/// <summary>
/// Gets XHTML content for a file.
/// </summary>
/// <param name="ebook"></param>
/// <param name="navPoint"></param>
/// <returns></returns>
public static async Task <string> GetContentsAsync(this EBook ebook, ManifestItem manifestItem, bool embedImages = true)
{
var fullContentPath = Path.GetFullPath(ebook._rootFolder.Path.EnsureEnd("\\") + ebook.ContentLocation);
var tocPath = Path.GetFullPath(Path.GetDirectoryName(fullContentPath).EnsureEnd("\\") + ebook.Manifest["ncx"].ContentLocation);
var filePath = Path.GetFullPath(Path.GetDirectoryName(tocPath).EnsureEnd("\\") + manifestItem.ContentLocation);
var contentFile = await ebook._rootFolder.GetFileFromPathAsync(filePath.Substring(ebook._rootFolder.Path.Length));
var contents = await FileIO.ReadTextAsync(contentFile);
contents = WebUtility.HtmlDecode(contents);
if (embedImages)
{
var contentPath = Path.Combine(ebook._rootFolder.Path, manifestItem.ContentLocation);
var imageMatches = new Regex(@"<img.*/>", RegexOptions.IgnoreCase).Matches(contents).OfType <Match>().ToList();
foreach (var match in imageMatches)
{
var imageNode = HtmlNode.CreateNode(match.Value);
var imageSource = imageNode.Attributes["src"].Value;
var imgPath = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(contentPath), imageSource));
var imageFile = await ebook._rootFolder.GetFileFromPathAsync(imgPath.Substring(ebook._rootFolder.Path.Length));
var image = await FileIO.ReadBufferAsync(imageFile);
var base64 = Convert.ToBase64String(image.ToArray());
imageNode.Attributes["src"].Value = $"data:image/{imageFile.FileType};base64,{base64}";
contents = contents.Replace(match.Value, imageNode.OuterHtml);
}
}
return(contents);
}
public static SpineItem GetSpineItem(this EBook ebook, ManifestItem manifestItem)
{
var spineItem = ebook.Spine.FirstOrDefault(a => a.IdRef == manifestItem.Id);
return(spineItem);
}
public static string GetContents(this EBook eBook, ManifestItem manifestItem, bool embedImages = false, bool embedStyles = false)
{
var contents = File.ReadAllText(manifestItem.ContentLocation);
contents = WebUtility.HtmlDecode(contents);
if (embedImages)
{
var imageMatches = new Regex(@"<img.*/>", RegexOptions.IgnoreCase).Matches(contents).OfType <Match>().ToList();
foreach (var match in imageMatches)
{
var node = HtmlNode.CreateNode(match.Value);
var source = node.Attributes["src"].Value;
if (source.StartsWith("data:"))
{
continue;
}
var imagePath = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(manifestItem.ContentLocation), source));
var buffer = File.ReadAllBytes(imagePath);
var base64 = Convert.ToBase64String(buffer);
node.Attributes["src"].Value = $"data:image/{new FileInfo(imagePath).Extension};base64,{base64}";
contents = contents.Replace(match.Value, node.OuterHtml);
}
}
if (embedStyles)
{
var styleRegex = new Regex(@"<style>(.*?)<\/style>", RegexOptions.IgnoreCase | RegexOptions.Singleline);
var styleMatch = styleRegex.Match(contents);
var styleBuilder = new StringBuilder();
if (styleMatch.Success)
{
styleBuilder.Append(styleMatch.Groups[styleMatch.Groups.Count - 1]);
}
var stylesheetRegex = new Regex(@"<link.*?rel=""stylesheet"".*?>", RegexOptions.IgnoreCase);
var stylesheetMatches = stylesheetRegex.Matches(contents).OfType <Match>().ToList();
foreach (var match in stylesheetMatches)
{
var node = HtmlNode.CreateNode(match.Value);
var location = node.Attributes["href"].Value;
var file = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(manifestItem.ContentLocation), location));
if (!File.Exists(file))
{
continue;
}
var css = File.ReadAllText(file);
styleBuilder.Append(css);
contents = contents.Replace(match.Value, string.Empty);
}
var styleTag = $"<style>{styleBuilder.ToString()}</style>";
if (styleMatch.Success)
{
contents = contents.Replace(styleMatch.Value, styleTag);
}
else
{
var endOfHead = contents.IndexOf("</head>");
contents = contents.Insert(endOfHead, styleTag);
}
}
return(contents);
}
