Replace it with functions get_line_forces and get_line_configuration.
(class Simple_spacer): Make data private.
Rewrite compression algorithm to be faster and simpler.
* lily/simple-spacer-scheme.cc (ly_solve_rod_and_spring_problem):
* lily/gourlay-breaking.cc (solve):
* lily/constrained_breaking.cc (space_line):
Change it to the new simple-spacer code.
* lily/paper-score.cc (get_paper_systems):
(Paper_score):
(process):
Delay breaking the systems until they are requested.
(find_break_indices):
Use vsize for indices.
(calc_breaking):
Move the "Calculating line breaks" message here.
* lily/system.cc (pre_processing):
Move the "Calculating line breaks" message away from here.
(break_into_pieces):
Allow multiple calls to this function in sequence (with touching-but-
not-overlapping breakpoints).
* lily/constrained-breaking.cc:
Replace most of the get_XXXX functions with get_line_details.
Only calculate the force for each line. Calculate configurations only
for the lines we will actually use.
Replace cols_ with lines_.
+2006-05-04 Joe Neeman <joeneeman@gmail.com>
+
+ * lily/simple-spacer.cc: Remove class Simple_spacer_wrapper.
+ Replace it with functions get_line_forces and get_line_configuration.
+ (class Simple_spacer): Make data private.
+ Rewrite compression algorithm to be faster and simpler.
+
+ * lily/simple-spacer-scheme.cc (ly_solve_rod_and_spring_problem):
+ * lily/gourlay-breaking.cc (solve):
+ * lily/constrained_breaking.cc (space_line):
+ Change it to the new simple-spacer code.
+
+ * lily/paper-score.cc (get_paper_systems):
+ (Paper_score):
+ (process):
+ Delay breaking the systems until they are requested.
+ (find_break_indices):
+ Use vsize for indices.
+ (calc_breaking):
+ Move the "Calculating line breaks" message here.
+
+ * lily/system.cc (pre_processing):
+ Move the "Calculating line breaks" message away from here.
+ (break_into_pieces):
+ Allow multiple calls to this function in sequence (with touching-but-
+ not-overlapping breakpoints).
+
+ * lily/constrained-breaking.cc:
+ Replace most of the get_XXXX functions with get_line_details.
+ Only calculate the force for each line. Calculate configurations only
+ for the lines we will actually use.
+ Replace cols_ with lines_.
+
2006-05-04 Han-Wen Nienhuys <hanwen@xs4all.nl>
* scm/framework-ps.scm (write-preamble): new function.
vector<Grob*> retval;
for (vsize i = 0; i < all.size (); i++)
- if (Item::is_breakable (all[i]))
- retval.push_back (all[i]);
-
+ {
+ Item *it = dynamic_cast<Item*> (all[i]);
+ if (Item::is_breakable (all[i])
+ && (i == 0 || it->find_prebroken_piece (LEFT))
+ && (i == all.size () - 1 || it->find_prebroken_piece (RIGHT)))
+ retval.push_back (all[i]);
+ }
return retval;
}
-Simple_spacer_wrapper *
-Break_algorithm::generate_spacing_problem (vector<Grob*> const &curline,
- Interval line) const
-{
- Simple_spacer_wrapper *spw = new Simple_spacer_wrapper;
- Simple_spacer *sp = spw->spacer_;
-
- /*
- this is hardcoded, but this shouldn't happen anyway.
- used to be get_dimension (ly_symbol2scm ("loose_column_distance"));
- */
- sp->default_space_ = 1.0;
- sp->indent_ = line[LEFT];
-
- /*
- sort out how interfacing this should work;
- */
- if (line.is_empty ())
- sp->line_len_ = -1;
- else
- sp->line_len_ = line.length ();
-
- spw->add_columns (curline);
- return spw;
-}
-
Break_algorithm::Break_algorithm ()
{
pscore_ = 0;
if (0 == sys && j > 0)
break; /* the first line cannot have its first break after the beginning */
- Column_x_positions const *cur = &cols_[(j + start_col)*cols_rank_ + brk];
- Column_x_positions const *prev = NULL;
+ Line_details const &cur = lines_[(j + start_col)*lines_rank_ + brk];
+ Real prev_f = 0;
Real prev_dem = 0;
if (sys > 0)
{
- prev = st[(sys-1) * rank + j].line_config_;
+ prev_f = st[(sys-1) * rank + j].details_.force_;
prev_dem = st[(sys-1) * rank + j].demerits_;
}
if (isinf (prev_dem))
break;
- Real dem;
- Real force;
- Real pen;
- combine_demerits (prev, cur, &force, &pen, &dem);
- dem += prev_dem;
+ Real dem = combine_demerits (cur.force_, prev_f) + prev_dem + cur.break_penalty_;
if (isinf (dem))
continue;
{
found_something = true;
st[k].demerits_ = dem;
- st[k].force_ = force;
- st[k].penalty_ = pen;
+ st[k].details_ = cur;
st[k].prev_ = j;
- st[k].line_config_ = cur;
}
}
return found_something;
Column_x_positions col;
vector<Grob*> line (all_.begin () + breaks_[i],
- all_.begin() + breaks_[j] + 1);
-
- line[0] = dynamic_cast<Item *> (line[0])->find_prebroken_piece (RIGHT);
- line.back () = dynamic_cast<Item *> (line.back ())->find_prebroken_piece (LEFT);
-
- col.cols_ = line;
-
- /* we have no idea what line this will be -- only whether it is the first */
+ all_.begin() + breaks_[j] + 1);
Interval line_dims = line_dimensions_int (pscore_->layout (), i);
- Simple_spacer_wrapper *sp = generate_spacing_problem (line, line_dims);
-
bool last = j == breaks_.size () - 1;
bool ragged = ragged_right || (last && ragged_last);
- sp->solve (&col, ragged);
- delete sp;
- return col;
+ return get_line_configuration (line, line_dims[RIGHT] - line_dims[LEFT], line_dims[LEFT], ragged);
}
void
if (!breaks_.size () && pscore_)
{
+ Output_def *l = pscore_->layout ();
+ Real extent = scm_to_double (l->c_variable ("system-height"));
