2 paper-book.cc -- implement Paper_book
4 source file of the GNU LilyPond music typesetter
6 (c) 2004 Jan Nieuwenhuizen <janneke@gnu.org>
12 #include "ly-module.hh"
14 #include "paper-book.hh"
15 #include "paper-def.hh"
16 #include "paper-outputter.hh"
17 #include "paper-line.hh"
18 #include "paper-score.hh"
21 static Real const MIN_COVERAGE = 0.66;
24 stencil2line (Stencil* stil, bool is_title = false)
28 z = scm_permanent_object (ly_offset2scm (Offset (0, 0)));
29 Offset dim = Offset (stil->extent (X_AXIS).length (),
30 stil->extent (Y_AXIS).length ());
31 Paper_line *pl = new Paper_line (dim, scm_cons (stil->smobbed_copy (),
33 return pl->self_scm ();
36 /* Simplistic page interface */
41 static int page_count_;
46 Protected_scm header_;
47 Protected_scm footer_;
48 Protected_scm copyright_;
49 Protected_scm tagline_;
51 Stencil *get_header () { return unsmob_stencil (header_); }
52 Stencil *get_copyright () { return unsmob_stencil (copyright_); }
53 Stencil *get_tagline () { return unsmob_stencil (tagline_); }
54 Stencil *get_footer () { return unsmob_stencil (footer_); }
56 /* actual height filled with text. */
59 // HMMM all this size stuff to paper/paper-outputter?
69 /* available area for text. */
72 Page (Paper_def*, int);
73 void output (Paper_outputter*, bool);
76 int Page::page_count_ = 0;
78 Page::Page (Paper_def *paper, int number)
88 hsize_ = paper->get_realvar (ly_symbol2scm ("hsize"));
89 vsize_ = paper->get_realvar (ly_symbol2scm ("vsize"));
90 top_margin_ = paper->get_realvar (ly_symbol2scm ("top-margin"));
91 bottom_margin_ = paper->get_realvar (ly_symbol2scm ("bottom-margin"));
92 head_sep_ = paper->get_realvar (ly_symbol2scm ("head-sep"));
93 foot_sep_ = paper->get_realvar (ly_symbol2scm ("foot-sep"));
94 text_width_ = paper->get_realvar (ly_symbol2scm ("linewidth"));
95 left_margin_ = (hsize_ - text_width_) / 2;
100 SCM make_header = scm_primitive_eval (ly_symbol2scm ("make-header"));
101 SCM make_footer = scm_primitive_eval (ly_symbol2scm ("make-footer"));
103 header_ = scm_call_2 (make_header, paper_->self_scm (),
104 scm_int2num (number_));
105 // FIXME: why does this (generates Stencil) not trigger font load?
107 get_header ()->align_to (Y_AXIS, UP);
109 footer_ = scm_call_2 (make_footer, paper_->self_scm (),
110 scm_int2num (number_));
112 get_footer ()->align_to (Y_AXIS, UP);
116 Page::output (Paper_outputter *out, bool is_last)
118 progress_indication ("[" + to_string (number_));
119 out->output_scheme (scm_list_1 (ly_symbol2scm ("start-page")));
120 Offset o (left_margin_, top_margin_);
121 Real vfill = line_count_ > 1 ? (text_height () - height_) / (line_count_ - 1)
124 Real coverage = height_ / text_height ();
125 if (coverage < MIN_COVERAGE)
126 /* Do not space out a badly filled page. This is too simplistic
127 (ie broken), because this should not vary too much between
128 (subsequent?) pages in a book. */
133 out->output_line (stencil2line (get_header ()), &o, false);
134 o[Y_AXIS] += head_sep_;
136 for (SCM s = lines_; s != SCM_EOL; s = ly_cdr (s))
138 SCM line = ly_car (s);
139 out->output_line (line, &o,
140 is_last && ly_cdr (s) != SCM_EOL && !get_copyright ()
141 && !get_tagline () && !get_footer ());
143 /* Do not put vfill between title and its music, */
144 if (scm_pair_p (ly_cdr (s)) && !unsmob_paper_line (line)->is_title ())
146 /* rather put extra just before the title. */
147 if (ly_cdr (s) != SCM_EOL
148 && unsmob_paper_line (ly_cadr (s))->is_title ())
152 o[Y_AXIS] = vsize_ - bottom_margin_;
153 if (get_copyright ())
154 o[Y_AXIS] -= get_copyright ()->extent (Y_AXIS).length ();
156 o[Y_AXIS] -= get_tagline ()->extent (Y_AXIS).length ();
158 o[Y_AXIS] -= get_footer ()->extent (Y_AXIS).length ();
160 if (get_copyright ())
161 out->output_line (stencil2line (get_copyright ()), &o,
162 is_last && !get_tagline () && !get_footer ());
164 out->output_line (stencil2line (get_tagline ()), &o,
165 is_last && !get_footer ());
167 out->output_line (stencil2line (get_footer ()), &o, is_last);
168 out->output_scheme (scm_list_2 (ly_symbol2scm ("stop-page"),
169 gh_bool2scm (is_last && !get_footer ())));
170 progress_indication ("]");
176 Real h = vsize_ - top_margin_ - bottom_margin_;
178 h -= get_header ()->extent (Y_AXIS).length () + head_sep_;
179 if (get_copyright () || get_tagline () || get_footer ())
181 if (get_copyright ())
182 h -= get_copyright ()->extent (Y_AXIS).length ();
184 h -= get_tagline ()->extent (Y_AXIS).length ();
186 h -= get_footer ()->extent (Y_AXIS).length ();
190 /****************************************************************/
192 /* Current global paper book. Gives default_rendering access from
193 input-file-results. */
194 Paper_book *paper_book;
196 Paper_book::Paper_book ()
198 copyright_ = SCM_EOL;
204 Paper_book::~Paper_book ()
208 #include "ly-smobs.icc"
