/// <summary>
/// Merge two line to one line.
/// </summary>
/// <param name="mergeLines">Line to be merged.</param>
void MergeLines(FormLineList mergeLines, FormLineList sameLevelLines)
{
if (mergeLines == null || mergeLines.Count < 2)
{
return;
}
FormLine firstLine = mergeLines[0];
bool isHorizontal = firstLine.IsTransverseLine;
if (isHorizontal)
{
List <double> xValues = mergeLines.Select(line => line.StartPoint.x).
Concat(mergeLines.Select(line => line.EndPoint.x)).ToList();
firstLine.StartPoint.x = xValues.Min();
firstLine.EndPoint.x = xValues.Max();
}
else
{
List <double> yValues = mergeLines.Select(line => line.StartPoint.y).
Concat(mergeLines.Select(line => line.EndPoint.y)).ToList();
firstLine.StartPoint.y = yValues.Min();
firstLine.EndPoint.y = yValues.Max();
}
for (int i = 1; i < mergeLines.Count; i++)
{
sameLevelLines.Remove(mergeLines[i]);
}
}
/// <summary>
/// Remove short lines from line dictionary.
/// </summary>
/// <param name="diclines">Line dictionary</param>
void RemoveTooShortAndTooLongLines(Page page, SortedDictionary <double, FormLineList> diclines, bool isHorizontial, Rect posRect)
{
double[] pageSize = PdfTronHelper.GetPageSize(page);
double maxLength = isHorizontial ? pageSize[0] : pageSize[1];
diclines.Where(pair => pair.Value.Exists(line => Math.Abs(line.Length - maxLength) < 3))
.Select(pair => pair.Key).ToList()
.ForEach(key => diclines.Remove(key));
FormLineList _lines = new FormLineList(diclines.SelectMany(pair => pair.Value).ToList());
if (_lines.Count > 1)
{
if (isHorizontial)
{
double[] textLeftRightXValue = pdfTronHelper.GetLeftRightTextBounds(page);
maxLength = (textLeftRightXValue[1] - textLeftRightXValue[0]);
diclines.Where(x => x.Value.Sum(line => line.Length) < maxLength * 0.5
).Select(x => x.Key).ToList().ForEach(key => diclines.Remove(key));
foreach (double key in diclines.Keys.ToArray())
{
FormLineList lines = diclines[key];
if (lines.Count < 2)
{
continue;
}
double _maxLength = lines.Max(line => line.Length);
FormLine maxLengthLine = lines.Find(line => line.Length == _maxLength);
lines.Where(line => line.Length < (_maxLength * 0.7)).ToList().ForEach(line => lines.Remove(line));
}
FormLineList templines = new FormLineList(diclines.SelectMany(pair => pair.Value).ToList());
if (templines.Count > 1)
{
maxLength = templines.Select(line => line.Length).Max();
double scale = 0.4;
double minLength = maxLength * scale;
IEnumerable <double> shortLineKeys = diclines.Where(
x => x.Value.Sum(line => line.Length) < minLength
).Select(x => x.Key);
shortLineKeys.ToList().ForEach(key => diclines.Remove(key));
}
}
else
{
maxLength = posRect.Height();
if (posRect.Height() < 300)
{
maxLength = _lines.Select(line => line.Length).Max();
}
double minLength = maxLength * 0.4;
if (minLength < 9)
{
minLength = 9;
}
IEnumerable <double> shortLineKeys = diclines.Where(
x => x.Value.Sum(line => line.Length) < minLength
).Select(x => x.Key);
shortLineKeys.ToList().ForEach(key => diclines.Remove(key));
}
}
else
{
diclines.Clear();
}
}