+ Real padding = scm_to_double (l->c_variable ("between-system-padding"));
+ Real space = scm_to_double (l->c_variable ("between-system-space"));
+ bool ragged_right = to_boolean (pscore_->layout ()->c_variable ("ragged-right"));
+ bool ragged_last = to_boolean (pscore_->layout ()->c_variable ("ragged-last"));
+
+ Interval first_line = line_dimensions_int (pscore_->layout (), 0);
+ Interval other_lines = line_dimensions_int (pscore_->layout (), 1);
/* do all the rod/spring problems */
breaks_ = pscore_->find_break_indices ();
- cols_rank_ = breaks_.size ();
+ lines_rank_ = breaks_.size ();
all_ = pscore_->root_system ()->columns ();
- cols_.resize (breaks_.size () * breaks_.size ());
+ lines_.resize (breaks_.size () * breaks_.size ());
+ vector<Real> forces = get_line_forces (all_,
+ breaks_,
+ other_lines.length (),
+ other_lines.length () - first_line.length (),
+ ragged_right);
for (vsize i = 0; i < breaks_.size () - 1; i++)
+ {
for (vsize j = i + 1; j < breaks_.size (); j++)
{
- cols_[i*cols_rank_ + j] = space_line (i, j);
- if (!cols_[i*cols_rank_ + j].satisfies_constraints_)
+ bool last = j == breaks_.size () - 1;
+ bool ragged = ragged_right || (last && ragged_last);
+ int k = i*lines_rank_ + j;
+ SCM pen = all_[breaks_[j]]->get_property ("penalty");
+ if (scm_is_number (pen))
+ lines_[k].break_penalty_ = scm_to_double (pen);
+
+ lines_[k].force_ = forces[k];
+ lines_[k].extent_ = extent;
+ lines_[k].padding_ = padding;
+ lines_[k].space_ = space;
+ lines_[k].inverse_hooke_ = 3; // FIXME: somewhat arbitrary
+ if (ragged && lines_[k].force_ < 0)
+ lines_[k].force_ = infinity_f;
+ if (isinf (lines_[k].force_))
break;
}
+ }
/* work out all the starting indices */
for (vsize i = 0; i < start_.size (); i++)
{
vsize rank;
vsize end_brk;
+ vsize start_brk = starting_breakpoints_[start];
prepare_solution (start, end, sys_count, &rank, &end_brk);
vector<Constrained_break_node> const &st = state_[start];
{
for (vsize brk = end_brk; brk != VPOS; brk--)
{
- if (!isinf (st[sys*rank + brk].force_))
+ if (!isinf (st[sys*rank + brk].details_.force_))
{
if (brk != end_brk)
{
/* build up the good solution */
for (vsize cur_sys = sys; cur_sys != VPOS; cur_sys--)
{
+ vsize prev_brk = st[cur_sys*rank + brk].prev_;
assert (brk != VPOS);
- ret.push_back( *st[cur_sys*rank + brk].line_config_ );
- brk = st[cur_sys*rank + brk].prev_;
+ ret.push_back (space_line (prev_brk + start_brk, brk + start_brk));
+ brk = prev_brk;
}
reverse (ret);
return ret;
return ret;
}
-Real
-Constrained_breaking::get_demerits (vsize start, vsize end, vsize sys_count)
-{
- vsize rank;
- vsize brk;
- prepare_solution (start, end, sys_count, &rank, &brk);
-
- return state_[start][(sys_count-1)*rank + brk].demerits_;
-}
-
-Real
-Constrained_breaking::get_force (vsize start, vsize end, vsize sys_count)
+std::vector<Line_details>
+Constrained_breaking::get_details (vsize start, vsize end, vsize sys_count)
{
vsize rank;
vsize brk;
prepare_solution (start, end, sys_count, &rank, &brk);
vector<Constrained_break_node> const &st = state_[start];
- Real f = 0;
+ vector<Line_details> ret;
for (int sys = sys_count-1; sys >= 0 && brk != VPOS; sys--)
{
- f += fabs (st[sys*rank + brk].force_);
+ ret.push_back (st[sys*rank + brk].details_);
brk = st[sys*rank + brk].prev_;
}
- if (brk == VPOS)
- f = infinity_f;
-
- return f;
-}
-
-Real
-Constrained_breaking::get_penalty (vsize start, vsize end, vsize sys_count)
-{
- vsize rank;
- vsize brk;
- prepare_solution (start, end, sys_count, &rank, &brk);
-
- return state_[start][(sys_count-1)*rank + brk].penalty_;
-}
-
-Real
-Constrained_breaking::get_page_penalty (vsize start, vsize end, vsize sys_count, vsize sys_num, bool turn)
-{
- vsize rank;
- vsize brk;
- prepare_solution (start, end, sys_count, &rank, &brk);
-
- vsize sys;
- for (sys = sys_count-1; sys > sys_num; sys--)
- brk = state_[start][sys*rank + brk].prev_;
-
- if (brk == VPOS) /* we didn't satisfy constraints */
- return 0;
- vector<Grob*> const &cols = state_[start][sys*rank + brk].line_config_->cols_;
- if (cols.empty ())
- return 0;
-
- Grob const *pc = cols.back ();
- if (pc->original ())
- {
- SCM pen = pc->get_property ("page-penalty");
- SCM turn_pen = pc->get_property ("page-turn-penalty");
- Real ret = 0;
- if (!turn && scm_is_number (pen) && fabs (scm_to_double (pen)) < 10000)
- ret = scm_to_double (pen);
- if (turn && scm_is_number (turn_pen) && fabs (scm_to_double (turn_pen)) < 10000)
- ret = scm_to_double (turn_pen);
- return ret;
- }
- return 0;
+ return ret;
}
int
{
resize (sys_count + 3);
}
- if (!isinf (st[sys_count*rank + brk].force_))
+ if (!isinf (st[sys_count*rank + brk].details_.force_))
return sys_count + 1;
}
/* no possible breaks satisfy constraints */
start_.push_back (0);
}
-Constrained_breaking::Constrained_breaking (vector<int> const &start)
+Constrained_breaking::Constrained_breaking (vector<vsize> const &start)
: start_ (start)
{
valid_systems_ = systems_ = 0;
}
-void
-Constrained_breaking::combine_demerits (Column_x_positions const *prev,
- Column_x_positions const *col,
- Real *force,
- Real *penalty,
- Real *demerits) const
+Real
+Constrained_breaking::combine_demerits (Real force, Real prev_force)
{
- Real prev_f = prev ? prev->force_ : 0;
-
- *penalty = 0;
