From 666cb250dfbc41e3029c31c6285a73f199651ef4 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 21 Jul 2020 00:39:03 +0200
Subject: [PATCH] Allow const operatons on time-selection

---
 gtk2_ardour/time_selection.cc | 10 +++++-----
 gtk2_ardour/time_selection.h  |  6 +++---
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/gtk2_ardour/time_selection.cc b/gtk2_ardour/time_selection.cc
index 43e8d95d39..4d59f9dcfb 100644
--- a/gtk2_ardour/time_selection.cc
+++ b/gtk2_ardour/time_selection.cc
@@ -70,7 +70,7 @@ TimeSelection::consolidate ()
 }
 
 samplepos_t
-TimeSelection::start ()
+TimeSelection::start () const
 {
 	if (empty()) {
 		return 0;
@@ -78,7 +78,7 @@ TimeSelection::start ()
 
 	samplepos_t first = max_samplepos;
 
-	for (std::list<AudioRange>::iterator i = begin(); i != end(); ++i) {
+	for (std::list<AudioRange>::const_iterator i = begin(); i != end(); ++i) {
 		if ((*i).start < first) {
 			first = (*i).start;
 		}
@@ -87,13 +87,13 @@ TimeSelection::start ()
 }
 
 samplepos_t
-TimeSelection::end_sample ()
+TimeSelection::end_sample () const
 {
 	samplepos_t last = 0;
 
 	/* XXX make this work like RegionSelection: no linear search needed */
 
-	for (std::list<AudioRange>::iterator i = begin(); i != end(); ++i) {
+	for (std::list<AudioRange>::const_iterator i = begin(); i != end(); ++i) {
 		if ((*i).end > last) {
 			last = (*i).end;
 		}
@@ -102,7 +102,7 @@ TimeSelection::end_sample ()
 }
 
 samplecnt_t
-TimeSelection::length()
+TimeSelection::length() const
 {
 	if (empty()) {
 		return 0;
diff --git a/gtk2_ardour/time_selection.h b/gtk2_ardour/time_selection.h
index f3ca6e076e..53a0f28662 100644
--- a/gtk2_ardour/time_selection.h
+++ b/gtk2_ardour/time_selection.h
@@ -33,9 +33,9 @@ class TimeSelection : public std::list<ARDOUR::AudioRange>
 public:
 	ARDOUR::AudioRange& operator[](uint32_t);
 
-	ARDOUR::samplepos_t start();
-	ARDOUR::samplepos_t end_sample();
-	ARDOUR::samplepos_t length();
+	ARDOUR::samplepos_t start() const;
+	ARDOUR::samplepos_t end_sample() const;
+	ARDOUR::samplepos_t length() const;
 
 	bool consolidate ();
 };