/// <summary>
/// Occurs when a new update is added to the Live Editing update collection.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="UpdateAddedEventArgs"/> instance containing the event data.</param>
protected void Updates_UpdateAdded(object sender, UpdateAddedEventArgs e)
{
ItemUpdate update = e.Update as ItemUpdate;
if (update != null)
{
List <Item> affectedItems = Utility.FindControls <Item>(item => item.GetParsedNodeId() == update.NodeId &&
item.Field == update.Field,
Page.Master);
foreach (Item affectedItem in affectedItems)
{
// render the item, temporarily disabling the live editing special output
StringWriter itemRenderOutput = new StringWriter();
bool liveEditingWasDisabled = affectedItem.LiveEditingDisabled;
affectedItem.LiveEditingDisabled = true;
affectedItem.RenderControl(new HtmlTextWriter(itemRenderOutput));
affectedItem.LiveEditingDisabled = liveEditingWasDisabled;
// add the item's contents to the output
HtmlGenericControl itemUpdate = new HtmlGenericControl("umbraco:itemupdate");
itemUpdate.Attributes["itemId"] = affectedItem.ItemId.ToString();
itemUpdate.InnerHtml = template.ParseInternalLinks(itemRenderOutput.ToString());
itemUpdate.EnableViewState = false;
m_Manager.AddClientOutput(itemUpdate);
}
}
}
/// <summary>
/// Gets the datatype for the specified item.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>The datatype.</returns>
protected virtual IDataType GetDataType(Item item)
{
// find the property
Property editProperty = null;
if (item.GetParsedNodeId().HasValue)
{
Document document = new Document(item.GetParsedNodeId().Value);
editProperty = document.getProperty(item.Field);
}
// find the data type
IDataType editDataType = null;
if (editProperty != null)
{
PropertyType editPropertyType = editProperty.PropertyType;
editDataType = editPropertyType.DataTypeDefinition.DataType;
}
else
{
if (item.PageElements[item.Field] != null)
{
editDataType = new PageElementEditor(item);
}
}
// only allow editing if we the data can be previewed
IDataWithPreview data = editDataType.Data as IDataWithPreview;
if (data == null)
{
editDataType = null;
}
else
{
if (editProperty != null)
{
data.PropertyId = editProperty.Id;
}
data.PreviewMode = true;
// display the latest updated value if available
ItemUpdate latestUpdate
= LiveEditingContext.Updates.GetLatest <ItemUpdate>(u => u.NodeId == item.GetParsedNodeId() &&
u.Field == item.Field);
if (latestUpdate != null)
{
data.Value = latestUpdate.Data;
}
}
return(editDataType);
}
/// <summary>
/// Renders the field contents.
/// Checks via the NodeId attribute whether to fetch data from another page than the current one.
/// </summary>
/// <returns>
/// A string of field contents (macros not parsed)
/// </returns>
protected override string GetFieldContents(Item item)
{
// check if an update has been made to the field, and use the updated value istead
IUpdateList updates = UmbracoContext.Current.LiveEditingContext.Updates;
ItemUpdate latestUpdate = updates.GetLatest <ItemUpdate>(u => u.NodeId == item.GetParsedNodeId() &&
u.Field == item.Field);
if (latestUpdate != null)
{
return(latestUpdate.Data as string); //can't use ToString() as a null value will throw an exception
}
else
{
return(base.GetFieldContents(item));
}
}
/// <summary>
/// Stops editing the current item.
/// </summary>
/// <remarks>Currently triggered by the client.</remarks>
protected virtual void StopEditing()
{
if (ItemId != 0)
{
Debug.Assert(HasControls());
if (m_DataType != null)
{
// load the postback data into the data editor
m_DataType.DataEditor.Save();
// store the update with the new data
Item item = FindItem(ItemId);
ItemUpdate update = new ItemUpdate(item.GetParsedNodeId(), item.Field, m_DataType.Data.Value);
LiveEditingContext.Updates.Add(update);
}
ItemId = 0;
}
}
/// <summary>
/// Stops editing the current item.
/// </summary>
/// <remarks>Currently triggered by the client.</remarks>
protected virtual void StopEditing()
{
if (ItemId != 0)
{
Debug.Assert(HasControls());
if (m_DataType != null)
{
// load the postback data into the data editor
m_DataType.DataEditor.Save();
// store the update with the new data
Item item = FindItem(ItemId);
ItemUpdate update = new ItemUpdate(item.GetParsedNodeId(), item.Field, m_DataType.Data.Value);
LiveEditingContext.Updates.Add(update);
}
ItemId = 0;
}
}
