From 0ea7e80aa6ea9599b34d95624dc4e72b134e095e Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 12 Jul 2024 18:25:04 +0200
Subject: [PATCH] Implement paste to region gain/fx automation

---
 gtk2_ardour/audio_region_view.cc | 35 ++++++++++++++++++++++++++++++++
 gtk2_ardour/audio_region_view.h  |  2 ++
 gtk2_ardour/editor_ops.cc        | 11 ++++++++--
 3 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/gtk2_ardour/audio_region_view.cc b/gtk2_ardour/audio_region_view.cc
index 9a9eaa4346..7c62f2990d 100644
--- a/gtk2_ardour/audio_region_view.cc
+++ b/gtk2_ardour/audio_region_view.cc
@@ -67,6 +67,7 @@
 #include "mergeable_line.h"
 #include "region_gain_line.h"
 #include "control_point.h"
+#include "paste_context.h"
 #include "ghostregion.h"
 #include "audio_time_axis.h"
 #include "rgb_macros.h"
@@ -1258,6 +1259,40 @@ AudioRegionView::get_region_fx_line (PBD::ID& id, uint32_t& param_id)
 	return _rdx_param != UINT32_MAX && _rfx_id != 0;
 }
 
+bool
+AudioRegionView::paste (Temporal::timepos_t const& pos, const Selection& selection, PasteContext& ctx)
+{
+	if (!_fx_line || selection.lines.size() != 1) {
+		return false;
+	}
+	std::shared_ptr<AutomationList> alist (_fx_line->the_list());
+
+	AutomationSelection::const_iterator p = selection.lines.begin ();
+
+	Temporal::timecnt_t len = (*p)->length();
+	Temporal::timepos_t tpos (pos);
+
+	unsigned paste_count = ctx.count;
+
+	switch (alist->time_domain()) {
+		case Temporal::BeatTime:
+			tpos += trackview.editor().get_paste_offset (pos, paste_count > 0 ? 1 : 0, len);
+			break;
+		case Temporal::AudioTime:
+			tpos += trackview.editor().get_paste_offset (pos, paste_count, len);
+			break;
+	}
+
+	XMLNode &before = alist->get_state();
+	Temporal::timepos_t model_pos (_region->position().distance (tpos));
+	alist->paste (**p, model_pos);
+	timepos_t rlen ((samplepos_t)_region->length().samples());
+	alist->truncate_end (rlen);
+	trackview.session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
+
+	return true;
+}
+
 void
 AudioRegionView::update_envelope_visibility ()
 {
diff --git a/gtk2_ardour/audio_region_view.h b/gtk2_ardour/audio_region_view.h
index 762dba9107..07d03eba8b 100644
--- a/gtk2_ardour/audio_region_view.h
+++ b/gtk2_ardour/audio_region_view.h
@@ -54,6 +54,7 @@ class GhostRegion;
 class AutomationTimeAxisView;
 class RegionFxLine;
 class RouteTimeAxisView;
+class PasteContext;
 
 class AudioRegionView : public RegionView, public LineMerger
 {
@@ -97,6 +98,7 @@ public:
 	bool set_region_fx_line (std::weak_ptr<PBD::Controllable>);
 	bool get_region_fx_line (PBD::ID&, uint32_t&);
 	void update_envelope_visibility ();
+	bool paste (Temporal::timepos_t const&, const Selection&, PasteContext&);
 
 	sigc::signal<void> region_line_changed;
 
diff --git a/gtk2_ardour/editor_ops.cc b/gtk2_ardour/editor_ops.cc
index b720cf3022..1025c6c6e0 100644
--- a/gtk2_ardour/editor_ops.cc
+++ b/gtk2_ardour/editor_ops.cc
@@ -5405,7 +5405,7 @@ Editor::paste_internal (timepos_t const & pos, float times)
 		 * the below "do the reasonable thing" logic. */
 		ts = selection->tracks.filter_to_unique_playlists ();
 		sort_track_selection (ts);
-	} else {
+	} else if (cut_buffer->lines.empty ()) {
 		/* Figure out which track to base the paste at. */
 		TimeAxisView* base_track = NULL;
 		if (_edit_point == Editing::EditAtMouse && entered_track) {
@@ -5459,10 +5459,17 @@ Editor::paste_internal (timepos_t const & pos, float times)
 		   R1.A1, R1.A2, R2, R2.A1, ... */
 	}
 
+
 	bool commit = false;
 	begin_reversible_command (Operations::paste);
 
-	if (ts.size() == 1 && cut_buffer->lines.size() == 1 &&
+	if (ts.size() == 0 && cut_buffer->lines.size() == 1 && entered_regionview) {
+		AudioRegionView* arv = dynamic_cast<AudioRegionView*>(entered_regionview);
+		if (arv) {
+			PasteContext ctx(paste_count, times, ItemCounts(), true);
+			commit |= arv->paste (position, *cut_buffer, ctx);
+		}
+	} else if (ts.size() == 1 && cut_buffer->lines.size() == 1 &&
 	    dynamic_cast<AutomationTimeAxisView*>(ts.front())) {
 	    /* Only one line copied, and one automation track selected.  Do a
 	       "greedy" paste from one automation type to another. */