EditableRun MakeTextRun(int sourceIndex, int length)
{
if (length > 0)
{
EditableRun newTextRun = null;
char[] newContent = new char[length];
Array.Copy(_mybuffer, sourceIndex, newContent, 0, length);
newTextRun = new EditableTextRun(this.Root, newContent, this.SpanStyle);
newTextRun.IsLineBreak = this.IsLineBreak;
newTextRun.UpdateRunWidth();
return(newTextRun);
}
else
{
throw new Exception("string must be null or zero length");
}
}
public void AddCharacter(char c)
{
if (CurrentLine.IsBlankLine)
{
//TODO: review here, enable this feature or not
//some char can't be a start char on blank line
if (!InternalTextLayerController.CanCaretStopOnThisChar(c))
{
return;
}
//
//1. new
EditableRun t = new EditableTextRun(this.RootGfx,
c,
this.CurrentSpanStyle);
var owner = this.FlowLayer.OwnerRenderElement;
CurrentLine.AddLast(t);
SetCurrentTextRun(t);
}
else
{
EditableRun cRun = CurrentTextRun;
if (cRun != null)
{
if (cRun.IsInsertable)
{
cRun.InsertAfter(CurrentTextRunCharIndex, c);
}
else
{
AddTextSpan(new EditableTextRun(this.RootGfx, c, this.CurrentSpanStyle));
return;
}
}
else
{
throw new NotSupportedException();
}
}
CurrentLine.TextLineReCalculateActualLineSize();
CurrentLine.RefreshInlineArrange();
SetCurrentCharStepRight();
}
public void SplitToNewLine()
{
EditableRun lineBreakRun = new EditableTextRun(this.RootGfx, '\n', this.CurrentSpanStyle);
EditableRun currentRun = CurrentTextRun;
if (CurrentLine.IsBlankLine)
{
CurrentLine.AddLast(lineBreakRun);
}
else
{
if (CharIndex == -1)
{
CurrentLine.AddFirst(lineBreakRun);
SetCurrentTextRun(null);
}
else
{
EditableRun rightSplitedPart = EditableRun.InnerRemove(currentRun,
CurrentTextRunCharIndex + 1, true);
if (rightSplitedPart != null)
{
CurrentLine.AddAfter(currentRun, rightSplitedPart);
}
CurrentLine.AddAfter(currentRun, lineBreakRun);
if (currentRun.CharacterCount == 0)
{
CurrentLine.Remove(currentRun);
}
}
}
this.TextLayer.TopDownReCalculateContentSize();
EnsureCurrentTextRun();
}
public static void UnsafeGetRawCharBuffer(EditableTextRun textRun, out char[] rawCharBuffer)
{
rawCharBuffer = textRun._mybuffer;
}