X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fcontext.cc;h=a614146058f55273bc2070d0976c356d10d346b7;hb=c1704191bebb32d7ffb4d2568f997697ac4b3d5c;hp=b1e4a6629de9589c28e907ae6cf4d4c3d482912b;hpb=31568c504806f35aac420a394c9eab07abd9faa7;p=lilypond.git diff --git a/lily/context.cc b/lily/context.cc index b1e4a6629d..a614146058 100644 --- a/lily/context.cc +++ b/lily/context.cc @@ -1,31 +1,42 @@ /* - context.cc -- implement Context + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 2004--2015 Han-Wen Nienhuys - (c) 2004--2006 Han-Wen Nienhuys + 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. + + 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 "context.hh" #include "context-def.hh" +#include "dispatcher.hh" +#include "global-context.hh" #include "international.hh" -#include "lilypond-key.hh" -#include "ly-smobs.icc" #include "main.hh" #include "output-def.hh" #include "profile.hh" #include "program-option.hh" #include "scm-hash.hh" -#include "score-context.hh" #include "translator-group.hh" #include "warn.hh" +#include "lily-imports.hh" bool Context::is_removable () const { - return context_list_ == SCM_EOL && ! iterator_count_ - && !dynamic_cast (this); + return scm_is_null (context_list_) && ! client_count_ + && !dynamic_cast (daddy_context_); } void @@ -33,157 +44,154 @@ Context::check_removal () { for (SCM p = context_list_; scm_is_pair (p); p = scm_cdr (p)) { - Context *trg = unsmob_context (scm_car (p)); - - trg->check_removal (); - if (trg->is_removable ()) - { - recurse_over_translators (trg, &Translator::finalize, - &Translator_group::finalize, - UP); - remove_context (trg); - } + Context *ctx = unsmob (scm_car (p)); + + ctx->check_removal (); + if (ctx->is_removable ()) + { + recurse_over_translators + (ctx, + Callback0_wrapper::make_smob + (), + Callback0_wrapper::make_smob + (), + UP); + send_stream_event (ctx, "RemoveContext", 0, 0); + } } } -Context::Context (Context const &) -{ - assert (false); -} - Scheme_hash_table * Context::properties_dict () const { - return Scheme_hash_table::unsmob (properties_scm_); + return unsmob (properties_scm_); } void -Context::add_context (Context *t) +Context::add_context (Context *child) { - SCM ts = t->self_scm (); context_list_ = ly_append2 (context_list_, - scm_cons (ts, SCM_EOL)); + scm_cons (child->self_scm (), SCM_EOL)); - t->daddy_context_ = this; - if (!t->init_) - { - t->init_ = true; - - t->unprotect (); - Context_def *td = unsmob_context_def (t->definition_); - - /* This cannot 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, - &Translator_group::initialize, - DOWN); - } + child->daddy_context_ = this; + events_below_->register_as_listener (child->events_below_); } - -Context::Context (Object_key const *key) +Context::Context () { - key_ = key; daddy_context_ = 0; - init_ = false; aliases_ = SCM_EOL; - iterator_count_ = 0; + client_count_ = 0; implementation_ = 0; properties_scm_ = SCM_EOL; accepts_list_ = SCM_EOL; + default_child_ = SCM_EOL; context_list_ = SCM_EOL; definition_ = SCM_EOL; + definition_mods_ = SCM_EOL; + event_source_ = 0; + events_below_ = 0; smobify_self (); - Scheme_hash_table *tab = new Scheme_hash_table; - properties_scm_ = tab->unprotect (); - - /* - UGH UGH - const correctness. - */ - if (key_) - ((Object_key *)key)->unprotect (); + properties_scm_ = Scheme_hash_table::make_smob (); + event_source_ = new Dispatcher (); + event_source_->unprotect (); + events_below_ = new Dispatcher (); + events_below_->unprotect (); } /* TODO: this shares code with find_create_context (). */ Context * -Context::create_unique_context (SCM n, SCM operations) +Context::create_unique_context (SCM name, const string &id, SCM operations) { /* Don't create multiple score contexts. */ - if (dynamic_cast (this) - && dynamic_cast (this)->get_score_context ()) - return get_score_context ()->create_unique_context (n, operations); - - /* - TODO: use accepts_list_. - */ - vector path - = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ()); + Global_context *gthis = dynamic_cast (this); + if (gthis && gthis->get_score_context ()) + return gthis->get_score_context ()->create_unique_context (name, id, operations); + vector path = path_to_acceptable_context (name); if (path.size ()) { Context *current = this; - // start at 1. The first one (index 0) will be us. + // Iterate through the path and create all of the implicit contexts. for (vsize i = 0; i < path.size (); i++) - { - SCM ops = (i == path.size () -1) ? operations : SCM_EOL; - - current = current->create_context (path[i], - "\\new", - ops); - } + { + 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; } /* - 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_)) - ret = daddy_context_->create_unique_context (n, operations); + ret = daddy_context_->create_unique_context (name, id, operations); else { - warning (_f ("can't find or create new `%s'", - ly_symbol2string (n).c_str ())); + 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::find_create_context (SCM n, const 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); + Global_context *gthis = dynamic_cast (this); + if (gthis) + { + if (gthis->get_score_context ()) + return gthis->get_score_context ()->find_create_context (n, id, operations); + + // Special case: If we use \set Timing.xxx = whatever before + // Score is established, the alias of Score to Timing will not + // be taken into account. We check for this particular case + // here. Aliases apart from Score-level ones don't warrant + // context creation as they could create unwanted contexts, like + // RhythmicVoice instead of Voice. Creating a Score context, + // however, can't really do anything wrong. + + SCM score_name = default_child_context_name (); + SCM score_def = find_context_def (get_output_def (), score_name); + + if (Context_def *cd = unsmob (score_def)) + { + if (cd->is_alias (n)) + return create_context (cd, id, operations); + } + } + if (Context *existing = find_context_below (this, n, id)) return existing; - if (n == ly_symbol2scm ("Bottom")) + if (scm_is_eq (n, ly_symbol2scm ("Bottom"))) { - Context *tg = get_default_interpreter (); + Context *tg = get_default_interpreter (id); return tg; } - /* - TODO: use accepts_list_. - */ - vector path - = unsmob_context_def (definition_)->path_to_acceptable_context (n, get_output_def ()); + vector path = path_to_acceptable_context (n); if (path.size ()) { @@ -191,101 +199,231 @@ Context::find_create_context (SCM n, string id, SCM operations) // start at 1. The first one (index 0) will be us. for (vsize i = 0; i < path.size (); i++) - { - SCM ops = (i == path.size () -1) ? operations : SCM_EOL; + { + SCM ops = (i == path.size () - 1) ? operations : SCM_EOL; - string this_id = ""; - if (i == path.size () -1) - this_id = id; + string this_id = ""; + if (i == path.size () - 1) + this_id = id; - current = current->create_context (path[i], - this_id, - ops); - } + 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_)) ret = daddy_context_->find_create_context (n, id, operations); else { - warning (_f ("can't find or create `%s' called `%s'", - ly_symbol2string (n).c_str (), id)); + warning (_f ("cannot find or create `%s' called `%s'", + ly_symbol2string (n).c_str (), id)); ret = 0; } return ret; } -Context * -Context::create_context (Context_def *cdef, - string id, - SCM ops) +void +Context::acknowledge_infant (SCM sev) { - string type = ly_symbol2string (cdef->get_context_name ()); - Object_key const *key = get_context_key (type, id); - Context *new_context - = cdef->instantiate (ops, key); - - new_context->id_string_ = id; - add_context (new_context); - apply_property_operations (new_context, ops); - - return new_context; + infant_event_ = unsmob (sev); } -Object_key const * -Context::get_context_key (string type, string id) +void +Context::set_property_from_event (SCM sev) { - if (!use_object_keys) - return 0; + Stream_event *ev = unsmob (sev); - string now_key = type + "@" + id; + SCM sym = ev->get_property ("symbol"); + if (scm_is_symbol (sym)) + { + SCM val = ev->get_property ("value"); + + if (SCM_UNBNDP (val)) { + unset_property (sym); + return; + } + + bool ok = true; + ok = type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")); + + if (ok) + { + if (to_boolean (ev->get_property ("once"))) + { + if (Global_context *g = get_global_context ()) + { + SCM old_val = SCM_UNDEFINED; + if (here_defined (sym, &old_val)) + g->add_finalization (scm_list_4 (ly_context_set_property_x_proc, + self_scm (), + sym, + old_val)); + else + g->add_finalization (scm_list_3 (ly_context_unset_property_proc, + self_scm (), + sym)); + } + } + set_property (sym, val); + } + } +} - int disambiguation_count = 0; - if (context_counts_.find (now_key) != context_counts_.end ()) - disambiguation_count = context_counts_[now_key]; +void +Context::unset_property_from_event (SCM sev) +{ + Stream_event *ev = unsmob (sev); - context_counts_[now_key] = disambiguation_count + 1; + SCM sym = ev->get_property ("symbol"); + bool ok = type_check_assignment (sym, SCM_EOL, ly_symbol2scm ("translation-type?")); - return new Lilypond_context_key (key (), - now_mom (), - type, id, - disambiguation_count); + if (ok) + { + if (to_boolean (ev->get_property ("once"))) + { + if (Global_context *g = get_global_context ()) + { + SCM old_val = SCM_UNDEFINED; + if (here_defined (sym, &old_val)) + g->add_finalization (scm_list_4 (ly_context_set_property_x_proc, + self_scm (), + sym, + old_val)); + else + g->add_finalization (scm_list_3 (ly_context_unset_property_proc, + self_scm (), + sym)); + } + } + unset_property (sym); + } } -Object_key const * -Context::get_grob_key (string name) +/* + Creates a new context from a CreateContext event, and sends an + AnnounceNewContext event to this context. +*/ +void +Context::create_context_from_event (SCM sev) { - if (!use_object_keys) - return 0; + Stream_event *ev = unsmob (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); - return create_grob_key (name); + 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 (new_context->GET_LISTENER (Context, create_context_from_event), + ly_symbol2scm ("CreateContext")); + new_context->event_source ()-> + add_listener (new_context->GET_LISTENER (Context, remove_context), + ly_symbol2scm ("RemoveContext")); + new_context->event_source ()-> + add_listener (new_context->GET_LISTENER (Context, change_parent), + ly_symbol2scm ("ChangeParent")); + new_context->event_source ()-> + add_listener (new_context->GET_LISTENER (Context, set_property_from_event), + ly_symbol2scm ("SetProperty")); + new_context->event_source ()-> + add_listener (new_context->GET_LISTENER (Context, unset_property_from_event), + ly_symbol2scm ("UnsetProperty")); + + new_context->events_below_->register_as_listener (new_context->event_source_); + add_context (new_context); + + new_context->unprotect (); + + Context_def *td = unsmob (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); } -/* - We want to have a key for some objects anyway, so we can invent a - unique identifier for each (book,score) tuple. -*/ -Object_key const * -Context::create_grob_key (string name) +vector +Context::path_to_acceptable_context (SCM name) const { - int disambiguation_count = 0; - if (grob_counts_.find (name) != grob_counts_.end ()) - disambiguation_count = grob_counts_[name]; - grob_counts_[name] = disambiguation_count + 1; + // 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_is_eq (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 (definition_)->path_to_acceptable_context (name, + get_output_def (), + scm_reverse_x (accepts, SCM_EOL)); + +} - Object_key *k = new Lilypond_grob_key (key (), - now_mom (), - name, - disambiguation_count); +Context * +Context::create_context (Context_def *cdef, + const 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 (Context, 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 (Context, acknowledge_infant), + ly_symbol2scm ("AnnounceNewContext")); + + assert (infant_event_); + SCM infant_scm = infant_event_->get_property ("context"); + Context *infant = unsmob (infant_scm); + + if (!infant || infant->get_parent_context () != this) + { + programming_error ("create_context: can't locate newly created context"); + return 0; + } - return k; + return infant; } /* @@ -295,9 +433,7 @@ Context::create_grob_key (string name) SCM Context::default_child_context_name () const { - return scm_is_pair (accepts_list_) - ? scm_car (accepts_list_) - : SCM_EOL; + return default_child_; } bool @@ -307,7 +443,7 @@ Context::is_bottom_context () const } Context * -Context::get_default_interpreter () +Context::get_default_interpreter (const string &context_id) { if (!is_bottom_context ()) { @@ -315,18 +451,25 @@ Context::get_default_interpreter () SCM st = find_context_def (get_output_def (), nm); string name = ly_symbol2string (nm); - Context_def *t = unsmob_context_def (st); + Context_def *t = unsmob (st); if (!t) - { - warning (_f ("can't find or create: `%s'", name.c_str ())); - t = unsmob_context_def (this->definition_); - } - - Context *tg = create_context (t, "", SCM_EOL); - 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 (definition_); + } + if (scm_is_symbol (t->get_default_child (SCM_EOL))) + { + Context *tg = create_context (t, "\\new", SCM_EOL); + return tg->get_default_interpreter (context_id); + } + return create_context (t, context_id, SCM_EOL); + } + else if (!context_id.empty () && context_id != id_string ()) + { + if (daddy_context_ && !dynamic_cast (daddy_context_)) + return