public Paragraph(int index, float maxWidth)
{
Index = index;
Top = index;
BreakWidth = maxWidth;
m_Glyphs = new GlyphList();
m_Breaks = new BreakList();
}
public void WordWrap(float breakWidth)
{
// ToDo: Still not perfect:
// * Lines with ending NewLine may hang over
// (the non-printable NewLine character is right above breakwidth)
// * Lines without any break-chars may hang one character over breakwidth
lock (SyncObject) {
if (!NeedsWordWrap && BreakWidth == breakWidth)
{
return;
}
BreakWidth = breakWidth;
NeedsWordWrap = false;
// Since here, we completely work with temporary local variables
// and set final values once finished.
GlyphList.Node curr = Glyphs.Head;
GlyphList.Node prev = curr;
BreakList lineBreaks = new BreakList();
float currentWidth = 0;
float totalWidth = 0;
float maxWidth = 0;
int pos = 0;
int prevBreakCharPos = 0;
while (curr != null)
{
currentWidth += curr.Value.Width;
totalWidth += currentWidth;
if (currentWidth > BreakWidth && curr.Next != null)
{
if (prevBreakCharPos == 0)
{
lineBreaks.AddLast(pos);
currentWidth = curr.Value.Width;
prev = curr;
}
else
{
lineBreaks.AddLast(prevBreakCharPos);
prevBreakCharPos = 0;
currentWidth = 0;
while (prev != curr)
{
currentWidth += prev.Value.Width;
prev = prev.Next;
}
}
}
else if (IsSpaceWrapCharacter(curr.Value.Char) || (IsWrapCharacter(curr.Value.Char) && curr.Next != null && !IsSpaceWrapCharacter(curr.Next.Value.Char)))
{
prevBreakCharPos = pos + 1;
prev = curr;
}
maxWidth = Math.Max(maxWidth, currentWidth);
curr = curr.Next;
pos++;
}
// Update final values
Concurrency.LockFreeUpdate(ref m_Breaks, lineBreaks);
Width = maxWidth.Ceil();
TotalGlyphWidth = totalWidth;
}
}
