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Fast Colored TextBox for Syntax Highlighting

, 12 Jul 2014
Custom text editor with syntax highlighting
example-noexe.zip
example.zip
FastColoredTextBox.zip
FastColoredTextBox
FastColoredTextBox.suo
FastColoredTextBoxVS2008.suo
FastColoredTextBox
SyntaxHighlighter.cs.old
bin
Debug
FastColoredTextBox.dll
obj
Debug
FastColoredTextBox.dll
FastColoredTextBoxNS.FastColoredTextBox.resources
FastColoredTextBoxNS.FindForm.resources
FastColoredTextBoxNS.GoToForm.resources
FastColoredTextBoxNS.ReplaceForm.resources
Release
FastColoredTextBox.dll
FastColoredTextBoxNS.FastColoredTextBox.resources
FastColoredTextBoxNS.FindForm.resources
FastColoredTextBoxNS.ReplaceForm.resources
GenerateResource-ResGen.read.1.tlog
GenerateResource-ResGen.write.1.tlog
Properties
Tester
Tester.csproj.user
bin
Debug
FastColoredTextBox.dll
TabStrip.dll
Tester.exe
Tester.vshost.exe
obj
x86
Debug
Tester.AutocompleteSample.resources
Tester.AutocompleteSample2.resources
Tester.AutoIndentSample.resources
Tester.BilingualHighlighterSample.resources
Tester.BookmarksSample.resources
Tester.ConsoleSample.resources
Tester.CustomFoldingSample.resources
Tester.CustomHint.resources
Tester.CustomStyleSample.resources
Tester.CustomTextSourceSample.resources
Tester.DynamicSyntaxHighlighting.resources
Tester.exe
Tester.GifImageDrawingSample.resources
Tester.HintSample.resources
Tester.HyperlinkSample.resources
Tester.IMEsample.resources
Tester.JokeSample.resources
Tester.LazyLoadingSample.resources
Tester.LoggerSample.resources
Tester.MainForm.resources
Tester.MarkerToolSample.resources
Tester.PowerfulCSharpEditor.resources
Tester.PowerfulSample.resources
Tester.PredefinedStylesSample.resources
Tester.Properties.Resources.resources
Tester.ReadOnlyBlocksSample.resources
Tester.SimplestCodeFoldingSample.resources
Tester.SimplestSyntaxHighlightingSample.resources
Tester.SplitSample.resources
Tester.SyntaxHighlightingByXmlDescription.resources
Tester.TooltipSample.resources
Tester.VisibleRangeChangedDelayedSample.resources
TempPE
Properties.Resources.Designer.cs.dll
Release
GenerateResource-ResGen.read.1.tlog
GenerateResource-ResGen.write.1.tlog
Tester.AutocompleteSample.resources
Tester.AutocompleteSample2.resources
Tester.AutoIndentSample.resources
Tester.BookmarksSample.resources
Tester.CustomStyleSample.resources
Tester.DynamicSyntaxHighlighting.resources
Tester.exe
Tester.GifImageDrawingSample.resources
Tester.IMEsample.resources
Tester.JokeSample.resources
Tester.LazyLoadingSample.resources
Tester.LoggerSample.resources
Tester.MainForm.resources
Tester.MarkerToolSample.resources
Tester.PowerfulCSharpEditor.resources
Tester.PowerfulSample.resources
Tester.Properties.Resources.resources
Tester.SimplestCodeFoldingSample.resources
Tester.SimplestSyntaxHighlightingSample.resources
Tester.SplitSample.resources
Tester.SyntaxHighlightingByXmlDescription.resources
Tester.TooltipSample.resources
Tester.VisibleRangeChangedDelayedSample.resources
