LayoutFarm.Text.EditableTextLine.Remove C# (CSharp) Method

        public new void Remove(EditableRun v)
        {
#if DEBUG
            if (v.IsLineBreak)
            {
                throw new NotSupportedException("not support line break");
            }
#endif


            base.Remove(GetLineLinkedNode(v));
            EditableRun.RemoveParentLink(v);
            if ((this.lineFlags & LOCAL_SUSPEND_LINE_REARRANGE) != 0)
            {
                return;
            }

            if (!this.EndWithLineBreak && this.Count == 0 && this.currentLineNumber > 0)
            {
                if (!editableFlowLayer.GetTextLine(currentLineNumber - 1).EndWithLineBreak)
                {
                    editableFlowLayer.Remove(currentLineNumber);
                }
            }
            else
            {
                //var ownerVe = editableFlowLayer.OwnerRenderElement;
                //if (ownerVe != null)
                //{
                //    RenderElement.InnerInvalidateLayoutAndStartBubbleUp(ownerVe);
                //}
                //else
                //{
                //    throw new NotSupportedException();
                //}
            }
        }
    }

        internal EditableVisualPointInfo[] Split(VisualSelectionRange selectionRange)
        {
            selectionRange.SwapIfUnOrder();
            EditableVisualPointInfo startPoint = selectionRange.StartPoint;
            EditableVisualPointInfo endPoint   = selectionRange.EndPoint;

            if (startPoint.TextRun == endPoint.TextRun)
            {
                EditableRun             toBeCutTextRun         = startPoint.TextRun;
                EditableRun             preCutTextRun          = (EditableRun)toBeCutTextRun.LeftCopy(startPoint.RunLocalSelectedIndex);
                EditableRun             middleCutTextRun       = (EditableRun)toBeCutTextRun.Copy(startPoint.RunLocalSelectedIndex + 1, endPoint.LineCharIndex - startPoint.LineCharIndex);
                EditableRun             postCutTextRun         = (EditableRun)toBeCutTextRun.Copy(endPoint.RunLocalSelectedIndex + 1);
                EditableVisualPointInfo newStartRangePointInfo = null;
                EditableVisualPointInfo newEndRangePointInfo   = null;
                EditableTextLine        line = this;
                if (startPoint.LineId != currentLineNumber)
                {
                    line = editableFlowLayer.GetTextLine(startPoint.LineId);
                }
                line.LocalSuspendLineReArrange();
                if (preCutTextRun != null)
                {
                    line.AddBefore(toBeCutTextRun, preCutTextRun);
                    newStartRangePointInfo = CreateTextPointInfo(
                        startPoint.LineId, startPoint.LineCharIndex, startPoint.X,
                        preCutTextRun, startPoint.TextRunCharOffset, startPoint.TextRunPixelOffset);
                }
                else
                {
                    EditableRun prevTxtRun = GetPrevTextRun((EditableRun)startPoint.TextRun);
                    if (prevTxtRun != null)
                    {
                        newStartRangePointInfo = CreateTextPointInfo(
                            startPoint.LineId, startPoint.LineCharIndex, startPoint.X, prevTxtRun, startPoint.TextRunCharOffset - preCutTextRun.CharacterCount,
                            startPoint.TextRunPixelOffset - prevTxtRun.Width);
                    }
                    else
                    {
                        newStartRangePointInfo = CreateTextPointInfo(
                            startPoint.LineId,
                            startPoint.LineCharIndex,
                            0,
                            null,
                            0, 0);
                    }
                }

                if (postCutTextRun != null)
                {
                    line.AddAfter(toBeCutTextRun, postCutTextRun);
                    newEndRangePointInfo =
                        CreateTextPointInfo(
                            endPoint.LineId,
                            endPoint.LineCharIndex,
                            endPoint.X,
                            middleCutTextRun,
                            startPoint.TextRunCharOffset + middleCutTextRun.CharacterCount,
                            startPoint.TextRunPixelOffset + middleCutTextRun.Width);
                }
                else
                {
                    EditableRun nextTxtRun = GetNextTextRun((EditableRun)endPoint.TextRun);
                    if (nextTxtRun != null)
                    {
                        newEndRangePointInfo = CreateTextPointInfo(
                            endPoint.LineId,
                            endPoint.LineCharIndex,
                            endPoint.X,
                            nextTxtRun,
                            endPoint.TextRunPixelOffset + endPoint.TextRun.CharacterCount,
                            endPoint.TextRunPixelOffset + endPoint.TextRun.Width);
                    }
                    else
                    {
                        newEndRangePointInfo = CreateTextPointInfo(
                            endPoint.LineId,
                            endPoint.LineCharIndex,
                            endPoint.X,
                            middleCutTextRun,
                            endPoint.TextRunCharOffset,
                            endPoint.TextRunPixelOffset);
                    }
                }

                if (middleCutTextRun != null)
                {
                    line.AddAfter(toBeCutTextRun, middleCutTextRun);
                }
                else
                {
                    throw new NotSupportedException();
                }
                line.Remove(toBeCutTextRun);
                line.LocalResumeLineReArrange();
                return(new EditableVisualPointInfo[] { newStartRangePointInfo, newEndRangePointInfo });
            }
            else
            {
                EditableTextLine workingLine = this;
                if (startPoint.LineId != currentLineNumber)
                {
                    workingLine = editableFlowLayer.GetTextLine(startPoint.LineId);
                }
                EditableVisualPointInfo newStartPoint = workingLine.Split(startPoint);
                workingLine = this;
                if (endPoint.LineId != currentLineNumber)
                {
                    workingLine = editableFlowLayer.GetTextLine(endPoint.LineId);
                }
                EditableVisualPointInfo newEndPoint = workingLine.Split(endPoint);
                return(new EditableVisualPointInfo[] { newStartPoint, newEndPoint });
            }
        }