X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fcontext.cc;h=4d949e8379c0a02f34003794b7f5e62bf3ec0b80;hb=2d52187d5492ce7492c78fc8f1dca4aa7b702ba0;hp=d891aac163880ce72c92e3cef74edf9fa90be975;hpb=9c31b0d42a407a412a324a6586cfb0437de4bfd8;p=lilypond.git diff --git a/lily/context.cc b/lily/context.cc index d891aac163..4d949e8379 100644 --- a/lily/context.cc +++ b/lily/context.cc @@ -1,244 +1,427 @@ -/* - context.cc -- implement Context +/* + This file is part of LilyPond, the GNU music typesetter. + + Copyright (C) 2004--2012 Han-Wen Nienhuys - source file of the GNU LilyPond music typesetter + LilyPond is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - (c) 2004 Han-Wen Nienhuys + LilyPond is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . */ -#include "translator-group.hh" -#include "context-def.hh" #include "context.hh" -#include "warn.hh" -#include "music-output-def.hh" -#include "scm-hash.hh" -#include "main.hh" + +#include "context-def.hh" +#include "dispatcher.hh" +#include "global-context.hh" +#include "international.hh" #include "ly-smobs.icc" -#include "score-context.hh" +#include "main.hh" +#include "output-def.hh" +#include "profile.hh" +#include "program-option.hh" +#include "scm-hash.hh" +#include "translator-group.hh" +#include "warn.hh" bool Context::is_removable () const { - return context_list_ == SCM_EOL && ! iterator_count_ && - !dynamic_cast (this) - ; + return context_list_ == SCM_EOL && ! client_count_ + && !dynamic_cast (daddy_context_); } void Context::check_removal () { - for (SCM p = context_list_; gh_pair_p (p); p = gh_cdr (p)) + for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p)) { - Context *trg = unsmob_context (ly_car (p)); - - trg->check_removal (); - if (trg->is_removable ()) - { - recurse_over_translators (trg, &Translator::finalize, UP); - remove_context (trg); - } + Context *ctx = unsmob_context (scm_car (p)); + + ctx->check_removal (); + if (ctx->is_removable ()) + { + recurse_over_translators (ctx, &Translator::finalize, + &Translator_group::finalize, + UP); + send_stream_event (ctx, "RemoveContext", 0, 0); + } } } -Context::Context (Context const&) +Context::Context (Context const & /* src */) { assert (false); } -Scheme_hash_table* +Scheme_hash_table * Context::properties_dict () const { return Scheme_hash_table::unsmob (properties_scm_); } void -Context::add_context (Context*t) -{ - SCM ts = t->self_scm (); - context_list_ = gh_append2 (context_list_, - gh_cons (ts, SCM_EOL)); - - t->daddy_context_ = this; - if (!t->init_) - { - t->init_ = true; - - scm_gc_unprotect_object (ts); - Context_def * td = unsmob_context_def (t->definition_); - - /* - this can not move before add_context (), because \override - operations require that we are in the hierarchy. - */ - td->apply_default_property_operations (t); - - recurse_over_translators (t, &Translator::initialize, DOWN); - } +Context::add_context (Context *child) +{ + context_list_ = ly_append2 (context_list_, + scm_cons (child->self_scm (), SCM_EOL)); + + child->daddy_context_ = this; + this->events_below_->register_as_listener (child->events_below_); } Context::Context () { daddy_context_ = 0; - init_ = false; aliases_ = SCM_EOL; - iterator_count_ = 0; - implementation_ = SCM_EOL; + client_count_ = 0; + implementation_ = 0; properties_scm_ = SCM_EOL; accepts_list_ = SCM_EOL; context_list_ = SCM_EOL; definition_ = SCM_EOL; - + definition_mods_ = SCM_EOL; + event_source_ = 0; + events_below_ = 0; + ancestor_lookup_ = SCM_UNDEFINED; + smobify_self (); - properties_scm_ = (new Scheme_hash_table)->self_scm (); - scm_gc_unprotect_object (properties_scm_); + Scheme_hash_table *tab = new Scheme_hash_table; + properties_scm_ = tab->unprotect (); + event_source_ = new Dispatcher (); + event_source_->unprotect (); + events_below_ = new Dispatcher (); + events_below_->unprotect (); } +/* TODO: this shares code with find_create_context (). */ Context * -Context::find_context_below (SCM n, String id) +Context::create_unique_context (SCM name, string id, SCM operations) { - if ((is_alias (n) && (id_string_ == id || id.is_empty ()))) - return this; + /* + Don't create multiple