/// <summary>
/// Updates the foldings in this <see cref="FoldingManager"/> using the given new foldings.
/// This method will try to correlate new foldings with existing foldings and will attempt
/// to keep the state (<see cref="FoldingSection.IsFolded"/>) of existing foldings.
/// </summary>
/// <remarks>
/// Based on original code from: https://github.com/icsharpcode/AvalonEdit/blob/master/ICSharpCode.AvalonEdit/Folding/FoldingManager.cs
/// This custom version was created in order to fix an issue where only the first collapsed folding was preserved.
/// See: https://github.com/icsharpcode/AvalonEdit/issues/86
/// </remarks>
public static void UpdateFoldings(this FoldingManager manager, IEnumerable <NewFolding> newFoldings)
{
if (newFoldings == null)
{
throw new ArgumentNullException(nameof(newFoldings));
}
var oldFoldings = manager.AllFoldings.ToArray();
int oldFoldingIndex = 0;
int previousStartOffset = 0;
// Merge new foldings into old foldings so that sections keep being collapsed.
// Both oldFoldings and newFoldings are sorted by start offset.
foreach (var newFolding in newFoldings)
{
// ensure newFoldings are sorted correctly
if (newFolding.StartOffset < previousStartOffset)
{
throw new ArgumentException(nameof(newFoldings) + " must be sorted by start offset");
}
previousStartOffset = newFolding.StartOffset;
if (newFolding.StartOffset == newFolding.EndOffset)
{
continue; // ignore zero-length foldings
}
// Remove old foldings that were skipped.
while (oldFoldingIndex < oldFoldings.Length && newFolding.StartOffset > oldFoldings[oldFoldingIndex].StartOffset)
{
manager.RemoveFolding(oldFoldings[oldFoldingIndex++]);
}
// Reuse current folding if its matching.
FoldingSection section;
if (oldFoldingIndex < oldFoldings.Length && newFolding.StartOffset == oldFoldings[oldFoldingIndex].StartOffset)
{
section = oldFoldings[oldFoldingIndex++];
section.Length = newFolding.EndOffset - newFolding.StartOffset;
}
else
{
// No matching current folding; create a new one.
section = manager.CreateFolding(newFolding.StartOffset, newFolding.EndOffset);
section.IsFolded = newFolding.DefaultClosed;
section.Tag = newFolding;
}
section.Title = newFolding.Name;
}
// Remove all outstanding old foldings.
while (oldFoldingIndex < oldFoldings.Length)
{
var oldSection = oldFoldings[oldFoldingIndex++];
manager.RemoveFolding(oldSection);
}
}
private void UpdateFoldings()
{
if (Foldings == null)
{
return;
}
if (_foldingManager == null)
{
return;
}
_foldingManager.Clear();
foreach (var folding in Foldings)
{
var foldingSection = _foldingManager.CreateFolding(folding.StartOffset, folding.EndOffset);
foldingSection.Title = folding.Name;
foldingSection.IsFolded = folding.IsFolded;
}
}
void CreateDefaultEntries(string language, out IHighlightingItem defaultText, IList <IHighlightingItem> items)
{
// Create entry for "default text/background"
defaultText = new SimpleHighlightingItem(CustomizingHighlighter.DefaultTextAndBackground, ta => ta.Document.Text = "Normal text")
{
Foreground = SystemColors.WindowTextColor,
Background = SystemColors.WindowColor
};
defaultText = new CustomizedHighlightingItem(customizationList, defaultText, language, canSetFont: false);
defaultText.PropertyChanged += item_PropertyChanged;
items.Add(defaultText);
// Create entry for "Selected text"
IHighlightingItem selectedText = new SimpleHighlightingItem(
CustomizingHighlighter.SelectedText,
ta => {
ta.Document.Text = "Selected text";
ta.Selection = Selection.Create(ta, 0, 13);
})
{
Foreground = SystemColors.HighlightTextColor,
Background = SystemColors.HighlightColor
};