- if (col->cols_.empty () || !col->satisfies_constraints_)
- *force = infinity_f;
- else
- {
- *force = col->force_;
-
- Grob *pc = col->cols_.back ();
- if (pc->original ())
- {
- SCM pen = pc->get_property ("penalty");
- if (scm_is_number (pen) && fabs (scm_to_double (pen)) < 10000)
- *penalty += scm_to_double (pen);
- }
- }
-
- *demerits = (*force) * (*force) + abs (prev_f - *force) + *penalty;
+ return force * force + fabs (prev_force - force);
}
vector<Grob*> all
= pscore_->root_system ()->columns ();
- vector<int> breaks = pscore_->find_break_indices ();
+ vector<vsize> breaks = pscore_->find_break_indices ();
Break_node first_node;
optimal_paths.push_back (first_node);
for (vsize start_idx = break_idx; start_idx--;)
{
vector<Grob*> line (all.begin () + breaks[start_idx],
- all.begin () + breaks[break_idx] + 1);
-
- line[0] = dynamic_cast<Item *> (line[0])->find_prebroken_piece (RIGHT);
- line.back () = dynamic_cast<Item *> (line.back ())->find_prebroken_piece (LEFT);
-
- Column_x_positions cp;
- cp.cols_ = line;
+ all.begin () + breaks[break_idx] + 1);
Interval line_dims
= line_dimensions_int (pscore_->layout (), optimal_paths[start_idx].line_);
- Simple_spacer_wrapper *sp = generate_spacing_problem (line, line_dims);
bool last_line = break_idx == breaks.size () - 1;
- bool ragged = ragged_right
- || (last_line && ragged_last);
-
- sp->solve (&cp, ragged);
-
- delete sp;
+ bool ragged = ragged_right || (last_line && ragged_last);
+ Column_x_positions cp = get_line_configuration (line, line_dims[RIGHT] - line_dims[LEFT],
+ line_dims[LEFT], ragged);
if (ragged && last_line)
cp.force_ = 0.0;
void solve_line (Column_x_positions *) const;
bool feasible (vector<Grob*> const &) const;
- Simple_spacer_wrapper *generate_spacing_problem (vector<Grob*> const &,
- Interval) const;
public:
virtual ~Break_algorithm ();
Simple_spacer *(*get_line_spacer) ();
#include "break-algorithm.hh"
+enum Fordfor {
+ FORBID = -1,
+ DEFAULT = 0,
+ FORCE = 1
+};
+
+struct Line_details {
+ Real force_;
+ Real extent_; /* Y-exent of the system */
+ Real padding_; /* compulsory space after this system (if we're not last on a page) */
+ Real space_; /* spring length (stretches over extent_ but not over padding_) */
+ Real inverse_hooke_;
+
+ Fordfor line_break_;
+ Fordfor page_break_;
+ Fordfor page_turn_;
+ Real break_penalty_;
+ Real page_penalty_;
+ Real turn_penalty_;
+
+ Line_details::Line_details ()
+ {
+ force_ = infinity_f;
+ extent_ = 0;
+ padding_ = 0;
+ space_ = 0;
+ inverse_hooke_ = 1;
+ line_break_ = DEFAULT;
+ page_break_ = DEFAULT;
+ page_turn_ = DEFAULT;
+ break_penalty_ = 0;
+ page_penalty_ = 0;
+ turn_penalty_ = 0;
+ }
+};
+
/*
Helper to trace back an optimal path
*/
/* unlike the Gourlay breaker, this is the sum of all demerits up to,
* and including, this line */
Real demerits_;
- Real force_;
- Real penalty_;
- Column_x_positions const *line_config_;
+ struct Line_details details_;
Constrained_break_node ()
{
prev_ = -1;
demerits_ = infinity_f;
- force_ = infinity_f;
- penalty_ = 0;
- line_config_ = 0;
}
void print () const
{
- printf ("prev break %d, demerits %f\n",
- prev_, demerits_);
+ printf ("prev break %d, demerits %f\n", prev_, demerits_);
}
};
class Constrained_breaking : public Break_algorithm
{
public:
- std::vector<Column_x_positions> solve ();
+ vector<Column_x_positions> solve ();
Constrained_breaking ();
- Constrained_breaking (std::vector<int> const &start_col_posns);
+ Constrained_breaking (vector<vsize> const &start_col_posns);
- std::vector<Column_x_positions> get_solution(vsize start, vsize end, vsize sys_count);
- Real get_demerits (vsize start, vsize end, vsize sys_count);
- Real get_force (vsize start, vsize end, vsize sys_count);
- Real get_penalty (vsize start, vsize end, vsize sys_count);
+ vector<Column_x_positions> get_solution(vsize start, vsize end, vsize sys_count);
+ vector<Line_details> get_details (vsize start, vsize end, vsize sys_count);
int get_max_systems (vsize start, vsize end);
int get_min_systems (vsize start, vsize end);
- /* get the page penalty of system number sys with the given breaking */
- Real get_page_penalty (vsize start, vsize end, vsize sys_count, vsize sys, bool turn);
-
void resize (vsize systems);
private:
vsize valid_systems_;
vsize systems_;
- /* the (i,j)th entry is the column configuration for breaking between
+ /* the (i,j)th entry is the configuration for breaking between
columns i and j */
- std::vector<Column_x_positions> cols_;
- vsize cols_rank_;
+ vector<Line_details> lines_;
+ vsize lines_rank_;
/* the [i](j,k)th entry is the score for fitting the first k bars onto the
first j systems, starting at the i'th allowed starting column */
- std::vector<std::vector<Constrained_break_node> > state_;
+ vector<vector<Constrained_break_node> > state_;
- vector<int> start_; /* the columns at which we might be asked to start breaking */
- vector<int> starting_breakpoints_; /* the corresponding index in breaks_ */
+ vector<vsize> start_; /* the columns at which we might be asked to start breaking */
+ vector<vsize> starting_breakpoints_; /* the corresponding index in breaks_ */
vector<Grob*> all_;
- std::vector<int> breaks_;
+ vector<vsize> breaks_;