TempPE
Properties.Resources.Designer.cs.dll
Properties
Settings.settings
Resources
backward0_16x16.png
bookmark--plus.png
box.png
bye.gif
class_libraries.png
edit-padding-top.png
forward_16x16.png
layer--minus.png
layer--plus.png
lightning.png
lol.gif
property.png
redo_16x16.png
rolleyes.gif
sad_16x16.png
smile_16x16.png
undo_16x16.png
unsure.gif
TesterVB
TesterVB.vbproj.user
bin
Debug
FastColoredTextBox.dll
TabStrip.dll
TesterVB.exe
TesterVB.vshost.exe
TesterVB.vshost.exe.manifest
My Project
Application.myapp
Settings.settings
obj
x86
Debug
TesterVB.AutocompleteSample.resources
TesterVB.AutocompleteSample2.resources
TesterVB.AutoIndentSample.resources
TesterVB.BookmarksSample.resources
TesterVB.exe
TesterVB.PowerfulSample.resources
TesterVB.Resources.resources
TesterVB.TesterVB.ConsoleSample.resources
TesterVB.TesterVB.CustomStyleSample.resources
TesterVB.TesterVB.JokeSample.resources
TesterVB.TesterVB.LazyLoadingSample.resources
TesterVB.TesterVB.MainForm.resources
TesterVB.TesterVB.PowerfulCSharpEditor.resources
TesterVB.TesterVB.TooltipSample.resources
TempPE
My Project.Resources.Designer.vb.dll
Resources
99.jpeg
backward0_16x16.png
bookmark--plus.png
box.png
bye.gif
class_libraries.png
edit-padding-top.png
forward_16x16.png
layer--minus.png
layer--plus.png
lightning.png
lol.gif
property.png
redo_16x16.png
rolleyes.gif
sad_16x16.png
smile_16x16.png
undo_16x16.png
unsure.gif
FastColoredTextBoxCF.zip
FastColoredTextBoxCF
FastColoredTextBox
FastColoredTextBox.csproj.user
bin
Release
FastColoredTextBox.dll
FastColoredTextBox.pdb
Properties
Tester
Tester.csproj.user
bin
Release
FastColoredTextBox.dll
FastColoredTextBox.pdb
Tester.exe
Tester.pdb
Properties
FastColoredTextBoxDemo-noexe.zip
FastColoredTextBoxDemo
FastColoredTextBoxDemo.zip
FastColoredTextBox.dll
TabStrip.dll
Tester.exe
fastcoloredtextboxime-noexe.zip
fastcoloredtextboxime.zip
FastColoredTextBox_Help.zip
IronyFCTB-noexe.zip
IronyFCTB
IronyFCTB.suo
ExternalDlls
IronyFCTB
bin
Debug
obj
Debug
Properties
Tester
bin
Debug
obj
x86
Debug
Tester.MainForm.resources
Tester.Properties.Resources.resources
Tester.SimplestSample.resources
Properties
Settings.settings
IronyFCTB.zip
IronyFCTB.suo
FastColoredTextBox.dll
Irony.dll
Irony.Interpreter.dll
Irony.Samples.dll
FastColoredTextBox.dll
Irony.dll
IronyFCTB.dll
IronyFCTB.pdb
DesignTimeResolveAssemblyReferences.cache
DesignTimeResolveAssemblyReferencesInput.cache
IronyFCTB.csprojResolveAssemblyReference.cache
IronyFCTB.dll
IronyFCTB.pdb
FastColoredTextBox.dll
Irony.dll
Irony.Interpreter.dll
Irony.Samples.dll
IronyFCTB.dll
IronyFCTB.pdb
Tester.exe
Tester.pdb
Tester.vshost.exe
DesignTimeResolveAssemblyReferences.cache
DesignTimeResolveAssemblyReferencesInput.cache
Tester.csproj.GenerateResource.Cache
Tester.csprojResolveAssemblyReference.cache
Tester.exe
Tester.MainForm.resources
Tester.pdb
Tester.Properties.Resources.resources
Tester.SimplestSample.resources
Settings.settings
using System.Collections.Generic;

