public static List <Paragraph> Flow(TextBox textBox, Win32DCSafeHandle hdc, float dpiX, FontCache fontCache, FlowContext flowContext, bool keepLines, out float height)
{
if (!(flowContext.Height <= 0.0) && !(flowContext.Width <= 0.0))
{
int num = TextBox.ConvertToPixels(flowContext.ContentOffset, dpiX);
int pixels = num;
TextBoxContext context = flowContext.Context;
RPLFormat.Directions direction = textBox.TextBoxProps.Direction;
List <Paragraph> list = new List <Paragraph>();
Win32ObjectSafeHandle win32ObjectSafeHandle = Win32.SelectObject(hdc, Win32ObjectSafeHandle.Zero);
SizeF flowContextSize;
if (textBox.VerticalText)
{
flowContext.VerticalCanGrow = textBox.TextBoxProps.CanGrow;
flowContextSize = new SizeF((float)TextBox.ConvertToPixels(flowContext.Height, dpiX), (float)TextBox.ConvertToPixels(flowContext.Width, dpiX));
}
else
{
flowContextSize = new SizeF((float)TextBox.ConvertToPixels(flowContext.Width, dpiX), (float)TextBox.ConvertToPixels(flowContext.Height, dpiX));
}
fontCache.WritingMode = textBox.TextBoxProps.WritingMode;
try
{
while (context.ParagraphIndex < textBox.Paragraphs.Count)
{
Paragraph paragraph = textBox.Paragraphs[context.ParagraphIndex];
paragraph.OffsetY = num;
bool flag = LineBreaker.FlowParagraph(paragraph, direction, hdc, dpiX, fontCache, flowContext, keepLines, flowContextSize, ref pixels);
num += paragraph.Height;
if (!keepLines)
{
paragraph.TextLines = null;
}
if (!flag)
{
break;
}
list.Add(paragraph);
if ((float)num >= flowContextSize.Height)
{
if (paragraph.AtEndOfParagraph(context))
{
context.IncrementParagraph();
}
break;
}
context.IncrementParagraph();
}
if ((float)num < flowContextSize.Height)
{
flowContext.AtEndOfTextBox = true;
}
}
finally
{
if (!win32ObjectSafeHandle.IsInvalid)
{
Win32ObjectSafeHandle win32ObjectSafeHandle2 = Win32.SelectObject(hdc, win32ObjectSafeHandle);
win32ObjectSafeHandle2.SetHandleAsInvalid();
win32ObjectSafeHandle.SetHandleAsInvalid();
}
}
height = TextBox.ConvertToMillimeters(num, dpiX);
flowContext.ContentOffset = TextBox.ConvertToMillimeters(pixels, dpiX);
return(list);
}
height = 0f;
return(null);
}
