When I have started working on ScintillaNET in WPF, I have faced many difficulties. I have searched long and very hard across the internet for a simple examples using ScintillaNET. It was really very hard to find appropriate examples which can fulfill my requirements. Then I have done things with detailed explorations and sometimes hits and tried. So I am posting all my working examples here so that it can be helpful to others also.

Scintilla is a free source code editing component. It comes with complete source code and a license that permits use in any free project or commercial product.

Scintilla is a free-library that provides text-editing functions, with an emphasis on advanced features for source code editing. SciTE (cross-platform), Geany (cross-platform), Notepad (Windows), and Notepad2 (Windows) are examples of standalone editors based on Scintilla.

Apply Style on particular lines Using ScintillaNet

_scintilla.Styles[2].ForeColor = System.Drawing.Color.Red;

_scintilla.Styles[2].Underline = true;

_scintilla.Styles[2].Bold = true;

_scintilla.Styles[2].Font = new Font("Times New Roman", 14, FontStyle.Italic);

var lengthOfLine = _scintilla.NativeInterface.LineLength(4);

var startPosOfLine = _scintilla.NativeInterface.PositionFromLine(4);

_scintilla.GetRange(startPosOfLine, startPosOfLine lengthOfLine).SetStyle(2);

 

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Autocomplete Using ScintillaNet 

private void ScintillaOnKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{

var scintilla = sender as Scintilla;

if (e.KeyChar == ' ') return;

var pos = scintilla.NativeInterface.GetCurrentPos();

var word = scintilla.GetWordFromPosition(pos);

if (word == string.Empty) return;

var list = _autocompleteList.FindAll(item => item.StartsWith(word));

if (list.Count > 0)

scintilla.AutoComplete.Show(list);

else

scintilla.AutoComplete.Cancel();

}

 

Please note that you have to add all the keywords in AutoComlete list of Scintilla for working this example. You can use config file or you can directly insert keywords into Scintilla Autocomplete list.

 

Draw Red Squiggly spell check line Using ScintillaNet 

_scintilla.Indicators[0].Style = IndicatorStyle.Squiggle;

_scintilla.Indicators[0].Color = System.Drawing.Color.Red;

var range = _scintilla.GetRange(0, _scintilla.Text.Length - 1);

range.ClearIndicator(0);

Range r = _scintilla.GetRange(7, 15);

r.SetIndicator(0);

---

Highlight Matched Words Using ScintillaNet 

private void ScintillaOnSelectionChanged(object sender, EventArgs e)
{

_scintilla.Indicators[1].Style = IndicatorStyle.RoundBox;

_scintilla.Indicators[1].Color = System.Drawing.Color.SpringGreen;

var range = _scintilla.GetRange(0, _scintilla.Text.Length - 1);

range.ClearIndicator(1);

if (_scintilla.Selection.Start != _scintilla.Selection.End)
{

string selectedWord = _scintilla.Selection.Text;

_scintilla.FindReplace.Flags = SearchFlags.WholeWord;

IList<Range> ranges = _scintilla.FindReplace.FindAll(selectedWord);

foreach (var r in ranges) { r.SetIndicator(1); }
}

}

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Folding Feature Using ScintillaNet in WPF

private readonly 
Dictionary<string, string> dict = new Dictionary<string, string>{ {"if", "endif"}, 
{"for", "next"},{"while", "endwhile"},{"do", "loop"}, {"else", "endif"}, {"elseif", "endif"}};

private readonly Regex exp = new Regex(@"b(if|for|while|do|else|elseif|region)b");

 

private void SetFolding(Scintilla scintilla)
{
var folding = new List();
var currentLevel = 1024;
var keywordStack = new Stack();

foreach (Line line in scintilla.Lines)
{
var match = exp.Match(line.Text);
if (match.Success)
{
var key = new Keyword { Else = (match.Value == “else” || match.Value == “elseif”), Value = dict[match.Value] };
keywordStack.Push(key);
folding.Add( new LineOptions { IsFoldPoint = true, Level = currentLevel, Number = line.Number });
currentLevel ;
}
elseif (keywordStack.Count != 0 && line.Text.Contains(keywordStack.Peek().Value))
{
if (keywordStack.Peek().Else)
{
keywordStack.Pop();
currentLevel–-;
}
keywordStack.Pop();
currentLevel–-;
folding.Add( new LineOptions { IsFoldPoint = false, Level = currentLevel, Number = line.Number });
}
else
{
folding.Add(new LineOptions { IsFoldPoint = false, Level = currentLevel, Number = line.Number });
}
}

foreach (var lineConfig in folding)
{
scintilla.Lines[lineConfig.Number].IsFoldPoint = lineConfig.IsFoldPoint;
scintilla.Lines[lineConfig.Number].FoldLevel = lineConfig.Level;
}
}

public class LineOptions
{
public int Level { get; set; }
public bool IsFoldPoint { get; set; }
public int Number { get; set; }
}

public class Keyword
{
public bool Else { get; set; }
public string Value { get; set; }
}

