Line_details const &old = ret.back ();
Line_details compressed = orig[i];
/*
- "padding" is the padding below the current line. The padding below
- "old" (taking into account whether "old" is a title) is already
- accounted for in the extent of the compressed line. The padding
- below the compressed line, therefore, should depend on whether its
- bottom-most line is a title or not.
+ We must account for the padding between the lines that we are compressing.
+ The padding values come from "old," which is the upper system here. Note
+ the meaning of tight-spacing: if a system has tight-spacing, then the padding
+ _before_ it is ignored.
*/
Real padding = 0;
if (!orig[i].tight_spacing_)
padding = orig[i].title_ ? old.title_padding_ : old.padding_;
compressed.shape_ = old.shape_.piggyback (orig[i].shape_, padding);
+ compressed.first_refpoint_offset_ += compressed.shape_.rest_[UP] - old.shape_.rest_[UP];
compressed.space_ += old.space_;
compressed.inverse_hooke_ += old.inverse_hooke_;
return sys + 1; /* this page starts with a new System_spec */
}
-Page_breaking::Page_breaking (Paper_book *pb, Break_predicate is_break)
+Page_breaking::Page_breaking (Paper_book *pb, Break_predicate is_break, Prob_break_predicate prob_break)
{
book_ = pb;
system_count_ = 0;
}
create_system_list ();
- find_chunks_and_breaks (is_break);
+ find_chunks_and_breaks (is_break, prob_break);
}
Page_breaking::~Page_breaking ()
}
void
-Page_breaking::find_chunks_and_breaks (Break_predicate is_break)
+Page_breaking::find_chunks_and_breaks (Break_predicate is_break, Prob_break_predicate prob_is_break)
{
SCM force_sym = ly_symbol2scm ("force");
{
if (system_specs_[i].pscore_)
{
- vector<Grob*> cols;
+ vector<Grob*> cols = system_specs_[i].pscore_->root_system ()->used_columns ();
+ vector<Grob*> forced_line_break_cols;
SCM system_count = system_specs_[i].pscore_->layout ()->c_variable ("system-count");
if (scm_is_number (system_count))
Constrained_breaking breaking (system_specs_[i].pscore_);
vector<Line_details> details = breaking.line_details (0, VPOS, scm_to_int (system_count));
- cols.push_back (system_specs_[i].pscore_->root_system ()->used_columns ()[0]);
for (vsize j = 0; j < details.size (); j++)
- cols.push_back (details[j].last_column_);
+ forced_line_break_cols.push_back (details[j].last_column_);
}
- else
- cols = system_specs_[i].pscore_->root_system ()->used_columns ();
- int last_chunk_idx = 0;
+ int last_forced_line_break_idx = 0;
+ vsize forced_line_break_idx = 0;
vector<vsize> line_breaker_columns;
line_breaker_columns.push_back (0);
for (vsize j = 1; j < cols.size (); j++)
{
+ if (forced_line_break_cols.size ())
+ {
+ if (forced_line_break_idx >= forced_line_break_cols.size ()
+ || forced_line_break_cols[forced_line_break_idx] != cols[j])
+ continue;
+ else
+ forced_line_break_idx++;
+ }
+
bool last = (j == cols.size () - 1);
- bool break_point = is_break (cols[j]);
+ bool break_point = is_break && is_break (cols[j]);
bool chunk_end = cols[j]->get_property ("page-break-permission") == force_sym;
Break_position cur_pos = Break_position (i,
line_breaker_columns.size (),
// since it mixes Break_positions from breaks_ and
// chunks_.
if (scm_is_number (system_count))
- cur_pos.forced_line_count_ = j - last_chunk_idx;
+ cur_pos.forced_line_count_ = forced_line_break_idx - last_forced_line_break_idx;
if (break_point || (i == system_specs_.size () - 1 && last))
breaks_.push_back (cur_pos);
if (chunk_end || last)
{
chunks_.push_back (cur_pos);
- last_chunk_idx = j;
+ last_forced_line_break_idx = forced_line_break_idx;
}
if ((break_point || chunk_end) && !last)
}
else
{
- /* TODO: we want some way of applying Break_p to a prob? */
- if (i == system_specs_.size () - 1)
+ bool break_point = prob_is_break && prob_is_break (system_specs_[i].prob_);
+ if (break_point || i == system_specs_.size () - 1)
breaks_.push_back (Break_position (i));
chunks_.push_back (Break_position (i));
Real prev_hanging = 0;
Real prev_hanging_begin = 0;
Real prev_hanging_rest = 0;
+ Real prev_refpoint_hanging = 0;
for (vsize i = 0; i < cached_line_details_.size (); i++)
{
Line_shape shape = cached_line_details_[i].shape_;
Real a = shape.begin_[UP];
Real b = shape.rest_[UP];
- Real midline_hanging = max (prev_hanging_begin + a, prev_hanging_rest + b);
- Real hanging_begin = midline_hanging - shape.begin_[DOWN];
- Real hanging_rest = midline_hanging - shape.rest_[DOWN];
+ bool title = cached_line_details_[i].title_;
+ Real refpoint_hanging = max (prev_hanging_begin + a, prev_hanging_rest + b);
+
+ if (i > 0)
+ {
+ Real padding = 0;
+ if (!cached_line_details_[i].tight_spacing_)
+ padding = title
+ ? cached_line_details_[i-1].title_padding_
+ : cached_line_details_[i-1].padding_;
+ Real min_dist = title
+ ? cached_line_details_[i-1].title_min_distance_
+ : cached_line_details_[i-1].min_distance_;
+ refpoint_hanging = max (refpoint_hanging + padding,
+ prev_refpoint_hanging + min_dist
+ + cached_line_details_[i].first_refpoint_offset_);
+ }
+
+ Real hanging_begin = refpoint_hanging - shape.begin_[DOWN];
+ Real hanging_rest = refpoint_hanging - shape.rest_[DOWN];
Real hanging = max (hanging_begin, hanging_rest);
cached_line_details_[i].tallness_ = hanging - prev_hanging;
prev_hanging = hanging;
prev_hanging_begin = hanging_begin;
prev_hanging_rest = hanging_rest;
+ prev_refpoint_hanging = refpoint_hanging;
}
}
for (vsize i = 0; i < cached_line_details_.size (); i++)
{
- Real padding = 0;
Real ext_len;
if (cur_rod_height > 0)
- {
- if (!cached_line_details_[i].tight_spacing_)
- padding = (cached_line_details_[i].title_
- ? cached_line_details_[i - 1].title_padding_
- : cached_line_details_[i - 1].padding_);
- ext_len = cached_line_details_[i].tallness_;
- }
+ ext_len = cached_line_details_[i].tallness_;
else
- {
- ext_len = cached_line_details_[i].full_height();
- }
- Real next_rod_height = cur_rod_height + ext_len + padding;
+ ext_len = cached_line_details_[i].full_height();
+
+ Real next_rod_height = cur_rod_height + ext_len;
Real next_spring_height = cur_spring_height + cached_line_details_[i].space_;
Real next_height = next_rod_height + (ragged () ? next_spring_height : 0)
+ min_whitespace_at_bottom_of_page (cached_line_details_[i]);
p1.systems_per_page_.push_back (p2.systems_per_page_[0]);
p1.force_.push_back (p2.force_[0]);
p1.penalty_ += p2.penalty_ - cached_line_details_[i].turn_penalty_;
+ p1.system_count_status_ |= p2.system_count_status_;
return p1;
}