private ActiveNode TryBreakHere(
IParagraphModel <TLine, TState> paragraph, IFrameModel frame,
IBreakPoint breakPoint, ActiveNode prevNode,
out bool doDeactivate)
{
var nextLineNumber = prevNode.LineNumber + 1;
var suitableLength = frame.LengthOf(nextLineNumber);
var constraint = new LineConstraint {
SuitableLength = suitableLength
};
var newStyle = new TState();
var line = paragraph.CreateLine(constraint, prevNode.Point, breakPoint, prevNode.Style, out newStyle);
double ratio = _evaluator.ComputeAdjustmentRatio(line, suitableLength);
doDeactivate = (ratio < -1 || _evaluator.IsForcedBreakPoint(breakPoint));
if (-1 <= ratio && ratio <= _tolerance)
{
var fitnessClass = _evaluator.ComputeFitnessClass(ratio);
var prevIsFlagged = prevNode.Point.IsFlagged;
var prevFitnessClass = prevNode.FitnessClass;
var demerits = _evaluator.ComputeDemerits(breakPoint, ratio, fitnessClass, prevIsFlagged, prevFitnessClass);
return(ActiveNode.CreateBreakNode(breakPoint, line, fitnessClass, newStyle, ratio, demerits, prevNode));
}
else
{
return(null);
}
}
private static IUnjustifiedLine <TLine> ForceLayoutInOneLine(IParagraphModel <TLine, TState> paragraph, IFrameModel frame)
{
var length = frame.LengthOf(1);
var constraint = new LineConstraint {
SuitableLength = length
};
var style = new TState();
var ignore = new TState();
var unjustifiedLine = paragraph.CreateLine(constraint, paragraph.StartPoint, paragraph.EndPoint, style, out ignore);
return(unjustifiedLine);
}