210 IMPLEMENT_DEFAULT_EQUAL_P (Paper_book);
211 IMPLEMENT_SMOBS (Paper_book)
212 IMPLEMENT_TYPE_P (Paper_book, "ly:paper-book?")
215 Paper_book::mark_smob (SCM smob)
217 Paper_book *pb = (Paper_book*) SCM_CELL_WORD_1 (smob);
218 for (int i = 0; i < pb->headers_.size (); i++)
219 scm_gc_mark (pb->headers_[i]);
220 for (int i = 0; i < pb->global_headers_.size (); i++)
221 scm_gc_mark (pb->global_headers_[i]);
222 for (int i = 0; i < pb->papers_.size (); i++)
223 scm_gc_mark (pb->papers_[i]->self_scm ());
224 for (int i = 0; i < pb->scores_.size (); i++)
225 scm_gc_mark (pb->scores_[i]);
227 scm_gc_mark (pb->copyright_);
233 Paper_book::print_smob (SCM smob, SCM port, scm_print_state*)
235 Paper_book *b = (Paper_book*) ly_cdr (smob);
237 scm_puts ("#<", port);
238 scm_puts (classname (b), port);
239 scm_puts (" ", port);
240 //scm_puts (b->, port);
241 scm_puts (">", port);
246 Paper_book::output (String outname)
248 if (!papers_.size ())
251 /* Generate all stencils to trigger font loads. */
252 Link_array<Page> *pages = this->pages ();
254 Paper_def *paper = papers_[0];
255 Paper_outputter *out = paper->get_paper_outputter (outname);
256 out->output_header (paper, scopes (0), pages->size ());
258 int page_count = pages->size ();
259 for (int i = 0; i < page_count; i++)
260 (*pages)[i]->output (out, i + 1 == page_count);
262 out->output_scheme (scm_list_1 (ly_symbol2scm ("end-output")));
263 progress_indication ("\n");
267 Paper_book::scopes (int i)
269 SCM scopes = SCM_EOL;
271 scopes = scm_cons (headers_[i], scopes);
272 if (global_headers_[i] && global_headers_[i] != headers_[i])
273 scopes = scm_cons (global_headers_[i], scopes);
278 Paper_book::title (int i)
280 SCM user_title = scm_primitive_eval (ly_symbol2scm ("user-title"));
281 SCM book_title = scm_primitive_eval (ly_symbol2scm ("book-title"));
282 SCM score_title = scm_primitive_eval (ly_symbol2scm ("score-title"));
283 SCM field = (i == 0 ? ly_symbol2scm ("bookTitle")
284 : ly_symbol2scm ("scoreTitle"));
287 SCM scopes = this->scopes (i);
288 SCM s = ly_modules_lookup (scopes, field);
289 if (s != SCM_UNDEFINED && scm_variable_bound_p (s) == SCM_BOOL_T)
290 title = unsmob_stencil (scm_call_2 (user_title,
291 papers_[0]->self_scm (),
292 scm_variable_ref (s)));
294 title = unsmob_stencil (scm_call_2 (i == 0 ? book_title : score_title,
295 papers_[0]->self_scm (),
298 title->align_to (Y_AXIS, UP);
304 Paper_book::classic_output (String outname)
306 int count = scores_.size ();
307 Paper_outputter *out = papers_.top ()->get_paper_outputter (outname);
308 out->output_header (papers_.top (), scopes (count - 1), 0);
310 int line_count = SCM_VECTOR_LENGTH ((SCM) scores_.top ());
311 for (int i = 0; i < line_count; i++)
312 out->output_line (scm_vector_ref ((SCM) scores_.top (), scm_int2num (i)),
313 0, i == line_count - 1);
315 out->output_scheme (scm_list_1 (ly_symbol2scm ("end-output")));
316 progress_indication ("\n");
320 /* calculate book height, #lines, stencils. */
324 int score_count = scores_.size ();
326 /* Calculate the full book height. Hmm, can't we cache system
327 heights while making stencils? */
329 for (int i = 0; i < score_count; i++)
331 Stencil *title = this->title (i);
333 height_ += title->extent (Y_AXIS).length ();
335 int line_count = SCM_VECTOR_LENGTH ((SCM) scores_[i]);
336 for (int j = 0; j < line_count; j++)
338 SCM s = scm_vector_ref ((SCM) scores_[i], scm_int2num (j));
339 height_ += unsmob_paper_line (s)->dim ()[Y_AXIS];
343 Paper_def *paper = papers_[0];
344 SCM scopes = this->scopes (0);
346 SCM make_tagline = scm_primitive_eval (ly_symbol2scm ("make-tagline"));