selectedText = new CustomizedHighlightingItem(customizationList, selectedText, language, canSetFont: false);
selectedText.PropertyChanged += item_PropertyChanged;
items.Add(selectedText);
// Create entry for "Non-printable characters"
IHighlightingItem nonPrintChars = new SimpleHighlightingItem(
CustomizingHighlighter.NonPrintableCharacters,
ta => {
ta.Document.Text = " \r \r\n \n";
})
{
Foreground = Colors.LightGray
};
nonPrintChars = new CustomizedHighlightingItem(customizationList, nonPrintChars, language, canSetFont: false, canSetBackground: false);
nonPrintChars.PropertyChanged += item_PropertyChanged;
items.Add(nonPrintChars);
// Create entry for "Line numbers"
IHighlightingItem lineNumbers = new SimpleHighlightingItem(
CustomizingHighlighter.LineNumbers,
ta => {
ta.Document.Text = "These are just" + Environment.NewLine +
"multiple" + Environment.NewLine +
"lines of" + Environment.NewLine +
"text";
})
{
Foreground = Colors.Gray
};
lineNumbers = new CustomizedHighlightingItem(customizationList, lineNumbers, language, canSetFont: false, canSetBackground: false);
lineNumbers.PropertyChanged += item_PropertyChanged;
items.Add(lineNumbers);
// Create entry for "Bracket highlight"
IHighlightingItem bracketHighlight = new SimpleHighlightingItem(
BracketHighlightRenderer.BracketHighlight,
ta => {
ta.Document.Text = "(simple) example";
XshdSyntaxDefinition xshd = (XshdSyntaxDefinition)languageComboBox.SelectedItem;
if (xshd == null)
{
return;
}
var customizationsForCurrentLanguage = customizationList.Where(c => c.Language == null || c.Language == xshd.Name);
BracketHighlightRenderer.ApplyCustomizationsToRendering(bracketHighlighter, customizationsForCurrentLanguage);
bracketHighlighter.SetHighlight(new BracketSearchResult(0, 1, 7, 1));
})
{
Foreground = BracketHighlightRenderer.DefaultBorder,
Background = BracketHighlightRenderer.DefaultBackground
};
bracketHighlight = new CustomizedHighlightingItem(customizationList, bracketHighlight, language, canSetFont: false);
bracketHighlight.PropertyChanged += item_PropertyChanged;
items.Add(bracketHighlight);
// Create entry for "Current Line highlight"
IHighlightingItem currentLineHighlight = new SimpleHighlightingItem(
CustomizingHighlighter.CurrentLineHighlighter,
ta => {
ta.Document.Text = "example text line";
ta.TextView.Options.HighlightCurrentLine = true;
})
{
Foreground = Color.FromArgb(52, 0, 255, 110),
Background = Color.FromArgb(22, 20, 220, 224)
};
currentLineHighlight = new CustomizedHighlightingItem(customizationList, currentLineHighlight, language, canSetFont: false);
currentLineHighlight.PropertyChanged += item_PropertyChanged;
items.Add(currentLineHighlight);
// Create entry for "Folding controls"
IHighlightingItem foldingControls = new SimpleHighlightingItem(
FoldingControls,
ta => {
ta.Document.Text = "This" + Environment.NewLine +
"is a folding" + Environment.NewLine +
"example";
foldingManager.CreateFolding(0, 10);
})
{
Foreground = Colors.Gray,
Background = Colors.White
};
foldingControls = new CustomizedHighlightingItem(customizationList, foldingControls, language, canSetFont: false);
foldingControls.PropertyChanged += item_PropertyChanged;
items.Add(foldingControls);
// Create entry for "Selected folding controls"
IHighlightingItem selectedFoldingControls = new SimpleHighlightingItem(
FoldingSelectedControls,
ta => {
ta.Document.Text = "This" + Environment.NewLine +
"is a folding" + Environment.NewLine +
"example";
foldingManager.CreateFolding(0, 10);
})
{
Foreground = Colors.Black,
Background = Colors.White
};
selectedFoldingControls = new CustomizedHighlightingItem(customizationList, selectedFoldingControls, language, canSetFont: false);
