push_back (gi.item ());
}
void
command_column_ = new_command;
musical_column_ = new_musical;
if (new_command)
- {
- context ()->set_property ("currentCommandColumn", new_command->self_scm ());
- }
+ context ()->set_property ("currentCommandColumn", new_command->self_scm ());
if (new_musical)
- {
- context ()->set_property ("currentMusicalColumn", new_musical->self_scm ());
- }
+ context ()->set_property ("currentMusicalColumn", new_musical->self_scm ());
system_->add_column (command_column_);
system_->add_column (musical_column_);
}
-
-void
-Paper_column_engraver::forbid_breaks ()
-{
- if (command_column_ && !first_)
- command_column_->set_property ("breakable", SCM_EOL);
-}
-
-
bool
Paper_column_engraver::try_music (Music *m)
{
- break_event_ = m;
+ break_events_.push_back (m);
return true;
}
void
Paper_column_engraver::process_music ()
{
- if (break_event_)
+ for (vsize i = 0; i < break_events_.size (); i++)
{
- SCM pen = command_column_->get_property ("penalty");
- Real total_penalty = scm_is_number (pen) ? scm_to_double (pen) : 0.0;
-
- SCM mpen = break_event_->get_property ("penalty");
- if (scm_is_number (mpen))
- total_penalty += scm_to_double (mpen);
-
- command_column_->set_property ("penalty", scm_from_double (total_penalty));
-
- /* ugh. arbitrary, hardcoded */
- if (total_penalty > 10000.0)
- forbid_breaks ();
+ string prefix;
+ SCM name = break_events_[i]->get_property ("name");
+ if (name == ly_symbol2scm ("LineBreakEvent"))
+ prefix = "line-break";
+ else if (name == ly_symbol2scm ("PageBreakEvent"))
+ prefix = "page-break";
+ else if (name == ly_symbol2scm ("PageTurnEvent"))
+ prefix = "page-turn";
+ else
+ {
+ programming_error ("Paper_column_engraver doesn't know about this break-event");
+ return;
+ }
+ string perm_str = prefix + "-permission";
+ string pen_str = prefix + "-penalty";
- SCM page_pen = command_column_->get_property ("page-penalty");
- Real total_pp = scm_is_number (page_pen) ? scm_to_double (page_pen) : 0.0;
- SCM mpage_pen = break_event_->get_property ("page-penalty");
- if (scm_is_number (mpage_pen))
- total_pp += scm_to_double (mpage_pen);
+ SCM cur_pen = command_column_->get_property (pen_str.c_str ());
+ SCM pen = break_events_[i]->get_property ("break-penalty");
+ SCM perm = break_events_[i]->get_property ("break-permission");
- command_column_->set_property ("page-penalty", scm_from_double (total_pp));
+ if (scm_is_number (pen))
+ {
+ Real new_pen = robust_scm2double (cur_pen, 0.0) + scm_to_double (pen);
+ command_column_->set_property (pen_str.c_str (), scm_from_double (new_pen));
+ command_column_->set_property (perm_str.c_str (), ly_symbol2scm ("allow"));
+ }
+ else
+ command_column_->set_property (perm_str.c_str (), perm);
}
-
bool start_of_measure = (last_moment_.main_part_ != now_mom ().main_part_
&& !measure_position (context ()).main_part_);
if (start_of_measure)
{
Moment mlen = Moment (measure_length (context ()));
- Grob * column = unsmob_grob (get_property ("currentCommandColumn"));
+ Grob *column = unsmob_grob (get_property ("currentCommandColumn"));
if (column)
column->set_property ("measure-length", mlen.smobbed_copy ());
else
- programming_error("No command column?");
+ programming_error ("No command column?");
}
}
void
Paper_column_engraver::stop_translation_timestep ()
{
- for (int i = 0; i < items_.size (); i++)
+ for (vsize i = 0; i < items_.size (); i++)
{
Item *elem = items_[i];
if (!elem->get_parent (X_AXIS)
|| !unsmob_grob (elem->get_object ("axis-group-parent-X")))
{
- bool br = to_boolean (elem->get_property ("breakable"));
+ bool br = Item::is_non_musical (elem);
Axis_group_interface::add_element (br ? command_column_ : musical_column_, elem);
}
}
items_.clear ();
-
- if (to_boolean (command_column_->get_property ("breakable")))
+
+ if (to_boolean (get_property ("forbidBreak")))
+ command_column_->set_property ("line-break-permission", SCM_EOL);
+ else if (Paper_column::is_breakable (command_column_))
{
breaks_++;
+ last_breakable_column_ = command_column_;
+ last_breakable_moment_ = now_mom ();
if (! (breaks_%8))
progress_indication ("[" + to_string (breaks_) + "]");
}
+ SCM page_br = get_property ("allowPageTurn");
+ if (scm_is_pair (page_br) && last_breakable_moment_ >= Rational (0))
+ {
+ SCM pen = scm_cdr (page_br);
+ Moment *m = unsmob_moment (scm_car (page_br));
+ if (m && scm_is_number (pen) && *m <= last_breakable_moment_)
+ {
+ last_breakable_column_->set_property ("page-turn-permission", ly_symbol2scm ("allow"));
+ last_breakable_column_->set_property ("page-turn-penalty", pen);
+ }
+ }
+
+ context ()->get_score_context ()->unset_property (ly_symbol2scm ("forbidBreak"));
+ context ()->get_score_context ()->unset_property (ly_symbol2scm ("allowPageTurn"));
+
first_ = false;
- break_event_ = 0;
+ break_events_.clear ();
}
void
make_columns ();
}
-ADD_ACKNOWLEDGER (Paper_column_engraver,item);
-ADD_ACKNOWLEDGER (Paper_column_engraver,note_spacing);
-ADD_ACKNOWLEDGER (Paper_column_engraver,staff_spacing);
-
+ADD_ACKNOWLEDGER (Paper_column_engraver, item);
+ADD_ACKNOWLEDGER (Paper_column_engraver, note_spacing);
+ADD_ACKNOWLEDGER (Paper_column_engraver, staff_spacing);
ADD_TRANSLATOR (Paper_column_engraver,
/* doc */ "Takes care of generating columns."
"\n\n "
"This engraver decides whether a column is breakable. The default is "
- "that a column is always breakable. However, when every Bar_engraver "
- "that does not have a barline at a certain point will call "
- "Score_engraver::forbid_breaks to stop linebreaks. In practice, this "
+ "that a column is always breakable. However, every Bar_engraver "
+ "that does not have a barline at a certain point will set forbidBreaks "
+ "in the score context to stop linebreaks. In practice, this "
"means that you can make a breakpoint by creating a barline (assuming "
"that there are no beams or notes that prevent a breakpoint.) ",
- /* create */ "PaperColumn NonMusicalPaperColumn",
+
+ /* create */
+ "PaperColumn "
+ "NonMusicalPaperColumn",
+
/* accept */ "break-event",
- /* read */ "",
- /* write */ "currentCommandColumn currentMusicalColumn");
+ /* read */
+ "forbidBreak "
+ "allowPageTurn",
+ /* write */
+ "forbidBreak "
+ "allowPageTurn "
+ "currentCommandColumn "
+ "currentMusicalColumn");
projects / lilypond.git / blobdiff