using System.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Windows.Forms;
using System.Collections.Specialized;
using System.Xml;
using System.IO;
namespace chc.servicemanagertray
{
public sealed class PortableSettingsProvider : SettingsProvider, IApplicationSettingsProvider
{
private const string _rootNodeName = "settings";
private const string _localSettingsNodeName = "localSettings";
private const string _globalSettingsNodeName = "globalSettings";
private const string _className = "PortableSettingsProvider";
private XmlDocument _xmlDocument;
private string _filePath
{
get
{
return Path.Combine(Path.GetDirectoryName(Application.ExecutablePath),
string.Format("{0}.settings", ApplicationName));
}
}
private XmlNode _localSettingsNode
{
get
{
XmlNode settingsNode = GetSettingsNode(_localSettingsNodeName);
XmlNode machineNode = settingsNode.SelectSingleNode(Environment.MachineName.ToLowerInvariant());
if (machineNode == null)
{
machineNode = _rootDocument.CreateElement(Environment.MachineName.ToLowerInvariant());
settingsNode.AppendChild(machineNode);
}
return machineNode;
}
}
private XmlNode _globalSettingsNode
{
get { return GetSettingsNode(_globalSettingsNodeName); }
}
private XmlNode _rootNode
{
get { return _rootDocument.SelectSingleNode(_rootNodeName); }
}
private XmlDocument _rootDocument
{
get
{
if (_xmlDocument == null)
{
try
{
_xmlDocument = new XmlDocument();
_xmlDocument.Load(_filePath);
}
catch (Exception)
{
}
if (_xmlDocument.SelectSingleNode(_rootNodeName) != null)
return _xmlDocument;
_xmlDocument = GetBlankXmlDocument();
}
return _xmlDocument;
}
}
public override string ApplicationName
{
get { return Path.GetFileNameWithoutExtension(Application.ExecutablePath); }
set { }
}
public override string Name
{
get { return _className; }
}
public override void Initialize(string name, NameValueCollection config)
{
base.Initialize(Name, config);
}
public override void SetPropertyValues(SettingsContext context, SettingsPropertyValueCollection collection)
{
foreach (SettingsPropertyValue propertyValue in collection)
SetValue(propertyValue);
try
{
_rootDocument.Save(_filePath);
}
catch (Exception)
{
/*
* If this is a portable application and the device has been
* removed then this will fail, so don't do anything. It's
* probably better for the application to stop saving settings
* rather than just crashing outright. Probably.
*/
}
}
public override SettingsPropertyValueCollection GetPropertyValues(SettingsContext context, SettingsPropertyCollection collection)
{
SettingsPropertyValueCollection values = new SettingsPropertyValueCollection();
foreach (SettingsProperty property in collection)
{
values.Add(new SettingsPropertyValue(property)
{
SerializedValue = GetValue(property)
});
}
return values;
}
private void SetValue(SettingsPropertyValue propertyValue)
{
XmlNode targetNode = IsGlobal(propertyValue.Property)
? _globalSettingsNode
: _localSettingsNode;
XmlNode settingNode = targetNode.SelectSingleNode(string.Format("setting[@name='{0}']", propertyValue.Name));
if (settingNode != null)
settingNode.InnerText = propertyValue.SerializedValue.ToString();
else
{
settingNode = _rootDocument.CreateElement("setting");
XmlAttribute nameAttribute = _rootDocument.CreateAttribute("name");
nameAttribute.Value = propertyValue.Name;
settingNode.Attributes.Append(nameAttribute);
settingNode.InnerText = propertyValue.SerializedValue.ToString();
targetNode.AppendChild(settingNode);
}
}
private string GetValue(SettingsProperty property)
{
XmlNode targetNode = IsGlobal(property) ? _globalSettingsNode : _localSettingsNode;
XmlNode settingNode = targetNode.SelectSingleNode(string.Format("setting[@name='{0}']", property.Name));
if (settingNode == null)
return property.DefaultValue != null ? property.DefaultValue.ToString() : string.Empty;
return settingNode.InnerText;
}
private bool IsGlobal(SettingsProperty property)
{
foreach (DictionaryEntry attribute in property.Attributes)
{
if ((Attribute)attribute.Value is SettingsManageabilityAttribute)
return true;
}
return false;
}
private XmlNode GetSettingsNode(string name)
{
XmlNode settingsNode = _rootNode.SelectSingleNode(name);
if (settingsNode == null)
{
settingsNode = _rootDocument.CreateElement(name);
_rootNode.AppendChild(settingsNode);
}
return settingsNode;
}
public XmlDocument GetBlankXmlDocument()
{
XmlDocument blankXmlDocument = new XmlDocument();
blankXmlDocument.AppendChild(blankXmlDocument.CreateXmlDeclaration("1.0", "utf-8", string.Empty));
blankXmlDocument.AppendChild(blankXmlDocument.CreateElement(_rootNodeName));
return blankXmlDocument;
}
public void Reset(SettingsContext context)
{
_localSettingsNode.RemoveAll();
_globalSettingsNode.RemoveAll();
_xmlDocument.Save(_filePath);
}
public SettingsPropertyValue GetPreviousVersion(SettingsContext context, SettingsProperty property)
{
// do nothing
return new SettingsPropertyValue(property);
}
public void Upgrade(SettingsContext context, SettingsPropertyCollection properties)
{
}
}
}
