X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Ftranslator.cc;h=ec2b0f64a485ee0a5e4af91218800d9e9fb74091;hb=18037c60a42e96cf61b13006bb391e3699bdc45e;hp=e67ffcda221bceef24705d1e2fad3851adb85f55;hpb=a7f82e4dc22fc6219a9fe0f6874f8c91e3f31f24;p=lilypond.git diff --git a/lily/translator.cc b/lily/translator.cc index e67ffcda22..ec2b0f64a4 100644 --- a/lily/translator.cc +++ b/lily/translator.cc @@ -3,15 +3,17 @@ source file of the GNU LilyPond music typesetter - (c) 1997--2005 Han-Wen Nienhuys + (c) 1997--2006 Han-Wen Nienhuys */ #include "translator.hh" -#include "warn.hh" -#include "translator-group.hh" #include "context-def.hh" +#include "dispatcher.hh" #include "global-context.hh" +#include "international.hh" +#include "translator-group.hh" +#include "warn.hh" #include "translator.icc" #include "ly-smobs.icc" @@ -29,7 +31,6 @@ Translator::init () smobify_self (); } - void Translator::process_music () { @@ -75,6 +76,12 @@ Translator::get_daddy_translator () const return daddy_context_->implementation (); } +void +Translator::protect_event (SCM ev) +{ + get_daddy_translator ()->protect_event (ev); +} + SCM Translator::internal_get_property (SCM sym) const { @@ -109,6 +116,82 @@ Translator::finalize () { } +void +Translator::connect_to_context (Context *c) +{ + for (translator_listener_record *r = get_listener_list (); r; r=r->next_) + c->events_below ()->add_listener (r->get_listener_ (this), r->event_class_); +} + +void +Translator::disconnect_from_context (Context *c) +{ + for (translator_listener_record *r = get_listener_list (); r; r=r->next_) + c->events_below ()->remove_listener (r->get_listener_ (this), r->event_class_); +} + +static SCM listened_event_class_table; +void +ensure_listened_hash () +{ + if (!listened_event_class_table) + listened_event_class_table = scm_permanent_object (scm_c_make_hash_table (61)); +} + + +LY_DEFINE (ly_get_listened_event_classes, "ly:get-listened-event-classes", + 0, 0, 0, (), + "Returns a list of all event classes that some translator listens to.") +{ + ensure_listened_hash (); + return ly_hash_table_keys (listened_event_class_table); +} + +LY_DEFINE (ly_is_listened_event_class, "ly:is-listened-event-class", + 1, 0, 0, (SCM sym), + "Is @var{sym} a listened event class?") +{ + ensure_listened_hash (); + return scm_hashq_ref (listened_event_class_table, sym, SCM_BOOL_F); +} + +void +add_listened_event_class (SCM sym) +{ + ensure_listened_hash (); + + scm_hashq_set_x (listened_event_class_table, sym, SCM_BOOL_T); +} + + +/* + internally called once, statically, for each translator + listener. Connects the name of an event class with a procedure that + fetches the corresponding listener. + + The method should only be called from the macro + IMPLEMENT_TRANSLATOR_LISTENER. + */ +void +Translator::add_translator_listener (translator_listener_record **listener_list, + translator_listener_record *r, + Listener (*get_listener) (void *), + const char *ev_class) +{ + /* ev_class is the C++ identifier name. Convert to scm symbol */ + string name = string (ev_class); + name = replace_all (name, '_', '-'); + name += "-event"; + + SCM class_sym = scm_str2symbol (name.c_str ()); + + add_listened_event_class (class_sym); + r->event_class_ = class_sym; + r->get_listener_ = get_listener; + r->next_ = *listener_list; + *listener_list = r; +} + /* SMOBS */ @@ -120,30 +203,18 @@ Translator::mark_smob (SCM sm) return SCM_EOL; } -SCM -Translator::translator_description () const -{ - return SCM_EOL; -} - Global_context * Translator::get_global_context () const { return daddy_context_->get_global_context (); } -Score_context * +Context * Translator::get_score_context () const { return daddy_context_->get_score_context (); } -SCM -Translator::static_translator_description ()const -{ - return SCM_EOL; -} - IMPLEMENT_SMOBS (Translator); IMPLEMENT_DEFAULT_EQUAL_P (Translator); IMPLEMENT_TYPE_P (Translator, "ly:translator?"); @@ -159,20 +230,91 @@ Translator::derived_mark () const { } -void -Translator::fetch_precomputable_methods (Translator_void_method_ptr ptrs[]) -{ - for (int i = 0; i < TRANSLATOR_METHOD_PRECOMPUTE_COUNT; i++) - ptrs[i] = 0; -} - int Translator::print_smob (SCM s, SCM port, scm_print_state *) { Translator *me = (Translator *) SCM_CELL_WORD_1 (s); scm_puts ("#class_name (), port); scm_puts (" >", port); return 1; } +void +add_acknowledger (Engraver_void_function_engraver_grob_info ptr, + char const *func_name, + vector *ack_array) +{ + Acknowledge_information inf; + inf.function_ = ptr; + + string interface_name (func_name); + + interface_name = replace_all (interface_name, '_', '-'); + interface_name += "-interface"; + + /* + this is only called during program init, so safe to use scm_gc_protect_object() + */ + inf.symbol_ = scm_gc_protect_object (ly_symbol2scm (interface_name.c_str ())); + ack_array->push_back (inf); +} + +Engraver_void_function_engraver_grob_info +generic_get_acknowledger (SCM sym, vector const *ack_array) +{ + for (vsize i = 0; i < ack_array->size (); i++) + { + if (ack_array->at (i).symbol_ == sym) + return ack_array->at (i).function_; + } + return 0; +} + +Moment +get_event_length (Stream_event *e) +{ + Moment *m = unsmob_moment (e->get_property ("length")); + if (m) + return *m; + else + return Moment (0); +} + +/* + Helper, used through ASSIGN_EVENT_ONCE to throw warnings for + simultaneous events. The helper is only useful in listen_* methods + of translators. +*/ +bool +internal_event_assignment (Stream_event **old_ev, Stream_event *new_ev, const char *function) +{ + if (*old_ev) + { + /* extract event class from function name */ + const char *prefix = "listen_"; + assert (!strncmp (function, "listen_", strlen (prefix))); + function += strlen (prefix); + char ev_class[strlen (function) + 1]; + strcpy (ev_class, function); + for (char *c = ev_class; *c; c++) + if (*c == '_') + *c = '-'; + + new_ev->origin ()->warning (_f ("Two simultaneous %s events, junking this one", ev_class)); + (*old_ev)->origin ()->warning (_f ("Previous %s event here", ev_class)); + return false; + } + else + { + *old_ev = new_ev; + return true; + } +} + +ADD_TRANSLATOR (Translator, + "Base class. Unused", + "", + "", + "", + "");