private DoxTokenTag FindSpanTag(System.Windows.Input.MouseEventArgs args)
{
try
{
// find canavas
var over = System.Windows.Input.Mouse.PrimaryDevice.DirectlyOver;
Canvas canvas = over as Canvas;
if (canvas == null)
{
System.Windows.FrameworkElement elem = over as System.Windows.FrameworkElement;
while (elem != null && elem.Parent != null)
{
canvas = elem as Canvas;
if (canvas != null)
{
break;
}
elem = elem.Parent as System.Windows.FrameworkElement;
}
}
if (canvas == null)
{
return(null);
}
// get mouse position relative to canavas
System.Windows.Point pos = args.GetPosition(canvas);
// HitTestResult hitRes = VisualTreeHelper.HitTest(canvas, pos);
// find the line where the mouse hovers
var lines = this.WpfTextView.TextViewLines;
Microsoft.VisualStudio.Text.Formatting.ITextViewLine hitLine = null;
foreach (var line in lines)
{
if (line.Left < pos.X && line.Right > pos.X && line.Top < pos.Y && line.Bottom > pos.Y)
{
hitLine = line;
break;
}
}
if (hitLine == null)
{
return(null);
}
// find the positon in the line where the mouse hovers
SnapshotPoint?snapPt = hitLine.GetBufferPositionFromXCoordinate(pos.X);
if (snapPt == null)
{
return(null);
}
// find doxygen tag
DoxTokenTag spanInfo = DoxTokenTaggerHelper.TagHitTest(this.Aggregator, this.WpfTextView.TextSnapshot, snapPt.Value);
return(spanInfo);
}
catch { }
return(null);
}
/// <summary>
/// Given an IWpfTextView, find the position of the caret and report its column number
/// The column number is 0-based
/// </summary>
/// <param name="textView">The text view containing the caret</param>
/// <returns>The column number of the caret's position. When the caret is at the leftmost column, the return value is zero.</returns>
private static int GetCaretColumn(IWpfTextView textView)
{
// This is the code the editor uses to populate the status bar. Thanks, Jack!
Microsoft.VisualStudio.Text.Formatting.ITextViewLine caretViewLine = textView.Caret.ContainingTextViewLine;
double columnWidth = textView.FormattedLineSource.ColumnWidth;
return((int)(Math.Round((textView.Caret.Left - caretViewLine.Left) / columnWidth)));
}
public Microsoft.VisualStudio.Text.VirtualSnapshotSpan?GetSelectionOnTextViewLine(Microsoft.VisualStudio.Text.Formatting.ITextViewLine line)
{
throw new NotImplementedException();
}
public CaretPosition MoveTo(Microsoft.VisualStudio.Text.Formatting.ITextViewLine textLine, double xCoordinate, bool captureHorizontalPosition)
{
throw new System.NotImplementedException();
}
public CaretPosition MoveTo(Microsoft.VisualStudio.Text.Formatting.ITextViewLine textLine)
{
throw new System.NotImplementedException();
}