Column_x_positions space_line (vsize start_col, vsize end_col);
void prepare_solution (vsize start, vsize end, vsize sys_count, vsize *rank, vsize *brk);
- void combine_demerits (Column_x_positions const *, Column_x_positions const *,
- Real *force, Real *pen, Real *dem) const;
+ Real combine_demerits (Real force, Real prev_force);
bool calc_subproblem(vsize start, vsize systems, vsize max_break_index);
};
void typeset_system (System *);
vector<Column_x_positions> calc_breaking ();
- vector<int> find_break_indices () const;
- SCM get_paper_systems () const;
+ vector<vsize> find_break_indices () const;
+ SCM get_paper_systems ();
protected:
virtual void process ();
virtual void derived_mark () const;
{
Real ideal_;
Real inverse_hooke_;
- bool is_active_;
Real block_force_;
Real length (Real force) const;
Spring_description ();
bool is_sane () const;
+
+ bool operator> (const Spring_description &s) const
+ {
+ return block_force_ > s.block_force_;
+ }
+
+ bool operator< (const Spring_description &s) const
+ {
+ return block_force_ < s.block_force_;
+ }
};
class Simple_spacer
{
public:
- vector<Spring_description> springs_;
- Real force_;
- Real indent_;
- Real line_len_;
- Real default_space_;
- int active_count_;
-
Simple_spacer ();
- void my_solve_linelen ();
- void my_solve_natural_len ();
- Real active_springs_stiffness () const;
- Real range_stiffness (int, int) const;
+ void solve (Real line_len, bool ragged);
void add_rod (int l, int r, Real dist);
void add_spring (Real, Real);
Real range_ideal_len (int l, int r) const;
- Real active_blocking_force ()const;
- Real configuration_length ()const;
- void set_active_states ();
- bool is_active () const;
+ Real range_stiffness (int l, int r) const;
+ Real configuration_length () const;
+ vector<Real> spring_positions () const;
+
+ Real force ();
+ bool fits ();
DECLARE_SIMPLE_SMOBS (Simple_spacer,);
-};
-struct Simple_spacer_wrapper
-{
- Simple_spacer *spacer_;
- vector<Grob*> spaced_cols_;
- vector<Grob*> loose_cols_;
-
- Simple_spacer_wrapper ();
- void add_columns (vector<Grob*> const &);
- void solve (Column_x_positions *, bool);
- ~Simple_spacer_wrapper ();
private:
- Simple_spacer_wrapper (Simple_spacer_wrapper const &);
+ Real expand_line ();
+ Real compress_line ();
+ Real rod_force (int l, int r, Real dist);
+
+ vector<Spring_description> springs_;
+ Real line_len_;
+ Real force_;
+ bool ragged_;
+ bool fits_;
};
+/* returns a vector of dimensions breaks.size () * breaks.size () */
+vector<Real> get_line_forces (vector<Grob*> const &columns,
+ vector<vsize> breaks,
+ Real line_len,
+ Real indent,
+ bool ragged);
+
+Column_x_positions get_line_configuration (vector<Grob*> const &columns,
+ Real line_len,
+ Real indent,
+ bool ragged);
+
#endif /* SIMPLE_SPACER_HH */
layout_ = layout;
system_ = 0;
systems_ = SCM_EOL;
- paper_systems_ = SCM_EOL;
+ paper_systems_ = SCM_BOOL_F;
}
Paper_score::Paper_score (Paper_score const &s)
}
-vector<int>
+vector<vsize>
Paper_score::find_break_indices () const
{
vector<Grob*> all = root_system ()->columns ();
- vector<int> retval;
+ vector<vsize> retval;
for (vsize i = 0; i < all.size (); i++)
- if (Item::is_breakable (all[i]))
- retval.push_back (i);
+ {
+ Item *it = dynamic_cast<Item*> (all[i]);
+ if (Item::is_breakable (all[i])
+ && (i == 0 || it->find_prebroken_piece (LEFT))
+ && (i == all.size () - 1 || it->find_prebroken_piece (RIGHT)))
+ retval.push_back (i);
+ }
return retval;
}
{
Break_algorithm *algorithm = 0;
vector<Column_x_positions> sol;
-
+
+ message (_ ("Calculating line breaks...") + " ");
+
int system_count = robust_scm2int (layout ()->c_variable ("system-count"), 0);
if (system_count)
{
pc.back ()->set_property ("breakable", SCM_BOOL_T);
system_->pre_processing ();
-
- vector<Column_x_positions> breaking = calc_breaking ();
- system_->break_into_pieces (breaking);
-
- paper_systems_ = system_->get_paper_systems ();
}
System *
}
SCM
-Paper_score::get_paper_systems () const
+Paper_score::get_paper_systems ()
{
+ if (paper_systems_ == SCM_BOOL_F)
+ {
+ vector<Column_x_positions> breaking = calc_breaking ();
+ system_->break_into_pieces (breaking);
+ message (_ ("Drawing systems...") + " ");
+ paper_systems_ = system_->get_paper_systems ();
+ }
return paper_systems_;
}
spacer.add_rod (l, r, distance);
}
- spacer.line_len_ = scm_to_double (length);
+ spacer.solve (scm_to_double (length), is_ragged);
- if (is_ragged)
- spacer.my_solve_natural_len ();
- else
- spacer.my_solve_linelen ();
+ vector<Real> posns = spacer.spring_positions ();
- vector<Real> posns;
- posns.push_back (0.0);
- for (vsize i = 0; i < spacer.springs_.size (); i++)
- {
- Real l = spacer.springs_[i].length ((is_ragged) ? 0.0 : spacer.force_);
- posns.push_back (posns.back () + l);
- }
-
- SCM force_return = SCM_BOOL_F;
- if (!isinf (spacer.force_)
- && (spacer.is_active () || is_ragged))
- force_return = scm_from_double (spacer.force_);
-
- if (is_ragged
- && posns.back () > spacer.line_len_)
- force_return = SCM_BOOL_F;
+ SCM force_return = spacer.fits () ? scm_from_double (spacer.force ()) : SCM_BOOL_F;
SCM retval = SCM_EOL;
for (vsize i = posns.size (); i--;)
Simple_spacer::Simple_spacer ()
{
- /*
- Give an extra penalty for compression. Needed to avoid compressing
- tightly spaced lines.