347 tagline_ = scm_call_2 (make_tagline, paper->self_scm (), scopes);
349 if (Stencil *s = unsmob_stencil (tagline_))
350 tag_height = s->extent (Y_AXIS).length ();
351 height_ += tag_height;
353 SCM make_copyright = scm_primitive_eval (ly_symbol2scm ("make-copyright"));
354 copyright_ = scm_call_2 (make_copyright, paper->self_scm (), scopes);
355 Real copy_height = 0;
356 if (Stencil *s = unsmob_stencil (copyright_))
357 copy_height = s->extent (Y_AXIS).length ();
358 height_ += copy_height;
364 int score_count = scores_.size ();
366 for (int i = 0; i < score_count; i++)
368 if (Stencil *title = this->title (i))
369 lines = ly_snoc (stencil2line (title, true), lines);
370 lines = scm_append (scm_list_2 (lines, scm_vector_to_list (scores_[i])));
374 for (SCM s = lines; s != SCM_EOL; s = ly_cdr (s))
375 unsmob_paper_line (ly_car (s))->number_ = ++i;
383 Page::page_count_ = 0;
384 Paper_def *paper = papers_[0];
385 Page *page = new Page (paper, 1);
387 Real text_height = page->text_height ();
389 Real copy_height = 0;
390 if (Stencil *s = unsmob_stencil (copyright_))
391 copy_height = s->extent (Y_AXIS).length ();
394 if (Stencil *s = unsmob_stencil (tagline_))
395 tag_height = s->extent (Y_AXIS).length ();
398 SCM proc = paper->get_scmvar ("page-breaking");
399 SCM breaks = scm_apply_0 (proc, scm_list_n (all,
400 gh_double2scm (height_),
401 gh_double2scm (text_height),
402 gh_double2scm (copy_height),
403 gh_double2scm (tag_height),
406 /* Copyright on first page. */
407 if (unsmob_stencil (copyright_))
408 page->copyright_ = copyright_;
410 Link_array<Page> *pages = new Link_array<Page>;
411 int page_count = SCM_VECTOR_LENGTH ((SCM) breaks);
413 for (int i = 0; i < page_count; i++)
416 page = new Page (paper, i+1);
417 int next = i + 1 < page_count
418 ? gh_scm2int (scm_vector_ref (breaks, gh_int2scm (i))) : 0;
419 while ((!next && all != SCM_EOL) || line <= next)
421 SCM s = ly_car (all);
422 page->lines_ = ly_snoc (s, page->lines_);
423 page->height_ += unsmob_paper_line (s)->dim ()[Y_AXIS];
431 /* Tagline on last page. */
432 if (unsmob_stencil (tagline_))
433 page->tagline_ = tagline_;
438 c_ragged_page_breaks (SCM lines, Real book_height, Real text_height,
439 Real first, Real last)
442 int page_count = int (book_height / text_height + 0.5);
443 SCM breaks = SCM_EOL;
444 Real page_height = text_height + first;
447 for (SCM s = lines; s != SCM_EOL; s = ly_cdr (s))
449 Paper_line *pl = unsmob_paper_line (ly_car (s));
450 if (!pl->is_title () && h < page_height)
452 h += pl->dim ()[Y_AXIS];
453 if (!pl->is_title () && h > page_height)
455 breaks = ly_snoc (gh_int2scm (number), breaks);
457 page_height = text_height + (page_number == page_count) * last;
460 if (ly_cdr (s) == SCM_EOL)
461 breaks = ly_snoc (gh_int2scm (pl->number_), breaks);
464 return scm_vector (breaks);
467 LY_DEFINE (ly_ragged_page_breaks, "ly:ragged-page-breaks",
468 5, 0, 0, (SCM lines, SCM book, SCM text, SCM first, SCM last),
469 "Return a vector with line numbers of page breaks.")
471 SCM_ASSERT_TYPE (scm_pair_p (lines), lines, SCM_ARG1, __FUNCTION__, "list");
472 SCM_ASSERT_TYPE (gh_number_p (book), book, SCM_ARG2, __FUNCTION__, "real");
473 SCM_ASSERT_TYPE (gh_number_p (text), text, SCM_ARG2, __FUNCTION__, "real");
474 SCM_ASSERT_TYPE (gh_number_p (first), first, SCM_ARG2, __FUNCTION__, "real");
475 SCM_ASSERT_TYPE (gh_number_p (last), last, SCM_ARG2, __FUNCTION__, "real");
477 return c_ragged_page_breaks (lines,
478 gh_scm2double (book), gh_scm2double (text),
479 gh_scm2double (first), gh_scm2double (last));