X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fmetronome-engraver.cc;h=6cd2bfde25e73ff844e875ba6fc6b12519a2bc08;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=6191407a5a11b03899e9f7fd695f8395dd610e71;hpb=0387f04497978e37b335a8b99eec905499d6ad0f;p=lilypond.git diff --git a/lily/metronome-engraver.cc b/lily/metronome-engraver.cc index 6191407a5a..6cd2bfde25 100644 --- a/lily/metronome-engraver.cc +++ b/lily/metronome-engraver.cc @@ -1,9 +1,20 @@ /* - metronome-engraver.cc -- implement Metronome_mark_engraver + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 1998--2015 Jan Nieuwenhuizen - (c) 1998--2008 Jan Nieuwenhuizen + 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 @@ -15,6 +26,7 @@ using namespace std; #include "duration.hh" #include "grob-array.hh" #include "item.hh" +#include "music.hh" #include "stream-event.hh" #include "text-interface.hh" @@ -22,36 +34,90 @@ using namespace std; class Metronome_mark_engraver : public Engraver { + Item *text_; + Grob *support_; + Grob *bar_; + Stream_event *tempo_ev_; + public: TRANSLATOR_DECLARATIONS (Metronome_mark_engraver); -protected: - Item *text_; - Grob *bar_line_; - SCM last_duration_; - SCM last_count_; - SCM last_text_; - protected: - virtual void derived_mark () const; void stop_translation_timestep (); void process_music (); + + void acknowledge_break_aligned (Grob_info); + void acknowledge_break_alignment (Grob_info); + void acknowledge_grob (Grob_info); + + void listen_tempo_change (Stream_event *); }; -Metronome_mark_engraver::Metronome_mark_engraver () +Metronome_mark_engraver::Metronome_mark_engraver (Context *c) + : Engraver (c) { text_ = 0; - last_duration_ = SCM_EOL; - last_count_ = SCM_EOL; - last_text_ = SCM_EOL; + support_ = 0; + bar_ = 0; + tempo_ev_ = 0; +} + +void +Metronome_mark_engraver::listen_tempo_change (Stream_event *ev) +{ + ASSIGN_EVENT_ONCE (tempo_ev_, ev); +} + +static bool +safe_is_member (SCM scm, SCM lst) +{ + return ly_is_list (lst) && scm_is_true (scm_member (scm, lst)); +} + +void +Metronome_mark_engraver::acknowledge_break_aligned (Grob_info info) +{ + Grob *g = info.grob (); + + if (text_ + && scm_is_eq (g->get_property ("break-align-symbol"), + ly_symbol2scm ("staff-bar"))) + bar_ = g; + else if (text_ + && !support_ + && safe_is_member (g->get_property ("break-align-symbol"), + text_->get_property ("break-align-symbols")) + && Item::break_visible (g)) + { + support_ = g; + text_->set_parent (g, X_AXIS); + } + if (bar_ || support_) + text_->set_property ("non-musical", SCM_BOOL_T); +} + +void +Metronome_mark_engraver::acknowledge_break_alignment (Grob_info info) +{ + Grob *g = info.grob (); + + if (text_ + && support_ + && dynamic_cast (g)) + text_->set_parent (g, X_AXIS); } void -Metronome_mark_engraver::derived_mark () const +Metronome_mark_engraver::acknowledge_grob (Grob_info info) { - scm_gc_mark (last_count_); - scm_gc_mark (last_duration_); - scm_gc_mark (last_text_); + Grob *g = info.grob (); + + if (text_) + for (SCM s = text_->get_property ("non-break-align-symbols"); + scm_is_pair (s); + s = scm_cdr (s)) + if (g->internal_has_interface (scm_car (s))) + text_->set_parent (g, X_AXIS); } void @@ -59,63 +125,77 @@ Metronome_mark_engraver::stop_translation_timestep () { if (text_) { - Grob *mc = unsmob_grob (get_property ("currentMusicalColumn")); - text_->set_parent (mc, X_AXIS); + if (text_->get_parent (X_AXIS) + && text_->get_parent (X_AXIS)->internal_has_interface (ly_symbol2scm ("multi-measure-rest-interface")) + && bar_) + text_->set_parent (bar_, X_AXIS); + else if (!support_) + { + /* + Gardner Read "Music Notation", p.278 + + Align the metronome mark over the time signature (or the + first notational element of the measure if no time + signature is present in that measure). + */ + if (Grob *mc = unsmob (get_property ("currentMusicalColumn"))) + text_->set_parent (mc, X_AXIS); + else if (Grob *cc = unsmob (get_property ("currentCommandColumn"))) + text_->set_parent (cc, X_AXIS); + } text_->set_object ("side-support-elements", - grob_list_to_grob_array (get_property ("stavesFound"))); + grob_list_to_grob_array (get_property ("stavesFound"))); text_ = 0; + support_ = 0; + bar_ = 0; + tempo_ev_ = 0; } } void Metronome_mark_engraver::process_music () { - SCM count = get_property ("tempoUnitCount"); - SCM duration = get_property ("tempoUnitDuration"); - SCM text = get_property ("tempoText"); - - if ( ( (unsmob_duration (duration) && scm_is_number (count)) - || Text_interface::is_markup (text) ) - && !(ly_is_equal (count, last_count_) - && ly_is_equal (duration, last_duration_) - && ly_is_equal (text, last_text_))) + if (tempo_ev_) { - text_ = make_item ("MetronomeMark", SCM_EOL); + text_ = make_item ("MetronomeMark", tempo_ev_->self_scm ()); SCM proc = get_property ("metronomeMarkFormatter"); - SCM result = scm_call_4 (proc, - text, - duration, - count, - context ()->self_scm ()); + SCM result = scm_call_2 (proc, + tempo_ev_->self_scm (), + context ()->self_scm ()); text_->set_property ("text", result); } +} + - last_duration_ = duration; - last_count_ = count; - last_text_ = text; +void +Metronome_mark_engraver::boot () +{ + ADD_LISTENER (Metronome_mark_engraver, tempo_change); + ADD_ACKNOWLEDGER (Metronome_mark_engraver, break_aligned); + ADD_ACKNOWLEDGER (Metronome_mark_engraver, break_alignment); + ADD_ACKNOWLEDGER (Metronome_mark_engraver, grob); } ADD_TRANSLATOR (Metronome_mark_engraver, - /* doc */ - "Engrave metronome marking. This delegates the formatting" - " work to the function in the @code{metronomeMarkFormatter}" - " property. The mark is put over all staves. The staves are" - " taken from the @code{stavesFound} property, which is" - " maintained by @ref{Staff_collecting_engraver}.", - - /* create */ - "MetronomeMark ", - - /* read */ - "stavesFound " - "metronomeMarkFormatter " - "tempoUnitDuration " - "tempoUnitCount " - "tempoText " - "tempoHideNote ", - - /* write */ - "" - ); + /* doc */ + "Engrave metronome marking. This delegates the formatting" + " work to the function in the @code{metronomeMarkFormatter}" + " property. The mark is put over all staves. The staves are" + " taken from the @code{stavesFound} property, which is" + " maintained by @ref{Staff_collecting_engraver}.", + + /* create */ + "MetronomeMark ", + + /* read */ + "currentCommandColumn " + "currentMusicalColumn " + "metronomeMarkFormatter " + "stavesFound " + "tempoHideNote ", + + /* write */ + "" + );