/// <summary>
/// Initializes a new instance of the <see cref="LinkReferenceTrackerPostProcessor"/> class, and executes the post-processor
/// </summary>
/// <param name="document">The document.</param>
/// <param name="updateSequenceNumber">A number that is increased every time the source document changed.</param>
/// <param name="imageProvider">The image provider. Can be null (in this case nothing is tracked).</param>
public static void TrackLinks(MarkdownDocument document, long updateSequenceNumber, IWpfImageProvider imageProvider)
{
var urlCollector = imageProvider?.CreateUrlCollector();
if (null != urlCollector)
{
foreach (var element in PositionHelper.EnumerateAllMarkdownObjectsRecursively(document))
{
if (element is LinkInline linkInline)
{
if (linkInline.UrlSpan.HasValue)
{
urlCollector.AddUrl(linkInline.IsImage, linkInline.Url, linkInline.UrlSpan.Value.Start, linkInline.UrlSpan.Value.End);
}
}
}
urlCollector.Freeze(); // announce that the collection proccess has finished
imageProvider.UpdateUrlCollector(urlCollector, updateSequenceNumber);
}
}
/// <summary>
/// Gets the start and end line/column positions (1-based) of the selection. If no selection is active, the position of the caret is returned; in this case start and end line/column positions are the same.
/// </summary>
/// <returns>Start and end line/column positions (1-based) of the selection or the caret. If it can not be retrieved, the tuple (0, 0, 0, 0) is returned.</returns>
private (int startline, int startcolumn, int endline, int endcolumn) GetSelectionOrCaret()
{
if (IsViewerSelected)
{
var(sourceStart, isSourceStartAccurate) = PositionHelper.ViewersTextPositionToSourceEditorsTextPosition(_guiViewer.Selection.Start);
var(sourceEnd, isSourceEndAccurate) = PositionHelper.ViewersTextPositionToSourceEditorsTextPosition(_guiViewer.Selection.End);
if (isSourceStartAccurate && isSourceEndAccurate)
{
var startLocation = _guiEditor.Document.GetLocation(sourceStart);
var endLocation = _guiEditor.Document.GetLocation(sourceEnd);
return(startLocation.Line, startLocation.Column, endLocation.Line, endLocation.Column);
}
else
{
return(0, 0, 0, 0);
}
}
else // Editor is selected
{
int selectionStart = 0;
int selectionEnd = 0;
if (_guiEditor.SelectionLength > 0)
{
selectionStart = _guiEditor.SelectionStart;
selectionEnd = _guiEditor.SelectionStart + _guiEditor.SelectionLength;
}
else
{
selectionStart = _guiEditor.CaretOffset;
selectionEnd = _guiEditor.CaretOffset;
}
var startLocation = _guiEditor.Document.GetLocation(selectionStart);
var endLocation = _guiEditor.Document.GetLocation(selectionEnd);
return(startLocation.Line, startLocation.Column, endLocation.Line, endLocation.Column);
}
}