- */
- active_count_ = 0;
force_ = 0.;
- indent_ = 0.0;
- default_space_ = 20 PT;
+ fits_ = true;
+}
+
+Real
+Simple_spacer::force ()
+{
+ return force_;
+}
+
+bool
+Simple_spacer::fits ()
+{
+ return fits_;
+}
+
+Real
+Simple_spacer::rod_force (int l, int r, Real dist)
+{
+ Real c = range_stiffness (l, r);
+ Real d = range_ideal_len (l, r);
+ Real block_stretch = dist - d;
+ return c * block_stretch;
}
void
return;
}
- Real c = range_stiffness (l, r);
- if (isinf (c))
+ Real block_force = rod_force (l, r, dist);
+
+ if (isinf (block_force))
{
- /*
- If a spring is fixed, we have to do something here:
- we let the rod override the spring.
- */
- Real total_dist = 0.;
- for (int i = l; i < r; i++)
- total_dist += springs_[i].ideal_;
-
- if (total_dist < dist)
+ Real spring_dist = range_ideal_len (l, r);
+ if (spring_dist < dist)
for (int i = l; i < r; i++)
- springs_[i].ideal_ *= dist / total_dist;
+ springs_[i].ideal_ *= dist / spring_dist;
return;
}
-
- Real d = range_ideal_len (l, r);
- Real block_stretch = dist - d;
-
- Real block_force = c * block_stretch;
force_ = max (force_, block_force);
-
for (int i = l; i < r; i++)
springs_[i].block_force_ = max (block_force, springs_[i].block_force_);
}
{
Real den = 0.0;
for (int i = l; i < r; i++)
- {
- if (springs_[i].is_active_)
- den += 1 * springs_[i].inverse_hooke_;
- }
+ den += springs_[i].inverse_hooke_;
return 1 / den;
}
Real
-Simple_spacer::active_blocking_force () const
+Simple_spacer::configuration_length () const
{
- Real bf = -infinity_f;
+ Real l = 0.;
for (vsize i = 0; i < springs_.size (); i++)
- if (springs_[i].is_active_)
- bf = max (bf, springs_[i].block_force_);
- return bf;
+ l += springs_[i].length (force_);
+
+ return l;
}
-Real
-Simple_spacer::active_springs_stiffness () const
+void
+Simple_spacer::solve (Real line_len, bool ragged)
{
- Real stiff = range_stiffness (0, springs_.size ());
- if (isinf (stiff))
- {
- /*
- all springs are inactive. Take the stiffness of the
- latest spring to block.
- */
-
- Real max_block_force = -infinity_f;
- int max_i = -1;
- for (vsize i = 0; i < springs_.size (); i++)
- {
- if (springs_[i].block_force_ > max_block_force)
- {
- max_i = i;
- max_block_force = springs_[i].block_force_;
- }
- }
+ Real conf = configuration_length ();
- stiff = 1/springs_[max_i].inverse_hooke_;
+ ragged_ = ragged;
+ line_len_ = line_len;
+ if (ragged)
+ {
+ force_ = 0;
+ fits_ = configuration_length () <= line_len_;
+ /* we need to calculate a force here to prevent a bunch of short lines */
+ if (fits_)
+ force_ = expand_line ();
}
- return stiff;
+ else if (conf < line_len_)
+ force_ = expand_line ();
+ else if (conf > line_len_)
+ force_ = compress_line ();
}
-void
-Simple_spacer::set_active_states ()
+Real
+Simple_spacer::expand_line ()
{
- /* float comparison is safe, since force is only copied. */
- for (vsize i = 0; i < springs_.size (); i++)
- if (springs_[i].is_active_
- && springs_[i].block_force_ >= force_)
- {
- springs_[i].is_active_ = false;
- active_count_--;
- }
+ double inv_hooke = 0;
+ double cur_len = configuration_length ();
+
+ fits_ = true;
+ for (vsize i=0; i < springs_.size (); i++)
+ inv_hooke += springs_[i].inverse_hooke_;
+
+ assert (cur_len <= line_len_);
+ return (line_len_ - cur_len) / inv_hooke + force_;
}
Real
-Simple_spacer::configuration_length () const
+Simple_spacer::compress_line ()
{
- Real l = 0.;
- for (vsize i = 0; i < springs_.size (); i++)
- l += springs_[i].length (force_);
+ double inv_hooke = 0;
+ double cur_len = configuration_length ();
+ double cur_force = force_;
- return l;
-}
+ fits_ = true;
+ for (vsize i=0; i < springs_.size (); i++)
+ inv_hooke += springs_[i].inverse_hooke_;
-bool
-Simple_spacer::is_active () const
-{
- return active_count_;
-}
+ assert (line_len_ <= cur_len);
-void
-Simple_spacer::my_solve_linelen ()
-{
- while (is_active ())
+ vector<Spring_description> sorted_springs = springs_;
+ sort (sorted_springs.begin (), sorted_springs.end (), greater<Spring_description> ());
