VSTF.TextBounds?TryGetNormalizedTextBounds(VST.Span lineSpan)
{
if (!IsValid)
{
throw new ObjectDisposedException(nameof(HexFormattedLineImpl));
}
var span = lineExtent.Intersection(lineSpan);
if (span is null)
{
return(null);
}
var startBounds = GetFirstTextBounds(span.Value.Start);
var endBounds = GetLastTextBounds(span.Value.End);
if (span.Value.End > TextSpan.End)
{
endBounds = new VSTF.TextBounds(
endBounds.Trailing + EndOfLineWidth,
endBounds.Top,
0,
endBounds.Height,
endBounds.TextTop,
endBounds.TextHeight);
}
return(new VSTF.TextBounds(startBounds.Left, startBounds.Top, endBounds.Left - startBounds.Left, startBounds.Height, startBounds.TextTop, startBounds.TextHeight));
}
/// <summary>
/// Determines whether two <see cref="TextBounds"/> objects are the same.
/// </summary>
public override bool Equals(object obj)
{
// Check for the obvious
if (obj == null || !(obj is TextBounds))
{
return(false);
}
TextBounds bounds = (TextBounds)obj;
return(bounds == this);
}
IList <VSTF.TextBounds> GetTextBounds(HexViewLine line)
{
if (lineSpan.IsTextSpan)
{
if (lineSpan.TextSpan !.Value.Length == 0)
{
if (line.BufferSpan.Contains(lineSpan.BufferSpan))
{
var bounds = line.GetCharacterBounds(lineSpan.TextSpan.Value.Start);
// It's just a point, so use zero width
bounds = new VSTF.TextBounds(bounds.Leading, bounds.Top, 0, bounds.Height, bounds.TextTop, bounds.TextHeight);
return(new VSTF.TextBounds[] { bounds });
}
return(Array.Empty <VSTF.TextBounds>());
}
else
{
return(line.GetNormalizedTextBounds(lineSpan));
}
}
public Collection <TF.TextBounds> GetNormalizedTextBounds(SnapshotSpan bufferSpan)
{
if (!IsValid)
{
throw new ObjectDisposedException(nameof(WpfTextViewLine));
}
if (bufferSpan.Snapshot != Snapshot)
{
throw new ArgumentException();
}
var span = ExtentIncludingLineBreak.Intersection(bufferSpan);
var list = new List <TF.TextBounds>();
if (span == null)
{
return(new Collection <TF.TextBounds>(list));
}
//TODO: Handle RTL text and adornments
var startBounds = GetFirstTextBounds(span.Value.Start);
var endBounds = GetLastTextBounds(span.Value.End);
if (span.Value.End > End)
{
endBounds = new TF.TextBounds(
endBounds.Trailing + EndOfLineWidth,
endBounds.Top,
0,
endBounds.Height,
endBounds.TextTop,
endBounds.TextHeight);
}
list.Add(new TF.TextBounds(startBounds.Left, startBounds.Top, endBounds.Left - startBounds.Left, startBounds.Height, startBounds.TextTop, startBounds.TextHeight));
return(new Collection <TF.TextBounds>(list));
}
void UpdateAdornmentUIState(HexViewLine line, AdornmentTagInfo adornmentInfo, VSTF.TextBounds bounds)
{
double verticalScale = line.LineTransform.VerticalScale;
adornmentInfo.TopUIElement.SetScale(verticalScale);
Canvas.SetTop(adornmentInfo.TopUIElement, bounds.TextTop + line.Baseline - verticalScale * adornmentInfo.Tag.Baseline);
Canvas.SetLeft(adornmentInfo.TopUIElement, bounds.Left);
}
public Collection<TF.TextBounds> GetNormalizedTextBounds(SnapshotSpan bufferSpan) {
if (!IsValid)
throw new ObjectDisposedException(nameof(WpfTextViewLine));
if (bufferSpan.Snapshot != Snapshot)
throw new ArgumentException();
var span = ExtentIncludingLineBreak.Intersection(bufferSpan);
var list = new List<TF.TextBounds>();
if (span == null)
return new Collection<TF.TextBounds>(list);
var startBounds = GetFirstTextBounds(span.Value.Start);
var endBounds = GetLastTextBounds(span.Value.End);
if (span.Value.End > End) {
endBounds = new TF.TextBounds(
endBounds.Trailing + EndOfLineWidth,
endBounds.Top,
