/// <summary>
/// Sets the value of a text element. If it does not exist it is created.
/// If multiple identically named items exists only the first one is set.
/// </summary>
/// <param name="parent">The parent element.</param>
/// <param name="name">The name of the item.</param>
/// <param name="value">The value to set.</param>
/// <param name="removeIfNullOrEmpty">If <c>true</c> and <para<paramref name="value"/> is <c>null</c> or empty, the item is removed rather than converted to a <see cref="StageNull"/></param>
public static void SetTextValue(this StageElement parent, string name, string value, bool removeIfNullOrEmpty = true)
{
bool remove = (removeIfNullOrEmpty && string.IsNullOrEmpty(value));
var item = parent.Item(name);
if (item == null)
{
if (!remove)
{
parent.Add(SerializationMaster.ToStageValue(name, value));
}
return;
}
if (item is StageAttribute)
{
throw new InvalidOperationException("Use SetTextAttribute to set text attributes.");
}
var nullItem = item as StageNull;
if (item != null)
{
if (value != null)
{
nullItem.Remove();
parent.Add(SerializationMaster.ToStageValue(name, value));
}
return;
}
var valueItem = item as StageValue;
if (item == null)
{
throw new InvalidOperationException("Only value elements can be set using this method.");
}
if (remove)
{
item.Remove();
}
else if (value == null)
{
item.Remove();
parent.Add(new StageNull(name));
}
else if (!valueItem.isText)
{
throw new InvalidOperationException("Cannot set a text value on a non-text value item.");
}
else
{
valueItem.value = SerializationMaster.ToString(value);
}
}
public static void AddTextValue(this StageContainer parent, string name, string value, bool onlyIfNotNullOrEmpty = true)
{
if (onlyIfNotNullOrEmpty && string.IsNullOrEmpty(value))
{
return;
}
parent.Add(SerializationMaster.ToStageValue(name, value));
}
public static void SetValue(this StageElement parent, string name, object value, bool removeIfNull = true)
{
bool flag = (!removeIfNull ? false : value == null);
StageItem stageItem = parent.Item(name);
if (stageItem == null)
{
if (!flag)
{
parent.Add(SerializationMaster.ToStageValue(name, value));
}
return;
}
if (stageItem is StageAttribute)
{
throw new InvalidOperationException("Use SetTextAttribute to set text attributes.");
}
StageNull stageNull = stageItem as StageNull;
if (stageItem != null)
{
if (value != null)
{
stageNull.Remove();
parent.Add(SerializationMaster.ToStageValue(name, value));
}
return;
}
StageValue str = stageItem as StageValue;
if (stageItem == null)
{
throw new InvalidOperationException("Only value elements can be set using this method.");
}
if (flag)
{
stageItem.Remove();
return;
}
if (value == null)
{
stageItem.Remove();
parent.Add(new StageNull(name));
return;
}
if (str.isText && !(value is string))
{
throw new InvalidOperationException("Use SetTextValue to set text values.");
}
str.@value = SerializationMaster.ToString(value);
}