+ for (vsize i = 0; i < sorted_springs.size (); i++)
{
- force_ = active_blocking_force ();
- Real conf = configuration_length ();
+ Spring_description sp = sorted_springs[i];
- if (conf < line_len_)
- {
- force_ += (line_len_ - conf) * active_springs_stiffness ();
- break;
- }
- else
- set_active_states ();
+ assert (sp.block_force_ <= cur_force);
+ if (isinf (sp.block_force_))
+ break;
+
+ double block_dist = (cur_force - sp.block_force_) * inv_hooke;
+ if (cur_len - block_dist <= line_len_)
+ return cur_force + (line_len_ - cur_len) / inv_hooke;
+ cur_len -= block_dist;
+ inv_hooke -= sp.inverse_hooke_;
+ cur_force = sp.block_force_;
}
+
+ fits_ = false;
+ return cur_force;
}
void
-Simple_spacer::my_solve_natural_len ()
+Simple_spacer::add_spring (Real ideal, Real inverse_hooke)
{
- Real line_len_force = 0.0;
+ Spring_description desc;
- while (is_active ())
+ desc.ideal_ = ideal;
+ desc.inverse_hooke_ = inverse_hooke;
+ if (!desc.is_sane ())
{
- force_ = max (active_blocking_force (), 0.0);
- Real conf = configuration_length ();
+ programming_error ("insane spring found, setting to unit");
- if (conf < line_len_)
- {
- line_len_force = force_
- + (line_len_ - conf)
- * active_springs_stiffness ();
- }
+ desc.inverse_hooke_ = 1.0;
+ desc.ideal_ = 1.0;
+ }
- if (force_ < 1e-8) // ugh.,
- break;
+ desc.block_force_ = -desc.ideal_ / desc.inverse_hooke_;
+ // block at distance 0
- set_active_states ();
- }
+ springs_.push_back (desc);
+}
+
+vector<Real>
+Simple_spacer::spring_positions () const
+{
+ vector<Real> ret;
+ ret.push_back (0.);
- force_ = line_len_force;
+ for (vsize i = 0; i < springs_.size (); i++)
+ ret.push_back (ret.back () + springs_[i].length (ragged_ ? 0.0 : force_));
+ return ret;
}
/****************************************************************/
{
ideal_ = 0.0;
inverse_hooke_ = 0.0;
- is_active_ = true;
block_force_ = 0.0;
}
Real
Spring_description::length (Real f) const
{
- if (!is_active_)
- f = block_force_;
- return ideal_ + f * inverse_hooke_;
+ return ideal_ + max (f, block_force_) * inverse_hooke_;
}
+
/****************************************************************/
/*
The ## forces the notes apart; we shouldn't allow the O's to touch
this closely.
*/
-void
-Simple_spacer_wrapper::solve (Column_x_positions *positions, bool ragged)
+
+struct Rod_desc
{
- if (ragged)
- spacer_->my_solve_natural_len ();
- else
- spacer_->my_solve_linelen ();
+ vsize r_;
+ Real dist_;
+
+ bool operator< (const Rod_desc r)
+ {
+ return r_ < r.r_;
+ }
+
+ Rod_desc () {}
+ Rod_desc (vsize r, Real d)
+ {
+ r_ = r;
+ dist_ = d;
+ }
+};
+
+struct Column_desc
+{
+ vector<Rod_desc> rods_;
+ vector<Rod_desc> end_rods_; /* use these if they end at the last column of the line */
+ Real ideal_;
+ Real inverse_hooke_;
+ Real end_ideal_;
+ Real end_inverse_hooke_;
+ Interval keep_inside_line_;
+};
+
+static int compare_paper_column_rank (Grob *const &a, Grob *const &b);
+
+static bool
+is_loose (Grob *g)
+{
+ return (scm_is_pair (g->get_object ("between-cols")));
+}
- positions->force_ = spacer_->force_;
+static Grob*
+maybe_find_prebroken_piece (Grob *g, Direction d)
+{
+ Grob *ret = dynamic_cast<Item*> (g)->find_prebroken_piece (d);
+ if (ret)
+ return ret;
+ return g;
+}
- /*
- We used to have a penalty for compression, no matter what, but that
- fucked up wtk1-fugue2 (taking 3 full pages.)
- */
- positions->config_.push_back (spacer_->indent_);
- for (vsize i = 0; i < spacer_->springs_.size (); i++)
- {
- Real l = spacer_->springs_[i].length ((ragged) ? 0.0 : spacer_->force_);
- positions->config_.push_back (positions->config_.back () + l);
- /*
- we have l>= 0 here, up to rounding errors
- */
- }
+static Grob*
+next_spaceable_column (vector<Grob*> const &list, vsize starting)
+{
+ for (vsize i = starting+1; i < list.size (); i++)
+ if (!is_loose (list[i]))
+ return list[i];
+ return 0;
+}
- /*
- For raggedright, we must have a measure of music density: this is
- to prevent lots of short lines (which all have force = 0).
