/// <summary>
/// Insers the content of the document buffer into itself and sub containers.
/// </summary>
/// <param name="documentBuffer">The document buffer.</param>
/// <param name="dimensionConstraint">The constraining dimensions.</param>
public void Insert(IDocumentBuffer documentBuffer, IDimensionConstraint dimensionConstraint)
{
if (dimensionConstraint.MaxWidth == null)
{
throw new Exception("The formatted text object must be given a width constraint on insert.");
}
var textBeforeCursor = Strings.strsubutf8(this.text, 0, this.cursorPos);
var xBeforeCursor = this.textScoper.GetWidth(this.flags.Font, this.flags.FontSize, textBeforeCursor);
var availableDimension = new DimensionConstraint()
{
MaxWidth = (double)dimensionConstraint.MaxWidth - xBeforeCursor,
MaxHeight = dimensionConstraint.MaxHeight,
};
var addedText = documentBuffer.Take(availableDimension, this.GetCurrentFlags());
if (addedText == String.Empty)
{
return;
}
var addedTextSize = Strings.strlenutf8(addedText);
if (this.cursorPos < this.GetLength()) // The cursor is not and the end. The inserted text is thus put in at the cursor position
{
var textAfterCursor = Strings.strsubutf8(this.text, this.cursorPos);
this.text = Strings.strsubutf8(this.text, 0, this.cursorPos);
var bufferEmpty = documentBuffer.EndOfBuffer();
documentBuffer.Append(textAfterCursor, this.GetCurrentFlags());
if (bufferEmpty)
{
availableDimension = new DimensionConstraint()
{
MaxWidth = (double)dimensionConstraint.MaxWidth - this.textScoper.GetWidth(this.flags.Font, this.flags.FontSize, this.text + addedText),
MaxHeight = dimensionConstraint.MaxHeight,
};
addedText += documentBuffer.Take(availableDimension, this.GetCurrentFlags());
}
}
if (this.cursor != null)
{
this.cursorPos += addedTextSize;
this.CursorChanged();
}
this.text += addedText;
this.TextChanged();
}
protected override IElement ProduceChild(IDocumentBuffer documentBuffer, IDimensionConstraint childConstraint)
{
return(documentBuffer.Take(childConstraint));
}