I have a very simple RichTextBox control in a silverlight 5 application.
<RichTextBox x:Name="rtbControl"
Height="Auto"
ContentChanged="rtbControl_ContentChanged" />
As the data is changed, i capture it in a local variable as so:
private void rtbControl_ContentChanged(object sender, ContentChangedEventArgs e)
{
RichTextContent = rtbControl.Xaml;
}
All works. However, if I type in just a few words and examine the <Paragraph>
markup, it is HUGE! A snippet is below. Is there a way to not have all the Typography stuff in the markup? Why is it there and is it needed? Is there a way to remove it?
<Section xml:space="preserve" HasTrailingParagraphBreakOnPaste="False" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<Paragraph FontSize="11" FontFamily="Segoe UI" Foreground="#FF000000" FontWeight="Normal" FontStyle="Normal" FontStretch="Normal"
CharacterSpacing="0" Typography.AnnotationAlternates="0" Typography.EastAsianExpertForms="False" Typography.EastAsianLanguage="Normal"
Typography.EastAsianWidths="Normal" Typography.StandardLigatures="True" Typography.ContextualLigatures="True"
Typography.DiscretionaryLigatures="False" Typography.HistoricalLigatures="False" Typography.StandardSwashes="0" Typography.ContextualSwashes="0"
Typography.ContextualAlternates="True" Typography.StylisticAlternates="0" Typography.StylisticSet1="False" Typography.StylisticSet2="False"
Typography.StylisticSet3="False" Typography.StylisticSet4="False" Typography.StylisticSet5="False" Typography.StylisticSet6="False" Typography.StylisticSet7="False"
Typography.StylisticSet8="False" Typography.StylisticSet9="False" Typography.StylisticSet10="False" Typography.StylisticSet11="False"
Typography.StylisticSet12="False" Typography.StylisticSet13="False" Typography.StylisticSet14="False" Typography.StylisticSet15="False"
Typography.StylisticSet16="False" Typography.StylisticSet17="False" Typography.StylisticSet18="False" Typography.StylisticSet19="False"
Typography.StylisticSet20="False" Typography.Capitals="Normal" Typography.CapitalSpacing="False" Typography.Kerning="True" Typography.CaseSensitiveForms="False"
Typography.HistoricalForms="False" Typography.Fraction="Normal" Typography.NumeralStyle="Normal" Typography.NumeralAlignment="Normal" Typography.SlashedZero="False"
Typography.MathematicalGreek="False" Typography.Variants="Normal" TextOptions.TextHintingMode="Fixed" TextOptions.TextFormattingMode="Ideal"
TextOptions.TextRenderingMode="Auto" TextAlignment="Left" LineHeight="0" LineStackingStrategy="MaxHeight"><Run>was it a </Run><Run TextDecorations="Underline">bad
</Run><Run>blah? or </Run></Paragraph></section>
I thought I would share my solution to help others... its been in place for several months and I havent seen any bad side effects.
I created some extention methods to assist in removing the Typography attributes.
public static class RichTextBoxExtensions {
// <summary>
/// Removes any xml tag with the prefix given from a string
/// </summary>
/// <param name="XMLString"></param>
/// <param name="TagPrefix"></param>
/// <returns></returns>
public static string RemoveXMLAttributesFromNode(this string XMLString, string prefix)
{
//Match [Prefix][any number of Not =][=]["][any number of Not "]["][ ] <-must have space!!!
string replace = prefix + "[^\\=]*=\"[^\"]*\" ";
return Regex.Replace(XMLString, replace, string.Empty);
}
/// <summary>
/// Removes any xml tag with prefixed by an element in unWanted
/// </summary>
/// <param name="XMLString"></param>
/// <param name="TagPrefix"></param>
/// <returns></returns>
public static string RemoveXMLAttributesFromNode(this string XMLString, List<string> unWanted)
{
foreach (string prefix in unWanted)
{
//Match [Prefix][any number of Not =][=]["][any number of Not "]["][ ] <-must have space!!!
string replace = prefix + "[^\\=]*=\"[^\"]*\" ";
XMLString = Regex.Replace(XMLString, replace, string.Empty);
}
return XMLString;
}
Next, right before I save my string to the database, I remove the bad attributes as so:
List<string> badAttributes = new List<string>();
badAttributes.Add("Typography");
var ffText = ffi.FreeFormText == null ? null : ffi.FreeFormText.RemoveXMLAttributesFromNode(badAttributes);
I have not seen any issues when re-rendering the RTF after removing these attributes. Hope this solution helps someone!
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