- */
- if (ragged)
+/* this only returns non-NULL if the line-ending column is the next
+ spaceable-or-breakable column */
+static Grob*
+next_line_ending_column (vector<Grob*> const &list, vsize starting)
+{
+ vsize i = starting + 1;
+ for (; i < list.size ()
+ && is_loose (list[i])
+ && !Item::is_breakable (list[i]);
+ i++)
+ ;
+ return dynamic_cast<Item*> (list[i])->find_prebroken_piece (LEFT);
+}
+
+static void
+get_column_spring (Grob *this_col, Grob *next_col, Real *ideal, Real *inv_hooke)
+{
+ Spring_smob *spring = 0;
+
+ for (SCM s = this_col->get_object ("ideal-distances");
+ !spring && scm_is_pair (s);
+ s = scm_cdr (s))
{
- positions->satisfies_constraints_
- = positions->config_.back () < spacer_->line_len_;
+ Spring_smob *sp = unsmob_spring (scm_car (s));
+
+ if (sp->other_ == next_col)
+ spring = sp;
}
- else
- positions->satisfies_constraints_ = spacer_->is_active ();
- positions->cols_ = spaced_cols_;
- positions->loose_cols_ = loose_cols_;
+ if (!spring)
+ programming_error (_f ("No spring between column %d and next one",
+ Paper_column::get_rank (this_col)));
- /*
- Check if breaking constraints are met.
- */
- bool break_satisfy = true;
- int sz = positions->cols_.size ();
- for (int i = sz; i--;)
+ *ideal = (spring) ? spring->distance_ : 5.0;
+ *inv_hooke = (spring) ? spring->inverse_strength_ : 1.0;
+}
+
+static Column_desc
+get_column_desc (vector<Grob*> const &cols, vsize col_index, bool line_starter)
+{
+ Grob *col = cols[col_index];
+ if (line_starter)
+ col = maybe_find_prebroken_piece (col, RIGHT);
+
+ Column_desc desc;
+ Grob *next_col = next_spaceable_column (cols, col_index);
+ if (next_col)
+ get_column_spring (col, next_col, &desc.ideal_, &desc.inverse_hooke_);
+ Grob *end_col = next_line_ending_column (cols, col_index);
+ if (end_col)
+ get_column_spring (col, end_col, &desc.end_ideal_, &desc.end_inverse_hooke_);
+
+ for (SCM s = Spaceable_grob::get_minimum_distances (col);
+ scm_is_pair (s); s = scm_cdr (s))
{
- SCM p = positions->cols_[i]->get_property ("penalty");
- if (scm_is_number (p))
+ Grob *other = unsmob_grob (scm_caar (s));
+ vsize j = binary_search (cols, other, &compare_paper_column_rank, col_index);
+ if (j != VPOS)
{
- if (scm_to_double (p) < -9999)
- break_satisfy = break_satisfy && (i == 0 || i == sz -1);
- if (scm_to_double (p) > 9999)
- break_satisfy = break_satisfy && ! (i == 0 || i == sz -1);
+ if (cols[j] == other)
+ desc.rods_.push_back (Rod_desc (j, scm_to_double (scm_cdar (s))));
+ else /* it must end at the LEFT prebroken_piece */
+ desc.end_rods_.push_back (Rod_desc (j, scm_to_double (scm_cdar (s))));
}
}
-
- positions->satisfies_constraints_
- = positions->satisfies_constraints_ && break_satisfy;
+ if (!line_starter && to_boolean (col->get_property ("keep-inside-line")))
+ desc.keep_inside_line_ = col->extent (col, X_AXIS);
+ return desc;
}
-void
-Simple_spacer::add_spring (Real ideal, Real inverse_hooke)
+vector<Real>
+get_line_forces (vector<Grob*> const &icols, vector<vsize> breaks,
+ Real line_len, Real indent, bool ragged)
{
- Spring_description desc;
+ vector<Real> force;
+ force.resize (breaks.size () * breaks.size ());
- desc.ideal_ = ideal;
- desc.inverse_hooke_ = inverse_hooke;
- if (!desc.is_sane ())
+ vector<Column_desc> cols;
+ vsize b = 1;
+ cols.push_back (Column_desc ());
+ for (vsize i = 1; i < icols.size () - 1; i++)
{
- programming_error ("insane spring found, setting to unit");
-
- desc.inverse_hooke_ = 1.0;
- desc.ideal_ = 1.0;
+ if (b < breaks.size () && breaks[b] == i)
+ {
+ breaks[b] = cols.size ();
+ b++;
+ }
+ if (!is_loose (icols[i]))
+ cols.push_back (get_column_desc (icols, i, false));
}
+ breaks.back () = cols.size () - 1;
- if (!inverse_hooke)
- desc.is_active_ = false;
- else
+ for (vsize b = 0; b < breaks.size () - 1; b++)
{
- /*
- desc.is_active_ ?