score contexts. + */ + Global_context *gthis = dynamic_cast (this); + if (gthis && gthis->get_score_context ()) + return gthis->get_score_context ()->create_unique_context (name, id, operations); - Context* r = 0; - for (SCM p = context_list_; !r && gh_pair_p (p); p = ly_cdr (p)) + vector path = path_to_acceptable_context (name); + if (path.size ()) { - Context * t = unsmob_context (ly_car (p)); - - r = dynamic_cast (t)->find_context_below (n, id); + Context *current = this; + + // Iterate through the path and create all of the implicit contexts. + for (vsize i = 0; i < path.size (); i++) + { + SCM ops = SCM_EOL; + string id_str = "\\new"; + if (i == path.size () - 1) + { + ops = operations; + id_str = id; + } + current = current->create_context (path[i], + id_str, + ops); + } + + return current; } - return r; + /* + Don't go up to Global_context, because global goes down to the + Score context + */ + Context *ret = 0; + if (daddy_context_ && !dynamic_cast (daddy_context_)) + ret = daddy_context_->create_unique_context (name, id, operations); + else + { + warning (_f ("cannot find or create new `%s'", + ly_symbol2string (name).c_str ())); + ret = 0; + } + return ret; } - -Context* -Context::find_create_context (SCM n, String id, - SCM operations) +Context * +Context::find_create_context (SCM n, string id, SCM operations) { /* Don't create multiple score contexts. - */ - if (dynamic_cast (this) - && dynamic_cast (this)->get_score_context ()) - return get_score_context ()->find_create_context (n, id, operations); - - - Context * existing = find_context_below (n,id); - if (existing) + */ + Global_context *gthis = dynamic_cast (this); + if (gthis && gthis->get_score_context ()) + return gthis->get_score_context ()->find_create_context (n, id, operations); + + if (Context *existing = find_context_below (this, n, id)) return existing; if (n == ly_symbol2scm ("Bottom")) { - Context* tg = get_default_interpreter (); - tg->id_string_ = id; + Context *tg = get_default_interpreter (id); return tg; } - /* - TODO: use accepts_list_. - */ - Link_array path - = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ()); + vector path = path_to_acceptable_context (n); if (path.size ()) { - Context * current = this; + Context *current = this; // start at 1. The first one (index 0) will be us. - for (int i=0; i < path.size (); i++) - { - SCM ops = (i == path.size () -1) ? operations : SCM_EOL; + for (vsize i = 0; i < path.size (); i++) + { + SCM ops = (i == path.size () - 1) ? operations : SCM_EOL; - Context * new_group - = path[i]->instantiate (ops); + string this_id = ""; + if (i == path.size () - 1) + this_id = id; - if (i == path.size () -1) - { - new_group->id_string_ = id; - } - - current->add_context (new_group); - apply_property_operations (new_group, ops); - - current = new_group; - } + current = current->create_context (path[i], + this_id, + ops); + } return current; } /* - Don't go up to Global_context, because global goes down to - Score_context - */ + Don't go up to Global_context, because global goes down to the + Score context + */ Context *ret = 0; - if (daddy_context_ && !dynamic_cast (daddy_context_)) + if (daddy_context_ && !dynamic_cast (daddy_context_)) ret = daddy_context_->find_create_context (n, id, operations); else { - warning (_f ("Cannot find or create `%s' called `%s'", - ly_symbol2string (n).to_str0 (), id)); - ret =0; + warning (_f ("cannot find or create `%s' called `%s'", + ly_symbol2string (n).c_str (), id)); + ret = 0; } return ret; } +IMPLEMENT_LISTENER (Context, acknowledge_infant); +void +Context::acknowledge_infant (SCM sev) +{ + infant_event_ = unsmob_stream_event (sev); +} + +IMPLEMENT_LISTENER (Context, set_property_from_event); +void +Context::set_property_from_event (SCM sev) +{ + Stream_event *ev = unsmob_stream_event (sev); + + SCM sym = ev->get_property ("symbol"); + if (scm_is_symbol (sym)) + { + SCM val = ev->get_property ("value"); + bool ok = true; + if (val != SCM_EOL) + ok = type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")); + if (ok) + set_property (sym, val); + } +} + +IMPLEMENT_LISTENER (Context, unset_property_from_event); +void +Context::unset_property_from_event (SCM sev) +{ + Stream_event *ev = unsmob_stream_event (sev); + + SCM sym = ev->get_property ("symbol"); + type_check_assignment (sym, SCM_EOL, ly_symbol2scm ("translation-type?")); + unset_property (sym); +} + +/* + Creates a new context from a CreateContext event, and sends an + AnnounceNewContext event to this context. +*/ +IMPLEMENT_LISTENER (Context, create_context_from_event); +void +Context::create_context_from_event (SCM sev) +{ + Stream_event *ev = unsmob_stream_event (sev); + + string id = ly_scm2string (ev->get_property ("id")); + SCM ops = ev->get_property ("ops"); + SCM type_scm = ev->get_property ("type"); + string type = ly_symbol2string (type_scm); + + vector path = path_to_acceptable_context (type_scm); + + if (path.size () != 1) + { + programming_error (to_string ("Invalid CreateContext event: Cannot create %s context", type.c_str ())); + return; + } + Context_def *cdef = path[0]; + + Context *new_context = cdef->instantiate (ops); + + new_context->id_string_ = id; + + /* Register various listeners: + - Make the new context hear events that universally affect contexts + - connect events_below etc. properly */ + /* We want to be the first ones to hear our own events. Therefore, wait + before registering events_below_ */ + new_context->event_source ()-> + add_listener (GET_LISTENER (new_context->create_context_from_event), + ly_symbol2scm ("CreateContext")); + new_context->event_source ()-> + add_listener (GET_LISTENER (new_context->remove_context), + ly_symbol2scm ("RemoveContext")); + new_context->event_source ()-> + add_listener (GET_LISTENER (new_context->change_parent), + ly_symbol2scm ("ChangeParent")); + new_context->event_source ()-> + add_listener (GET_LISTENER (new_context->set_property_from_event), + ly_symbol2scm ("SetProperty")); + new_context->event_source ()-> + add_listener (GET_LISTENER (new_context->unset_property_from_event), + ly_symbol2scm ("UnsetProperty")); + + new_context->events_below_->register_as_listener (new_context->event_source_); + this->add_context (new_context); + + new_context->unprotect (); + + Context_def *td = unsmob_context_def (new_context->definition_); + + /* This cannot move before add_context (), because \override + operations require that we are in the hierarchy. */ + td->apply_default_property_operations (new_context); + apply_property_operations (new_context, ops); + + send_stream_event (this, "AnnounceNewContext", 0, + ly_symbol2scm ("context"), new_context->self_scm (), + ly_symbol2scm ("creator"), sev); +} + +vector +Context::path_to_acceptable_context (SCM name) const +{ + // The 'accepts elements in definition_mods_ is a list of ('accepts string), + // but the Context_def expects to see elements of the form ('accepts symbol). + SCM accepts = SCM_EOL; + for (SCM s = definition_mods_; scm_is_pair (s); s = scm_cdr (s)) + if (scm_caar (s) == ly_symbol2scm ("accepts")) + { + SCM elt = scm_list_2 (scm_caar (s), scm_string_to_symbol (scm_cadar (s))); + accepts = scm_cons (elt, accepts); + } + + return unsmob_context_def (definition_)->path_to_acceptable_context (name, + get_output_def (), + scm_reverse_x (accepts, SCM_EOL)); + +} + +Context * +Context::create_context (Context_def *cdef, + string id, + SCM ops) +{ + infant_event_ = 0; + /* TODO: This is fairly misplaced. We can fix this when we have taken out all + iterator specific stuff from the Context class */ + event_source_-> + add_listener (GET_LISTENER (acknowledge_infant), + ly_symbol2scm ("AnnounceNewContext")); + /* The CreateContext creates a new context, and sends an announcement of the + new context through another event. That event will be stored in + infant_event_ to create a return value. */ + send_stream_event (this, "CreateContext", 0, + ly_symbol2scm ("ops"), ops, + ly_symbol2scm ("type"), cdef->get_context_name (), + ly_symbol2scm ("id"), ly_string2scm (id)); + event_source_-> + remove_listener (GET_LISTENER (acknowledge_infant), + ly_symbol2scm ("AnnounceNewContext")); + + assert (infant_event_); + SCM infant_scm = infant_event_->get_property ("context"); + Context *infant = unsmob_context (infant_scm); + + if (!infant || infant->get_parent_context () != this) + { + programming_error ("create_context: can't locate newly created context"); + return 0; + } + + return infant; +} + /* Default child context as a SCM string, or something else if there is none. */ SCM -default_child_context_name (Context const *tg) +Context::default_child_context_name () const { - return gh_pair_p (tg->accepts_list_) - ? ly_car (scm_last_pair (tg->accepts_list_)) - : SCM_EOL; + return scm_is_pair (accepts_list_) + ? scm_car (accepts_list_) + : SCM_EOL; } - bool Context::is_bottom_context () const { - return !gh_symbol_p (default_child_context_name (this)); + return !scm_is_symbol (default_child_context_name ()); } -Context* -Context::get_default_interpreter () +Context * +Context::get_default_interpreter (string context_id) { if (!is_bottom_context ()) { - SCM nm = default_child_context_name (this); - SCM st = get_output_def ()->find_context_def (nm); + SCM nm = default_child_context_name (); + SCM st = find_context_def (get_output_def (), nm); + string name = ly_symbol2string (nm); Context_def *t = unsmob_context_def (st); if (!t) - { - warning (_f ("can't find or create: `%s'", ly_symbol2string (nm).to_str0 ())); - t = unsmob_context_def (this->definition_); - } - Context *tg = t->instantiate (SCM_EOL); - add_context (tg); - if (!tg->is_bottom_context ()) - return tg->get_default_interpreter (); - else - return tg; + { + warning (_f ("cannot find or create: `%s'", name.c_str ())); + t = unsmob_context_def (this->definition_); + } + + Context *tg = create_context (t, context_id, SCM_EOL); + return tg->get_default_interpreter (context_id); } return this; } /* PROPERTIES - */ -Context* -Context::where_defined (SCM sym) const +*/ +Context * +Context::where_defined (SCM sym, SCM *value) const { - if (properties_dict ()->contains (sym)) - { - return (Context*)this; - } +#ifndef NDEBUG + if (profile_property_accesses) + note_property_access (&context_property_lookup_table, sym); +#endif + + if (properties_dict ()->try_retrieve (sym, value)) + return (Context *)this; - return (daddy_context_) ? daddy_context_->where_defined (sym) : 0; + return (daddy_context_) ? daddy_context_->where_defined (sym, value) : 0; } /* @@ -247,25 +430,47 @@ Context::where_defined (SCM sym) const SCM Context::internal_get_property (SCM sym) const { - SCM val =SCM_EOL; +#ifndef NDEBUG + if (profile_property_accesses) + note_property_access (&context_property_lookup_table, sym); +#endif + + SCM val = SCM_EOL; if (properties_dict ()->try_retrieve (sym, &val)) return val; if (daddy_context_) return daddy_context_->internal_get_property (sym); - + return val; } +/* +Called by the send_stream_event macro. props is a 0-terminated array of +properties and corresponding values, interleaved. This method should not +be called from any other place than the send_stream_event macro. +*/ +void +Context::internal_send_stream_event (SCM type, Input *origin, SCM props[]) +{ + Stream_event *e = new Stream_event (make_event_class (type), origin); + for (int i = 0; props[i]; i += 2) + { + e->set_property (props[i], props[i + 1]); + } + event_source_->broadcast (e); + e->unprotect (); +} + bool Context::is_alias (SCM sym) const { if (sym == ly_symbol2scm ("Bottom") - && !gh_pair_p (accepts_list_)) + && !scm_is_pair (accepts_list_)) return true; if (sym == unsmob_context_def (definition_)->get_context_name ()) return true; - + return scm_c_memq (sym, aliases_) != SCM_BOOL_F; } @@ -275,64 +480,90 @@ Context::add_alias (SCM sym) aliases_ = scm_cons (sym, aliases_); } - +/* we don't (yet) instrument context properties */ +void +Context::instrumented_set_property (SCM sym, SCM val, const char *, int, const char *) +{ + internal_set_property (sym, val); +} void Context::internal_set_property (SCM sym, SCM val) { -#ifndef NDEBUG - if (internal_type_checking_global_b) - assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?"))); -#endif - - properties_dict ()->set (sym, val); + bool type_check_ok = type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")); + + if (do_internal_type_checking_global) + assert (type_check_ok); + + if (type_check_ok) + properties_dict ()->set (sym, val); } /* - TODO: look up to check whether we have inherited var? - */ + TODO: look up to check whether we have inherited var? +*/ void Context::unset_property (SCM sym) { properties_dict ()->remove (sym); } -/** - Remove a context from the hierarchy. +IMPLEMENT_LISTENER (Context, change_parent); +void +Context::change_parent (SCM sev) +{ + Stream_event *ev = unsmob_stream_event (sev); + Context *to = unsmob_context (ev->get_property ("context")); + + disconnect_from_parent (); + to->add_context (this); +} + +/* + Die. The next GC sweep should take care of the actual death. */ -Context * -Context::remove_context (Context*trans) +IMPLEMENT_LISTENER (Context, remove_context); +void +Context::remove_context (SCM) { - assert (trans); + /* ugh, the translator group should listen to RemoveContext events by itself */ + Translator_group *impl = implementation (); + if (impl) + impl->disconnect_from_context (); + disconnect_from_parent (); +} - context_list_ = scm_delq_x (trans->self_scm (), context_list_); - trans->daddy_context_ = 0; - return trans; +void +Context::disconnect_from_parent () +{ + daddy_context_->events_below_->unregister_as_listener (this->events_below_); + daddy_context_->context_list_ = scm_delq_x (this->self_scm (), daddy_context_->context_list_); + daddy_context_ = 0; } /* ID == "" means accept any ID. - */ +*/ Context * -find_context_below (Context * where, - String type, String id) +find_context_below (Context *where, + SCM type, string id) { - if (where->is_alias (ly_symbol2scm (type.to_str0 ()))) + if (where->is_alias (type)) { - if (id == "" || where->id_string_ == id) - return where; + if (id == "" || where->id_string () == id) + return where; } - - Context * found = 0; - for (SCM s = where->context_list_; - !found && gh_pair_p (s); s = gh_cdr (s)) + + Context *found = 0; + for (SCM s = where->children_contexts (); + !found && scm_is_pair (s); s = scm_cdr (s)) { - Context * tr = unsmob_context (gh_car (s)); + Context *tr = unsmob_context (scm_car (s)); found = find_context_below (tr, type, id); } - return found; + return found; } SCM @@ -341,114 +572,225 @@ Context::properties_as_alist () const return properties_dict ()->to_alist (); } -String -Context::context_name () const +SCM +Context::context_name_symbol () const { - Context_def * td = unsmob_context_def (definition_ ); - return ly_symbol2string (td->get_context_name ()); + Context_def *td = unsmob_context_def (definition_); + return td->get_context_name (); } +string +Context::context_name () const +{ + return ly_symbol2string (context_name_symbol ()); +} -Score_context* +Context * Context::get_score_context () const { - if (Score_context *sc =dynamic_cast ((Context*)this)) - return sc; - else if (daddy_context_) + if (daddy_context_) return daddy_context_->get_score_context (); else return 0; } -Music_output_def * +SCM +Context::make_event_class (SCM event_type) +{ + if (SCM_UNBNDP (ancestor_lookup_)) + ancestor_lookup_ = get_global_context ()->ancestor_lookup_; + return scm_hashq_ref (ancestor_lookup_, event_type, SCM_EOL); +} + +Output_def * Context::get_output_def () const { - return (daddy_context_) - ? daddy_context_->get_output_def () : 0; + return daddy_context_ ? daddy_context_->get_output_def () : 0; } Context::~Context () { - } Moment Context::now_mom () const { - return daddy_context_->now_mom (); + Context const *p = this; + while (p->daddy_context_) + p = p->daddy_context_; + + return p->now_mom (); } int Context::print_smob (SCM s, SCM port, scm_print_state *) { - Context *sc = (Context *) ly_cdr (s); - + Context *sc = (Context *) SCM_CELL_WORD_1 (s); + scm_puts ("#<", port); - scm_puts (classname (sc), port); - if (Context_def *d=unsmob_context_def (sc->definition_)) + scm_puts (sc->class_name (), port); + if (Context_def *d = unsmob_context_def (sc->definition_)) { scm_puts (" ", port); scm_display (d->get_context_name (), port); } - if (Context *td=dynamic_cast (sc)) + if (!sc->id_string_.empty ()) { scm_puts ("=", port); - scm_puts (td->id_string_.to_str0 (), port); + scm_puts (sc->id_string_.c_str (), port); } - scm_puts (" ", port); scm_display (sc->context_list_, port); scm_puts (" >", port); - + return 1; } SCM Context::mark_smob (SCM sm) { - Context * me = (Context*) SCM_CELL_WORD_1 (sm); - + Context *me = (Context *) SCM_CELL_WORD_1 (sm); + scm_gc_mark (me->context_list_); scm_gc_mark (me->aliases_); - scm_gc_mark (me->definition_); - scm_gc_mark (me->properties_scm_); + scm_gc_mark (me->definition_); + scm_gc_mark (me->definition_mods_); + scm_gc_mark (me->properties_scm_); scm_gc_mark (me->accepts_list_); - scm_gc_mark (me->implementation_); + + if (me->implementation_) + scm_gc_mark (me->implementation_->self_scm ()); + + if (me->event_source_) + scm_gc_mark (me->event_source_->self_scm ()); + + if (me->events_below_) + scm_gc_mark (me->events_below_->self_scm ()); + + scm_gc_mark (me->ancestor_lookup_); return me->properties_scm_; } IMPLEMENT_SMOBS (Context); IMPLEMENT_DEFAULT_EQUAL_P (Context); -IMPLEMENT_TYPE_P (Context,"ly:context?"); +IMPLEMENT_TYPE_P (Context, "ly:context?"); -bool -Context::try_music (Music* m) +Global_context * +Context::get_global_context () const { - Translator* t = unsmob_translator (implementation_); - if (!t) - return false; - - bool b = t->try_music (m); - if (!b && daddy_context_) - b = daddy_context_->try_music (m); + if (dynamic_cast ((Context *) this)) + return dynamic_cast ((Context *) this); - return b; + if (daddy_context_) + return daddy_context_->get_global_context (); + + programming_error ("no Global context"); + return 0; } +Context * +Context::get_parent_context () const +{ + return daddy_context_; +} -Global_context* -Context::get_global_context () const +/* + Ugh. Where to put this? +*/ +Rational +measure_length (Context const *context) { - if (dynamic_cast((Context*) this)) - return dynamic_cast ((Context*) this); + SCM l = context->get_property ("measureLength"); + Rational length (1); + if (unsmob_moment (l)) + length = unsmob_moment (l)->main_part_; + return length; +} - if (daddy_context_) - return daddy_context_->get_global_context (); +Moment +measure_position (Context const *context) +{ + SCM sm = context->get_property ("measurePosition"); - programming_error ("No Global context!"); - return 0; + Moment m = 0; + if (unsmob_moment (sm)) + { + m = *unsmob_moment (sm); + + if (m.main_part_ < Rational (0)) + { + Rational length (measure_length (context)); + while (m.main_part_ < Rational (0)) + m.main_part_ += length; + } + } + + return m; +} + +/* Finds the measure position after a note of length DUR that + begins at the current measure position. */ +Moment +measure_position (Context const *context, Duration const *dur) +{ + Moment pos = measure_position (context); + Rational dur_length = dur ? dur->get_length () : Rational (0); + + Moment end_pos = pos.grace_part_ < Rational (0) + ? Moment (pos.main_part_, pos.grace_part_ + dur_length) + : Moment (pos.main_part_ + dur_length, 0); + + return end_pos; +} + +int +measure_number (Context const *context) +{ + SCM barnum = context->get_property ("internalBarNumber"); + SCM smp = context->get_property ("measurePosition"); + + int bn = robust_scm2int (barnum, 0); + Moment mp = robust_scm2moment (smp, Moment (0)); + if (mp.main_part_ < Rational (0)) + bn--; + + return bn; +} + +void +set_context_property_on_children (Context *trans, SCM sym, SCM val) +{ + trans->set_property (sym, ly_deep_copy (val)); + for (SCM p = trans->children_contexts (); scm_is_pair (p); p = scm_cdr (p)) + { + Context *trg = unsmob_context (scm_car (p)); + set_context_property_on_children (trg, sym, ly_deep_copy (val)); + } +} + +bool +melisma_busy (Context *tr) +{ + SCM melisma_properties = tr->get_property ("melismaBusyProperties"); + bool busy = false; + + for (; !busy && scm_is_pair (melisma_properties); + melisma_properties = scm_cdr (melisma_properties)) + busy = busy || to_boolean (tr->internal_get_property (scm_car (melisma_properties))); + + return busy; +} + +bool +check_repeat_count_visibility (Context const *context, SCM count) +{ + SCM proc = context->get_property ("repeatCountVisibility"); + return (ly_is_procedure (proc) + && to_boolean (scm_call_2 (proc, + count, + context->self_scm ()))); }