namespace FastColoredTextBoxNS
{
    internal class CommandManager
    {
        readonly int maxHistoryLength = 200;
        LimitedStack<UndoableCommand> history;
        Stack<UndoableCommand> redoStack = new Stack<UndoableCommand>();

        public CommandManager()
        {
            history = new LimitedStack<UndoableCommand>(maxHistoryLength);
        }

        public void ExecuteCommand(Command cmd)
        {
            if (disabledCommands > 0)
                return;

            if (cmd is UndoableCommand)
            {
                (cmd as UndoableCommand).autoUndo = autoUndoCommands > 0;
                history.Push(cmd as UndoableCommand);
            }
            cmd.Execute();
            //
            redoStack.Clear();
        }

        public void Undo()
        {
            if (history.Count > 0)
            {
                var cmd = history.Pop();
                //
                BeginDisableCommands();//prevent text changing into handlers
                try
                {
                    cmd.Undo();
                }
                finally
                {
                    EndDisableCommands();
                }
                //
                redoStack.Push(cmd);
            }

            //undo next autoUndo command
            if (history.Count > 0)
            {
                if (history.Peek().autoUndo)
                    Undo();
            }
        }

        int disabledCommands = 0;

        private void EndDisableCommands()
        {
            disabledCommands--;
        }

        private void BeginDisableCommands()
        {
            disabledCommands++;
        }

        int autoUndoCommands = 0;

        public void EndAutoUndoCommands()
        {
            autoUndoCommands--;
            if (autoUndoCommands == 0)
                if (history.Count > 0)
                    history.Peek().autoUndo = false;
        }

        public void BeginAutoUndoCommands()
        {
            autoUndoCommands++;
        }

        internal void ClearHistory()
        {
            history.Clear();
            redoStack.Clear();
        }

        internal void Redo()
        {
            if (redoStack.Count == 0)
                return;
            UndoableCommand cmd;
            BeginDisableCommands();//prevent text changing into handlers
            try
            {
                cmd = redoStack.Pop();
                cmd.tb.Selection.Start = cmd.sel.Start;
                cmd.tb.Selection.End = cmd.sel.End;
                cmd.Execute();
                history.Push(cmd);
            }
            finally
            {
                EndDisableCommands();
            }

            //redo command after autoUndoable command
            if (cmd.autoUndo)
                Redo();
        }

        public bool UndoEnabled 
        { 
            get
            {
                return history.Count>0;
            }
        }

        public bool RedoEnabled
        {
            get
            {
                return redoStack.Count > 0;
            }
        }
    }

    internal abstract class Command
    {
        internal FastColoredTextBox tb;
        public abstract void Execute();
    }

    internal abstract class UndoableCommand : Command
    {
        internal Range sel;
        internal Range lastSel;
        internal bool autoUndo;

        public UndoableCommand(FastColoredTextBox tb)
        {
            this.tb = tb;
            sel = tb.Selection.Clone();
        }

        public virtual void Undo()
        {
            OnTextChanged(true);
        }

        public override void Execute()
        {
            lastSel = tb.Selection.Clone();
            OnTextChanged(false);
        }

        protected virtual void OnTextChanged(bool invert)
        {
            bool b = sel.Start.iLine < lastSel.Start.iLine;
            if (invert)
            {
                if (b)
                    tb.OnTextChanged(sel.Start.iLine, sel.Start.iLine);
                else
                    tb.OnTextChanged(sel.Start.iLine, lastSel.Start.iLine);
            }
            else
            {
                if (b)
                    tb.OnTextChanged(sel.Start.iLine, lastSel.Start.iLine);
                else
                    tb.OnTextChanged(lastSel.Start.iLine, lastSel.Start.iLine);
            }
        }
    }
}

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License

This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)

About the Author

Pavel Torgashov

Ukraine Ukraine
I am Pavеl Tоrgаshоv, and I live in Kyiv, Ukraine.
I've been developing software since 1998.
Main activities: processing of large volumes of data, statistics, computer vision and graphics.
 
My contact email is p_torgashov[at]ukr.net

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