/// <summary>
/// Removes a control tag from the source code editor
/// </summary>
/// <param name='id'>
/// Identifier of the control.
/// </param>
public void RemoveControlTag(string id)
{
if (id == null)
{
throw new ArgumentNullException("Cannot find component by an empty string");
}
IComponent comp = host.GetComponent(id);
if (comp == null)
{
throw new InvalidOperationException("Component with that name doesn't exists: " + id);
}
XDocument doc = document.Parse().XDocument;
XElement tag = GetControlTag(doc.RootElement, id);
if (tag == null)
{
throw new InvalidOperationException("The the tag for the component was not found. ID: " + id);
}
DomRegion region;
if (tag.IsSelfClosing)
{
region = tag.Region;
}
else if (tag.IsClosed)
{
region = new DomRegion(tag.Region.Begin, tag.ClosingTag.Region.End);
}
else
{
throw new InvalidOperationException("The tag has no closing tag. It cannot be removed");
}
document.RemoveText(region);
}
/// <summary>
/// Checks the document for control tags, creates components and adds the to the IContainer.
/// Adds an id attributes to tags that are server controls but doesn't have an id attribute.
/// </summary>
void ParseControls()
{
// no need to serialize the document, if we add just an id attribute to a control
suppressSerialization = true;
// if an id tag was added the document changes
// so we parse the document each time it does
do
{
// get a fresh new AspNetParsedDocument
var doc = Parse();
// go through all the nodes of the document
foreach (XNode node in doc.XDocument.RootElement.AllDescendentElements)
{
// if a node is not a XElement, no need to check if it's a control
if (!(node is XElement))
{
continue;
}
var element = node as XElement;
// the controls have a tag prefix or runat="server" attribute
if (element.Name.HasPrefix || XDocumentHelper.IsRunAtServer(element))
{
string id = XDocumentHelper.GetAttributeValueCI(element.Attributes, "id");
// check the DesignContainer if a component for that node already exists
if (host.GetComponent(id) == null)
{
// create a component of type depending of the element
IComponent comp = ProcessControl(element);
if (comp == null)
{
continue;
}
// add id to the component, for later recognition if it has no ID attribute
if (String.IsNullOrEmpty(id))
{
var nameServ = host.GetService(typeof(INameCreationService)) as INameCreationService;
if (nameServ == null)
{
throw new Exception("Could not obtain INameCreationService from the DesignerHost.");
}
// insert the attribute to the element
host.AspNetSerializer.SetAttribtue(element, "id", nameServ.CreateName(host.Container, comp.GetType()));
updateEditorContent.WaitOne(); // wait until the changes have been applied to the document
break;
}
// we have a control component, add it to the container
this.host.Container.Add(comp, id);
// and parse its attributes for component properties
ProcessControlProperties(element, comp);
}
}
}
} while (txtDocDirty);
suppressSerialization = false;
}
/// <summary>
/// Serializes a XNode to a HTML tag. This is a recursive method.
/// </summary>
/// <param name='node'>
/// Node.
/// </param>
/// <param name='sb'>
/// A string builder instance.
/// </param>
void SerializeNode(XNode node, StringBuilder sb)
{
prevTagLocation = node.Region.End;
var element = node as XElement;
if (element == null)
{
return;
}
string id = XDocumentHelper.GetAttributeValueCI(element.Attributes, "id");
// Controls are runat="server" and have unique id in the Container
if (element.Name.HasPrefix || XDocumentHelper.IsRunAtServer(element))
{
IComponent component = host.GetComponent(id);
// HTML controls, doesn't need special rendering
var control = component as Control;
// genarete placeholder
if (control != null)
{
StringWriter strWriter = new StringWriter();
HtmlTextWriter writer = new HtmlTextWriter(strWriter);
control.RenderControl(writer);
writer.Close();
strWriter.Flush();
sb.Append(strWriter.ToString());
strWriter.Close();
if (!element.IsSelfClosing)
{
prevTagLocation = element.ClosingTag.Region.End;
}
return;
}
}
// strip script tags
if (element.Name.Name.ToLower() == "script")
{
return;
}
// the node is a html element
sb.AppendFormat("<{0}", element.Name.FullName);
// print the attributes
foreach (MonoDevelop.Xml.StateEngine.XAttribute attr in element.Attributes)
{
string name = attr.Name.Name.ToLower();
// strip runat and on* event attributes
if ((name != "runat") && (name.Substring(0, 2).ToLower() != "on"))
{
sb.AppendFormat(" {0}=\"{1}\"", attr.Name.FullName, attr.Value);
}
}
if (element.IsSelfClosing)
{
sb.Append(" />");
}
else
{
sb.Append(">");
// we are currentyl on the head tag
// add designer content - js and css
if (element.Name.Name.ToLower() == "head")
{
sb.Append(designerContext);
}
if (element.Name.Name.ToLower() == "body")
{
GetDesignerInitParams(sb);
}
// serializing the childnodes if any
foreach (MonoDevelop.Xml.StateEngine.XNode nd in element.Nodes)
{
// get the text before the openning tag of the child element
sb.Append(document.GetTextFromEditor(prevTagLocation, nd.Region.Begin));
// and the element itself
SerializeNode(nd, sb);
}
// printing the text after the closing tag of the child elements
int lastChildEndLine = element.Region.EndLine;
int lastChildEndColumn = element.Region.EndColumn;
// if the element have 1+ children
if (element.LastChild != null)
{
var lastChild = element.LastChild as MonoDevelop.Xml.StateEngine.XElement;
// the last child is an XML tag
if (lastChild != null)
{
// the tag is selfclosing
if (lastChild.IsSelfClosing)
{
lastChildEndLine = lastChild.Region.EndLine;
lastChildEndColumn = lastChild.Region.EndColumn;
// the tag is not selfclosing and has a closing tag
}
else if (lastChild.ClosingTag != null)
{
lastChildEndLine = lastChild.ClosingTag.Region.EndLine;
lastChildEndColumn = lastChild.ClosingTag.Region.EndColumn;
}
else
{
// TODO: the element is not closed. Warn the user
}
// the last child is not a XML element. Probably AspNet tag. TODO: find the end location of that tag
}
else
{
lastChildEndLine = element.LastChild.Region.EndLine;
lastChildEndLine = element.LastChild.Region.EndLine;
}
}
if (element.ClosingTag != null)
{
sb.Append(document.GetTextFromEditor(new TextLocation(lastChildEndLine, lastChildEndColumn), element.ClosingTag.Region.Begin));
prevTagLocation = element.ClosingTag.Region.End;
}
else
{
// TODO: the element is not closed. Warn the user
}
sb.AppendFormat("</{0}>", element.Name.FullName);
}
}