public virtual Waypoint PeekNextWaypoint()
{
if (_waypoints == null || _waypoints.Count == 0)
{
return(null);
}
return(_waypoints.Peek());
}
public void Arrange(Document document)
{
var pageSize = document.Variables["page"]["size"].GetValue <Size>();
var margin = document.Variables["page"]["margin"].GetValue <Thickness>();
var boxSize = pageSize;
boxSize.Height -= margin.Height;
boxSize.Width -= margin.Width;
var startOffset = new Position(margin.Left, margin.Top);
var contentArea = new Rectangle(startOffset, boxSize);
var curPage = AddPage(document, pageSize, contentArea);
double curHeight = boxSize.Height;
var flexQueue = new FlexQueue <Measurement>(); //new Queue<Measurement>();
var enqueueNext = false;
// Stage one:
// Add measurements to pages
foreach (var measurement in document.Measurements)
{
if (enqueueNext)
{
flexQueue.Enqueue(measurement, measurement.Flexible);
enqueueNext = measurement.PagebreakPenalty > 0;
}
else if (measurement.PagebreakPenalty > 0)
{
flexQueue.Enqueue(measurement.Flexible);
flexQueue.Enqueue(measurement, measurement.Flexible);
enqueueNext = true;
}
else
{
while (flexQueue.Count > 0)
{
var peeked = flexQueue.Peek();
if (FitAll(peeked, curHeight))
{
foreach (var ms in peeked)
{
TryFitMeasurement(curPage, ms, flexQueue, true, ref curHeight);
}
flexQueue.Dequeue();
}
else if (!flexQueue.IsFlex)
{
curHeight = boxSize.Height;
curPage.Filled = true;
curPage = AddPage(document, pageSize, contentArea);
}
else
{
break;
}
}
if (TryFitMeasurement(curPage, measurement, flexQueue, false, ref curHeight) == FitResult.AddPage)
{
curHeight = boxSize.Height;
curPage.Filled = true;
curPage = AddPage(document, pageSize, contentArea);
}
}
}
// Add leftover flexible items
while (flexQueue.Count > 0)
{
var ms = flexQueue.Dequeue();
foreach (var m in ms)
{
m.Flexible = false;
if (TryFitMeasurement(curPage, m, flexQueue, false, ref curHeight) == FitResult.AddPage)
{
curHeight = boxSize.Height;
curPage.Filled = true;
curPage = AddPage(document, pageSize, contentArea);
}
}
}
// Stage two:
// Layout measurements on each page
foreach (var page in document.Pages)
{
var currentOffset = startOffset;
foreach (var measurement in page.Measurements)
{
var size = measurement.Size;
currentOffset.Y += measurement.Margin.Top;
var visualOffset = currentOffset;
visualOffset.X += measurement.Margin.Left;
measurement.Position = visualOffset;
Realign(measurement, boxSize, pageSize, measurement.Element.HorizontalAlignment);
measurement.Element.Arrange(measurement);
currentOffset.Y += size.Height;
currentOffset.Y += measurement.Margin.Bottom;
}
// Set number at the end of the page layouting
// so that any number changing elements can take effect
page.Number = document.PageNumbering.Next();
page.AddPageItems();
}
}
public void PeekAtNextItemInFlexQueue()
{
// Arrange
var queue = new FlexQueue<Tuple<string,int>>();
queue.Enqueue(new Tuple<string, int>("Entry1", 11111));
queue.Enqueue(new Tuple<string, int>("Entry2", 22222));
queue.Enqueue(new Tuple<string, int>("Entry3", 33333));
queue.Enqueue(new Tuple<string, int>("Entry4", 44444));
queue.Enqueue(new Tuple<string, int>("Entry5", 55555));
// Assert
Assert.AreEqual(5, queue.Count);
var nextItem = queue.Peek();
Assert.AreEqual(5, queue.Count);
Assert.AreEqual("Entry1", nextItem.Item1);
Assert.AreEqual(11111, nextItem.Item2);
}