/// <summary>
/// Get the hOCR string for the path.
/// <para>http://kba.cloud/hocr-spec/1.2/#elementdef-ocr_linedrawing</para>
/// </summary>
/// <param name="path"></param>
/// <param name="pageHeight"></param>
/// <param name="subPaths"></param>
/// <param name="level">The indent level.</param>
private string GetCode(PdfPath path, double pageHeight, bool subPaths, int level)
{
if (path == null)
{
return(string.Empty);
}
string hocr = string.Empty;
if (subPaths)
{
var bbox = path.GetBoundingRectangle();
if (bbox.HasValue)
{
areaCount++;
hocr += GetIndent(level) + @"<div class='ocr_carea' id='block_" + pageCount + "_"
+ areaCount + "' title='" + GetCode(bbox.Value, pageHeight) + "'>\n";
foreach (var subPath in path.Commands)
{
var subBbox = subPath.GetBoundingRectangle();
if (subBbox.HasValue)
{
pathCount++;
hocr += GetIndent(level + 1) + @"<span class='ocr_linedrawing' id='drawing_" + pageCount + "_"
+ pathCount + "' title='" + GetCode(subBbox.Value, pageHeight) + "' />\n";
}
}
hocr += GetIndent(level) + @"</div>";
}
}
else
{
var bbox = path.GetBoundingRectangle();
if (bbox.HasValue)
{
pathCount++;
hocr += GetIndent(level) + @"<span class='ocr_linedrawing' id='drawing_" + pageCount + "_"
+ pathCount + "' title='" + GetCode(bbox.Value, pageHeight) + "' />";
}
}
return(hocr);
}
private PageXmlDocument.PageXmlLineDrawingRegion ToPageXmlLineDrawingRegion(PdfPath pdfPath, double pageWidth, double pageHeight)
{
var bbox = pdfPath.GetBoundingRectangle();
if (bbox.HasValue)
{
regionCount++;
return(new PageXmlDocument.PageXmlLineDrawingRegion()
{
Coords = ToCoords(bbox.Value, pageWidth, pageHeight),
Id = "r" + regionCount
});
}
return(null);
}
private AltoDocument.AltoGraphicalElement ToAltoGraphicalElement(PdfPath pdfPath, decimal height)
{
graphicalElementCount++;
var rectangle = pdfPath.GetBoundingRectangle();
if (rectangle.HasValue)
{
return(new AltoDocument.AltoGraphicalElement
{
VerticalPosition = (float)Math.Round((height - rectangle.Value.Top) * scale),
HorizontalPosition = (float)Math.Round(rectangle.Value.Left * scale),
Height = (float)Math.Round(rectangle.Value.Height * scale),
Width = (float)Math.Round(rectangle.Value.Width * scale),
Rotation = 0,
StyleRefs = null,
TagRefs = null,
Title = null,
Type = null,
Id = "P" + pageCount + "_GE" + graphicalElementCount.ToString("#00000")
});
}
return(null);
}
