From e51541e5f02bf10f930afea171ca4966025e09a7 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 14 Feb 2011 15:58:17 +0000
Subject: [PATCH] prevent ardour from ever, EVER, EVAH removing an existing
 source file

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@8841 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/ardour/audiofilesource.h |  1 +
 libs/ardour/audiofilesource.cc       | 23 ++++++++++++++++++++++-
 libs/ardour/sndfilesource.cc         |  4 ++--
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/libs/ardour/ardour/audiofilesource.h b/libs/ardour/ardour/audiofilesource.h
index a3cebd1b35..b91ce79079 100644
--- a/libs/ardour/ardour/audiofilesource.h
+++ b/libs/ardour/ardour/audiofilesource.h
@@ -178,6 +178,7 @@ class AudioFileSource : public AudioSource {
 	Glib::ustring broken_peak_path (Glib::ustring audio_path);
 
 	void fix_writable_flags ();
+	void prevent_deletion ();
 };
 
 } // namespace ARDOUR
diff --git a/libs/ardour/audiofilesource.cc b/libs/ardour/audiofilesource.cc
index 9141456e22..ba5ab8a793 100644
--- a/libs/ardour/audiofilesource.cc
+++ b/libs/ardour/audiofilesource.cc
@@ -96,6 +96,7 @@ AudioFileSource::AudioFileSource (Session& s, ustring path, Flag flags)
 		throw failed_constructor ();
 	}
 
+        prevent_deletion ();
 	fix_writable_flags ();
 }
 
@@ -110,6 +111,7 @@ AudioFileSource::AudioFileSource (Session& s, ustring path, Flag flags, SampleFo
 		throw failed_constructor ();
 	}
 
+        prevent_deletion ();
 	fix_writable_flags ();
 }
 
@@ -129,6 +131,7 @@ AudioFileSource::AudioFileSource (Session& s, const XMLNode& node, bool must_exi
 		throw failed_constructor ();
 	}
 
+        prevent_deletion ();
 	fix_writable_flags ();
 }
 
@@ -140,9 +143,26 @@ AudioFileSource::~AudioFileSource ()
 	}
 }
 
+void
+AudioFileSource::prevent_deletion ()
+{
+        /* if this file already exists, it cannot be removed, ever
+         */
+
+        if (Glib::file_test (_path, Glib::FILE_TEST_EXISTS)) {
+                if (!(_flags & Destructive)) {
+                        mark_immutable ();
+                } else {
+                        _flags = Flag (_flags & ~(Removable|RemovableIfEmpty|RemoveAtDestroy));
+                }
+        }
+}
+
 void
 AudioFileSource::fix_writable_flags ()
 {
+        /* if the session is not writable, neither is this file 
+         */
 	if (!_session.writable()) {
 		_flags = Flag (_flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy|CanRename));
 	}
@@ -354,6 +374,7 @@ AudioFileSource::mark_for_remove ()
 	}
 
 	_flags = Flag (_flags | Removable | RemoveAtDestroy);
+
 }
 
 void
@@ -466,6 +487,7 @@ AudioFileSource::move_to_trash (const ustring& trash_dir_name)
 
 	_flags = Flag (_flags & ~(RemoveAtDestroy|Removable|RemovableIfEmpty));
 
+
 	return 0;
 }
 
@@ -775,7 +797,6 @@ AudioFileSource::mark_immutable ()
 	}
 }
 
-
 Sample*
 AudioFileSource::get_interleave_buffer (nframes_t size)
 {
diff --git a/libs/ardour/sndfilesource.cc b/libs/ardour/sndfilesource.cc
index 1759b4a6c1..2fa16d920d 100644
--- a/libs/ardour/sndfilesource.cc
+++ b/libs/ardour/sndfilesource.cc
@@ -633,7 +633,7 @@ bool
 SndFileSource::set_destructive (bool yn)
 {
 	if (yn) {
-		_flags = Flag (_flags | Destructive);
+		_flags = Flag (_flags | Writable | Destructive);
 		if (!xfade_buf) {
 			xfade_buf = new Sample[xfade_frames];
 		}
@@ -644,7 +644,7 @@ SndFileSource::set_destructive (bool yn)
 		timeline_position = 0;
 		/* leave xfade buf alone in case we need it again later */
 	}
-
+        
 	return true;
 }