public LineBreaker(Renderer.RendererBase renderer, Font defaultFont)
: base(renderer, defaultFont)
{
m_Formatter = new LeftFormatter(renderer, defaultFont);
}
private List <TextBlock> DoLineBreak(Paragraph paragraph, Formatter formatter, int width, int tolerance)
{
m_Paragraph = paragraph;
m_TotalWidth = width;
m_Tolerance = tolerance;
m_Nodes = formatter.FormatParagraph(paragraph);
m_Sum = new Sum(0, 0, 0);
m_ActiveNodes.Clear();
m_ActiveNodes.AddLast(new BreakPoint(0, 0, 0, 0, 0, new Sum(0, 0, 0), null));
for (int index = 0; index < m_Nodes.Count; index++)
{
Node node = m_Nodes[index];
if (node.Type == NodeType.Box)
{
m_Sum.Width += node.Width;
}
else if (node.Type == NodeType.Glue)
{
if (index > 0 && m_Nodes[index - 1].Type == NodeType.Box)
{
MainLoop(index);
}
m_Sum.Width += node.Width;
m_Sum.Stretch += ((GlueNode)node).Stretch;
m_Sum.Shrink += ((GlueNode)node).Shrink;
}
else if (node.Type == NodeType.Penalty && ((PenaltyNode)node).Penalty != Infinity)
{
MainLoop(index);
}
}
if (m_ActiveNodes.Count != 0)
{
LinkedListNode <BreakPoint> node = m_ActiveNodes.First;
LinkedListNode <BreakPoint> tmp = null;
while (node != null)
{
if (tmp == null || node.Value.Demerits < tmp.Value.Demerits)
{
tmp = node;
}
node = node.Next;
}
List <Break> breaks = new List <Break>();
while (tmp != null)
{
breaks.Add(new Break(tmp.Value.Position, tmp.Value.Ratio));
tmp = tmp.Value.Previous;
}
// breaks.Reverse();
int lineStart = 0;
int y = 0;
int x = 0;
StringBuilder str = new StringBuilder(1000);
List <TextBlock> textBlocks = new List <TextBlock>();
for (int i = breaks.Count - 2; i >= 0; i--)
{
int position = breaks[i].Position;
float r = breaks[i].Ratio;
for (int j = lineStart; j < m_Nodes.Count; j++)
{
if (m_Nodes[j].Type == NodeType.Box || (m_Nodes[j].Type == NodeType.Penalty && ((PenaltyNode)m_Nodes[j]).Penalty == -Infinity))
{
lineStart = j;
break;
}
}
int height = 0;
int baseline = 0;
for (int nodeIndex = lineStart; nodeIndex <= position; nodeIndex++)
{
if (m_Nodes[nodeIndex].Type == NodeType.Box)
{
height = Math.Max(height, ((BoxNode)m_Nodes[nodeIndex]).Height);
baseline = Math.Max(baseline, (int)((TextPart)((BoxNode)m_Nodes[nodeIndex]).Part).Font.FontMetrics.Baseline);
}
}
Part part = ((BoxNode)m_Nodes[lineStart]).Part;
int blockStart = lineStart;
for (int nodeIndex = lineStart; nodeIndex <= position; nodeIndex++)
{
if ((m_Nodes[nodeIndex].Type == NodeType.Box && ((BoxNode)m_Nodes[nodeIndex]).Part != part) || nodeIndex == position)
{
TextBlock textBlock = new TextBlock();
textBlock.Part = part;
str.Clear();
for (int k = blockStart; k < (nodeIndex - 1); k++)
{
if (m_Nodes[k].Type == NodeType.Glue)
{
if (m_Nodes[k].Width > 0)
{
str.Append(' ');
}
}
else if (m_Nodes[k].Type == NodeType.Box)
{
str.Append(((BoxNode)m_Nodes[k]).Value);
}
}
textBlock.Position = new Point(x, y + baseline - (int)((TextPart)part).Font.FontMetrics.Baseline);
textBlock.Text = str.ToString();
textBlock.Size = new Size(formatter.MeasureText(((TextPart)part).Font, textBlock.Text).Width, height);
x += textBlock.Size.Width;
textBlocks.Add(textBlock);
if (m_Nodes[nodeIndex].Type == NodeType.Box)
{
part = ((BoxNode)m_Nodes[nodeIndex]).Part;
}
blockStart = nodeIndex;
}
}
x = 0;
y += height;
lineStart = position;
}
return(textBlocks);
}
return(null);
}