selectedFoldingControls.PropertyChanged += item_PropertyChanged;
items.Add(selectedFoldingControls);
// Create entry for "Folding text markers"
IHighlightingItem foldingTextMarker = new SimpleHighlightingItem(
FoldingTextMarkers,
ta => {
ta.Document.Text = "This" + Environment.NewLine +
"is a folding" + Environment.NewLine +
"example";
foldingManager.CreateFolding(0, 10).IsFolded = true;
})
{
Foreground = Colors.Gray
};
foldingTextMarker = new CustomizedHighlightingItem(customizationList, foldingTextMarker, language, canSetFont: false, canSetBackground: false);
foldingTextMarker.PropertyChanged += item_PropertyChanged;
items.Add(foldingTextMarker);
IHighlightingItem linkText = new SimpleHighlightingItem(
CustomizingHighlighter.LinkText,
ta => {
ta.Document.Text = "http://icsharpcode.net" + Environment.NewLine + "*****@*****.**";
})
{
Foreground = Colors.Blue,
Background = Colors.Transparent
};
linkText = new CustomizedHighlightingItem(customizationList, linkText, language, canSetFont: false);
linkText.PropertyChanged += item_PropertyChanged;
items.Add(linkText);
IHighlightingItem errorMarker = new SimpleHighlightingItem(
ErrorPainter.ErrorColorName,
ta => {
ta.Document.Text = "some error";
ITextMarker marker = textMarkerService.Create(0, 5);
marker.Tag = (Action <IHighlightingItem, ITextMarker>) delegate(IHighlightingItem item, ITextMarker m) {
m.MarkerTypes = TextMarkerTypes.SquigglyUnderline;
m.MarkerColor = item.Foreground;
};
})
{
Foreground = Colors.Red
};
errorMarker = new CustomizedHighlightingItem(customizationList, errorMarker, language, canSetFont: false, canSetBackground: false);
errorMarker.PropertyChanged += item_PropertyChanged;
items.Add(errorMarker);
IHighlightingItem warningMarker = new SimpleHighlightingItem(
ErrorPainter.WarningColorName,
ta => {
ta.Document.Text = "some warning";
ITextMarker marker = textMarkerService.Create(0, 5);
marker.Tag = (Action <IHighlightingItem, ITextMarker>) delegate(IHighlightingItem item, ITextMarker m) {
m.MarkerTypes = TextMarkerTypes.SquigglyUnderline;
m.MarkerColor = item.Foreground;
};
})
{
Foreground = Colors.Orange
};
warningMarker = new CustomizedHighlightingItem(customizationList, warningMarker, language, canSetFont: false, canSetBackground: false);
warningMarker.PropertyChanged += item_PropertyChanged;
items.Add(warningMarker);
IHighlightingItem messageMarker = new SimpleHighlightingItem(
ErrorPainter.MessageColorName,
ta => {
ta.Document.Text = "some message";
ITextMarker marker = textMarkerService.Create(0, 5);
marker.Tag = (Action <IHighlightingItem, ITextMarker>) delegate(IHighlightingItem item, ITextMarker m) {
m.MarkerTypes = TextMarkerTypes.SquigglyUnderline;
m.MarkerColor = item.Foreground;
};
})
{
Foreground = Colors.Blue
};
messageMarker = new CustomizedHighlightingItem(customizationList, messageMarker, language, canSetFont: false, canSetBackground: false);
messageMarker.PropertyChanged += item_PropertyChanged;
items.Add(messageMarker);
IHighlightingItem breakpointMarker = new SimpleHighlightingItem(
BookmarkBase.BreakpointMarkerName,
ta => {
ta.Document.Text = "some code with a breakpoint";
ITextMarker marker = textMarkerService.Create(0, ta.Document.TextLength);
marker.Tag = (Action <IHighlightingItem, ITextMarker>) delegate(IHighlightingItem item, ITextMarker m) {
m.BackgroundColor = item.Background;
m.ForegroundColor = item.Foreground;
};
})
{
Background = BookmarkBase.BreakpointDefaultBackground,
Foreground = BookmarkBase.BreakpointDefaultForeground
};