daddy_context_->get_default_interpreter (context_id); + warning (_f ("cannot find or create new Bottom = \"%s\"", + context_id.c_str ())); } return this; } @@ -337,7 +480,7 @@ Context::get_default_interpreter () Context * Context::where_defined (SCM sym, SCM *value) const { -#ifndef NDEBUG +#ifdef DEBUG if (profile_property_accesses) note_property_access (&context_property_lookup_table, sym); #endif @@ -348,13 +491,26 @@ Context::where_defined (SCM sym, SCM *value) const return (daddy_context_) ? daddy_context_->where_defined (sym, value) : 0; } +/* Quick variant of where_defined. Checks only the context itself. */ + +bool +Context::here_defined (SCM sym, SCM *value) const +{ +#ifdef DEBUG + if (profile_property_accesses) + note_property_access (&context_property_lookup_table, sym); +#endif + + return properties_dict ()->try_retrieve (sym, value); +} + /* return SCM_EOL when not found. */ SCM Context::internal_get_property (SCM sym) const { -#ifndef NDEBUG +#ifdef DEBUG if (profile_property_accesses) note_property_access (&context_property_lookup_table, sym); #endif @@ -369,16 +525,32 @@ Context::internal_get_property (SCM sym) const 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 (Lily::ly_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") - && !scm_is_pair (accepts_list_)) - return true; - if (sym == unsmob_context_def (definition_)->get_context_name ()) + if (scm_is_eq (sym, ly_symbol2scm ("Bottom"))) + return is_bottom_context (); + if (scm_is_eq (sym, context_name_symbol ())) return true; - return scm_c_memq (sym, aliases_) != SCM_BOOL_F; + return scm_is_true (scm_c_memq (sym, aliases_)); } void @@ -387,15 +559,23 @@ 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 + bool type_check_ok = type_check_assignment (sym, val, ly_symbol2scm ("translation-type?")); + if (do_internal_type_checking_global) - assert (type_check_assignment (sym, val, ly_symbol2scm ("translation-type?"))); -#endif + assert (type_check_ok); - properties_dict ()->set (sym, val); + if (type_check_ok) + properties_dict ()->set (sym, val); } /* @@ -407,37 +587,72 @@ Context::unset_property (SCM sym) properties_dict ()->remove (sym); } -/** - Remove a context from the hierarchy. -*/ -Context * -Context::remove_context (Context *trans) +void +Context::change_parent (SCM sev) { - assert (trans); + Stream_event *ev = unsmob (sev); + Context *to = unsmob (ev->get_property ("context")); - context_list_ = scm_delq_x (trans->self_scm (), context_list_); - trans->daddy_context_ = 0; - return trans; + disconnect_from_parent (); + to->add_context (this); } /* - ID == "" means accept any ID. -*/ + Die. The next GC sweep should take care of the actual death. + */ +void +Context::remove_context (SCM) +{ + /* ugh, the translator group should listen to RemoveContext events by itself */ + Translator_group *impl = implementation (); + if (impl) + impl->disconnect_from_context (); + disconnect_from_parent (); +} + +void +Context::disconnect_from_parent () +{ + daddy_context_->events_below_->unregister_as_listener (events_below_); + daddy_context_->context_list_ = scm_delq_x (self_scm (), daddy_context_->context_list_); + daddy_context_ = 0; +} + +Context * +find_context_above (Context *where, SCM type) +{ + while (where && !where->is_alias (type)) + where = where->get_parent_context (); + + return where; +} + +Context * +find_context_above_by_parent_type (Context *where, SCM parent_type) +{ + for (Context *child = 0; where; + child = where, where = where->get_parent_context ()) + if (where->is_alias (parent_type)) + return child; + + return 0; +} + Context * find_context_below (Context *where, - SCM type, string id) + SCM type, const string &id) { if (where->is_alias (type)) { if (id == "" || where->id_string () == id) - return where; + return where; } Context *found = 0; for (SCM s = where->children_contexts (); !found && scm_is_pair (s); s = scm_cdr (s)) { - Context *tr = unsmob_context (scm_car (s)); + Context *tr = unsmob (scm_car (s)); found = find_context_below (tr, type, id); } @@ -445,6 +660,29 @@ find_context_below (Context *where, return found; } +Context * +find_context_near (Context *where, + SCM type, const string &id) +{ + for ( ; where; where = where->get_parent_context ()) + { + Context *found = find_context_below (where, type, id); + if (found) + return found; + } + + return 0; +} + +Context * +find_top_context (Context *where) +{ + Context *top = where; + for ( ; where; where = where->get_parent_context()) + top = where; + return top; +} + SCM