Programatically modifying a RadDocument prior to assigning it to a RadRichTextBox

[Oliver]

For a proof of concept linked to my question described here (see my last post) I have begun experimenting with modifying a deserialized RadDocument prior to assigning it to the control. The idea behind this is to store links to external resources using the standard HyperlinkRangeStart-HyperLink-HyperlinkRangeStop concept and transforming those hyperlinks into custom controls hosted in InlineUIContainer objects.To test if this can work I've tried the following:

var doc = provider.Import(xml);

var hyperLinks = doc.EnumerateChildrenOfType<HyperlinkRangeStart>();
foreach (var link in hyperLinks)
{
var parent = link.Parent;
parent.Children.Remove(link);

InlineUIContainer container = new InlineUIContainer(new Button(), new Size(400, 300));
parent.Children.Add(container);
}

doc.History.Clear();

// BOOOM
doc.UpdateLayout();

This will crash in UpdateLayout or when I assign the document to a RadRichTextBox with the following exception:

InvalidOperationException "Stack Empty"

"   at System.Collections.Generic.Stack`1.Pop()\r\n   at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element, Stack`1 fieldStartsStack) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 541\r\n   at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element, Stack`1 fieldStartsStack) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 524\r\n   at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element, Stack`1 fieldStartsStack) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 524\r\n   at Telerik.Windows.Documents.Layout.LayoutBox.UpdateFieldProperties(DocumentElement element) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutBox.cs:line 520\r\n   at Telerik.Windows.Documents.Layout.DocumentLayoutBox.UpdateGlobalProperties() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\DocumentLayoutBox.cs:line 276\r\n   at Telerik.Windows.Documents.Layout.DocumentLayoutBox.MeasureOverride(SizeF availableSize) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\DocumentLayoutBox.cs:line 259\r\n   at Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(SizeF availableSize) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutElement.cs:line 1473\r\n   at Telerik.Windows.Documents.Layout.LayoutElement.Measure(SizeF availableSize) in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutElement.cs:line 1352\r\n   at Telerik.Windows.Documents.Layout.ContextLayoutManager.UpdateLayout() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\ContextLayoutManager.cs:line 360\r\n   at Telerik.Windows.Documents.Layout.LayoutElement.UpdateLayout() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Layout\\LayoutElement.cs:line 982\r\n   at Telerik.Windows.Documents.Model.RadDocument.UpdateLayout() in c:\\TB\\101\\WPF_Scrum\\Release_WPF_40\\Sources\\Development\\Documents\\Model\\RadDocument.cs:line 706\r\n   at Mindspace.DocumentEditors.RichTextDocumentEditor.<SetEditorContent>b__3() in C:\\Users\\oliver\\Projects\\Mindspace\\SilverlightClient\\DocumentEditors\\RichTextDocumentEditor.cs:line 296"

[Oliver]

Would be nice if someone from Telerik staff could comment on this because it's quite urgent.

[Iva Toteva]

Hi Oliver,

The source code in your snippet should be modified as follows:

var hyperLinks = document.EnumerateChildrenOfType<HyperlinkRangeStart>().Reverse();
foreach(HyperlinkRangeStart link inhyperLinks)
{
    document.CaretPosition.MoveToInline((InlineLayoutBox)link.FirstLayoutBox, 0);
    InlineUIContainer container = newInlineUIContainer(newButton(), newSize(400, 300));
    document.InsertInline(container);
    document.CaretPosition.Reset();
    link.End.Parent.Children.Remove(link.End);
    link.Parent.Children.Remove(link);
}
document.UpdateLayout();

In the code above we remove both HyperlinkRangeStart and HyperlinkRangeEnd, as they are pair. We also should add the InlineUIContainer at the position of the HyperlinkRangeStart.

Greetings,
Iva
the Telerik team