breakpointMarker = new CustomizedHighlightingItem(customizationList, breakpointMarker, language, canSetFont: false);
breakpointMarker.PropertyChanged += item_PropertyChanged;
items.Add(breakpointMarker);
IHighlightingItem currentStatementMarker = new SimpleHighlightingItem(
BookmarkBase.CurrentLineBookmarkName,
ta => {
ta.Document.Text = "current statement line";
ITextMarker marker = textMarkerService.Create(0, ta.Document.TextLength);
marker.Tag = (Action <IHighlightingItem, ITextMarker>) delegate(IHighlightingItem item, ITextMarker m) {
m.BackgroundColor = item.Background;
m.ForegroundColor = item.Foreground;
};
})
{
Background = BookmarkBase.CurrentLineDefaultBackground,
Foreground = BookmarkBase.CurrentLineDefaultForeground
};
currentStatementMarker = new CustomizedHighlightingItem(customizationList, currentStatementMarker, language, canSetFont: false);
currentStatementMarker.PropertyChanged += item_PropertyChanged;
items.Add(currentStatementMarker);
IHighlightingItem columnRuler = new SimpleHighlightingItem(
CustomizingHighlighter.ColumnRuler,
ta => {
ta.Document.Text = "some line with a lot of text";
ta.TextView.Options.ColumnRulerPosition = 15;
ta.TextView.Options.ShowColumnRuler = true;
})
{
Foreground = Colors.LightGray
};
columnRuler = new CustomizedHighlightingItem(customizationList, columnRuler, language, canSetFont: false, canSetBackground: false);
columnRuler.PropertyChanged += item_PropertyChanged;
items.Add(columnRuler);
}
void CreateDefaultEntries(string language, out IHighlightingItem defaultText)
{
// Create entry for "default text/background"
defaultText = new SimpleHighlightingItem(CustomizableHighlightingColorizer.DefaultTextAndBackground, ta => ta.Document.Text = "Normal text")
{
Foreground = SystemColors.WindowTextColor,
Background = SystemColors.WindowColor
};
defaultText = new CustomizedHighlightingItem(customizationList, defaultText, null, canSetFont: false);
if (language != null)
{
defaultText = new CustomizedHighlightingItem(customizationList, defaultText, language, canSetFont: false);
}
defaultText.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(defaultText);
// Create entry for "Selected text"
IHighlightingItem selectedText = new SimpleHighlightingItem(
CustomizableHighlightingColorizer.SelectedText,
ta => {
ta.Document.Text = "Selected text";
ta.Selection = Selection.Create(ta, 0, 13);
})
{
Foreground = SystemColors.HighlightTextColor,
Background = SystemColors.HighlightColor
};
selectedText = new CustomizedHighlightingItem(customizationList, selectedText, null, canSetFont: false);
if (language != null)
{
selectedText = new CustomizedHighlightingItem(customizationList, selectedText, language, canSetFont: false);
}
selectedText.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(selectedText);
// Create entry for "Non-printable characters"
IHighlightingItem nonPrintChars = new SimpleHighlightingItem(
CustomizableHighlightingColorizer.NonPrintableCharacters,
ta => {
ta.Document.Text = " \r \r\n \n";
})
{
Foreground = Colors.LightGray
};
nonPrintChars = new CustomizedHighlightingItem(customizationList, nonPrintChars, null, canSetFont: false, canSetBackground: false);
if (language != null)
{
nonPrintChars = new CustomizedHighlightingItem(customizationList, nonPrintChars, language, canSetFont: false);
}
nonPrintChars.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(nonPrintChars);
// Create entry for "Line numbers"
IHighlightingItem lineNumbers = new SimpleHighlightingItem(
CustomizableHighlightingColorizer.LineNumbers,
ta => {
ta.Document.Text = "These are just" + Environment.NewLine +
"multiple" + Environment.NewLine +
"lines of" + Environment.NewLine +
