Move Ardour::Progress to PBD::Progress

This will allow PBD::Filearchive to properly report progress.
It is also a generally useful API and deserves to be in libpbd.

Temporarily keep Ardour::Progress as alias

libs/ardour/ardour/progress.h

@@ -19,43 +19,14 @@
 #ifndef __ardour_progress_h__
 #define __ardour_progress_h__
 
-#include <list>
+#include "pbd/progress.h"
 
 #include "ardour/libardour_visibility.h"
 
 namespace ARDOUR {
 
-/** A class to handle reporting of progress of something */
-class LIBARDOUR_API Progress
+class LIBPBD_API Progress : public PBD::Progress
 {
-public:
-	Progress ();
-	virtual ~Progress () {}
-	void set_progress (float);
-
-	void ascend ();
-	void descend (float);
-
-	bool cancelled () const;
-
-protected:
-	void cancel ();
-
-private:
-	/** Report overall progress.
-	 *  @param p Current progress (from 0 to 1)
-	 */
-	virtual void set_overall_progress (float p) = 0;
-
-	struct Level {
-		Level (float a) : allocation (a), normalised (0) {}
-
-		float allocation;
-		float normalised;
-	};
-
-	std::list<Level> _stack;
-	bool _cancelled;
 };
 
 }

libs/ardour/wscript

@@ -192,7 +192,6 @@ libardour_sources = [
         'presentation_info.cc',
         'process_thread.cc',
         'processor.cc',
-        'progress.cc',
         'quantize.cc',
         'rc_configuration.cc',
         'readable.cc',

libs/pbd/pbd/progress.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _libpbd_progress_h_
+#define _libpbd_progress_h_
+
+#include <list>
+
+#include "pbd/libpbd_visibility.h"
+
+namespace PBD {
+
+/** A class to handle reporting of progress of something */
+class LIBPBD_API Progress
+{
+public:
+	Progress ();
+	virtual ~Progress () {}
+	void set_progress (float);
+
+	void ascend ();
+	void descend (float);
+
+	bool cancelled () const;
+
+protected:
+	void cancel ();
+
+private:
+	/** Report overall progress.
+	 *  @param p Current progress (from 0 to 1)
+	 */
+	virtual void set_overall_progress (float p) = 0;
+
+	struct Level {
+		Level (float a) : allocation (a), normalised (0) {}
+
+		float allocation;
+		float normalised;
+	};
+
+	std::list<Level> _stack;
+	bool _cancelled;
+};
+
+}
+
+#endif

libs/pbd/progress.cc

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
+ * Copyright (C) 2023 Robin Gareus <robin@gareus.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,11 +19,11 @@
 
 #include <cassert>
 #include <iostream>
-#include "ardour/progress.h"
+#include "pbd/progress.h"
 
 using namespace std;
 
-ARDOUR::Progress::Progress ()
+PBD::Progress::Progress ()
 	: _cancelled (false)
 {
 	descend (1);
@@ -37,13 +38,13 @@ ARDOUR::Progress::Progress ()
  *  @param p Percentage (from 0 to 1) of the current task to allocate to the subtask.
  */
 void
-ARDOUR::Progress::descend (float a)
+PBD::Progress::descend (float a)
 {
 	_stack.push_back (Level (a));
 }
 
 void
-ARDOUR::Progress::ascend ()
+PBD::Progress::ascend ()
 {
 	assert (!_stack.empty ());
 	float const a = _stack.back().allocation;
@@ -55,7 +56,7 @@ ARDOUR::Progress::ascend ()
  *  @param p Progress (from 0 to 1)
  */
 void
-ARDOUR::Progress::set_progress (float p)
+PBD::Progress::set_progress (float p)
 {
 	assert (!_stack.empty ());
 
@@ -72,13 +73,13 @@ ARDOUR::Progress::set_progress (float p)
 }
 
 void
-ARDOUR::Progress::cancel ()
+PBD::Progress::cancel ()
 {
 	_cancelled = true;
 }
 
 bool
-ARDOUR::Progress::cancelled () const
+PBD::Progress::cancelled () const
 {
 	return _cancelled;
 }

libs/pbd/wscript

@@ -66,6 +66,7 @@ libpbd_sources = [
     'pbd.cc',
     'pcg_rand.cc',
     'pool.cc',
+    'progress.cc',
     'property_list.cc',
     'pthread_utils.cc',
     'reallocpool.cc',