/// <summary>
/// Try to add or remove <paramref name="decoration"/> to the <paramref name="formatting"/> using <paramref name="needToAddDecoration"/>
/// </summary>
/// <param name="formatting"></param>
/// <param name="needToAddDecoration">Determines when the input <paramref name="decoration"/> should be added or removed</param>
private static TextFormattingRunProperties ApplyDecoration(
TextFormattingRunProperties formatting, bool needToAddDecoration, TextDecoration decoration)
{
if (formatting.TextDecorations.Contains(decoration) ^ needToAddDecoration)
{
// NOTE: directly creates a new instance from existing collection to correctly determines
// in the future that items are contained or not
var clone = new TextDecorationCollection(formatting.TextDecorations);
if (needToAddDecoration)
{
clone.Add(decoration);
}
else
{
clone.Remove(decoration);
}
return(formatting.SetTextDecorations(clone));
}
return(formatting);
}
private void UnderlineButton_OnClick(object sender, RoutedEventArgs e)
{
bool isChecked = (sender as ToggleButton).IsChecked ?? false;
if (isChecked)
{
RichTextBox.Selection.ApplyPropertyValue(Inline.TextDecorationsProperty, TextDecorations.Underline);
}
else
{
TextDecorationCollection textDecorations;
textDecorations = RichTextBox.Selection.GetPropertyValue(Inline.TextDecorationsProperty) as TextDecorationCollection;
if (textDecorations.Contains(TextDecorations.Underline[0]))
{
TextDecorationCollection noUnderline = new TextDecorationCollection(textDecorations);
noUnderline.Remove(TextDecorations.Underline[0]); //this is a bool, and could replace Contains above
RichTextBox.Selection.ApplyPropertyValue(Inline.TextDecorationsProperty, noUnderline);
}
}
}
public static void RemoveTextDecoration(TextDecorationCollection decoration)
{
object _decorations = GetRTBValue(TextBlock.TextDecorationsProperty);
if (_decorations != DependencyProperty.UnsetValue)
{
TextDecorationCollection textdecorations = (TextDecorationCollection)_decorations;
if (textdecorations.IsFrozen)
{
textdecorations = textdecorations.Clone();
}
foreach (TextDecoration each in decoration)
{
textdecorations.Remove(each);
}
SetRTBValue(TextBlock.TextDecorationsProperty, textdecorations, false);
}
}
private void ChangeTextStyle(object sender, RoutedEventArgs e)
{
if (Selection.Text.Length == 0)
{
return;
}
if (sender == Bold)
{
EditingCommands.ToggleBold.Execute(null, this);
}
else if (sender == Italic)
{
EditingCommands.ToggleItalic.Execute(null, this);
}
else if (sender == Underlined)
{
EditingCommands.ToggleUnderline.Execute(null, this);
}
else if (sender == Strikethrough)
{
TextPointer s = Selection.Start;
Span span = new Span(Selection.Start, Selection.End);
bool isstrikethrough = true;
foreach (Run item in span.Inlines)
{
bool flag = true;
foreach (TextDecoration dec in item.TextDecorations)
{
if (dec.Location == TextDecorationLocation.Strikethrough)
{
flag = false;
}
}
if (flag)
{
isstrikethrough = false; break;
}
}
Inline[] inlines = span.Inlines.ToArray();
for (int i = 0; i < inlines.Length; i++)
{
Run item = inlines[i] as Run;
TextDecorationCollection collection = item.TextDecorations.Clone();
if (isstrikethrough)
{
TextDecoration dec = null;
foreach (TextDecoration d in collection)
{
if (d.Location == TextDecorationLocation.Strikethrough)
{
dec = d;
}
}
if (dec != null)
{
collection.Remove(dec);
}
}
else
{
if (!item.TextDecorations.Contains(TextDecorations.Strikethrough[0]))
{
collection.Add(TextDecorations.Strikethrough);
}
}
Run r = new Run(item.Text, Selection.Start)
{
TextDecorations = collection, Background = item.Background, FontWeight = item.FontWeight, FontStyle = item.FontStyle, Foreground = item.Foreground
};
}
EditingCommands.Delete.Execute(null, this);
Selection.Select(s, Selection.Start);
}
else
{
if (Obfuscated.IsChecked == true)
{
Selection.ApplyPropertyValue(TextElement.BackgroundProperty, Brushes.Black);
}
else
{
Selection.ApplyPropertyValue(TextElement.BackgroundProperty, null);
}
}
}
