fix nasty logic error that leads to crashing bugs when trying to operate on regions that have been subject to undo/redo

git-svn-id: svn://localhost/ardour2/trunk@1670 d708f5d6-7413-0410-9779-e7cbd77b26cf

5 files changed, 37 insertions, 5 deletions

diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index 103e95929e..5f33719ae7 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -182,6 +182,7 @@ class Playlist : public PBD::StatefulDestructible, public boost::enable_shared_f
 	bool             save_on_thaw;
 	string           last_save_reason;
 	uint32_t         in_set_state;
+	bool             first_set_state;
 	bool            _hidden;
 	bool            _splicing;
 	bool            _nudging;
diff --git a/libs/ardour/audiofilesource.cc b/libs/ardour/audiofilesource.cc
index 9a3bf266ae..929cfc8083 100644
--- a/libs/ardour/audiofilesource.cc
+++ b/libs/ardour/audiofilesource.cc
@@ -29,11 +29,13 @@
 #include <pbd/pathscanner.h>
 #include <pbd/stl_delete.h>
 #include <pbd/strsplit.h>
+#include <pbd/shortpath.h>
 #include <pbd/enumwriter.h>
 
 #include <sndfile.h>
 
 #include <glibmm/miscutils.h>
+#include <glibmm/fileutils.h>
 
 #include <ardour/audiofilesource.h>
 #include <ardour/sndfile_helpers.h>
@@ -366,10 +368,33 @@ AudioFileSource::find (ustring& pathstr, bool must_exist, bool& isnew)
 
 	isnew = false;
 
-	/* clean up PATH:CHANNEL notation so that we are looking for the correct path */
+	/* i (paul) made a nasty design error by using ':' as a special character in
+	   Ardour 0.99 .. this hack tries to make things sort of work.
+	*/
 
 	if ((pos = pathstr.find_last_of (':')) != ustring::npos) {
-		pathstr = pathstr.substr (0, pos);
+		if (Glib::file_test (pathstr, Glib::FILE_TEST_EXISTS)) {
+			/* its a real file, no problem */
+			
+		} else {
+
+			if (must_exist) {
+
+				/* older session using file:channel syntax */
+				
+				warning << string_compose (_("This older session references an embedded\n\
+non-mono audio file:\n\n%1\n\n						\
+The session file may be edited or the file must be removed before it can be used."), 
+							   short_path (pathstr, 48))
+					<< endmsg;
+				return false;
+
+			} else {
+				
+				/* new derived file (e.g. for timefx) being created in a newer session */
+
+			}
+		}
 	}
 
 	if (pathstr[0] != '/') {
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index ae9e23fcc9..807bcd23ca 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -74,6 +74,7 @@ Playlist::Playlist (Session& sess, string nom, bool hide)
 	: _session (sess)
 {
 	init (hide);
+	first_set_state = false;
 	_name = nom;
 	
 }
@@ -108,6 +109,7 @@ Playlist::Playlist (boost::shared_ptr<const Playlist> other, string namestr, boo
 	_edit_mode = other->_edit_mode;
 
 	in_set_state = 0;
+	first_set_state = false;
 	in_flush = false;
 	in_partition = false;
 	subcnt = 0;
@@ -180,6 +182,7 @@ Playlist::Playlist (boost::shared_ptr<const Playlist> other, nframes_t start, nf
 	}
 	
 	in_set_state--;
+	first_set_state = false;
 
 	/* this constructor does NOT notify others (session) */
 }
@@ -220,6 +223,7 @@ Playlist::init (bool hide)
 	g_atomic_int_set (&ignore_state_changes, 0);
 	pending_modified = false;
 	pending_length = false;
+	first_set_state = true;
 	_refcnt = 0;
 	_hidden = hide;
 	_splicing = false;
@@ -508,10 +512,10 @@ Playlist::add_region_internal (boost::shared_ptr<Region> region, nframes_t posit
 		 old_length = _get_maximum_extent();
 	}
 
-	if (!in_set_state) {
+	if (!first_set_state) {
 		boost::shared_ptr<Playlist> foo (shared_from_this());
 		region->set_playlist (boost::weak_ptr<Playlist>(foo));
-	}
+	} 
 
 	region->set_position (position, this);
 
@@ -1418,7 +1422,7 @@ Playlist::set_state (const XMLNode& node)
 	}
 
 	in_set_state--;
-
+	first_set_state = false;
 	return 0;
 }
 
diff --git a/libs/ardour/session_time.cc b/libs/ardour/session_time.cc
index 2a921c3dc9..9ae3492ea7 100644
--- a/libs/ardour/session_time.cc
+++ b/libs/ardour/session_time.cc
@@ -25,6 +25,7 @@
 #include <ardour/timestamps.h>
 
 #include <pbd/error.h>
+#include <pbd/enumwriter.h>
 #include <pbd/stacktrace.h>
 
 #include <ardour/ardour.h>
diff --git a/libs/pbd/SConscript b/libs/pbd/SConscript
index 12664a1fca..3aaeb1bf1b 100644
--- a/libs/pbd/SConscript
+++ b/libs/pbd/SConscript
@@ -34,6 +34,7 @@ pathscanner.cc
 pool.cc
 pthread_utils.cc
 receiver.cc
+shortpath.cc
 stacktrace.cc
 stateful.cc
 strreplace.cc