Context::properties_as_alist () const { @@ -454,7 +692,7 @@ Context::properties_as_alist () const SCM Context::context_name_symbol () const { - Context_def *td = unsmob_context_def (definition_); + Context_def *td = unsmob (definition_); return td->get_context_name (); } @@ -464,12 +702,10 @@ 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; @@ -496,68 +732,62 @@ Context::now_mom () const } int -Context::print_smob (SCM s, SCM port, scm_print_state *) +Context::print_smob (SCM port, scm_print_state *) const { - Context *sc = (Context *) SCM_CELL_WORD_1 (s); - scm_puts ("#<", port); - scm_puts (sc->class_name (), port); - if (Context_def *d = unsmob_context_def (sc->definition_)) + scm_puts (class_name (), port); + if (Context_def *d = unsmob (definition_)) { scm_puts (" ", port); scm_display (d->get_context_name (), port); } - if (!sc->id_string_.empty ()) + if (!id_string_.empty ()) { scm_puts ("=", port); - scm_puts (sc->id_string_.c_str (), port); + scm_puts (id_string_.c_str (), port); } scm_puts (" ", port); - scm_display (sc->context_list_, port); + scm_display (context_list_, port); scm_puts (" >", port); return 1; } +void +Context::derived_mark () const +{ +} + SCM -Context::mark_smob (SCM sm) +Context::mark_smob () const { - Context *me = (Context *) SCM_CELL_WORD_1 (sm); - if (me->key_) - scm_gc_mark (me->key_->self_scm ()); + scm_gc_mark (context_list_); + scm_gc_mark (aliases_); + scm_gc_mark (definition_); + scm_gc_mark (definition_mods_); + scm_gc_mark (properties_scm_); + scm_gc_mark (accepts_list_); + scm_gc_mark (default_child_); - 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->accepts_list_); - if (me->implementation_) - scm_gc_mark (me->implementation_->self_scm ()); + if (implementation_) + scm_gc_mark (implementation_->self_scm ()); - return me->properties_scm_; -} + if (event_source_) + scm_gc_mark (event_source_->self_scm ()); -IMPLEMENT_SMOBS (Context); -IMPLEMENT_DEFAULT_EQUAL_P (Context); -IMPLEMENT_TYPE_P (Context, "ly:context?"); + if (events_below_) + scm_gc_mark (events_below_->self_scm ()); -bool -Context::try_music (Music *m) -{ - Translator_group *t = implementation (); - if (!t) - return false; - - bool b = t->try_music (m); - if (!b && daddy_context_) - b = daddy_context_->try_music (m); + derived_mark (); - return b; + return properties_scm_; } +const char * const Context::type_p_name_ = "ly:context?"; + Global_context * Context::get_global_context () const { @@ -577,18 +807,6 @@ Context::get_parent_context () const return daddy_context_; } -void -Context::clear_key_disambiguations () -{ - if (!use_object_keys) - return; - - grob_counts_.clear (); - context_counts_.clear (); - for (SCM s = context_list_; scm_is_pair (s); s = scm_cdr (s)) - unsmob_context (scm_car (s))->clear_key_disambiguations (); -} - /* Ugh. Where to put this? */ @@ -597,8 +815,8 @@ measure_length (Context const *context) { SCM l = context->get_property ("measureLength"); Rational length (1); - if (unsmob_moment (l)) - length = unsmob_moment (l)->main_part_; + if (unsmob (l)) + length = unsmob (l)->main_part_; return length; } @@ -608,29 +826,95 @@ measure_position (Context const *context) SCM sm = context->get_property ("measurePosition"); Moment m = 0; - if (unsmob_moment (sm)) + if (unsmob (sm)) { - m = *unsmob_moment (sm); + m = *unsmob (sm); if (m.main_part_ < Rational (0)) - { - Rational length (measure_length (context)); - while (m.main_part_ < Rational (0)) - m.main_part_ += length; - } + { + 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->internal_set_property (sym, ly_deep_copy (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)); + Context *trg = unsmob (scm_car (p)); set_context_property_on_children (trg, sym, ly_deep_copy (val)); } } + +bool +melisma_busy (Context *tr) +{ + // When there are subcontexts, they are responsible for maintaining + // melismata. + SCM ch = tr->children_contexts (); + if (scm_is_pair (ch)) + { + // all contexts need to have a busy melisma for this to evaluate + // to true. + + do { + if (!melisma_busy (unsmob (scm_car (ch)))) + return false; + ch = scm_cdr (ch); + } while (scm_is_pair (ch)); + return true; + } + + for (SCM melisma_properties = tr->get_property ("melismaBusyProperties"); + scm_is_pair (melisma_properties); + melisma_properties = scm_cdr (melisma_properties)) + if (to_boolean (tr->get_property (scm_car (melisma_properties)))) + return true; + + return false; +} + +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 ()))); +}