public static SlideShow.Settings Load()
{
string settingsPath = Path.Combine(s_configPath, c_settingsFilename);
// If the configuration file doesn't exist, copy in default (if it exists)
if (!File.Exists(settingsPath))
{
string defaultSettingsPath = Path.Combine(
Path.GetDirectoryName(Environment.GetCommandLineArgs()[0]),
c_defaultSettingsFilename);
if (File.Exists(defaultSettingsPath))
{
File.Copy(defaultSettingsPath, settingsPath);
}
}
// Create the result
var list = new List <KeyValuePair <string, object> >();
var settings = new SlideShow.Settings();
try
{
XElement doc = null;
using (var stream = new FileStream(settingsPath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (var jsonReader = System.Runtime.Serialization.Json.JsonReaderWriterFactory.CreateJsonReader(stream, Encoding.UTF8, new System.Xml.XmlDictionaryReaderQuotas(), null))
{
doc = XElement.Load(jsonReader);
}
}
foreach (var ele in doc.Elements())
{
switch (ele.Name.LocalName)
{
case c_keyRootPath:
settings.RootPath = ele.Value;
break;
case c_keyPaths:
foreach (var item in ele.Elements("item"))
{
settings.Paths.Add(item.Value);
}
break;
case c_keyAdvanceTime:
{
int intValue;
if (int.TryParse(ele.Value, out intValue))
{
settings.AdvanceTime = intValue;
}
}
break;
case c_keyFadeTime:
{
int intValue;
if (int.TryParse(ele.Value, out intValue))
{
settings.FadeTime = intValue;
}
}
break;
case c_keyShowMetadata:
{
int intValue;
if (ele.Value.Equals(c_true, StringComparison.OrdinalIgnoreCase))
{
settings.ShowMetadata = true;
}
else if (ele.Value.Equals(c_false, StringComparison.OrdinalIgnoreCase))
{
settings.ShowMetadata = false;
}
else if (int.TryParse(ele.Value, out intValue))
{
settings.ShowMetadata = (intValue != 0);
}
}
break;
}
}
}
catch (Exception err)
{
// Suppress any exception and just return blank configuration.
// The only common form is FileNotFound.
System.Diagnostics.Debug.Assert(err is FileNotFoundException);
}
return(settings);
}
public static void Save(SlideShow.Settings settings)
{
// Merge existing settings
{
var existing = Load();
if (string.IsNullOrEmpty(settings.RootPath))
{
settings.RootPath = existing.RootPath;
}
if (settings.Paths.Count == 0)
{
foreach (var p in existing.Paths)
{
settings.Paths.Add(p);
}
}
if (!settings.AdvanceTime.HasValue)
{
settings.AdvanceTime = existing.AdvanceTime;
}
if (!settings.FadeTime.HasValue)
{
settings.FadeTime = existing.FadeTime;
}
if (!settings.ShowMetadata.HasValue)
{
settings.ShowMetadata = existing.ShowMetadata;
}
}
string path = Path.Combine(s_configPath, c_settingsFilename);
using (var writer = new StreamWriter(path, false, s_utf8))
{
writer.WriteLine("{");
bool first = true;
if (!string.IsNullOrEmpty(settings.RootPath))
{
first = false;
writer.Write($" \"{c_keyRootPath}\": \"{JsonEncode(settings.RootPath)}\"");
}
if (settings.Paths.Count > 0)
{
if (!first)
{
writer.WriteLine(",");
}
first = false;
writer.WriteLine($" \"{c_keyPaths}\": [");
bool first2 = true;
foreach (var val in settings.Paths)
{
if (!first2)
{
writer.WriteLine(",");
}
first2 = false;
writer.Write($" \"{JsonEncode(val)}\"");
}
writer.WriteLine();
writer.Write(" ]");
}
if (settings.AdvanceTime.HasValue)
{
if (!first)
{
writer.WriteLine(",");
}
first = false;
writer.Write($" \"{c_keyAdvanceTime}\": \"{JsonEncode(settings.AdvanceTime.ToString())}\"");
}
if (settings.FadeTime.HasValue)
{
if (!first)
{
writer.WriteLine(",");
}
first = false;
writer.Write($" \"{c_keyFadeTime}\": \"{JsonEncode(settings.FadeTime.ToString())}\"");
}
if (settings.ShowMetadata.HasValue)
{
if (!first)
{
writer.WriteLine(",");
}
first = false;
writer.Write($" \"{c_keyShowMetadata}\": \"{JsonEncode(settings.ShowMetadata.Value ? c_true : c_false)}\"");
}
writer.WriteLine();
writer.WriteLine("}");
}
}