0,
endBounds.Height,
endBounds.TextTop,
endBounds.TextHeight);
}
list.Add(new TF.TextBounds(startBounds.Left, startBounds.Top, endBounds.Left - startBounds.Left, startBounds.Height, startBounds.TextTop, startBounds.TextHeight));
return new Collection<TF.TextBounds>(list);
}
private void InternalMoveCaret(VirtualSnapshotPoint bufferPosition, PositionAffinity caretAffinity, ITextViewLine textLine, bool captureHorizontalPosition, bool captureVerticalPosition, bool raiseEvent)
{
CaretPosition oldPosition = this.Position;
_caretAffinity = caretAffinity;
_insertionPoint = bufferPosition;
_forceVirtualSpace = _insertionPoint.IsInVirtualSpace && !this.IsVirtualSpaceOrBoxSelectionEnabled;
_emptySelection = _wpfTextView.Selection.IsEmpty;
_isContainedByView = (textLine.VisibilityState != VisibilityState.Unattached);
double xCoordinate;
double width;
if (bufferPosition.IsInVirtualSpace || textLine.End == bufferPosition.Position)
{
//Never show overwrite caret when at the physical end of a line.
this.OverwriteMode = false;
}
else
{
//Position is in the interior of the line ... preferred position is based strictly on the bufferPosition.
this.OverwriteMode = _wpfTextView.Options.IsOverwriteModeEnabled() && _emptySelection;
}
// if we're in overwrite mode, draw a rectangle covering the text element, otherwise, just
// draw a thin line
if (_overwriteMode)
{
Microsoft.VisualStudio.Text.Formatting.TextBounds bounds = textLine.GetExtendedCharacterBounds(bufferPosition);
xCoordinate = bounds.Left;
width = bounds.Width;
}
else
{
xCoordinate = GetXCoordinateFromVirtualBufferPosition(textLine, bufferPosition);
width = 10;//TODO: SystemParameters.CaretWidth;
}
_bounds = new SKRect((float)xCoordinate, (float)textLine.TextTop, (float)(xCoordinate + width), (float)textLine.TextBottom);
CapturePreferredPositions(captureHorizontalPosition, captureVerticalPosition);
CaretPosition newPosition = this.Position;
if (newPosition != oldPosition)
{
this.UpdateBlinkTimer();
if (raiseEvent)
{
if (_selection.IsEmpty)
{
//Empty selections are logically located at the caret position, so force a selection changed event to be raised
//before any of the caret position changed events.
_selection.RaiseChangedEvent(emptyBefore: true, emptyAfter: true, moved: true);
}
// Inform this change to interested parties
EventHandler <CaretPositionChangedEventArgs> positionChanged = this.PositionChanged;
if (positionChanged != null)
{
_guardedOperations.RaiseEvent <CaretPositionChangedEventArgs>(this, positionChanged, new CaretPositionChangedEventArgs(_wpfTextView, oldPosition, newPosition));
}
}
}
this.InvalidateVisual();
_updateNeeded = true;
}
IList<VSTF.TextBounds> GetTextBounds(HexViewLine line) {
if (lineSpan.IsTextSpan) {
if (lineSpan.TextSpan.Value.Length == 0) {
if (line.BufferSpan.Contains(lineSpan.BufferSpan)) {
var bounds = line.GetCharacterBounds(lineSpan.TextSpan.Value.Start);
// It's just a point, so use zero width
bounds = new VSTF.TextBounds(bounds.Leading, bounds.Top, 0, bounds.Height, bounds.TextTop, bounds.TextHeight);
return new VSTF.TextBounds[] { bounds };
}
return Array.Empty<VSTF.TextBounds>();
}
else
return line.GetNormalizedTextBounds(lineSpan);
}
else {
var fullSpan = lineSpan.BufferSpan;
if (fullSpan.Length == 0) {
if (line.BufferSpan.Contains(fullSpan))
return line.GetNormalizedTextBounds(fullSpan, lineSpan.SelectionFlags.Value);
return Array.Empty<VSTF.TextBounds>();
}
else
return line.GetNormalizedTextBounds(lineSpan);
}
}
