public void NewLineCommand_AddNewLine()
{
NewLineCommand command = new NewLineCommand(0, 0);
command.Execute(this.document);
Assert.AreEqual(5, this.document.Lines.Count);
Assert.AreEqual("", this.document.Lines[0]);
Assert.AreEqual(this.initialDocument.Lines[0], this.document.Lines[1]);
command.Undo();
Assert.AreEqual(this.initialDocument.Text, this.document.Text);
command = new NewLineCommand(0, 2);
command.Execute(this.document);
Assert.AreEqual(5, this.document.Lines.Count);
Assert.AreEqual("he", this.document.Lines[0]);
Assert.AreEqual("llo", this.document.Lines[1]);
command.Undo();
Assert.AreEqual(this.initialDocument.Text, this.document.Text);
command = new NewLineCommand(0, 5);
command.Execute(this.document);
Assert.AreEqual(5, this.document.Lines.Count);
Assert.AreEqual("hello", this.document.Lines[0]);
Assert.AreEqual("", this.document.Lines[1]);
command.Undo();
Assert.AreEqual(this.initialDocument.Text, this.document.Text);
command = new NewLineCommand(0, 6);
command.Execute(this.document);
Assert.AreEqual(5, this.document.Lines.Count);
Assert.AreEqual("", this.document.Lines[1]);
Assert.AreEqual("world", this.document.Lines[2]);
command.Undo();
Assert.AreEqual(this.initialDocument.Text, this.document.Text);
command = new NewLineCommand(0, 11);
command.Execute(this.document);
Assert.AreEqual(5, this.document.Lines.Count);
Assert.AreEqual("", this.document.Lines[2]);
Assert.AreEqual("", this.document.Lines[3]);
command.Undo();
Assert.AreEqual(this.initialDocument.Text, this.document.Text);
command = new NewLineCommand(0, this.document.Text.Length);
command.Execute(this.document);
Assert.AreEqual(5, this.document.Lines.Count);
Assert.AreEqual("123", this.document.Lines[3]);
Assert.AreEqual("", this.document.Lines[4]);
command.Undo();
Assert.AreEqual(this.initialDocument.Text, this.document.Text);
}
/// <summary>
/// Handles KeyDown.
/// </summary>
/// <param name="e">Key event arguments.</param>
protected override void OnPreviewKeyDown(KeyEventArgs e)
{
if (e == null)
{
return;
}
else if (this.Document == null)
{
e.Handled = true;
return;
}
char pressedChar = e.Key.GetChar();
// CTRL + Z
if (e.Key == Key.Z && Keyboard.Modifiers == ModifierKeys.Control)
{
this.lastCarretIndex = this.CaretIndex - this.document.CaretPositionInLineByIndex(this.CaretIndex);
this.commandManager.Undo();
this.UpdateUi();
e.Handled = true;
}
// Backspace
else if (e.Key == Key.Back)
{
RemoveRangeCommand removeCommand;
if (this.SelectionLength > 0)
{
this.lastCarretIndex = this.SelectionStart;
removeCommand = new RemoveRangeCommand(this.SelectionStart, this.SelectionLength);
}
else
{
if (this.CaretIndex == 0)
{
return;
}
this.lastCarretIndex = this.CaretIndex - 1;
removeCommand = new RemoveRangeCommand(this.CaretIndex - 1, 1);
}
this.RunCommand(removeCommand);
e.Handled = true;
}
// Tab
else if (e.Key == Key.Tab)
{
this.lastCarretIndex = this.CaretIndex + 2;
InsertStringCommand insertCommand = new InsertStringCommand(" ", this.CaretIndex);
this.RunCommand(insertCommand);
e.Handled = true;
}
// Enter
else if (e.Key == Key.Return)
{
int line = this.document.LineNumberByIndex(this.CaretIndex);
if (line == -1)
{
line = 0;
this.document.AddLine(string.Empty);
}
string paragraph = this.document.AllLines[line];
int spaceCount = 0;
while (spaceCount < paragraph.Length && paragraph[spaceCount] == ' ')
{
spaceCount++;
}
NewLineCommand newLineCommand = new NewLineCommand(spaceCount, this.CaretIndex);
this.lastCarretIndex = this.CaretIndex + 1 + spaceCount;
this.RunCommand(newLineCommand);
e.Handled = true;
}
// Ctrl+V
else if (e.Key == Key.V && Keyboard.Modifiers == ModifierKeys.Control)
{
string clipboardText = Clipboard.GetText();
List<string> clipboardLines = clipboardText.Split('\n').Select(l => l.Replace("\r", string.Empty)).ToList();
this.lastCarretIndex += clipboardText.Length;
InsertLinesCommand command = new InsertLinesCommand(clipboardLines, this.CaretIndex);
this.RunCommand(command);
}
// Some symbol
else if ((!char.IsControl(pressedChar) && !pressedChar.Equals(' ')) || e.Key == Key.Space)
{
this.lastCarretIndex = this.CaretIndex + 1;
InsertStringCommand insertCommand = new InsertStringCommand(e.Key.GetChar().ToString(), this.CaretIndex);
this.RunCommand(insertCommand);
// Autocompletion analyzing
string currentWord = this.document.GetWordByCaretIndex(this.CaretIndex);
List<string> snippetsNames = SnippetLibrary.Names.Where(s => s.StartsWith(currentWord)).ToList();
if (snippetsNames.Count > 0)
{
this.OnLibraryWordEntered(
new LibraryWordEnteredEventArgs(snippetsNames, this.GetRectFromCharacterIndex(this.CaretIndex)));
}
e.Handled = true;
}
base.OnPreviewKeyDown(e);
}
public void NewLineCommand_AddNewLine_WrongCaretIndex()
{
NewLineCommand command = new NewLineCommand(0, this.document.Text.Length + 1);
command.Execute(this.document);
}