"text";
})
{
Foreground = Colors.Gray
};
lineNumbers = new CustomizedHighlightingItem(customizationList, lineNumbers, null, canSetFont: false, canSetBackground: false);
if (language != null)
{
lineNumbers = new CustomizedHighlightingItem(customizationList, lineNumbers, language, canSetFont: false);
}
lineNumbers.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(lineNumbers);
// Create entry for "Bracket highlight"
IHighlightingItem bracketHighlight = new SimpleHighlightingItem(
BracketHighlightRenderer.BracketHighlight,
ta => {
ta.Document.Text = "(simple) example";
XshdSyntaxDefinition xshd = (XshdSyntaxDefinition)languageComboBox.SelectedItem;
if (xshd == null)
{
return;
}
var customizationsForCurrentLanguage = customizationList.Where(c => c.Language == null || c.Language == xshd.Name);
BracketHighlightRenderer.ApplyCustomizationsToRendering(bracketHighlighter, customizationsForCurrentLanguage);
bracketHighlighter.SetHighlight(new BracketSearchResult(0, 1, 7, 1));
})
{
Foreground = BracketHighlightRenderer.DefaultBorder,
Background = BracketHighlightRenderer.DefaultBackground
};
bracketHighlight = new CustomizedHighlightingItem(customizationList, bracketHighlight, null, canSetFont: false);
if (language != null)
{
bracketHighlight = new CustomizedHighlightingItem(customizationList, bracketHighlight, language, canSetFont: false);
}
bracketHighlight.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(bracketHighlight);
// Create entry for "Folding controls"
IHighlightingItem foldingControls = new SimpleHighlightingItem(
FoldingControls,
ta => {
ta.Document.Text = "This" + Environment.NewLine +
"is a folding" + Environment.NewLine +
"example";
foldingManager.CreateFolding(0, 10);
})
{
Foreground = Colors.Gray,
Background = Colors.White
};
foldingControls = new CustomizedHighlightingItem(customizationList, foldingControls, null, canSetFont: false);
if (language != null)
{
foldingControls = new CustomizedHighlightingItem(customizationList, foldingControls, language, canSetFont: false);
}
foldingControls.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(foldingControls);
// Create entry for "Selected folding controls"
IHighlightingItem selectedFoldingControls = new SimpleHighlightingItem(
FoldingSelectedControls,
ta => {
ta.Document.Text = "This" + Environment.NewLine +
"is a folding" + Environment.NewLine +
"example";
foldingManager.CreateFolding(0, 10);
})
{
Foreground = Colors.Black,
Background = Colors.White
};
selectedFoldingControls = new CustomizedHighlightingItem(customizationList, selectedFoldingControls, null, canSetFont: false);
if (language != null)
{
selectedFoldingControls = new CustomizedHighlightingItem(customizationList, selectedFoldingControls, language, canSetFont: false);
}
selectedFoldingControls.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(selectedFoldingControls);
// Create entry for "Folding text markers"
IHighlightingItem foldingTextMarker = new SimpleHighlightingItem(
FoldingTextMarkers,
ta => {
ta.Document.Text = "This" + Environment.NewLine +
"is a folding" + Environment.NewLine +
"example";
foldingManager.CreateFolding(0, 10).IsFolded = true;
})
{
Foreground = Colors.Gray
};
foldingTextMarker = new CustomizedHighlightingItem(customizationList, foldingTextMarker, null, canSetFont: false, canSetBackground: false);
if (language != null)
{
foldingControls = new CustomizedHighlightingItem(customizationList, foldingTextMarker, language, canSetFont: false, canSetBackground: false);
}
foldingTextMarker.PropertyChanged += item_PropertyChanged;
listBox.Items.Add(foldingTextMarker);
}