- */
- desc.block_force_ = -desc.ideal_ / desc.inverse_hooke_;
- // block at distance 0
+ cols[breaks[b]] = get_column_desc (icols, breaks[b], true);
+ vsize st = breaks[b];
- active_count_++;
- }
- springs_.push_back (desc);
-}
+ for (vsize c = b+1; c < breaks.size (); c++)
+ {
+ vsize end = breaks[c];
+ Simple_spacer spacer;
-static int
-compare_paper_column_rank (Grob *const &a,
- Grob *const &b)
-{
- return Paper_column::get_rank (a) - Paper_column::get_rank (b);
+ for (vsize i = breaks[b]; i < end - 1; i++)
+ spacer.add_spring (cols[i].ideal_, cols[i].inverse_hooke_);
+ spacer.add_spring (cols[end-1].end_ideal_, cols[end-1].inverse_hooke_);
+
+
+ for (vsize i = breaks[b]; i < end; i++)
+ {
+ for (vsize r = 0; r < cols[i].rods_.size (); r++)
+ if (cols[i].rods_[r].r_ < end)
+ spacer.add_rod (i - st, cols[i].rods_[r].r_ - st, cols[i].rods_[r].dist_);
+ for (vsize r = 0; r < cols[i].end_rods_.size (); r++)
+ if (cols[i].end_rods_[r].r_ == end)
+ spacer.add_rod (i - st, end - st, cols[i].end_rods_[r].dist_);
+ if (!cols[i].keep_inside_line_.is_empty ())
+ {
+ spacer.add_rod (i - st, end - st, cols[i].keep_inside_line_[RIGHT]);
+ spacer.add_rod (0, i - st, cols[i].keep_inside_line_[LEFT]);
+ }
+ }
+ spacer.solve ((b == 0) ? line_len - indent : line_len, ragged);
+ force[b * breaks.size () + c] = spacer.force ();
+ if (!spacer.fits ())
+ {
+ force[b * breaks.size () + c] = infinity_f;
+ break;
+ }
+ }
+ }
+ return force;
}
-void
-Simple_spacer_wrapper::add_columns (vector<Grob*> const &icols)
+Column_x_positions
+get_line_configuration (vector<Grob*>const &columns,
+ Real line_len,
+ Real indent,
+ bool ragged)
{
- vector<Grob*> cols (icols);
- cols.clear ();
+ vector<Column_desc> cols;
+ Simple_spacer spacer;
+ Column_x_positions ret;
- for (vsize i = 0; i < icols.size (); i++)
- if (scm_is_pair (icols[i]->get_object ("between-cols")))
- loose_cols_.push_back (icols[i]);
- else
- cols.push_back (icols[i]);
-
- spaced_cols_ = cols;
- for (vsize i = 0; i < cols.size () - 1; i++)
+ ret.cols_.push_back (dynamic_cast<Item*> (columns[0])->find_prebroken_piece (RIGHT));
+ for (vsize i = 1; i < columns.size () - 1; i++)
{
- Spring_smob *spring = 0;
+ if (is_loose (columns[i]))
+ ret.loose_cols_.push_back (columns[i]);
+ else
+ ret.cols_.push_back (columns[i]);
+ }
+ ret.cols_.push_back (dynamic_cast<Item*> (columns.back ())->find_prebroken_piece (LEFT));
- for (SCM s = cols[i]->get_object ("ideal-distances");
- !spring && scm_is_pair (s);
- s = scm_cdr (s))
- {
- Spring_smob *sp = unsmob_spring (scm_car (s));
+ cols.resize (ret.cols_.size () - 1);
- if (sp->other_ == cols[i + 1])
- spring = sp;
- }
+ /* since we've already put our line-ending column in the column list, we can ignore
+ the end_XXX_ fields of our column_desc */
+ for (vsize i = 0; i < cols.size (); i++)
+ {
+ cols[i] = get_column_desc (ret.cols_, i, i == 0);
+ spacer.add_spring (cols[i].ideal_, cols[i].inverse_hooke_);
+ }
+ for (vsize i = 0; i < cols.size (); i++)
+ for (vsize r = 0; r < cols[i].rods_.size (); r++)
+ spacer.add_rod (i, cols[i].rods_[r].r_, cols[i].rods_[r].dist_);
- if (!spring)
- programming_error (_f ("No spring between column %d and next one",
- Paper_column::get_rank (cols[i])));
+ spacer.solve (line_len, ragged);
+ ret.force_ = spacer.force ();
- Real ideal = (spring) ? spring->distance_ : spacer_->default_space_;
- Real inverse_hooke = (spring) ? spring->inverse_strength_ : 1.0;
+ /*
+ We used to have a penalty for compression, no matter what, but that
+ fucked up wtk1-fugue2 (taking 3 full pages.)
+ */
+ ret.config_ = spacer.spring_positions ();
+ for (vsize i = 0; i < ret.config_.size (); i++)
+ ret.config_[i] += indent;
- spacer_->add_spring (ideal, inverse_hooke);
- }
+ ret.satisfies_constraints_ = spacer.fits ();
- for (vsize i = 0; i < cols.size () - 1; i++)
+ /*
+ Check if breaking constraints are met.
+ */
+ int sz = ret.cols_.size ();
+ for (int i = sz; i--;)
{
- for (SCM s = Spaceable_grob::get_minimum_distances (cols[i]);
- scm_is_pair (s); s = scm_cdr (s))
- {
- Grob *other = unsmob_grob (scm_caar (s));
- vsize j = binary_search (cols, other, &compare_paper_column_rank);
- if (j != VPOS && cols[j] == other)
- spacer_->add_rod (i, j, scm_to_double (scm_cdar (s)));
- }
-
- if (i
- && to_boolean (cols[i]->get_property ("keep-inside-line")))
+ SCM p = ret.cols_[i]->get_property ("penalty");
+ if (scm_is_number (p))
{
- Interval e = cols[i]->extent (cols[i], X_AXIS);
- if (!e.is_empty ())
- {
- spacer_->add_rod (i, cols.size () - 1, e[RIGHT]);
- spacer_->add_rod (0, i, e[LEFT]);
- }
+ if (scm_to_double (p) < -9999)
+ ret.satisfies_constraints_ = ret.satisfies_constraints_ && (i == 0 || i == sz -1);
+ if (scm_to_double (p) > 9999)
+ ret.satisfies_constraints_ = ret.satisfies_constraints_ && ! (i == 0 || i == sz -1);
}
}
-}
-Simple_spacer_wrapper::Simple_spacer_wrapper ()
-{
- spacer_ = new Simple_spacer ();
+ return ret;
}
-Simple_spacer_wrapper::~Simple_spacer_wrapper ()
-{
- delete spacer_;
-}
-
-Simple_spacer_wrapper::Simple_spacer_wrapper (Simple_spacer_wrapper const &)
+static int
+compare_paper_column_rank (Grob *const &a,
+ Grob *const &b)
{
+ return Paper_column::get_rank (a) - Paper_column::get_rank (b);
}
{
for (vsize i = 0; i < breaking.size (); i++)
{
- System *system = dynamic_cast<System *> (clone (i));
- system->rank_ = i;
+ System *system = dynamic_cast<System *> (clone (broken_intos_.size ()));
+ system->rank_ = broken_intos_.size ();
vector<Grob*> c (breaking[i].cols_);
pscore_->typeset_system (system);
(void) g->get_property ("before-line-breaking");
}
- message (_ ("Calculating line breaks..."));
- progress_indication (" ");
-
for (vsize i = 0; i < all_elements_->size (); i++)
{
Grob *e = all_elements_->grob (i);
projects / lilypond.git / commitdiff