 

 Highlight particular line Using ScintillaNet 

private Marker marker;
private void AddMarker(Scintilla scintilla, int lineNumber)
{
marker = scintilla.Markers[0];
marker.Symbol = MarkerSymbol.Background;
marker.BackColor = Color.Yellow;

scintilla.Lines[lineNumber - 1].AddMarker(marker);
}

private void DeleteMarker(Scintilla scintilla)
{
var lineCount = scintilla.Lines.Count;

for (var i = 0; i < lineCount; i )
{
//to clear the background color unset the marker
scintilla.Lines[i].DeleteAllMarkers();
}
}

 Context Menu on ScintillaNet 

private ToolStripMenuItem menuItemCut;

private ToolStripMenuItem menuItemCopy;

private ToolStripMenuItem menuItemPaste;

private ToolStripMenuItem menuItemFind;

private ToolStripMenuItem menuItemFindReplace;

private ToolStripMenuItem menuItemGotoLine;

private ToolStripMenuItem menuItemInsert;

private ToolStripMenuItem [] subMenuItemsInsert;

private void ContextMenuForScintilla(Scintilla initScintilla)
{

var contextMenu = _scintilla.ContextMenuStrip = new ContextMenuStrip();

menuItemCut = new ToolStripMenuItem("Cut", null, (s, ea) => _scintilla.Clipboard.Cut());

contextMenu.Items.Add(menuItemCut);

menuItemCopy = new ToolStripMenuItem("Copy", null, (s, ea) => _scintilla.Clipboard.Copy());

contextMenu.Items.Add(menuItemCopy);

menuItemPaste = new ToolStripMenuItem("Paste", null, (s, ea) => _scintilla.Clipboard.Paste());

contextMenu.Items.Add(menuItemPaste);

contextMenu.Items.Add(new ToolStripSeparator());

menuItemFind = new ToolStripMenuItem("Find", null, (s, ea) => FindAndReplaceInteraction(FindReplaceEventArgs.CommandActions.Find, ea)) { ShortcutKeys = Keys.Control | Keys.F };

contextMenu.Items.Add(menuItemFind);

menuItemFindReplace = new ToolStripMenuItem("Find And Replace", null, (s, ea) => FindAndReplaceInteraction FindReplaceEventArgs.CommandActions.FindAndReplace, ea)) { ShortcutKeys = Keys.Control | Keys.H };

contextMenu.Items.Add(menuItemFindReplace);

menuItemGotoLine = new ToolStripMenuItem("Go To Line", null, (s, ea) => FindAndReplaceInteraction(FindReplaceEventArgs.CommandActions.GoToLine, ea)) { ShortcutKeys = Keys.Control | Keys.G };

contextMenu.Items.Add(menuItemGotoLine);

contextMenu.Items.Add( new ToolStripSeparator());

subMenuItemsInsert = new ToolStripMenuItem[2];

subMenuItemsInsert[0] = new ToolStripMenuItem("Keyword", null, (s, ea) => ShowKeywordBrowserCommand.Execute(true)) { ShortcutKeys = Keys.Control | Keys.Q };

subMenuItemsInsert[1] = new ToolStripMenuItem("Functions", null, (s, ea) => ShowFunctionsCommand.Execute(true));

menuItemInsert = new ToolStripMenuItem("Insert", null, initsubMenuItemsInsert);

contextMenu.Items.Add(menuItemInsert);
}

// This Event will open ContextMenu.
private void _initScintilla_MouseDown(object sender, MouseEventArgse)
{
if (e.Button == MouseButtons.Right)
{
initmenuItemCut.Enabled = _initScintilla.Clipboard.CanCut;

initmenuItemCopy.Enabled = _initScintilla.Clipboard.CanCopy;

initmenuItemPaste.Enabled = _initScintilla.Clipboard.CanPaste;
}
}