LayoutFarm.Text.EditableTextFlowLayer.PerformHorizontalFlowArrangeForMultilineText C# (CSharp) Method

        void PerformHorizontalFlowArrangeForMultilineText(
            int ownerClientLeft, int ownerClientWidth,
            int ownerClientTop)
        {
#if DEBUG
            long startTick = DateTime.Now.Ticks;
#endif

            List<EditableTextLine> lines = (List<EditableTextLine>)this.lineCollection;
            int ownerClientRight = ownerClientLeft + ownerClientWidth;
            int curX = 0;
            int curY = 0;
            bool lastestIsBlock = false;
            int maxWidth = 0;
            int curY_fromTop = ownerClientTop;
            int maxHeightInRow = EditableTextLine.DEFAULT_LINE_HEIGHT;
            int lineCount = lines.Count;
            for (int i = 0; i < lineCount; ++i)
            {
                EditableTextLine line = lines[i];
                curX = ownerClientLeft;
                lastestIsBlock = false;
                line.SetTop(curY_fromTop);
                if (!line.NeedArrange)
                {
                    maxHeightInRow = line.ActualLineHeight;
                    if (line.ActualLineWidth > maxWidth)
                    {
                        maxWidth = line.ActualLineWidth;
                    }
                }
                else
                {
                    maxHeightInRow = EditableTextLine.DEFAULT_LINE_HEIGHT;
                    EditableTextLine newLine = null;
                    line.ValidateContentArrangement();
                    bool isFirstRunInThisLine = true;
                    foreach (EditableRun currentRun in line)
                    {
#if DEBUG
                        vinv_dbug_BeginSetElementBound(currentRun);
#endif
                        int v_desired_width = currentRun.Width;
                        int v_desired_height = currentRun.Height;
                        if (isFirstRunInThisLine)
                        {
                            lastestIsBlock = currentRun.IsBlockElement;
                            if (v_desired_height > maxHeightInRow)
                            {
                                maxHeightInRow = v_desired_height;
                            }
                            EditableRun.DirectSetLocation(currentRun, curX, 0);
                            if (v_desired_height > maxHeightInRow)
                            {
                                maxHeightInRow = v_desired_height;
                            }
                            if (lastestIsBlock)
                            {
                                v_desired_width = ownerClientWidth;
                            }

                            EditableRun.DirectSetSize(currentRun,
                                    v_desired_width, v_desired_height);
                            currentRun.MarkValidContentArrangement();
                            curX += v_desired_width;
                            isFirstRunInThisLine = false;
                        }
                        else
                        {
                            if (lastestIsBlock || currentRun.IsBlockElement ||
                            (curX + v_desired_width > ownerClientRight))
                            {
                                newLine = new EditableTextLine(this);
                                newLine.AddLast(currentRun);
                                curY = curY_fromTop + maxHeightInRow;
                                curY_fromTop = curY;
                                maxHeightInRow = EditableTextLine.DEFAULT_LINE_HEIGHT;
                                EditableRun nextR = currentRun.NextTextRun;
                                while (nextR != null)
                                {
                                    line.UnsafeRemoveVisualElement(nextR);
                                    newLine.AddLast(nextR);
                                    nextR = nextR.NextTextRun;
                                }
                                if (i + 1 == lineCount)
                                {
                                    lines.Add(newLine);
                                }
                                else
                                {
                                    lines.Insert(i + 1, newLine);
                                }
                                lineCount++;
                                break;
                            }
                            else
                            {
                                lastestIsBlock = currentRun.IsBlockElement;
                                if (v_desired_height > maxHeightInRow)
                                {
                                    maxHeightInRow = v_desired_height;
                                }
                                EditableRun.DirectSetLocation(currentRun, curX, 0);
                                EditableRun.DirectSetSize(currentRun,
                                       v_desired_width, v_desired_height);
                                currentRun.MarkValidContentArrangement();
                                curX += v_desired_width;
                            }
                        }

#if DEBUG
                        vinv_dbug_EndSetElementBound(currentRun);
#endif

                    }
                    if (curX > maxWidth)
                    {
                        maxWidth = curX;
                    }
                }
                line.SetPostArrangeLineSize(maxWidth, maxHeightInRow);
                curY = curY_fromTop + maxHeightInRow;
                curY_fromTop = curY;
            }

            ValidateArrangement();
        }