public void EndPoint()
{
var textBuffer = CreateTextBuffer("cat");
var point = new SnapshotCodePoint(textBuffer.GetEndPoint());
Assert.False(point.IsCharacter('c'));
}
public void AddPastEnd()
{
var textBuffer = CreateTextBuffer("A𠈓C");
var point = new SnapshotCodePoint(textBuffer.GetStartPoint());
Assert.Throws <ArgumentOutOfRangeException>(() => point.Add(4));
}
public void Simple()
{
var textBuffer = CreateTextBuffer("cat");
var point = new SnapshotCodePoint(textBuffer.GetStartPoint());
Assert.True(point.IsCharacter('c'));
Assert.False(point.IsCharacter('\t'));
}
public void AddAcrossLines()
{
var textBuffer = CreateTextBuffer("cat", "dog");
var point1 = new SnapshotCodePoint(textBuffer.GetStartPoint());
var point2 = point1.Add(5);
Assert.Equal(1, point2.Line.LineNumber);
}
public void SubtractAcrossLines()
{
var textBuffer = CreateTextBuffer("cat", "dog");
var point1 = new SnapshotCodePoint(textBuffer.GetPointInLine(line: 1, column: 0));
var point2 = point1.Subtract(2);
Assert.Equal(0, point2.Line.LineNumber);
}
public void SubtractSimple()
{
var textBuffer = CreateTextBuffer("A𠈓C");
var point = new SnapshotCodePoint(textBuffer.GetEndPoint());
AssertIt(point.Subtract(1), codePointInfo: CodePointInfo.SimpleCharacter, text: "C", position: 3);
AssertIt(point.Subtract(2), codePointInfo: CodePointInfo.SurrogatePairHighCharacter, text: "𠈓", position: 1);
AssertIt(point.Subtract(3), codePointInfo: CodePointInfo.SimpleCharacter, text: "A", position: 0);
}
public void EndPoint()
{
var textBuffer = CreateTextBuffer("cat");
var point = new SnapshotCodePoint(textBuffer.GetEndPoint());
Assert.Equal(textBuffer.GetEndPoint(), point.StartPoint);
Assert.Equal(textBuffer.GetEndPoint(), point.EndPoint);
Assert.True(point.IsEndPoint);
}
/// <summary>
/// Calculate the dimensions of the caret
/// </summary>
private Size CalculateCaretSize(out string caretCharacter)
{
caretCharacter = "";
var defaultWidth = _formattedText.Width;
var width = defaultWidth;
var height = _textView.LineHeight;
if (IsRealCaretVisible)
{
// Get the caret string and caret width.
var line = TextViewLineContainingCaret;
height = line.Height;
var point = _textView.Caret.Position.BufferPosition;
var codePointInfo = new SnapshotCodePoint(point).CodePointInfo;
if (point.Position < point.Snapshot.Length)
{
var pointCharacter = point.GetChar();
if (_controlCharUtil.TryGetDisplayText(pointCharacter, out string caretString))
{
// Handle control character notation.
caretCharacter = caretString;
width = line.GetCharacterBounds(point).Width;
}
else if (codePointInfo == CodePointInfo.SurrogatePairHighCharacter)
{
// Handle surrogate pairs.
caretCharacter = new SnapshotSpan(point, 2).GetText();
width = line.GetCharacterBounds(point).Width;
}
else if (pointCharacter == '\t')
{
// Handle tab as no character and default width,
// except no wider than the tab's screen width.
caretCharacter = "";
width = Math.Min(defaultWidth, line.GetCharacterBounds(point).Width);
}
else if (pointCharacter == '\r' || pointCharacter == '\n')
{
// Handle linebreak.
caretCharacter = "";
width = line.GetCharacterBounds(point).Width;
}
else
{
// Handle ordinary UTF16 character.
caretCharacter = pointCharacter.ToString();
width = line.GetCharacterBounds(point).Width;
}
}
}
return(new Size(width, height));
}
public void SubtractKeepsLineReference()
{
var textBuffer = CreateTextBuffer("cat", "dog");
var point = new SnapshotCodePoint(textBuffer.GetStartPoint().GetContainingLine(), 4);
var line = point.Line;
while (point.StartPosition > 0)
{
point = point.Subtract(1);
Assert.Same(line, point.Line);
}
}
public void AddKeepsLineReference()
{
var textBuffer = CreateTextBuffer("cat", "dog");
var point = new SnapshotCodePoint(textBuffer.GetStartPoint());
var line = point.Line;
for (int i = 0; i < 3; i++)
{
point = point.Add(1);
Assert.Same(line, point.Line);
}
}
private static void AssertIt(SnapshotCodePoint point, int?codePoint = null, CodePointInfo codePointInfo = null, string text = null, int?position = null)
{
if (codePoint.HasValue)
{
Assert.Equal(codePoint.Value, point.CodePoint);
}
if (codePointInfo != null)
{
Assert.Equal(codePointInfo, point.CodePointInfo);
}
if (text != null)
{
Assert.Equal(text, point.GetText());
}
if (position != null)
{
Assert.Equal(position.Value, point.StartPoint.Position);
}
}
/// <summary>
/// Calculate the dimensions of the caret
/// </summary>
private Size CalculateCaretSize(VirtualSnapshotPoint caretPoint, out string caretCharacter)
{
caretCharacter = "";
var defaultWidth = _formattedText.Width;
var width = defaultWidth;
var height = _textView.LineHeight;
if (IsRealCaretVisible(caretPoint, out var textViewLine))
{
// Get the caret height.
height = textViewLine.TextHeight;
// Try to use the same line height that a selection would use.
var textViewLines = _textView.TextViewLines;
if (textViewLines != null && textViewLines.IsValid)
{
var geometry = textViewLines.GetMarkerGeometry(textViewLine.Extent);
if (geometry != null)
{
height = geometry.Bounds.Height;
}
}
// Get the caret string and caret width.
var point = caretPoint.Position;
var codePointInfo = new SnapshotCodePoint(point).CodePointInfo;
if (point.Position < point.Snapshot.Length)
{
var pointCharacter = point.GetChar();
if (_controlCharUtil.TryGetDisplayText(pointCharacter, out string caretString))
{
// Handle control character notation.
caretCharacter = caretString;
width = textViewLine.GetCharacterBounds(point).Width;
}
else if (codePointInfo == CodePointInfo.SurrogatePairHighCharacter)
{
// Handle surrogate pairs.
caretCharacter = new SnapshotSpan(point, 2).GetText();
width = textViewLine.GetCharacterBounds(point).Width;
}
else if (pointCharacter == '\t')
{
// Handle tab as no character and default width,
// except no wider than the tab's screen width.
caretCharacter = "";
width = Math.Min(defaultWidth, textViewLine.GetCharacterBounds(point).Width);
}
else if (pointCharacter == '\r' || pointCharacter == '\n')
{
// Handle linebreak.
caretCharacter = "";
width = textViewLine.GetCharacterBounds(point).Width;
}
else
{
// Handle ordinary UTF16 character.
caretCharacter = pointCharacter.ToString();
width = textViewLine.GetCharacterBounds(point).Width;
}
}
}
return(new Size(width, height));
}
