public HDocument ParseHocr(HDocument hOrcDoc, string hOcrFile, bool append)
{
_hDoc = hOrcDoc;
if (_doc == null)
{
_doc = new HtmlDocument();
}
_hOcrFilePath = hOcrFile;
if (File.Exists(hOcrFile) == false)
{
throw new Exception("hocr file not found");
}
_currentPage = null;
_currentPara = null;
_currentLine = null;
_doc.Load(hOcrFile, Encoding.UTF8);
HtmlNode body = _doc.DocumentNode.SelectNodes("//body")[0];
HtmlNodeCollection nodes1 = body.SelectNodes("//div");
//#Issue #1 reported by Ryan-George
IEnumerable <HtmlNode> divs = body.ChildNodes.Where(node => node.Name.ToLower() == "div");
HtmlNodeCollection nodes = new HtmlNodeCollection(null);
foreach (HtmlNode div in divs)
{
nodes.Add(div);
}
_hDoc.ClassName = "body";
ParseNodes(nodes);
return(_hDoc);
}
private void ParseNodes(HtmlNodeCollection nodes)
{
foreach (HtmlNode node in nodes.ToList())
{
if (node.HasAttributes)
{
string className = string.Empty;
string title = string.Empty;
string id = string.Empty;
if (node.Attributes["class"] != null)
{
className = node.Attributes["class"].Value;
}
if (node.Attributes["title"] != null)
{
title = node.Attributes["title"].Value;
}
if (node.Attributes["Id"] != null)
{
id = node.Attributes["Id"].Value;
}
switch (className)
{
case "ocr_page":
_currentPage = new HPage();
_currentPage.ClassName = className;
_currentPage.Id = id;
ParseTitle(title, _currentPage);
_currentPage.Text = node.InnerText;
_hDoc.Pages.Add(_currentPage);
break;
case "ocr_par":
_currentPara = new HParagraph();
_currentPara.ClassName = className;
_currentPara.Id = id;
ParseTitle(title, _currentPara);
_currentPara.Text = node.InnerText;
_currentPage.Paragraphs.Add(_currentPara);
break;
case "ocr_line":
_currentLine = new HLine(_dpi);
_currentLine.ClassName = className;
_currentLine.Id = id;
ParseTitle(title, _currentLine);
_currentLine.Text = node.InnerText;
if (_currentPage == null)
{
_currentPage = new HPage();
}
if (_currentPara == null)
{
_currentPara = new HParagraph();
_currentPage.Paragraphs.Add(_currentPara);
}
_currentPara.Lines.Add(_currentLine);
break;
case "ocrx_word":
HWord w = new HWord();
w.ClassName = className;
w.Id = id;
ParseTitle(title, w);
w.Text = node.InnerText;
_currentLine.Words.Add(w);
break;
case "ocr_word":
HWord w1 = new HWord();
w1.ClassName = className;
w1.Id = id;
ParseTitle(title, w1);
w1.Text = node.InnerText;
_currentLine.Words.Add(w1);
break;
case "ocr_cinfo": //cuneiform only
ParseCharactersForLine(title);
break;
}
}
ParseNodes(node.ChildNodes);
}
}