From c3d14b1169e290b1551d4806597b90c4e0d4a00a Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 21 Nov 2023 17:07:28 -0700
Subject: [PATCH] basic note-tupling functionality implemented

---
 gtk2_ardour/ardour.keys.in      |  4 ++
 gtk2_ardour/midi_region_view.cc | 82 +++++++++++++++++++++++++++++++++
 gtk2_ardour/midi_region_view.h  |  3 ++
 3 files changed, 89 insertions(+)

diff --git a/gtk2_ardour/ardour.keys.in b/gtk2_ardour/ardour.keys.in
index 611d008bcd..e6591efa07 100644
--- a/gtk2_ardour/ardour.keys.in
+++ b/gtk2_ardour/ardour.keys.in
@@ -470,6 +470,10 @@ This mode provides many different operations on both regions and control points,
 @notes|Notes/nudge-earlier-fine|                   <@SECONDARY@>Left|Nudge Notes Earlier (fine)
 @notes|Notes/edit-channels|                                        c|Edit Note Channels
 @notes|Notes/edit-velocities|                                      v|Edit Note Velocities
+@notes|Notes/split-notes-grid|                          <@PRIMARY@>e|Split Notes By Grid
+@notes|Notes/join-notes|                                <@PRIMARY@>j|Join Notes
+@notes|Notes/split-notes-more|                         <@PRIMARY@>Up|Split Notes More Finely
+@notes|Notes/split-notes-less|                       <@PRIMARY@>Down|Split Notes Less Finely
 
 @notes|Notes/transpose-up-octave|                          <@SECONDARY@>Up|Transpose up (1 octave)
 @notes|Notes/transpose-down-octave|                      <@SECONDARY@>Down|Transpose down (1 octave)
diff --git a/gtk2_ardour/midi_region_view.cc b/gtk2_ardour/midi_region_view.cc
index 6297a77f69..a8f262f30a 100644
--- a/gtk2_ardour/midi_region_view.cc
+++ b/gtk2_ardour/midi_region_view.cc
@@ -4787,19 +4787,101 @@ MidiRegionView::end_note_splitting ()
 void
 MidiRegionView::split_notes_grid ()
 {
+	if (_selection.empty()) {
+		return;
+	}
+
+	/* XXX need to adjust pos to be global */
+	bool success;
+	std::shared_ptr<NoteType> base ((*_selection.begin())->note());
+
+	split_base_note.set_channel (base->channel());
+	split_base_note.set_length (base->length());
+	split_base_note.set_time (base->time());
+	split_base_note.set_note (base->note());
+	split_base_note.set_velocity (base->velocity());
+	split_base_note.set_off_velocity (base->off_velocity());
+
+	Temporal::Beats grid = trackview.editor().get_grid_type_as_beats (success, timepos_t (split_base_note.time()));
+
+	if (!success) {
+		/* No grid => use quarters */
+		grid = Beats (1, 0);
+	}
+
+	split_tuple = split_base_note.length().to_ticks() / grid.to_ticks();
+
+	start_note_diff_command (_("split notes"));
+	for (auto & s : _selection) {
+		note_diff_remove_note (s);
+	}
+	add_split_notes ();
+	apply_note_diff (false);
 }
 
 void
 MidiRegionView::split_notes_more ()
 {
+	if (_selection.empty()) {
+		return;
+	}
+
+	split_tuple++;
+
+	char buf[64];
+	snprintf (buf, sizeof (buf), "Split %s into %d", split_base_note.length().str().c_str(), split_tuple);
+	show_verbose_cursor (buf, 0, 0);
+
+	start_note_diff_command (_("split notes more"));
+	for (auto & s : _selection) {
+		note_diff_remove_note (s);
+	}
+	add_split_notes ();
+	apply_note_diff (false);
 }
 
 void
 MidiRegionView::split_notes_less ()
 {
+	if (_selection.empty()) {
+		return;
+	}
+
+	if (split_tuple <= 2) {
+		return;
+	}
+
+	split_tuple--;
+
+	char buf[64];
+	snprintf (buf, sizeof (buf), "Split %s into %d", split_base_note.length().str().c_str(), split_tuple);
+	show_verbose_cursor (buf, 0, 0);
+
+	start_note_diff_command (_("split notes less"));
+	for (auto & s : _selection) {
+		note_diff_remove_note (s);
+	}
+	add_split_notes ();
+	apply_note_diff (false);
 }
 
 void
 MidiRegionView::join_notes ()
 {
 }
+
+void
+MidiRegionView::add_split_notes ()
+{
+	Beats b (split_base_note.length());
+
+	b = b / split_tuple;
+
+	Beats pos (split_base_note.time());
+
+	for (uint32_t n = 0; n < split_tuple; ++n) {
+		std::shared_ptr<NoteType> new_note (new NoteType (split_base_note.channel(), pos, b, split_base_note.note(),  split_base_note.velocity()));
+		note_diff_add_note (new_note, true, true);
+		pos += b;
+	}
+}
diff --git a/gtk2_ardour/midi_region_view.h b/gtk2_ardour/midi_region_view.h
index cad8690bab..1d56c18cba 100644
--- a/gtk2_ardour/midi_region_view.h
+++ b/gtk2_ardour/midi_region_view.h
@@ -593,6 +593,7 @@ public:
 
 	uint32_t split_tuple;
 	bool     note_splitting;
+	NoteType split_base_note;
 
 	void start_note_splitting ();
 	void end_note_splitting ();
@@ -601,6 +602,8 @@ public:
 	void split_notes_more ();
 	void split_notes_less ();
 	void join_notes ();
+
+	void add_split_notes ();
 };