public void EmptyEnumeratorPushBack()
{
var en = new PushBackEnumerator <int>(new List <int>(), 0, 0);
en.MoveNext().Should().BeFalse();
en.PushBack(-1);
en.MoveNext().Should().BeTrue();
en.Current.Should().Be(-1);
en.MoveNext().Should().BeFalse();
}
public void SingleContentEnumerator()
{
var en = new PushBackEnumerator <int>(new List <int> {
1, 2
}, 0, 1);
en.MoveNext().Should().BeTrue();
en.PushBack(-1);
en.Current.Should().Be(1);
en.MoveNext().Should().BeTrue();
en.Current.Should().Be(-1);
en.MoveNext().Should().BeFalse();
}
public void ThreeItemContentEnumerator()
{
var en = new PushBackEnumerator <int>(new List <int> {
1, 2, 3
}, 0, 3);
en.MoveNext().Should().BeTrue();
en.PushBack(-1);
en.Current.Should().Be(1);
en.MoveNext().Should().BeTrue();
en.Current.Should().Be(-1);
en.MoveNext().Should().BeTrue();
en.Current.Should().Be(2);
en.MoveNext().Should().BeTrue();
en.Current.Should().Be(3);
en.MoveNext().Should().BeFalse();
}
public void EmptyEnumerator()
{
var en = new PushBackEnumerator <int>(new List <int>(), 0, 0);
en.MoveNext().Should().BeFalse();
}
void Reflow(Size size)
{
float width = size.Width;
if (Style.GetValue(TextStyles.WrapText) != WrapText.Auto)
{
width = float.PositiveInfinity;
}
if (!Dirty && Math.Abs(width - lineWidth) < 0.5)
{
return;
}
lineWidth = -1;
for (var i = lineBreakContent.Count - 1; i >= 0; i--)
{
var v = lineBreakContent[i];
v.Chunk.RemoveNotify(this);
lineBreakContent.RemoveAt(i);
}
lineMetrics.Clear();
bool justified = GetAlignment() == Alignment.Fill;
var lineStartIndex = 0;
var lineEndIndex = 0;
float x = 0;
var enumerator = new PushBackEnumerator <ITextChunkView <TDocument> >(rawContent, 0, rawContent.Count);
var lineContent = new List <ITextChunkView <TDocument> >();
while (enumerator.MoveNext())
{
var chunk = enumerator.Current;
chunk.Measure(Size.Auto);
if (chunk.DesiredSize.Width <= width)
{
lineContent.Add(chunk);
x += chunk.DesiredSize.Width;
continue;
}
// Attempt a linebreak
ITextChunkView <TDocument> first;
ITextChunkView <TDocument> second;
chunk.BreakAt(width - x, out first, out second);
first.Measure(Size.Auto);
lineContent.Add(first);
width = Math.Max(x + first.DesiredSize.Width, width);
// Add all chunks for the current line into the break content.
lineEndIndex += AddNodes(lineContent, justified, size);
lineContent.Clear();
// only start a new line, if there is actual content in that line.
// This check avoids an empty line if the first line's content is
// too large to fit on the line.
var lineMetric = ComputeLineMetrics(lineStartIndex, lineEndIndex);
lineMetrics.Add(lineMetric);
AlignLineChunks(lineMetric, width);
lineStartIndex = lineEndIndex;
x = 0;
if (second != null)
{
enumerator.PushBack(second);
}
}
if (lineContent.Count > 0)
{
lineEndIndex += AddNodes(lineContent, justified, size);
var metrics = ComputeLineMetrics(lineStartIndex, lineEndIndex);
lineMetrics.Add(metrics);
AlignLineChunks(metrics, width);
}
if (justified && lineBreakContent.Count > 0)
{
var count = lineBreakContent.Count;
for (var i = 0; i < count; i++)
{
var jc = lineBreakContent[i].Chunk as JustifiedTextChunkView <TDocument>;
if (jc != null)
{
jc.LastLine = i == count - 1;
}
}
}
lineWidth = width;
}