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/*
paper-column-engraver.cc -- implement Paper_column_engraver
source file of the GNU LilyPond music typesetter
(c) 2005--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "paper-column-engraver.hh"
#include "system.hh"
#include "international.hh"
#include "axis-group-interface.hh"
#include "context.hh"
#include "note-spacing.hh"
#include "paper-column.hh"
#include "pointer-group-interface.hh"
#include "staff-spacing.hh"
#include "system.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;
system_ = 0;
first_ = true;
}
void
Paper_column_engraver::finalize ()
{
if ((breaks_ % 8))
progress_indication ("[" + to_string (breaks_) + "]");
if (command_column_)
{
command_column_->set_property ("line-break-permission", ly_symbol2scm ("allow"));
command_column_->set_property ("page-turn-permission", ly_symbol2scm ("allow"));
system_->set_bound (RIGHT, command_column_);
}
}
void
Paper_column_engraver::make_columns ()
{
/*
ugh.
*/
Paper_column *p1 = make_paper_column ("NonMusicalPaperColumn");
Paper_column *p2 = make_paper_column ("PaperColumn");
/*
The columns are timestamped with now_mom () in
stop_translation_timestep. Cannot happen now, because the
first column is sometimes created before now_mom is initialised.
*/
set_columns (p1, p2);
}
void
Paper_column_engraver::initialize ()
{
system_ = dynamic_cast<System *> (unsmob_grob (get_property ("rootSystem")));
make_columns ();
system_->set_bound (LEFT, command_column_);
command_column_->set_property ("line-break-permission", ly_symbol2scm ("allow"));
}
void
Paper_column_engraver::acknowledge_item (Grob_info gi)
{
items_.push_back (gi.item ());
}
void
Paper_column_engraver::acknowledge_staff_spacing (Grob_info gi)
{
Pointer_group_interface::add_grob (command_column_,
ly_symbol2scm ("spacing-wishes"),
gi.grob ());
}
void
Paper_column_engraver::acknowledge_note_spacing (Grob_info gi)
{
Pointer_group_interface::add_grob (musical_column_,
ly_symbol2scm ("spacing-wishes"),
gi.grob ());
}
void
Paper_column_engraver::set_columns (Paper_column *new_command,
Paper_column *new_musical)
{
command_column_ = new_command;
musical_column_ = new_musical;
if (new_command)
context ()->set_property ("currentCommandColumn", new_command->self_scm ());
if (new_musical)
context ()->set_property ("currentMusicalColumn", new_musical->self_scm ());
system_->add_column (command_column_);
system_->add_column (musical_column_);
}
IMPLEMENT_TRANSLATOR_LISTENER (Paper_column_engraver, break);
void
Paper_column_engraver::listen_break (Stream_event *ev)
{
break_events_.push_back (ev);
}
void
Paper_column_engraver::process_music ()
{
for (vsize i = 0; i < break_events_.size (); i++)
{
string prefix;
SCM name_sym = break_events_[i]->get_property ("class");
string name = ly_scm2string (scm_symbol_to_string (name_sym));
size_t end = name.rfind ("-event");
if (end)
prefix = name.substr (0, end);
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 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");
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_);
/*
We can't do this in start_translation_timestep (), since time sig
changes won't have happened by then.
*/
if (start_of_measure)
{
Moment mlen = Moment (measure_length (context ()));
Grob *column = unsmob_grob (get_property ("currentCommandColumn"));
if (column)
column->set_property ("measure-length", mlen.smobbed_copy ());
else
programming_error ("No command column?");
}
}
void
Paper_column_engraver::stop_translation_timestep ()
{
SCM m = now_mom ().smobbed_copy ();
command_column_->set_property ("when", m);
musical_column_->set_property ("when", m);
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 = Item::is_non_musical (elem);
Axis_group_interface::add_element (br ? command_column_ : musical_column_, elem);
}
}
items_.clear ();
if (to_boolean (get_property ("forbidBreak")))
{
command_column_->set_property ("page-break-permission", SCM_EOL);
command_column_->set_property ("line-break-permission", SCM_EOL);
for (vsize i = 0; i < break_events_.size (); i++)
{
SCM perm = break_events_[i]->get_property ("permission");
if (perm == ly_symbol2scm ("force") || perm == ly_symbol2scm ("allow"))
warning (_f ("forced break was overridden by some other event, should you be using bar checks?"));
}
}
else if (Paper_column::is_breakable (command_column_))
{
breaks_++;
if (! (breaks_%8))
progress_indication ("[" + to_string (breaks_) + "]");
}
context ()->get_score_context ()->unset_property (ly_symbol2scm ("forbidBreak"));
first_ = false;
break_events_.clear ();
SCM mpos = get_property ("measurePosition");
SCM barnum = get_property ("internalBarNumber");
if (unsmob_moment (mpos)
&& scm_is_integer (barnum))
{
SCM where = scm_cons (barnum,
mpos);
command_column_->set_property ("rhythmic-location", where);
musical_column_->set_property ("rhythmic-location", where);
}
}
void
Paper_column_engraver::start_translation_timestep ()
{
/*
TODO: don't make columns when skipTypesetting is true.
*/
if (!first_)
make_columns ();
}
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, 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",
/* read */
"forbidBreak "
,
/* write */
"forbidBreak "
"currentCommandColumn "
"currentMusicalColumn "
);
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