Paul Davis
f6fdd8dcbf
git-svn-id: svn://localhost/ardour2/branches/3.0@6372 d708f5d6-7413-0410-9779-e7cbd77b26cf
153 lines
3.5 KiB
C++
153 lines
3.5 KiB
C++
/*
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Copyright (C) 2000-2001 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: stateful.cc 629 2006-06-21 23:01:03Z paul $
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*/
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#include <unistd.h>
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#include "pbd/stateful.h"
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#include "pbd/destructible.h"
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#include "pbd/filesystem.h"
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#include "pbd/xml++.h"
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#include "pbd/error.h"
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#include "i18n.h"
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using namespace std;
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namespace PBD {
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int Stateful::current_state_version = 0;
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int Stateful::loading_state_version = 0;
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Stateful::Stateful ()
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{
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_extra_xml = 0;
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_instant_xml = 0;
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}
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Stateful::~Stateful ()
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{
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// Do not delete _extra_xml. The use of add_child_nocopy()
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// means it needs to live on indefinately.
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delete _instant_xml;
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}
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void
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Stateful::add_extra_xml (XMLNode& node)
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{
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if (_extra_xml == 0) {
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_extra_xml = new XMLNode ("Extra");
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}
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_extra_xml->remove_nodes (node.name());
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_extra_xml->add_child_nocopy (node);
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}
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XMLNode *
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Stateful::extra_xml (const string& str)
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{
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if (_extra_xml == 0) {
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return 0;
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}
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const XMLNodeList& nlist = _extra_xml->children();
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XMLNodeConstIterator i;
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for (i = nlist.begin(); i != nlist.end(); ++i) {
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if ((*i)->name() == str) {
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return (*i);
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}
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}
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return 0;
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}
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void
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Stateful::add_instant_xml (XMLNode& node, const sys::path& directory_path)
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{
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sys::create_directories (directory_path); // may throw
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if (_instant_xml == 0) {
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_instant_xml = new XMLNode ("instant");
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}
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_instant_xml->remove_nodes_and_delete (node.name());
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_instant_xml->add_child_copy (node);
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sys::path instant_xml_path(directory_path);
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instant_xml_path /= "instant.xml";
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XMLTree tree;
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tree.set_filename(instant_xml_path.to_string());
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/* Important: the destructor for an XMLTree deletes
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all of its nodes, starting at _root. We therefore
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cannot simply hand it our persistent _instant_xml
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node as its _root, because we will lose it whenever
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the Tree goes out of scope.
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So instead, copy the _instant_xml node (which does
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a deep copy), and hand that to the tree.
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*/
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XMLNode* copy = new XMLNode (*_instant_xml);
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tree.set_root (copy);
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if (!tree.write()) {
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error << string_compose(_("Error: could not write %1"), instant_xml_path.to_string()) << endmsg;
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}
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}
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XMLNode *
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Stateful::instant_xml (const string& str, const sys::path& directory_path)
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{
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if (_instant_xml == 0) {
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sys::path instant_xml_path(directory_path);
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instant_xml_path /= "instant.xml";
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if (exists(instant_xml_path)) {
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XMLTree tree;
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if (tree.read(instant_xml_path.to_string())) {
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_instant_xml = new XMLNode(*(tree.root()));
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} else {
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warning << string_compose(_("Could not understand XML file %1"), instant_xml_path.to_string()) << endmsg;
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return 0;
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}
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} else {
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return 0;
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}
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}
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const XMLNodeList& nlist = _instant_xml->children();
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XMLNodeConstIterator i;
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for (i = nlist.begin(); i != nlist.end(); ++i) {
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if ((*i)->name() == str) {
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return (*i);
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}
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}
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return 0;
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}
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} // namespace PBD
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