/// <summary>
/// Inserts the snippet into the text area.
/// </summary>
public InsertionContext Insert(TextArea textArea)
{
if (textArea == null)
{
throw new ArgumentNullException(nameof(textArea));
}
var selection = textArea.Selection.SurroundingSegment;
var insertionPosition = textArea.Caret.Offset;
if (selection != null) // if something is selected
// use selection start instead of caret position,
// because caret could be at end of selection or anywhere inside.
// Removal of the selected text causes the caret position to be invalid.
{
insertionPosition = selection.Offset + TextUtilities.GetWhitespaceAfter(textArea.Document, selection.Offset).Length;
}
var context = new InsertionContext(textArea, insertionPosition);
using (context.Document.RunUpdate())
{
if (selection != null)
{
textArea.Document.Remove(insertionPosition, selection.EndOffset - insertionPosition);
}
Insert(context);
context.RaiseInsertionCompleted(EventArgs.Empty);
}
return(context);
}
/// <inheritdoc/>
public override void Insert(InsertionContext context)
{
if (!_setCaretOnlyIfTextIsSelected || !string.IsNullOrEmpty(context.SelectedText))
{
SetCaret(context);
}
}
public BoundActiveElement(InsertionContext context, SnippetReplaceableTextElement targetSnippetElement, SnippetBoundElement boundElement, AnchorSegment segment)
{
_context = context;
_targetSnippetElement = targetSnippetElement;
_boundElement = boundElement;
_segment = segment;
}
/// <inheritdoc/>
public override void Insert(InsertionContext context)
{
foreach (var e in Elements)
{
e.Insert(context);
}
}
/// <inheritdoc/>
public override void Insert(InsertionContext context)
{
var start = context.InsertionPosition;
base.Insert(context);
var end = context.InsertionPosition;
context.RegisterActiveElement(this, new ReplaceableActiveElement(context, start, end));
}
/// <inheritdoc />
public override void Insert(InsertionContext context)
{
var start = context.Document.CreateAnchor(context.InsertionPosition);
start.MovementType = AnchorMovementType.BeforeInsertion;
start.SurviveDeletion = true;
var segment = new AnchorSegment(start, start);
context.RegisterActiveElement(this, new AnchorElement(segment, Name, context));
}
internal static void SetCaret(InsertionContext context)
{
var pos = context.Document.CreateAnchor(context.InsertionPosition);
pos.MovementType = AnchorMovementType.BeforeInsertion;
pos.SurviveDeletion = true;
context.Deactivated += (sender, e) =>
{
if (e.Reason == DeactivateReason.ReturnPressed || e.Reason == DeactivateReason.NoActiveElements)
{
context.TextArea.Caret.Offset = pos.Offset;
}
};
}
/// <inheritdoc/>
public override void Insert(InsertionContext context)
{
if (TargetElement != null)
{
var start = context.Document.CreateAnchor(context.InsertionPosition);
start.MovementType = AnchorMovementType.BeforeInsertion;
start.SurviveDeletion = true;
var inputText = TargetElement.Text;
if (inputText != null)
{
context.InsertText(ConvertText(inputText));
}
var end = context.Document.CreateAnchor(context.InsertionPosition);
end.MovementType = AnchorMovementType.BeforeInsertion;
end.SurviveDeletion = true;
var segment = new AnchorSegment(start, end);
context.RegisterActiveElement(this, new BoundActiveElement(context, TargetElement, this, segment));
}
}
/// <inheritdoc/>
public override void Insert(InsertionContext context)
{
var tabString = new StringBuilder();
for (var i = 0; i < Indentation; i++)
{
tabString.Append(context.Tab);
}
var indent = tabString.ToString();
var text = context.SelectedText.TrimStart(' ', '\t');
text = text.Replace(context.LineTerminator,
context.LineTerminator + indent);
context.Document.Insert(context.InsertionPosition, text);
context.InsertionPosition += text.Length;
if (string.IsNullOrEmpty(context.SelectedText))
{
SnippetCaretElement.SetCaret(context);
}
}
public SnippetInputHandler(InsertionContext context)
: base(context.TextArea)
{
_context = context;
}
public ReplaceableActiveElement(InsertionContext context, int startOffset, int endOffset)
{
_context = context;
_startOffset = startOffset;
_endOffset = endOffset;
}
/// <summary>
/// Creates a new AnchorElement.
/// </summary>
public AnchorElement(AnchorSegment segment, string name, InsertionContext context)
{
_segment = segment;
_context = context;
Name = name;
}