diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
commit | 449aab3c465bbbf66d221fac3d7ea559f1720357 (patch) | |
tree | 6843cc40c88250a132acac701271f1504cd2df04 /libs/pbd/stateful.cc | |
parent | 9c0d7d72d70082a54f823cd44c0ccda5da64bb6f (diff) |
rollback to 3428, before the mysterious removal of libs/* at 3431/3432
git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs/pbd/stateful.cc')
-rw-r--r-- | libs/pbd/stateful.cc | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/libs/pbd/stateful.cc b/libs/pbd/stateful.cc new file mode 100644 index 0000000000..da014d738f --- /dev/null +++ b/libs/pbd/stateful.cc @@ -0,0 +1,148 @@ +/* + Copyright (C) 2000-2001 Paul Davis + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id: stateful.cc 629 2006-06-21 23:01:03Z paul $ +*/ + +#include <unistd.h> + +#include <pbd/stateful.h> +#include <pbd/filesystem.h> +#include <pbd/xml++.h> +#include <pbd/error.h> + +#include "i18n.h" + +namespace PBD { + +Stateful::Stateful () +{ + _extra_xml = 0; + _instant_xml = 0; +} + +Stateful::~Stateful () +{ + // Do not delete _extra_xml. The use of add_child_nocopy() + // means it needs to live on indefinately. + + if (_instant_xml) { + delete _instant_xml; + } +} + +void +Stateful::add_extra_xml (XMLNode& node) +{ + if (_extra_xml == 0) { + _extra_xml = new XMLNode ("extra"); + } + + _extra_xml->remove_nodes (node.name()); + _extra_xml->add_child_nocopy (node); +} + +XMLNode * +Stateful::extra_xml (const string& str) +{ + if (_extra_xml == 0) { + return 0; + } + + const XMLNodeList& nlist = _extra_xml->children(); + XMLNodeConstIterator i; + + for (i = nlist.begin(); i != nlist.end(); ++i) { + if ((*i)->name() == str) { + return (*i); + } + } + + return 0; +} + +void +Stateful::add_instant_xml (XMLNode& node, const sys::path& directory_path) +{ + sys::create_directories (directory_path); // may throw + + if (_instant_xml == 0) { + _instant_xml = new XMLNode ("instant"); + } + + _instant_xml->remove_nodes_and_delete (node.name()); + _instant_xml->add_child_copy (node); + + sys::path instant_xml_path(directory_path); + + instant_xml_path /= "instant.xml"; + + XMLTree tree; + tree.set_filename(instant_xml_path.to_string()); + + /* Important: the destructor for an XMLTree deletes + all of its nodes, starting at _root. We therefore + cannot simply hand it our persistent _instant_xml + node as its _root, because we will lose it whenever + the Tree goes out of scope. + + So instead, copy the _instant_xml node (which does + a deep copy), and hand that to the tree. + */ + + XMLNode* copy = new XMLNode (*_instant_xml); + tree.set_root (copy); + + if (!tree.write()) { + error << string_compose(_("Error: could not write %1"), instant_xml_path.to_string()) << endmsg; + } +} + +XMLNode * +Stateful::instant_xml (const string& str, const sys::path& directory_path) +{ + if (_instant_xml == 0) { + + sys::path instant_xml_path(directory_path); + instant_xml_path /= "instant.xml"; + + if (exists(instant_xml_path)) { + XMLTree tree; + if (tree.read(instant_xml_path.to_string())) { + _instant_xml = new XMLNode(*(tree.root())); + } else { + warning << string_compose(_("Could not understand XML file %1"), instant_xml_path.to_string()) << endmsg; + return 0; + } + } else { + return 0; + } + } + + const XMLNodeList& nlist = _instant_xml->children(); + XMLNodeConstIterator i; + + for (i = nlist.begin(); i != nlist.end(); ++i) { + if ((*i)->name() == str) { + return (*i); + } + } + + return 0; +} + +} // namespace PBD |