public (HtmlToFlowDocument.Dom.FlowDocument Document, Dictionary <string, string> FontDictionary) OpenEbook(string fileName)
{
var epubBook = EpubReader.ReadBook(fileName);
_bookContent = epubBook.Content;
Dictionary <string, EpubTextContentFile> htmlFiles = _bookContent.Html;
Dictionary <string, EpubTextContentFile> cssFiles = _bookContent.Css;
var readingOrder = epubBook.ReadingOrder;
// ----------------- handle fonts ------------------------------
var fontDictionary = new Dictionary <string, string>(); // Key is the font name, value is the absolute path to the font file
var fontPath = Path.Combine(_instanceStorageService.InstanceStoragePath, "Fonts");
Directory.CreateDirectory(fontPath);
foreach (var entry in _bookContent.Fonts)
{
var fontName = entry.Key;
var bytes = entry.Value;
var fontFileName = Path.GetFileName(entry.Value.FileName);
fontFileName = Path.Combine(fontPath, fontFileName);
using (var stream = new FileStream(fontFileName, FileMode.Create, FileAccess.Write, FileShare.None))
{
var byteArray = bytes.Content;
stream.Write(byteArray, 0, byteArray.Length);
}
fontDictionary.Add(fontName, fontFileName);
}
// -------------------------------------------------------------
string GetStyleSheet(string name, string htmlFileNameReferencedFrom)
{
EpubTextContentFile cssFile;
// calculate absolute name with reference to htmlFileNameReferencedFrom
var absoluteName = HtmlToFlowDocument.CssStylesheets.GetAbsoluteFileNameForFileRelativeToHtmlFile(name, htmlFileNameReferencedFrom);
if (cssFiles.TryGetValue(absoluteName, out cssFile))
{
return(cssFile.Content);
}
// if this could not resolve the name, then try to go to parent directories
while (htmlFileNameReferencedFrom.Contains("/"))
{
var idx = htmlFileNameReferencedFrom.LastIndexOf("/");
htmlFileNameReferencedFrom = htmlFileNameReferencedFrom.Substring(0, idx - 1);
absoluteName = HtmlToFlowDocument.CssStylesheets.GetAbsoluteFileNameForFileRelativeToHtmlFile(name, htmlFileNameReferencedFrom);
if (cssFiles.TryGetValue(absoluteName, out cssFile))
{
return(cssFile.Content);
}
}
// if this was not successful, then try it with the name alone
if (cssFiles.TryGetValue(name, out cssFile))
{
return(cssFile.Content);
}
return(null);
// throw new ArgumentException($"CssFile {name} was not found!", nameof(name));
}
// Entire HTML content of the book
var converter = new HtmlToFlowDocument.Converter()
{
AttachSourceAsTags = true
};
var flowDocument = new HtmlToFlowDocument.Dom.FlowDocument();
foreach (EpubTextContentFile htmlFile in readingOrder)
{
string htmlContent = htmlFile.Content;
var textElement = converter.ConvertXHtml(htmlContent, false, GetStyleSheet, htmlFile.FileName); // create sections
flowDocument.AppendChild(textElement); // and add them to the flow document
}
Settings.BookSettings.BookFileName = fileName;
return(flowDocument, fontDictionary);
}