From c2a012545bb3b4f5e5c3c63fc40ffd7230ab56d9 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 24 May 2021 12:26:21 -0600
Subject: [PATCH] API infrastructure for dragging region/cue markers

---
 libs/ardour/ardour/region.h |  1 +
 libs/ardour/ardour/source.h |  1 +
 libs/ardour/region.cc       |  8 ++++++++
 libs/ardour/source.cc       | 12 ++++++++++++
 4 files changed, 22 insertions(+)

diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index b107ea8be4..69c58babe4 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -375,6 +375,7 @@ public:
 	}
 
 	void get_cue_markers (CueMarkers&, bool abs = false) const;
+	void move_cue_marker (CueMarker const &, samplepos_t region_relative_position);
 
 protected:
 	virtual XMLNode& state ();
diff --git a/libs/ardour/ardour/source.h b/libs/ardour/ardour/source.h
index 1faa4dd4bc..72303feb2d 100644
--- a/libs/ardour/ardour/source.h
+++ b/libs/ardour/ardour/source.h
@@ -114,6 +114,7 @@ public:
 
 	CueMarkers const & cue_markers() const { return _cue_markers; }
 	void add_cue_marker (CueMarker const &);
+	void move_cue_marker (CueMarker const &, samplepos_t source_relative_position);
 	bool  remove_cue_marker (CueMarker const &);
 	bool clear_cue_markers ();
 	PBD::Signal0<void> CueMarkersChanged;
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index a38f30a24e..573bfad12c 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -1937,6 +1937,14 @@ Region::get_cue_markers (CueMarkers& cues, bool abs) const
 	}
 }
 
+void
+Region::move_cue_marker (CueMarker const & cm, samplepos_t region_relative_position)
+{
+	for (SourceList::const_iterator s = _sources.begin (); s != _sources.end(); ++s) {
+		(*s)->move_cue_marker (cm, start() + region_relative_position);
+	}
+}
+
 void
 Region::drop_sources ()
 {
diff --git a/libs/ardour/source.cc b/libs/ardour/source.cc
index c03495c118..2ed5ebf073 100644
--- a/libs/ardour/source.cc
+++ b/libs/ardour/source.cc
@@ -420,6 +420,18 @@ Source::add_cue_marker (CueMarker const & cm)
 	CueMarkersChanged(); /* EMIT SIGNAL */
 }
 
+void
+Source::move_cue_marker (CueMarker const & cm, samplepos_t source_relative_position)
+{
+	if (source_relative_position > length (0)) {
+		return;
+	}
+
+	if (remove_cue_marker (cm)) {
+		add_cue_marker (CueMarker (cm.text(), source_relative_position));
+	}
+}
+
 bool
 Source::remove_cue_marker (CueMarker const & cm)
 {